HP 181A manuals
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1 Assembly-LevelService Guide 3 Assembly-LevelService Guide5 ContentsPrefaceHow to Use This Guide Description of the 225 MHz Counters Options Accessories Supplied and Available Performance TestsEquipment Required HP 53131A/132A/181A Operational Verification 6 HP 53131A/132A Complete Performance TestsTest 1: Time Interval (HP 53131A/132A Only) Test 2: Trigger Level (HP 53131A/132A Only) Test 3: Channels 1 and 2 Frequency Sensitivity (HP 53131A/132A Only) Test 4: Channels 1 and 2 Frequency Accuracy (HP 53131A/132A Only) 7 Test 5: Option 030/050/124 Channel 3 FrequencySensitivity (HP 53131A/132A Only) Test 6: Option 030/050/124 Channel 3 Frequency Accuracy (HP 53131A/132A Only) Test 7: Peak Volts, Channels 1 and 2 (HP 53131A/132A HP 53131A/132A HP-IBVerification Program (Optional) HP 53131A/132A Performance Test Record 8 HP 53181A Complete Performance TestsTest 1: Trigger Level (HP 53181A Only) Test 2: Channel 1 Frequency Sensitivity (HP 53181A Test 3: Channel 1 Frequency Accuracy (HP 53181A Test 4: Option 015/030/050/124 Channel 2 Frequency Sensitivity Test 5: Option 015/030/050/124 Channel 2 Frequency Accuracy (HP 53181A Only) Test 6: Peak Volts, Channel 1 (HP 53181A Only) HP 53181A HP-IBVerification Program (Optional) HP 53181A Performance Test Record 9 ServiceReturning the Instrument to Hewlett-Packardfor Service About the HP 53131A/132A Calibration Menu The HP 53131A/132A Calibration Procedures 10 About the HP 53181A Calibration MenuThe HP 53181A Calibration Procedures Pre-TroubleshootingInformation Troubleshooting the Counter 11 3 Replacing AssembliesTools Required Do This First To Remove the Cover To Remove the Front Bezel To Remove A1 Motherboard Assembly To Remove the A2 Display Board, Keypads and Window To Remove A3 1.5/3.0/5.0/12.4 GHz Channel Assembly (Option 015/030/050/124) To Remove A4 AC Power Supply Assembly To Remove A5 DC Power Input Assembly (Option 002) To Remove A6 High Stability Timebase Assembly To Remove the Rear Terminals (Option 060) 12 Retrofitting OptionsTo Retrofit A3 1.5/3.0/5.0/12.4 GHz Channel Assembly (Option 015/030/050/124) To Retrofit A5 DC Power Input Assembly (Option To Retrofit A6 High Stability Timebase Assembly To Retrofit the Rear Terminals (Option 060) Replaceable PartsExchange Assemblies Reference Designations Replaceable Parts How To Order A Part Cabinet Parts and Hardware 13 BackdatingManual Changes Older Instruments Backdating Hardware Backdating Firmware Backdating Specifications 7 HP 53131A/132A Specifications 8 HP 53181A Specifications Index 15 Preface16 Instruments Covered by this GuideAssembly-LevelService Guide Organization 17 How to Order Guides18 HP 53131AHP 53132A HP 53181A 20 NOTEHardware 21 SupportAccessories Supplied Accessories Available 24 IntroductionOperational Verification 25 Complete Performance TestsOptional HP-IBVerification For HP 53131A/132A Counters For HP 53181A Recommended Calibration Cycle Test Record 26 Equipment RequiredTable 1-1.Recommended Test Equipment 27 HP 53131A/132A/181A Operational VerificationPower-OnSelf Tests 1 Inspect the Counter for any damage 2 Make sure no cables are connected to the input channels (rear and front panels) of the Counter 3 Connect the power cord to the Counter, and connect the other end of the power cord to the primary power source 4 Press POWER key to turn on the Counter 28 5Verify that the following happens:•SELFTST: PASS is displayed HP-IB AT n Freq Ch1 Connect the Counter’s 10 MHz Out Figure 1-1A.Operational