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1664A Theory

CPU

Located on the main circuit board, the microprocessor is a Motorola 68EC020 running at
25 MHz. The microprocessor controls all of the functions of the logic analyzer including
processing and storing data, displaying data, and configuring the acquisition ICs to obtain and
store data.

System Memory

The system memory is made up of both read-only memory (ROM) and random access memory
(RAM). A single 128Kx8 EPROM is used as a boot ROM (boot-up requires operating system
on disk loaded in the disk drive). Four 1Mx4 DRAMS are configured to provide a 1Mx16
DRAM space.

On power-up, instructions in the boot ROM command the instrument to execute its boot
routine, which loads the operating system from disk. The boot routine (on disk) includes
power-up operation verification of the instrument subsystems and entering the operating
system. The CPU searches for the operating system on disk.

The DRAM stores the instrument configuration, acquired data to be processed, and any
inverse assembler loaded in the instrument by the user.

CRT Controller and Display RAM

A Brooktree BT476KPJ66 RAMDAC color palette and a National Semiconductor LM1882CM
video frame generator control the CRT. One of the RGB outputs of the color palette provides
the eight-shade grey scale display. The video frame generator provides the horizontal and
vertical synchronization timing signals.

The display RAM is made up of two 256Kx4 DRAMS configured as 256Kx8 and stores all of
the pixel information used by the color palette. A serial address counter and an address
multiplexer control the DRAM addressing. At the conclusion of each video frame the vertical
sync signal from the video generator resets the serial address counter and a new frame is
generated.

Disk Drive Controller

The disk drive controller consists of a single floppy drive controller IC. The floppy drive
controller provides all signals to the disk drive including read and write data, read and write
signals, write gate, and step signal. The floppy drive controller also reads status signals from
the disk drive, including a track 00 signal, disk ready, and disk change signal.

Keypad and Knob Interface

The front panel keypad is scanned directly from the microprocessor address bus during the
video blanking cycle of the CRT. When a front panel key is pressed the associated address
bits are fed to the data bus through the pressed key and read by the microprocessor.

The rotary pulse generator (RPG) knob is part of the HIL circuitry. Pulses and direction of
rotation information are directed to an RPG interface IC and then to the HIL loop. The
microprocessor then reads and interprets the RPG signals and performs the desired tasks.

Theory of Operation

The 1664A Logic Analyzer

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Summary of Contents for 1664A

Page 1: ...4 97005 Second edition January 2000 For Safety information Warranties and Regulatory information see the pages at the end of the book Copyright Agilent Technologies 1987 2000 All Rights Reserved Agile...

Page 2: ...ytes in half channel mode Marker measurements 12 levels of trigger sequencing for state and 10 levels of sequential triggering for timing 100 MHz time and number of states tagging Full programmability...

Page 3: ...The Agilent Technologies 1664A Logic Analyzer iii...

Page 4: ...Chapter 3 gives instructions on how to test the performance of the logic analyzer Chapter 4 contains calibration instructions for the logic analyzer Chapter 5 contains self tests and flowcharts for tr...

Page 5: ...eshold accuracy 3 8 Set up the equipment 3 8 Set up the logic analyzer 3 9 Connect the logic analyzer 3 9 Test the TTL threshold 3 10 Test the ECL threshold 3 12 Test the User threshold 3 13 Test the...

Page 6: ...the data 1 58 Performance Test Record 3 59 4 Calibrating and Adjusting Logic analyzer calibration 4 2 Set up the equipment 4 2 To adjust the CRT monitor alignment 4 3 To adjust the CRT intensity 4 5...

Page 7: ...he fan 6 12 To remove and replace the line filter 6 12 To remove and replace the optional GPIB and RS 232C cables 6 13 To return assemblies 6 14 7 Replaceable Parts Replaceable Parts Ordering 7 2 Expl...

Page 8: ...Contents viii...

Page 9: ...1 Accessories 1 2 Specifications 1 3 Characteristics 1 3 Supplemental Characteristics 1 4 Recommended Test Equipment 1 8 General Information...

Page 10: ...Probe ground 5 per pack 5959 9334 2 User s Reference 01660 90904 1 Accessories Pouch 01660 84501 1 HIL Mouse A2838A 1 Accessories Available Other accessories available for the 1664A Logic Analyzer ar...

