Agilent Technologies 8752C Service Manual Download

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Safety

Symbols

The

following

safety

symbols

are

used

throughout

this

manual.

amiliarize

yourself

with

each

the

symbols

and

its

meaning

before

operating

this

instrument.

Caution

denotes

hazard.

calls

attention

procedure

that,

not

correctly

performed

adhered

would

result

damage

destruction

the

instrument.

not

proceed

beyond

caution

note

until

the

indicated

conditions

are

fully

understood

and

met.

arning

denotes

hazard.

calls

attention

procedure

which,

not

correctly

performed

adhered

could

result

injury

loss

life

not

proceed

beyond

warning

note

until

the

indicated

conditions

are

fully

understood

and

met.

15-4

Safety

and

Licensing

Summary of Contents for 8752C

Page 1: ...Service Guide Agilent Technologies 8752C Network Analyzer Manufacturing Part Number 08752 90136 Printed in USA Print Date February 1998 Supersedes December 1997 Agilent Technologies Inc 1998 ...

Page 2: ...OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING USE OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN SHOULD AGILENT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS THE WAR RANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL DFARS Restricted Rights Notice If softwa...

Page 3: ...tation from the Web download the PDF file from the Agilent web site Go to http www agilent com Enter the document s part number located on the title page in the Quick Search box Click GO Click on the hyperlink for the document Click the printer icon located in the tool bar ...

Page 4: ...87 44 22 Belgium tel 32 0 2 404 9340 alt 32 0 2 404 9000 fax 32 0 2 404 9395 Denmark tel 45 7013 1515 alt 45 7013 7313 fax 45 7013 1555 Finland tel 358 10 855 2100 fax 358 0 10 855 2923 France tel 0825 010 700 alt 33 0 1 6453 5623 fax 0825 010 701 Germany tel 01805 24 6333 alt 01805 24 6330 fax 01805 24 6336 Ireland tel 353 0 1 890 924 204 alt 353 0 1 890 924 206 fax 353 0 1 890 924 024 Israel tel...

Page 5: ...Service Guide HP 8752C Network Analyzer ABCDE HP Part No 08752 90136 Supersedes December 1997 Printed in USA February 1998 ...

Page 6: ... this material including but not limited to the implied warranties of merchantability and tness for a particular purpose Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material c Copyright 1995 1997 1998 Hewlett Packard Company ...

Page 7: ...0 Test Port Cable 1 8 Option AFP add 75 Test Port Cable 1 8 Option B02 External Disk Drive 1 8 Service and Support Options 1 9 2 System Veri cation and Performance Tests How to Test the Performance of Your Analyzer 2 1 Sections in this Chapter 2 2 HP 8752C System Veri cation 2 3 Equipment 2 3 Description 2 3 System Veri cation Cycle and Kit Recerti cation 2 4 Measurement Uncertainty 2 4 Measuremen...

Page 8: ...ty For HP 8752C Analyzers without Option 004 2 15 Speci cations 2 15 Equipment 2 15 Description 2 15 Procedure 2 16 Power Range and Level Linearity for an HP 8752C or an HP 8752C Option 075 2 16 Power Range and Level Linearity for an HP 8752C with Option 003 2 17 Power Range and Level Linearity for an HP 8752C with Options 003 and 075 2 18 Power Range and Level Linearity for an HP 8752C with Optio...

Page 9: ... Option 003 with an IF BW of 10 Hz 2 26 Noise Floor Level at 3 GHz to 6 GHz Option 006 with an IF BW of 10 Hz 2 27 Noise Floor Level at 3 GHz to 6 GHz Option 006 with IF BW of 3 kHz 2 28 In case of di culty 2 28 5 Transmission Test Port Input Noise Floor Level HP 8752C with Option 075 2 29 Speci cations 2 29 Equipment 2 29 Description 2 29 Procedure 2 29 Noise Floor Level at 300 kHz to 1 3 GHz Opt...

Page 10: ... HP 8752C All Options 2 40 Speci cations 2 40 Equipment 2 40 Description 2 41 Procedure 2 41 In case of di culty 2 44 9 Phase Dynamic Accuracy HP 8752C All Options 2 45 Speci cations 2 45 Equipment 2 45 Description 2 45 Procedure 2 46 10 Compression 2 47 Speci cations 2 47 Equipment 2 47 Description 2 47 Procedure 2 48 In case of di culty 2 49 Performance Test Record 2 50 3 Adjustments and Correct...

Page 11: ...r Calibration Factor Entry 3 12 Source Correction Routine 3 13 6 Source Pretune Correction Constants Test 48 3 14 Equipment Required 3 14 Warm up time 3 14 Description and Procedure 3 14 7 Display Intensity Adjustments Test 49 3 15 Equipment Required 3 15 Warm up time 3 15 Description and Procedure 3 15 Background Adjustment 3 15 Maximum Intensity Adjustment 3 16 Operating Default Intensity Adjust...

Page 12: ... EEPROMs Test 58 3 37 15 EEPROM Backup Disk Procedure 3 38 Equipment Required 3 38 Warm up time 3 38 Description and Procedure 3 38 How to Make an EEPROM Backup Disk and Store CCs and Data to It 3 39 How to Recall CC Data from the EEPROM Disk into the Analyzer 3 40 16 Model Number Correction Constant Option 075 Only 3 42 Equipment 3 42 Warmup time 3 42 Description and Procedure 3 42 17 Vertical Po...

Page 13: ...Procedure 3 58 4 Start Troubleshooting Here Assembly Replacement Sequence 4 2 Having Your Analyzer Serviced 4 2 Step 1 Initial Observations 4 3 Initiate the Analyzer Self Test 4 3 If the Self Test Failed 4 3 Step 2 Con dence Test 4 4 Procedure 4 4 Cable Con dence Test 4 5 Procedure 4 5 Step 3 HP IB Systems Check 4 7 If Using a Plotter or Printer 4 8 If Using an External Disk Drive 4 8 Troubleshoot...

Page 14: ...ature 5 13 Inspect the Motherboard 5 13 If the Green LEDs On A8 are not All On 5 14 Remove A8 Maintain A15W1 Cable Connection 5 14 Check the A8 Fuses and Voltages 5 14 Remove the Assemblies 5 15 Brie y Disable the Shutdown Circuitry 5 16 Inspect the Motherboard 5 18 Error Messages 5 19 Check the Fuses and Isolate A8 5 21 Fan Troubleshooting 5 22 Fan Speeds 5 22 Check the Fan Voltages 5 22 Short A8...

Page 15: ...st Function 6 18 HP IB Failures 6 18 7 Source Troubleshooting Assembly Replacement Sequence 7 2 Before You Start Troubleshooting 7 2 Power 7 3 1 Source Default Correction Constants Test 44 7 3 2 RF Output Power Correction Constants Test 47 7 3 3 Sampler Magnitude and Phase Correction Constants Test 53 7 3 Phase Lock Error 7 4 Phase Lock Loop Error Message Check 7 4 A4 Sampler Mixer Check 7 6 A3 So...

Page 16: ... PLL DIAG 7 37 Phase Lock Check by Signal Examination 7 37 Source Group Troubleshooting Appendix 7 39 Troubleshooting Source Problems with the Analog Bus 7 39 Phase Lock Diagnostic Tools 7 39 Phase Lock Error Messages 7 39 Phase Lock Diagnostic Routines 7 40 Broadband Power Problems 7 40 8 Receiver Troubleshooting Assembly Replacement Sequence 8 2 Receiver Failure Error Messages 8 2 CAUTION OVERLO...

Page 17: ... 10 3 Test Options Menu 10 5 Self Diagnose Softkey 10 7 Test Descriptions 10 7 Internal Tests 10 7 External Tests 10 12 System Veri cation Tests 10 13 Adjustment Tests 10 14 Display Tests 10 16 Test Patterns 10 17 Service Key Menus Service Features 10 19 Service Modes Menu 10 20 Service Modes More Menu 10 23 Analog Bus 10 25 Description of the Analog Bus 10 25 The Main ADC 10 25 The Frequency Coun...

Page 18: ...nt System Components 11 11 A ected Measurements 11 11 Procedure 11 11 Source Match ES After a Re ection 1 Port Calibration 11 13 Description 11 13 Signi cant System Components 11 13 A ected Measurements 11 13 Procedure 11 13 Re ection Tracking ER After a Re ection 1 Port Calibration 11 15 Description 11 15 Signi cant System Components 11 15 A ected Measurements 11 15 Procedure 11 15 Isolation Cros...

Page 19: ...lator 12 8 Voltage Indications the Green LEDs 12 8 Shutdown Circuit 12 8 Variable Fan Circuit and Air Flow Detector 12 8 Display Power 12 9 Probe Power 12 9 Digital Control Theory 12 9 A1 Front Panel Keyboard 12 10 A2 Front Panel Processor 12 11 A9 CPU A10 Digital IF 12 11 Main CPU 12 11 Main RAM 12 11 EEPROM 12 12 Digital Signal Processor 12 12 A18 Display 12 12 A19 GSP 12 12 A16 Rear Panel 12 13...

Page 20: ...ssemblies 13 10 Cables Top View 13 12 Front Panel Cables and Attaching Hardware 13 14 Rear Panel Cables and Attaching Hardware 13 16 Source and Sampler Parts Standard and Option 003 13 18 Source and Sampler Parts Option 004 006 13 20 Source and Sampler Parts Options 004 and 003 004 13 22 Source and Sampler Parts Option 006 13 24 Display Bezel Assembly 13 26 Chassis Parts 13 28 Top View of Attachin...

Page 21: ...ll 14 13 A16 Rear Panel Board Assembly 14 14 How to Remove the Rear Panel 14 14 Reverse Removal Procedure to Reinstall 14 15 A18 Display 14 16 How to Remove the Display 14 16 How to Reinstall the Display 14 17 A30 Directional Coupler 14 18 How to Remove the Directional Coupler 14 18 Reverse Removal Procedure to Reinstall 14 19 B1 Fan 14 20 How to Remove the Fan 14 20 Reverse Removal Procedure to R...

Page 22: ...Before Applying Power 15 6 Servicing 15 6 Index Contents 16 ...

Page 23: ...n Test Port Input Noise Floor Level Test Setup 2 2 30 2 12 Test Port Crosstalk Test Setup 2 33 2 13 Re ection Trace Noise Test Setup 2 37 2 14 Transmission Trace Noise Test Setup 2 38 2 15 Magnitude Dynamic Accuracy Test Setup 2 42 2 16 Compression Test Setup 2 48 3 1 Location of Major Assemblies 3 6 3 2 NRM Normal and ALT Alter Positions of A9 CC Jumper 3 7 3 3 Source Adjustment Setup 3 11 3 4 Ma...

Page 24: ...Typical Measurement Trace 4 15 4 7 HP 8752C Overall Block Diagram 1 of 4 4 17 5 1 Power Supply Group Simpli ed Block Diagram 5 3 5 2 Location of A15 Diagnostic LEDs 5 4 5 3 A8 Post Regulator Test Point Locations 5 5 5 4 Removing the Line Fuse 5 7 5 5 Power Supply Cable Locations 5 9 5 6 A15W1 Plug Detail 5 11 5 7 Front Panel Probe Power Connector Voltages 5 20 5 8 Power Supply Block Diagram 5 25 6...

Page 25: ... Signals 7 31 7 22 H MB Signal at A14P1 5 Preset and 16 MHz to 31 MHz Sweep 7 32 7 23 Pulse Generator Output 7 33 7 24 High Quality Comb Tooth at 3 GHz 7 34 7 25 Stable HI OUT Signal in FRACN TUNE Mode 7 35 7 26 Typical 1st IF Waveform in FRACN TUNE SRC TUNE Mode 7 36 7 27 FM Coil Plot with 3 Point Sweep 7 38 8 1 Sample R Input Trace 8 4 8 2 Sample A Input Trace 8 5 8 3 Sample B Input Trace 8 6 8 ...

Page 26: ...f the Network Analyzer System 12 2 12 2 Power Supply Functional Group Simpli ed Block Diagram 12 6 12 3 Digital Control Group Block Diagram 12 10 12 4 Low Band Operation of the Source 12 17 12 5 High Band Operation of the Source 12 21 12 6 Receiver Functional Group standard and Option 003 12 24 12 7 Receiver Functional Group Option 003 and 004 12 25 12 8 Receiver Functional Group Option 006 12 26 ...

Page 27: ...14 12 Location of Directional Coupler Hardware 14 19 14 13 Location of Fan Wire Bundle and Screws 14 20 Contents 21 ...

Page 28: ...Reference Frequencies 7 15 7 4 A12 Related Digital Control Signals 7 23 7 5 VCO Range Check Frequencies 7 25 7 6 A14 to A13 Digital Control Signal Locations 7 30 7 7 1st IF Waveform Settings 7 36 7 8 A11 Input Signals 7 38 8 1 Signals Required for A10 Assembly Operation 8 9 8 2 2nd IF 4 kHz Signal Locations 8 12 8 3 2nd LO Locations 8 13 9 1 Components Related to Speci c Error Terms 9 4 10 1 Test ...

Page 29: ...ions Table of Service Test Equipment The following tables list the tools and test equipment required to perform the analyzer s system veri cation troubleshooting adjustment and performance tests Service Equipment and Analyzer Options 1 1 ...

Page 30: ...nsor Frequency 300 kHz 3 GHz 75 HP 8483A Opt H03 P Photometer Tektronix J16 A Photometer Probe Tektronix J6503 A Light Occluder Tektronix 016 0305 00 A CRT Demagnetizer or Bulk Tape Eraser A Printer HP ThinkJet DeskJet LaserJet P Disk Drive 3 5 inch HP 9122 Floppy Disk 3 5 inch HP 92192A A Calibration Kit Type N 50 No substitute HP 85032B P Calibration Kit Type N 75 No substitute HP 85036B P Veri ...

Page 31: ... P Adapter type N m to type N m HP P N 1250 1528 P RF Cable 24 inch type N 75 HP P N 8120 2408 A P RF Cable 24 inch type N 50 HP P N 8120 4781 A P RF Cable Set type N 50 HP 11851B P HP IB Cable HP 10833A B C D A Coax Cable BNC HP P N 8120 1840 A Coax Cable BNC m to BNC m 50 HP 10503A A Antistatic Wrist Strap HP P N 9300 1367 A T P Antistatic Wrist Strap Cord HP P N 9300 0980 A T P Static control T...

Page 32: ...ge 5 16 inch open end wrench for SMA nuts 3 16 5 16 and 9 16 inch hex nut drivers 5 16 inch open end torque wrench set to 10 in lb 2 5 mm hex key driver Non conductive and non ferrous adjustment tool Needle nose pliers Tweezers Antistatic work mat with wrist strap 1 4 Service Equipment and Analyzer Options ...

Page 33: ...ng and gaging connectors Having good connector care and connection techniques extends the life of these devices In addition you obtain the most accurate measurements This type of information is typically located in Chapter 3 of the calibration kit manuals For additional connector care instruction contact your local Hewlett Packard Sales and Service O ce about course numbers HP 85050A 24A and HP 85...

Page 34: ...rasives Use isopropyl alcohol Get liquid into plastic support beads Clean connector threads Gaging Connectors Do Do Not Clean and zero the gage before use Use an out of spec connector Use the correct gage type Use correct end of calibration block Gage all connectors before rst use Making Connections Do Do Not Align connectors carefully Apply bending force to connection Make preliminary connection ...

Page 35: ...playing the re ection coe cient of a network versus time determines the magnitude and location of each discontinuity Displaying the transmission coe cient of a network versus time determines the characteristics of individual transmission paths Time domain operation retains all accuracy inherent with the correction that is active in such devices as SAW lters SAW delay lines RF cables and RF antenna...

Page 36: ... male test port cable and a type N female to type N female adapter Instructions are included for storing a new internal calibration to account for the e ects of this cable Option AFP add 75 Test Port Cable This option provides a 75 type N male to type N female test port cable Instructions are included for storing a new internal calibration to account for the e ects of this cable Option B02 Externa...

Page 37: ...calibration options for your analyzer Contact the nearest Hewlett Packard sales or service o ce for information on options available for your analyzer See the table titled Hewlett Packard Sales and Service O ces in Chapter 15 Service Equipment and Analyzer Options 1 9 ...

Page 38: ......

Page 39: ...neer will issue a Certi cate of Calibration for your analyzer if two conditions are met Your analyzer passes all the performed tests The equipment and standards that were used to perform the tests are traceable to a national standards institute Note If you have a particular type of measurement application that does not use all of the analyzer s measurement capabilities you may ask your local Hewle...

Page 40: ...Output Power Range and Level Linearity HP 8752C with Option 004 4 Transmission Test Port Input Noise Floor Level HP 8752C without Option 075 5 Transmission Test Port Input Noise Floor Level HP 8752C with Option 075 6 Test Port Crosstalk 7 System Trace Noise 8 Magnitude Dynamic Accuracy HP 8752C 0 All Options 9 Phase Dynamic Accuracy HP 8752C 0 All Options 10 Compression HP 8752C Performance Test R...

Page 41: ...type N calibration kit and comparing the measured data to the speci cation limits drawn on the analyzer display The measured data must fall within the speci cation limits at all frequencies to pass the test System veri cation is only part of an instrument s calibration procedure The complete set of instrument speci cations can be tested by performing the HP 8752C System Veri cation and all of the ...

Page 42: ...dom errors include errors due to noise drift connector repeatability and test cable stability The typical measurement uncertainties for type N connectors using a 1 port error correction utilize an RSS Root Sum of Squares model for the contributions of random errors such as noise pin depth pin diameter variation load return loss and connector repeatability Measurement Uncertainty Window The PASS FA...

Page 43: ...Figure 2 1 Measurement Uncertainty Window System Veri cation and Performance Tests 2 5 ...

Page 44: ...8 dB 3 0 GHz to 6 0 GHz 20 dB 62 88 dB Source Match Transmission Frequency Range Speci cation Measurement Uncertainty 300 kHz to 1 3 GHz 23 dB 62 51 dB 1 3 GHz to 3 0 GHz 20 dB 62 88 dB 3 0 GHz to 6 0 GHz 16 dB 62 88 dB Option 004 may degrade transmission source match as much as 2 dB resulting in up to 0 05 dB additional uncertainty in transmission tracking Re ection Tracking Frequency Range Speci...

Page 45: ...to 1 3 GHz 60 2 dB 60 043 dB 1 3 GHz to 3 0 GHz 60 3 dB 60 086 dB 3 0 GHz to 6 0 GHz 60 5 dB 60 172 dB HP 8752C Type N Test Port Characteristics 75 System Directivity Frequency Range Speci cation Measurement Uncertainty 300 kHz to 10 MHz 30 dB 64 41 dB 10 MHz to 1 3 GHz 40 dB 64 41 dB 1 3 GHz to 3 0 GHz 35 dB 64 41 dB Source Match Re ection Frequency Range Speci cation Measurement Uncertainty 300 ...

Page 46: ...on tracking Re ection Tracking Frequency Range Speci cation Measurement Uncertainty 300 kHz to 1 3 GHz 60 2 dB 60 2 dB 1 3 GHz to 3 0 GHz 60 3 dB 60 3 dB Load Match Frequency Range Speci cation Measurement Uncertainty 300 kHz to 1 3 GHz 23 dB 60 50 dB 1 3 GHz to 3 0 GHz 20 dB 60 64 dB Transmission Tracking Frequency Range Speci cation Measurement Uncertainty 300 kHz to 1 3 GHz 60 2 dB 60 20 dB 1 3...

Page 47: ...NNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SYS VER TESTS NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST A brief description of the test procedure is shown on the analyzer display To begin the test press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE 4 Connect a type N male open to the analyzer s re ection test port Press NNNNNNNNNNNNNNNNNNNNNNNNNN CO...

Page 48: ...s transmission tracking Otherwise press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE to access this test 9 Press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE to end the system veri cation procedure In case of di culty 1 Refer to the Adjustments and Correction Constants chapter of this manual Perform the Frequency Response Correction Constants Adjustment procedure Repeat the HP 8752C System Veri cation procedure 2 1...

Page 49: ...order in which they should be performed 1 Re ection Test Port Output Frequency Range and Accuracy 2 Re ection Test Port Output Power Range and Level Linearity For HP 8752C Analyzers without Option 004 3 Re ection Test Port Output Power Range and Level Linearity For HP 8752C Analyzers with Option 004 4 Transmission Test Port Input Noise Floor Level For HP 8752C Analyzers without Option 075 5 Transm...

Page 50: ...n H033 Printer 1 HP ThinkJet DeskJet LaserJet 110 dB step attenuator 1 HP 8496A 2 Way power splitter 50 1 HP 11667A Cable 50 type N 24 inch 3 HP P N 8120 4781 Cable 75 type N 24 inch 2 HP P N 8120 24081 Minimum Loss Pad 2 HP 11852B1 Adapter type N m to type N m 1 HP P M 1250 1528 Adapter BNC m to N f 1 HP P N 1250 0077 Adapter APC 3 5mm f to N f 1 HP P N 1250 1745 1 Required only for instruments w...

Page 51: ...apter BNC m to N f HP P N 1250 0077 Adapter APC 3 5 f to N f HP P N 1250 1745 Cable 50 type N 24 inch HP P N 8120 4781 Additional equipment required for analyzers with Option 075 50 to 75 minimum loss pad HP 11852B Warm up time 30 minutes Description This test determines the analyzer s re ection test port output frequency range and accuracy over its entire operating frequency range The frequencies...

Page 52: ...ed in the appropriate table 2 through 6 in the Performance Test Record In case of di culty 1 If any measured frequency barely fails the speci cation check the time base accuracy of the frequency counter 2 If the analyzer fails by a signi cant margin at all frequencies perform the Frequency Accuracy and the High Low Band Transition adjustments Refer to the chapter titled Adjustments and Correction ...

Page 53: ...ower meter HP 436A 437B 438A Power sensor HP 8483A Warm up time 30 minutes Description This test determines the re ection test port output power range and level linearity for all analyzers without Option 004 The speci cations are veri ed by rst setting a reference at 05 dBm for relative power measurements Next the analyzer s re ection test port output power is stepped and measured over its operati...

Page 54: ...ure 2 3 Re ection Test Port Output Power Range and Level Linearity Test Setup 2 Zero and calibrate the power meter For more information on how to perform this task refer to the power meter Operating and Service manual 3 Press 4PRESET5 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 435 405 405 4k m5 4 Press NNNNNNNNNNNNNNNNN POWER 405 455 4x15 Set the power meter cal factor for this CW frequency On the pow...

Page 55: ...5 on the HP 436A 438A power meter front panel for relative power measurements 11 Repeat steps 5 6 and 7 for the other power levels listed in the HP 8752C Performance Test Record 8 of 28 12 This completes the Re ection Test Port Output Power Range and Level Linearity test if you are working with either a standard analyzer or an analyzer with only Option 075 Otherwise go to the appropriate section b...

Page 56: ...28 Power Range and Level Linearity for an HP 8752C with Option 006 21 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 465 4G n5 22 Perform steps 14 15 16 17 and 18 for the power levels listed in the Performance Test Record 10 of 28 In case of di culty 1 If you cannot set the test port power at any power level be sure the analyzer s source power is activated To do so press 4MENU5 NNNNNNNNNNNNNNNNN POW...

