Agilent Technologies HP 8719D, Service Manual

Page 1: ...Service Guide Agilent Technologies 8719D 20D 22D Network Analyzers Manufacturing Part Number 08720 90292 Printed in USA Print Date February 1999 Supersedes June 1998 Agilent Technologies Inc 1996 1999...

Page 2: ...R 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...

Page 3: ...ation 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 h...

Page 4: ...7 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...

Page 5: ...Service Guide i 8719D 2OD 22D Network Analyzer Ra HEWLETT PACKARD...

Page 6: ...es no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fltness for a particular purpose Hewlett Packard shall not be liable...

Page 7: ...pide shows how to make measurementq explains commonly used features and tells you how to get the most performauce from your analyzes The Quick Reference Guide providea a summary of all available user...

Page 8: ...tion lCM Rack Mount Flange Kit Without Handles Option ICP Rack Mount Flange Kit With Handles Service and Support Options Option WO8 Option W31 Option W51 Option W32 Option W52 OptionW34 OptionW54 2 Sy...

Page 9: ...the Verification Results 2 32 1 Frequency Accuracy Performance lkst 2 35 IftheInstrumentFWs IWslkst 2 36 2 Power Flatness Performance l t 2 37 If the Instrument FWs lhis Test PowerLinearity Rxformanc...

Page 10: ...InCaseofDif ulty 3 28 Power Linearity Adjustment 3 29 Preparatory Steps 3 29 For 8722D Analyzers Only 3 30 ForAllAnalyzers 3 31 InCaseofDif3hllty 3 32 BlaukingAdjustment Ikst54 3 33 InCaseofDifkulty 3...

Page 11: ...11 Digital Control 412 Observe the Power Up Sequence firmware revisions 6 x and below 412 Observe the Power Up Sequence firmware revisions 7 xx and above 413 VerifyInternaIlbstsI ssed 415 Source 416 P...

Page 12: ...Jumper Switch Positions Checking A7 CPU Red LED Patterns For instruments with llrmware revisions 6 xX and below Checking A7 CPU Red LED Patterns F or instruments with ilrmware revisions 7 xx and abov...

Page 13: ...nd Phase Lock Problems 7 6 Swap Samplers to Check A64R Sampler 7 7 Check Open Loop Power HP 8719D 2OD only 7 8 CheckOpenLoopPower HP8722DOnIy 7 8 Check Al2 Reference 7 9 Check Al4 F ractionaI N Checks...

Page 14: ...ShortsandOpens 10 Service Key Menus and Error Messages Service Key Menus Error Messages Tests Menu Di 3pIay ksts Test Options Menu Self Diagnose Softkey Test Descriptions Intemal Iksts Extemall ests 8...

Page 15: ...SFandESR Description Reflection hcking ERFandERR IsoIation Crosstaik EXFandEXR LoadMatch ELFandELR Transnhsion I racking ETF and ETR lo 28 lo 30 lo 30 lo 31 lCK34 lo 35 lo 36 lo 37 lo 38 lo 38 lo 39 1...

Page 16: ...4 A13 Fractional N Synthesizer 12 14 A52 Pulse Generator the Harmonic Comb 12 14 A64 R Sampler Down Converthg the Signals 12 14 All Phase Lock Comparing Phase and Frequency 12 15 TuningtheYIGCkcillato...

Page 17: ...ts Outside ChassisFarts Inside 14 Assembly Replacement and Post Repair Procedures Replacing an Assembly Procedures Described in this Chapter LineFuse lbols Required Removal Replacement Covers lbolsReq...

Page 18: ...M A D S Removal 1418 Oscillator Removal 1418 A9 Source Control Board Removal 1419 Replacement 1420 A7 CPU Board Assembly 1422 IboIs Required 1422 Removal 1422 Replacement 1422 A7EBTl Battery 1424 Too...

Page 19: ...nt Markings 15 4 General Safety Considerations 15 5 Safety Earth Ground 15 5 Before Applying Power 15 5 servic lng 15 5 Compliance with German FlZ Emissions Requirements 15 6 Compliance with German No...

Page 20: ...s 15 4 General Safety Considerations 15 5 Safety Earth Ground 15 5 Before Applying Power 15 5 servicing 15 5 Compliance with German FTZ Emissions Requirements 15 6 Compliance with German Noise Require...

Page 21: ...cur A 7 A 7 Determining Expected System Performance Procedures A 9 Values lhble A 10 Measurement Uncertainty Worksheet 1 of 3 A 11 Measurement Uncertainty Worksheet 2 of 3 A 12 Measurement Uncertainty...

Page 22: ...Graphic Print Out of Verifkation Results 2 16 0buiar Print Out of Verification Results 2 17 F requency Range and Accuracy I t Setup 2 18 Power l t Setup 3 l A7 Jumper Positions Firmware revisions 6 x...

Page 23: ...RemovingtheLineF use 5 8 5 5 Power Supply Cable Locations 5 9 5 6 A15Wl plug Detail 5 11 5 7 Power Supply Block Diagram 5 23 6 l Digital Control Group Block Diagram for lhmware revisions 6 xx and bel...

Page 24: ...EDR Without Cables 11 2 Pypical ESFLESR Without Cables 11 3 Typical ERFLERR 114 TypicaIEXF E2IRwith3kBzBandwidth 11 5 Typical ELF ELR 11 6 Typical ETF ETR 12 1 Simplified System Block Diagram 12 2 Pow...

Page 25: ...or l t Point Voltages 5 2 Output Voltages 5 3 Recommended Order for Removal Disconnection for Troubleshooting the Al5 Assembly 5 4 Recommended Order for Removal Disconnection for Troubleshooting the A...

Page 26: ...ction 11 3 HP 8722D Characteristics Without Error Correction 12 1 Subsweep F requencies 13 1 Miscellaneous Replaceable Parts 13 2 Reference Designations and Abbreviations 141 Related Service Procedure...

Page 27: ...st Equipment able l l Required Ibols T 8 T 10 T 16 and T 26 TORX screwdrivers Flat blade screwdrivers small medium and large 6 16 inch open end torque wrench for SMA nuts 3 16 5 16 and g lb inch hex n...

Page 28: ...BandwidtklOO m Ba6ter graphic3 capability lkkbnix J16 lW mnix J6602 lb 01 PC m pat0le with andardDINconn B 6 mm to Ippe N f ccmwdon L4mmto7mmcoNlecton rpPeN f to7mm ded MO l IIF 6S4SA 6S6OB 6smB EP6sm...

Page 29: ...BP 861SSD E F W T lb1 Kit No mhlitute 0872 30018 AJ 2 4mm oaubmuon Kit Nomlmtltute BP86068A D P A T Hp87221 onbr 2 4mm VerMcatkm Bit Nombatitute lP86067B P W 8722Donbl 8 6mm c0l0mtion Hit Noaubetitute...

Page 30: ...g 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 typicaI...

Page 31: ...ropyl alcohol Cleanconnectorthrea f3mmector Cl Do Not u8eauyabrasiv Get Iiqllid in plastic support beads GaghgcolmectOrB Do Do Not cleanandzerothegagebeforeuse Use an out f43pec amnector USethecorrect...

Page 32: ...nuators or isolators This allows test device output levels up to the power limits of the inserted components Additionally there is an external reference input that allows the external ampliiler s freq...

Page 33: ...main response of a network by computing the inverse Fourier transform of the frequency domain response The analyzer shows the response of a test device as a function of time or distance Displaying the...

Page 34: ...ty that was automatically included with your analyzer to a three year return to HP warranty This option does not include calibration Option W31 This option adds two years of on site repair to the prod...

Page 35: ...f calibration meets the ANSUNCSL Z540 1 1994 standard If support was not purchased along with the analyzer there are many repair and calibration options available from Hewlett Packard s support organi...

Page 36: ...ts may not have been accurate A technician must wait until after the ANSIMXL 2540 1 1994 verifkation is complete before troubleshooting and repairing any problems After troubleshooting the Post Repair...

Page 37: ...nalyzer should be verBed at least once per year PRELIMINARY CHECKS I YES t 1 PERFORMAYE TESTS 1 NO TROUBLESHOOTING POST REPAIR MATRIX ADJUSTMENT PROCEDURES sb636d F3gure 2 1 ANSI NCSL 2549 l 1994 Veri...

Page 38: ...I N A R Y C H E C K S I_ A NO YES TROUBLESHOOTING POST REPAIR MATRIX ADJUSTMENT PROCEDURES YES TROUBLE HOOTlNG I I YES TROUBLESHOOTING I 2 2 Non ANSI NCSLZ549 1 1994 sb637d System Verification and 23...

Page 39: ...Connectors q Check the I t Port Cables n SystemVerilkation 0 Equipment Initialization q Measurement Calibration q Verification Device Measurements q Interpreting the VeriIication Results n Performanc...

Page 40: ...Performance llest Record The performance is specified at an ambient temperature of 23OC f3O Therefore the environmental TEMPEBATUBE MUST remain in the range of 2o C to 26OC Once the measurement calibr...

Page 41: ...he softkey label appears on attenuator setting check has failed Press attenuator settings n If the message FAIL appears on the analyzer display the analyzer failed the IIrst part of the operation chec...

Page 42: ...ith SMA connectors 1 Visually inspect all the connectors for any burrs gold flakes or places where the gold is worn Clean all the connectors with alcohol and foam tipped swabs Dry the connectors with...

Page 43: ...on If necessary refer to the operating manual for a detailed measurement calibration procedure Note If the llxedload in your calibration kit is labeled BROADBAND you can use this load in the lowbandpo...

Page 44: ...Syetem Verifkatiin and 2 9 Perfonnanm Tests...

Page 45: ...insertion loss measurements of a good cable Refer to the cable manual to see if the cable you are measuring meets its insertion loss speciilcation If it doesn t the cable should be either repaired or...

Page 46: ...ght line and press the following keys to normalize the displayed traces giiX LDirpl iZ LDirpl 4 MakeagradualOCPbendinthemid measurement averaging by pressing 5 To change the scale of the displayed tra...

Page 47: ...from the short Therefore the measured deflection value must be divided in half to reach the correct value If the cable does not meets the speciilcations in the cable manual it should be either repair...

Page 48: ...hen reconnect the cable to the test port Tighten the connection to the specilied torque for the connector type Look at trace for spikes or modes 5 lb re normalize the data trace of the reconnected cab...

Page 49: ...ach thne to compare several connections If any mode appears each time the cable is connected and reconnected measurement integrity will be affected The cable connector and or cable should be repaired...

Page 50: ...ty limits for the system verilication are the sum of the factory measurement uncertainties for the verification devices and the uncertainties associated with the system being vetied Ybu can determine...

Page 51: ...nown phase is assumed to be worst case 180 to 180 Random errors such as noise and connector repeatability are generally combined in a root sum of the squares RSS manner F or more information on determ...

Page 52: ...rds and lkclmology Traceability path for EP 8719D 20D 22D System ortlibration and Vkrifkation Smda rds What the System Vtication Vdes The system verification procedure verifies the minimum HP 871OD 20...

Page 53: ...Kit cable8 3 5 mm 7nnn N s505 2B D s505oB D s505sA B s505lA B S61SlDIF S61S2D F 861S ZD F able 2 2 Supported System Colons HP 8722D Only I Description I 2 4 mm I 3 5 mm I IVerifbtionKit I s5057B I s5...

Page 54: ...nnot be taken into account in the performance verhkation procedure See supported system configurations in Ihble 2 l and Ihble 2 2 Nibration Kit Substitution The accuracy of the analyzer when it is use...

Page 55: ...e Equipment and Anaiyzer Options chapter Good connections and clean undamaged connectors are critical for accurate measurement results Insert the veriiication kit disk into the analyzer disk drive Not...

Page 56: ...the printer type correctly refer to the HP 8719DBODL ZD Network Analyzer User s Guide for more information on how to perform these tasks Press fZ7J used and select the type of calibration kit Press jj...

Page 57: ...nalyzer Mshes measuring the standard connect the short that is supplied in the calibration kit to reference test port 1 15 Press 16 When the analyzer Wishes measuring the standard connect the 60 ohm t...