Verification Setup for HP 53131A/132A 30 Run Self Test1Disconnect the input signals from the Counter Power down (turn off the Counter), press and hold Recall (Utility) 3Press Recall key until TEST: ALL ? is displayed 4Press Enter key ALL: PASS ALL: FAIL Termination Check 1Cycle the POWER key to preset the Counter 2Connect a digital voltmeter (DVM) to CHANNEL 1 as shown in Figure 1-2, and set it to measure ohms (set DVM to appropriate Ω range) HP 3458A Digital Multimeter Figure 1-2.Termination Check Setup 32 External Arm Test (HP 53131A/132A Only)33 1 Set the Pulse Generator to the following:2 Connect the equipment as shown in Figure Pulse Generator Figure 1-3.External Arm Test Setup (HP 53131A/132A Only) 34 Set the HP 8663A to output a 200 MHz, 100 mV sine wave signal toChannel On the Counter, Press Run key Send a single pulse by pressing the MAN key on the HP 8130A, and observe that with each press the Gate annunciator flashes External Timebase Tests 35 1 MHz External Timebase Input (HP 53131A and HP 53181A Only)1 Connect the equipment as shown in Figure Figure 1-4.External Timebase Test Setup 2Cycle the POWER key to preset the Counter Set Synthesizer #1 (i.e., the HP 3325B connected to the Ref In 1 MHz, 200 mV rms sine wave signal ExtRef 36 5 MHz External Timebase Input (HP 53131A and HP 53181A Only)Change the frequency of Synthesizer # 1, which is connected to the Counter’s 2On the Counter, press Run key 10 MHz External Timebase Input (HP 53131A and HP 53181A Only) Change the frequency of Synthesizer #1, which is connected to the Counter’s 4Disconnect the test setup 37 10 MHz External Timebase Input for the HP 53132A1Connect the equipment as shown in Figure Set Synthesizer #1 (i.e., the HP 3325B that is connected to the Mark Pass or Fail in the HP 53131A/132A Performance Test Record on 5Disconnect the test setup 38 HP 53131A/132A Complete Performance TestsThe specifications of the HP 53131A/132A Universal Counter can be Record the results of the performance tests in the appropriate place on HP 53131A/132A Performance Test Record, which starts on page Table 1-2.The HP 53131A/132A Performance Tests 40 Connect the pulse generator signal to Channel 1 of the Counter as shown inHP53131A/132Pulse Generator Figure 1-5.Time Interval (Channel 1 TO 2) Test Setup 2 Set the Pulse Generator to the following: 3On the Counter, Press Single/Stop key 41 Test 2: Trigger Level (HP 53131A/132A Only)2Set CHANNEL 1 input conditions to: Trigger/Sensitivity, LEVEL: 0.000V 50Ω/1MΩ, 50Ω 3Set CHANNEL 2 input conditions to: 42 Connect the output of the HP 3325B to Channel 1 of the Counter as shown inHP 53131A/132A Synthesizer Figure 1-6.Trigger Level Test Setup 2Set the HP 3325B to output a 1 MHz, 80 mVp-psquare wave signal 3Set the HP 3325B DC OFFSET to −60 mV 4On the Counter, press Run key Now, increment the dc offset on the HP 3325B by +1 mV until the Counter’s stable 1 MHz Add the upper peak voltage (40 mV) of the 80 mV 45 100 kHz to 100 MHz Sensitivity for HP 53131A/132AFigure 1-7.Channels 1 and 2 Frequency Sensitivity Test Setup 46 2Set the HP 8663A Signal Generator to output a 100 MHz−35.0 dBm sine wave signal (−20.0 dBm for Option 060 Rear Terminals) to the Counter’s Channel 1 input 3On the Counter, press Run key In 0.1 dB steps, increase the power level until the Counter displays a Sweep the frequency from 100 MHz to 100 kHz For Option 060, sweep frequencies from 225 MHz to 100 kHz Counters with Option 060 should read frequencies from 225 MHz to 100 kHz at ≤ − 9.5 dBm (75 mVrms) If you are testing a Counter