Page 57: ...uired for analyzers with Option 075 Power meter HP436A 437B 438A Power sensor HP 8483A Cable 75 type N 24 inch HP P N 8120 2408 Warm up time 30 minutes Description This test determines the re ection test port output power range and level linearity for an analyzer with Option 004 To verify the analyzer power ranges a power level of 010 dBm is rst selected and normalized Next various power levels in...

Page 58: ...NNN POWER RANGES NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN RANGE 0 015 to 10 Enter the power level value listed in the the Performance Test Record 14 of 28 For this power range press 405 415 405 4x15 4 Press 4DISPLAY5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEMORY NNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEM 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN SCALE DIV 4 5 455 4x15 to normalize...

Page 59: ... power range press 405 425 405 4x15 9 Repeat steps 6 7 and 8 for the other power ranges listed in the Performance Test Record 14 of 28 Power Level Linearity for an HP 8752C with Option 004 or an HP 8752C withOptions 004 and 075 1 Connect the equipment as shown in Figure 2 5 Note For instruments with Option 075 a use an HP 8483A 75 power sensor b use tables 19 through 21 in the Performance Test Rec...

Page 60: ... Repeat steps 5 6 and 7 for the other power levels listed in the Performance Test Record 9 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 415 4 5 435 4G n5 10 Press NNNNNNNNNNNNNNNNN POWER 405 455 4x15 Set the power meter cal factor for this CW frequency Press the appropriate hardkey 4dB REF5 or 4REL5 on the HP 436A 438A power meter front panel for relative power measurements 11 Repeat steps 5 6 7 a...

Page 61: ...r the power levels listed in the Performance Test Record Power Level Linearity for an HP 8752C with Options 003 004 and 075 21 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 425 4G n5 22 Perform steps 14 15 16 17 and 18 for the power levels listed in the Performance Test Record In case of di culty 1 If you cannot set the test port power at any power level be sure the analyzer s source power is activ...

Page 62: ...Bm 1 HP 8752C with Option 003 2 HP 8752C with Option 006 Equipment Calibration kit 50 type N HP 85032B Cable 50 type N 24 inch HP P N 8120 4781 Warm up time one hour Description This test determines the analyzer s transmission test port input noise oor level It is tested at 0 dBm at two di erent IF bandwidths Procedure Noise Floor Level at 300 kHz to 1 3 GHz Standard Option 300 kHz to 3 GHz Option...

Page 63: ...If your analyzer has Option 006 press 4STOP5 465 4G n5 3 Press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN INPUT PORTS NNNNN B 4DISPLAY5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEMORY NNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEM 4 Connect the equipment as shown in Figure 2 7 Figure 2 7 Transmission Test Port Input Noise Floor Level Test Setup 2 System Veri cation and Performance Tests 2 25 ...

Page 64: ...alculated value on the Performance Test Record 22 of 28 Note If your analyzer has Option 003 then record the value calculated during the previous step step 8 on the Performance Test Record under section HP 8752C Option 003 ONLY Noise Floor Level at 300 kHz to 1 3 GHz Standard Option or 300 kHz to 3 GHz Option 003 with an IF BW of 10 Hz 9 Press 4AVG5 NNNNNNNNNNNNNNNNN IF BW 415 405 4x15 to change t...

Page 65: ...l Test Setup 1 14 Press 4MENU5 NNNNNNNNNNNNNNNNN POWER 405 4x15 4MENU5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNN SINGLE 15 When the sweep is nished press 4DISPLAY5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEMORY 4DATA MEM5 Connect the equipment as shown in Figure 2 9 Figure 2 9 Transmission Test Port Input Noise Floor Level Test Setup 2 System Veri cation and Perfo...

Page 66: ...Test Record 22 of 28 Noise Floor Level at 3 GHz to 6 GHz Option 006 with IF BW of 3 kHz 19 Press 4AVG5 NNNNNNNNNNNNNNNNN IF BW 435 4k m5 20 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NUMBER of GROUPS 455 4x15 21 When the sweeps are nished record the mean value as shown on the analyzer display Repeat step 18 In case of di cult...

Page 67: ...3 Equipment Calibration kit 75 type N HP 85036B Cable 75 type N 24 inch HP P N 8120 2408 Warm up time one hour Description This test determines the HP 8752C Option 075 or HP 8752C Options 075 and 003 transmission test port input noise oor level It is tested at 0 dBm at two di erent IF bandwidths Procedure Noise Floor Level at 300 kHz to 1 3 GHz Option 075 or 300 kHz to 3 GHz Options 075 and 003 wi...

Page 68: ...e 2 11 Transmission Test Port Input Noise Floor Level Test Setup 2 5 If your analyzer has Option 004 press 4MENU5 NNNNNNNNNNNNNNNNN POWER 405 485 455 4x15 4FORMAT5 NNNNNNNNNNNNNNNNNNNNNNN LIN MAG 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTOSCALE If your analyzer does not have Option 004 installed press 4MENU5 NNNNNNNNNNNNNNNNN POWER 405 425 405 4x15 4FORMAT5 NNNNNNNNNNNNNNNNNNNNNNN LIN MAG 4SCAL...

Page 69: ... 300 kHz to 1 3 GHz Option 075 or 300 kHz to 3 GHz Options 075 and 003 with an IF BW of 10 Hz 10 Press 4AVG5 NNNNNNNNNNNNNNNNN IF BW 415 405 4x15 to change the IF bandwidth to 10 Hz 11 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNN SINGLE 12 When the sweep is done record its mean value Use the equation Power dBm 20 flog10 linear magnitude mean value g to conv...

Page 70: ...P 8752C with Option 003 and 075 Equipment For analyzers without Option 075 Calibration kit 50 type N HP 85032B For analyzers with Option 075 Calibration kit 75 type N HP 85036B Warm up time one hour Description This test veri es the signal leakage interference between the analyzer re ection and transmission test ports The system crosstalk is checked by driving the re ection test port and measuring...

Page 71: ...5 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AVERAGING ON 3 Press 4MKR FCTN5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MRK SEARCH ON NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRACKING ON NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SEARCH MAX 4 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NUMBER of GROUPS 455 4x15 5 When the analyzer nishes swe...

Page 72: ... the analyzer display on the appropriate table in the Performance Test Record Test Port Crosstalk for an HP 8752C with Option 075 1 Press 4PRESET5 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRANSMISSN To set the test port power to 0 dBm press 4MENU5 NNNNNNNNNNNNNNNNN POWER 405 4x15 2 Press 4SCALE REF5 425 455 4x15 4AVG5 NNNNNNNNNNNNNNNNN IF BW 415 405 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN...

Page 73: ...e table in the Performance Test Record 6 To verify the analyzer system crosstalk in the extended frequency range press 4START5 415 4 5 435 4G n5 4STOP5 435 4G n5 7 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NUMBER of GROUPS 455 4x15 8 When the analyzer is done sweeping record the marker value as shown in the upper right hand ...

Page 74: ...Option 003 3 HP 8752C with Option 006 Equipment For analyzers without Option 075 Calibration kit 50 type N HP 85032B Cable 50 type N 24 inch HP P N 8120 4781 For analyzers with Option 075 Calibration kit 75 type N HP 85036B Cable 75 type N 24 inch HP P N 8120 2408 Warm up time one hour Description This test measures the system trace noise at a designated CW frequency in both the transmission and r...

Page 75: ...4G n5 Otherwise refer to the following table and choose a CW frequency according to the speci ed option s Description CW Frequency HP 8752C with Option 003 3 GHz HP 8752C with Option 006 6 GHz HP 8752C with Option 075 1 3 GHz HP 8752C with Options 075 and 003 2 GHz 4 To get a better view of the system trace noise press 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTOSCALE 5 Press 4MKR FCTN5 NNNNNNNN...

Page 76: ...NNNNNNNNNNNNNNNNNNN NUMBER of GROUPS 455 4x15 10 When the measurement is nished record the s dev standard deviation value on the Performance Test Record Transmission Trace Noise Magnitude 11 Connect the equipment as shown in Figure 2 14 Figure 2 14 Transmission Trace Noise Test Setup 12 To switch to the transmission mode press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRANSMISSN 13 Press 4MENU5 NNNN...

Page 77: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NUMBER of GROUPS 455 4x15 17 When the measurement is done record the s dev standard deviation value on the Performance Test Record In case of di culty 1 Replace the A10 digital IF board assembly Rerun the test System Veri cation and Performance Tests 2 39 ...

Page 78: ... attenuator HP 8496A Adapter N m to N m HP P N 1250 1528 50 2 way power splitter HP 11667A Cable 50 type N 24 inch 3 required HP P N 8120 4781 Additional equipment required for analyzers with Option 075 50 to 75 minimum loss pad 2 required HP 11852B Warm up time 1 hour 2 40 System Veri cation and Performance Tests ...

Page 79: ...and 4TUNED RF LEVEL5 Press 4LOG LIN5 to have the HP 8902A display linear readings dBm Press 435 425 4 5 415 4SPCL5 2 Set the HP 8496A to 20 dB 3 On the analyzer press 4PRESET5 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 435 405 4M 5 Press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NUMBER of POINTS 455 415 4x15 Press 4AVG5 NNNNNNNNNNNNNNNNN IF BW 415 405 4x15 4 Connect the equipment as shown ...

Page 80: ...Figure 2 15 Magnitude Dynamic Accuracy Test Setup 2 42 System Veri cation and Performance Tests ...

Page 81: ... MARKER MODE MENU NNNNNNNNNNNNNNNNNNNNNNNNNN STATS ON 9 Set the HP 8496A to 10 dB 10 On the analyzer press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNN SINGLE 11 Record the mean value as shown on the analyzer s display in the Trans Port column of the Performance Test Record 12 Record the HP 8902A readout in the HP 8902A column of the Performance Test Record 13 Ca...

Page 82: ...CAL is shown on the measuring receiver display 3 If this test fails at lower power levels a refer to the Correction Constants and Adjustments chapter i perform the IF Ampli er Correction Constants test ii perform the ADC O set Correction Constants test iii repeat this performance test b If it still fails i replace the A10 digital IF assembly ii perform the IF Ampli er Correction Constants test iii...

Page 83: ...quipment There are no external equipment requirements to perform this test Description This test veri es the phase dynamic accuracy of the analyzer s transmission port The test is performed at a CW frequency of 30 MHz System Veri cation and Performance Tests 2 45 ...

Page 84: ...te A using the following formula A 10 Magnitude Dynamic Accuracy Value 20 3 Write the result in the A column of the Performance Test Record 4 For every Trans Input Power calculate B using the following formula B 1 0 A 5 Write the result in the B column of the Performance Test Record 6 For every Trans Input Power calculate the phase dynamic accuracy using the following formula Phase Dynamic Accurac...

Page 85: ...2C or HP 8752C Option 003 or HP 8752C Option 006 Cable 50 type N 24 inch HP P N 8120 4781 HP 8752C Option 075 Cable 75 type N 24 inch HP P N 8120 2408 Warm up time 1 hour Description This test veri es the compression expansion levels of the analyzer s transmission test port sampler Due to their frequency dependent characteristics the compression test is performed at selected CW frequencies System ...

Page 86: ...NNNNNNNNN SINGLE 7 At the end of the sweep press 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTOSCALE 8 Press 4MKR FCTN5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MKR SEARCH NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SEARCH MAX 9 Press 4MKR5 NNNNNNNNNNNNNNNNNNNNNNNNNN MARKER 2 4MKR FCTN5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MKR SEARCH NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SEARCH MIN 10 Press 4MKR5 NNNNNNNNNNNNNNNNNNNNNN...

Page 87: ...NNNNN LOG MAG 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 415 4G n5 18 Press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRIGGER MENU NNNNNNNNNNNNNNNNNNNN SINGLE At the end of the sweep press 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTOSCALE 19 Press 4MKR5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MARKER 1 REF 1 4MKR FCTN5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MKR SEARCH NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ...

Page 88: ...tion Date Customer s Name Performed by Model HP 8752C Serial No Option s Firmware Revision Ambient Temperature C Relative Humidity Test Equipment Used Description Model Number Trace Number Cal Due Date Frequency Counter Power Meter Power Sensor Calibration Kit Notes Comments 2 50 System Veri cation and Performance Tests ...

Page 89: ...tainty MHz 0 3 0 299 997 0 300 003 6 0 000 000 360 5 0 4 999 950 5 000 050 6 0 000 006 16 0 15 999 840 16 000 160 6 0 000 019 31 0 30 999 690 31 000 310 6 0 000 037 60 999 999 60 999 390 61 000 610 6 0 000 073 121 0 120 998 790 121 001 210 6 0 000 145 180 0 179 998 200 180 001 800 6 0 000 216 310 0 309 995 900 310 003 100 6 0 000 372 700 0 699 930 000 700 007 000 6 0 000 840 1 300 0 1 299 987 000 ...

Page 90: ...360 5 0 4 999 950 5 000 050 6 0 000 006 16 0 15 999 840 16 000 160 6 0 000 019 31 0 30 999 690 31 000 310 6 0 000 037 60 999 999 60 999 390 61 000 610 6 0 000 073 121 0 120 998 790 121 001 210 6 0 000 145 180 0 179 998 200 180 001 800 6 0 000 216 310 0 309 995 900 310 003 100 6 0 000 372 700 0 699 930 000 700 007 000 6 0 000 840 1 300 0 1 299 987 000 1 300 013 6 0 001 560 2 000 0 1 999 980 000 2 0...

Page 91: ...00 160 6 0 000 019 31 0 30 999 690 31 000 310 6 0 000 037 60 999 999 60 999 390 61 000 610 6 0 000 073 121 0 120 998 790 121 001 210 6 0 000 145 180 0 179 998 200 180 001 800 6 0 000 216 310 0 309 995 900 310 003 100 6 0 000 372 700 0 699 930 000 700 007 000 6 0 000 840 1 300 0 1 299 987 000 1 300 013 6 0 001 560 2 000 0 1 999 980 000 2 000 020 000 6 0 002 400 3 000 0 2 999 970 000 3 000 030 000 6...

Page 92: ...rtainty MHz 0 3 0 299 997 0 300 003 6 0 000 000 360 5 0 4 999 950 5 000 050 6 0 000 006 16 0 15 999 840 16 000 160 6 0 000 019 31 0 30 999 690 31 000 310 6 0 000 037 60 999 999 60 999 390 61 000 610 6 0 000 073 121 0 120 998 790 121 001 210 6 0 000 145 180 0 179 998 200 180 001 800 6 0 000 216 310 0 309 995 900 310 003 100 6 0 000 372 700 0 699 930 000 700 007 000 6 0 000 840 1 300 0 1 299 987 000...

Page 93: ... 000 360 5 0 4 999 950 5 000 050 6 0 000 006 16 0 15 999 840 16 000 160 6 0 000 019 31 0 30 999 690 31 000 310 6 0 000 037 60 999 999 60 999 390 61 000 610 6 0 000 073 121 0 120 998 790 121 001 210 6 0 000 145 180 0 179 998 200 180 001 800 6 0 000 216 310 0 309 995 900 310 003 100 6 0 000 372 700 0 699 930 000 700 007 000 6 0 000 840 1 300 0 1 299 987 000 1 300 013 6 0 001 560 2 000 0 1 999 980 00...

Page 94: ...er O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 300 kHz 0 20 0 15 6 0 5 6 0 13 0 18 0 13 6 0 5 6 0 20 0 16 0 11 6 0 5 6 0 16 0 14 0 9 6 0 2 6 0 14 0 12 0 7 6 0 2 6 0 13 0 10 0 5 6 0 2 6 0 13 0 8 0 3 6 0 2 6 0 20 0 6 0 1 6 0 2 6 0 16 0 4 0 01 6 0 2 6 0 14 0 2 0 03 6 0 2 6 0 13 0 0 05 6 0 5 6 0 13 2 0 07 6 0 5 6 0 20 4 0 09 6 0 5 6 0 16 5 0 010 6 0 5 6 0 ...

Page 95: ...lts Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 1 3 GHz 020 0 15 60 5 60 23 018 0 13 60 5 60 15 016 0 11 60 5 60 01 014 0 9 60 2 60 06 012 0 7 60 2 60 07 010 0 5 60 2 60 09 08 0 3 60 2 60 06 06 0 1 60 2 60 03 04 0 01 60 2 60 02 02 0 03 60 2 60 01 0 0 05 60 5 60 09 2 0 07 60 5 60 06 4 0 09 60 5 60 03 5 0 010 60 5 60 03 System Veri cati...

Page 96: ...dBm Results Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 3 0 GHz 020 0 15 60 5 60 23 018 0 13 60 5 60 15 016 0 11 60 5 60 01 014 0 9 60 2 60 06 012 0 7 60 2 60 07 010 0 5 60 2 60 09 08 0 3 60 2 60 06 06 0 1 60 2 60 03 04 0 01 60 2 60 02 02 0 03 60 2 60 01 0 0 05 60 5 60 09 2 0 07 60 5 60 06 4 0 09 60 5 60 03 5 0 010 60 5 60 03 2 58 Sys...

Page 97: ... dBm Results Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 6 0 GHz 020 0 15 60 5 60 23 018 0 13 60 5 60 15 016 0 11 60 5 60 01 014 0 9 60 2 60 06 012 0 7 60 2 60 07 010 0 5 60 2 60 09 08 0 3 60 2 60 06 06 0 1 60 2 60 03 04 0 01 60 2 60 02 02 0 03 60 2 60 01 0 0 05 60 5 60 09 2 0 07 60 5 60 06 4 0 09 60 5 60 03 5 0 010 60 5 60 03 System ...

Page 98: ...dBm Results Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 300 kHz 020 0 15 60 5 60 13 018 0 13 60 5 60 20 016 0 11 60 5 60 16 014 0 9 60 2 60 14 012 0 7 60 2 60 13 010 0 5 60 2 60 13 08 0 3 60 2 60 20 06 0 1 60 2 60 16 04 0 01 60 2 60 14 02 0 03 60 2 60 13 0 0 05 60 5 60 13 2 0 07 60 5 60 20 4 0 09 60 5 60 16 5 0 010 6 0 5 60 15 2 60 Sy...

Page 99: ...Bm Results Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 1 3 GHz 020 0 15 60 5 60 13 018 0 13 60 5 60 20 016 0 11 60 5 60 16 014 0 9 60 2 60 14 012 0 7 60 2 60 13 010 0 5 60 2 60 13 08 0 3 60 2 60 20 06 0 1 60 2 60 16 04 0 01 60 2 60 14 02 0 03 60 2 60 13 0 0 05 60 5 60 13 2 0 07 6 0 5 60 20 4 0 09 6 0 5 60 16 5 0 010 6 0 5 60 15 System...

Page 100: ...tings dBm Results Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 2 GHz 020 0 15 60 5 60 13 018 0 13 60 5 60 20 016 0 11 60 5 60 16 014 0 9 60 2 60 14 012 0 7 60 2 60 13 010 0 5 60 2 60 13 08 0 3 60 2 60 20 06 0 1 60 2 60 16 04 0 01 60 2 60 14 02 0 03 60 2 60 13 0 0 05 60 5 60 13 2 0 07 60 5 60 20 4 0 09 60 5 60 16 5 0 010 60 5 60 15 2 62...

Page 101: ...tion 004 Power Range dBm Power Level Value dB Speci cation dB Mean Value dB Measurement Uncertainty dB 015 to 10 010 0 61 0 60 100 025 to 0 020 0 61 5 60 060 035 to 010 030 0 61 7 60 050 045 to 020 040 0 61 9 60 050 055 to 030 050 0 62 2 60 055 065 to 040 060 0 62 5 60 080 075 to 050 070 0 62 8 60 200 085 to 060 080 0 63 1 60 565 System Veri cation and Performance Tests 2 63 ...

Page 102: ...s Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 300 kHz 0 15 0 10 6 0 2 6 0 06 0 12 0 7 6 0 2 6 0 07 0 10 0 5 6 0 2 6 0 09 0 8 0 3 6 0 2 6 0 06 0 6 0 1 6 0 2 6 0 03 0 4 0 01 6 0 2 6 0 02 0 2 0 03 6 0 2 6 0 01 0 0 05 6 0 5 6 0 09 2 0 07 6 0 5 6 0 06 4 0 09 6 0 5 6 0 03 5 0 010 6 0 5 6 0 03 10 0 015 6 0 5 6 0 03 2 64 System Veri cation an...

Page 103: ...s Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 1 3 GHz 0 15 0 10 6 0 2 6 0 06 0 12 0 7 6 0 2 6 0 07 0 10 0 5 6 0 2 6 0 09 0 8 0 3 6 0 2 6 0 06 0 6 0 1 6 0 2 6 0 03 0 4 0 01 6 0 2 6 0 02 0 2 0 03 6 0 2 6 0 01 0 0 05 6 0 5 6 0 09 2 0 07 6 0 5 6 0 06 4 0 09 6 0 5 6 0 03 5 0 010 6 0 5 6 0 03 10 0 015 6 0 5 6 0 03 System Veri cation and Per...

Page 104: ...ts Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 3 GHz 0 15 0 10 6 0 2 6 0 06 0 12 0 7 6 0 2 6 0 07 0 10 0 5 6 0 2 6 0 09 0 8 0 3 6 0 2 6 0 06 0 6 0 1 6 0 2 6 0 03 0 4 0 01 6 0 2 6 0 02 0 2 0 03 6 0 2 6 0 01 0 0 05 6 0 5 6 0 09 2 0 07 6 0 5 6 0 06 4 0 09 6 0 5 6 0 03 5 0 010 6 0 5 6 0 03 10 0 015 6 0 5 6 0 03 2 66 System Veri cation and...

Page 105: ...Results Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 6 GHz 0 15 0 10 6 0 2 6 0 06 0 12 0 7 6 0 2 6 0 07 0 10 0 5 6 0 2 6 0 09 0 8 0 3 6 0 2 6 0 06 0 6 0 1 6 0 2 6 0 03 0 4 0 01 6 0 2 6 0 02 0 2 0 03 6 0 2 6 0 01 0 0 05 6 0 5 6 0 09 2 0 07 6 0 5 6 0 06 4 0 09 6 0 5 6 0 03 5 0 010 6 0 5 6 0 03 10 0 015 6 0 5 6 0 03 System Veri cation and...

Page 106: ...esults Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 300 kHz 0 15 0 10 6 0 2 6 0 14 0 12 0 7 6 0 2 6 0 13 0 10 0 5 6 0 2 6 0 13 0 8 0 3 6 0 2 6 0 20 0 6 0 1 6 0 2 6 0 16 0 4 0 01 6 0 2 6 0 14 0 2 0 03 6 0 2 6 0 13 0 0 05 6 0 5 6 0 13 2 0 07 6 0 5 6 0 20 4 0 09 6 0 5 6 0 16 5 0 010 6 0 5 6 0 15 8 0 013 6 0 5 6 0 15 2 68 System Veri catio...