Page 58: ...standard connect the short that is supplied in the calibration kit to reference test port 2 23 Press 24 When the analyzer es measuring the standard connect the 60 ohm termination to reference test por...

Page 59: ...the calibration into the analyzer internal memory Note Step 33 is crucial to the correct recall of the calibration during ents The calibration MusTbe stored in be properly recalled 34 When the analyze...

Page 60: ...1 27 20 dB attenuatoT 2 28 4M50 dB attenuator 3 29 6ooairline 4 30 26Omismatchairline 35 36 37 38 to create page breaks in appropriate places Press G In the active entry area on the display the follo...

Page 61: ...ification limits for all four Z parameters are calculated only the uncertainties aswchted with the items indicated in the following chart will be used for the system verification The other characteris...

Page 62: ...ttenuator Enter It 29 using step keys entry keys or front panel knob Repeat steps 38 through 42 with the 5OU airline For an example of how to perform proper airline connections refer to the following...

Page 63: ...ch airline See the above figures 46 The printout of the measurements shows both a plot of the measurement when is active and a list of the measured frequencies with corresponding data The plot include...

Page 64: ...he short to reference test port 1 e FressIMeac f Press j g Check that the trace response is 0 00 f 0 05 dl3 h Disconnect the short and connect it reference test port 2 i PressLMeas j Check that the tr...

Page 65: ...four measurement parameters n Print the error terms and examine them for anomalies near the failure frequencies Refer to the Error lkrms chapter in this manual n Make another measurement calibration...

Page 66: ...I AM P MT REMEASURED I VERIFICATIO FREQUENCY WITH ONE DEVICE SUBSTITUTE VERIFICATION K I T YES I SUBSTITUTE C A L K I T SUBSTITUTE CABLES sb69d Figure2 14 VerilIcationFMlsF lowchart System Verificatio...

Page 67: ...rtainty lhnits at all frequencies QQ 6 8 STAKT 350 Ooo WO GHz STOP 13 510 000 Ooo GHz F igme 2 15 Graphic Print Out of Vetication Results 1 Upper limit points as defined by the total system uncertaint...

Page 68: ...lW a52 261 2 265 2w 23s 205 257 259 dB 19 976 dB 20 197 a d9 19 985 dB 20 208 ce dB 19 989 20 234 8 do 19 999 dB 20 246 CB 19 Qli7 dB 20 315 dB dB 20 041 dB 20 574 dB 0 036 dB 20 622 m dB 20 061 dB 2...

Page 69: ...234 Syotom riiiwtiin ad Rrfonnance Tests...

Page 70: ...Only Frequency Counter HP 5350B RF Cable HP 85131UD Required Equipment and Ibols TIP 8722D Only Frequency Counter HP 5351B RF Cable HP85133UD Analyzer zmwm up time 1 hour 1 Connect the equipment as s...

Page 71: ...1 If the frequency measured is close to specillcation limits either in or out of specilkation check the time base accuracy of the counter used 2 If the analyzer fails by a signillcant margin the maste...

Page 72: ...Sensor HP8487A Adapter 2 4 mm f to 2 4nun f HP P N 119OOB part of HP 85056B D Anulyzerwarm up time 1 hoar 1 Zero and calibrate the power meter 2 Set the calibration factor on the power meter to the a...

Page 73: ...t for 1 5 seconds to allow the power meter suficient time to settle 9 Connect the power sensor to port 2 and press Measl 10 Repeat steps 5 through 8 If the Instrument Fails This Test 1 Ensure that the...

Page 74: ...the value indicated by the power sensor c The corrected power level reading should be between the limits shown in the Performance l t Record B 4 The source relies on the power adjustment for proper p...

Page 75: ...dBm 15 dBm p8mtef dB OdBlU SdBm 6dBm OdBlU PA anf 10 aB SdBm lOdBm NA NA For 8719D 2OD Only 6 Refer to Table 24 and enter the power value for PM for the particular analyzer under test After you enter...

Page 76: ...power value listed in row P4 and subtract 10 dB to arrive at the calculated value F or 8722D Only 20 Press StopJ 20 ZJJ 21 Press 22 Refer to hble 2 4 and enter the power value for P ef for the partic...

Page 77: ...isplay and add 10 dB Write the e test record 43 Read the marker value from the analyzer display and add 10 dB Write the calculated value on the test record 44 Press 3ijYJ iTJ J 45 Repeat steps 21 thro...

Page 78: ...The source relies on the power linearity adjustment for correct performance Refer to Power Linearity Adjustment and perform the procedure Then repeat this test 3 If the analyzer repeatedly fails this...

Page 79: ...Calibration Kit HP 85056B D RF Cable Set HP85133C D Note Other calibration kits may be used if you are working in a different connector type Analyzer warm q time 1 hoar 1 Tb preset the analyzer press...

Page 80: ...yzer has the new faster CPU F irmware Revision 7 xx or greater refer to lhble 2 6 8elplpent 1 2 s 4 5 HP 871OD 5 HP 872OD 22D 6 HP 8722D able 2 6 F requency Segment Values P Nmubor of pointe 6oMIIz 50...

Page 81: ...red press 5 To set up the port 1 measurement press All 8722D IMenu 8722D without new CPU and Brmware 6 14 and below I lo for Option 007 5 dBm 6 Connect a thru RF cable between ports 1 and 2 ress CiJ 8...

Page 82: ...owing equation 20 x log 3 x Standard Deviation Mean Value Write the calculated value on the Performance I t Record 15 Repeat the previous two steps beginning with C 1 Placing marker 1 and marker 2 at...

Page 83: ...d repeat the test 2 In case of repeat failure gage the connectors see Principles of Microwave Connector Care in Chapter 1 of this manual and substitute the calibration standards and the cable 3 Rechec...

Page 84: ...udes the printout from the total system uncertainty test these test records and a certillcate of calibration Use the following sheets to record the results of the performance tests You may wish to cop...

Page 85: ...calibration hnique imbient temperature TJ hnbient temperature at measurement dibration W Eqnigmentu Jd Model Nnnnber 1 Fkequency Counter Z Power Meter I Power Sensor L spectrum r Relative Humidity Amb...

Page 86: ...Options chaptxx 13 600135 GHz 40 5 lcH2 20 000200GHz 6okHz 26 000260GHz 78lcHz lbt Deauiption HP 8719D HP 8719D Opt 007 HP 872OD HP 872OD Opt 007 HP 3722D HP 8722D Opt 007 2 odBm 3 0 dl3m 2 odBm 3 0...

Page 87: ...9DBOD 0 86dE 0 35 dB EP87 22D O OC2OffI3z 0 86dB 0 35 dB p4 HP 87lODEOD l 0 dB 1 0 dB EP8722D NA NA NA NA PowerValueSettings forlksting Ihmarity Rwer Settinr e 1 J3P 871BD 2OD 1 HP 871BDkMD 1 HP 87221...

Page 88: ...z 8to2OGHz HP8722D 0 06to0 060000101GHz 0 33OBDB899 to 0 84 GHz 0 64to2GHz 2toSGHz St 20GHz 2Oto4OGHz 1 77dEB 77dJ3 1OOdB 1OOdB 1OOdB 67dB 67dB OSdEI 03dB OldB sodB Dptlon 001 32dB 32dB 106dB 106dB 10...

Page 89: ...ced all of the correction constants must be regenerated and stored on the new assembly Alternatively the data can be retrieved from disk Hewlett Packard recommends that you store the correction consta...

Page 90: ...t 49 n Protected Option Numbers Correction Constants l t 50 n Unprotected Hardware Option Numbers Correction Constauts n Output Power Adjustments n Power Linearity Adjustment n Blauking Adjustment TJ...

Page 91: ...nel Ceyboard l f tlon correction constants al 8 2 NOllC InternalWO IntemalW12 Intemal lbt23 lntemalm3t24 FbntPtUEl ocessor None htA Ill8l 3tO IntemallW12 Intemallbt23 UlASlA6 Second hnvert4 s None Sys...

Page 92: ...3 Fractional N A14 F radonal N Digital A7 JumperBwitch Podtions AnalogB W44 SourcePretuneCC lkst43 A7 JumpedSwitch Positions Reference Assembly VC0 Tune Frequencg Accuracy A7 Jumper Sw ch Pasitiom Ana...

Page 93: ...quencyRange Power Level T t Frequency Accuracg Power Level l t Frequencg A66 Lower F ront Panel Assembly None Observation watch LED8 when switch from S11 to azz A67FlxedoBdllator Output Power wents Po...

Page 94: ...wer Level l t System Ver ation Power Level Tkst A60 Step NOlW Operation Checkt Attenuator 81 Switch None Operation Checkt HP WZD OnbT s2B3f3wttchel3 None operationcheck 64 Transfer None Operation Chec...

Page 95: ...This page is lejt intentionally blank Adjustments and Correction Constants 3 7...

Page 96: ...es must be used when performing the following step 6 Move the jumper or switch as shown in F igure 3 l or F igure 3 2 n Move the A7 jumper switch to the Alter position AU before you nm any of the corr...

Page 97: ...141d Figure 3 1 A7 Jumper Positions Firmware revisions xx and below A7 CPU Assembly I B B e fj D Normal Mode Alter Mode Rocker Slide sb61 id Figure 3 2 A7 Switch Positions F immme revisions 7 xx and a...

Page 98: ...RF cable HP 85133 2 D E F The frequency accuracy of the HP 8566B 633 spectrum analyzer is sufficient for this procedure Anal warm up the 30 mimixs This procedure generates pretune values for correct...

Page 99: ...inue appears use the front panel knob to adjust analyzer source to within 5 MHz of 19 550 GHz Press frequency is set When Pretune Adj DOIiE is displayed press w If no more correction constant routines...

Page 100: ......

Page 101: ...onnect the RF cable from Port 1 to Port 2 of the analyzer 4 Observe the analyzer for the results of the adjustment routine If IF Step Cor DOHE is displayed you have completed this procedure 5 If no mo...

Page 102: ...hree minutes 3 Observe the analyzer for the results of the adjustment routine If the analyzer displays ADC Ofs Cor DONE you have completed this procedure 4 If no more correction constant routines are...

Page 103: ...on the arrow below each char r of the instrument serial number and then Pressing enter each character Enter a total of ten characters two letters and eight dlgita Press Lc if you made a mistake Note T...

Page 104: ...does not display DOlIE then either the serial number that you entered in steps 3 and 4 did not match the required format or a serial number was already stored Check the serial number recognized by th...

Page 105: ...exposed sheet metal next to the A7 CPU assembly Note that each keyword is for EACH option installed in the instrument 2 Make sure the A7 jumper switch is in the Alter position AIT n If the instrument...

Page 106: ...ant routines are going to be performed return the A7 jumper switch to the Normal position NRM In Case of Diilkmlty 1 If the analyzer dlsplays Option Cor FAIL check the keyword used in step 2 and make...

Page 107: ...peciiic installed bar enabled or disabled Follow the address entry by n Pressing n Pressing 1 Lxl after an address entry enables the option Lxl after an address entry disables the option Jhble 3 2 PEE...

Page 108: ...8 When you have entered all of the hardware options return the A7 jumper switch to the Normal position NRM 9 Perform the EEPROM Backup Disk Procedure located on page 3 34 In Case of DMkulty If any of...

Page 109: ...rt of 85056B D Cable 2 4 mm f to 2 4 mm f 85133 60016 An zer uxzrm up time 30 minutes 1 Prepare the power meter for use Refer to Power Meter Measurement Calibration in Chapter 5 of your analyzer s Use...

Page 110: ...Set the potentiometers to the minimum levels 4 Set the low band power potentiometer A59 R4 full counter clockwise 5 Set the offset potentiometers A59 R70 R71 RBO to their full counter clockwise posit...

Page 111: ...R70 R71 RL BLANKING II v u V sb681d Figure 3 4 Location of Output Power Adjustments Start the Adjustment 7 Connect the power sensor to T t port 1 Adjustments and Correction Constants 3 23...

Page 112: ...Power A in lhble 3 4 able 3 4 OutputPowerAdjustmentValues Model Option Power A dBm HP 8719 2OD 7 HP 8719 2OD Option 007 HP 8722D1 HP 8722D Option 007 1Alloptions optionoo7 12 3 2 Power B dBm 1 Power...

