Page 1 Agilent Technologies. We have made no changes to this manual copy. The HP XXXX referred to in this document is now the Agilent XXXX. For example, model number HP8648A is now model number Agilent 8648A.
Page 2 Service Guide 8753E Network Analyzer H E W L E T T PACKARD...
Page 3 HP part number: 08753-90374 Supersedes October 1998 Printed in USA February 1999 Notice. The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
Page 4 The Quick Reference Guide provides a summary of selected user features. The HP-IB Programm iug and Command Reference Guide provides programming information for operation of the network analyzer under HP-IB control.
Page 5 The BP BASIC Programming Examples Guide provides a tutorial introduction using BASIC programming examples to demonstrate the remote operation of the network analyzer. The System Veracation and Test Guide provides the system verification and performance tests and the Performance Test Record for your analyzer.
Page 6: Table Of Contents
Performance Test Record ....System Verification Cycle and Kit Re-certification ..HP 8753E System Verification ....
Page 7 In Case of DifficuIty ..... 2-17 1. Test Port Output Frequency Range and Accuracy ..2-18 2-20 In Case of Difficuhy .
Page 8 2-61 Transmission Tracking (Forward) Calibration Coefficient ..2-61 Reflection Tracking (Forward) Calibration Coefficient ..2-61 Load Match (Reverse) Calibration Coefficient ..Transmission Tracking (Reverse) Calibration Coefficient 2-62 .
Page 9 For Analyzers with a Frequency Range of 30 kHz to 6 GHz ..Adjustments and Cmmction Constants Post-Repair Procedures for HP 8753E ....Source Default Correction Constants (Test 44) ..
Page 10 Cavity Oscillator Frequency Correction Constants (Test 54) ..3-28 ... . . Spur Search Procedure with a Filter 3-30 Spurs Search Procedure without a Filter ... 3-31 Serial Number Correction Constants (Test 55) .
Page 11 Step 3. HP-IB Systems Check ....If Using a Plotter or Printer ....
Page 12 If the Fault Is Intermittent ... 6-19 Repeat Test Function ... . . 6-19 HP-IB Failures ....
Page 13 7. Source Troubleshooting Assembly Replacement Sequence ....Before You Start Troubleshooting ....Power.
Page 14 7-36 Phase Lock Check with PLL DIAG ... . . 7-36 Phase Lock Check by Signal Examination ..7-38 Source Group Troubleshooting Appendix ... . 7-38 Troubleshooting Source Problems with the Analog Bus .
Page 15 Firmware Revision Softkey ....HP-IB Service Mnemonic Deiinitions ....
Page 16 12. Theory of Operation 12-1 How the HP 8753E Works ....12-2 ....
Page 17 12-10 12-10 Main CPU ......12-11 12-11 EEPROM ......12-11 .
Page 18 13. Replaceable parts Replacing an Assembly ..... 13-2 Rebuilt-Exchange Assemblies ....13-3 .
Page 19 ......14-8 Removal ......14-8 Replacement Front Panel Keyboard and Interface Assemblies (Al, A2) .
Page 20 ......Replacement Post-Repair Procedures for HP 8753E ....1462 Contents-l 5...
Page 21 15. Safety and Licensing ......Notice 15-1 15-1 Certification ......15-2 warranty .
Page 22 2-25. Test Port Crosstalk Test Setup ....2-26. HP 8753E Bottom View ....
Page 23 246. Test Port Output Harmonics Test Setup ... . 2-109 3-2. RF Output Correction Constants T&t’S&up’fdr ‘the HP 8753E : : 3-14 3-3. First Connections for Insertion Loss Measurement ..
Page 24 4-19 4-9. HP 8753E Overall Block Diagram ....5-2. Location of Al5 Diagnostic LEDs ....
Page 25 7-26 7-17. 10 MHz HI OUT Waveform from A14Jl ... . 7-26 7-18. 25 MHz HI OUT Waveform from A14Jl ... . 7-19.
Page 26 11-12 11-3. Typical ESF/ESR without and with Cables ... 11-13 ..114. Typical ERF/ERR without and with Cables 11-5. Typical EXFLEXR with 10 Hz Bandwidth and with 3 kHz 11-14 Bandwidth .
Page 27 l-l. Required Tools ......l - l ....
Page 28: Service Equipment And Analyzer Options
Flat-blade screwdrivers-small, medium, and large Non-conductive and non-ferrous adjustment tool Needle-nose pliers Tweezers Antistatic work mat with wrist-strap Service Equipment and Analyzer Options...
Page 29 HP 86036B Calibration Bit Type-N, 760 HP 8602OB No substitute Verification Bit 7 mm Low Pam Filter includes 803 IdBz HP 8496A Opt. 001, Bl8 No substitute Step Attenuator A - Adjustment T - Troubleshooting Service Equipment and Analyzer Options...
Page 30 Model Equipment HP 84QlA Opt. 020 Attenuators (tied): BP 11667A Power splitter Type-N, 6OU to 76Q Adapter Adapter Adapter BNC to Alligator Clip Adapter Adapter Adapter BNC (m) to Type-N (f) Adapter HP P/N 1260-0777 Adapter HP P/N 812Ck4770 RF Cable (2 each)
Page 31 Recommended Equipment Model Antistatic wrist Btrap HP P/N 030&0080 Antistatic wrist strap cord HP P/N 03oo-o707 Earth Ground Wire BNC Alligator Clip Adapter HP P/N 81213l&IO A - A&ustment Service Equipment and Analyzer Options...
Page 32: Principles Of Microwave Connector Care
This type of information is typically located in Chapter 3 of the calibration kit manuals For additional connector care instruction, contact your local Hewlett-Packard Sales and Service Office about course numbers HP 8505OA + 24A and HP 8505OA + 24D. See the following table for quick reference tips about connector care.
Page 33 Do Not Keep connectors clean Touch mating-plane surfaces Extend sleeve or connector nut Set connectors contact-end down Use plastic end-caps during storage Do Not Use a damaged connector-ever Inspect all connectors carefully Look for metal particles, scratches, and dents Do Not Use any abrasives Get liquid into plastic support beads Use isopropyl alcohol...