Page 107: ...esults Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 1 3 GHz 0 15 0 10 6 0 2 6 0 14 0 12 0 7 6 0 2 6 0 13 0 10 0 5 6 0 2 6 0 13 0 8 0 3 6 0 2 6 0 20 0 6 0 1 6 0 2 6 0 16 0 4 0 01 6 0 2 6 0 14 0 2 0 03 6 0 2 6 0 13 0 0 05 6 0 5 6 0 13 2 0 07 6 0 5 6 0 20 4 0 09 6 0 5 6 0 16 5 0 010 6 0 5 6 0 15 8 0 013 6 0 5 6 0 15 System Veri cation and...

Page 108: ...m Results Measured dB Power O set dB Power Level Linearity dB Speci cation dB Measurement Uncertainty dB CW Frequency 2 GHz 0 15 0 10 6 0 2 6 0 14 0 12 0 7 6 0 2 6 0 13 0 10 0 5 6 0 2 6 0 13 0 8 0 3 6 0 2 6 0 20 0 6 0 1 6 0 2 6 0 16 0 4 0 01 6 0 2 6 0 14 0 2 0 03 6 0 2 6 0 13 0 0 05 6 0 5 6 0 13 2 0 07 6 0 5 6 0 20 4 0 09 6 0 5 6 0 16 5 0 010 6 0 5 6 0 15 8 0 013 6 0 5 6 0 15 2 70 System Veri cati...

Page 109: ... Frequency Range IF BW Speci cation dBm Calculated Value Measurement Uncertainty dB HP 8752C Standard ONLY 300 kHz to 1 3 GHz 3 kHz 0 90 N A 300 kHz to 1 3 GHz 10 Hz 0 110 N A HP 8752C Option 003 ONLY 300 kHz to 3 GHz 3 kHz 0 90 N A 300 kHz to 3 GHz 10 Hz 0 110 N A HP 8752C Option 006 ONLY 3 GHz to 6 GHz 3 kHz 085 N A 3 GHz to 6 GHz 10 Hz 0105 N A System Veri cation and Performance Tests 2 71 ...

Page 110: ...ort Input Noise Floor Level HP 8752C with Option 075 Frequency Range IF BW Spec dBm Calculated Value Measurement Uncertainty dB 300 kHz to 1 3 GHz 3 kHz 0 90 N A 300 kHz to 1 3 GHz 10 Hz 0 110 N A HP 8752C Options 075 and 003 ONLY 300 kHz to 3 GHz 3 kHz 0 90 N A 300 kHz to 3 GHz 10 Hz 0 110 N A 2 72 System Veri cation and Performance Tests ...

Page 111: ...asurement Uncertainty dB Standard HP 8752C 300 kHz to 1 3 GHz 0100 dB N A HP 8752C Option 003 ONLY 300 kHz to 3 0 GHz 0100 dB N A HP 8752C Option 006 ONLY 300 kHz to 3 0 GHz 0100 dB N A 3 0 GHz to 6 0 GHz 0100 dB N A HP 8752C Option 075 ONLY 300 kHz to 1 3 GHz 0100 dB N A HP 8752C Options 003 and 075 ONLY 300 kHz to 1 3 GHz 0100 dB N A 1 3 GHz to 3 0 GHz 097 dB N A System Veri cation and Performan...

Page 112: ...ms N A Transmission Magnitude 3 kHz 0 006 dB rms N A Transmission Phase 3 kHz 0 038 rms N A HP 8752C Option 006 ONLY Re ection Magnitude 3 kHz 0 010 dB rms N A Re ection Phase 3 kHz 0 070 rms N A Transmission Magnitude 3 kHz 0 010 dB rms N A Transmission Phase 3 kHz 0 070 rms N A HP 8752C Option 075 ONLY Re ection Magnitude 3 kHz 0 006 dB rms N A Re ection Phase 3 kHz 0 038 rms N A Transmission Ma...

Page 113: ...rans Port Input Power dB HP 8496A Setting dB Trans Port dB HP 8902A dB Measured Value dB Spec dB Meas Uncer dB 020 10 0 058 60 02 030 20 0 050 60 02 040 30 0 050 60 04 050 40 0 053 60 06 060 50 0 060 60 08 070 60 0 115 60 14 080 70 0 285 60 16 090 80 0 860 60 18 0100 90 2 500 60 20 0110 100 5 400 60 20 System Veri cation and Performance Tests 2 75 ...

Page 114: ... 9 Phase Dynamic Accuracy Trans Port Input Power dB Magnitude Dynamic Accuracy Value A B Calculated Value degrees Spec degrees Meas Uncert 020 0 46 N A 030 0 35 N A 040 0 36 N A 050 0 38 N A 060 0 40 N A 070 0 70 N A 080 1 90 N A 090 6 00 N A 0100 18 00 N A 0110 55 00 N A 2 76 System Veri cation and Performance Tests ...

Page 115: ...l HP 8752C Report Number Serial Number Date 7 7 10 Compression CW Freq GHz Magnitude Value dB Spec dB Meas Uncert Phase Value degrees Spec degrees Meas Uncer dB 0 05 0 45 N A 4 2 N A 1 00 0 45 N A 4 2 N A 1 30 0 45 N A 4 2 N A System Veri cation and Performance Tests 2 77 ...

Page 116: ......

Page 117: ...replaced or if one or more of the analyzer s performance tests failed Keep Correction Constants Current to Save Time Keep the correction constants current by performing 15 EEPROM Backup Disk Procedure any time you perform one or more of the correction constant adjustment procedures Then if you need to replace the A9 assembly you can quickly retrieve the data from the back up disk rather than regen...

Page 118: ...Constants Test 46 7 RF Output Power Correction Constants Test 47 8 Source Pretune Correction Constants Test 48 9 Display Intensity Adjustments Test 49 10 IF Ampli er Correction Constants Test 51 11 ADC O set Correction Constants Test 52 12 Frequency Response Correction Constants Tests 57 then 53 13 Cavity Oscillator Correction Constants Test 54 14 Serial Number Correction Constant Test 55 15 Optio...

Page 119: ...Correction Constants Test 52 19 Fractional N Frequency Range Adjustment 6 Source Pretune Correction Constants Test 48 20 Frequency Accuracy Adjustment 21 High Low Band Transition Adjustment 22 Fractional N Spur and FM Sideband Adjustment 23 Source Spur Avoidance Tracking Adjustment 5 RF Output Power Correction Constants Test 47 8 IF Ampli er Correction Constants Test 51 11 Cavity Oscillator Correc...

Page 120: ...er s adjustment procedures only the top cover needs to be removed to adjust the A9CC jumper position To remove the top cover 1 Remove the upper rear stando s 2 Loosen the top cover retaining screw 3 Slide back the cover 3 4 Adjustments and Correction Constants ...

Page 121: ...on constants you must move the A9 CC jumper to the ALT alter position The analyzer is shipped and should be operated with the A9 CC jumper in the NRM normal position Procedure Caution Switch o the analyzer s line power before removing or installing assemblies Adjustments and Correction Constants 3 5 ...

Page 122: ...Figure 3 1 Location of Major Assemblies 3 6 Adjustments and Correction Constants ...

Page 123: ...gure 3 2 NRM Normal and ALT Alter Positions of A9 CC Jumper 4 Move the A9 CC jumper to the ALT position Refer to Figure 3 2 5 Reinstall the A9 assembly and run the correction constant routine s 6 Return the A9 CC jumper to the NRM position see 1 A9 CC Jumper Position Procedure Note Update the EEPROM backup disk by performing 15 EEPROM Backup Disk Procedure at the end of this chapter Adjustments an...

Page 124: ...ALT position see 1 A9 CC Jumper Position Procedure 2 Press 4PRESET5 3 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4445 4x15 When the display shows Source Def ND press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST 4 Press NNNNNNNNNNN YES at the query to alter the correction constants 5 When complete DONE should appear on the display 6 Refer to 15...

Page 125: ...ress 4PRESET5 3 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4455 4x15 4 When the analyzer displays Pretune Def press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST 5 Press NNNNNNNNNNN YES at the query to alter the correction constants and observe the display If Pretune Def DONE is displayed the adjustment is complete Refer to 15 EEPROM Backup Dis...

Page 126: ...NNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4465 4x15 When the display shows ABUS Cor press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST and then press NNNNNNNNNNN YES at the query to alter the correction constants and observe the display ABUS COR DONE displayed the adjustment is complete Refer to 15 EEPROM Backup Disk Procedure to store the new correction constants Return the A9 CC...

Page 127: ... HP 438A Power sensor HP 8482A HP 8483A Option HO3 Use HP 8481A Option 006 above 4 2 GHz Warm up time 30 minutes Description and Procedure Several correction constants improve the output power level accuracy of the internal source They relate to power level power slope power slope o set and ALC roll o factors 1 Put the A9 CC jumper in the ALT position see 1 A9 CC Jumper Position Procedure 2 Press ...

Page 128: ...r connect the HP 8482A power sensor to channel A and the HP 8481A power sensor to channel B Power Sensor Calibration Factor Entry 7 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TEST OPTIONS NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN LOSS SENSR LISTS NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN CAL FACTOR SENSOR A t...

Page 129: ... at the prompt to alter the correction constants 12 When prompted connect the equipment as shown in Figure 3 3 13 Follow the instructions on the screen and press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE You can reposition the marker as many times as required to achieve the attest line If there is no appreciable rollo position the marker at the highest frequency Press NNNNNNNNNNNNNNNNNNNN SELECT to sele...

Page 130: ...splays Pretune Cor press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST Press NNNNNNNNNNN YES at the query to alter the correction constants and observe the display Pretune Cor DONE displayed the adjustment is complete and can be tested by pressing 4PRESET5 and again observing the display Normal operation observed the adjustment is complete Refer to 15 EEPROM Backup Disk Procedure to store th...

Page 131: ... default Perform these adjustments when either the A19 GSP A9 CPU or A18 display assemblies are replaced as indicated in Assembly Replacement and Post Repair Procedures Note This procedure should be performed with a photometer and only by quali ed service personnel Background Adjustment 1 Put the A9 CC jumper in the ALT position see 1 A9 CC Jumper Position Procedure 2 In a dimly lit room or with t...

Page 132: ...tical bars of three di erent intensities will be drawn on the display Each bar has a number written below it either 0 1 or 2 6 Adjust the analyzer s RPG knob until the vertical bar labeled 1 is just barely visible against the black border Vertical bar 0 must not be visible Maximum Intensity Adjustment This adjustment ensures that the light output at the 100 intensity level is equal to or less than...

Page 133: ...mum clockwise position If the photometer registers greater than 150 NITs turn the RPG knob until a reading of no more than 150 NITs registers on the photometer without the bezel 90 NITS with the bezel If the photometer registers a reading of less than 150 NITs and greater than 100 NITs proceed to the next step If the photometer registers a reading of less than 100 NITs the display is faulty Note T...

Page 134: ...analyzer s display as shown in Figure 3 4 Adjust the analyzer s RPG knob until the photometer registers 100 NITs of output light if the glass bezel assembly is not installed Adjust for 60 NITs if the glass bezel is installed 12 Press the top softkey on the analyzer and observe the display If DONE is displayed the adjustment is complete Refer to 15 EEPROM Backup Disk Procedure to store the new corr...

Page 135: ... 8120 4781 Pad attenuator N A HP 8491A Option 020 50 75 min loss pad 2 N A HP 11852B Warm up time 30 minutes Description and Procedure Figure 3 5 IF Ampli er Correction Constant Setup These correction constants compensate for possible discontinuities of signals greater than 030 dBm Adjustments and Correction Constants 3 19 ...

Page 136: ...evice from the re ection port Press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE 7 At the prompt connect the attenuator and RF cable as shown in Figure 3 5 Press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE 8 If DONE is displayed the adjustment is complete Refer to 15 EEPROM Backup Disk Procedure to store the new correction constants Return the A9 CC jumper to the NRM position see 1 A9 CC Jumper Position Procedure ...

Page 137: ... SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4525 4x15 When the analyzer displays ADC Ofs Cor press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST 4 Press NNNNNNNNNNN YES at the query to alter the correction constants Observe the display ADC Ofs Cor DONE displayed the adjustment is complete Refer to 15 EEPROM Backup Disk Procedure to store the new correction constants Return the A9 CC jumper to the ...

Page 138: ...laced this procedure should be performed again to keep the correction constants current 1 Put the A9 CC jumper in the ALT position see 1 A9 CC Jumper Position Procedure 2 Press 4PRESET5 3 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4575 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST NNNNNNNNNNN YES 4 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNN...

Page 139: ... 20 seconds 10 Connect the RF cable between the re ection and transmission test ports 11 Press NNNNNNNNNNNNNN THRU 12 After the analyzer underlines THRU on the display press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN DONE RESPONSE 13 When the procedure is nished look at the display If DONE is displayed this procedure is complete Store the new correction constants to disk Refer to 15 EEPROM Backu...

Page 140: ...135 0198 RF cable HP PN 8120 4781 HP PN 8120 4781 50 to 75 minimum loss pad 2 N A HP 11852B APC 3 5 f to type N m adapter 1250 1744 1250 1744 APC 3 5 m to type N f adapter 1250 1750 1250 1750 Warm up time 30 minutes Description and Procedure Figure 3 6 Cavity Oscillator Frequency Correction Constant Setup 3 24 Adjustments and Correction Constants ...

Page 141: ...ss 4PRESET5 4 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4545 4x15 5 When the analyzer displays Cav Osc Cor press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST Then press NNNNNNNNNNN YES at the query to alter the correction constants Note During this adjustment routine you will see several softkeys NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE sweeps the...

Page 142: ... the lter not recommended it will be one of four or ve less distinct spurs as shown in Figure 3 9 Figure 3 10 and Figure 3 11 When the center frequency increases to 2994 999 MHz and you have not targeted the selected spur Cav Osc Cor FAIL appears on the display 8 If you are con dent that you found the target spur continue with step 9 lter procedure or step 11 lterless procedure Otherwise repeat st...

Page 143: ...e display DONE appears the procedure has been performed successfully Refer to 15 EEPROM Backup Disk Procedure to store the new correction constants If ND not done is displayed repeat this procedure Refer to Source Troubleshooting if ND is still displayed Adjustments and Correction Constants 3 27 ...

Page 144: ...onally it will be nearly impossible to identify Press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE as many times as necessary to thoroughly inspect the current span Without the lter the target spur usually appears as one of a group of four evenly spaced spurs as in Figure 3 9 The target spur is the right most spur fourth from the left On any particular sweep any or all of the spurs may be large small visib...

Page 145: ...purs without Filter On occasion the target spur appears as one of a group of ve evenly spaced spurs as in Figure 3 10 The target spur is again the fourth from the left not the fth right most spur Adjustments and Correction Constants 3 29 ...

Page 146: ...al Display of Five Spurs without Filter Figure 3 11 shows another variation of the basic four spur pattern some up some down and the target spur itself almost indistinguishable 3 30 Adjustments and Correction Constants ...

Page 147: ...the display DONE appears the procedure has been performed successfully Refer to 15 EEPROM Backup Disk Procedure to store the new correction constants Return the A9 CC jumper to the NRM position see 1 A9 CC Jumper Position Procedure If ND not done is displayed repeat this procedure Refer to Source Troubleshooting if ND is still displayed Adjustments and Correction Constants 3 31 ...

Page 148: ...ress 4DISPLAY5 NNNNNNNNNNNNNN MORE NNNNNNNNNNNNNNNNN TITLE NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ERASE TITLE to erase the HP logo Rotate the RPG knob to position the arrow below each character of the analyzer serial number and press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SELECT LETTER to enter each in turn Enter a total of ten characters four digits one letter and ve nal digits Press NNNNNNNNNNNN...

Page 149: ... To check the serial number recognized by the analyzer press 4PRESET5 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN FIRMWARE REVISION The analyzer displays the new serial number SER NO If not repeat steps 3 through 6 8 Refer to 15 EEPROM Backup Disk Procedure to store the new correction constants Return the A9 CC jumper to the NR...

Page 150: ...3 Option Numbers Correction Constant Test 56 Equipment No equipment is required for this adjustment Warm up time 5 minutes Figure 3 12 Location of Keyword Label 3 34 Adjustments and Correction Constants ...

Page 151: ...on the display see Figure 3 12 The label has one keyword for each option installed in the analyzer If the analyzer lacks a label call your local HP Sales and Service o ce to obtain the keyword s Be prepared to tell the service engineer the analyzer s full serial number and the options about to be installed on the analyzer 3 Press 4PRESET5 4 Press 4DISPLAY5 NNNNNNNNNNNNNN MORE NNNNNNNNNNNNNNNNN TIT...

Page 152: ...to install the remaining options Refer to 15 EEPROM Backup Disk Procedure to store the new correction constants 7 Return the A9 CC jumper to the NRM position see 1 A9 CC Jumper Position Procedure Option 004 Installation 1 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNN PEEK POKE NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PEEK POKE ADDRESS...

Page 153: ...r s error correction constants If you have the correction constants backed up on a disk refer to the EEPROM Backup Disk Procedure If you don t have the correction constants backed up on a disk run all the internal service routines in the following order Source Default Correction Constants Test 44 Source Pretune Correction Constants Test 45 Analog Bus Correction Constants Test 46 RF Output Power Co...

Page 154: ...h each analyzer This disk is a record of the calibration constants CCs stored in EEPROM on the A9 CPU assembly It allows you to replace the A9 CPU board assembly without having to rerun all of the correction constant adjustment procedures Take care of the supplied EEPROM Calibration Data Disk If you don t have the original make a backup disk and keep it current Store the correction constant data t...

Page 155: ...cted disk is in place If the disk is not initialized press 4SAVE RECALL5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN FILE UTILITIES NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN FORMAT DISK NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN FORMAT EXT DISK NNNNNNNNNNN YES 6 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MODES NNNNNNNNNNNNNN...

Page 156: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SELECT DISK NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN CONFIGURE EXT DISK Set the disk address disk unit number and volume number to 0 8 Press 4SAVE RECALL5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SELECT DISK NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXTERNAL DISK Note If the analyzer does not toggle to NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXTERNA...

Page 157: ...13 Return the A9 CC jumper to the NRM position see 1 A9 CC Jumper Position Procedure In case of di culty refer to the chapter titled Start Troubleshooting Here Adjustments and Correction Constants 3 41 ...

Page 158: ...T position see 1 A9 CC Jumper Position Procedure 2 Press 4PRESET5 3 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNN PEEK POKE NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PEEK POKE ADDRESS 426218085 4x15 NNNNNNNNNNNNNN POKE 415 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN RESET MEMORY 4PRESET5 4 To verify that the procedure was successful...

Page 159: ...and focus can be adjusted in the eld this includes both customers and service centers These adjustments are optional and should rarely be required Caution Any other adjustments to the display will void the warranty Vertical Position Adjustment 1 To access vertical and focus adjustments controls remove the side panel nearest to the display Adjustments and Correction Constants 3 43 ...

Page 160: ...crew driver at least 2 inches long into the vertical position hole See Figure 3 14 3 Adjust the control until the softkey labels are aligned with the softkeys Focus Adjustment 4 Use the same screwdriver to adjust the focus until the display is the most readable 3 44 Adjustments and Correction Constants ...

Page 161: ...served If this problem is observed remove the device causing the magnetic eld Should the display become magnetized or if color purity is a problem cycle the power several times Leave the analyzer o for at least 30 seconds before switching it on This will activate the automatic degaussing circuitry in the display If this is insu cient to achieve color purity use a commercially available demagnetize...

Page 162: ...4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG BUS ON 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN Aux Input 4295 4x15 to observe the FN VCO Tune voltage Press 4SCALE REF5 4 65 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN REFERENCE VALUE 4075 4x15 to set and scale channel 1 5 Press 4MKR5 to set t...

Page 163: ...E Adjustment Location 7 Observe the analyzer display for the results of the adjustment a Refer to Figure 3 15 If the marker value is less than 7 the adjustment procedure is complete Adjustments and Correction Constants 3 47 ...

Page 164: ...eadjust FN VCO ADJ to 7 refer to Figure 3 14 Perform steps 2 through 7 to con rm that the channel 1 and channel 2 markers respectively are still above and below the reference line c If the adjustment cannot be performed correctly replace the A14 board assembly 3 48 Adjustments and Correction Constants ...

Page 165: ...BNC m adapter HP PN 1250 0077 Frequency counter HP 5343A Option 075 analyzers only Warm up time 30 minutes Figure 3 17 Re ection Test Port Output Frequency Accuracy Adjustment Setup Note For 75 analyzers insert an HP 11852B 50 to 75 minimum loss pad and adapters between frequency counter port and type N cable Adjustments and Correction Constants 3 49 ...

Page 166: ...ET5 3 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 4505 4M u5 and note the frequency Frequency 50 MHz 6500 Hz no adjustment is required To adjust the frequency locate the A12 assembly red extractors and adjust VCXO ADJ see Figure 3 18 for a frequency counter reading of 50 MHz 6500 Hz 4 If you are unable to adjust the frequency as speci ed replace the A12 assembly Figure 3 18 VCXO ADJ Adjustment Lo...

Page 167: ...OG BUS ON 4START5 4115 4M u5 4STOP5 4215 4M u5 to observe part of both the low and high bands on the analog bus 4 Press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN Aux Input 4225 4x15 4DISPLAY5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEM NNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEM to subtract the ground voltage from the next measurement 5 Press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNN...

Page 168: ...E see Figure 3 20 to position the left half of the trace to 06125 mV Then adjust HBLB to position the right half of the trace 125 to 175 mV about 1 1 2 divisions higher than the left half Figure 3 20 High Low Band Adjustments Locations 3 52 Adjustments and Correction Constants ...

Page 169: ...SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG BUS ON 4START5 4115 4M u5 4STOP5 4215 4M u5 to observe part of both the low and high bands on the analog bus f Press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN Aux Input 4225 4x15 4DISPLAY5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEM NNNNNNNNNNNNNNNNNNNNNNNNNN DATA MEM to subtract the ground voltage from the...

Page 170: ...0980 Static control Table Mat and Earth Ground Wire HP P N 9300 0797 50 to 75 Minimum Loss Pad HP 11852B Option 075 analyzers only Warmup time 30 minutes Description and Procedure This adjustment minimizes the spurs caused by the API analog phase interpolator on the fractional N assembly circuits It also improves the sideband characteristics 1 Connect the equipment as shown in Figure 3 21 2 Make s...

Page 171: ...r Avoidance and FM Sideband Adjustment Setup 3 Set the spectrum analyzer measurement parameters as follows Reference Level 0 dBm Resolution Bandwidth 100 Hz Center Frequency 676 145105 MHz Adjustments and Correction Constants 3 55 ...

Page 172: ...4M 5 8 Adjust the API1 R35 for a null minimum amplitude on the spectrum analyzer 9 On the spectrum analyzer set the center frequency for 676 007515 MHz 10 On the HP 8752C press 4CENTER5 4676 0045155 4M 5 11 Adjust the API2 R43 for a null minimum amplitude on the spectrum analyzer 12 On the spectrum analyzer set the center frequency for 676 003450 MHz 13 On the HP 8752C press 4CENTER5 4676 000455 4...

Page 173: ...47 for a null minimum amplitude on the spectrum analyzer In Case of Di culty 18 If this adjustment cannot be performed satisfactorily repeat the entire procedure If the adjustment is still unattainable replace the A13 board assembly Adjustments and Correction Constants 3 57 ...