Page 113: ...4 Press MenuJ 25 Adjust the low band power slope resistor A59 R86 for a power meter reading that is equal to the value listed under Power B in Ihble 3 4 must High Band Pbwer 8722D ONIX 27 Adjust the h...

Page 114: ...rt 1 through cable and press See Figure 3 5 I 0 I NETWORK ANALYZER 8485A B487A POWER SENSOR sb6162d F gure 8 6 OntputPowerAdjustmenta Wait for the analyzer to Msh the power meter calibration Note The...

Page 115: ...of hble 3 4 and then press The analyzer s trace now represents power flatness 46 Adjust the slope and offset of all the bands for a flatness of fl dB to 20 GHz f2 5 to 40 GHz Refer to the column Power...

Page 116: ...from 0 to 4005 The power should vary from approximately 33 dB to 4 dB from the maximum speciiled power w If the analyzer is not operating correctly as indicated from the results of the previous step...

Page 117: ...ss LMenu _ _ f and enter the power value listed as P3 in IWe 3 5 and then press xl able 3 6 PowerLima y Adjustmentk daes Ftwerfhttin EPBllSD 2OD EP871SDf2OD DPST22D DP8722D options options Pl l 6dBm 1...

Page 118: ...centered around 10 11 12 13 the reference Ii Record the MAIN POWER DAC number lb switch off the power DAC press Press w Divide the previously recorded DAC number by 256 14 Store the remainder by press...

Page 119: ...he trace is centered on the reference continue with step 27 lb switch on the power DAC press m B xl Adjust the front panel knob until the measurement trace is centered around the reference line Record...

Page 120: ...not passing the Power Linearity Performance Test check for available power and modulator functionality by adjusting the power DAC from 0 to 4095 refer to the Output Power A stments procedure The powe...

Page 121: ...85056B D Analyzer warm up time 30 minutes l his adjustment sets the output power level during retrace If incorrectly adjusted the first data points in a sweep may not be stable 1 Remove the instrumen...

Page 122: ...NG sb681d Figure 3 6 Location of Blanking Adjustment In Case of DiEiculty If you are unable to perform this adjustment refer to the Source Troubleshooting chapter in this manual 334 Mjustmmta and Corr...

Page 123: ...ion number correction constants lksts 49 and 50 respectively 1 2 Restore the analyzer correction constants in the EEPROMs by referring to Correction Constants Retrieval Procedure located later in this...

Page 124: ...disk is not formatted follow these steps a Press jj b Select the format type n lb format a ID disk select n lb format a DOS disk select c Press Note The analyzer creates a default file TILEO The iile...

Page 125: ...5 Write the following information on the disk label n analyzer serial number n today s date n EEPROM Backup Disk Mjusbnrnts andCorrectionConstauts 337...

Page 126: ...position Pr Use the front panel knob to esents the file name of the EEPROM data for the analyzer On the factory shipped EEPROM backup disk the flIertame is FILEl Press the instrument EEPROMs to downlo...

Page 127: ...operational instrument whose CPU board has not been changed 1 l urn off the network analyzer 2 Insert the firmware disk into the instrument s disk drive 3 Turn the instrument on The llrmware will be...

Page 128: ......

Page 129: ...cating the version of firmware that was loaded Note Any time the A7 CPU assembly is replaced all of the correction constants must be regenerated or recalled and stored on the new CPU assembly Hewlett...

Page 130: ......

Page 131: ...nalyzer 2 Remove the instrument top cover 3 If the VCO TUNE adjustment screw is not accessible from the top of the Al2 assembly perform the following step If the screw is accessible continue with step...

Page 132: ...guhr waveform If so slowly tune through the entire adjustment range to obtain a flat trace then carefully tune for O OV Once the adjustment is done it should be rechecked with the reference board rein...

Page 133: ...22D Only HP 85133C D 2 4 mm f to 3 5 mm m adapter HP 8722D only HP 11901D Non metallic Adjustment lb01 8830 0024 Antistatic Wrist Strap 9300 1367 Antistatic Wrist Strap Cord 9300 0980 Static control l...

Page 134: ...OT connected 3 For Option lD5 Instruments Only Remove the rear panel BNC to BNC jumper that is connected between the EXT REF and the 10 MHz Precision Reference as shown in Figure 3 10 4 Press 1MenE an...

Page 135: ...ADJ see Figure 3 9 for a frequency measurement within specif cations vcxo ADJ R e d Note Fignre 3 9 Location of the VCXO ADJ Adjustment To increase the accuracy of this adjustment the following steps...

Page 136: ...I L I T Y FREQUENCY ADJUST sb629d Fignre 3 10 High Stability F requency AdjustmentLocation 9 Insert a narrow screwdriver and adjust the high stability frequency reference potentiometer for a CW frequ...

Page 137: ...nd Earth Ground Wire 9300 0797 HP 8719D 2OD Adapter 3 5 mm to Type N f HP 1152545 HP 8722D Adapter 2 4mm to 7 mm HP 851303 HP 8722D Adapter Type N f to 7 mm HP 11524A Analyzer warmvup time 30 mhdes Th...

Page 138: ...1 Fractional N Spur Avoidance and FM Sideband Adjustment Setup 3 Set the spectrum analyzer measurement parameters as follows Reference Level OdBIU Resolution Bandwidth lOOH Center Frequency 2 3451 GHz...

Page 139: ...e network analyzer press C j L iiiE m 8 Adjust the API1 R35 for a null minhuum amplitude on the spectrum analyzer 9 On the spectrum aualyzer set the center frequency for 530 0066 MHz 10 On the network...

Page 140: ...null minhuum amplitude on the spectrum analyzer In Case of Difkulty 1 If this adjustment can not be performed satisfactorily repeat the entire procedure 2 If the analyzer repeatedly fails this adjust...

Page 141: ...s at fault n Locate the specMc 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 Observ...

Page 142: ...ts B 5 Perform the necessary performance tests Refer to Chapter 2 System Verification and Performance Ilesta Having Your Analyzer Serviced The analyzer has a one year on site warranty where available...

Page 143: ...MESSAGES APPEAR IN SEOVENCE N TlALlZlNG INSTR YENT P L E A S E WAIT SELF TEST PASSED1 LL M NATES DURING AND AFTER PRESET PARAMETERS APPEAR AFTER PRESET ILLUMINATES ILLUMINATES 4 SECONDS AFTER PRESET...

Page 144: ...g M A G 1DdB R E F OdB S T A R T 0 0 5 GHz S T O P 1 3 5 GHz HP8719D S T A R T 0 0 5 GHz S T O P 2 0 0 GHz HP6720D 0 S T A R T 0 0 5 GHz S T O P 4 0 0 GHz HP6722D ILLUMINATES 4 SECONDS DURING PRESET s...

Page 145: ...trace is switch repeatability The remaining parts of both tests exercise the internal attenuator in 6 dB steps over a 55 dB range The resulting measurements must fall within a limit testing window to...

Page 146: ...ss the step key The display should show TEST 22 Op Ck Port 2 in the active entry area 8 Repeat steps 3 through 7 9 If both tests pass the analyzer is about 80 verified If either test fails refer to St...

Page 147: ...that the device addresses will be recognized by the analyzer The factory default addresses are I Device HP 8719Di20D122D Plotter port Print4x port Disk external Controller Power meter HP IB Addrem 16...

Page 148: ...or the Step 4 bulty Group Isolation section in this chapter q If the result is not a copy of the analyzer display refer to Chapter 6 Digital Control Troubleshooting n If Using an External Disk Drive...

Page 149: ...check their functionality Any problems observed are in the peripherals cables or are address problems see above lkoubleshooting Systems with Controllers Passing the preceding checks indicates that the...

Page 150: ...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 informa...

Page 151: ...ld be on RED LED GREEN LED LINE VOLTAGE NORMALLY OFF NORMALLY ON SELECTOR SWITCH sb616d Figure 4 4 Al5 PremguIator LEDs Check the A8 Post Regulator LEDs Remove the analyzer s top cover Switch on the p...

Page 152: ...after a few seconds except the CH 1 LED At the same moment the port 2 LED goes off and the port 1 LED ilhunhmtes SeeFigure5 n The display should come up bright with no irregularity in colors n F our r...

Page 153: ...illuminate 2 The port 2 LED ihminate 3 The amber LEDs go off after a few seconds except the CH 1 LED At the same moment the port 2 LED goes off and the port 1 LED illuminates See Figure 46 w The displ...

Page 154: ...ILLUMINATES DURING AND AFTER PDWER UP L ILLUMINATES 4 SECONDS DURING PMHER UP ILLUMINATES AFTER PDWER UP sb6166d Figure 46 Front F awl Power Up Sequence 4 14 Start Tmublrshootir Hem...

Page 155: ...the analyzer indicates a specific test failure refer to Chapter 6 Digital Control Troubleshooting The analyzer reports the first failure detected q If the analyzer indicates failure but does not ident...

Page 156: ...aborted a calibration attempt n POSSIBLE FALSE LOCK The analyxer is achieving phase lock but possibly on the wrong harmonic comb tooth n SWEEP TIEE TOO FAST The fractional N and the digital lF circui...

Page 157: ...k Press itEE instrument on the analyzer to initialize the P 8719D 20D press LMENUJ to check power at 1 GHz a Option 007 xl F or the HP 8722D press m to check power at 1 GHz L loJ ZJ Option 007 XJ On t...

Page 158: ...the HP 8722D press Q repeatedly to check power at 2 5 10 20 and 40 0 GHz The power should be within f2 dBm of the set value 10 Press and connect the power sensor to port 2 Repeat the measurement from...

Page 159: ...ode 9 c7 EI_ S C A L E R E F M j __ _ The display should resemble F igure 4 8 If any of the above procedures provide unexpected results or if error messages are present refer to Chapter 7 Source Troub...

Page 160: ...how a b Connect an open or short calibration standard to port 1 Press at input A port 1 The trace should resemble Figure 49 belo minimm of about 35 dB at 50 MHz and a value around 5 f2 dB aIO dB Optio...

Page 161: ...en press g _ _ to drive po 2 Again e trace otid have the same characteristics as described in the preceding step Switch Repeatability Calibration does not compensate for the repeatability of the tran...

Page 162: ...correct measurements suspect the system accessories Accessories such as RF or interconnect cables calibration or veriWation kit devices and adapters can all induce system problems Reconfigure the syst...

Page 163: ...oversized art 08720 90292 art sb6122d hpg F igure 411 HP 8719D 20D 22D Overall Block Diagram Start Troublrrhooting Hen 4 23...

Page 164: ......

Page 165: ...4 24 artTroubleshootingHen...

Page 166: ......

Page 167: ...4 26 Start Troubleshooting Hen...

Page 168: ......

Page 169: ......

Page 170: ......

Page 171: ...ppears on the display refer to Error Messages near the end of this chapter q the fan is not working refer to Fan Troubleshooting in this chapter The power supply group assemblies consist of the follow...

Page 172: ...Power Supply Troubleshooting Flowchart 6 2 Power Supply Troubleshooting...

Page 173: ...faulty assembly 2 Order a replacement assembly Refer to Chapter 13 Replaceable Parts 3 Replace the faulty assembly and determine what adjustments are necessary Refer to Chapter 14 Assembly Replacement...

Page 174: ...ecifk connector pin numbers I i i k i i A i I _ A8 POST REGULATOR 1 I A15Wl c I I 5vrJ I I S W I T C H I N G 25V I 1 L I N E POWER P O W E R S U P P L Y 1w I FAN POWER AND h av I REGULATORS MICROCIRCU...

Page 175: ...on the bottom green LED is on and the top red LED is off If these LEDs are normal then Al5 is 95 verified Continue to Check the Green LEDs on A8 n q If the green LED is not on steadily refer to If the...

Page 176: ...ower supply is verified lb conf m the last 5 uncertainty of the power supply refer to Measure the Post Regulator Voltages next q If any LED on the A8 post regulator is off or flashing refer to If the...