with front-panel terminals (Standard) If you are testing a Counter with rear terminals (Option 060) 7Connect the HP 8663A to Channel 2 of the Counter 8On the Counter, press Freq & Ratio key until FREQUENCY 2 is displayed 9Repeat steps 2 through 5 for Channel 47 100 MHz to 200 MHz Sensitivity for HP 53131A/132AIncrease the power level by 0.1 dB steps until the Counter displays a 4Sweep the signal generator frequency from 200 MHz to 100 MHz 5Record the actual reading in the Performance Test Record (Test 3, Line 3) 6Connect the signal generator to Channel 7On the Counter, press Freq & Ratio key until Frequency 1 is displayed 48 8Repeat steps 1 through 4 for Channel9Record the actual reading in the Performance Test Record (Test 3, Line 4) 200 MHz to 225 MHz Sensitivity for HP 53131A/132A 4Sweep the signal generator frequency from 225 MHz to 200 MHz 5Record the actual reading in the Performance Test Record (Test 3, Line 5) 7On the Counter, press Freq & Ratio key until Frequency 2 is displayed 9Record the actual reading in the Performance Test Record (Test 3, Line 6) 10Disconnect the test setup 49 Test 4: Channels 1 and 2 Frequency Accuracy (HP 53131A/132A Only)2Using the Gate & ExtArm key, set the gate time to TIME 1.000 s 50 Figure 1-8.Channels 1 and 2 Frequency Accuracy Test Setup2Set the Signal Generator to output 1 MHz at −7 dBm 51 Change the signal generator frequency to 100 MHzChange the signal generator frequency to 200 MHz Change the signal generator frequency to 225 MHz 11Connect the signal generator to Channel 12On the Counter, press Freq & Ratio key until Frequency 1 is displayed 13Repeat steps 2 through 9 for Channel 15Disconnect the test setup 52 Test 5: Option 030/050/124 Channel 3 Frequency Sensitivity (HP53131A/132A Only) 2Set the Counter as follows: Freq & Ratio, FREQUENCY 53 100 MHz to 2.5 GHz Sensitivity for HP 53131A/132A Option 030 only54 2.7 to 3.0 GHz Sensitivity for Option 030 only55 200 MHz to 5.0 GHz Sensitivity for HP 53131A/132A(Option 050 only) 56 200 MHz to 12.4 GHz Sensitivity for HP 53131A/132A(Option 124 only) 57 Test 6: Option 030/050/124 Channel 3 Frequency AccuracyFreq & Ratio, FREQUENCY Gate & ExtArm, TIME: TIME 1.000 s 1Connect equipment as shown in Figure (NOTE: For Options 050 and 124, skip steps 2 through 5. Proceed to step 6.) 2Set the HP 8663A Synthesized Signal Generator to output 100 MHz at −17.0 dBm 58 Set the HP 8340B to output 3.0 GHz atSet the HP 8340B to output 5.0 GHz at 10Set the HP 8340B to output 12.4 GHz at −17 dBm. (This step is for Option 124 only.) 59 Test 7: Peak Volts, Channels 1 and 2 (HP 53131A/132A Only)2Press Other Meas key until VOLT PEAKS 1 is displayed 3Set CHANNEL 1 input to: 50Ω/1MΩ, 50Ω 4Set CHANNEL 2 input to: 60 HP 53131A/132ASynthesizerFigure 1-10.Peak Volts Test Setup 2Set the HP 3325B to output a 2 MHz, 2 Vp-psine wave Record the actual reading in the Performance Test Record (Test 7, Line 1a) Record the actual reading in the Performance Test Record (Test 7, Line 1b) 61 Remove the signal from Channel 1 of the Counter and connect itto Channel Press Other Meas key until VOLT PEAK 2 is displayed (Test 7, Line 2a) (Test 7, Line 2b) 62 HP 53131A/132A HP-IBVerification Program (Optional)Load “VER31” RUN 2Follow the instructions displayed in the computer’s screen After running this program, record the result (Pass or Fail) on the last page 63 HP 53131A/132A Performance Test Record (Page 1 of 6)64 HP 53131A/132A Performance Test Record (Page 2 of 6)65 HP 53131A/132A Performance Test Record (Page 3 of 6)66 HP 53131A/132A Performance