Page 11: ...4 0 0 0 ns adjustable in 500 ps increments Multiple Clocks Multiple Edges 0 0 4 5 ns through 4 5 0 0 ns adjustable in 500 ps increments Specified for an input signal VH 0 9 V VL 1 7 V slew rate 1 V ns...

Page 12: ...e Interval Accuracy sample period channel to channel skew 0 01 time reading Triggering Sequencer Speed 125 MHz maximum State Sequence Levels 12 Timing Sequence Levels 10 Maximum Occurrence Counter Val...

Page 13: ...ided in the Configuration and Format menus for identifying high low or changing states on the inputs Markers Two markers X and O are shown as vertical dashed lines on the display Trigger Displayed as...

Page 14: ...atterns must be specified for both markers and statistics are kept only when both patterns can be found in an acquisition Statistics are minimum X to O time maximum X to O time average X to O time and...

Page 15: ...Class A equipment SABS RAA Act No 24 1990 Immunity EN50082 1 Code1 Notes2 IEC 801 2 ESD 4kV CD 8kV AD 2 IEC 801 3 Rad 3V m 1 IEC 801 4 EFT 1kV 2 1 Performance Codes 1 PASS Normal operations no effect...

Page 16: ...48 inch 2GHz bandwidth Agilent 8120 1840 P T SMA Coax Cable Qty 3 18 GHz bandwidth Agilent 8120 4948 P Adapter Qty 4 SMA m BNC f Agilent 1250 1200 P T Adapter SMA f BNC m Agilent 1250 2015 P Coupler...

Page 17: ...gic analyzer 2 2 Ferrites 2 3 To apply power 2 4 To operate the user interface 2 4 To set the line voltage 2 4 To degauss the display 2 5 To clean the logic analyzer 2 5 To test the logic analyzer 2 5...

Page 18: ...re or ship the logic analyzer in environments within the following limits Temperature 40 C to 75 C Humidity Up to 90 at 65 C Altitude Up to 15 300 meters 50 000 feet Protect the logic analyzer from te...

Page 19: ...rrite will not affect the normal operation of the analyzer Ferrite Installation Instructions Use the following steps to install the ferrite on the logic analyzer cable 1 Place the ferrite halves and s...

Page 20: ...aceable Parts for option numbers of available power cables and plug configurations 3 Turn on the instrument power switch located on the front panel To operate the user interface To select a field on t...

Page 21: ...the CRT might become magnetized and display data might become distorted To correct this condition degauss the CRT with a conventional external television type degaussing coil To clean the logic analy...

Page 22: ...2 6...

Page 23: ...est the glitch capture 3 17 To test the single clock single edge state acquisition 3 23 To test the multiple clock multiple edge state acquisition 3 34 To test the single clock multiple edge state acq...

Page 24: ...examples in this chapter were performed using an 1664A The performance verification procedures starting on page 3 8 are each shown from power up To exactly duplicate the set ups in the tests save the...

Page 25: ...ey Load the disk containing the performance verification self tests into the disk drive normally the same as the boot disk 4 Select the box labeled Continue and press the Select key 5 After the test f...

Page 26: ...ws how to run all tests at once When the tests finish the status for each test shows Passed or Failed and the status for the All System Tests changes from Untested to Tested Note that the Front Panel...

Page 27: ...and the screen changes to half bright c Select Continue and the test screen shows the Display Test status changed to Tested 12 Record the results of the tests on the performance test record at the end...

Page 28: ...tions of Berg strip a Solder a jumper wire to all pins on one side of the Berg strip b Solder a jumper wire to all pins on the other side of the Berg strip c Solder two resistors to the Berg strip one...

Page 29: ...de of the Berg strip b Solder a jumper wire to all pins on the other side of the Berg strip c Solder the center of the BNC connector to the center pin of one row on the Berg strip d Solder the ground...

Page 30: ...the limits listed on the performance test record Equipment Required Equipment Critical Specifications Recommended Model Part Digital Multimeter 0 1 mV resolution 0 005 accuracy Agilent 3458A Function...

Page 31: ...eld Select Timing in the pop up menu Connect the logic analyzer 1 Using the 17 by 2 test connector BNC cable and probe tip assembly connect the data and clock channels of pod 1 to one side of the BNC...

Page 32: ...fy the voltage The activity indicators for pod 1 should show all data channels and the J clock channel at a logic high 3 Using the Modify down arrow on the function generator decrease offset voltage i...

Page 33: ...rator increase offset voltage in 1 mV increments until all activity indicators for pod 1 show the channels at a logic high Record the function generator voltage in the performance test record Testing...