Page 177: ...lkst Point Voltages SUPP4 ponee 65 V Not Uned 64 6 to 55 4 AQND Illa svD 4 9 to s s sDl8 n s 15v 14 4 to 15 6 12 6 FT Not Used 12 1 to 12 8 lSV 14 5 to 15 5 sVU 6 05to 5 25 5 2 V 5 0 to 5 4 22v 21 3 t...

Page 178: ...line voltage to see that they are all correct F igure 64 shows how to remove the line fuse using a small flat blade screwdriver to pry out the fuse holder J igure 5 2 shows the location of the line v...

Page 179: ...3 Switch on the analyzer and observe the red LED on A15 q If the red LED goes out the problem is probably the A8 post regulator Continue to Verify the Al5 Preregulator to ilrst verify that the inputs...

Page 180: ...thin tolerance Al5 is verified Continue to Check for a Fhulty Assembly m l ble 5 Z Output Voltages Pill a15w1Pl DilBa3nue cted A8J2 connected VokBgw A15 rlunamonic Voltagee 1 looto l26 08to 76 9 7ov n...

Page 181: ...l n AlSWl connecting to the A8 post regulator n the SVCPU Iine through the motherboard n the SVDIG Iine through the motherboard Do the foIIowing 1 Mtch off the anaIyzer 2 Ensure that AlSWl is reconnec...

Page 182: ...r from it is faulty q If the red LED is still on after you have checked all of the assemblies listed in Ihble 6 3 continue to Check the Operating lkmperature I ble 5 3 Recommended Order for Removal Di...

Page 183: ...he end of this chapter q If there does not appear to be a temperature problem it is likely that Al5 is faulty Inspect the Motherboard If the red LED is still on after replacement or repair of A15 swit...

Page 184: ...5VD are still off or fia ing continue to Check the A8 Fuses and Voltages q If all LEDs are now on steadily except for the 5VD LED the Al5 preregulator and A8 post regulator are working properly and t...

Page 185: ...nect ASPl 4 Switch on the analyzer and observe the green LEDs on A8 q If any of the green LEDs are off or fkshing it is not likely that any of the assemblies listed above are causing the problem Conti...

Page 186: ...ble the protective circuitry for a short time forcing on the supplies including shorted supplies with a 100 duty cycle caution Damage to components or to circuit traces may occur if A8TP4 SDIS is shor...

Page 187: ...Table 5 4 also lists any associated assemblies that are supplied by the assembly that is being removed After each assembly is removed or disconnected switch on the analyzer and observe the LEDs Note...

Page 188: ...d Tb Bemeve Dieconnection lUethod th8t Receive Power from the Bemoved Awembl Inspect the Motherboard Inspect the Al7 motherboard for solder bridges and shorted traces In particular inspect the traces...

Page 189: ...there should be at least 15 cm 6 in spacing behind and all around the analyzer to allow for proper ventilation Check the Fuses and Isolate A8 Check the fuses associated with each of these supplies ne...

Page 190: ...ated on A8 but changes the voltage to the fan depending on airflow and temperature information Its voltage ranges from approximately 1 0 volts to 14 7 volts and connects to the Al7 motherboard via pin...

Page 191: ...pressing FiZGFj l X k2WW typically signal a power supply or A7 CPU problem Since the A7 CPU assembly is the easiest to substitute do so If the problem ceases replace the A7 If the problem continues re...

Page 192: ...6 22 Power Supply Troubleshooting...

Page 193: ......

Page 194: ...of the following n Al front panel keyboard w A2 front panel interface n A7 CPU n A10 digital IF n Al6 rear panel n Al8 display n A19 GSP Begin with CPU Troubleshooting n then proceed to the assembly...

Page 195: ...faulty assembly 2 Order a replacement assembly Refer to Chapter 13 Replaceable Parts 3 Replace the faulty assembly and determine what adjustments are necessary Refer to Chapter 14 Assembly Replacemen...

Page 196: ......

Page 197: ...64 Digital Control Troubleshooting...

Page 198: ......

Page 199: ...6 6 Digital Control Troubleshooting...

Page 200: ...Digital Control Troubleshooting 6 7...

Page 201: ...et the analyzer on its side 3 Remove the two comer bumpers from the bottom of the instrument with a T 15 TORX screwdriver 4 Loosen the captive screw on the bottom cover s back edge 5 Slide the cover t...

Page 202: ...Figure 6 3 A7 Jumper Positions Firmware revisions 6 xx and below A7 CPU Assembly s400 I Normal Mode Alter Mode Rocker Slide sb6165d Figure 6 4 A7 Switch Positions Firmware revisions 7 xx and above Di...

Page 203: ...Figure 6 5 1 Cycle the power Cycle the power on the analyzer and observe the four red LEDs All four LEDs should be on momentarily after power up If the four LEDs did not turn on replace the A7 CPU af...

Page 204: ...ubleshooting A19 AH n q If the right LED does not remain on replace the A7 CPU assembly and repeat the three LED pattern checks q If the LEDs are held in any one of the patterns shown in Ihble 6 1 and...

Page 205: ...observe the five red LEDs After an initial pattern the five red LEDs on the A7 CPU board should remain off n If the LEDs remained off then proceed to the assembly that you suspect has a problem n If t...

Page 206: ...mware in Chapter 3 3 Evaluate results q If either of the following LED patterns remain go to Display Troubleshooting l l l 0 0 l l 0 0 0 0 0 l 0 0 l front of instrument J q If any other LED patterns r...

Page 207: ...it appears that there is a problem with the display refer to the troubleshooting information that follows n If the new display appears dim or doesn t light see Backlight Intensity Check n next Backli...

Page 208: ...ime Zero the photometer according to the manufacturer s instructions 4 Center the photometer on the analyzer display as shown in Figure 6 7 PHOTOMETEF PHOTOMETEF Pi t E Note Figure 6 7 Backlight Inten...

Page 209: ...part Dark Pixels Specifications Dark stuck on pixels may appear against a white background To test for these dots press EJ Z lXKE EH U TE TS Lxl lZ WJE TEBT CQmxm In a properly working display the fol...

Page 210: ...3 Rings Acceptable V 4 Rings Unacceptable Figure 6 8 Newtons Rings sb6123d Digital Control Troubleshooting 6 17...

Page 211: ...nplug the wire harness W14 from the back of the GSP interface Check pins 2 and 3 for 5 16 fO l V See Figure 6 9 q If the voltages are incorrect refer to Chapter 5 Power Supply Troubleshooting n q If t...

Page 212: ...check Inspect Ribbon Cable Repeat Display I t 55 Inspect the W20 A7 A19 ribbon cable for a loose connection Repeat Run Display Test 55 If the analyzer fails the test a walking one pattern wiIl be cont...

Page 213: ...Figure 6 10 Pin Locations on A19 sg6Ols Figure 6 11 A7 CPU Wking One Pattern 6 20 Digital ControlTroubleshooting...

Page 214: ...Ii Y FIll23 T F JTURY and perform display tests 59 through 76 substitute the next test number where Iss was used Watch for the analyzer display and front panel LEDs to flash q If the analyzer fails a...

Page 215: ...q If at the end of the turn on sequence the channel 1 LED is not on and all HP IB status LEDs are not off continue with Identify the Stuck Key n q If you suspect that one or more LEDs have burned out...

Page 216: ...l s l Y 0 3 i J DISPLAYI E E COPY GTE 4wmey i 7 6 Front Wnel Block Response Entry E Y Response Response Entry Entry Softkey Softkey atry atry Active Channel Active Channel Entry Entry Softkey stlmllln...

Page 217: ...L Instrument State 39 d 7 Softkey 40 47 Not used 48 8 Entry 49 JQW 50 6 Entry 51 l 0 Response 52 Response 5 3 l L o J Entry 54 l 0 EntrJr 66 saftjypsy 4 Softkey Inspect Cables Remove the front panel a...

Page 218: ...er incorporates 20 internal diagnostic tests Most tests can be run as part of one or both major test sequences all internal test 0 and preset test 1 1 Press STEiiTJ ii XWJ 4 J E TJ lS iXEm TEST to per...

Page 219: ...Replace A7 A7 A10 Remove AlO rerun test If fail replace A7 If pass replace All A7 AlO Most likely A7 assembly AlO A7 A12 Check analog bus node 17 for 1 MHz If correct Al2 is verilled suspect AlO AlO A...

Page 220: ...ing Here and you suspect there is an HP IB problem in the analyzer perform the following test It checks the internal communication path between the A7 CPU and the Al6 rear panel It does not check the...

Page 221: ...bleshooting Here This chapter is divided into two troubleshooting procedures for the following problems w Incorrect power levels Perform the Broadband Power Problems troubleshooting checks n Phase loc...

Page 222: ...Source Troubleshooting Flowchart 7 2 Source Troubleshooting...

Page 223: ...d Correction Constants n 5 Perform the necessary performance tests Refer to Chapter 2 System Verification and Performance Tests Before You Start Troubleshooting 1 2 Make sure all of the assemblies are...

Page 224: ...tion section of the Start Troubleshooting Here chapter in this manual w If incorrect power levels were observed in Step 4 Faulty Group Isolation section of the Start Troubleshooting Here chapter in th...

Page 225: ...0 050 000 000 GHz STOP40 050 OC0 Ooo GHz sb6153d Figure 7 2 J3P 8722D 0 25V GHz Waveform at Abus Node 9 n If the waveform appears normal in one but not all frequency bands go to Band Related Problems...

Page 226: ...rection constants 1 Perform the source pretune correction constant procedure service test 43 see Chapter 3 Adjustments and Correction Constants to fix this potential problem 2 Then press PRESET PRESET...

Page 227: ...plies If they are bad replace A51 Note For the HP 8722D if 2 4 mm flexible cables and 2 4 mm power sensors are not available troubleshooting is possible using 3 5 mm equipment and 3 5 mm to 2 4 mm ada...

Page 228: ...C num high band values from about 3200 to 4095 n If the power at S2J3 is greater than 0 dBm replace the A58 M A D S n If the power is less than 0 dBm check YIG 1 output power at the A53 end of W6 7 Po...

Page 229: ...5 Low power in high or mid band indicates a problem with the associated YIG or switches Trace back along the signal path to find where the power is lost Activate the signal path under test by selectin...

Page 230: ...Press I m CM J EQ and set the instrument to the frequencies of column one in Ibble 7 l lhble 7 1 VCO Range Check Frequencies Front Panel Displayed Counter Value 50 MHz 119 988to120 012MHz lOQ QQQMHz...

Page 231: ...to tune the signal across the entire frequency range You should see a signal that is about 0 dBm at 120 MHz and below You should see the signal drop approximately 2 5 dB above 120 MHz 6 Look for side...

Page 232: ...I TUNEON Vary the fractional N VCO frequency with the front panel knob If the waveforms do not resemble Figure 7 4 at the frequencies indicated replace A14 The amplitude of the waveforms wiII vary fr...

Page 233: ...nd observe the frequency as shown in lhble 7 2 lhble 7 2 VCO Exercise Matrix supply T It Point A8TP7 A8TP8 A8TP2 Voltage A14 Test Mnemonic Point 15v A14TP14 5vu A14TP14 AGND A14TP14 Counter Frequency...

Page 234: ...generates a TTL cycle start CST signal every 10 microseconds when the VCO is oscillating 3 Connect an oscilloscope to A14TP3 CR Suggested vertical scale B OV div 4 Press iEKE TIEGGEB HEI 8XI to stop t...

Page 235: ...API4 API6 NLATCH A13 Location Al4 bC8tiOn none TP3 P2 2 P2 2 P2 6 P2 6 P2 32 P2 32 P2 3 P2 3 P2 34 P2 34 P2 4 P2 4 P2 36 P2 36 Pl 28 Pl 63 n l l C l FII LCTCH Figure 7 5 Al4 JX L Signals at AlQTP3 n...

Page 236: ...ote The frequency counter may have to be removed from port 1 to provide enough of a reflection to see on the scope 2 Now the oscilloscope should display the IF signal as a sine wave of about 10 MHz Th...

Page 237: ...network analyzer front panel knob until the spectrum analyzer measures an output frequency of 10 MHz If the 10 MHz signal appeared disregard the rest of this step and continue with the next step If t...