Page 34: Analyzer Options Available
Analyzer Options Available Option lD5, High Stability Frequency Reference This option offers f0.05 ppm temperature stability from 0 to 60° C (referenced to 25O C). Option 002, Harmonic Mode This option provides measurement of second or third harmonics of the test device’s fundamental output signal.
Page 35: Option 075,750 Impedance
Option 075, 7563 Impedance This option offers 75 ohm impedance bridges with type-N test port connectors. Option lDT, Delete Display This option removes the built-in flat panel display, allowing measurement results to be viewed with an external VGA monitor only. Option EM, Rack Mount Flange Kit Without Handles This option is a rack mount kit containing a pair of flanges and the necessary hardware to mount the instrument, with handles detached, in an equipment...
Page 36: Service And Support Options
The following service and support options are also available. Contact your local sales or service office. Option W32 This option provides three years of return to HP calibration service. Option W34 This option provides three years of return to HP Standards Compliant Calibration.
Page 37: System Veriikation And Performance 'Lksts
The performance of the HP 8753E network analyzer is specified in two ways: Specifies warranted performance of the wu?asurm system when making error-corrected S-parameter measurements. The measurement system includes the analyzer, test cables, and calibration kit. The System Verification Procedure is used to conti performance of the measurement system to the System Specilications.
Page 38 Instrument Specifications Instrument specifications comprise the following sections and tables in Chapter 7, “Specifications and Measurement Uncertainties, n of the HP 8753E User’s Guide: with 7-mm ‘l&t Ports” with 7-mm Test Ports” These specifications apply when the analyzer is used to make measurements...
Page 39: How To Confirm Performance To System Specifications
For example, the HP 85031B is a 7-mm calibration kit, but the HP 85029B is a 7-mm verification kit. Performance Wsts Performance tests are used to confirm analyzer performance against the Instrument SpeciEcations. If conErmation is successful, the analyzer meets the Instrument SpeciEcations as deEned above.
Page 40: Certificate Of Calibration
Certificate of Calibration Hewlett-Packard will issue a Certificate of Calibration for the product upon successful completion of System VeriEcation or completion of the Performance Tests. The Certificate of Calibration will include a S@~T?Z if the System Verification Procedure is used to confirm the System SpeciEcations. If the Performance Tests are used to conErm Instrument Specifications, the and measurement standards used for the tests must be certiEed and must be traceable to recognized standards.
Page 41: Sections In This Chapter
Sections in This Chapter System Verification Performance lksts 1. Test Port Output F’requency Range and Accuracy 2. External Source Mode kequency Range 3. Test Port Output Power Accuracy 4. Test Port Output Power Range and Linearity Minimum R Channel Level 6.
Page 42: Performance Test Record
Performance ‘I&t Record Find and use the appropriate “Performance ‘I&t Record” in the following subchapters: Performance Test Record for 30 kHz to 3 GHz Performance Test Record for 30 kHz to 6 GHz System Verification and Performance Tests...
Page 43: System Verification Cycle And Kit Re-Certification
(m) to APC-7 adapters are used. Check to see how the veriEcation kit floppy disk is labeled: If your veriEcation disk is labeled HP 8753D Verification Data Disk, or HP 8753D& HP 8753EVerificationDataDisk, you may proceed with the system verification.
Page 44: Hp 8753E System Verification
Test Port Extension Cable Set, 7-mm ....... . HP 11857D...
Page 45: Initiaiization
Initialization 1. Clear all internal memory. Caution This will erase all instrument states that may be stored in internal memory. Perform the following steps to save any instrument states that are stored in internal memory to a floppy disk. d. If the instrument state file was not saved to disk with the same name that it had while in internal memory, you may wish to rename the tie.
Page 46 Connect the equipment as shown in Figure 2-l. Let the analyzer warm up for one hour H P 8753E N E T W O R K A N A L Y Z E R Figure 2-1. System Verification ‘l&t Setup Reference”...
Page 47: Measurement Calibration
8. If you have difficulty with the printer: If the interface on your printer is HP-IB, verify that the printer address is set to 1 (or change the setting in the analyzer to match the printer). If the interface on your printer is serial or parallel, be sure that you...
Page 48 H P 8753E N E T W O R K A N A L Y Z E R REFERENCE TEST P O R T 2 PORT 1 Figure 2-2. Connections for Measurement Calibration Standards 16. When the analyzer finishes measuring the standard, connect the “short” end of the open/short combination to reference test port 1.
Page 49 The analyzer briefly displays COMPUTING CAL COEFFICIENTS. 27. Connect the test port cables as shown Figure 2-3. H P 8753E N E T W O R K A N A L Y Z E R PORT 1 H P 11857D E X T E N S I O N C A B L E S E T Figure 2-3.
Page 50: Device Verification
PASS/FAIL information for the S-parameter measurements that are valid for system verification. HP R753F N E T W O R K A N A L Y Z E R Figure 2-4. Connections for the 20 dB Verification Device 35.
Page 51 H P 8753E N E T W O R K A N A L Y Z E R Figure 2-5. Connections for the 50 dB Verifkation Device 37. When all measurements are complete, replace the verification device with the verification mismatch, as shown in Figure 2-6. Be sure that you connect Port A of the verification mismatch to reference test port 1.
Page 52 H P 8753E N E T W O R K A N A L Y Z E R P O R T 2 P O R T 1 VERIFICATION MISMATCH Figure 2-7. Mismatch Device Verification Setup 2 . . . _ . . . - --.. - .._.._..- 41.
Page 53 In Case of Difiblty 1. Inspect alI connections. Caution Doing so WILL lNkYLU?B the calibration that you have done earlier. front panel knob, highlight the,,title of the full 2-Port calibration that you have done earlier, then press ~~~~~~~~. Repeat the “Device Verification” procedure. If the analyzer still fails the test, check the measurement calibration as follows: a.
Page 54: Test Port Output Frequency Range And Accuracy
Cable, 500 Type-N, 24-inch ........HP...
Page 55 1. Connect the equipment as shown in Figure 2-8. H P 8753E N E T W O R K A N A L Y Z E R W I T H O P T I O N 0 7 5...