Page 174: ...nd the cavity oscillator when they are frequency o set to avoid spurs Optimizing YO cavity oscillator tracking minimizes uctuations in the phase locked loop 1 Mate a BNC alligator clip to the BNC cable and connect the BNC end to AUX INPUT on the rear panel Connect the alligator clip to A11TP10 labeled ERR Connect the shield clip to A11TP1 GND shown in Figure 3 23 Figure 3 23 A11 Test Point and A3 ...

Page 175: ... REF5 4105 4k m5 4MKR FCTN5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MARKER REFERENCE to observe the phase locked loop error voltage If spikes are not visible on the display see Figure 3 24 no adjustment is necessary If spikes are excessive see Figure 3 24 adjust the CAV ADJ potentiometer see Figure 3 23 on the A3 source bias assembly to eliminate the spikes 5 Refer to Start Troublesh...

Page 176: ......

Page 177: ...is at fault Locate the speci c troubleshooting procedures to identify the assembly or peripheral at fault To identify the portion of the analyzer at fault follow these procedures Step 1 Initial Observations Step 2 Con dence Test Step 3 HP IB System Check Step 4 Faulty Group Isolation Start Troubleshooting Here 4 1 ...

Page 178: ...e Adjustments and Correction Constants chapter 5 Perform the necessary performance tests Refer to the System Veri cation and Performance Tests chapter Having Your Analyzer Serviced If your analyzer should fail any of the following checks call the nearest HP sales or service o ce for assistance See the table titled Hewlett Packard Sales and Service O ces in Chapter 15 If your analyzer needs to be r...

Page 179: ...rder shown in Figure 4 1 to determine if the analyzer is operating correctly Figure 4 1 LED Power up Sequence If the Self Test Failed 1 Check the AC line power to the analyzer 2 Check the fuse rating listed on rear panel spare inside holder 3 Check the line voltage setting use small screwdriver to change 4 If the problem persists refer to Step 4 Faulty Group Isolation Start Troubleshooting Here 4 ...

Page 180: ...the test data to automatically print continue with step 2 If you want to have the test data automatically print press 4PRESET5 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TEST OPTIONS NNNNNNNNNNNNNNNNNNNNNNNNNNNNN RECORD ON Note When using an InkJet printer the analyzer must be set to the standard print mode through the 4COPY5 menu 2 Press 4S...

Page 181: ...NNN CONTINUE again The analyzer now displays the result of the con dence test If the test failed It could be due to loose connections Tighten all connections and repeat the Con dence Test It could be due to a bad frequency response correction Run service test 53 It could be due to a faulty RF cable Run the cable con dence test service test 22 or replace the cable Run the veri cation procedure test...

Page 182: ... ports as prompted on the analyzer 4 Press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE and notice the PASS FAIL result If the cable passes the test press NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE again and move the cable gently in all possible directions to see if it stays within the limits If the cable fails the test replace the cable Refer to Step 4 Faulty Group Isolation in this chapter if the problem persis...

Page 183: ...DDRESSES and the appropriate softkeys to verify that the device addresses will be recognized by the analyzer The factory default addresses are Device HP IB Address HP 8752C 16 Plotter port HP IB 5 Printer port HP IB 1 Disk external 0 Controller 21 Power meter HP IB 13 Note You may use other addresses with two provisions Each device must have its own address The address set on each device must matc...

Page 184: ...alyzer display suspect the HP IB function of the analyzer refer to the Digital Control Troubleshooting chapter If Using an External Disk Drive 1 Select the external disk drive Press 4SAVE RECALL5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SELECT DISK NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXTERNAL DISK 2 Verify that the address is set correctly Press 4LOCAL5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN S...

Page 185: ...ng the preceding checks indicates that the analyzer s peripheral functions are normal Therefore if the analyzer has not been operating properly with an external controller suspect the controller Check the following Compatibility of controller must be HP 9000 series 200 300 Refer to the Service Equipment and Analyzer Options chapter HP IB interface hardware is installed Refer to the manual Installi...

Page 186: ...digital control source receiver Descriptions of these groups are provided in the Theory of Operation chapter The checks in the following pages must be performed in the order presented If one of the procedures fails it is an indication that the problem is in the functional group checked Go to the troubleshooting information for the indicated group to isolate the problem to the defective assembly Fi...

Page 187: ...ed LED should be o The lower green LED should be on Figure 4 3 A15 Preregulator LEDs Check the A8 Post Regulator LEDs Remove the analyzer s top cover Inspect the green LEDs along the top edge of the A8 post regulator assembly All green LEDs should be on The fan should be audible In case of di culty refer to the Power Supply Troubleshooting chapter Start Troubleshooting Here 4 11 ...

Page 188: ...ould take place within a few seconds On the front panel observe the following 1 All six amber LEDs illuminate 2 The amber LEDs go o after a few seconds except the CH 1 LED See Figure 4 4 The display should come up bright and focused Figure 4 4 Front Panel Power up Sequence 4 12 Start Troubleshooting Here ...

Page 189: ... to the Digital Control Troubleshooting chapter If the analyzer indicates failure but does not identify the test press 4 5 to search for the failed test For a description of the failed test refer to the Service Key Menus chapter Then refer to the Digital Control Troubleshooting chapter Likewise if the response to front panel or HP IB commands is unexpected troubleshoot the digital control group 2 ...

Page 190: ...tely 020 dBm 085 dBm for Option 004 5 Press 4165 4M 5 to change the CW frequency to 16 MHz The power meter should read approximately 020 dBm throughout the analyzer s frequency range Repeat checking the frequency at 1 GHz intervals up to the maximum frequency of the analyzer 6 Press NNNNNNNNNNNNNNNNN POWER 455 4x15 to increase the output power to 5 dBm 10 dBm for Option 004 7 Step through the freq...

Page 191: ...cted results refer to the Receiver Troubleshooting chapter Figure 4 6 Typical Measurement Trace Accessories Check If the analyzer has passed all of the above checks but is still making incorrect measurements an accessory could be faulty RF cables interconnect cables and calibration kit devices can all induce system problems Recon gure the system to its normal state and recon rm the problem If the ...

Page 192: ...4 16 Start Troubleshooting Here ...

Page 193: ......

Page 194: ...Figure 4 7 HP 8752C Overall Block Diagram 2 of 4 Option 003 and 004 Start Troubleshooting Here 4 19 ...

Page 195: ...Figure 4 7 HP 8752C Overall Block Diagram 3 of 4 Option 006 4 20 Start Troubleshooting Here ...

Page 196: ...Figure 4 7 HP 8752C Overall Block Diagram 4 of 4 Option 004 and 006 Start Troubleshooting Here 4 21 ...

Page 197: ......

Page 198: ...e appears on the display refer to Error Messages near the end of this chapter the fan is not working refer to Fan Troubleshooting in this chapter The power supply group assemblies consist of the following A8 post regulator A15 preregulator All assemblies however are related to the power supply group because power is supplied to each assembly Power Supply Troubleshooting 5 1 ...

Page 199: ...es the faulty assembly 2 Order a replacement assembly Refer to the Replaceable Parts chapter 3 Replace the faulty assembly and determine what adjustments are necessary Refer to the Assembly Replacement and Post Repair Procedures chapter 4 Perform the necessary adjustments Refer to the Adjustments and Correction Constants chapter 5 Perform the necessary performance tests Refer to the System Veri ca...

Page 200: ...mpli ed block diagram form Refer to the detailed block diagram of the power supply Figure 5 8 located at the end of this chapter to see voltage lines and speci c connector pin numbers Figure 5 1 Power Supply Group Simpli ed Block Diagram Power Supply Troubleshooting 5 3 ...

Page 201: ...elector switch see Figure 5 2 During normal operation the bottom green LED is on and the top red LED is o If these LEDs are normal then A15 is 95 veri ed Continue with Check the Green LEDs on A8 If the green LED is not on steadily refer to If the Green LED on A15 is not On Steadily in this procedure If the red LED is on or ashing refer to If the Red LED On A15 is On in this procedure Figure 5 2 Lo...

Page 202: ...e on there is a 95 con dence level that the power supply is veri ed To con rm the last 5 uncertainty of the power supply refer to Measure the Post Regulator Voltages next If any LED on the A8 post regulator is o or ashing refer to If the Green LEDs On A8 are not All On in this chapter Measure the Post Regulator Voltages Measure the DC voltages on the test points of A8 with a voltmeter Refer to Fig...

Page 203: ...y Range 1 65V 64 6 to 65 4 2 AGND n a 3 5 VD 4 9 to 5 3 4 SDIS n a 5 015V 014 4 to 015 6 6 012 6 VPP probe power 012 1 to 012 8 7 15V 14 5 to 15 5 8 5 VU 5 05 to 5 35 9 05 2 V 05 0 to 05 4 10 22V 21 3 to 22 7 11 6V 5 8 to 6 2 5 6 Power Supply Troubleshooting ...

Page 204: ...tor switch setting and actual line voltage to see that they are all correct Figure 5 4 shows how to remove the line fuse using a small at bladed screwdriver to pry out the fuse holder Figure 5 2 shows the location of the line voltage selector switch 2 Use a small at bladed screwdriver to select the correct switch position If the A15 green LED is still not on steadily replace A15 Figure 5 4 Removin...

Page 205: ... from the A8 post regulator see Figure 5 5 3 Switch on the analyzer and observe the red LED on A15 If the red LED goes out the problem is probably the A8 post regulator Continue with Verify the A15 Preregulator to rst verify that the inputs to A8 are correct If the red LED is still on the problem is probably the A15 preregulator or one of the assemblies obtaining power from it Continue with Check ...

Page 206: ...oltages to the A8 post regulator Use a voltmeter with a small probe to measure the output voltages of A15W1 s plug Refer to Table 5 2 and Figure 5 6 If the voltages are not within tolerance replace A15 If the voltages are within tolerance A15 is veri ed Continue with Check for a Faulty Assembly Power Supply Troubleshooting 5 9 ...

Page 207: ...8 4 18V 5 6 022 4 to 033 6 017 0 to 018 4 018V 7 N C N C N C 8 9 4 to 14 7 4 to 8 0 8 V 9 10 09 4 to 014 06 7 to 07 3 08 V 11 32 to 48 24 6 to 26 6 25V 12 N C N C N C NOTE The 5VD supply must be loaded by one or more assemblies at all times or the other voltages will not be correct It connects to motherboard connector A17J3 Pin 4 5 10 Power Supply Troubleshooting ...

Page 208: ...a faulty assembly that might be shutting down the A15 preregulator via one of the following lines also refer to Figure 5 1 the A15W1 cable connected to the A8 post regulator the 5VCPU line through the motherboard the 5VDIG line through the motherboard Power Supply Troubleshooting 5 11 ...

Page 209: ...r Procedures chapter Refer to the Replaceable Parts chapter to identify speci c cables and assemblies that are not shown in this chapter If the red LED goes out the particular assembly removed or one receiving power from it is faulty If the red LED is still on after you have checked all of the assemblies listed in Table 5 3 continue with Check the Operating Temperature Table 5 3 Recommended Order ...

Page 210: ... end of this procedure If there does not appear to be a temperature problem it is likely that A15 is faulty Inspect the Motherboard If the red LED is still on after replacement or repair of A15 switch o the analyzer and inspect the motherboard for solder bridges and other noticeable defects Use an ohmmeter to check for shorts The 5VD 5VCPU or 5VDSENSE lines may be bad Refer to the block diagram Fi...

Page 211: ...ny green LEDs other than 5VD are still o or ashing continue with Check the A8 Fuses and Voltages If all LEDs are now on steadily except for the 5VD LED the A15 preregulator and A8 post regulator are working properly and the trouble is excessive loading somewhere after the motherboard connections at A8 Continue with Remove the Assemblies Check the A8 Fuses and Voltages Check the fuses along the top...

Page 212: ...nnect W14 A18W1 and W20 4 Switch on the analyzer and observe the green LEDs on A8 If any of the green LEDs are o or ashing it is not likely that any of the assemblies listed above is causing the problem Continue with Brie y Disable the Shutdown Circuitry If all green LEDs are now on one or more of the above assemblies may be faulty Continue with next step 5 Switch o the analyzer 6 Reconnect W14 an...

Page 213: ...step you shutdown the protective circuitry for a short time and the supplies are forced on including shorted supplies with a 100 duty cycle Caution Damage to components or to circuit traces may occur if A8TP4 SDIS is shorted to chassis ground for more than a few seconds 1 Switch o the analyzer 2 Connect A8TP4 SDIS to chassis ground with a jumper wire 3 Switch on the analyzer and notice the LEDs th...

Page 214: ... lists any associated assemblies that recieve power by the assembly that is being removed After each assembly is removed or disconnected switch on the analyzer and observe the LEDs Note Always switch o the analyzer before removing or disconnecting assemblies When extensive disassembly is required refer to the Assembly Replacement and Post Repair Procedures chapter Refer to the Replaceable Parts ch...

Page 215: ...ler Remove from Card Cage None 4 A5 A Sampler Remove from Card Cage None 5 A6 B Sampler Remove from Card Cage None 6 A2 Front Panel Interface Disconnect W17 A1 Front Panel Keyboard 7 A16 Rear Panel Interface Disconnect A16W1 None Inspect the Motherboard Inspect the A17 motherboard for solder bridges and shorted traces In particular inspect the traces that carry the supplies whose LEDs faulted when...

Page 216: ...supplies on A8 have been shut down Check the temperature of the operating environment it should not be greater than 55 C 131 F The fan should be operating and there should be at least 15 cm 6 in spacing behind and all around the analyzer to allow for proper ventilation PROBE POWER SHUT DOWN The front panel RF probe biasing supplies are shut down due to excessively drawb current These supplies are ...

Page 217: ...nd 012 6V green LEDs on A8 If the LEDs are on there is an open between the A8 assembly and the front panel probe power connectors Put A8 onto an extender board and measure the voltages at the following pins A8P2 pins 6 and 36 012 6 volts A8P2 pins 4 and 34 15 volts If the LEDs are o continue with Check the Fuses and Isolate A8 5 20 Power Supply Troubleshooting ...

Page 218: ...8J2 3 Connect a jumper wire from A8TP2 to chassis ground If either the 15V or 012 6V fuse blows or the associated green LEDs do not light replace A8 If the 15V and 012 6V green LEDs light troubleshoot for a short between the motherboard connector pins XA8P2 pins 6 and 36 012 6V and the front panel probe power connectors Also check between motherboard connector pins XA8P2 pins 4 and 34 15V and the ...

Page 219: ...ut changes the voltage to the fan depending on air ow and temperature information Its voltage ranges from approximately 01 0 volts to 14 7 volts and connects to the A17 motherboard via pin 31 of the A8P1 connector 2 Measure the voltages of these supplies while using an extender board to allow access to the PC board connector A8P1 Short A8TP3 to Ground 1 If there is no voltage at A8P1 pins 31 and 3...

Page 220: ...hout pressing 4PRESET5 typically signal a power supply or A9 CPU problem Since the A9 CPU assembly is the easiest to substitute do so If the problem ceases replace the A9 If the problem continues replace the A15 preregulator assembly Power Supply Troubleshooting 5 23 ...

Page 221: ...5 24 Power Supply Troubleshooting ...

Page 222: ......

Page 223: ...the order given unless instructed otherwise If you suspect an HP IB interface problem refer to HP IB Failures at the end of this chapter The digital control group assemblies consist of the following A1 front panel keyboard A2 front panel interface A9 CPU A10 digital IF A16 rear panel A18 display A19 GSP Digital Control Troubleshooting 6 1 ...

Page 224: ...s the faulty assembly 2 Order a replacement assembly Refer to the Replaceable Parts chapter 3 Replace the faulty assembly and determine what adjustments are necessary Refer to the Assembly Replacement and Post Repair Procedures chapter 4 Perform the necessary adjustments Refer to the Adjustments and Correction Constants chapter 5 Perform the necessary performance tests Refer to the System Veri cat...

Page 225: ...Digital Control Group Block Diagram Figure 6 1 Digital Control Group Block Diagram Digital Control Troubleshooting 6 3 ...

Page 226: ...r normal operating conditions To move the jumper to the NRM position do the following 1 Unplug the analyzer 2 Remove the top cover 3 Remove the A9 CPU board 4 Move the jumper to the NRM position Refer to Figure 6 2 5 Replace the A9 CPU board top cover and power cord Figure 6 2 Jumper Positions on the A9 CPU 6 4 Digital Control Troubleshooting ...

Page 227: ...power Cycle the power on the analyzer and observe the four red LEDs All four LEDs should be on after power up If the four LEDs did not illuminate replace the A9 CPU after verifying the power supply 2 Hold in the preset key Press and hold down the 4PRESET5 key while observing the four LEDs on A9 The far left LED should be o See Figure 6 3 Figure 6 3 Location of Four LEDs on A9 CPU Digital Control T...

Page 228: ... right LED remained on go to Check A19 GSP and A18 Display Operation If the right LED does not remain on replace the A9 CPU assembly and repeat the three LED pattern checks If the LEDs are held in any one of the patterns shown in Table 6 1 and have the corresponding error message replace the A9 rmware ICs Firmware ICs are not separately replaceable Replacement kits are listed in the Replaceable Pa...

Page 229: ...If this does not resolve the problem refer to A19 GSP and A18 Display Troubleshooting located later in this chapter A1 A2 Front Panel Troubleshooting Check Front Panel LEDs After Preset 1 Press 4PRESET5 on the analyzer 2 Observe that all front panel LEDs turn on and within ve seconds after releasing 4PRESET5 all but the CH1 LED turns o Refer to Figure 6 4 If all the front panel LEDs either stay on...

Page 230: ...ce Identify the Stuck Key Match the LED pattern with the patterns in Table 6 2 The LED pattern identi es the stuck key Free the stuck key or replace the front panel part causing the problem 6 8 Digital Control Troubleshooting ...

Page 231: ...ftkey 8 softkey 5 Softkey 9 495 Entry 10 4G n5 Entry 11 4CH 15 Active Channel 12 4CH 25 Active Channel 13 485 Entry 14 475 Entry 15 softkey 1 Softkey 16 4STOP5 Stimulus 17 4SAVE RECALL5 Instrument State 18 4SEQ5 Instrument State 19 4MENU5 Stimulus 20 4START5 Stimulus 21 4COPY5 Instrument State 22 4SYSTEM5 Instrument State 23 softkey 6 Softkey 24 4SCALE REF5 Response 25 465 Entry Digital Control Tr...

Page 232: ...7 4 5 Entry 38 4LOCAL5 Instrument State 39 softkey 7 Softkey 40 47 Not used 48 4 5 Entry 49 405 Entry 50 4215 Entry 51 4MKR5 Response 52 4MKR FCTN5 Response 53 4 5 Entry 54 405 Entry 55 softkey 4 Softkey Inspect Cables Remove the front panel assembly and visually inspect the ribbon cable that connects the front panel to the motherboard Also inspect the interconnecting ribbon cable between A1 and A...

Page 233: ...ts can be run as part of one or both major test sequences all internal test 0 and preset test 1 1 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 405 4215 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST to perform All INT tests 2 Then press 415 4215 to see the results of the preset test If either sequence fails press the 4 5 4 5 keys to nd the rst occ...

Page 234: ...heck analog bus node 17 for 1 MHz If correct A12 is veri ed suspect A10 11 DSP Control P AI A10 A9 Most likely A10 12 Fr Pan Wr Rd A2 A1 A9 Run test 23 If fail replace A2 If pass problem is on bus between A9 and A2 or on A9 assembly 13 Rear Panel AI A16 A9 Disconnect A16 and check A9J2 pin 48 for 4 MHz clock signal If OK replace A16 If not replace A9 14 Post reg P AI A15 A8 Destination assembly Re...

Page 235: ...wer supply voltages on the A19 GSP assembly Check pins 2 4 and 6 on A19J5 for 65 60 4 V see Figure 6 5 If the voltages are incorrect continue with the next check If the voltages are correct go to Run Display Test 59 later in this chapter Figure 6 5 Pin Locations on A19J5 Digital Control Troubleshooting 6 13 ...

Page 236: ... and 2 on the connector of W14 for 65 60 4 V and pin 6 for 5 16 60 1 V see Figure 6 6 If the voltages are incorrect refer to the Power Supply Troubleshooting chapter If the voltages are correct entering but incorrect leaving the GSP assembly replace the A19 GSP assembly Figure 6 6 Pin Locations on Connector of W14 6 14 Digital Control Troubleshooting ...

Page 237: ...If all of the LEDs go o and the display remains blank the analyzer passed the test If the analyzer passes the test press 4PRESET5 and go to Run display Tests 60 65 If any of the front panel LEDs remain on except for the port LEDs the analyzer failed the test Continue with the next check Inspect Ribbon Cable Repeat Display Test 59 1 Inspect the W20 A9 A19 ribbon cable for a loose connection 2 Repea...

Page 238: ...the cable The walking one pattern see Figure 6 7 is found on pins 3 through 10 and 13 through 20 on the connector of W20 see Figure 6 8 If the signal is not present at the end of the cable check for it at the A9 connector of the ribbon cable If the signal is still not present replace the A9 assembly Figure 6 7 A9 CPU Walking One Pattern 6 16 Digital Control Troubleshooting ...

Page 239: ... panel LEDs will ash once 3 Press 4PRESET5 and perform display tests 61 through 65 substitute the next test number where 4605 was used Watch for the LEDs to go o and the display to blank except for test 65 Test 65 causes the display to dim rather than blank If any of the display tests fail replace the A19 assembly If all of the following is true replace the A18 display assembly CPU test passes the...

Page 240: ...art Troubleshooting Here chapter and you suspect there is an HP IB problem in the analyzer perform the following test It checks the internal communication path between the A9 CPU and the A16 rear panel It does not check the HP IB paths external to the analyzer Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4135 4215 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN...

Page 241: ...s for the following problems Incorrect power levels Perform the Power troubleshooting checks Phase lock error Perform the Phase Lock Error troubleshooting checks The source group assemblies consist of the following A3 source A4 sampler mixer A7 pulse generator A11 phase lock A12 reference A13 fractional N analog A14 fractional N digital Source Troubleshooting 7 1 ...

Page 242: ...ce the faulty assembly and determine what adjustments are necessary Refer to the Assembly Replacement and Post Repair Procedures chapter 4 Perform the necessary adjustments Refer to the Adjustments and Correction Constants chapter 5 Perform the necessary performance tests Refer to the System Veri cation and Performance Tests chapter Before You Start Troubleshooting Make sure all of the assemblies ...

Page 243: ... if the analyzer fails the checks replace the source 2 RF Output Power Correction Constants Test 47 1 Follow the instructions for this procedure given in the Adjustments and Correction Constants chapter The procedure is complete when DONE appears on the analyzer display 2 Use a power meter to verify that power levels are now correct If power levels are incorrect or if the analyzer fails the routin...

Page 244: ...ndix and should be used to troubleshoot phase lock problems The equipment setup shown in Figure 7 1 can be used throughout this chapter Phase Lock Loop Error Message Check Phase lock error messages may appear as a result of incorrect pretune correction constants To check this possibility perform the pretune correction constants routine The four phase lock error messages listed below are described ...