Page 238: ...n the spectrum analyzer center frequency 4 69 GHz span 200 MHz You should see a signal at approximately 4 69 GHz n If the signals appeared for both the low band and high band you can assume that all t...

Page 239: ...ated problem Start by measuring power from S2 Sl HP 8722D Only If the power here is good then ail of the components are verified Continue troubleshooting with Broadband Power Problems to check other c...

Page 240: ...end of cable W6 n If power is greater than 8 dBm S3 is good n If power is not good replace S3 4 Measure power on the S2 end of W36 n If the power is greater than 5 dBm replace S2 n If the power is le...

Page 241: ...place the A58 M A D S High Band Problems HP 8719D 2OD Only 1 Press j j ii iVJ cE l4liW K MtJU X lEW D lV Z D SRC tune in the high band is capable of tuning the instrument from about 2 4 to 5 GHz Loss...

Page 242: ...k diagram the following components may be at fault n Sl n A58 M A D S n A54 YIG 2 3 Since the analyzer phase locked in low and or mid band all of the phase lock circuitry is working so look for low po...

Page 243: ...by pressing m and j j or B ff i i s i i i 3 lb Disable the ALC eliminate modulator control press C J vg J s q Q J I irnJrrsT i j g Qv to Use a z j ii ii i power meter to measure the power at the fault...

Page 244: ...Attenuator Check next n If you measure at least 8 dBm 3 dBm Option 007 at the other port either the directional coupler or the bias tee or the transfer switch S4 is faulty The power loss through each...

Page 245: ...er assembly of the instrument is faulty The two receiver assemblies that affect aII three signal paths are the A10 digital IF and Al2 reference assemblies The receiver assemblies that are associated w...

Page 246: ...tests Refer to Chapter 2 System Verification and Performance Tests n All Signal Paths Look Abnormal For the receiver to operate properly the A10 digital IF and 2nd converter assemblies must receive si...

Page 247: ...roach If two signal paths are abnormal repeat the steps of this section for each suspect signal path 1 2 3 4 Ib see the traces of signal path A or R connect a short to port 1 Press 1presetl m I PtJgT...

Page 248: ...l go to A and B Sampler Check by Substitution m If the A or B signal path appears slightly low the problem is possibly a faulty directional coupler or more probably a lossy sampler lb isolate the faul...

Page 249: ...I 1 I I I I I I I I I log MAG IAG lOdBm lOdBm REFOdBm REFOdBm I I I I I I I I I I I I I I I I I I Typical R Signal Path Typical R2 Signal Path Opt 400 Only Typical A Signal Path Typical B Signal Path...

Page 250: ...T 2 4 mm of the suspect sampler Note To disconnect the rigid cable of the A69 step attenuator it may be necessary to disconnect addition rigid cables and loosen the transfer switch 5 Press LMeas XW T...

Page 251: ...by referring to Sampler Voltage Check n A and B Sampler Check by Substitution 1 For the HP 87I9D zOD set the output power to 10 dDm by pressing Menu I p Jqfg F E jg RQ gj f E 4 L J J g J 1 2 For the...

Page 252: ...or its control and bias voltages are faulty Continue with U Sampler Voltage Check n Sampler Voltage Check Note The BIAS CONTROL line is not used 1 Measure the SAMPLER CONTROL voltage green wire at the...

Page 253: ...converter n If the trace appears abnormal replace AlO Ebulty A or B Signal Path 1 If A is the bad signal path remove A6 the working R signal path 2nd converter and install A4 the suspect A signal pat...

Page 254: ...ect measurement data w Faihues which impede the normal functioning of the analyzer or prohibit the use of a feature This chapter addresses the first category of failures which are usually caused by th...

Page 255: ...vice manual for information on gauging and inspecting the device connectors If any calibration device is obviously damaged or out of mechanical tolerance replace the device Inspect the Error Terms Err...

Page 256: ...the directivity error term looks good the load and the test port are good If directivity looks bad connect the same load on the other test port and measure its directivity If the second port looks bad...

Page 257: ...then regenerate the error terms 2 If the problem moves from one port to another you have found the offending assembly Note Before trying this be sure to inspect the front panel test port connector for...

Page 258: ...t format 2 Connect the good short to port 1 Press ZIG I LEXEg DELAY and turn the front panel knob to enter enough electrical delay so that the trace appears as a dot at the left side of the circle See...

Page 259: ...sb6143d Figure 9 2 Typical Smith Chart Traces of Good Short a and Open b 9 6 Accesseries Troubleshooting...

Page 260: ...tics 2 Service Features When applicable the HP IB mnemonic is written in parentheses following the key See HP 1B Service Mnemonic Dell ions at the end of this section Note Throughout this service guid...

Page 261: ...apter to help you w Understand the message w Solve the problem Service Key Menus Internal Diagnostics The internal diagnostics menus are shown in Figure 10 l and described in the following paragraphs...

Page 262: ...I II TE T OPT I311 jFF5ET TAeLE L ER IICE Ml c I _ DELETE AUG LEkF LI T Figure 10 l Internal Diagnostics Menus Service Kay Menus and Error Messages 1O 3...

Page 263: ...s are divided by function into the following categories 0 Internal Tests O 20 q External Tests 21 25 q System Verification Tests 26 42 0 Adjustment Tests 43 54 q Display Tests 55 61 q Test Patterns 62...

Page 264: ...OT AVALUKE 3 ND NOT WNE 4 DONE DONE 6 runs the selected test and may display these softkeys a TESRl continues the s y d test A I TESRB alters correction constants during adjustment tests EX TESR4 disp...

Page 265: ...en a waIking one pattern to the GSP and reads them back If the test fails the CPU repeats the walking 1 pattern until m is pressed DRAM cell Tests the DRAM on A19 by writing a test pattern to the DRAM...

Page 266: ...fails toggles the record function on and off When the function is ON certain test results are sent to a printer via HP IB This is especially useful for correction constants The instrument must be in...

Page 267: ...ults when activated during a system verification Edit List Menu To access this menu press G ZRKHX HR U k l SZ TX R R IJS 55 and then press one of the following _ Q JF fJ j or gI F ex JK f or J Jj i sm...

Page 268: ...except as noted 0 ALL INT Runs only when selected It consists of internal tests 3 l 1 13 16 and 20 Use the front panel knob to scroll through the tests and see which failed If all pass the test displ...

Page 269: ...position Note The following descriptions of tests 3 and 4 apply to instruments with ilrmware revisions 6 xx and below 3 CMOS RAM Verifies the A7 CPU CMOS long term memory with a non destructive write...

Page 270: ...10 Z Jumper Positions on the A7 CPU For additional information see Internal Tests near the front of this chapter and the YDigital Control Troubleshooting chapter Service Key Menus and Error Messages...

Page 271: ...A7 CPU Assembly Normal Mode Destructive SFIAM Test Enabled Rocker Slide Figure 10 3 Switch Positions on the A7 CPU 4 Malu DRAM Verifies the A7 CPU main memory DRAM with a non destructive write read t...

Page 272: ...rence DSP Control Tests the ability of the A7 CPU digital signal processor to write to the control latches on the A10 digital IF Feedback is verified by the main processor It primarily tests the A10 d...

Page 273: ...ach data point represents the relative width of a particular ADC code Ideally ah codes have the same width different widths correspond to non Iinearities 18 19 ADC Ofs This runs only when selected It...

Page 274: ...rt to PORT 1 22 23 Op Ck Port 2 Same as 21 but tests PORT 2 Fr P n Seq Tests the front panel knob entry and all Al front panel keys as well as the front panel microprocessor on the A2 assembly It prom...

Page 275: ...a measurement calibration It must be done before service internal tests 27 28 29 or 30 are performed Ver Dev 1 Recalls verification limits from disk for verification device l in all applicable S para...

Page 276: ...m to exit this routine IF Step Cot Measures the gain of the IF amplifiers A and B only located on the A10 digital IF to determine the correction constants for absolute amplitude accuracy It provides...

Page 277: ...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...

Page 278: ...he 4 VRAM banks V W video Verifies that the GSP is able to successfully perform both write and read shift register transfers It also checks the video signals LHSYNC LVSYNC and LDLANK to verify that th...

Page 279: ...The staircase pattern it produces will quickly show missing or stuck data bits 6 8 l t Pat 7 Displays the following seven colors Red Yellow Green Cyan Blue Magenta and White 69 l t Pat 8 This pattern...

Page 280: ...es together This is used to test the quality of the external monitor 73 I t Pat 12 Displays a repeating gray scale for troubleshooting using an oscilloscope It is similar to the 16 step gray scale but...

Page 281: ...Features The service feature menus are shown in 10 3 and described in the following paragraphs The following keys access the service feature menus r Figure 10 4 Service Feature Menus 10 22 Service Key...

Page 282: ...th an oscilloscope a frequency counter or a spectrum 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...

Page 283: ...er DAC numbers in the range of 2900 through 4095 to generate test port output frequencies from 2 3 GHz to 4 9 GHz T Wf IUkE iSA D SMXH HP 8722D allows you to enter DAC numbers in the range of 2020 thr...

Page 284: ...og bus counter is used only with PLL DIAG mode XlrlT indicates that it will continuously cycle through ail steps of the phase lock sequence P SE holds it at any step of interest This mode is useful fo...

Page 285: ...due to a CPU board failure Without a disk backup the correction constants can be regenerated manually although the procedures are more time consuming enables and disables the analog bus described belo...

Page 286: ...one of three sources n selected analog bus node n Al4 fractional N VCO FRAC N n Al4 fractional N VCO divided down to 100 kHz DIV FRAC N frequency range is 100 kHz to 16 MHz The counts are triggered by...

Page 287: ...cilloscope voltmeter etc To do this connect the equipment to the AUX INPUT BNC connector on the rear panel and press AUDI WE until D is highlighted Caution To prevent damage to the analyzer first conn...

Page 288: ...tor the Al4 fractional N VCO frequency at the node shown on the Overall Block Diagram n in the Start Troubleshooting chapter switches the counter to monitor the Al4 fractional N VCO frequency after it...

Page 289: ...rrection Constants adjustment as a reference for calibrating the analog bus low resolution circuitry 3 Aux Input Rear panel input This selects the rear panel AUX INPUT to drive the analog bus for maki...

Page 290: ...y This error voltage corresponds to the difference in frequency between the divided IF and the 1 MHz reference frequency from the Al2 assembly P Figure 10 5 Node 8 Swp Err Phase Error Voltage 9 0 25V...

Page 291: ...0 25V GEIz Source Tuning Voltage 10 All Gnd Ground reference 11 IF IF used for phase lock Counter ON analog bus Reading 10 MHz This node displays the IF frequency see Figure 10 S as it enters the All...

Page 292: ...ck after 40 MHz Eiter This node detects the IF as a voltage at the output of the 40 MHz fIIter on the All phase lock assembly The trace should be a flat line at about 1 7 V as shown in Figure 10 7 STA...

Page 293: ...ly VCO tune adjustment 16 2nd LO 2nd converter reference Counter ON analog bus Reading 9 996 MHz This node counts the 2nd LO used by the 2nd converter assemblies to produce the 2nd IF of 4 kHz 17 PL R...

Page 294: ...hown in Figure 10 S when in Log F req sweep mode Any other waveform indicates that the F N VCO is not phase locked The vertical lines in the trace indicate the band crossings The counter can also be e...

Page 295: ...address and shows it in the active entry area of the display Use the front panel knob entry keys or step keys to enter the memory address of interest PIT X PEEK PQXI POKEID llibaiz l4lx mtY Displays...

Page 296: ...ion date appear in the active entry area of the display as shown in 10 9 below The analyzer s serial number and installed options are also displayed Another way to display the Grmware revision informa...

Page 297: ...he HP 87190 20022D Network Anul2 zer Programw s 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 rou...

Page 298: ...Ekm Outputs the counter s frequency data Reads any prompt message sent to the error queue by a service routine Outputs the integer status of the test most recently executed Status codes are those list...

Page 299: ...omputed until you have measured all the necessary standards ADDRESSED TO TALK WITH NOTHING TO SAY Error Number You have sent a read command to the analyzer such as ENTER 31 716 without first requestin...