Test Record (Page 4 of 6)67 HP 53131A/132A Performance Test Record (Page 5 of 6)68 HP 53131A/132A Performance Test Record (Page 6 of 6)69 HP 53181A Complete Performance TestsHP 53181A Frequency Counter place on HP 53181A Performance Test Record, which starts on page Table 1-3.The HP 53181A Performance Tests 70 Test 1: Trigger Level (HP 53181A Only)2Set CHANNEL 1 input condition to: 71 HP 53181ASynthesizerFigure 1-11.Trigger Level Test Setup 73 Test 2: Channel 1 Frequency Sensitivity (HP 53181A Only)74 100 kHz to 100 MHz Sensitivity for HP 53181AFigure 1-12.Channels 1 Frequency Sensitivity Test Setup Set the HP 8663A Signal Generator to output a 100 kHz Channel 1 input 75 Sweep the frequency from 100 kHz to 100 MHzFor Option 060, sweep frequencies from 100 kHz to 225 MHz 5Record the actual reading in the Performance Test Record (Test 2, Line 1) 76 100 MHz to 200 MHz Sensitivity for HP 53181A1Change the signal generator settings to 110 MHz at −30 dBm 3Sweep the signal generator frequency from 100 MHz to 200 MHz 4Record the actual reading in the Performance Test Record (Test 2, Line 2) 200 MHz to 225 MHz Sensitivity for HP 53181A 1Change the signal generator settings to 200 MHz at −30 dBm 3Sweep the signal generator frequency from 200 MHz to 225 MHz 4Record the actual reading in the Performance Test Record (Test 2, Line 3) 77 Test 3: Channel 1 Frequency Accuracy (HP 53181A Only)2Using the Gate & ExtArm key, set gate time to TIME 1.000 s 80 Test 4: Option 015/030/050/124 Channel 2 Frequency Sensitivity81 100 MHz to 1.5 GHz Sensitivity for Option 015 Only82 Increase the power level in 1 dB steps until the Counter reads500 MHz Sweep the frequencies from 100 MHz to 1.5 GHz (Test 4, Line 1) 100 MHz to 2.7 GHz Sensitivity for Option 030 Only 2On the Counter, Press Run key 3Increase the power level in 1 dB steps until the Counter reads 500 MHz 4Sweep the frequencies from 100 MHz to 2.7 GHz 5Record the actual reading in the Performance Test Record (Test 4, Line 2) 83 2.8to 3.0 GHz Sensitivity for Option 030 Only200 MHz to 5.0 GHz Sensitivity for Option 050 only 84 200 MHz to 12.4 GHz Sensitivity for Option 124 only85 Test 5: Option 015/030/050/124 Channel 2 Frequency Accuracy (HP53181A Only) 100 MHz to 1.5 GHz Accuracy Test for Option MEASURE/Freq & Ratio, FREQUENCY 87 Test 5: Option 015/030/050/124 Channel 2 Frequency Accuracy (HP 53181A Only)Change the synthesized signal generator’s frequency to 1.5 GHz Record the actual reading in the Performance Test (Test 5, Line 2) Minimum to Maximum Accuracy Test for Options 030/050/124 91 Figure 1-16.Peak Volts Test SetupRecord the actual readings in the Performance Test Record (Test 6, Line a) Record the actual readings in the Performance Test Record (Test 6, Line b) 3Disconnect the test setup 92 HP 53181A HP-IBVerification Program (Optional)Load “VER81” 93 HP 53181A Performance Test Record (Page 1 of 4)94 HP 53181A Performance Test Record (Page 2 of 4)95 HP 53181A Performance Test Record (Page 3 of 4)96 HP 53181A Performance Test Record (Page 4 of 4)98 Returning the Instrument toAbout the HP 53131A/132A Calibration Menu The HP 53131A/132A Calibration Procedures About the HP 53181A Calibration Menu The HP 53181A Calibration Procedures Pre-Troubleshooting Information Troubleshooting the Counter 99 Returning the Instrument to Hewlett-Packardfor ServiceTo Provide Repair Information 1Write the following information on a tag: 2Attach the tag to the instrument 3Pack the instrument 100 To Pack in the Original Packaging Materials3Make sure one of the polystyrene