Page 56 In Case of Difljiculty 1. If any measured frequency is close to the specification limits, check the time base accuracy of the counter used. 2. If the analyzer fails by a significant margin at all frequencies (especially if the deviation increases with frequency), the master time base probably needs adjustment.
Page 57: External Source Mode Frequency Range
Cable, APC-7, 24-inch ........HP P/N 8120-4779 Adapter, APC-3.5 (f) to APC-7 ....... HP P/N 1250-1747 Adapter, APC-3.5 (m) to APC-7 .
Page 58 H P 83620A S Y N T H E S I Z E R T O WC-7 CABLE APCG7 24 INCH Figure 2-9. Exterml Source Mode Frequency Range lkst Setup Check to see if the analyzer is phase locking to the external CW signal: the “Performance Test Record”...
Page 59 In Case of Difkulty If the analyzer displayed any phase lock error messages: 1. Be sure the external source power is set within 0 to -25 dBm. 2. Make sure the analyzer’s “Ext Source Auto” feature is selected. In addition, verify that the analyzer is set to measure its input channel R.
Page 61 Zero and calibrate the power meter. For more information of how to perform this task, refer to the power meter operating manual. Connect the equipment as shown in Figure 2-10. H P 8753E N E T W O R K A N A L Y Z E R H P 43BA...
Page 62: Incaseofdifficulty
5. Write the power meter reading on the “Performance Test Record.” 6. Repeat steps 4 and 5 for each CW frequency listed in the “Performance Test Record.” For analyzers with Option 006, use the HP 8481A power sensor for all frequencies above 3 GHz.
Page 63 Adapter, APC-7 to Type-N (f) ........
Page 64 P O W E R S E N S O R 3 - 6GHz H P 8753E N E T W O R K A N A L Y Z E R W I T H O P T I O N 0 7 5...
Page 65: In Case Of Difficulty
4. On the HP 438A, press (REL). This sets the current power level for relative power measurement.._ ........~...~ii . : ......: : : : : /i....i ...%___.__..
Page 66 2. Verify that there is power coming out of the analyzer’s test port 1. Be sure you did not accidentally switch off theCCCCmaIyzer’s internal source. If you did so, press 1Menu) &j#j@ ~~~~~~~.~~ ‘$Ep :. 3. Repeat this performance test. Performance Tests...
Page 67 Cable, 508 Type-N, 24-inch ........HP...
Page 68 H P 8753E H P 8753E N E T W O R K A N A L Y Z E R N E T W O R K A N A L Y Z E R , ‘I R C H A N N E L...
Page 69: In Case Of Difficulty
In Case of DilEculty 1. Check the flexible RF cable (W8, as shown in Figure 2-13) between the R sampler assembly (A4) and the All phase lock assembly. Make sure it is connected between AllJl (PL IF IN) and 1st IF Out. Caution push cable W8 down next to the All phase lock assembly.
Page 70 Figure 2-13. Flexible RF Cable Location System Verification and Performance Tests...
Page 71 2. Using an ohmmeter, verify that the RF cable is not open. In addition, examine both the cable connectors-measure the resistance between the cable center pin and the cable connector and make sure it is close to zero. 3. Check the R sampler by substituting it with the B sampler (A6). a.
Page 72 H P 8753E N E T W O R K A N A L Y Z E R Figure 2-15. Setup for Checking the B Sampler (A4) 5. Repeat the test, but select the B sampler (A6) by pressing m...
Page 73 Calibration Kit, Type-N ........
Page 74: Port 1 Noise Floor Level From 300 Khz To 3 Ghz (If Bw = 3 Khz)
Port 1 Noise Floor Level from 300 kHz to 3 GHz 1. Connect the equipment as shown in F’igure 2-16. H P 8753E N E T W O R K A N A L Y Z E R Figure 2-16. Source Input Noise Floor ‘l&t Setup When the analyzer finishes the sweep, notice the mean value (which appears on the analyzer display).
Page 75: Port 1 Noise Floor Level From 300 Khz To 3 Ghz (If Bw = 10 Hz)
Port 1 Noise Floor Level from 300 kHz to 3 GHz (IF BW = 10 Hz) 10. When the analyzer finishes the sweep, notice the mean value. 11. Convert the measured linear magnitude mean value to log magnitude, using this equation. Power (dBm) = 20 * magnitude mean value)] 12.
Page 76: Port 2 Noise Floor Level From 3 Ghz To 6 Ghz (If Bw = 3 Khz)
Port 2 Noise Floor Level from 300 kHz to 3 GHz When the analyzer tlnishes the sweep, notice the mean value. 21. Convert the measured linear magnitude mean value to log magnitude, using this equation. = 20 * [log&inear Power (dBm) magnitude mean v&e)] 22.
Page 77: Port 2 Noise Floor Level From 3 Ghz To 6 Ghz (If Bw = 10 Hz)
Port 2 Noise Floor Level from 3 GHz to 6 GHz (IF BW = 10 Hz) ....--..- i . ..ii 31. When the analyzer hnishes the sweep, notice the mean value. 32.
Page 78 1. Perform the “ADC Linearity Correction Constants (Test 52),’ located in Chapter 3, “Adjustments and Correction Constants n 2. Repeat the “Test Port Input Noise Floor Level” procedure. 3. Suspect the A10 Digital IF assembly if the analyzer fails both test port input noise floor tests.
Page 79: Test Port Input Frequency Response
Adapter, APC-7 to Type-N (f) ........
Page 80: Power Meter Calibration For Test Port 1 From 300 Khz To 3 Ghz
Power Meter Calibration for Test Port 1 from 300 KHz to 3 GHz 1. Zero and calibrate the power meter. 2. Connect the equipment as shown in Figure 2-17. H P 8753E N E T W O R K A N A L Y Z E R H P 8753E...
Page 81 7. Press ~~~~~~:,~:-g #T&j%!&. The default power meter HP-IB address is 13. Make sure it is the same as your power meter HP-IB address. Otherwise, use the analyzer front panel keypad to enter the correct HP-IB address for your power meter.
Page 84: Power Meter Calibration On Port 2 From 300 Khz To 3 Ghz
Power Meter Calibration on Port 2 from 300 kHz to 3 GHz 22. Connect the equipment as shown Figure 2-19. H P 8753E N E T W O R K A N A L Y Z E R H P 8482A...