Page 300: ...these states to a disk and refer to the Assembly Replacement and Post Repair Procedures chapter for battery replacement instructions See the U Preset State and Memory Allocation n chapter in the HP 8...

Page 301: ...rarchical file system or llles nested within subdirectories The analyzer does not support 1 Replace the disk medium with a LIF or DOS formatted disk that does not contain files nested within subdirect...

Page 302: ...trument state do not 66 match the parameters for the calibration set therefore correction has been turned off The critical instrument state parameters are sweep type start frequency frequency span and...

Page 303: ...l 39 disk drive refer to the disk drive operating manual DISK MESSAGE LENGTH ERROR Error Number The analyzer and the external disk drive aren t communicating 190 properly Check the HP IB connection an...

Page 304: ...e operating manual EXTSRC NOTON CONNECTEDORWRONGADDR Error Number The analyzer is unable to communicate with the external source 162 Check the connections and the HP IB address on the source FILE NOT...

Page 305: ...nts NO CALIBRATION CURRENTLY IN PROGRESS Error Number The I SW ML SEQ CE softkey is not valid unless a 69 calibration is already in progress Start a new calibration NO FAIL FOUND Service Error The sel...

Page 306: ...lrst IF signal was detected at pretune but phase lock could 7 not be acquired Refer to the Source Troubleshooting chapter NO SPACE FOR NEW CAL CLEAR REGISTERS Error Number You cannot store a calibrati...

Page 307: ...o indicate that the power trip function has been activated When this occurs reset the power to a lower level then toggle the f XlRCE PWR on QFF softkey to switch on the power again OVERLOAD ON INPUT B...

Page 308: ...CE FUR on f4VF softkey to switch on the power again PARALLEL PORT NOT AVAILABLE FOR GPIO Error Number You have defined the parallel port as COPY for sequencing in 165 the HP IB menu To access the para...

Page 309: ...ou connect a mixer between the RF output and R input before turning on frequency offset mode Ignore it it will go away when you turn on frequency offset This message may also appear if you turn on fre...

Page 310: ...ce Troubleshooting chapter POWER METER INVALID Error Number The power meter indicates an out of range condition Check the 116 test setup POWER METER NOT SETTLED Error Number Sequential power meter rea...

Page 311: ...age condition Refer to the Power Supply Troubleshooting chapter PRINTER error Error Number The parallel port printer is malfunctioning The analyzer cannot 175 complete the copy function PRINTER not ha...

Page 312: ...d the self diagnose feature descriptions earlier in this chapter SOURCEPOWERTURNED OFF RESETUNDERPOUERMENU Information You have exceeded the maximum power level at one of the Message inputs and power...

Page 313: ...on 012 Only When this occurs reduce the power to a lower level TROUBLE CHECKSET UP AND START OVER Service Error Your equipment setup for the adjustment procedure in progress Number 115 is not correct...

Page 314: ...ils on the theory of error correction refer to the Application and Operation Concepts chapter of the HP 8719D ZOD ZZD Network Aruzlgwr User s Guide Error Ikrms Can Also Serve a Diagnostic Purpose Spec...

Page 315: ...while troubleshooting q All parts of the system including cables and calibration devices can contribute to systematic errors and impact the error terms q Connectors must be clean gaged and within spec...

Page 316: ...rement select from the following two options q If you will be measuring devices with a dynamic range less than 90 dB press q If you will be measuring devices with a dynamic range greater than 90 dB fo...

Page 317: ...pod Test Number 1 E rb Ex ED ED EDF 31 2 J R ES F 32 3 et ERF 33 4 EXF 34 6 ELF 35 6 ETF 36 7 EDR 37 8 ESR 38 0 ERR 30 10 EXR 40 11 ELR 41 12 FL 42 NOTE Meaning of first subscript D dhwtivity S source...

Page 318: ...available from previous measurements refer to the typical uncorrected performance specifications listed in Ihble 11 2 and Iable 11 3 Make a hardcopy of the measurement results a Connect a printing or...

Page 319: ...dB 21dB 16 dB Source Match Standard 12 dB 12 dB 10 CiB 8dB Source Match Option 400 2odB 2odEs 12 dB 10 dB Source Match Option 007 16 dB 2odB 14 dB 11 dB Source Match Option 086 18 dB 18 dB 14 dB 8dB L...

Page 320: ...Measured with RF cables T D 06 to 2 GIfi 23 dB 17 dEi 20 dB 18 dB 21 dB f3dB f3dB 95 dB b 2 I Fkeqne ItOSGUJ 21 dB 12 dB 16 dB 16 dB 17 dB f3dB f3dB 95 dB 7 Range Ito2OGE 16 dB 11 dB 11 dB 12 dB 13 dB...

Page 321: ...ve It may be helpful to define some of the terms used in the error term descriptions that follow w B signal path refers to the reference signal path It includes the A58 M A D S A64 R sampler and assoc...

Page 322: ...surement is assumed to be due to directivity error Significant System Components The load used in the calibration is the most important component The test port connector the cable and the coupler also...

Page 323: ...urce to the output port Significant System Components The open and short calibration devices are important as are the coupler and test port connectors The power splitter bias tees step attenuator and...

Page 324: ...ly 3 dB at 500 MHz 15 at 100 MHz and 20 at 50 M H Z SigniIkant System Components The open and short calibration devices have an effect on reflection tracking But large variations in this error term ma...

Page 325: ...n Using averaging will also reduce the peak to peak noise in this error term Significant System Components Loose cable connections or leakage between components in the lower box are the most likely ca...

Page 326: ...gnificant System Components Large variations in the forward or reverse load match error terms may indicate a bad U thru n cable or a poor connection of the cable to the test port Affected Measurements...

Page 327: ...ror term Typically transmission tracking appears as a slope of O 5 dB from 0 84 GHz to 40 GHz and a roll off below 0 84 GHz which is typically 3 dB at 500 MHz 15 at 100 MHz and 20 at 50 MHz Significan...

Page 328: ...Simplified block diagrams illustrate the operation of each functional group An overall block diagram is provided at the end of the section System Operation The HP 8719D 20D 22D microwave network anal...

Page 329: ...ignal separation devices separate the source signal into a reference path and a test path They provide attenuation for the source signal RF path switching to allow forward and reverse measurements and...

Page 330: ...instrument Digital Control The digital control group which includes the front and rear panels and the display as well as the CPU provides control to all assemblies in the network analyzer The graphic...

Page 331: ...mplified block diagram of the power supply group Figure 12 2 Power Supply Functional Group Simplified Block Diagram Al6 Preregulator The Al5 preregulator steps down and rectifies the line voltage It p...

Page 332: ...V 25V 18V 18V 8V 8V Regulated 5 V Digital Supply The 5 VD supply is regulated by the control circuitry in the Al5 preregulator It goes directly to the motherboard and from there to all assemblies requ...

Page 333: ...The shutdown 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 m...

Page 334: ...ting when other supplies do not work Note If blanking pulses from the A19 GSP are not present then 3 3 V will not be sent to the display Digital Control Theory The digital control functional group con...

Page 335: ...connect port interfaces The main CPU is the master controller for the analyzer including the other dedicated microprocessors The memory includes EEPROM RAM EPROM and ROM Data from the receiver is seri...

Page 336: ...he 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 t...

Page 337: ...signals from the A19 GSP w digital TI L horizontal sync n diital TTL vertical sync n blanking n data clock w digital TI L red video n digital ITL green video w digital lTL blue video A19 GSP The A19 g...

Page 338: ...y reference feature when a signal is connected to this input When the signal is removed the analyzer automatically switches back to its internal frequency reference 10 MHZ PRECISION REFERENCE Option l...

Page 339: ...er display that is capable of running a PC VGA monitor Source Group Theory The source functional group produces a stable output signal by phase locking a YIG oscillator to a synthesized VCO voltage co...

Page 340: ...T is generated by the VCO in the fractional N synthesizer 3 A comb of harmonics 1st LO is produced in the pulse generator 4 A synthesizer harmonic 1st LO and the source signal SOURCE OUT are mixed in...

Page 341: ...rt of the time and by N 1 part of the time The ratio of the divisions yields an average equal to the desired fractional frequency API analog phase interpolator current sources in the Al3 assembly corr...

Page 342: ...rator is converted to a tune current This brings the appropriate YIG oscillator closer to the desired frequency which in turn reduces the phase frequency detector output voltage When the voltage is re...

Page 343: ...a 40 MHz VCXO voltage controlled crystal oscillator One of the divided down signals is the 100 kHz FN REF for phase locking the synthesizer signal in A13 Another is the 1 MHz main phase locked loop r...

Page 344: ...in a stereo speaker the woofer reproduces low frequencies and the tweeter reproduces high frequencies Similarly in the YIG oscillator the main coil allows large slow changes in frequency but cannot re...

Page 345: ...HP 8722D uses the output of YIGB In the A58 M A D S microcircuit the YIG oscillator signal is modulated by the ALC OUT signal explained below to provide power control and leveling ALC Automatic Leveli...

Page 346: ...the test port The detector outputs a voltage that is proportional to the RF power out of the amplifier This voltage is used by the ALC circuit on the source Interface board The power source divides th...

Page 347: ...p to 5 dBm for HP 8719D 20D 10 dBm for HP 8722D The detector outputs a voltage that is proportional to the RF power out of the amplifier The voltage is used by the ALC circuit onthe source interface b...

Page 348: ...indicate the status of the transfer switch A60 and A61 DC Bias Tees The DC bias tees provide a means of biasing active devices with an external DC voltage connected to the rear panel DC BIAS CONNECT p...

Page 349: ...is derived Figure 12 7 Receiver Functional Group Simplbd Block Diagram Samplers and Second Converters Each input signal goes to one of three identical pairs of sampler and second converter assemblies...

Page 350: ...n the second converter The resulting difference frequency is a constant 4 kHz 2nd IF signal that retains the amplitude and phase characteristics of the measured signal The 2nd IF signals from all thre...

Page 351: ...ng An additional input to the A10 assembly is the analog bus ABUS a built in service tool for testing analog circuits within the instrument This is a single multiplexed line that networks analog nodes...

Page 352: ...0D 8722D network analyzer Replaceable parts include the following n major assemblies w cables n hardware In general parts of major assemblies are not listed Refer to Ihble 13 2 at the back of this cha...

Page 353: ...entifies the faulty assembly 2 Order a replacement assembly Refer to Chapter 13 Replaceable Parts 3 Replace the faulty assembly and determine what adjustments are necessary Refer to Chapter 14 Assembl...

Page 354: ...hange procedure Major Assemblies Top and Major Assemblies Bottom list all major assemblies including those that can be replaced on an exchange basis Ordering Information To order a part listed in the...

Page 355: ...r G I _ i 1 2 Figure 13 1 Module Exchange Procedure 1 3 4 ReplaceableParts...

Page 356: ...the part needed The parts lists are organized into the following categories w Major Assemblies Top n Major Assemblies Bottom n Cables Top w Cables Bottom n Cables Front n Cables Rear n Front Panel Ou...

Page 357: ...ASSY POST REGULATOR REBUIIX EXCHANGE 87lQD 872OD BD ASSY POST REGULATOR 8722D BD ASSY SOURCE CONTROL BD ASSY DIGITAL IF BD ASSY DIGITAL IF REBUIIZ EXCHANGE BD ASSY PHASE LOCK BD AMY REFERENCE BD ASSY...

Page 358: ...872OD REBUItT EXCHANGE 1 ASSY M AD2 8719Dl8720D 1 ASSY M A D S2 871QD 872OD REBUIIT EXCHANGE 1 ASSY SUPER M A D S 8722D 1 ASSY SUPER M A D S 8722D REBUIIX EXCHANGE 1 ASSY WA D B2 8722D 1 ASSY M A D S2...

Page 359: ...Major EP 8719D 20D Assemblies lbp Armu 05 134 Replaceable Parts...

Page 360: ...Major EIP 8722D Assemblies lbp I f I i d 1 I Replaceable Parts 134...