Page 34: ...fy down arrow on the function generator decrease offset voltage in 1 mV increments until all activity indicators for pod 1 show the channels are at a logic low Record the function generator voltage in...

Page 35: ...lock channel at a logic high 3 Using the Modify down arrow on the function generator decrease offset voltage in 1 mV increments until all activity indicators for pod 1 show the channels at a logic low...

Page 36: ...channel at a logic high 3 Using the Modify down arrow on the function generator decrease offset voltage in 1 mV increments until all activity indicators for pod 1 show the channels at a logic low Reco...

Page 37: ...ing the Modify down arrow on the function generator decrease offset voltage in 1 mV increments until all activity indicators for pod 1 show the channels at a logic low Record the function generator vo...

Page 38: ...ector and probe tip assembly connect the data and clock channels of pod 2 to the output of the function generator 2 Start with Test the TTL threshold on page 3 10 substituting pod 2 for pod 1 Testing...

Page 39: ...igitizing Oscilloscope 6 GHz bandwidth 58 ps rise time Agilent 54121T SMA Coax Qty 3 18 GHz bandwidth Agilent 8120 4948 Adapter Qty 4 SMA m BNC f Agilent 1250 1200 Coupler Qty 4 BNC m m Agilent 1250 0...

Page 40: ...Config key Assign all pod fields to Machine 1 To assign the pod fields select the pod fields then select Machine 1 in the pop up menu 2 In the Analyzer 1 box select the Type field Select Timing in th...

Page 41: ...put To 8131A Channel 1 Output To 8131A Channel 2 Output To 8131A Channel 2 Output 1 Pod 1 ch 0 2 4 6 J clock Pod 1 ch 1 3 5 7 Pod 1 ch 8 10 12 14 Pod 1 ch 9 11 13 15 2 Pod 2 ch 0 2 4 6 K clock Pod 2 c...

Page 42: ...pond to the channels being tested The channels being tested are the channels connected to the pulse generator in Connect the logic analyzer a Select the pod field then select one of the two pods in th...

Page 43: ...els 1 and 2 are 3 450 ns 50 ps or 100 ps If necessary adjust the pulse widths of the pulse generator channels 1 and 2 5 Set up the Waveform menu to view all the channels a Select one of the Glitch lab...

Page 44: ...The display should be similar to the figure below Record Pass or Fail in the performance test record Test the next channels Return to Connect the logic analyzer on page 3 18 and connect and test the n...

Page 45: ...option 020 Digitizing Oscilloscope 6 GHz bandwidth 58 ps rise time Agilent 54121T Adapter SMA m BNC f Agilent 1250 1200 SMA Coax Cable Qty 3 18 GHz bandwidth Agilent 8120 4948 BNC Cable BNC m m 48 in...

Page 46: ...1 Channel 2 Display on on Probe Atten 20 00 20 00 Offset 1 3 V 1 3 V Volts Div 400 mV 400 mV Set up the logic analyzer 1 Set up the Configuration menu a Press the Config key b In the Configuration men...

Page 47: ...Trigger then select All in the pop up menus b Select Count Off Press Select again then select Time in the pop up menu Select Done to exit the menu c Select the field labeled 1 under the State Sequenc...

Page 48: ...utput Connect to Agilent 8131A Channel 1 Output Connect to Agilent 8131A Channel 2 Output 1 Pod 1 channel 3 Pod 2 channel 3 Pod 1 channel 11 Pod 2 channel 11 J clock 3 Activate the data channels that...

Page 49: ...sition to Chan 2 then set Marker 1 at 1 3000 V Set Marker 2 Position to Chan 2 then set Marker 2 at 1 3000 V d In the oscilloscope Delta T menu select Start On Pos Edge 1 Select Stop on Neg Edge 1 e I...

Page 50: ...r 100 ps a Enable the pulse generator channel 1 and channel 2 outputs Leave channel 2 output disabled b In the oscilloscope Timebase menu select Sweep Speed 1 00 ns div c Select Delay Using the oscill...

Page 51: ...the setup hold combinations 2 Disable the pulse generator channel 2 COMP with the LED off 3 Using the Delay mode of the pulse generator channel 1 position the pulses according to the setup time of th...

Page 52: ...4 Select the clock to be tested a In the Master Clock menu select the clock field to be tested then select the clock edge as indicated in the table The first time through this test use the top clock...