Page 85: Test Port 1 Input Frequency Response From 300 Khz To 3 Ghz
Option 006. Otherwise continue with the next sections Power Meter Calibration for Test Port 2 from 3 GHz to 6 GHz 31. Replace the power sensor with the HP 8481A, and then setup the power meter: If the power meter is an HP 438A, press a.
Page 86 N E T W O R K A N A L Y Z E R W I T H O P T I O N 0 7 5 H P 438A 35. Press ~~~~~~~~~~~~~~ ~~~-:~~~~~~~~~~~~~~~: Repeat step 12 to build a calibration factor sensor table for the HP 8481A power sensor. Performance Tests...
Page 87: Test Port 1 Input Frequency Response From 3 Ghz To 6 Ghz
39. When the analyzer Gnashes the calibration sweep, connect the equipment as shown in Figure 2-22. H P 8753E N E T W O R K A N A L Y Z E R P O R T 1 P O R T 2...
Page 89: Test Port 2 Input Frequency Response From 3 Ghz To 6 Ghz
47. When the analyzer displays the message POWER METER CALIBRATION SWEEP DONE, connect the equipment as shown as in Figure 2-24. H P 8753E N E T W O R K A N A L Y Z E R P O R T 1...
Page 90 Calibration Kit, 75 ohm, Type-N ........
Page 91: Crosstalk To Test Port 1 From 300 Khz To 3 Ghz
Press (jj) [iZG) P#%B @J (XJ 3. Press m ~~~~ @J (xl). Crosstalk to Test Port 2 from 300 kHz to 3 GHz 4. Press~(3iZJ(i$J&Tj@LG/n)..< s . ; ..~ ; ..~ ..~ ...._ ......: ..~. . . i ..~ / - ..i . : : . . : . . : : : : .A..~ ~ . . . ~ . ~ . ~ . ~ . ~ . ~ . ~ . ~ . .
Page 92: Crosstalk To Test Port 2 From 3 Ghz To 6 Ghz
18. Write the marker value (which appears on the analyzer display) in the “Performance Test Record. n Crosstalk to Test Port 2 from 3 GHz to 6 GHz .._. _ ._ _ i ..
Page 93 Figure 2-26. HP 8753E Bottom View System Verification and 2-57 Performance Tests...
Page 94: Calibration Coefficients
Cable, Type-N, 24-inch ........
Page 95: First Fuli 2-Port Calibration
1. Connect the equipment as shown in Figure 2-27. H P 8753E N E T W O R K A N A L Y Z E R TEST PORT 1 Figure 2-27. First Full 2-Port Calibration ‘I&t Setup 2. PressLPreset)Lstart)@&EJ 5.
Page 96 Waitforthemessage COMPUTINGCAL COEFFICIENTS to disappearfromthe analyzer display before proceeding to the next step. 18. Connect the equipment as shown in Figure 2-28. H P 8753E N E T W O R K A N A L Y Z E R PORT 1 PORT 2 Figure 2-28.
Page 97: Directivity (Forward) Calibration Coefficient
...., , .., , ..a . , . J ..
Page 99 44. Replace the open/short combination with the 50 ohm termination (supplied in the calibration kit). 46. Connect the “open” end of the open/short combination to the analyzer test port 2. 48. Connect the “short” end of the open/short combination to the analyzer test port 2.
Page 101: System Trace Noise (Only For Analyzers Without Option 006)
Cable, 75Q, Type-N 24-inch ........
Page 102: System Trace Noise For A/R Magnitude
instrument’s statistic feature. 7. When the analyzer displays the “Hld” annotation, press c-j ....8. Write the sdev (standard deviation) value, which appears on the analyzer display, on the “Performance Test Record.
Page 103: System Trace Noise For B/R Phase
19. When the analyzer Finishes the number of sweeps, press @iiGXZ) 20. Write the sdev value on the “Performance Test Record.” 1. Perform the “ADC Offset Correction Constants” procedure, located Chapter 3, “Adjustments and Correction Constants. n 2. Repeat this performance test. 3.
Page 104: System Trace Noise (Only For Analyzers With Option 006)
Cable, APC-7, 24-inch ........
Page 105: System Trace Noise For A/R Magnitude From 30 Khz To 3 Ghz
... . i . . : .._ .._ / .._ , ..instrument’s statistic feature.
Page 106: System Trace Noise For A/R Phase From 30 Khz To 3 Ghz
16. When the analyzer finishes the number of sweeps, press (Scale) 17. Write the s.dev value, which appears on the analyzer display, on the “Performance Test Record. ’ 18. Press m ~~~.~~~~~~~~~~~~~~~:~~. (Menu) :~~~~~~~~ ..> > > > > > ..19.
Page 107: System Trace Noise For B/R Phase From 30 Khz To 3 Ghz
28. When the analyzer finishes the number of sweeps, press [-Ref) 29. Write the sdev value, which appears on the analyzer display, on the “Performance Test Record. n 1. Perform the “ADC Offset Correction Constants” procedure, located in Chapter 3, “Adjustments and Correction Constants.” 2.
Page 108: 12. Test Port Input Impedance
Cable, 750, Type-N, 24-inch ........
Page 109 1. Connect the equipment as shown in Figure 2-33. H P 8753E N E T W O R K A N A L Y Z E R REFERENCE TEST --) PORT I 2-33. Sll l-Port Chl lkst Setup Figure 3. Press m (3iZJ Lk/ml.
Page 110 12. When the analyzer displays 'DONE' IF FINISHED WITH CAL, press 14. Connect the equipment as shown in Figure 2-34. PORT 1 PORT 2 15. Press e to turn the analyzer’s marker 1 on. Use the front panel knob to locate the maximum value of the data trace for each of the frequency ranges listed in the “Performance Test Record.”...
Page 111 H P 8753E N E T W O R K A N A L Y Z E R PORT 1 PORT 2 CABLE 24 INCH REFERENCE TEST --c PORT 2 Figure 2-35. $22 l-Port Cd ‘l&t Setup 19. At the prompt, connect an open to reference test port 2, as shown in Figure 2-35.