Page 245: ...on a Unplug the analyzer b Remove the top cover c Remove the A9 CPU board d Move the jumper to the ALT position Refer to Figure 7 2 e Replace the A9 CPU board top cover and power cord Figure 7 2 Jumper Positions on the A9 CPU Source Troubleshooting 7 5 ...

Page 246: ...NNNNNNNNNN YES to generate new pretune correction constants Note Always press 4PRESET5 before and after performing an adjustment test 5 Press 4PRESET5 and observe the analyzer display If no error message is displayed restore the A9 CC jumper to the NRM position Then refer to Post Repair Procedures in the Assembly Replacement and Post Repair Procedures chapter to verify operation If an error messag...

Page 247: ...NNNNNNNNNNNNN REFLECTION A6 connect a cable between the re ection and transmission test ports and press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TRANSMISSN 3 Ignore the displayed trace but check for phase lock error messages If the phase lock problem persists the R channel sampler is not the problem Source Troubleshooting 7 7 ...

Page 248: ...NNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MODES NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SRC ADJUST MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SRC TUNE ON NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SRC TUNE FREQ to activate the source tune SRC TUNE service mode 3 Use the front panel knob or front panel keys to set the pretune frequency to 300 kH...

Page 249: ... Integrity in SRC Tune Mode 6 The signal observed on the spectrum analyzer will appear jittery as in Figure 7 5b not solid as in Figure 7 5a This is because in SRC TUNE mode the output is not phase locked Figure 7 5 Phase Locked Output Compared to Open Loop Output in SRC Tune Mode Source Troubleshooting 7 9 ...

Page 250: ...he frequency changes are incorrect continue with YO Coil Drive Check with Analog Bus If the power output changes are incorrect check analog bus node 3 a Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG BUS ON 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN Aux Input 4FORMAT5 NNNNNNNNNNNNNN MORE NNNNNNNN...

Page 251: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN Aux Input NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN COUNTER ANALOG BUS 2 Then press 4165 4215 4FORMAT5 NNNNNNNNNNNNNN MORE NNNNNNNNNNNNNN REAL 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTOSCALE This keystroke sequence lets you check the pretune DAC and the A11 output to the YO coil drive by monitoring the 1V GHz signal at ...

Page 252: ...NNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MODES NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SOURCE PLL OFF to operate the analyzer in a swept open loop mode 3 Monitor the two YO coil drive lines In source tune mode the voltage di erence should vary from approximately 3 5 to 5 0 volts as shown in Figure 7 7 If the voltages are incorrect replace the faulty A11 assembly ...

Page 253: ...NNNNNNNNNNNNNNN ANALOG IN Aux Input NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG BUS to switch on the analog bus and its counter 2 Press 4215 4215 to count the frequency of the 100 kHz signal 3 Press 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 45005 4k m5 Verify that the counter reading displayed on the analyzer next to cnt matches the corresponding 100 kHz value for the CW frequency Refer to Table 7 2 4 Ve...

Page 254: ...tches the corresponding PLREF value for the CW frequency Refer to Table 7 2 10 Verify the remaining CW frequencies comparing the counter reading with the value in Table 7 2 a Press 425 4M 5 b Press 4505 4M 5 11 Check the results If all the counter readings match the frequencies listed in Table 7 2 continue with A13 A14 Fractional N Check If the counter readings are incorrect at the 500 kHz and 2 M...

Page 255: ...s listed Table 7 3 A12 Reference Frequencies Mnemonic Signal Description Test Point Location See Figure Analyzer Setting FN100kHzREF 100 kHz Reference A13TP5 Figure 7 8 any REF Phase Lock Reference A11TP1 PIN 9 Figure 7 9 16 MHz CW REF Phase Lock Reference A11TP1 PIN 9 Figure 7 10 5 MHz CW FN LO Fractional N LO A14J2 Figure 7 11 10 MHz CW 4MHz REF 4 MHz Reference A12TP9 Figure 7 12 any 2ND LO 0 Se...

Page 256: ...z pulses are very narrow and typically 1 5V in amplitude You may have to increase the oscilloscope intensity to see these pulses See Figure 7 8 Figure 7 8 Sharp 100 kHz Pulses at A13TP5 any frequency 7 16 Source Troubleshooting ...

Page 257: ...locked to this signal Use an oscilloscope to observe the signal at the frequencies noted in Figure 7 9 and Figure 7 10 High Band REF Signal In high band the REF signal is a constant 1 MHz square wave as indicated by Figure 7 9 Figure 7 9 High Band REF Signal 16 MHz CW Source Troubleshooting 7 17 ...

Page 258: ...ency of the RF output signal Figure 7 10 illustrates a 5 MHz CW signal Figure 7 10 REF Signal at A11TP9 5 MHz CW If REF looks correct continue with 4 MHz Reference Signal If REF is incorrect in low band continue with FN LO at A12 Check 7 18 Source Troubleshooting ...

Page 259: ...NNNNNNNNNNNNNNNNNNNNNNNNNNN FRACN TUNE ON to switch on the fractional N service mode 2 Use the front panel knob to vary the frequency from 30 to 60 MHz The signal should appear similar to Figure 7 11 The display will indicate 10 to 60 8 MHz If the FN LO signal is correct the A12 assembly is faulty If the FN LO signal is incorrect continue with A13 A14 Fractional N Check Figure 7 11 Typical FN LO W...

Page 260: ...trol the receiver If faulty this signal can cause apparent source problems because the CPU uses receiver data to control the source At A12TP9 it should appear similar to Figure 7 12 Figure 7 12 4 MHz Reference Signal at A12TP9 Preset 7 20 Source Troubleshooting ...

Page 261: ... 3 for convenient test points 90 Degree Phase O set of 2nd LO Signals in High Band In high band the 2nd LO is 996 kHz As indicated by Figure 7 13 the 2nd LO actually consists of two signals 90 degrees out of phase Figure 7 13 90 Degree Phase O set of High Band 2nd LO Signals 16 MHz CW Source Troubleshooting 7 21 ...

Page 262: ...gnals track the RF output with a 4 kHz o set Figure 7 14 In Phase Low Band 2nd LO Signals 14 MHz CW If any of the signals of Table 7 2 are incorrect the probability is 90 that the A12 assembly is faulty Either consider the A12 assembly faulty or perform the A12 Digital Control Signals Check described next 7 22 Source Troubleshooting ...

Page 263: ...Digital Control Signals Mnemonic Signal Description Location See Figure Analyzer Setting L ENREF L Reference Enable A12P2 16 Figure 7 15 Preset L HB L High Band A12P2 32 Figure 7 16 Preset L LB L Low Band A12P1 23 Figure 7 16 Preset L ENREF Line This is a TTL signal To observe it trigger on the negative edge In preset state the signal should show activity similar to Figure 7 15 Figure 7 15 L ENREF...

Page 264: ...log bus method should su ce unless problems are detected Fractional N Check with Analog Bus 1 Press 4PRESET5 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG BUS ON 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN Aux Input NNNNNNNNNNNNNNNNNNNN FRAC N to switch on the analog bus and the fractional N counter 2 ...

Page 265: ...dicated If the readings are within the limits speci ed the probability is greater than 90 that the fractional N assemblies are functional Either continue with the A7 Pulse Generator Check or perform the more conclusive A14 VCO Range Check with Oscilloscope described below If the readings fail the speci ed limits perform the A14 VCO Exercise Source Troubleshooting 7 25 ...

Page 266: ...NNNNNNNNNNNNNNNNNNNN FRACN TUNE ON to activate the FRACN TUNE service mode See the Service Key Menus and Error Messages chapter for more information on the FRACN TUNE mode 3 Vary the fractional N VCO frequency with the front panel knob and check the signal with the oscilloscope The waveform should resemble Figure 7 17 Figure 7 18 and Figure 7 19 If the fractional N output signals are correct conti...

Page 267: ...Figure 7 18 25 MHz HI OUT Waveform from A14J1 Figure 7 19 60 MHz HI OUT Waveform from A14J1 Source Troubleshooting 7 27 ...

Page 268: ...d switch on the instrument 3 Prepare to monitor the VCO frequency either by Activating the analog bus and setting the internal counter to the FRACN node or Connecting an oscilloscope to A14J2 labeled LO OUT and looking for waveforms similar to Figure 7 20 Figure 7 20 LO OUT Waveform at A14J2 4 Vary the voltage at A14TP14 from 10 to 05 volts either by Connecting an appropriate external power supply...

Page 269: ...as in the A14 VCO Exercise that the VCO oscillates at approximately 50 to 55 MHz 2 Put the analyzer in CW mode to avoid relock transitions and activate the FRACN TUNE service mode 3 Connect an oscilloscope to A14J3 and observe the output 4 With the FRACN TUNE service feature vary the frequency from 30 MHz to 60 8 MHz 5 The period of the observed signal should vary from 5 5 s to 11 s If this proced...

Page 270: ...gnals in Table 7 6 Since these TTL signals are generated by A14 to control A13 check them at A13 rst Place A13 on the large extender board The signals should look similar to Figure 7 21 If these signals are correct the A13 assembly is defective Table 7 6 A14 to A13 Digital Control Signal Locations Mnemonic A13 Location A14 Location CST none TP3 L FNHOLD P2 2 P2 2 FNBIAS P2 5 P2 5 API1 P2 32 P2 32 ...

Page 271: ...Figure 7 21 A14 Generated Digital Control Signals Source Troubleshooting 7 31 ...

Page 272: ...ce of Figure 7 22 shows relative inactivity of this signal during preset condition The lower trace shows its status during a 16 MHz to 31 MHz sweep with inactivity during retrace only Figure 7 22 H MB Signal at A14P1 5 Preset and 16 MHz to 31 MHz Sweep 7 32 Source Troubleshooting ...

Page 273: ...nerator Check with Spectrum Analyzer 1 Remove the A7 to A6 SMB cable W7 from the A7 pulse generator assembly Set the analyzer to generate a 16 MHz CW signal Connect the spectrum analyzer to the A7 output connector and observe the signal The A7 comb should resemble the spectral display in Figure 7 23 Figure 7 23 Pulse Generator Output Source Troubleshooting 7 33 ...

Page 274: ...mbly a On the network analyzer press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MODES NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PLL AUTO OFF Otherwise do not readjust the instrument Remove the A14 to A7 SMB cable W9 from the A7 pulse generator assembly CW 16 MHz b Set the spectrum analyzer to a center frequency of 45 MHz and a span o...

Page 275: ...ator Check with Oscilloscope Perform this check if a spectrum analyzer is not available 1 Remove the A4 to A11 SMB cable from the A4 R sampler mixer output Connect the oscilloscope to the A4 output 1st IF 2 Activate the FRACN TUNE service mode and tune the fractional N to 50 MHz Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MOD...

Page 276: ...e Lock Check If the signals observed are questionable use a spectrum analyzer to perform the preceding A7 Pulse Generator Check with Spectrum Analyzer Table 7 7 1st IF Waveform Settings SRC TUNE FRACN Harmonic 1st IF 50 MHz 50 MHz 1 1 to 6 MHz 250 MHz 50 MHz 5 1 to 6 MHz 2550 MHz 50 MHz 51 1 to 6 MHz Figure 7 26 Typical 1st IF Waveform in FRACN TUNE SRC TUNE Mode 7 36 Source Troubleshooting ...

Page 277: ...routines Follow the steps there to determine in which state the phase lock is lost If NO IF FOUND is displayed con rm that the analog bus is functional and perform the Source Pretune Correction Constants Test 48 as outlined in the Adjustments and Correction Constants chapter If phase lock is lost in the ACQUIRE state the A11 assembly is faulty If phase lock is lost in the TRACK state troubleshoot ...

Page 278: ... A11P1 2 32 Figure 7 7 Use SOURCE PLL OFF YO COIL 0 O A11P1 1 31 Figure 7 7 1ST IF I A11 PL IF IN Figure 7 26 Check for 1 MHz with tee a A11 jack not at cable end in high band Figure 7 27 FM Coil Plot with 3 Point Sweep 4 If any of the input signal is not correct refer to the overall block diagram in the Start Troubleshooting Here chapter as an aid to trouble shooting the problem to its source 5 I...

Page 279: ...ck Error Messages All phase lock error messages can result from improper front panel connections NO IF FOUND CHECK R INPUT LEVEL means no IF was detected during pretune a source problem Perform the A4 Sampler Mixer Check NO PHASE LOCK CHECK R INPUT LEVEL means the IF was not acquired after pretune a source problem Perform the A4 Sampler Mixer Check earlier in this chapter PHASE LOCK CAL FAILED mea...

Page 280: ...e and subsweep number are displayed on the analyzer display See Service modes menu in the Service Key Menus and Error Messages chapter for more information 3 Press NNNNNNNNNNNNNNNNNNNNNNNNNNNNN PLL PAUSE to pause the phase lock sequence and determine where the source is trying to tune when lock is lost Refer to Source theory in the Theory of Operation chapter for additional information regarding b...

Page 281: ... Start Troubleshooting Here chapter Follow the procedures in the order given unless instructed otherwise The receiver group assemblies consist of the following A4 5 6 sampler mixer assemblies A10 digital IF assembly A30 dual directional coupler Receiver Troubleshooting 8 1 ...

Page 282: ...pter Receiver Failure Error Messages There are two error messages that indicate receiver group problems These messages may be caused by the analyzer itself or by external devices or connections An explanation of each error message follows CAUTION OVERLOAD ON REFL PORT POWER REDUCED You have exceeded approximately 20 dBm at the re ection port The RF output power is automatically reduced to 0 20 dBm...

Page 283: ...has been activated To reset the analyzer s power and regain control of the power level do the following 1 Remove any devices under test which may have contributed excess power to the analyzer s transmission port 2 Connect a cable from the re ection port to the transmission port 3 Press 4MENU5 NNNNNNNNNNNNNNNNN POWER 405 4215 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SOURCE POWER ON to turn t...

Page 284: ...E REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE b Check the atness of the R trace by comparing it with the trace in Figure 8 1 Figure 8 1 Sample R Input Trace 2 Check the A trace a Connect a short to the re ection test port of the analyzer b Press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN INPUT PORTS NNNNN A 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE c Check the atness of the inpu...

Page 285: ...test port to the transmission test port of the analyzer b Press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN INPUT PORTS NNNNN B 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE c Check the atness of the input B trace by comparing it with the trace in Figure 8 3 Receiver Troubleshooting 8 5 ...

Page 286: ...input traces resemble the corresponding sample trace continue with Troubleshooting When All Inp uts Look Bad If at least one input trace resembles its corresponding sample trace continue with Troubleshooting When One or More Inputs Look Good 8 6 Receiver Troubleshooting ...

Page 287: ...U NNNNNNNNNNNNNNNNN TESTS 4185 4215 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST to run the ADC o set 2 Then when the analyzer nishes test 18 press 4175 4215 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN EXECUTE TEST to run the ADC linearity test 3 If either of these tests FAIL continue with Check the 4 MHz REF Signal Receiver Troubleshooting 8 7 ...

Page 288: ...eck A10 by Substitution or Signal Examination If the 4 MHz REF signal is good at the A10 digital IF assembly check the A10 assembly by one of the following methods Substitute another A10 assembly and rerun internal tests 18 and 17 Check the signal control lines required for its operation The pins and signal sources of those lines are identi ed in Table 8 1 It is possible that the A9 assembly may n...

Page 289: ... Digital IF data 3 P2 58 A9P2 58 DIFD4 Digital IF data 4 P2 29 A9P2 29 DIFD5 Digital IF data 5 P2 59 A9P2 59 DIFD6 Digital IF data 6 P2 30 A9P2 30 DIFD7 Digital IF data 7 MSB P2 60 A9P2 60 L DIFEN0 Digital IF enable 0 P2 34 A9P2 34 L DIFEN1 Digital IF enable 1 P2 5 A9P2 5 L DIFEN2 Digital IF enable 2 P2 35 A9P2 35 DIFCC Digital IF conversion comp P2 33 A10P2 33 Figure 8 5 DIFCLK Digital IF serial ...

Page 290: ...Figure 8 5 Digital Data Lines Observed Using L INTCOP as Trigger Figure 8 6 Digital Control Lines Observed Using L INTCOP as Trigger 8 10 Receiver Troubleshooting ...

Page 291: ... of 5 dB DIV 2 Connect a thru between the re ection and transmission ports Press 4CH 25 The trace observed should be the same as the previous one If the traces are not as described perform the Frequency Response Correction adjustment in the Adjustments and Correction Constants chapter If the traces are still not as described after performing the adjustment replace the A10 assembly Check the 4 kHz ...

Page 292: ...LO Signal at Sampler Mixer If the 4 kHz signal is bad at the sampler mixer assembly check the 1st LO signal where it enters the sampler mixer assembly in question If the 1st LO is faulty check the 1st LO signal at its output connector on the A7 assembly to determine if the failure is in the cable or the assembly If the 1st LO is good continue with Check 2nd LO Signal at Sampler Mixer 8 12 Receiver...

Page 293: ...lers and the A12 assembly Table 8 3 2nd LO Locations Mnemonic Description Sampler Location Signal Source 2nd LO 1 2nd LO 0 degrees A4 5 6 P1 11 A12P1 2 32 2nd LO 2 2nd LO 090 degrees A4 5 6 P1 4 A12P1 4 34 If the 2nd LO is bad troubleshoot the A12 reference assembly and signal path If the 2nd LO is good and the B sampler is suspected faulty replace the A6 B sampler mixer If the 2nd LO is good but ...

Page 294: ...ably caused by the coupler If the level average value of the trace is wrong but the trace is otherwise correct the problem is most likely in the coupler or the A10 assembly Either measure the output of the coupler with a power meter or swap the A10 assembly with another known working A10 assembly Check directivity source match and crosstalk by performing the system veri cation procedure described ...

Page 295: ...the analyzer but render incorrect measurement data Failures which impede the normal functioning of the analyzer or prohibit the use of a feature This chapter addresses the rst category of failures which are usually caused by the following operator errors faulty calibration devices or connectors bad cables or adapters improper calibration techniques These failures are checked using the following pr...

Page 296: ... es the faulty assembly 2 Order a replacement assembly Refer to the Replaceable Parts chapter 3 Replace the faulty assembly and determine what adjustments are necessary Refer to the Assembly Replacement and Post Repair Procedures chapter 4 Perform the necessary adjustments Refer to the Adjustments and Correction Constants chapter 5 Perform the necessary performance tests Refer to the System Veri c...

Page 297: ...d inspecting the device connectors If any calibration device is obviously damaged or out of mechanical tolerance replace the device Inspect the Error Terms Error terms are a measure of a system a network analyzer calibration kit and any cables used As required refer to Chapter 11 Error Terms for the following The speci c measurement calibration procedure used to generate the error terms The routin...

Page 298: ...k the cable by examining the load match and transmission tracking terms If those terms are incorrect go to Cable Test 2 Verify the calibration kit devices Loads If the directivity error term looks good the load and the port are good If directivity looks bad check directivity again with a known good load If the problem is still present replace the dual directional coupler assembly Shorts and opens ...

Page 299: ...le Note that the important characteristic of a cable trace is its level the good cable trace is much lower not its regularity Refer to the cable manual for return loss speci cations Another way to verify the operation of the cable is to run the Cable Con dence Test test number 22 Press 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNN TESTS 4225 4x15 NNNNNNNNNNNNNNNNNN...

Page 300: ... Press 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ELECTRICAL DELAY Turn the front panel knob to enter enough electrical delay so that the trace appears as a dot at the left side of the smith chart see Figure 9 2a Replace the good short with the questionable short at the re ection port The trace of the questionable short should appear very similar to the known good short 3 Conne...

Page 301: ...Figure 9 2 Typical Smith Chart Traces of Good Short a and Open b Accessories Troubleshooting 9 7 ...

Page 302: ......

Page 303: ...two groups Internal Diagnostics Service Features When applicable the HP IB mnemonic is written in parentheses following the key See HP IB Service Mnemonic De nitions at the end of this section Error Messages The displayed messages that pertain to service functions are also listed in this chapter to help you Understand the message Solve the problem Service Key Menus and Error Messages 10 1 ...

Page 304: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TEST OPTIONS NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SELF DIAGNOSE Figure 10 1 Internal Diagnostics Menus Note Throughout this service guide these conventions are observed 4HARDKEYS5 are labeled front panel keys NNNNNNNNNNNNNNNNNNNNNNNNNN SOFTKEYS are display de ned keys in the menus HP IB COMMANDS when applicable follow the keystrokes in parentheses 10 2 Service K...

Page 305: ...eading Test Descriptions in the following pages The tests are divided by function into the following categories Internal Tests 0 20 External Tests 21 26 System Veri cation Tests 27 43 Adjustment Tests 44 58 Display Tests 59 65 Test Patterns 66 80 To access the rst test in each category press the category softkey To access the other tests use the numeric keypad step keys or front panel knob The tes...

Page 306: ...se softkeys NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE TESR1 continues the selected test NNNNNNNNNNN YES TESR2 alters correction constants during adjustment tests NNNNNNNNNNNNNN NEXT TESR4 displays the next choice NNNNNNNNNNNNNNNNNNNN SELECT TESR6 chooses the option indicated NNNNNNNNNNNNNNNNN ABORT TESR8 terminates the test and returns to the tests menu NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN INTER...

Page 307: ...NNNNNNNNNNNNNNNNNN CONTINUE TEST TESR1 resumes the test from where it was stopped NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN REPEAT on OFF TO2 toggles the repeat function on and o When the function is ON the selected test will run 10 000 times unless you press any key to stop it The analyzer shows the current number of passes and fails NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN RECORD on OFF TO1 tog...

Page 308: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN TEST OPTIONS NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN LOSS SENSR LISTS and then press one of the following NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN CAL FACTOR SENSOR A or NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN CAL FACTOR SENSOR B or NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN POWER LOSS NNNNNNNNNNNNNNNNNNNNNNN SEGMENT se...

Page 309: ...sts of internal tests 3 11 13 16 and 20 Use the front panel knob to scroll through the tests and see which failed If all pass the test displays a PASS status Each test in the subset retains its own test status 1 PRESET Runs the following subset of internal tests rst the ROM RAM tests 2 3 and 4 then tests 5 through 11 14 15 and 16 If any of these tests fail this test returns a FAIL status Use the f...

Page 310: ...osition No Result ALTER 1 With the jumper in this right position correction constants can be altered updated during adjustment procedures The altered correction constants are stored in EEPROM replacing previously stored correction constants CMOS 2 This destructive version of the CMOS RAM test internal test 3 continuously writes over information stored there DRAM 3 This destructive version of the m...

Page 311: ...SP and that most of the main RAM access circuits operate correctly 6 DSP RAM Veri es the A9 CPU RAM associated with the digital signal processor by using a write read pattern 7 DSP ALU Veri es the A9 CPU high speed math processing portions of the digital signal processor 8 DSP Intrpt Tests the ability of the A9 CPU digital signal processor to respond to interrupts from the A10 digital IF ADC 9 DIF...

Page 312: ...oding It does not test the HP IB interface for that see the HP 8752C Network Analyzer Programmer s Guide This runs only when selected or with ALL INTERNAL internal test 10 14 Post Reg Polls the status register of the A8 post regulator and ags these conditions heat sink too hot inadequate air ow or post regulated supply shutdown 15 Frac N Cont Tests the ability of the A9 CPU main processor to write...