Page 53: ...tisfied message appearing then the test passes Press Stop to halt the acquisition Record the Pass or Fail results in the performance test record 7 Test the next clock a Press the Format key then selec...

Page 54: ...channel 1 Delay then select Precision Edge Find in the oscilloscope Delta T menu Repeat this step until the pulses are aligned according to the setup time of the setup hold combination selected 11 Sel...

Page 55: ...d 13 for the next clock edge listed in the table in step 10 until all listed clock edges have been tested 14 Test the next setup hold combination a In the logic analyzer Format menu press Master Clock...

Page 56: ...tion 020 Digitizing Oscilloscope 6 GHz bandwidth 58 ps rise time Agilent 54121T Adapter SMA m BNC f Agilent 1250 1200 SMA Coax Cable Qty 3 18 GHz bandwidth Agilent 8120 4948 BNC Cable BNC m m 48 in 2...

Page 57: ...Edge 1 Channel Channel 1 Channel 2 Display on on Probe Atten 20 00 20 00 Offset 1 3 V 1 3 V Volts Div 400 mV 400 mV Set up the logic analyzer 1 Set up the Configuration menu a Press the Config key b A...

Page 58: ...n select All b Select the Count Off field then select Time in the pop up menu Select Done to exit the menu c Select the field labeled 1 under the State Sequence Levels Select the field labeled anystat...

Page 59: ...ct to Agilent 8131A Channel 1 Output Connect to Agilent 8131A Channel 2 Output 1 Pod 1 channel 3 Pod 2 channel 3 Pod 1 channel 11 Pod 2 channel 11 J clock K clock 3 Activate the data channels that are...

Page 60: ...Position to Chan 2 then set Marker 1 at 1 3000 V Set the Marker 2 Position to Chan 2 then set Marker 2 at 1 3000 V d In the oscilloscope Delta T menu select Start On Pos Edge 1 Select Stop On Neg Edg...

Page 61: ...scope verify that the data pulse width is 4 450 ns 50 ps or 100 ps a In the oscilloscope Timebase menu select Sweep Speed 1 00 ns div b Select Delay Using the oscilloscope knob position the data wavef...

Page 62: ...5 ns d Select Done to exit the setup hold combinations 2 Disable the pulse generator channel 2 COMP with the LED off 3 Using the Delay mode of the pulse generator channel 1 position the pulses accord...

Page 63: ...lses are aligned according to the setup time of the setup hold combination selected 0 0 ps or 100 ps 4 Select the clocks to be tested a Select the clock field to be tested and then select J K as the c...

Page 64: ...ould toggle to Difference Listing 6 Press the blue shift key then press the Run key If 2 4 acquisitions are obtained without the Stop Condition Satisfied message appearing then the test passes Press S...

Page 65: ...ope Delta T menu select Start On Pos Edge 1 Select Stop on Neg Edge 1 c Adjust the pulse generator channel 1 Delay then select Precision Edge Find in the oscilloscope Delta T menu Repeat this step unt...

Page 66: ...at menu select Master Clock b Turn off and disconnect the clocks just tested c Repeat steps 1 through 12 for the next setup hold combination listed in step 1 on page 3 40 until all listed setup hold c...

Page 67: ...e time Agilent 8131A option 020 Digitizing Oscilloscope 6 GHz bandwidth 58 ps rise time Agilent 54121T Adapter SMA m BNC f Agilent 1250 1200 SMA Coax Cable Qty 3 18 GHz bandwidth Agilent 8120 4948 BNC...

Page 68: ...dge 2 Channel Channel 1 Channel 2 Display on on Probe Atten 20 00 20 00 Offset 1 3 V 1 3 V Volts Div 400 mV 400 mV Set up the logic analyzer 1 Set up the Configuration menu a Press the Config key b As...

Page 69: ...en select All b Select the Count Off field then select Time in the pop up menu Select Done to exit the menu c Select the field labeled 1 under the State Sequence Levels Select the field labeled anysta...

Page 70: ...Connect to Agilent 8131A Channel 1 Output Connect to Agilent 8131A Channel 2 Output 1 Pod 1 channel 3 Pod 2 channel 3 Pod 1 channel 11 Pod 2 channel 11 J clock 3 Activate the data channels that are c...

Page 71: ...e left of the display c In the oscilloscope Measure menu select Measure Chan 2 then select Width If the positive going pulse width is more than 20 000 ns go to step d If the pulse width is less than o...