Page 361: ...NAL COUPLER 871OD 872OD REBIJIIZ EXCHANGE A62 63 5086 7518 2 ASSY DIRECTIONAL COUPLER 8722D A62 63 6086 6618 2 ASSY DIRECTIONAL COUPLER 8722D REBUII2 EXCHANGE A At A66 A67 5086 7614 1 As sY SAMPLER A6...

Page 362: ...Major Assemblies Bottom IL IT n I 0 l J Replaceable Parts 13 11...

Page 363: ...Major Assemblies Bottom T 13 l 2 Replaceable Parts...

Page 364: ...ToS3 W8 F 0 8 4 1 5 6 0 0 4 0 1 Al2 To Al3 w9 F 08416 00041 1 Al4 To Al3 WlO F 08416 60031 1 A66 To All Wll SR 08720 20065 1 A67ToA63 w31 F 08416 60036 1 A62 To Al4 W42 SR 08720 20061 1 A63TOS2 w43 SR...

Page 365: ...EP 8719D ZOD Cables Lbp i 15V I I 1 PAPT OF PEAP PAIIEL E TEPI ILL F EFEF EI ICE bo7 d 13 14 Replaceable Parts...

Page 366: ...HP 8722D Cables Ibp I vdK we w4 WZ W4q Wih w47 sbhllld Replaceable Parts 13 l 5...

Page 367: ...720 20011 08722 20074 08722 20078 08720 2000Q 08722 20072 08722 20076 08720 20033 OS720 20021 0872 20146 08722 2006Q 08722 20086 08720 20073 08722 20064 Qtu 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Page 368: ...2016Q 08722 20097 0872G20143 08720 20158 0872G20167 0872G20142 0872 20146 08722 20061 0872 20136 08722 2006Q G 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Description A72TOA64 A74TOA70 871...

Page 369: ...Cables Bottom 13 18 Replaceable Parts...

Page 370: ...Cables Bottom Replaceable Parts 13 18...

Page 371: ...Cables Bottom 13 20 ReplaceableParts...

Page 372: ...Cables Bottom Replaceable Parts 13 21...

Page 373: ...20098 Qtr 1 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Description BD ASSY GSP BD ASSY DISPLAY INTERFACE NOT SHOWN BD ASSY LED R CHANNEL BUFFER AMPLIFIER ATl ENUATOR 6 DB AlTFiNUA...

Page 374: ...8722D W68 SR 012 085 088 08720 20166 1 A71 To FRONT PANEL B IN 871OD 8720D W68 SR 012 085 089 08722 20099 1 A71 To FRONT PANEL B IN 8722D W60 SR 012 085 089 08720 20166 1 A70 IU FRONT PANEL A IN 871O...

Page 375: ...Cables Front 13 24 Replaceable Parts...

Page 376: ...Cables Front sbtlll d Replaceable Parts 13 25...

Page 377: ...6382 1 SW 8120 6379 1 ZW Wire Bundle n is the number of wires in the bundle RRAR PANEL SOURCE OUT To IN W68 TO WbO 871OD 20D REAR PANEL SOURCE OUT To IN W68 TO W6Q 8722D A60 To REAR PANEL SOURCE OUT 8...

Page 378: ...Front Panel Assembly Outside Ref option HP Part Qty Description Dee Number 1 2060 0006 1 NUT HEX l 4 32 2 2190 0067 1 WASHER LK 266 ID 3 1510 0038 1 GROUND POST Replaceable Parts 13 27...

Page 379: ...006o 3068 8120 6432 08720 60074 Qm 1 1 1 1 1 1 1 1 1 1 2 1 1 0 4 3 1 1 1 1 1 1 1 1 1 1 1 Description DISPLAY HOLD DOWN DISPLAY LAMP ASSY COLOR LCD A18 DISPLAY GLASS WASHER LK 266 ID NUT HEX l 4 32 FR...

Page 380: ...Front Panel Assembly Inside 3 PLACE Replaceable Parts 13 28...

Page 381: ...0400 0271 2110 0047 1400 0112 QQ 1 2 1 1 1 4 2 2 4 4 10 1 1 1 1 1 1 8 8 2 2 Description W86 A17 TO Al6 ASSY FUSE BD AMY REAR PANEL INTERFACE A16 ABY EXTERNAL REFEREN CE CABLE ASSY FAN FASTENER CONN RP...

Page 382: ...Rear Panel Assembly stolu2d Replaceable Parts 13 31...

Page 383: ...21 0068 0690 1310 0616 0430 08763 00078 08763 60168 8120 6458 Description ADAPTER UMX SCREW MACHINE M3 0 10 CW PN TX WASHER FLAT 606ID NY WASHER LOCK 606ID NUT SPECIAElY M 28 SCREW MACHINE M3 0 6 CW P...

Page 384: ...Rear Panel Assembly Option lD5 Replaceable Parts 13 33...

Page 385: ...IUZER CAP 5 08720 40001 1 PcBoARDsTABILlzER 6 0616 2086 16 SCREW SMM 4 0 7 PCFIXX 7 061 0463 4 SCREW SMM 3 6 10 CWPNTX 6 0515 0431 2 SCREW SMM 3 6 6 CWPNTX 0 06X 0430 3 SCREW SMM 3 0 6 CWPNTX 10 08720...

Page 386: ...Hardware Ibp 3 PLkCEIr i_ FL IIE 4 PLAlIE 2 I _ 2 z 1 I J ReplaceableParts 1 3 3 5...

Page 387: ...0636 0031 08720 00113 Qtu 1 4 2 6 4 4 4 4 4 1 2 4 2 2 3 2 2 1 1 1 Description SCREWSMM3 06CWPNTX SCREWSMM3 68CWPNTX SCREWSMM3 06PCFIXX SCREWSMM4 07PCFKI X SCREWSMM3 68PCFIXX SCREWSMM4 08CWPNl X WASHER...

Page 388: ...Replaceable Parts 13 37...

Page 389: ...ITCH ARM 3 08720 40014 1 AC LINE BUTI0N 4 0515 0430 2 SCREW SMM 3 0 6 CWPN IX 6 0515 2086 6 SCREW SMM 4 0 7 PCFU X 6 0616 1400 1 SCREW SMM 3 5 8 PCFXI X 7 0872 OOOQ3 1 CABLE MOUNTlNG BRACKET 6 5022 10...

Page 390: ...Part Qty Nomber Description 2110 0780 1 FUSE 3A 250 V NON TIME DELAY 08753 00065 1 BRACKET PREREGULATOR 0616 1400 2 SCREW MACHINE M3 6 8 CW F LTX 08763 60008 1 PREREGULATOR ASSY 08763 69098 1 PREREGUL...

Page 391: ...9188 4 REARsTANDoFT 4 0615 1402 4 SCREW SMM 3 6 8 PCPNTX 5 6041 9187 2 REAR CAP SIDE STRAP 6 0616 1384 4 SCREW SMM 5 0 10 PCFLl X 7 08720 00081 2 SIDE STRAP 8 08720 00080 2 COVER SIDE 0 6041 9186 2 F...

Page 392: ...AME 0515 0375 1 SCREWSMM 3 0 16 CWPNTX 08720 00076 1 MEMORY DECK 0515 0458 4 SCREWSMM 3 5 8 CWPNTX 6021 6808 1 REAR FRAME 0515 2086 16 SCREW SMM 4 0 7 PCFXl X 08720 20131 4 SIDESTRU lB 08720 60116 1 A...

Page 393: ...25 V FUSE 2A 125 V FUSE 4A 125 V FUSE 3 16A 250 V 08722 00018 CABLE ASSEMBLY EXTENDER RF CABLE AssEMBIx SMA FLEX WRENCH OPEN ENDED 5 5 BAG ANTISTATIC 12 0 x 16 OD Documentation F 8719D 8720D 8722D SER...

Page 394: ...249 PEMALE 3 5 MM TEST PORTS 1401 0246 Fnses used on the A8 l4mt Regulator FUSE 2A 125 V NON TIME DELAY 0 26x 0 27 2110 0425 FUSE 0 76A 125 V NON TIME DELAY 0 26x0 27 2110 0424 FUSE 2A 125 V NON TIME...

Page 395: ...KEYB4xRD OVERLAY for et amld keyboikrd SYSTEM RACK KIT AISO ORDER THE FOLLOWING FILLER PANEL INCH RACK MOUNT FLANGE KlT for instruments with hand s RACK MOUNT F LANGE KlT includes in rum handla RACK M...

Page 396: ...FP frontpanel FRAGN fractional N FRRQ frequency 3Hz gigahertz SEX hexagonal HP HewlettwCloud HP IB HewletWackard interface bus sx hex recess screws ID inside diameter IF intermediate frequency r o inp...

Page 397: ...cedures for removing and replacing the major assemblies of the HP 8719D 8720D 8722D network analyzer A table showing the corresponding post repair procedures for each replaced assembly is located at t...

Page 398: ...ry performance tests Refer to Chapter 2 System Verification and Performance Tests Warning These servicing instructions are for use by qualified personnel only To avoid electrical shock do not perform...

Page 399: ...ssemblies n Display Lamp and Assembly n Rear Panel Assembly n Rear Panel Interface Board Assembly n Source Assemblies n A7 CPU Board Assembly n A7BTl Battery n Al5 Preregulator Assembly n A19 Graphics...

Page 400: ...same type and rating 3 A 250 V F The use of other fuses or materials is prohibited 1 Disconnect the power cord 2 Use a small slot screwdriver to pry open the fuse holder 3 Replace the blown fuse with...

Page 401: ...Line Fuse Assembly Replacement and Post Repair Procedures 14 5...

Page 402: ...overs 1 Remove the top cover 2 Remove the lower rear foot item 4 that corresponds to the side cover you want to remove by loosening the attaching screw item 5 3 Remove the handle assembly item 6 by lo...

Page 403: ...Covers Assembly Replacement and Post Repair Procedures 14 7...

Page 404: ...e the trim strips item 3 from the top and bottom edges of the front frame by prying under the strip with a small slot screwdriver 5 Remove the six screws item 4 from the top and bottom edges of the fr...

Page 405: ...Front Panel Assembly Assembly Replacement and Pest Repair Procedures 14 g...

Page 406: ...Assembly in this chapter 2 Remove the ribbon cable item 1 from the front panel interface 3 Disconnect the RPG cable item 2 from the front panel interface 4 Disconnect the ribbon cable item 3 by slidi...

Page 407: ...Front Panel Interface and Keypad Assemblies Assembly Replacement and Pest Repair Procedures 14 l1...

Page 408: ...three screws item 1 that attach the display to the front panel 3 Remove the four screws item 2 disconnecting the accessories from the display 4 Disconnect the cable item 3 from the Al assembly 5 Disco...

Page 409: ...Display Lamp and Assembly Assembly Replacement and Post Repair Procedures 14 13...

Page 410: ...em 4 and the connectors attaching hardware item 5 5 Remove the hardware item 6 that attaches the RS 232 connector to the rear panel 6 Remove the four screws item 7 that attach the interface bracket to...

Page 411: ...t the ribbon cable item 12 from the motherboard connector pressing down and out on the connector locks Disconnect the wiring harness item 13 from the motherboard Replacement 1 Reverse the order of the...

Page 412: ...e that attaches the interface connector to the rear panel item 3 5 Remove the rear panel from the analyzer refer to Rear Panel Assembly in this chapter 6 If the analyzer has option lD5 disconnect the...

Page 413: ...Rear Panel Interface Board Assembly Assembly Replacement and Post Repair Procedures 14 17...

Page 414: ...cables item 2 and item 3 for all but Option 400 from the M A D S 5 Remove the four screws item 6 from each comer of the assembly Oscillator Removal 6 Remove the three screws item 1 that attach the so...

Page 415: ...the bracket 15 Lift the source module out of the analyzer 16 Remove three screws to detach the bottom source module cover 17 Remove four screws that attach the source control board to the source modu...

Page 416: ...circuit pins Check all the pin sockets from the back of the A9 board to ensure that all of the pins are inserted For HP 8722Ds you may need an eye glass to inspect the shallow pins of the Sl high band...

Page 417: ...Source Assemblies L 1 PLACES 3 4 PLACE51 Assembly Replacement and Post Repair Procedures 14 21...