Page 313: ...ts analog bus accuracy by measuring several analog bus reference voltages all nodes from the A10 digital IF This runs only when selected 20 FN Count Uses the internal counter to count the A14 fractional N VCO frequency 120 to 240 MHz and the divided fractional N frequency 100 kHz It requires the 100 kHz signal from A12 and the counter gate signal from A10 to pass Service Key Menus and Error Messag...

Page 314: ...2 Port 2 Op Chk Same as 21 but tests PORT 2 23 Fr Pan Seq Tests the front panel knob entry and all A1 front panel keys as well as the front panel microprocessor on the A2 assembly It prompts the user to rotate the front panel knob then press each key in an ordered sequence It continues to the next prompt only if the current prompt is correctly satis ed 24 Fr Pan Diag Similar to 23 above but the us...

Page 315: ...r for details 27 Sys Ver Init Runs a series of measurements on devices contained in the HP 85032B 50 Type N Calibration Kit for the HP 8752C or the HP 85036B 75 Type N Calibration Kit for the HP 8752C Option 075 28 31 Not used 32 34 Cal Coef 1 12 Copies error term data from a measurement calibration array to display memory A measurement calibration must be complete and active The de nition of cali...

Page 316: ...n tests 44 45 and 46 rst 49 Intensity Cor Stores the current values of the intensity adjustments under 4DISPLAY5 for recall of display intensity values at power on 50 Disp 2 Ex Not used in Adjustments Writes the secondary test pattern to the display for adjustments Press 4PRESET5 to exit this routine 51 IF Step Cor Measures the gain of the IF ampli ers A and B only located on the A10 digital IF to...

Page 317: ... overwrite an existing serial number 56 Option Cor Stores the option keyword required for Option 002 006 010 or any combination 57 Cal Kit Def Not used 58 Init EEPROM This test initializes certain EEPROM addresses to zeros and resets the display intensity correction constants to the default values Also the test will not alter the serial number and correction constants for Option 002 006 and 010 Se...

Page 318: ...ttern to the DRAM and then verifying that it can be read back 61 Main VRAM Tests the VRAM by writing all zeros to one location in each bank and then writing all ones to one location in each bank Finally a walking one pattern is written to one location in each bank 62 VRAM bank Tests all the cells in each of the 4 VRAM banks 63 VRAM video Veri es that the GSP is able to successfully perform both wr...

Page 319: ...est pattern is a problem it usually indicates that the face of the display needs to be de gaussed de magnetized If the purity is bad cycling the power a few times may cure the problem If this does not work a commercially available de magnetizer must be used 70 Test Pat 5 Displays a 16 step gray scale for verifying that the palette chip on the A19 GSP board can produce 16 di erent amplitudes of col...

Page 320: ...se between each horizontal sync pulse This pattern is used to troubleshoot the pixel processing circuit of the A19 GSP board 78 Test Pat 13 Displays a color rainbow pattern for showing the ability of the A19 GSP board to display 15 colors plus white The numbers written below each bar indicate the tint number used to produce that bar 0 100 pure red 33 pure green 67 pure blue 79 Test Pat 14 Displays...

Page 321: ...access the service feature menus NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MODES NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG BUS on OFF NNNNNNNNNNNNNNNNNNNNNNNNNNNNN PEEK POKE NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN FIRMWARE REVISION Figure 10 3 Service Feature Menus Service Key Menus and Error Messages 10 19 ...

Page 322: ...m analyzer Signal jumps and changes in shape at 20 MHz and 30 MHz when tuning up in frequency and at 29 2 MHz and 15 MHz when tuning down are due to switching of the digital divider This mode can be used with the SRC TUNE mode as described in Source Troubleshooting chapter NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SRC ADJUST MENU accesses the functions that allow you to adjust the source NNN...

Page 323: ...empt to complete the phase lock sequence Also all phase lock error messages are disabled The fractional N circuits and the receiver operate normally Therefore the instrument sweeps but the source is being driven by the pretune DAC in a stair stepped fashion NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PLL AUTO ON off SM4 Automatically attempts to determine new pretune values when the instrument...

Page 324: ... on the display along with the channel C1 or C2 and band number B1 through B13 This mode can be used with PLL PAUSE to halt the process at any step It can also be used with the analog bus counter NNNNNNNNNNNNNNNNNNNNNNNNNNNNN PLL PAUSE used only with PLL DIAG mode NNNNNNNNNNNNNN CONT indicates that it will continuously cycle through all steps of the phase lock sequence NNNNNNNNNNNNNNNNN PAUSE hold...

Page 325: ...cally determine if the attenuator should be switched in or out The switch occurs when the A or B input signal is approximately 030 dBm NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN IF GAIN ON Locks out the A10 IF attenuator sections for checking the A10 IF gain ampli er circuits regardless of the amplitude of the A or B IF signal Switches out both the A and B attenuation circuits they cannot be switched indepe...

Page 326: ... backup the correction constants can be regenerated manually although the procedures are more time consuming NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SPUR AVOID ON off SM8 O sets the frequency of both the A3 YIG oscillator and the A3 cavity oscillator to avoid spurs which cannot otherwise be ltered out NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SPUR AVOID OFF allows examination of t...

Page 327: ...trument The analog bus consists of a source section and a receiver section The source can be the following any one of the 31 nodes described in Analog Bus Nodes the A14 fractional N VCO the A14 fractional N VCO divided down to 100 kHz The receiver portion can be the following the main ADC the frequency counter When analog bus traces are displayed frequency is the x axis For a linear x axis in time...

Page 328: ...roubleshooting phase lock and source problems To read the counter over HP IB use the command OUTPCNTR Notes The display and marker units U correspond to volts Nodes 17 1st IF and 24 2nd LO are unreliable above 1 MHz About 0 750 MHz is a typical counter reading with no AC signal present Anything occurring during bandswitches is not visible Fast moving waveforms may be sensitive to sweep time The an...

Page 329: ... to monitor the analog bus nodes except nodes 1 2 3 4 9 10 12 with external equipment oscilloscope voltmeter etc To do this connect the equipment to the AUX INPUT BNC connector on the rear panel and press NNNNNNNNNNNNNNNNNNNNNNN AUX OUT until NNNNNNNN ON is highlighted Caution To prevent damage to the analyzer rst connect the signal to the rear panel AUX INPUT and then switch the function ON NNNNN...

Page 330: ...nitor the A14 fractional N VCO frequency at the node shown on the Overall Block Diagram in the Start Troubleshooting chapter NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN DIV FRAC N switches the counter to monitor the A14 fractional N VCO frequency after it has been divided down to 100 kHz for phase locking the VCO 10 28 Service Key Menus and Error Messages ...

Page 331: ...A3 to set up a power sweep on the analog bus Then follow the node speci c instructions Step A3 Press 4PRESET5 4SYSTEM5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SERVICE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG BUS ON 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ 415 4 5 435 4G n5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SWEEP TYPE MENU NNNNN...

Page 332: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE 4MKR5 Node 1 is the output of the main power DAC It sets the reference voltage to the ALC loop At normal operation this node should read approximately 04 volts at 0 dBm with a slope of about 0150 mV dB This corresponds to approximately 4 volts from 015 to 10 dBm Figure 10 4 Analog Bus Node 1 10 30 Service Key Menus and Error Messages ...

Page 333: ...NNNNNNNNNNNNN ANALOG BUS ON 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 425 4x15 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE 4MKR5 NNNNNNNNNNNNNNNNNNNNNNNNNN MARKER 2 425 4G n5 Node 2 measures the voltage on the internal voltage controlled oscillator During normal operation it should read 01V GHz Figure 10 5 Analog Bus Node 2 Service Key Menus and Error Messages 10 31 ...

Page 334: ...N 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 435 4x15 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE 4MKR5 NNNNNNNNNNNNNNNNNNNNNNNNNN MARKER 2 455 4G n5 Node 3 measures the current that goes to the main IF ampli er At normal operation this node should read about 430 mA from 300 kHz to 3 GHz 500 mA from 3 GHz to 6 GHz Figure 10 6 Analog Bus Node 3 10 32 Service Key Menus and Error Mess...

Page 335: ...45 4x15 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE Node 4 detects power that is coupled and detected from the RF OUT arm to the ALC loop Note that the voltage exponentially follows the power level inversely Flat segments indicate ALC saturation and should not occur between 085 dBm and 10 dBm Figure 10 7 Analog Bus Node 4 Service Key Menus and Error Messages 10 33 ...

Page 336: ...y can be predicted Node 6 Integ ALC leveling integrator output Perform step A3 above to set up a power sweep on the analog bus Then press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 465 4x15 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTO SCALE Node 6 displays the output of the summing circuit in the ALC loop Absolute voltage level variations are normal When node 6 goes above 0 volts the ALC ...

Page 337: ...2 405 4145 4x15 Node 7 displays the output of a logger circuit in the ALC loop The trace should be a linear ramp with a slope of 33 mv dB Absolute voltage level variations are normal Flat segments indicate ALC saturation and should not occur between 025 dBm and 0 dBm The proper waveform at node 7 indicates that the circuits in the A3 source ALC loop are normal and the source is leveled Figure 10 9...

Page 338: ...t line at approximately 0 37V This is used as the voltage reference in the Analog Bus Correction Constants adjustment procedure The voltage level should be the same in high and low resolution the absolute level is not critical Note The marker reading shows units of mV millivolts Node 10 2 50 V 2 50 V reference Perform step A10 above and then press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN NNN...

Page 339: ...f the test device on the other display channel With NNNNNNNNNNNNNNNNNNNNNNN AUX OUT switched ON you can examine the analyzer s analog bus nodes with external equipment see NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUX OUT on OFF under the Analog Bus Menu heading For HP IB considerations see HP IB Service Mnemonic De nitions located later in this chapter Node 12 A10 Gnd ground reference This nod...

Page 340: ...LE REF5 4 35 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN REFERENCE VALUE 401 295 4x15 The trace should be a at line across the entire operation frequency range within 0 3 V one division of the reference value Vbb Ref is used to compensate for ECL voltage drift Figure 10 10 Analog Bus Node 14 10 38 Service Key Menus and Error Messages ...

Page 341: ...NNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 4155 4x15 4SCALE REF5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN AUTOSCALE This node displays the source pretune signal and should look like a stair stepped ramp Each step corresponds to the start of a band Figure 10 11 Analog Bus Node 15 Service Key Menus and Error Messages 10 39 ...

Page 342: ...he source oscillator You should see a voltage ramp like the one shown in Figure 10 12 If this waveform is correct you can be con dent that the A11 phase lock assembly the A3 source assembly the A13 A14 fractional N assemblies and the A7 pulse generator are working correctly and the instrument is phase locked If you see anything else refer to the Source Troubleshooting chapter Figure 10 12 Analog B...

Page 343: ...NN CW FREQ Vary the frequency and compare the results to the table below Entered Frequency Counter Reading 0 2 to 15 999 MHz same as entered 16 MHz to 3 GHz 1 MHz This node displays the IF frequency see node17 as it enters the A11 phase lock assembly via the A4 R sampler assembly This signal comes from the R sampler output and is used to phase lock the source Figure 10 13 Counter Readout Location ...

Page 344: ...NNNNNNNNNNNNNN AUTOSCALE 4MRK5 4185 4M 5 This node detects the IF within the low pass lter limiter The lter is used during the track and sweep sequences but never in band 1 3 3 to 16 MHz The low level about 01 7V means IF is in the passband of the lter This node can be used with the FRAC N TUNE and SRC TUNE service modes Figure 10 14 Analog Bus Node 18 10 42 Service Key Menus and Error Messages ...

Page 345: ... not in band 1 Normal state is a at line at about 01 7 V Node 20 IF Det 1 IF after 30 MHz lter Perform step A11 above and then press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 4205 4x15 4SCALE REF5 40 35 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN REFERENCE VALUE 401 295 4x15 The trace should be a at line across the entire frequency band at least 0 5 V greater than Vbb node 14 The cor...

Page 346: ...NNNNNNNNNNNNNNNNNNNNNN ANALOG BUS ON Node 21 100 kHz 100 kHz reference frequency Perform step A12 above and then press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 4215 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN COUNTER ANALOG BUS This node counts the A12 100 kHz reference signal that is used on A13 the fractional N analog assembly as a reference frequency for the phase det...

Page 347: ...NNNNNN MARKER 2 4185 4M 5 The trace should show a voltage step as shown in Figure 10 16 At normal operation the left half trace should be 0 61000 mV and the right half trace should be 100 to 200 mV higher that is one to two divisions If the trace does not appear as shown in Figure 10 16 refer to the High Low Band Transition Adjustment in the Adjustments and Correction Constants chapter Figure 10 1...

Page 348: ... to 1 MHz frequency entered 4 kHz 1 to 16 MHz not accurate 16 MHz to 6 GHz 1 MHz Node 25 PL Ref phase lock reference Perform step A12 above and then press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 4255 4x15 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN COUNTER ANALOG BUS 4MENU5 NNNNNNNNNNNNNNNNNNNNNNN CW FREQ This node counts the reference signal used by the phase comparator cir...

Page 349: ...FERENCE This node displays the voltage used to ne tune the A12 reference VCXO to 40 MHz You should see a at line at some voltage level the actual voltage level varies from instrument to instrument Anything other than a at line indicates that the VCXO is tuning to di erent frequencies Refer to the Frequency Accuracy adjustment procedure Node 28 A12 Gnd 2 Ground reference A14 Fractional N Digital To...

Page 350: ...VCO tuning voltage If the A13 and A14 assemblies are functioning correctly and the VCO is phase locked the trace should look like Figure 10 17 Any other waveform indicates that the FN VCO is not phase locked The vertical lines in the trace indicate the band crossings The counter can also be enabled to count the VCO frequency in CW mode Figure 10 17 Analog Bus Node 29 10 48 Service Key Menus and Er...

Page 351: ...unter gate Perform step A14 above and then press 4MEAS5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNN ANALOG IN 4315 4x15 4SCALE REF5 425 4x15 4MKR5 You should see a at line at 5 V across the operating frequency range The counter gate activity occurs during bandswitches and therefore is not visible on the analog bus To view the bandswitch activity look at this node on an oscilloscope using NNNNNNNNNNNNNNNNNNNNNNN...

Page 352: ...se the front panel knob entry keys or step keys to enter the memory address of interest NNNNNNNNNNNNNN PEEK PEEK Displays the data at the accessed memory address NNNNNNNNNNNNNN POKE POKE D allows you to change the data at the memory address accessed by the NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PEEK POKE ADDRESS softkey Use the front panel knob entry keys or step keys to change the ...

Page 353: ... revision information The number and implementation date appear in the active entry area of the display as shown in Figure 10 19 below The analyzer s serial number and installed options are also displayed Another way to display the rmware revision information is to cycle the line power Figure 10 19 Location of Firmware Revision Information on Display Service Key Menus and Error Messages 10 51 ...

Page 354: ...s also provided in the Programming Guide Invoking Tests Remotely Many tests require a response to the displayed prompts Since bit 1 of the Event Status Register B is set bit 1 service routine waiting any time a service routine prompts the user for an expected response you can send an appropriate response using one of the following techniques Read event status register B to reset the bit Enable bit...

Page 355: ...counter s frequency data OUTPERRO Reads any prompt message sent to the error queue by a service routine OUTPTESS Outputs the integer status of the test most recently executed Status codes are those listed under TST TST Executes the power on self test internal test 1 and outputs an integer test status Status codes are as follows 0 pass 1 fail 2 in progress 3 not available 4 not done 5 done Service ...

Page 356: ...k Analyzer User s Guide for more information about the CMOS memory BATTERY LOW STORE SAVE REGS TO DISK Error Number 184 The battery protection of the non volatile CMOS memory is in danger of failing If this occurs all of the instrument state registers stored in CMOS memory will be lost Save these states to a disk and refer to the Assembly Replacement and Post Repair Procedures chapter for battery ...

Page 357: ... Constants chapter CORRECTION TURNED OFF Error Number 66 Critical parameters in your current instrument state do not match the parameters for the calibration set therefore correction has been turned o The critical instrument state parameters are sweep type start frequency frequency span and number of points CURRENT PARAMETER NOT IN CAL SET Error Number 64 Correction is not valid for your selected ...

Page 358: ... Refer to the disk drive operating manual DISK MESSAGE LENGTH ERROR Error Number 190 The analyzer and the external disk drive aren t communicating properly Check the HP IB connection and then try substituting another disk drive to isolate the problem instrument DISK not on not connected wrong addrs Error Number 38 The disk cannot be accessed by the analyzer Verify power to the disk drive and check...

Page 359: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN RESUME CAL SEQUENCE softkey is not valid unless a calibration is already in progress Start a new calibration NOT ENOUGH SPACE ON DISK FOR STORE Error Number 44 The store operation will over ow the available disk space Insert a new disk or purge les to create free disk space NO FILE S FOUND ON DISK Error Number 45 No les of the type created by an analyzer...

Page 360: ...r which may also delete an associated calibration set if all the instrument states using the calibration kit have been deleted You can store the saved instrument state and calibration set to a disk before clearing them After deleting the instrument states press 4PRESET5 to run the memory packer OVERLOAD ON REFL PORT POWER REDUCED Error Number 58 You have exceeded approximately 20 dBm at the re ect...

Page 361: ...is automatically reduced to 020 dBm The annotation P appears in the left margin of the display to indicate that the power trip function has been activated When this occurs reset the power to a lower level then toggle the NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SOURCE PWR on OFF softkey to switch the power back on PHASE LOCK CAL FAILED Error Number 4 An internal phase lock calibration...

Page 362: ...rdware failure in the source or you have attempted to set the power level too high Check to see if the power level you set is within speci cations If it is refer to the Source Troubleshooting chapter You will only receive this message over the HP IB On the analyzer P is displayed POW MET INVALID Error Number 116 The power meter indicates an out of range condition Check the test setup POW MET NOT S...

Page 363: ...een shut down Refer to the Power Supply Troubleshooting chapter POWER SUPPLY SHUT DOWN Error Number 22 One or more supplies on the A8 post regulator assembly have been shut down due to an over current over voltage or under voltage condition Refer to the Power Supply Troubleshooting chapter PRINTER not on not connected wrong addrs Error Number 24 The printer does not respond to control Verify power...

Page 364: ...ternal test n has failed Several internal test routines are executed at instrument preset The analyzer reports the rst failure detected Refer to the internal tests and the self diagnose feature descriptions earlier in this chapter SOURCE POWER TRIPPED RESET UNDER POWER MENU Information Message You have exceeded the maximum power level at one of the inputs and power has been automatically reduced T...

Page 365: ...ally switched to CW TEST ABORTED Error Number 113 You have prematurely stopped a service test TROUBLE CHECK SETUP AND START OVER Service Error Number 115 Your equipment setup for the adjustment procedure in progress is not correct Check the setup diagram and instructions in the Adjustments and Correction Constants chapter Start the procedure again WRONG DISK FORMAT INITIALIZE DISK Error Number 77 ...

Page 366: ......

Page 367: ...erest and comparing the measured data with the ideal model for the devices The di erences represent systematic repeatable errors of the analyzer system The resulting calibration coe cients are good representations of the systematic error sources For details on the various levels of error correction refer to the Optimizing Measurement Results chapter of the HP 8752C Network Analyzer User s Guide Fo...

Page 368: ...bles Troubleshooting If a subtle failure or mild performance problem is suspected the magnitude of the error terms should be compared against values generated previously with the same instrument and calibration kit This comparison will produce the most precise view of the problem However if previously generated values are not available compare the current values to the typical values listed in Tab...

Page 369: ...ooting Here chapter if a blatant failure or gross measurement error is evident It is often worthwhile to perform the procedure twice using two distinct measurement calibrations to establish the degree of repeatability If the results do not seem repeatable check all connectors and cables Error Terms 11 3 ...

Page 370: ...ibration kit is the N 50 default press NNNNNNNNNNNNNNNNNNNNNNN CAL KIT NNNNNNNNNNNNNNNNN N 50 NNNNNNNNNNNNNNNNNNNN RETURN 4 To select the correction type press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN CALIBRATE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN REFLECTION 1 PORT 5 Connect a shielded open circuit to the REFLECTION port See Figure 11 1 Figure 11 1 Standard Connections fo...

Page 371: ...NNNNNNNNNNNNNNNNNNNNNNNNNNN FORWARD SHORTS NNNNNNNNNNNNNNNNNNNNNNNNNNNNN SHORT f After the beep press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN DONE SHORTS 9 Disconnect the short and connect an impedance matched load to the REFLECTION port 10 To measure the standard press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN FORWARD LOAD The analyzer underlines the NNNNNNNNNNNNNN LOAD softkey after it measures t...

Page 372: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNN CALIBRATE MENU NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN RESPONSE ISOL N 4 Press NNNNNNNNNNNNNNNNNNNNNNNNNN RESPONSE 5 Connect equipment as shown in Figure 11 2 Figure 11 2 Standard Connections for Response Calibration 6 Press NNNNNNNNNNNNNN THRU 7 After the beep press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN DONE RESPONSE 8 Connect the equipment as s...

Page 373: ...connect and measure your device under test Table 11 1 Calibration Coe cient Terms and Tests Calibration Coe cient Calibration Type Test Number Response Response and Isolation1 1 port 1 ER or ET EX ED ED 32 2 ET ER ES 33 3 ER 34 NOTES Meaning of rst subscript D directivity S source match R re ection tracking X crosstalk L load match T transmission tracking 1 Response and Isolation cal yields EX or ...

Page 374: ... section and to previously measured data If data is not available from previous measurements refer to the typical uncorrected performance speci cations listed in Table 11 2 5 Make a hardcopy of the measurement results a Connect a printing or plotting peripheral to the analyzer b Press 4LOCAL5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SYSTEM CONTROLLER NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN...

Page 375: ...ypical performance without error correction RF cables are not used except as noted Related error terms should be within these values Table 11 2 Uncorrected System Performance Frequency Range GHz 0 0003 to 1 3 1 3 to 3 0 3 0 to 6 0 Directivity 40 dB1 35 dB 32 dB Source Match 30 dB 25 dB 20 dB Re ection Tracking 60 2 dB 60 3 dB 60 4 dB Transmission Tracking 60 2 dB 60 3 dB 60 4 dB Crosstalk 100 dB 1...

Page 376: ...escriptions in this section include the following information signi cance of each error term typical results following either a re ection 1 port or a response and isolation calibration guidelines to interpret each error term 11 10 Error Terms ...

Page 377: ... procedure Signi cant System Components load used in the error correction calibration test port connectors analyzer s directional coupler A ected Measurements Low re ection device measurements are most a ected by directivity errors Highly re ective device measurements will look normal Procedure To view the analyzer s directivity parameters perform a 1 port calibration then press 4SYSTEM5 NNNNNNNNN...

Page 378: ...Figure 11 4 Typical ED Re ection Test Port 11 12 Error Terms ...

Page 379: ...the test port Signi cant System Components open calibration kit device short calibration kit device analyzer s directional coupler test port connectors A ected Measurements Re ection and transmission measurements of highly re ective devices are most a ected by source match errors Procedure To view the analyzer s source match parameters perform a 1 port calibration then press 4SYSTEM5 NNNNNNNNNNNNN...