Page 72: ...cope Delta V menu set the Marker 1 Position to Chan 1 then set Marker 1 at 1 3000 V Set the Marker 2 Position to Chan 1 then set Marker 2 at 1 3000 V d In the oscilloscope Delta T menu select Start On...

Page 73: ...p combination in the following table Setup Hold Combinations 4 0 0 0 ns 0 0 4 0 ns 2 0 2 0 ns d Select Done to exit the setup hold combinations 2 Using the Delay mode of the pulse generator Channel 2...

Page 74: ...Run The display should show a checkerboard pattern of alternating A and 5 Scroll through the display to verify b Press the List key In the pop up menu use the RPG knob to move the cursor to Compare Pr...

Page 75: ...Press the Format key then select Master Clock and turn off the clock just tested b Repeat steps 1 through 7 for the next setup hold combination listed in step 1 until all listed setup hold combination...

Page 76: ...idth 600 ps rise time Agilent 8131A Option 020 Function Generator Accuracy 5 10 6 frequency Agilent 3325B Option 002 SMA Cable Agilent 8120 4948 Adapter BNC m SMA f Agilent 1250 2015 BNC Test Connecto...

Page 77: ...abled LED Off Phase 0 0 deg DC Offset 0 0 V Set up the logic analyzer 1 Set up the Configuration menu a Press the Config key b In the Configuration menu assign Pod 1 to Machine 1 To assign Pod 1 selec...

Page 78: ...owing the channel assignments for Pod 1 Deactivate all channels by pressing the Clear entry key Using the arrow keys move the selector to Channel 0 Press the Select key to put an asterisk in the chann...

Page 79: ...field Type 1 then press Done g Move the cursor to the O pat field Type 20 then press Done h Select the Markers Patterns field then select Statistics Select Reset Statistics to initialize the statisti...

Page 80: ...runs as indicated in the pattern statistics field 3 When the logic analyzer has acquired at least 100 valid runs touch Stop The Min X O field in the logic analyzer Pattern Statistics menu should read...

Page 81: ...mV TTL VL TTL VH ECL VL ECL VH User VL User VH User VL User VH 0 V User VL 0 V User VH 1 355 V 1 645 V 1 439 V 1 161 V 6 280 V 5 720 V 5 720 V 6 280 V 100 mV 100 mV ________ ________ ________ ________...

Page 82: ...Clock Multiple Edge Acquisition Pass Fail Pass Fail Setup Hold Time 4 5 0 0 ns J K ________ J K ________ Setup Hold Time 0 0 4 5 ns J K ________ J K ________ Setup Hold Time 2 0 2 5 ns J K ________ J...

Page 83: ...4 Logic analyzer calibration 4 2 To adjust the CRT monitor alignment 4 3 To adjust the CRT intensity 4 5 Calibrating and Adjusting...

Page 84: ...of the analyzer refer to Testing Performance in chapter 3 Logic analyzer calibration The logic analyzer circuitry of the 1664A Logic Analyzer does not require an operational accuracy calibration To t...

Page 85: ...r then disconnect the power cord Remove the cover Refer to chapter 6 Replacing Assemblies for instructions to remove the cover 2 Connect the power cord insert the operating system disk into the disk d...

Page 86: ...to straighten the display 6 If the grid pattern is not centered horizontally adjust the H Hold 7 If you need to adjust the intensity go to the next page If you are finished with the adjustments turn o...

Page 87: ...he logic analyzer 3 Access the Display Test If you just finished adjusting the CRT monitor alignment go to step 4 To Access the Display Test perform the following steps a Insert the disk containing th...

Page 88: ...r against the display at center screen The light power meter should read 5 27 cd m2 If the reading is not correct try adjusting the contrast in step 7 closer to the limit 10 Press the front panel Sele...

Page 89: ...sts 5 16 To test the power supply voltages 5 21 To test the CRT monitor signals 5 23 To test the keyboard signals 5 24 To test the disk drive voltages 5 25 To perform the BNC test 5 27 To test the log...

Page 90: ...ive assemblies This instrument can be returned to Agilent Technologies for all service work including troubleshooting Contact your nearest Agilent Technologies Sales Office for more details C AU TI O...

Page 91: ...Troubleshooting Flowchart 1 Troubleshooting To use the flowcharts 5 3...

Page 92: ...Troubleshooting Flowchart 2 Troubleshooting To use the flowcharts 5 4...