block is in its proper position in the box 4Place the instrument, front panel end first, on the polystyrene block 7Seal the shipping container securely 101 To Pack in the Commercially Available MaterialsWrap the instrument in heavy paper or plastic Place the instrument in a strong shipping container Protect the control panel with cardboard Add a layer of shock-absorbingmaterial Mark the shipping container FRAGILE 102 About the HP 53131A/132A Calibration MenuOverview of the HP 53131A/132A Calibration Menu Scale & Offset 103 CAL SECURECAL UNSECURE) CAL: OFFS 1 / 2 GAIN 1 / 2 CAL: TI QUIK CAL: TI FINE?) CAL SECURE 104 The HP 53131A/132A Calibration Menu Treekey to access this menu. This menu does not exist in early versions (firmware revisions 3317, 3335, and 3402) of the HP 53131A/132A In the early versions of the Counter, the CAL: menu item resides in the Utility menu, and there is no calibration security capability. See Chapter 6, “Backdating,” in this guide for correct calibration procedures 105 CAL UNSECURE1Press and hold Scale & Offset key, then cycle POWER key 2Press Scale & Offset key until CODE: is displayed Press the appropriate arrow keys to enter the security code “ CAL UNSECURE is displayed BAD CODE 2Unsecure for calibration by performing the preceding procedure 3Press Scale & Offset key until CAL: OFFS1? is displayed 106 Press any one of the arrow keys until your calibration choice (that isCAL: OFFS2 CAL: GAIN 1 CAL: GAIN 2 CAL: TI QUIK CAL: TI FINE 5Press Enter key Follow the instructions in the scrolling message, and press CALIBRATING OFFS 1 PASS INFORMATION ABOUT CAL:TI QUIK? AND CAL:TI FINE 107 Notes Pertaining to CAL: TI QUIKAdvantage: Disadvantage: Input signal: Timebase: Procedure: Notes Pertaining to CAL: TI FINE Equipment: 108 Equipment and Counter Setup: See FigureFigure 2-1.Calibration Setup for CAL: TI FINE Out of HP 8130A, into HP 59992A J06 Calibrator Signal: 109 Press and hold Scale & Offset key, then cycle POWER keyPress Scale & Offset key until CODE: is displayed Press the appropriate arrow keys to enter the security code, then press Enter key To Change to a New Security Code 3Press Scale & Offset key until CODE: is displayed NEW CODE IS 110 2Press Scale & Offset key until CAL COUNT? is displayedPress any one of the entry keys (arrow 2Press Scale & Offset key until HELP: CAL? is displayed 3Press any one of the arrow keys until your help choice (that is HELP: CAL?, HELP: SECURE?, HELP: CODE?) is displayed ) is displayed 4Press Enter key to display the help information 111 The HP 53131A/132A Calibration ProceduresPress and hold Recall (Utility) key, then cycle POWER key REV: n then perform the calibration procedures in Chapter 6, “Backdating.” To Calibrate the Offset for Channels 1 and To access the Calibration menu, power down, and press and hold the 2Press Scale & Offset key until CODE: 0 is displayed 112 3 Press the appropriate arrow keys to enter the security codePress g key four times Press d key five times Press g key once, and then press d key three times Press g key once, and then press d key once Finally, press Enter key BAD CODE 4 Press Scale & Offset key until CAL: OFFS 1 ? is displayed Press Enter key 113 display OFFS 1 PASSTo calibrate Channel 2, press any one of the arrow keys until CAL: OFFS 2 ? is displayed is displayed display OFFS 2 PASS 114 To Calibrate the Gain for Channels 1 and1Press any one of the arrow keys until CAL: GAIN 1 ? is displayed 2Press Enter key 3Connect a BNC tee connector to Channel 1 of the Counter Connect the Counter, dc