Page 380: ...Figure 11 5 Typical ES Re ection Test Port 11 14 Error Terms ...

Page 381: ... open and a short during calibration Signi cant System Components open calibration kit device short calibration kit device R or A signal path for large variation in ER A ected Measurements All re ection measurements high or low return loss are a ected by the re ection tracking errors Procedure To view the analyzer s re ection tracking parameters perform a 1 port calibration then press 4SYSTEM5 NNN...

Page 382: ...Figure 11 6 Typical ER Re ection Test Port 11 16 Error Terms ...

Page 383: ... Hz IF bandwidth must be used in order to lower the noise oor beyond the crosstalk speci cation Using averaging will also reduce the peak to peak noise in this error term Signi cant System Components sampler crosstalks A ected Measurements Transmission measurements primarily where the measured signal level is very low are a ected by isolation errors For example transmission measurements where the ...

Page 384: ...Figure 11 7 Typical EX with 10 Hz Bandwidth Figure 11 8 Typical EX with 3 kHz Bandwidth 11 18 Error Terms ...

Page 385: ...are characterized by measuring the transmission of the thru con guration during the error correction procedure Signi cant System Components R signal path A input paths thru cable A ected Measurements All transmission measurements are a ected by transmission tracking errors Procedure To view the analyzer s transmission tracking parameters perform a 1 port calibration then press 4SYSTEM5 NNNNNNNNNNN...

Page 386: ...Figure 11 9 Typical ET 11 20 Error Terms ...

Page 387: ...sections How the HP 8752C Works gives a general description of the HP 8752C network analyzer s operation A Close Look at the Analyzer s Functional Groups provides more detailed operating theory for each of the analyzer s functional groups Theory of Operation 12 1 ...

Page 388: ...rement signal processing and display The HP 8752C vector network analyzer integrates a high resolution synthesized RF source transmission re ection test set and a dual channel three input receiver to measure and display magnitude phase and group delay of transmitted and re ected power The HP 8752C Option 010 has the additional capability of transforming measured data from frequency domain to time ...

Page 389: ...ocked to a highly stable crystal oscillator For this purpose a portion of the transmitted signal is routed to the R sampler mixer of the receiver where it is sampled by the phase detection loop and fed back to the source The Source Step Attenuator Option 004 The HP 8752C Option 004 includes a 70 dB electro mechanical step attenuator This very low loss attenuator is contained in the source assembly...

Page 390: ...n 006 have an 8 dB pad between the transmission test port and the B sampler mixer The Receiver Block The receiver block contains three sampler mixers for the R A and B inputs The signals are sampled and down converted to produce a 4 kHz IF intermediate frequency A multiplexer sequentially directs each of the three IF signals to the ADC analog to digital converter where it is converted from an anal...

Page 391: ...s combine to provide digital control for the analyzer Source The source group consists of the A3 source A7 pulse generator A11 phase lock A12 reference A13 fractional N analog and A14 fractional N digital assemblies The A4 R sampler is also related since it is part of the source phase lock loop The source supplies a phase locked RF signal to the device under test Signal Separation The signal separ...

Page 392: ...li ed block diagram of the power supply group Figure 12 2 Power Supply Functional Group Simpli ed Block Diagram A15 Preregulator The A15 preregulator steps down and recti es the line voltage It provides a fully regulated 5V digital supply and several preregulated voltages that go to the A8 post regulator assembly for additional regulation The A15 preregulator assembly includes the line power modul...

Page 393: ...regulation 70V 25V 18V 018V 8V 08V Regulated 5V Digital Supply The 5VD supply is regulated by the control circuitry in the A15 preregulator It is routed directly to the motherboard and from there to all assemblies requiring a low noise digital supply A 5V sense line returns from the motherboard to the A15 preregulator The 5V CPU is derived from the 5 VD in the A8 post regulator and goes directly t...

Page 394: ...hutdown circuit is triggered by overcurrent overvoltage undervoltage or overtemperature It protects the instrument by causing the regulated voltage supplies to be shut down It also sends status messages to the A9 CPU to trigger warning messages on the analyzer s display The voltages that are not shut down are the 5VD and 5VCPU digital supplies from the preregulator the fan supplies the probe power...

Page 395: ... 012 6V to provide a power source at the front panel for an external RF probe or milli meter modules Digital Control Theory The digital control functional group consists of the following assemblies A1 front panel A2 front panel processor A9 CPU A10 digital IF A16 rear panel A18 display A19 GSP These assemblies combine to provide digital control for the entire analyzer They provide math processing ...

Page 396: ... user interface with the analyzer It includes the keyboard for local user inputs and the front panel LEDs that indicate instrument status The RPG rotary pulse generator is not electrically connected to the A1 front panel keyboard but provides user inputs directly to the front panel processor 12 10 Theory of Operation ...

Page 397: ...nstrument through the instrument bus The main CPU receives external control information from the front panel or HP IB and performs processing and formatting operations on the raw data in the main RAM It controls the digital signal processor the front panel processor the display processor and the interconnect port interfaces In addition when the analyzer is in the system controller mode the main CP...

Page 398: ...he main RAM A18 Display The A18 display is a 7 5 inch raster scan CRT with associated drive circuitry It receives a 65V power supply from the A19 GSP along with digital TTL horizontal and vertical sync signals as well as red green and blue RGB video signals Automatic degaussing is performed whenever the instrument is switched on to minimize the magnetization of the display A19 GSP The A19 graphics...

Page 399: ...nput from an external signal source such as a detector or function generator which you can then measure You can also use this connector as an analog output in service routines EXT AM This allows an external analog signal input to be applied to the ALC circuitry of the analyzer s source This input analog signal amplitude modulates the RF output signal EXT TRIGGER This allows connection of an extern...

Page 400: ...i erent harmonic number for each subsweep The low band frequencies 300 kHz to 16 MHz are down converted by fundamental mixing The source functional group consists of the individual assemblies described below A14 A13 Fractional N These two assemblies comprise the synthesizer The 30 to 60 MHz VCO in the A14 assembly generates the stable LO frequencies for fundamental and harmonic mixing A12 Referenc...

Page 401: ...includes a 3 0 to 6 8 GHz YIG oscillator and a 3 8 GHz cavity oscillator The outputs of these oscillators are mixed to produce the RF output signal In Option 006 300 kHz to 6 GHz the frequencies 3 0 to 6 0 GHz are no longer a mixed product but are the direct output of the YIG oscillator The signal tracks the stable output of the synthesizer The ALC automatic leveling control circuitry is also in t...

Page 402: ... fractional N VCO goes to the A12 reference assembly where it is mixed with the 4O MHz VCXO voltage controlled crystal oscillator The resulting signal is the reference to the phase comparator in the A11 assembly 3 The A3 source is pretuned The source output is fed to the A4 R sampler mixer The pretuned DAC in the A11 phase lock assembly sets the A3 source to a frequency 1 to 6 MHz above the start ...

Page 403: ...hase lock is achieved at the start frequency the synthesizer starts to sweep This changes the phase lock reference frequency and causes the source to track at a di erence frequency 40 MHz below the synthesizer Figure 12 4 Low Band Operation of the Source Theory of Operation 12 17 ...

Page 404: ...s the source is pretuned and then relocks Table 12 1 lists the low band subsweep frequencies at the fractional N VCO and the source output Table 12 1 Low Band Subsweep Frequencies Fractional N MHz 1st IF MHz Source Output MHz 40 3 to 43 3 0 3 to 3 3 0 3 to 3 3 43 3 to 56 0 3 3 to 16 0 3 3 to 16 0 12 18 Theory of Operation ...

Page 405: ...scillator signal to the samplers One of the harmonic signals is 1 MHz below the start signal set from the front panel 3 The A3 source is pretuned The source output is fed to the A4 R sample mixer The pretune DAC in the A11 phase lock assembly sets the A3 source to a rst approximation frequency 1 to 6 MHz higher than the start frequency This signal RF OUT goes to the A4 R sampler mixer assembly via...

Page 406: ... locked to the synthesizer at the start frequency the synthesizer starts to sweep The phase locked loop forces the source to track the synthesizer maintaining a constant 1 MHz 1st IF signal The full high band sweep is generated in a series of subsweeps by phase locking the A3 source signal to harmonic multiples of the fractional N VCO The 16 to 31 MHz subsweep is produced by a one half harmonic us...

Page 407: ...Figure 12 5 High Band Operation of the Source Theory of Operation 12 21 ...

Page 408: ...1 2 16 to 31 30 to 60 1 31 to 61 30 to 60 2 61 to 121 40 to 59 3 121 to 178 35 4 to 59 2 5 178 to 296 32 8 to 59 4 9 296 to 536 35 7 to 59 5 15 536 to 893 33 0 to 59 5 27 893 to 1607 31 5 to 58 8 51 1607 to 3000 37 0 to 59 6 83 3000 to 4950 49 0 to 59 4 101 4950 to 6000 12 22 Theory of Operation ...

Page 409: ...er coupled arm of the dual directional coupler to the input of the A sampler mixer in the receiver The transmitted signal is fed directly from the transmission test port to the B sampler mixer Analyzers having Option 006 have an 8 dB pad between the transmission test port and the B sampler mixer Receiver Theory The receiver functional group consists of the following assemblies A4 R sampler mixer A...

Page 410: ...Figure 12 6 Receiver Functional Group standard and Option 003 12 24 Theory of Operation ...

Page 411: ...Figure 12 7 Receiver Functional Group Option 003 and 004 Theory of Operation 12 25 ...

Page 412: ...Figure 12 8 Receiver Functional Group Option 006 12 26 Theory of Operation ...

Page 413: ...Figure 12 9 Receiver Functional Group Option 004 and 006 Theory of Operation 12 27 ...

Page 414: ...en the source frequency and the harmonic 1 MHz below it This xed 1 MHz signal is the 1st IF Part of the 1st IF signal from the A4 R sampler is fed back to the A11 phase lock assembly The Sampler Circuit in Low Band In low band the sampler diodes are biased continuously on so that the RF input signal passes through them unchanged Thus the 1st IF is identical to the RF output signal from the source ...

Page 415: ...d IF signals from the sampler mixer assemblies are input to the A10 digital IF assembly These signals are sampled at a 16 kHz rate A fourth input is the analog bus which can monitor either an external input at the rear panel AUX IN connector or one of 31 internal nodes A multiplexer sequentially directs each of the signals to the ADC analog to digital converter Here they are converted to digital f...

Page 416: ......

Page 417: ... network analyzer Replaceable parts include the following major assemblies cables chassis hardware In general parts of major assemblies are not listed Refer to Abbreviations at the back of this chapter to help interpret part descriptions in the replaceable parts lists that follow Replaceable Parts 13 1 ...

Page 418: ...ts Refer to the Adjustments and Correction Constants chapter 5 Perform the necessary performance tests Refer to the System Veri cation and Performance Tests chapter Save Money with Rebuilt Exchange Assemblies Under the rebuilt exchange assembly program certain factory repaired and tested modules assemblies are available on a trade in basis These assemblies cost less than a new assembly and meet al...

Page 419: ...Figure 13 1 Module Exchange Procedure Replaceable Parts 13 3 ...

Page 420: ...s information to the nearest Hewlett Packard o ce or in the U S call the hotline number listed in the following section Call 800 227 8164 to Order Parts Fast U S only When you have gathered the information required to place an order contact Hewlett Packard s direct ordering team by calling the following toll free hotline number 800 227 8164 Monday through Friday 6 AM to 5 PM Paci c Standard Time T...

Page 421: ... View Front Panel Cables and Attaching Hardware Rear Panel Cables and Attaching Hardware Source and Sampler Parts Standard and Option 003 Source and Sampler Parts Option 004 006 Source and Sampler Parts Options 004 and 003 004 Source and Sampler Parts Option 006 Display Bezel Assembly Chassis Parts Top View of Attaching Hardware and Post Regulator Fuses Bottom View of Attaching Hardware Right View...

Page 422: ...Rebuilt Exchange A11 08753 60162 1 PHASE LOCK BD ASSY A12 08752 60023 1 REFERENCE BD ASSY A13 08753 60013 1 FRACTIONAL N ANALOG BD ASSY 08753 69013 FRACTIONAL N ANALOG BD ASSY Rebuilt Exchange A14 08753 60068 1 FRACTIONAL N DIGITAL BD ASSY A15 08753 60098 1 PREREGULATOR ASSY 08753 69098 PREREGULATOR ASSY Rebuilt Exchange A16 REAR PANEL BD ASSY see Rear Panel Assemblies A17 08753 60130 1 MOTHERBOAR...

Page 423: ...Major Assemblies Replaceable Parts 13 7 ...

Page 424: ... 6 SCREW MACHINE M3 0210 CW PN TX 6 08752 40003 1 KEYPAD RUBBER 7 0515 1410 2 SCREW MACHINE M3 0 2 20 CW PN TX 8 0515 0375 2 SCREW MACHINE M3 0 2 16 CW PN TX A1 08753 60140 1 FRONT PANEL KEYBOARD ASSY A1W1 RIBBON CA ASSY A1 to A2 p o A1 see Cables Top View A2 08753 60091 1 FRONT PANEL INTERFACE BD ASSY RPG1 08757 60053 1 ROTARY PULSE GENERATOR RPG W18 08711 60037 1 PROBE POWER CA ASSY A2 to FRONT ...

Page 425: ...Front Panel Assemblies Replaceable Parts 13 9 ...

Page 426: ...D 3 0515 0965 4 SCREW SOCKET HEAD CAP M3 2 0 5 14MM LONG 4 08753 20040 1 FAN GASKET 5 08753 00047 1 REAR PANEL A16 08752 60013 1 REAR PANEL BD ASSY includes A16W1 B1 08753 60047 1 FAN includes cable assembly W13 CA ASSY REAR PANEL to A12 see Cables Top View Metric hardware other thread types will damage threaded holes 13 10 Replaceable Parts ...

Page 427: ...Rear Panel Assemblies Replaceable Parts 13 11 ...

Page 428: ...Y RF IN to A6 W5 08753 60027 1 FLX RF CA ASSY A7 to A4 W6 08753 60027 1 FLX RF CA ASSY A7 to A5 W7 08753 60027 1 FLX RF CA ASSY A7 to A6 W8 08753 60061 1 FLX RF CA ASSY A4 to A11 W9 08753 60061 1 FLX RF CA ASSY A14 to A7 W10 08753 60029 1 FLX RF CA ASSY A14 to A12 W11 08753 60029 1 FLX RF CA ASSY A14 to A13 W12 08753 60029 1 FLX RF CA ASSY A12 to A13 W13 08753 60026 1 FLX RF CA ASSY A16 to A12 W14...

Page 429: ...Cables Top View Replaceable Parts 13 13 ...

Page 430: ...SY A30 to A5 W17 08753 60033 1 RIBBON CA ASSY A2 to A17 W50 1250 2189 1 CA ASSY A30 to REFLECTION PORT W75 075 1250 2311 1 CA ASSY A30 to REFLECTION PORT Metric hardware other thread types will damage threaded holes Note The cables described on this page are common to all instrument options For option speci c cables refer to the Source and Sampler Parts section for your option 13 14 Replaceable Pa...

Page 431: ...Front Panel Cables and Attaching Hardware Replaceable Parts 13 15 ...

Page 432: ... p o A15 1 CA ASSY A15 to A8 and A17 A16W1 08753 60033 1 RIBBON CA ASSY A16 to A17 p o A16 W13 08753 60026 1 FLX RF CA ASSY REAR PANEL to A12 W21 08753 60117 1 FLX RF CA ASSY RED p o A16 W22 08753 60118 1 FLX RF CA ASSY GREEN p o A16 W23 08753 60119 1 FLX RF CA ASSY BLUE p o A16 Metric hardware other thread types will damage threaded holes 13 16 Replaceable Parts ...

Page 433: ...Rear Panel Cables and Attaching Hardware Replaceable Parts 13 17 ...

Page 434: ...ID CAV OSC A3A4 to SOURCE A3 A3A2W1 08753 60034 1 RIBBON CA ASSY EYO A3A3 to ALC A3A2 A3W7 08752 20024 1 RF CA 4 dB ATTENUATOR A3AT1 to BULKHEAD A3 OUTPUT A4 08753 60004 1 R SAMPLER ASSY A5 08753 60004 1 A SAMPLER ASSY A6 08753 60004 1 B SAMPLER ASSY W1 08752 20021 1 RF CA SOURCE A3 to COUPLER A30 W2 5021 8770 1 RF CA COUPLER A30 to R SAMPLER A4 W3 5021 8771 1 RF CA COUPLER A30 to A SAMPLER A5 W4 ...

Page 435: ...Source and Sampler Parts Standard and Option 003 Replaceable Parts 13 19 ...

Page 436: ...EYO A3A3 to ALC A3A2 A3W3 08753 20106 1 RF CA SOURCE A3 to 70 dB STEP ATTENUATOR A3A5 A3W4 08753 20111 1 RF CA 70 dB STEP ATTENUATOR A3A5 to BULKHEAD A3 OUTPUT AT1 0955 0206 1 8 dB ATTENUATOR connects to B sampler A4 08753 60004 1 R SAMPLER ASSY A5 08753 60004 1 A SAMPLER ASSY A6 08753 60169 1 B SAMPLER ASSY W1 08752 20021 1 RF CA SOURCE A3 to COUPLER A30 W3 5021 8771 1 RF CA COUPLER A30 to A SAMP...

Page 437: ...Source and Sampler Parts Option 004 006 Replaceable Parts 13 21 ...

Page 438: ...8753 60034 1 RIBBON CA ASSY EYO A3A3 to ALC A3A2 A3W3 08753 20106 1 RF CA SOURCE A3 to 70 dB STEP ATTENUATOR A3A5 A3W4 08753 20111 1 RF CA 70 dB STEP ATTENUATOR A3A5 to BULKHEAD A3 OUTPUT A4 08753 60004 1 R SAMPLER ASSY A5 08753 60004 1 A SAMPLER ASSY A6 08753 60004 1 B SAMPLER ASSY W1 08752 20021 1 RF CA SOURCE A3 to COUPLER A30 W3 5021 8771 1 RF CA COUPLER A30 to A SAMPLER A5 W4 08753 20030 1 RF...

Page 439: ...Source and Sampler Parts Options 004 and 003 004 Replaceable Parts 13 23 ...

Page 440: ...A3A4 to SOURCE A3 A3A2W1 08753 60034 1 RIBBON CA ASSY EYO A3A3 to ALC A3A2 A3W7 08752 20024 1 RF CA 4 dB ATTENUATOR A3AT1 to BULKHEAD A3 OUTPUT A4 08753 60004 1 R SAMPLER ASSY A5 08753 60004 1 A SAMPLER ASSY A6 08753 60169 1 B SAMPLER ASSY W1 08752 20021 1 RF CA SOURCE A3 to COUPLER A30 W2 5021 8770 1 RF CA COUPLER A30 to R SAMPLER A4 W3 5021 8771 1 RF CA COUPLER A30 to A SAMPLER A5 W34 08752 2002...

Page 441: ...Source and Sampler Parts Option 006 Replaceable Parts 13 25 ...

Page 442: ...ameplate must be ordered separately 3 0515 2113 2 SCREW MACHINE M4 028 PC PN TX 4 08752 80032 1 NAMEPLATE 8752C 4 003 08752 80034 1 NAMEPLATE 8752C OPTION 003 4 006 08752 80035 1 NAMEPLATE 8752C OPTION 006 5 08757 40003 1 BEZEL SUPPORT Metric hardware other thread types will damage threaded holes 13 26 Replaceable Parts ...

Page 443: ...Display Bezel Assembly Replaceable Parts 13 27 ...

Page 444: ...STRAP HANDLE CAP FRONT 9 1460 1345 2 TILT STAND 10 5041 8801 4 FOOT STANDARD 11 5062 3747 1 COVER BOTTOM ASSY order item 11A also 11A 08753 20039 1 BOTTOM COVER MYLAR INSULATOR not shown 12 5062 3817 1 COVER SIDE PERF 13 5041 8802 1 TRIM TOP 14 5062 3990 1 FRONT HANDLE KIT for rack mount options 15 5041 8821 4 REAR STANDOFF 16 0515 1402 4 SCREW MACHINE M3 528 PC PN TX 17 5021 8405 1 FRONT FRAME Me...

Page 445: ...Chassis Parts Replaceable Parts 13 29 ...

Page 446: ... FUSE 2A 125V NTD 0 2520 27 A8F2 2110 0424 1 FUSE 0 75A 125V NTD 0 2520 27 A8F3 2110 0425 1 FUSE 2A 125V NTD 0 2520 27 A8F4 2110 0424 1 FUSE 0 75A 125V NTD 0 2520 27 A8F5 2110 0476 1 FUSE 4A 125V NTD 0 2520 27 A8F6 2110 0425 1 FUSE 2A 125V NTD 0 2520 27 A8F7 2110 0476 1 FUSE 4A 125V NTD 0 2520 27 A8F8 2110 0047 1 FUSE 1A 125V NTD 0 2520 27 A8F9 2110 0046 1 FUSE 0 5A 125V NTD 0 2520 27 MP1 08753 00...

Page 447: ...Top View of Attaching Hardware and Post Regulator Fuses Replaceable Parts 13 31 ...

Page 448: ... 1400 5 SCREW MACHINE M3 528 PC FL TX 2 5180 8500 1 INSULATOR 3 0515 0377 2 SCREW MACHINE M3 5210 CW PN TX 4 0515 0458 2 SCREW MACHINE M3 528 CW PN TX A17 MOTHERBOARD ASSY see Major Assemblies Metric hardware other thread types will damage threaded holes 13 32 Replaceable Parts ...

Page 449: ...Bottom View of Attaching Hardware Replaceable Parts 13 33 ...

Page 450: ...ing Hardware Item HP Part Number Qty Description 1 0515 2086 8 SCREW MACHINE M4 027 PC FL TX 2 0515 1400 1 SCREW MACHINE M3 528 PC FL TX Metric hardware other thread types will damage threaded holes 13 34 Replaceable Parts ...

Page 451: ...X 2 0515 2086 3 SCREW MACHINE M4 027 PC FL TX 3 1460 1573 1 SPRING EXTENSION 138 OD 4 0515 0430 1 SCREW MACHINE M3 026 CW PN TX 5 08753 00036 1 INSULATOR SWITCH 6 08753 00048 1 ACTUATOR LINE SWITCH 7 08757 40005 1 LINE BUTTON Metric hardware other thread types will damage threaded holes Replaceable Parts 13 35 ...

Page 452: ...BLE CHAMFER 15 32 32 THREAD 3 2190 0586 2 WASHER LOCK HELICAL 4 0 MM 4 1 MM ID 4 0380 0643 2 STANDOFF HEX 0 255 INCH LONG 6 32 THREAD 5 1251 2942 2 LOCK SUBMIN D CONN includes lockwashers 6 0515 0372 3 SCREW MACHINE M3 028 CW PN TX 7 2110 0780 1 FUSE 3A 250V NON TIME DELAY Metric hardware other thread types will damage threaded holes 13 36 Replaceable Parts ...