Page 93: ...Troubleshooting Flowchart 3 Troubleshooting To use the flowcharts 5 5...

Page 94: ...Troubleshooting Flowchart 4 Troubleshooting To use the flowcharts 5 6...

Page 95: ...Troubleshooting Flowchart 5 Troubleshooting To use the flowcharts 5 7...

Page 96: ...Troubleshooting Flowchart 6 Troubleshooting To use the flowcharts 5 8...

Page 97: ...Troubleshooting Flowchart 7 Troubleshooting To use the flowcharts 5 9...

Page 98: ...Troubleshooting Flowchart 8 Troubleshooting To use the flowcharts 5 10...

Page 99: ...Troubleshooting Flowchart 9 Troubleshooting To use the flowcharts 5 11...

Page 100: ...Troubleshooting Flowchart 10 Troubleshooting To use the flowcharts 5 12...

Page 101: ...Troubleshooting Flowchart 11 Troubleshooting To use the flowcharts 5 13...

Page 102: ...Troubleshooting Flowchart 12 Troubleshooting To use the flowcharts 5 14...

Page 103: ...isconnect all inputs then insert the operating system disk into the disk drive 2 Let the instrument warm up for a few minutes then cycle power by turning off then turning on the power switch If the in...

Page 104: ...re complete 2 Press the System key then select the field next to System Select Test in the pop up menu and then press the Select key 3 Select the box labeled Load Test System then press the select key...

Page 105: ...petitive Select Stop to halt a Run Repetitive 7 Select Board Tests then select Run When the Board Tests are finished select Done 8 Select Data Input Inspection All lines should show activity Select Do...

Page 106: ...by running All System Tests To see more details about each test you can run each test individually This example shows how to run an individual test 11 Select ROM Test The ROM Test screen is displayed...

Page 107: ...the front panel appears on the screen a Press each key on the front panel The corresponding key on the screen will change from a light to a dark color b Test the knob by turning it in both directions...

Page 108: ...menu and press the select key Reinstall the disk containing the operating system then select Exit Test System and press the select key If you are performing the self tests as part of the troubleshoot...

Page 109: ...dicated by the figure below Loaded by the added resistor 1 Turn off the instrument then remove the power cable Remove the cover of the instrument and the disk drive assembly 2 Remove the power supply...

Page 110: ...ly Cable Pin Signal Pin Signal 1 5 00 V 11 5 20 V 2 5 00 V 12 Ground 3 5 00 V 13 12 V 4 5 00 V 14 Ground 5 Ground Digital 15 12 V 6 Ground Digital 16 Ground 7 Ground Digital 17 12 V Display 8 Ground D...

Page 111: ...as fire and electrical shock 1 Remove the cover of the instrument 2 Check the CRT monitor input cable for the signals and the power supplies listed in the table below The cable is the wide ribbon cabl...

Page 112: ...g then go to the next step If a group of keys do not work then check the keyboard voltages and signals Keyboard Connector Signals Pin Signal Pin Signal 1 Keyboard Return 13 Keyboard Scan 2 14 3 15 4 1...

Page 113: ...n remove the power cable Remove the instrument cover and the disk drive 2 Reconnect the disk drive cable to the rear of the disk drive Turn the disk drive over so that the solder connections of the ca...

Page 114: ...18 Direction 19 Ground 20 Step 21 Ground 22 Write Data 23 Ground 24 Write Gate 25 Ground 26 Track 00 27 Ground 28 Write Protect 29 Ground 30 Read Data 31 Ground 32 Side Select 33 Ground 34 Ready 7 Se...

Page 115: ...Trig key Select Clear Trigger All b Select Arming Control In the Arming Control pop up menu select the field labeled Run then select Port In Press the Done key 5 Attach a BNC shorting cap to the Exter...

Page 116: ...4 BNC m m Agilent 1250 0216 6x2 Test Connectors Qty 4 1 Turn on the equipment required Insert the operating system disk and turn on the logic analyzer 2 Set up the pulse generator a Set up the pulse g...

Page 117: ...nels are all assigned all asterisks Press the Done key c Select Master Clock then select a double edge for the clock of the pod under test Turn off the other clocks d In the Master Clock menu select S...

Page 118: ...ect TTL 5 Set up the Trigger menu a Press the Trigger key b Select Clear Trigger then select All 6 Set up the Listing menu a Press the List key b Select the field to the right of Base then select Bina...