Page 112: In Case Of Difficulty
PORT 1 PORT 2 CABLE 24 INCH Figure 2-36. Port 1 Input Impedance ‘I&t Setup 28. Press m to activate the analyzer’s marker 1. Use the front panel knob to locate the maximum value of the data trace for each of the frequency ranges listed in the “Performance Test Record.
Page 113 Power Sensor ............HP 8482A Step Attenuator, 110 dB ......HP 8496A Option 001, H18 (See notes on the following page.)
Page 114 The HP 8496A step attenuator (Option 001, H18) comes with a special calibration that supports the measurement uncertainties expressed in the test record for this performance test. The special calibration consists of two measurements The hrst is a measurement of the attenuation at each step. The data...
Page 115: Initial Calcuiations
Table 2-l by referring to the calibration data for the HP 8496A step-attenuator. Refer to the note on the previous page. a. Find the column in the HP 8496A attenuation error table that pertains to the attenuation errors for 30 MHz.
Page 116: Power Meter Calibration
Calculate the attenuation error values for this column by subtracting the 4. The values in column “F” result from correcting the expected measurement value by the amount of attenuator error. Calculate the values in this column by subtracting the values in column “D” from the values in column “E”...
Page 117 H P 8753E NETWORK ANALYZER WITH OPTION 075 H P 5753E POWER METER 1 1 0 dB STEP ATTENUATOR POWER SENSOR Figure 2-37. Power Meter Calibration for Magnitude Dynamic Accuracy System Verification and Performance Tests...
Page 118 8. Set the HP 8496A to 10 dB. 9. Set the following analyzer parameters: 10. Set up the HP 8753E for power meter calibration: a. Select the HP 8753E as the system controller: (Local.. _ b. Set the power meter’s address: .
Page 119: Adapter Removal Calibration
13. Connect the equipment as shown in the Figure 2-38: H P 8753E NETWORK ANALYZER PORT I I TYPE-N 24 INCH ADAPTER TYPE-N ( f ) TO TYPE-N (f) H P 8753E NETWORK ANALYZER 24 INCH 24 INCH ADAPTER TYPE-N (f)
Page 120 14. Perform a full 2-port error correction with isolation. When you are performing error-correction for a system that has type-N test port connectors, the softkey menus label the sex of the test port connector-not t$ @bration standard connector. be connected to the female test port. 15.
Page 121: Measure Test Port 2 Magnitude Dynamic Accuracy
25. Remove the type-N (f) to (f) adapter and connect the equipment as shown in Figure 2-39. Con&m that the step attenuator is set to 10 dB. H P B753E NETWORK ANALYZER W I T H O P T I O N 0 7 5 PORT 11 1 1 0 dB S T E P A T T E N U A T O R...
Page 122 26. To set up the dynamic accuracy measurement, press the following: 28. Set the step attenuator to 0 dB. 30. Write the mean value (which appears on the analyzer’s display) in the “Test Port Measurement” cohunn of the “Performance Test Record.” This column is also labeled “G.”...
Page 123: Measure Test Port 1 Magnitude Dynamic Accuracy
33. Set the step attenuator to 10 dB. 34. To set up the dynamic accuracy measurement, press the following: ..../ i . . . ~ . ~ . i i ~ ~ . . . ~ . ~ . ~ . . _ _i..::::..~~: ....../... / . ~ . z u~ i..LSS. . 36.
Page 124 3. If the analyzer fails either test port 2 or test port 1 dynamic accuracy at lower power levels: a. Perform the “IF Amplifier Correction Constants” and “ADC Offset Correction Constants” procedures (located in Chapter 3, “Adjustments and Correction Constants”). b.
Page 125 Cable, 750, Type-N, 24-inch ........
Page 127: Test Port 2 Magnitude Compression
..~ ..~ ..A . . > . a >: ....A . . s ..i.>>>>. 17.
Page 128: 15. Test Port Receiver Phase Compression
Cable, APC-7, 24-inch ........
Page 129: Test Port 2 Phase Compression
1. Connect the equipment as shown in Figure 2-41. H P 8753E N E T W O R K A N A L Y Z E R 2-41. ‘Ikst Port Phase Compression ‘&St SetUP Figure 11. Write the absolute value of the marker 2 reading in the “Measured Value”...
Page 130 ..........s. , ..X ../ /_. i ... , ..~ . ~ ~~ . . _ ...._ _.._ , ... Value”...
Page 131 Cable, APC-7, 24-inch ........HP P/N 8120-4779 Attenuator (2), 20 dB, APC-7 ......HP 8492A Option 020 Equipment Required for 75 ohm Analyzers Minimum Loss Pad (2) .
Page 132 Press m ~~~~~~ [lol @ to set the IF bandwidth to 10 Hz. Connect the equipment as shown in Figure 2-42. H P 8753E H P i3753E N E T W O R K A N A L Y Z E R...
Page 133: Test Port Output Worst Case 3Rd Harmonic
10. Write the marker 1 value (which appears on the analyzer display) on the “Performance Test Record. n This is the worst case test port output 2nd harmonic 11. Press @ 0 @JJ to change the stop frequency to 1 GHz. trace.
Page 135: Port2Inputworstcase2Ndharmonic
Port 1 Input Worst Case 3rd Harmonic 29. Press m @ m to change the stop frequency for measuring the receiver Write the marker 1 value on the “Performance Test Record.” ..p ( , Z . . . : . : , : . : . : : . : _ ...., . . , . , . , ; _. . . ;; ..
Page 136: Port 2 Input Worst Case 3Rd Harmonic
Port 2 Input Worst Case 3rd Harmonic 45. Press Lstoe) (iJ LG/n to change the stop frequency for measuring the receiver ..: ...._ .
Page 137 Cable, APC-7, 24-inch ......, ..
Page 138: Test Port Output Worst Case 2Nd Harmonic
2. Press m (16) a @ @ Cc/n to set the frequency range. 4. Connect the equipment as shown in Figure 2-44. H P 8753E N E T W O R K A N A L Y Z E R...