power supply, and digital multimeter as shown in DC Power Supply Figure 2-2.Gain Calibration Setup Adjust the power supply until the digital multimeter displays + 5.000 V ± 0.001 7Press Enter key GAIN 1 PASS 115 To calibrate the gain for Channel 2, connect the input or theBNC Tee to Channel 2 of the Counter Press any one of the arrow keys until CAL: GAIN 2 ? is displayed Press Enter key again display GAIN 2 PASS Disconnect the calibration setup To Calibrate Time Interval 116 CAL: TI QUIK? Calibration1Press any one of the arrow keys until CAL: TI QUIK? is displayed HP53131A/132A Pulse Generator Figure 2-3.Calibration Setup for CAL: TI QUIK 4Set the HP 8130A as follows: PERIOD: 100 ns 117 TI CAL PASS6Disconnect the calibration setup CAL: TI FINE? Calibration Figure 2-4.Calibration Setup for CAL: TI FINE 118 2 Set the HP 8130A as follows:3 Press any one of the arrow keys until CAL: TI FINE? is displayed Note the Counter display message prompts you to press buttons on the HP 59992A J06 Calibrator for each part of a four-part calibration Note that CAL: TI FINE? requires the completion of four steps in the proper order 5 Press Enter key after each displayed instruction 119 House Standard10 MHz Reference Figure 2-5.Standard Timebase Calibration Setup With an insulated tuning tool, turn the OSC Adjust 120 To Calibrate the High Stability Timebase Option(Medium, High, or Ultra-High) Allow the Counter to warm up for approximately 24 hours before performing this calibration 1 Connect the output of a 10 MHz house standard to Channel 1 of the Counter as shown in Figure 2 Press any one of the arrow keys until CAL: TIMEBAS? is displayed 3 Press Enter key and follow the instructions in the scrolling message that appears in the Counter display 4 Press Enter key after each instruction TB CAL PASS 121 About the HP 53181A Calibration MenuOverview of the HP 53181A Calibration Menu CAL: OFFS 1?, GAIN 1 123 The HP 53181A Calibration Menu Tree124 BAD CODE125 Press the appropriate arrow keys to enter the security code, then press126 To Change to New the Security Code127 The HP 53181A Calibration ProceduresTo Calibrate the Offset for Channel 3Press the appropriate arrow keys to enter the security code a.Press key four times b.Press key five times 128 key once, and then presskey three times key once key eight times 4Press Scale & Offset key until CAL: OFFS 1 ? is displayed 6Press Enter key 129 To Calibrate the Gain for Channel2Press Enter key key 3Connect a BNC tee connector to Channel 1 of the HP 53181A 4Connect the Counter, dc power supply, and digital multimeter shown in Figure Figure 2-6.Gain Calibration Setup 5Adjust the power supply until the digital multimeter + 5.000 V ± 0.001 130 8Disconnect the calibration setupFigure 2-7.Standard Timebase Calibration Setup 132 Pre-TroubleshootingInformationSafety Considerations 133 Recommended Test Equipment134 Repair ConsiderationsElectrostatic Discharge ENSURE that DO NOT wear clothing subject to 4DO NOT handle components or assemblies in carpeted areas 6AVOID touching component leads. (Handle by packaging only.) Surface Mount Repair Disassembly and Reassembly Specifics 135 After Service ConsiderationsProduct Safety Checks RESISTANCE CHECKS DESCRIBED IN THE FOLLOWING TEXT REQUIRE THAT THE POWER CORD BE CONNECTED TO THE INSTRUMENT AND THAT AC POWER BE DISCONNECTED BE SURE THAT THE POWER CORD IS NOT CONNECTED TO POWER BEFORE PERFORMING ANY SAFETY CHECKS Product Performance Checks 136 Assembly Identification and LocationTable 2-1.HP 53131A Assembly Identification 137 