Page 119: ...der test and the clock channel to the pulse generator channel 2 Output d Connect the odd numbered channels of the upper byte of the pod under test to the pulse generator channel 2 Output 8 On the logi...

Page 120: ...rt is removed the circuit will reset in approximately 1 minute There should be 5 V after the 1 minute reset time Equipment Required Equipment Critical Specifications Recommended Model Part Digital Mul...

Page 121: ...er supply 6 7 Main circuit board 6 7 Switch actuator assembly 6 8 Rear panel assembly 6 9 Front panel and keyboard 6 10 Intensity adjustment 6 10 Monitor 6 11 Handle plate 6 11 Fan 6 12 Line filter 6...

Page 122: ...on or when the power cable is connected Never attempt to remove or install any assembly with the instrument on or with the power cable connected Replacement Strategy These replacement procedures are o...

Page 123: ...ge A7 Disk drive MP9 Cover W4 Jumper cable white A8 Monitor assembly MP15 Rear feet W5 Power supply cable A9 Fan MP18 Mounting plate W6 Front panel cable MP19 Insulator W7 Monitor sweep cable H2 Groun...

Page 124: ...Exploded View of the 1664A Replacing Assemblies 6 4...

Page 125: ...sconnect the logic analyzer cables from the rear panel 2 Using the previous procedures remove the handle and the four rear feet 3 Remove the seven screws from the front molding then slide the molding...

Page 126: ...k drive toward the rear of the instrument then lift it up and out 5 Remove the disk drive bracket To remove the disk drive bracket remove the four screws that attach the disk drive bracket to the disk...

Page 127: ...5 Reverse this procedure to install the power supply Check that the following assemblies are properly installed before installing the power supply Monitor Front Panel Switch Actuator Main Circuit Boar...

Page 128: ...ch assembly 4 Remove the switch actuator assembly from the front of the cabinet To remove depress the retaining ears on both sides of the assembly next to the front panel and push the assembly out the...

Page 129: ...connecting the parallel printer connector socket to the rear panel 6 Remove the two screws connecting the keyboard connector socket to the rear panel 7 Remove the six rear panel screws 8 Lift the rear...

Page 130: ...e keyboard circuit board away from the front panel 7 Lift the elastomeric keypad out of the front panel 8 Reverse this procedure to assemble and install the front panel assembly When assembling the fr...

Page 131: ...de the CRT driver board up out of the chassis 6 Using a nut driver remove the three hex nuts attaching the monitor and ground bracket to the chassis then remove the screw 7 Slide the monitor assembly...

Page 132: ...f the fan If you mount the fan backwards the instrument will overheat Also check the correct polarity of the fan cable To remove and replace the line filter 1 Using previous procedures remove the foll...

Page 133: ...the main circuit board 3 Remove the two hex standoffs connecting the GPIB cable then slide the GPIB cable forward and out of the rear panel 4 Remove the two hex standoffs connecting the RS 232C cable...

Page 134: ...equired or failure indications 2 Remove accessories from the logic analyzer Only return accessories to Agilent Technologies if they are associated with the failure symptoms 3 Package the logic analyze...

Page 135: ...7 Replaceable Parts Ordering 7 2 Exploded View 7 3 Replaceable Parts List 7 4 Power Cables and Plug Configurations 7 8 Replaceable Parts...

Page 136: ...ilent Technologies Sales Office when the orders require billing and invoicing Transportation costs are prepaid there is a small handling charge for each order and no invoices In order for Agilent Tech...

Page 137: ...Exploded View Exploded view of the 1664A logic analyzer Replaceable Parts Exploded View 7 3...

Page 138: ...eplaceable parts list Information included for each part on the list consists of the following Reference designator Agilent Technologies part number Total quantity included with the instrument Qty Des...

Page 139: ...5 0680 2 MS 3 0 6 PH T10 rear panel to HIL connector H7 0380 1858 2 Jackscrew with lock printer port to rear panel H8 0515 0430 11 MS M3 0X0 5X6MM PH T10 main circuit assembly rear panel to chassis RS...

Page 140: ...19 01660 84501 1 Accessory pouch MP20 01660 40502 1 Trim strip MP21 01664 94301 1 ID label 1664A MP22 01660 94302 1 Line switch label MP23 01660 41901 1 Elastomeric keypad MP24 01660 47401 1 RPG knob...