Page 139: Test Port Output Worst Case 3Rd Harmonic
11. Press @ 0 m to change the stop frequency to 2 GHz. Press (3-j ~~~~~~‘~.~~ ~~~~~~~:~~~ - ....... . _i -/ . i ....../a ..; ....i ..V . G % ..~ ....: : z ......: . A ../. : . trace.
Page 140: Port 1 Input Worst Case 2Ndharmonic
19. Connect the equipment as shown in Figure 2-45. H P 8753E N E T W O R K A N A L Y Z E R PORT 1 PORT 2 I CABLE APC-7 22. Press m (16) m m @ Lc/n to set the frequency range.
Page 141: Port2Inputworstcase2Ndharmonic
36. Write the marker 1 value on the “Performance Test Record.” 44. Write the marker 1 value (which appears on the analyzer display) on the “Performance Test Record.” This is the worst case port 2 input (receiver channel B) 2nd harmonic System Verification and Performance Tests...
Page 142: Port2Inputworstcase3Rdharmonic
Press . . . J < +: . . < <: z : . : . ‘ . ‘ . x F Y ..... . . 46.
Page 143 Adapter, APC-7 to type-N (f) ........HP 11524A Adapter, type-N (m) to BNC (f) .......HP P/N 1250-1476 Cable, 503, BNC (m) .
Page 144: Procedure
1. Calibrate the spectru?n analg~: a. Connect the BNC cable between the spectrum analyzer CAL OUT connector and the 508 input. Use the type-N (m) to BNC (f) adapter at the input. b. FVess m). f. Remove the BNC cable and adapter. 2.
Page 145 H P 8753E NETWORK ANALYZER SPECTRUM ANALYZER PORT 1 A D A P T E R CABLE H P 8753E NETWORK ANALYZER W I T H O P T I O N S 0 7 5 *DIRECT CONNECTION Figure Z-46. ‘lkst Port Output Harmonics Ttkst Setup...
Page 146 Set up the display: spectrum anulgzer a. Press m. b. Press L2o)m. c. Press (E&J d. Press (3ooJ m. e. press ~~#~~~~~~~~:. f. Press @ @%Q. g. Press QiiKiFS]. h. Press .~~~~~~~. i. Press (iZJ @KY). and spectrum analyzer to the harmonic frequency. Set the network anulgzer Use the appropriate test record to choose the proper harmonic frequency.
Page 147 6. Set up the network ..a. Press ~$Bj$gi$. b. Enter the fundamental frequency. For example, press lso) m to enter the hrst fundamental frequency in the 3 GHz test record. 7. Measure and record the power in the second or third harmonic by taking a single sweep with the spectrum aruzlgzer: a.
Page 148 Performance Xkst Record For Analyzers with a Frequency Range of 30 liEIz to 3 GHz See the next “Performance Test Record” section if your analyzer frequency range is from 30 kHz to 6 GHz (Option 006). Performance Test Record...
Page 149 HP 8753E Performance Test Record (1 of 13) Calibration Lab Address: Report Number Date Last Calibration Date Customer’s Name Performed by Model HP 8753E Serial No. Option(s) Ambient Temperature Description Model Number Trace Number CM Due Date Frequency Counter Power Meter...
Page 150 HP 8753E Performance ‘l&t Record (2 of 13) For 30 kEIz-3 GHz Analyzers Report Number Results Measured Uncertainty 0.03 0.029999 7 0.030 000 3 fO.OOO 000 050 0.299 997 0.300003 4.999 950 5.000 050 l 0. 0 00 028 16.0 15.999 840...
Page 151 For 30 kHz-3 GHz Analyzers Model HP 87683 Measured Measurement Uncertainty Power Center Frequency 20 MHz 200 MHZ 500 MHz Power Level Measured Uncertainty Linearity l 0.03 l 0.02 Test Record...
Page 152 HP 8753E Performance ‘I&t Record (4 of 13) For 30 kHz-3 GHZ Analyzers Hewlett-Packard Company Report Number Specification Measnrement Test settings Power Level Linearity Uncertainty + 10 Frequency = 3 GHz l 0.03 + 10 Performance Test Record 2a-5...
Page 153 HP 8753E Performance ‘l&t Record (5 of 13) For 30 kHz-3 GEz Analyzers Model HP 876QE CW Prequency Speciilcation Measurement Uncertainty < -35 300 kH2 3.29 MHz < -35 3.31 MHZ < -35 < -35 16.10 MHz 30.90 MHz < -35 31.10 MHz...
Page 154 HP 8753E Performance Test Record (6 of 13) For 30 kEiz-3 GHz Analyzers Hewlett-Packard Company Model HP 8763E Measurement Measured Value Uncertainty Port 2 0.47 Port 1 0.47 Test settings Uncertainty < -100 < -100 Performance Test Record 2a-7...
Page 155 HP 8753E Performance TLkst Record (7 of 13) For 30 kHz-3 GEIz Analyzers Hewlett-Packard Compnny Model HP 8768E Serial Number Measured Value Frequency Hange Uncertainty Forward Direction 300 kHz - 1.3 GHz Directivity Directivity Forward Direction 300 kHz - 1.3 GHz Forward Dim&ion...
Page 156 HP 8753E Performance ‘Ilest Record (8 of 13) For 30 kHz-3 GEL Analyzers Hewlett-Packard Company Model HP 8766E Measured Value Measurement Uncertainty Trans. Tracking 300 kHz - 1.3 GHz Trans. Tracking Forward Direction Load Match Load Match Reverse Direction Directivity 300 kHz - 1.3 GHz...
Page 157 HP 8753E Performance ‘I&t Record (9 of 13) For 30 kHz-3 GEJz Analyzers Model HP 8762E Date CW Frequency Measured Vhhe Uncertainty < 0.03B” rrns < 0.006 dH rms < 0.038O rms Test Port Port 2 300 kHz-1.3 GHz Port 2 1.3 GHz-3 GHz...
Page 158 Record (10 of 13) For 30 kHz-3 GHz Analyzers Report Number Expected Test Port ement Measurement Input Power Attn. (corrected) 0.000 l 0.017 - 8 0 0.000 ~0.020 - 8 0 - 9 0...