Table 2-2.HP 53132A Assembly Identification138 Table 2-3.HP 53181A Assembly Identification139 Figure 2-8A.Instrument Top Internal View140 Figure 2-8B.Instrument Top Internal View (Option 002)141 Troubleshooting the CounterPower Supply Check HAZARDOUS VOLTAGES ARE ON THE POWER SUPPLY ASSEMBLY. ONLY SERVICE TRAINED AND QUALIFIED PERSONNEL SHOULD PERFORM THE FOLLOWING PROCEDURE 1 Remove the power cord from the back of the instrument to disconnect the Counter from the power source 2 Remove the cover as described in Chapter 3 Connect the Counter to the power source 4 Connect the negative lead of a voltmeter to the chassis and verify that the voltages in Table 2-4 match the voltages measured on connector J18 of A1 Motherboard Assembly. See Figure 2-9 for illustration of J18 viewing from the bottom of the Counter CAUTION 142 OPTIONS143 Table 2-4.A4 AC Power Supply VoltagesOverview of the Self-TestRoutines TEST LOOP: ON OFF 144 TST PRINT: ONALL DISP TEST LOOP: CPU ROM RAM EEPROM HP-IB QSPI FPGA FR END MEAS 145 INTERPKEYPAD PRINT Diagnosing the Faulty Assembly by Using the Self Tests To Run the Test-AllSelf Test 1Press and hold Recall (Utility) key, then cycle POWER key 2Press Recall (Utility) key until TEST: ALL? is displayed 3Press Enter key to start the test 146 To Run the Individual Self TestsPress Recall (Utility) key until TEST LOOP: is displayed Ensure that TEST LOOP:OFF is displayed TEST LOOP: is ON TEST LOOP to OFF Press Recall (Utility) key until TEST: ALL? is displayed Press any one of the arrow keys to select the desired self test (for example, the DISP? self test) Press Enter key to start the test Enter If you are asked to do something, press 147 8Repeat steps 2 through 5 for each of the self testsFigure 2-11A.HP 53131A/132A Self Test Troubleshooting Setup Figure 2-11B.HP 53181A Self Test Troubleshooting Setup 148 FAILTable 2-5.Troubleshooting 151 Tools Required1Turn Counter off 2Remove ac line power cord from the rear ac line socket 152 To Remove the CoverWHEN THE COVER IS REMOVED FROM THE INSTRUMENT LINE VOLTAGES ARE EXPOSED WHICH ARE DANGEROUS AND MAY CAUSE SERIOUS INJURY IF TOUCHED. DISCONNECT POWER 1Turn off the Counter and remove power cord To remove the rear bezel, loosen the captive screws on the sides as shown in Figure 3-1.Rear Bezel Removal 160 6Remove A2 Display Assembly from the front bezelNow, remove the POWER key cap by gripping and pulling it As shown in Figure 3-7, the rubber keypads (MP6) are now free Just pull them out of the bezel Remove the window (MP5), shown in Figure 3-7,by pressing down on the two top tabs and sliding the window forward 169 To Remove the Rear Terminals (Option 060)2 Unsolder the lead-endof the cables from their appropriate ground and input pads on the A1 Motherboard Assembly (J16, J17) as shown in Figure INPUTS 170 Figure 3-13.Rear Terminals (Option 060) Removal175 To Retrofit A3 1.5/3.0/5.0/12.4 GHz Channel Assembly (Option176 To Retrofit A5 DC Power Input Assembly (Option 002)Option 002 DC Power Input Assembly Parts Item Qty Preliminary Procedure 3Remove the existing A4 AC Power Supply Assembly 4Remove A1 Motherboard Assembly from chassis MP1 177 Retrofitting Procedure181 Figure 4-1D.DC Power Input Assembly Retrofitting183 To Retrofit A6 High Stability Timebase Assembly (Options 001, 010, andOption 001 Medium Stability Timebase Assembly Parts *Option 010 High Stability Timebase Assembly Parts *Option 012 Ultra-HighStability Timebase Assembly Parts 186 Option 060 Rear Terminals Parts187 rear terminals onlyfront terminals only Figure 4-3A.Plug