Page 141: ...1858 2 Jackscrew with lock RS 232 Cable MP34 1258 0141 1 Removable jumper W8 01650 61613 1 GPIB Cable W9 01660 61601 1 RS 232C Cable Power Cords W10 8120 1521 1 Power Cord United Kingdow 900 8120 069...

Page 142: ...ower cable The type of power cable plug shipped with the instrument depends on the country of destination The W10 reference designators table previous page show option numbers of available power cable...

Page 143: ...60 Series Logic Analyzer 8 3 The Logic Acquisition Circuitry 8 6 Self Tests Description 8 9 Power up Self Tests 8 9 System Tests System PV 8 10 Analyzer Tests Analy PV 8 13 GPIB 8 15 RS 232C 8 16 Cent...

Page 144: ...operation for the logic analyzer and describes the self tests The information in this chapter is to help you understand how the logic analyzer operates and what the self tests are testing This inform...

Page 145: ...ry The block level theory is divided into two parts theory for the logic analyzer and theory for the main circuit board A block diagram is shown with each theory The 1664A Logic Analyzer The 1664A log...

Page 146: ...le display The video frame generator provides the horizontal and vertical synchronization timing signals The display RAM is made up of two 256Kx4 DRAMS configured as 256Kx8 and stores all of the pixel...

Page 147: ...troller serializes parallel data from the microprocessor for transmission At the same time the controller also receives serial data and converts the data to parallel data characters for the microproce...

Page 148: ...The Logic Acquisition Circuitry The Main Circuit Board Logic Acquisition Circuitry Theory of Operation The Logic Acquisition Circuitry 8 6...

Page 149: ...y matching the impedance of the probe cable channels with the impedance of the signal paths of the circuit board All 17 channels of each pod are terminated in the same way The signals are still reduce...

Page 150: ...ual pods The 16 data channels and the clock channel of each pod are all set to the same threshold voltage Test and Clock Synchronization Circuit ECLinPS TM ICs are used in the Test and Clock Synchroni...

Page 151: ...onitors test data for the logic analyzer to read The performance verification procedures in chapter 3 of this service guide make up the parametric performance verification for the logic analyzer Refer...

Page 152: ...circuitry is functioning properly Passing the Interrupt Test also implies that the interrupt generating devices are also functioning properly and not generating false interrupts This means that the mi...

Page 153: ...s sent to the keyboard controller and returned to the microprocessor by the keyboard controller The test pattern is then compared with a known value Passing the HIL test implies that the read write re...

Page 154: ...ne key Pressing the Done key a second time will cause an exit of this test The Front Panel Test passes when all of the key fields in the front panel mock up on the CRT can be toggled by pressing the c...

Page 155: ...ems of the IC are operating Checkerboard patterns of 1s and 0s are routed to the address and data buses and to the read write registers of each chip After verifying the communications pipelines the ac...

Page 156: ...assing this test implies that user defined ANDing and ORing of storage qualified data patterns will occur and that the occurrence counter that appears at each sequence level is functioning Clock Gener...

Page 157: ...the instrument function transfer measurement data and coordinate instrument operation Input and output of all messages in bit parallel byte serial form are also transferred on the data lines A 7 bit...

Page 158: ...tive Ground AA Not applicable 2 Transmitted Data TD BA Data from Mainframe High Space 0 12 V Low Mark 1 12 V 3 Received Data RD BB Data to Mainframe High Space 0 3 V to 25 V Low Mark 1 3 V to 25 V 4 R...

Page 159: ...2 Logic analyzer data LSB DATA0 3 Logic analyzer data DATA1 4 Logic analyzer data DATA2 5 Logic analyzer data DATA3 6 Logic analyzer data DATA4 7 Logic analyzer data DATA5 8 Logic analyzer data DATA6...

Page 160: ...8 18...

Page 161: ...es M 89 EMC CISPR 11 1990 EN 55011 1991 Group 1 Class A IEC 801 2 1991 EN 50082 1 1992 4 kV CD 8 kV AD IEC 801 3 1984 EN 50082 1 1992 3 V m IEC 801 4 1988 EN 50082 1 1992 1 kV Supplementary Informatio...

Page 162: ......

Page 163: ...ions are for trained service personnel To avoid dangerous electric shock do not perform any service unless qualified to do so Do not attempt internal service or adjustment unless another person capabl...

Page 164: ...usive remedies Agilent Technologies shall not be liable for any direct indirect special incidental or consequential damages whether based on contract tort or any other legal theory Assistance Product...

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