Page 453: ...03 1 LABEL LOCATION DIAGRAM 2 7120 4295 1 LABEL HAZARDOUS VOLTAGE WARNING 3 7120 6999 1 LABEL LINE VOLTAGE SELECTOR SWITCH 4 7121 2527 1 LABEL METRIC HARDWARE CAUTION 5 08753 80066 1 LABEL WARNING CAUTION 6 7121 5125 1 TAG WARNING ESD SENSITIVE Replaceable Parts 13 37 ...

Page 454: ...SS ATTENUATOR HP 11853A 50 TYPE N ADAPTER KIT HP 11878A 50 3 5 MM ADAPTER KIT HP 11854A 50 BNC ADAPTER KIT HP 11855A 75 TYPE N ADAPTER KIT HP 11856A 75 BNC ADAPTER KIT 8120 4781 50 TYPE N TEST PORT RETURN CA 8120 2408 75 TYPE N TEST PORT RETURN CA 9300 0969 ESD WRIST STRAP SMALL 9300 1117 ESD WRIST STRAP MEDIUM 9300 0970 ESD WRIST STRAP LARGE HP 92175T ESD TABLE MAT HP 10833A HP IB CA 1 M 3 3 FEET...

Page 455: ...S 08752 90136 HP 8752C SERVICE GUIDE this manual 08752 90158 HP 8752C COMPONENT LEVEL INFORMATION UPGRADE KITS HP 11884D 6 GHz UPGRADE KIT conversion to Opt 006 HP 11885A 3 GHz RECEIVER UPGRADE KIT conversion to Opt 003 HP 85019C TIME DOMAIN UPGRADE KIT conversion to Opt 010 08752 60019 ATTENUATOR UPGRADE KIT conversion to Opt 004 SERVICE NOTES 8753A 1 9 EEPROM BACKUP 8753A 5 IMPROVING RELIABILITY...

Page 456: ...rtz HEX hexagonal HP Hewlett Packard HP IB Hewlett Packard interface bus HX hex recess screws ID inside diameter IF intermediate frequency I O input output LED light emitting diode M meters M metric hardware MHz megahertz mm millimeters MNL manual MON monitor NOM nominal NTD non time delay NY nylon OD outside diameter Opt option OSC oscillator PC patch lock screws PC printed circuit PN panhead scr...

Page 457: ...this chapter consist of the following Cover Removal Initial Front Panel Procedure Initial Rear Panel Procedure A1 A2 keyboard front panel interface A3 source A15 A16 preregulator rear panel board A18 display A30 directional coupler B1 fan A9BT1 battery Caution Many of the assemblies in this instrument are very susceptible to damage from ESD electrostatic discharge Perform the following procedures ...

Page 458: ...lace the faulty assembly and determine what adjustments are necessary Refer to the Assembly Replacement and Post Repair Procedures chapter 4 Perform the necessary adjustments Refer to the Adjustments and Correction Constants chapter 5 Perform the necessary performance tests Refer to the System Veri cation and Performance Tests chapter Tools Required ESD wrist strap and grounding cord Small at edge...

Page 459: ...remove screw 9 lower stando 10 slide cover o loosen screw 11 slide cover back To remove left side cover To remove bottom cover remove top cover remove bottom feet 12 remove screw 4 lower stando 5 remove screws 4 9 lower stando s 5 10 remove screws 6 handle 7 loosen screw 13 loosen screw 8 slide cover o slide cover back Assembly Replacement and Post Repair Procedures 14 3 ...

Page 460: ...of the cover 2 Pry the cover away from the bezel Do not scratch the glass 3 Remove the two screws item 2 exposed by the previous step 4 Remove the bezel item 3 from the frame 5 Remove the trim strip from the top edge of the front frame by prying it with a at screwdriver 6 Remove the two right most screws from the top edge of the frame item 4 14 4 Assembly Replacement and Post Repair Procedures ...

Page 461: ... of Frame 7 Turn the instrument over and remove the right front foot 8 Remove the two screws from the bottom edge of the frame item 5 9 Continue with the procedure which referred you to this one Assembly Replacement and Post Repair Procedures 14 5 ...

Page 462: ...ure 1 Remove the top and bottom covers see Cover Removal Procedure 2 Remove the PC board stabilizer item 6 Figure 14 4 Figure 14 4 Location of EXT REF cable and GSP Assembly 14 6 Assembly Replacement and Post Repair Procedures ...

Page 463: ...on cable to access them Figure 14 5 Location of Rear Panel Fasteners 6 Remove seven screws from the rear panel assembly two from the top and bottom frames item 9 and three from the back item 10 Figure 14 5 7 Pull the rear panel away from the frame Disconnect the ribbon cable from its motherboard connector by pressing down and out on the connector locks 8 Continue with the procedure which referred ...

Page 464: ... to Remove the Front Panel Keyboard or Interface 1 Perform the Initial Front Panel Procedure 2 Slide the front panel over the type N connectors Figure 14 6 Location of A1 and A2 components 14 8 Assembly Replacement and Post Repair Procedures ...

Page 465: ...ade of a small at screwdriver into the slots on the sides of the ribbon cable connector item 14 Gently pry upwards on either side of the connector until it is loose 7 Remove the remaining seven screws from the A1 assembly item 15 Reverse Removal Procedure to Reinstall After reinstallation refer to Post Repair Procedures at the end of this chapter to ensure that the analyzer operates properly Assem...

Page 466: ... Figure 14 7 Location of Source Parts 3 Disconnect the semi rigid cables item 18 at the bulkhead connector and source 4 Pull the two retention clips item 19 at the front and rear of the source module to an upright position 5 Push the disconnected cables toward the right side of the analyzer 6 Pull up on the source bracket handle item 20 and remove the source 14 10 Assembly Replacement and Post Rep...

Page 467: ...n slide into the guides at the front and back of the source compartment Make sure the source is well seated in the motherboard connector Remember to push down the retention clips After reinstallation refer to Post Repair Procedures at the end of this chapter to ensure that the analyzer operates properly Assembly Replacement and Post Repair Procedures 14 11 ...

Page 468: ...A15 Preregulator How to Remove the Preregulator 1 Perform the Initial Rear Panel Procedure Figure 14 8 Location of Preregulator Fasteners and Wires 14 12 Assembly Replacement and Post Repair Procedures ...

Page 469: ... A8 post regulator board assembly 4 Disconnect the A15 wires item 24 from the motherboard 5 Pull the preregulator assembly free from the frame Reverse Removal Procedure to Reinstall After reinstallation refer to Post Repair Procedures at the end of this chapter to ensure that the analyzer operates properly Assembly Replacement and Post Repair Procedures 14 13 ...

Page 470: ... Rear Panel Fasteners 2 Remove the hex screws item 26 Figure 14 9 from the HP IB connector and the test set interconnect connector 3 Remove the hex nuts and lock washers item 27 from the AUX INPUT EXT AM and EXT TRIGGER BNC connectors 4 Remove the rear panel board assembly 14 14 Assembly Replacement and Post Repair Procedures ...

Page 471: ...install Note Torque the hex screws to 4 in lb maximum After reinstallation refer to Post Repair Procedures at the end of this chapter to ensure that the analyzer operates properly Assembly Replacement and Post Repair Procedures 14 15 ...

Page 472: ...splay How to Remove the Display 1 Remove the power cord and the top cover see Cover Removal Procedure Figure 14 10 Location of Display Fasteners and Parts 14 16 Assembly Replacement and Post Repair Procedures ...

Page 473: ...hield item 33 9 Start to slide the display out of the instrument by pushing on the back of the display assembly There is a hole at the rear of the display shielding where you can reach in to push the display How to Reinstall the Display 1 Remove and set aside the bottom shield attached to the replacement display Install the bottom shield on the old display assembly before it is returned for repair...

Page 474: ...ional Coupler How to Remove the Directional Coupler 1 Perform the Initial Front Panel Procedure Figure 14 11 Location of Coupler Screws on Bottom Front Frame 14 18 Assembly Replacement and Post Repair Procedures ...

Page 475: ...er 6 Remove the right side front handle item 37 Figure 14 12 Location of Directional Coupler Hardware 7 Remove the screw on the side edge of the frame item 38 8 Disconnect the semi rigid cables from the coupler 9 Remove the coupler and bracket from the analyzer 10 Remove the screws item 39 that fasten the bracket to the coupler 11 Disconnect any remaining cables from the coupler Reverse Removal Pr...

Page 476: ...wire bundle from its motherboard connector item 40 Figure 14 13 3 Remove the Torx screws item 41 from the four corners of the fan Reverse Removal Procedure to Reinstall After reinstallation refer to Post Repair Procedures at the end of this chapter to ensure that the analyzer operates properly 14 20 Assembly Replacement and Post Repair Procedures ...

Page 477: ...rning Battery A9BT1 contains lithium Do not incinerate or puncture this battery Dispose of the discharged battery in a safe manner Replacing the Battery 1 Make sure the new battery is inserted into the A9 board with the correct polarity 2 Solder the battery into place 3 Replace the A9 CPU board Assembly Replacement and Post Repair Procedures 14 21 ...

Page 478: ... Bus CC Test 46 RF Output Power Test 47 Source Pretune Test 48 Frequency Response CC Tests 53 and 57 Cavity Oscillator CC Test 54 Source Spur Avoidance Tracking EEPROM Backup Disk Re ection Test Port Output Power Range and Level Linearity A4 A5 A6 Samplers A9 CC Jumper Position Frequency Response CC Tests 53 and 57 IF Ampli er CC Test 51 EEPROM Backup Disk Test Port Crosstalk A7 Pulse Generator A9...

Page 479: ...mpli er CC Test 51 EEPROM Backup Disk Transmission Test Port Input Noise Floor Test Port Crosstalk System Trace Noise A11 Phase Lock A9 CC Jumper Position Analog Bus CC Test 46 Pretune Default CC Test 45 Source Pretune CC Test 45 EEPROM Backup Disk Re ection Test Port Output Frequency Range and Accuracy A12 Reference High Low Band Transition Frequency Accuracy Re ection Test Port Output Frequency ...

Page 480: ...isk Veri cation A3A5 Step Attenuator A9 CC Jumper Position RF Output Power CC Test 47 EEPROM Backup Disk Re ection Test Port Output Power Range and Level Linearity A3AT1 4 dB Attenuator A9 CC Jumper Position RF Output Power CC Test 47 EEPROM Backup Disk Re ection Test Port Output Power Range and Level Linearity 8 dB Attenuator A9 CC Jumper Position RF Output Power CC Test 47 EEPROM Backup Disk Re ...

Page 481: ...l Certi cation Hewlett Packard Company certi es that this product met its published speci cations at the time of shipment from the factory Hewlett Packard further certi es that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other Interna...

Page 482: ...0144 Arlington Heights IL 60005 303 649 5512 404 648 0000 847 342 2000 New Jersey Texas Hewlett Packard Co Hewlett Packard Co 150 Green Pond Rd 930 E Campbell Rd Rockaway NJ 07866 Richardson TX 75081 201 586 5400 214 231 6101 EUROPEAN FIELD OPERATIONS Headquarters France Germany Hewlett Packard S A Hewlett Packard France Hewlett Packard GmbH 150 Route du Nant d Avril 1 Avenue Du Canada Hewlett Pac...

Page 483: ...Ltd 38 Bei San Huan X1 Road 9 1 Takakura Cho Hachioji 150 Beach Road Shuang Yu Shu Tokyo 192 Japan 29 00 Gateway West Hai Dian District 81 426 60 2111 Singapore 0718 Beijing China 65 291 9088 86 1 256 6888 Taiwan Hewlett Packard Taiwan 8th Floor H P Building 337 Fu Hsing North Road Taipei Taiwan 886 2 712 0404 Shipment for Service If you are sending the instrument to Hewlett Packard for service sh...

Page 484: ...ly performed or adhered to would result in damage to or destruction of the instrument Do not proceed beyond a caution note until the indicated conditions are fully understood and met Warning Warning denotes a hazard It calls attention to a procedure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning note until the indicated conditi...

Page 485: ...structions in the documentation CE The CE mark is a registered trademark of the European Community If accompanied by a year it is when the design was proven ISM1 A This is a symbol of an Industrial Scienti c and Medical Group 1 Class A product CSA The CSA mark is a registered trademark of the Canadian Standards Association Safety and Licensing 15 5 ...

Page 486: ... the voltage of the power supply and the correct fuse is installed Caution If this product is to be energized via an autotransformer make sure the common terminal is connected to the neutral grounded side of the mains supply Servicing Warning No operator serviceable parts inside Refer servicing to quali ed personnel To prevent electrical shock do not remove covers Warning These servicing instructi...

Page 487: ...instrument The front panel switch is only a standby switch and is not a LINE switch Warning The power cord is connected to internal capacitors that may remain live for 10 seconds after disconnecting the plug from its power supply Warning The analyzer s internal battery contains lithium Do not incinerate or puncture this battery Dispose of the discharged battery in a safe manner Warning For continu...

Page 488: ......

Page 489: ... 9 A10 check by substitution or signal examination 8 8 A10 digital IF 12 29 digital control 12 11 A10 Digital IF 10 36 A11 input signals 7 37 A11 Input Signals 7 38 A11 phase lock 10 37 source 12 15 A11 phase lock and A3 source check 7 8 A11 phase lock check 7 37 A12 digital control signals check 7 23 A12 reference 10 44 source 12 14 A12 reference check 7 13 A13 A14 Fractional N Check 7 24 A13 fra...

Page 490: ...ce high band theory 12 19 low band theory 12 16 removal 14 10 source 12 15 theory of operation 12 3 12 14 A3 source and A11 phase lock check 7 8 A4 R sampler mixer 12 28 A4 sampler mixer check 7 6 A5 A sampler mixer 12 28 A6 B sampler mixer 12 28 A7 pulse generator source 12 14 A7 pulse generator check 7 33 A8 fuses and voltages 5 14 A8 post regulator air ow detector 12 8 display power 12 9 green ...

Page 491: ...test 47 3 11 serial number correction constant test 55 3 32 source default correction constants test 44 3 8 source pretune correction constants test 48 3 14 source pretune default correction constants test 45 3 9 source spur avoidance tracking 3 58 test equipment speci cations 3 3 vertical position and focus 3 43 when to perform 3 1 adjustments test equipment speci cations 1 1 adjustment tests 10 ...

Page 492: ...6 A1 front panel keyboard 14 8 A2 front panel interface 14 8 A30 directional coupler 14 18 A3 source 14 10 A9BT1 battery 14 21 B1 fan 14 20 covers 14 3 front panel 14 4 rear panel 14 6 tools 14 2 assembly replacement sequence 4 2 assistance 15 1 attenuator theory of operation 12 3 attenuators xed 1 3 attenuator step 1 3 AUX OUT ON OFF 10 27 available options 1 7 B B1 fan removal 14 20 bad cables 9...

Page 493: ...port 50 transmission tracking 2 7 type N test port 75 2 7 type N test port 75 directivity 2 7 type N test port 75 load match 2 8 type N test port 75 re ection tracking 2 8 type N test port 75 source match re ection 2 7 type N test port 75 source match transmission 2 8 type N test port 75 transmission tracking 2 8 chassis part numbers 13 28 check 1st LO signal at sampler mixer 8 12 4 MHz REF signal...

Page 494: ...ler HP IB address 4 7 controller troubleshooting 4 9 conventions for symbols 10 52 correction constants 3 1 initialize EEPROMs test 58 3 37 CORRECTION CONSTANTS NOT STORED 10 55 CORRECTION TURNED OFF 10 55 counter 10 25 COUNTER OFF 10 27 counter frequency 1 3 counter readout location 10 41 cover removal 14 3 CPU digital control 12 11 CPU operation check 6 4 CPU walking one pattern 6 16 CRT demagne...

Page 495: ... 8 10 digital IF 10 36 12 29 digital control 12 11 digital voltmeter 1 3 directional coupler removal 14 18 directivity characteristics type N test port 50 2 6 type N test port 75 2 7 directivity ED 11 11 disable shutdown circuitry 5 16 DISK not on not connected wrong addrs 10 56 disk drive check 4 8 disk drive external HP IB address 4 7 disk oppy 1 3 DISK HARDWARE PROBLEM 10 56 DISK MESSAGE LENGTH...

Page 496: ...bers correction constant adjustment 3 34 RF output power correction constants adjustment 3 11 serial number correction constant adjustment 3 32 source default correction constants adjustment 3 8 source pretune correction constants adjustment 3 14 source pretune default correction constants adjustment 3 9 source spur avoidance tracking adjustment 3 58 vertical position and focus adjustments 3 43 eq...

Page 497: ... REMOTE 10 63 TEST ABORTED 10 63 TROUBLE CHECK SETUP AND START OVER 10 63 WRONG DISK FORMAT INITIALIZE DISK 10 63 error correction procedure 11 4 error message for phase lock 7 4 error messages 10 1 10 54 during adjustments 3 1 error messages for receiver failure 8 2 error term inspection 9 3 error terms 11 1 directivity ED 11 11 isolation crosstalk EX 11 17 re ection tracking ER 11 15 source matc...

Page 498: ...art numbers 13 8 front panel cables 13 14 front panel hardware 13 14 front panel interface removal 14 8 front panel keyboard digital control 12 10 removal 14 8 front panel key codes 6 8 front panel probe power voltages 5 19 front panel processor digital control 12 11 front panel removal 14 4 front panel troubleshooting 6 7 Fr Pan Diag 10 12 Fr Pan Wr Rd 10 10 functional group fault location 4 10 f...

Page 499: ...onal N frequency range 3 46 adjust vertical position and focus 3 43 backup the EEPROM to disk 3 38 clean connectors 1 5 degauss demagnitize the display 3 45 identify the faulty functional group 4 10 initialize EEPROMs 3 37 ship analyzer for service 15 3 troubleshoot accessories 9 1 troubleshoot broadband power problems 7 40 troubleshoot digital control group 6 1 troubleshoot receiver 8 1 troublesh...

Page 500: ...10 L INTCOP as trigger to observe data lines 8 10 L LB and L HB Lines 7 24 LO 2ND waveforms 7 21 load device veri cation 9 4 load match characteristics type N test port 50 2 7 type N test port 75 2 8 location diagnostic LEDs for A15 5 4 post regulator test points 5 5 power supply cable 5 8 lock error 7 4 LO OUT waveform at A14J2 7 28 LOSS SENSR LISTS 10 5 low band REF signal 7 18 low pass lter 1 3...

Page 501: ...10 59 PHASE LOCK CAL FAILED 10 59 PHASE LOCK LOST 10 60 POSSIBLE FALSE LOCK 10 60 POWER SUPPLY HOT 10 61 POWER SUPPLY SHUT DOWN 10 61 POWER UNLEVELED 10 60 POW MET INVALID 10 60 POW MET not on not connected wrong addrs 10 61 POW MET NOT SETTLED 10 60 PRINTER not on not connected wrong addrs 10 61 PROBE POWER SHUT DOWN 10 62 SAVE FAILED INSUFFICIENT MEMORY 10 62 SELF TEST n FAILED 10 62 SOURCE POWE...

Page 502: ...unt ange kit without handles 1 7 1CP rack mount ange kit with handles 1 8 AFN add 50 test port cable 1 8 AFP add 75 test port cable 1 8 B02 external disk drive 1 8 descriptions of 13 40 options available 1 7 oscilloscope 1 3 oscilloscope check of reference frequencies 7 15 output frequency in SRC tune mode 7 8 overall block diagram 4 16 OVERLOAD ON INPUT R POWER REDUCED 10 59 OVERLOAD ON REFL PORT...

Page 503: ...ost Reg 10 10 post regulator air ow detector 12 8 display power 12 9 green LEDs 12 8 probe power 12 9 shutdown circuit 12 8 theory of operation 12 8 variable fan circuit 12 8 post regulator fuses part numbers 13 30 post regulator test point locations 5 5 post repair procedures 14 22 power from source 7 3 POWER LOSS 10 5 10 6 power meter HP IB 1 3 power meter HP IB address 4 7 power problems broadb...

Page 504: ...nge Adjustment 3 46 Fractional N Spur Avoidance and FM Sideband Adjustment 3 54 Frequency Accuracy Adjustment 3 49 Frequency Response Correction Constants Tests 53 and 57 3 22 High Low Band Transition Adjustment 3 51 IF Ampli er Correction Constants Test 51 3 19 Initialize EEPROMs Test 58 3 37 Model Number Correction Constant Option 075 Only 3 42 Option Numbers Correction Constant Test 56 3 34 RF ...

Page 505: ...l At A11TP9 7 17 removing A8 5 14 line fuse 5 7 REPEAT ON OFF 10 5 replaceable parts 13 1 abbreviations 13 40 accessories 13 38 cables 13 12 13 14 13 16 13 18 25 chassis 13 28 display bezel 13 26 front panel 13 8 hardware 13 14 13 16 13 30 13 32 13 34 13 35 13 36 labels 13 37 major assemblies 13 6 miscellaneous 13 38 option descriptions 13 40 ordering 13 4 post regulator fuses 13 30 rear panel 13 ...

Page 506: ...justment 3 55 phase lock error troubleshooting 7 4 setup check for disk drive 4 8 setup check for plotter or printer 4 8 short and open device veri cation 9 6 shutdown circuit post regulator 12 8 shutdown circuit on A8 12 8 shutdown circuitry disable 5 16 signal examination for phase lock 7 37 signal separation A30 dual directional coupler 12 23 built in test set 12 23 theory of operation 12 23 si...

Page 507: ...e locked output compared to open loop 7 9 SRC tune mode waveform integrity 7 9 SRC TUNE ON OFF 10 20 stable HI OUT signal in FRACN TUNE mode 7 35 static control table mat and earth ground wire 1 3 status terms for test 10 4 step attenuator 1 3 STORE EEPR ON OFF 10 23 stuck key identi cation 6 8 support and service options 1 9 SWEEP MODE CHANGED TO CW TIME SWEEP 10 63 Sweep Trig 10 10 symbol conven...

Page 508: ... 10 17 Test Pat 7 10 17 Test Pat 8 9 10 17 test patterns 10 3 test port connector inspection 9 3 tests adjustments 10 14 display 10 16 external 10 12 internal 10 7 patterns 10 17 system veri cation 10 13 tests diagnostics 6 11 test set 12 23 theory of operation 12 4 tests menu 10 3 test status terms 10 4 theory of operation 12 1 5V digital supply 12 7 A15 green LED 12 7 A15 preregulator 12 6 A15 r...

Page 509: ... lock error 7 4 plotters or printers 4 8 receiver 8 1 self test 4 3 source 7 1 systems with controllers 4 9 systems with multiple peripherals 4 9 when all inputs look bad 8 7 YO coil drive check with analog bus 7 11 troubleshooting power supply 5 1 troubleshooting source group appendix 7 39 U uncertainty measurement 2 4 measurement window 2 4 uncorrected performance 11 9 USE SENSOR A B 10 6 V vari...

Page 510: ...ty in SRC tune mode 7 9 wrist strap and cord antistatic 1 3 WRONG DISK FORMAT INITIALIZE DISK 10 63 Y YO coil drive check with analog bus 7 11 YO0 and YO coil drive voltage di erences with SOURCE PLL OFF 7 13 Index 22 ...

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Agilent Technologies 8752C, Service Manual

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