Removal for Rear Terminals Retrofitting 2 for HP 53181A) as shown in Figure 4-3B 188 Figure 4-3B.Rear Terminals Retrofitting189 Insert the connector-endof the W1, with the washers (H6) in placeon the connector, through the appropriate rear INPUTS opening Insert and tighten the BNC nuts (H3) to secure the coaxial cables to the rear of the chassis Solder the lead-endof the cables to their appropriate ground and input pads on A1 Motherboard Assembly (J16, J17) Re-installthe cover by performing the cover removal procedure in Chapter 3 of this guide, in reverse 192 Table 5-1.Exchange Assemblies193 Reference Designations194 How To Order A PartParts Identification 195 Contacting Hewlett-PackardBy telephone: For mail correspondence, use the address below: 196 Cabinet Parts and HardwareTable 5-2.Reference Designation 197 Table 5-3.HP 53131A/132A/181A Replaceable Parts198 Table 5-3.HP 53131A/132A/181A Replaceable Parts (continued)199 Figure 5-1.HP 53131A/132A/181A Exploded View (Chassis Parts and Assemblies)200 Table 5-3.HP 53131A/132A/181A Replaceable Parts (Continued)Table 5-4.Manufacturer’s Code List 202 Table 6-1.Instrument this Guide Directly Applies To203 Backdating HardwareCHANGE 1 (Below Series Prefix 3711A) CHANGE 2 (New A3 5/12.4 GHz Prescaler Assembly) 204 CHANGE 3 (New TCXO boards)205 b.Connect the negative lead of a voltmeter to the white wireCHANGE 4 (Series 3710A to 3705A) 206 CHANGE 5 (Series 3705A to 3546A, 3548A)CHANGE 6 (Below Series Prefix 3416A) 207 CHANGE 7 (Below Serial Number 3349A01906)CHANGE 8 (Below Serial Prefix 3404A) 208 Backdating FirmwareCHANGE 1 (Firmware Revisions 3317, 3335, 3402, 3427) Replace Recall (CAL: OFFS 1 / 2 ?, GAIN 1 / 2 ?, TIMEBAS ?, and TI 1⊕2?) 209 About the HP 53131A Calibration Menu(Continued) The HP 53131A Utility/Calibration Menu Tree Utility 210 The HP 53131A Calibration ProceduresCHANGE 1 (Firmware Revisions 3317, 3335, 3402, 3427) (Continued) To access the Utility menu, power down, and press and hold the 2Press Recall (Utility) key until CAL: OFFS 1 ? is displayed 3Press Enter key CAL: OFFS 2 OFFS 2 PASS 211 4Connect the Counter, dc power supply, and multimeter as shown in FigureFigure 2-1.Gain Calibration Setup 5Adjust the power supply until the multimeter displays + 5.000 V ± 0.001 212 9Press any one of the arrow keys until CAL: GAIN 2 ? is displayed10Press Enter key 11Press Enter key again GAIN 2 PASS 12Disconnect the calibration setup 1Press any one of the arrow keys until CAL: TI ⊕ 2? is displayed 213 EquipmentHP53131APulse Generator Figure 2-3.TI Calibration Setup 4 Set the HP 8130A as follows: 214 6 Disconnect the calibration setupFigure 2-4.Standard Timebase Calibration Setup 215 (Medium or High)Allow the Counter to warm up for approximately 30 minutes before performing this calibration 2Press any one of the arrow keys until CAL: TIMEBAS? is displayed 4Press Enter key after each instruction 216 Backdating SpecificationsCHANGE 1 (53131A, Serial Prefix 3710A and Below) CHANGE 2 (53132A, Serial Prefix 3546A and Below) 217 CHANGE 3 (53181A, Serial Prefix 3711A02841 and Below)221 Instrument Inputs (Continued)222 Time Base223 Measurement Specifications224 Measurement Specifications (Continued)226 Frequency Measurement Example:230 Measurement Definitions231 Measurement Definitions (Continued)Measurement Definitions (Continued) 232 Measurement Arming and Processing233 Measurement Arming and Processing (Continued)Measurement Arming and Processing (Continued) 234 General Information247 Index
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