Page 159 HP 8753E Performance lkst Record (11 of 13) For 30 kHz-3 GHz Analyzers Model HP 8766E Date CW Frequency Test Port Uncertainty Port 2 50 MHZ Port 2 Port 2 Port 2 Port 1 Port 1 Port 1 Port 1...
Page 160 For 30 kHz-3 GHz Analyzers Model HP 8753E Date Measurement Description Uncertainty Port 1 Input Harmouics Port 2 Input Harmouics Performance Ted Record 2a-13...
Page 161 For 30 kHz-3 GHz Analyzers Date Second Harmonic Measurement Frequency Uncertainty 50 MHz 1.0 GHz 500 MHz 2.4 GHz 1.2 GHz 3.0 GHz 1.5 GHz Third Harmonic Frequency 300 MHz 100 MHz 1.2 GHz 2.7 GHz 900 MHz 3.0 GHz Performance Test Record...
Page 162: Performance 'Lkst Record For Analyzers With A Frequency Range Of 30 Khz To 3 Ghz
Performance Xkst Record For Analyzers with a Frequency Range of 30 kHz to 6 GHz See the previous “Performance Test Record” section if your analyzer frequency range is from 30 kHz to 3 GHz. Performance Test Record...
Page 163 HP 8753E Performance ‘I&t Record (1 of 15) Calibration Lab Address: Report Number Date Last Calibration Date Customer’s Name Performed by Model HP 87533 Option 006 Serial No. Option(s) Firmware Revision Ambient Temperature Description Model Number Trace Number Cal Due Date...
Page 164 HP 8753E Performance Test Record (2 of 15) For 30 kHz-6 GEz Analyzers Model HP 87683 Option 006 Date Measurement Results Measured Uncertainty 0.03 0.029999 7 0.0300003 0.299 997 0.300 003 f 0.000 000 520 5.000 050 16.0 16.000160 31.0 30.999 690...
Page 165 HP 8753E Performance ‘l&t I&cord (3 of 15) For 30 kHz-6 GHz Analyzers Elewlett-Packard Company Model HP 8763E Option 006 Report N&r Test Frequencies (GHz) Result 0.010 0.020 0.100 1.000 2.000 3.000 4.000 5.000 Measured Value Measurement Power 300 lcl-lz...
Page 166 HP 8753E Performance ‘Ikst Record (4 of 15) For 30 kHz-6 GHz Analyzers Report Nnmber Power Level Mess. Test settings Uncert. Frequency = 300 kHz + 10 CW F'requency - 3 GHz Performance Test Record 2b-5...
Page 167 HP 8753E Performance ‘l&t Record (5 of 15) For 30 kHz-6 GEIz Analyzers Report Number Date Test Port Chzlxmt Power Ra Test settings Results Measured Power Level + 10 CW Frequency = 6 GHz + 10 Performance Test Record...
Page 168 For 30 kHz-6 GElz Analyzers Model HP 875QE Option 006 Date Minimum Test Port Power Specification Uncertainty 300 kHz < -35 3.29 < -35 3.31 MHz < -35 15.90 MHz < -35 16.10 MHz 31.10 MHz < -35 1.6069 GHz <...
Page 169 For 30 kHz-6 GHZ Analyzers Hewlett-Packard Company Model HP 8753E Option 006 Report Number Serial Number Frequency Range Uncertainty 0.47 0.47 0.17 0.17 Test settings Measurement Uncertainty < -100 < -100 < -90 Performance Test Record...
Page 170 For 30 kHz-6 GHz Analyzers Model HP 87683 Option 066 Report Number Date Test Description Frequency Range Spx. Measured Valne Uncertainty Forward Direction Directivity 300 kHz-1.3 GHz Directivity 1.3 GHz-3 GHz Directivity 3 GHz-6 GHz Forward Direction Source Match 300 kHz-1.3 GHz Source Match 1.3 GHz-3 GHz...
Page 171 HP 8753E Performance ‘Ikst Record (9 of 15) For 30 kHz-6 GHz Analyzers Hewlett-Packard Company Model HP 8766E Option 666 Report Number Serial Number Date Calibration CoeiEcients (conthned) Measured Value Measurement Uncertainty Reverse Direction Trans. Tracking 300 kHz-1.3 GHz Trans. Tracking 1.3 GHz-3 GHz...
Page 172 HP 8753E Performance ‘l&t Record (10 of 15) For 30 kHz-6 GHz Analyzers Report Number Date Specification Frequency Uncertainty A/R (Magnitude) AIR (P-1 B/R (Magnitude) B/R (Magnitude) Measurement Return Loss Uncertainty 300 kHz-1.3 GHz Port 2 1.3 GHz-3 GHz Port 2...
Page 173 HP 8753E Performance lkst Record (11 of 15) For 30 kHz-6 GHz Analyzers Model HP 8766E Option 696 Report Number Date Expected Input Power Attn. Measurement Measnrement 0.000 - 4 0 - 5 0 - 8 0 0.000 ~0.020 - 4 0...
Page 174 HP 8753E Performance ‘l&t Record (12 of 15) For 30 kHz-6 GEIz Analyzers Hewlett-Packard Company Date CW Frequency Uncertainty Port 2 Port 2 Port 2 Port 2 Port 2 Port 2 Port 1 Port 1 Port 1 Port 1 Port 1...
Page 175 HP 8753E Performance ‘l&t Record (13 of 15) For 30 kHz-6 GHz Analyzers Model HP 8755E Option 006 Report Number Serial Number Date cw Frequency Test Port Measured Vshe Specification Measurement Uncertainty Port 2 Port 2 Port 2 Port 2...
Page 176 HP 8753E Performance lkst Record (14 of 15) For 30 kHz-6 GHz Analyzers Report Number Model HP 8755E Option 666 Date Measurement Value Test Description Uncertainty Port 1 Input Harmonics Port 2 Input Harmonics Performance Test Record 2b-15...
Page 177 HP 8753E Performance ‘l&t Record (15 of 15) For 30 kHz-6 GHz Analyzers Model J3P 8755E Option 666 Report Number Date Second Harmonic Specification Measurement Value Measurement Frequency Frequency 100 MHz 50 MHz 1.0 GHz 500 MHz 2.4 GI-lz 1.2 GHz 3.2 GI-Iz...