Page 418: ...ew item 2 that secures the CPU board to the deck 5 Disconnect the ribbon cable item 3 sliding your Enger nail between the cable and the connector 6 Disconnect the ribbon cable item 4 from the CPU boar...

Page 419: ...A7 CPU Board Assembly _ ET3 J h CCl A I Ys _ I _ Assembly Replacement and Post Repair Procedures 14 23...

Page 420: ...ery A7BTl contains lithium The battery may explode if it is incorrectly replaced Do not incinerate or puncture this battery Either dispose of the discharged battery according to manufacturer s instruc...

Page 421: ...A7BTl Battery n i _ A EB n7ETI _ _ Assembly Replacement and Post Repair Procedures 14 25...

Page 422: ...3 Remove the preregulator A15 from the frame Replacement 1 Reverse the order of the removal procedure Note n When reinstalling the preregulator A15 make sure the three grommets on the wiring bundles a...

Page 423: ...A 15 Preregulator Assembly Assembly Replacement and Pest Repair Procedures 14 27...

Page 424: ...e power cord and remove the front panel refer to Front Panel Assembly in this chapter 2 Disconnect the two ribbon cables item 1 and item 2 3 Remove the two screws item 3 that attach the GSP to the fro...

Page 425: ...A19 Graphics Processor Assembly Assembly Replacement and Post Repair Procedures 14 28...

Page 426: ...panel refer to Front Panel Assembly in this chapter 3 Turn the instrument upside down and disconnect the ribbon cable item 1 from the disk drive 4 Remove the four screws item 2 that secure the disk dr...

Page 427: ...A3 Disk Drive Assembly Assembly Replacement and Post Repair Procedures 14 31...

Page 428: ...ibbon cable contact areas must face the contacts in the disk drive connector Also assure that the connector is properly locked 6 Replace the front panel with the exception of fastening the top left sc...

Page 429: ...by fastening the remaining screw top left to the front panel 11 Replace the covers refer to Covers in this chapter 12 Connect the line cord and turn the analyzer on Test the disk drive by saving and...

Page 430: ...e analyzer disconnect the four RF cables attached to the couplers two from the back of the couplers and two from between the couplers 4 Remove the six screws item 1 from the bottom edge of the front p...

Page 431: ...A62 A63 Test Port Couplers and LED Board Assemblies Assembly Replacement and Pest Repair Procedures 14 35...

Page 432: ...onnector item 1 on the rear panel 4 Remove the screw item 4 that attaches the lD5 assembly to the rear panel 5 Remove the screw item 2 that secures the high stability frequency reference board A26 to...

Page 433: ...A26 High Stability Frequency Reference Option lD5 Assembly 4 Assembly Replacement and Pest Repair Procedures 14 37...

Page 434: ...ar Panel Assembly in this chapter 2 Remove the four screws item 1 that secure the fan and fan cover to the rear panel Replacement 1 Reverse the order of the removal procedure Note The fan should be in...

Page 435: ...Bl Fan Assembly 4 PLXE 1 II Assembly Replacement and Post Repair Procedures 14 39...

Page 436: ...ont Panel rocessor None Internal lkst 0 Internal Test 12 Internal lkst 23 WA5lA6 Second bnverter None System Veriftcation A52Pulse Generator Output Power Adjustments System Verification 48 Post Regula...

Page 437: ...ication A7 Jumper Switch Positions Analog Bus CC Test 44 Source Pretune CC Test 43 Frequency Range and Accuracy or System Verification I A7 Jumper Switch Positions Reference Assembly VC0 Tune Frequenc...

Page 438: ...wer Level Test Frequency Range and Accuracy Power Level lbst Frequency Range and Accuracy A56 Lower Front Panel Assembly None A57 Fixed GscilIator output Power Adjustments Observation watch LEDs when...

Page 439: ...Power Level st A65 A Sampler Sampler Checkt System Verification A66 B Sampler Sampler Checkt System Verification A686dB Attenuator None Operation Checkt A69 Step AttenuatoT None Operation Checkt Sl Sw...

Page 440: ...material Certifwation Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibrat...

Page 441: ...to the nearest HP service center for repair including a description of any failed test and any error message Ship the analyzer using the original or comparable anti static packaging materials A listi...

Page 442: ...and 4 4 734 696622 INTEBCON FIELD OPEBATIONS Headquarters Hewlett Packard Company 3495 Deer Creek Bead Palo Alto California USA 94304 1316 416 867 6027 Anstralia Hewlett Packard Australia Ltd 31 41 Jo...

Page 443: ...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 conditions are fully understood and met Instru...

Page 444: ...e mains circuits from the mains supply after the EMC filters and before other parts of the instrument Caution This product is designed for use in Installation Category II and Pollution Degree 2 per IE...

Page 445: ...the product while protective covers are removed Energy available at many points may if contacted result in personal injury Warning The power cord is connected to internal capacitors that may remain l...

Page 446: ...German Regulation on Noise Declaration for Machines Laermangabe nach der Maschinenlaermrerordung 3 GSGV Deutschland 1 Acoustic Noise Emissiou Geraeuschemissionl LpA 70 dB Lpa 70 dB Operator Position...

Page 447: ...Also the random non repeatable and drift errors cannot be corrected because they cannot be quantified and measured during the measurement calibration and device measurement However the effects of rand...

Page 448: ...Etc Erc effective crosstalk n Efl Erl effective load match m Eft Ert effective transmission tracking n Crm Ctm cable stability deg GHz a Abl Ab2 dynamic accuracy w F frequency The sources for dynamic...

Page 449: ...oth reflection and transmission measurements The primary causes for instrumentation drift are the thermal expansion characteristics of the interconnecting cables within the test set and the conversion...

Page 450: ...he system measurement uncertainty plots and tables Reflection Uncertainty Equations lbtal Reflection lbfagnitude Uncertainy Erm An analysis of the error model in Figure A l yields an equation for the...

Page 451: ...r repeatability reflection The detailed equation for each of the previous terms is derived from the signal flow model located at the end of this appendix Reflection Phase Uncertainty Erp Reflection ph...

Page 452: ...d Stability 2 Systematic Efc Eft EfsSll EflS22 EfsEflSBlSlX Ab2 S21 Random d Ct 2 Rt 2 Nt 2 Ct S21d Ctm1 2 Ctm2 2 CrmlS11 2 Crm2S22 2 Rt S21d C tl Crt2 2 CrrlS11 2 Crr2S22 2 Nt d EfntS21 2 Efnf2 Drift...

Page 453: ...here Cpfl Cable phase frequency port 1 Cpf2 Cable phase frequency port 2 Dpsl drift phase degree source to port 1 Dpfsl drift phase degree frequency source to port 1 Dynamic Accuracy On the following...

Page 454: ...om the Specifications and Measurement Uncertainties chapter in the HP 8719D ZOD ZD Network Anulgm User s Guide to calculate the expected system performance The following pages explain how to determine...

Page 455: ...esidual crosstalk term can be ignored Connect an impedance matched load to each of the test ports and measure S21 or S12 Use the statistic function to measure the mean value of the trace Use this valu...

Page 456: ...ty Port 2 Cpf 1 Cable Phase Stability Port 1 Port 2 Dmsl z Magnitude Drift Dns Phase Drift Dp rI 2 P Drift with lkmp Frequency 65 dB 65 dB 65 dB 65 dB 60 dB 60 dB f0 03 dB f0 03 ClB fO OQO GHz o oo15...

Page 457: ...ector Reflection F peatability Port 1 C111 Connector Transmission Repeatability Port 1 Gt1 Magnitude Drift Due to kmperature Dms1 2 Phase Drift Due to lbmperature DPa2 Phase Drift Due to Jkmperature a...

Page 458: ......

Page 459: ......

Page 460: ......

Page 461: ...A l 6 Determining System Measurement Uncertainties...

Page 462: ...14 to Al3 Digital Control Siials Check 7 14 Al4 VCO Exercise 7 13 Al4 VCO Range Check with Oscilloscope 7 12 Al5 preregulator theory of operation 12 4 Al5 preregulator check 5 10 A15Wl plug detail 5 1...

Page 463: ...0 S addresses for HP IB systems 4 7 adjustment A7 Jumper Switch Positions 3 8 ADC offset correction constants test 48 3 14 analog bus correction constants test 44 3 12 fractional N spur avoidance and...

Page 464: ...ad cables 9 l Band Related Problems 7 19 BATTERY FAILED STATE MEMORY CLEARED lo 41 BATTERY LOW STORE SAVE REGS TO DISK lo 41 Blanking Adj lo 18 Blanking Adjustment 3 33 block diagram digital control g...

Page 465: ...e 4 12 preregulator LEDs 4 l 1 rear panel LEDs 4 11 source 4 16 Check Al2 Reference 7 9 Check Al4 Fractional N Checks With ABUS 7 10 check front panel cables 6 24 Check Open Loop Power 7 8 Check the A...

Page 466: ...l control A10 digital IF 12 8 Al6 rear panel 12 11 Al8 display 12 10 A19 GSP 12 10 Al front panel 12 8 A20 inverter 12 11 A2 front panel processor 12 8 A7 CPU 12 8 digital signal processor 12 10 EEPRO...

Page 467: ...K MESSAGE LENGTH ERROR 10 44 DISK not on not connected wrong addrs lo 44 DISK READ WRITE ERROR lo 45 INITIALIZATION FAILED lo 46 INSUFFICIENT MEMORY PWR MTR CAL OFF lo 46 NO CALIBRATION CURRENTLY IN P...

Page 468: ...iable fan circuit 12 6 fan speeds 5 20 fan troubleshooting 5 20 fan voltages 5 20 faulty analyzer repair 4 2 faulty cables 9 l faulty calibration devices or connectors 9 l faulty group isolation 4 10...

Page 469: ...ulty functional group 4 10 initialize EEPROMs 3 35 performance test the analyzer 2 l position the A7 Jumper Switch 3 8 repair the analyzer 4 l retrieve correction constant data from EEPROM backup disk...

Page 470: ...ity of Cables 2 l 1 main ADC lo 27 Main DRAM 10 10 lo 12 MAIN PWR DAC lo 24 Main VRAM 10 6 lo 19 major assemblies bottom view 13 10 part numbers 13 6 10 rebuilt exchange 13 3 top view 13 6 measurement...

Page 471: ...OT lo 52 POWER SUPPLY SHUT DOWN lo 52 POWER UNLEVELED lo 51 PRINTER error 19 52 PRINTER not handshaking 10 52 PRINTER not on not connected wrong addrs lo 52 PWR MTR NOT ON CONNECTED OR WRONG ADDR lo 5...

Page 472: ...gh Power System l 6 089 Frequency Offset Mode l 6 400 4 Channel Receiver l 7 descriptions of 13 41 options available l 6 OVERLOAD ON INPUT A POWER REDUCED lo 48 OVERLOAD ON INPUT B POWER REDUCED lo 48...

Page 473: ...quency reference assembly replacement 14 36 part numbers 13 32 Preliminary Checks 2 5 preregulated voltages theory of operation 12 5 preregulator theory of operation 12 4 preregulator LEDs check 4 11...

Page 474: ...ar 13 26 cables top 13 13 chassis inside 13 41 chassis outside 13 40 documentation 13 41 ESD supplies 13 43 front panel inside 13 28 front panel outside 13 27 fuse preregulator 13 39 fuses post regula...

Page 475: ...12 6 shutdown circuit on A8 12 6 shutdown circuitry disable 5 16 SiiaI Separation 12 19 softkeys 10 l Source Block 12 17 source check 4 16 Source Group Theory 12 12 source match ESF and ESR 11 10 SOU...

Page 476: ...9 4 test descriptions 10 9 test equipment for service l l TEST OPTIONS 10 7 test options menu 10 7 Test Pat l lo 19 Test Pat lo 10 21 Test Pat ll lo 21 Test Pat 12 10 21 Test Pat 13 lo 21 Test Pat 14...

Page 477: ...9 troubleshooting power supply 5 l Tuning the YIG Oscillator 12 15 U uncorrected performance 1 l 6 USE SENSOR A B 10 8 V variable fan circuit 12 6 VCO Tune Adjustment 3 43 Ver Dev l lo 16 Ver Dev 2 lo...