Page 178: A9 Switch Positions
Adjustments and Correction Constants This chapter has the following adjustment procedures: Source Default Correction Constants (Test 44) Source Prettme Default Correction Constants (Test 45) RF Output Power Correction Constants (Test 47) IF Amplifier Correction Constants (Test 51) ADC Offset Correction Constants (Test 52) •...
Page 179 Post-Repair Procedures for HP 8753E ensure that the instrument is working correctly, following the replacement of an assembly. These procedures can be located in either Chapter 2 or Chapter 3. Replaced Assembly Correction Constants (Ch. 3) Al Front Panel None...
Page 180 (ch. 3) Assembly Operator’s Check Service l&t 21 Load Firmware CC Retrieval Available) Service l&t 22 Disk Option Number CC (Test 56) Test Port Output Frequency Range Not Available) Disk Option Number CC (‘Pzst 66) Source Def CC (lkst 44) Pretune Default CC (‘l&t 45) Cal Kit Default (‘kst 67) Source Pretune CC (T&t 48)
Page 181 l&placed Correction chlstants (ch. 3) Fractional-N Spur and and Accuracy FM Sideband EEPROM Hackup Disk Fractional-N Frequency Range and Accuracy Fractional-N Spur Avoidance and FM sideband EEPROM Hackup Disk None None Interface Rear Panel None Observation of Display None Observation of Display Observation of Display Processor none...
Page 182 1. Remove the power line cord from the analyzer. Set the analyzer on its side. 3. Remove the two lower-rear comer bumpers from the bottom of the instrument with the T-10 TORX screwdriver. 4. Loosen the captive screw on the bottom cover’s back edge, using a T-15 TORX screwdriver.
Page 183 Normal Mode Alter Mode Rocker Slide Figure 3-1. A9 Correction Constants Switch 8. Reconnect the power line cord and switch on the instrument. Adjustments and Correction Constants...
Page 184 Source Default Correction Constants (‘kst 44) minutes. This internal adjustment routine writes default correction constants for the source power accuracy......2. Observe the analyzer for the results of the adjustment routine: procedure. Troubleshooting. n Adjustments and Correction Constants 3-7...
Page 185 Source Pretune Default Correction Constants (X&t 45) This adjustment writes default correction constants for rudimentary phase lock pretuning accuracy. 2. Observe the analyzer for the results of this adjustment routine: If the analyzer displays Pretune Def DONE, you have completed this procedure.
Page 186 Analog Bus Correction Constants (‘I&t 46) This procedure calibrates the analog bus by using three reference voltages (ground, + 0.37 and +2.5 volts), then stores the calibration data as correction constants in EEPROMs. 2. Observe the analyzer for the results of the adjustment routine: If the analyzer displays ABUS Cor DONE, you have completed this procedure.
Page 187 Source Pretune Correction Constants (Tkst 48) This procedure generates pretune values for correct phase-locked loop operation. 2. Observe the analyzer for the results of this adjustment routine: procedure. If the analyzer displays FAIL, refer to Chapter 7, “Source Troubleshooting. n Adjustments and Correction Constants...
Page 188 Antistatic Wrist Strap Cord ........
Page 189: Power Sensor Calibration Factor Entry
Power Sensor Calibration Factor Entry 5. Press @--+q ~~~~~~~~ ~~~~~~~~~~ ~~~~~~~~~~..;~~~~3.. sensor A (HP 8482A for a 500 analyzer, or HP 8483A Option HO3 for a 75Q analyzer). 6. Zero and calibrate the power meter and power sensor. 7. Build a table of up to 55 points (55 frequencies with their calibration factors).
Page 190 ..: : . . / ..A . > . I . A . . S W ; ; . > > : .i . T a power sensor calibration table for power sensor B (HP 8481A), using the 9.
Page 191 P O R T 2 P O R T 2 Figure 3-2. RF Output Correction Constants ‘kst Setup for the HP 8753E Adjustments and Correction Constants...
Page 192 13. When the analyzer completes the test, observe the display for the results: If you see DONE, press m and you have completed this procedure. If you see FAIL, re-run this routine in the following order: a . P r e s s - ( P r e s e t ) . b.
Page 193 Antistatic Wrist Strap Cord ........
Page 194: Adc Offset Correction Constants (Test 52)
ADC Offset Correction Constants (‘I&t 52) Analyzer warmup tim.e: 30 minutes. These correction constants improve the dynamic accuracy by shifting small signals to the most linear part of the ADC quantizing curve. Note This routine takes about three minutes. 2. Observe the analyzer for the results of the adjustment routine: procedure.
Page 195: Sampler Magnitude And Phase Correction Constants (Test 53)
Antistatic Wrist Strap Cord ........
Page 196: Power Sensor Calibration Factor Entry
Power Sensor Calibration Factor Entry sensor A (HP 848219 for 5OQ analyzers, or HP 8483A Option HO3 for 75 ohm analyzers). 6. Build a table of up to 55 points (55 frequencies with their calibration factors). To enter each point, follow these steps: b.
Page 197: Determine The Insertion Loss Of The Cable At 1 Ghz
..i ..2x. . ii ~ ..~ . ~ . ~ . ~ . ~ . ~ . ~ ~ ..z ii . ~ ........_. ~. ~ . ~ : : ; ._...._ _. . . : a power sensor calibration table for power sensor B (HP 8481A), using the Determine the Insertion Loss of the Cable at 1 GHz 9.
Page 199 P O R T 2 P O R T 1 P O R T 2 Figure 3-5. Connections for Sampler Correction Routine Adjustments and Correction Constants...
Page 200: Sampler Correction Constants Routine
If the analyzer displays Sampler Cor - FAIL, check the following: a. The HP-IB address of your power meter is set at 13. Then rerun this routine (“Sampler Correction Constants Routine”). b. The HP 8482A power sensor is connected to Port 1. Rerun this routine (‘Sampler Correction Constants Routine “).
Page 201 3 - 6GHr ( O P T I O N H03) Figure 3-7. Connections for Sampler Correction at Port 2 Adjustments and Correction Constants...
Page 202 For Option 606 Instruments Only: When the analyzer displays CONNECT 6 2 for 6 GHz Figure 3-8. Connections for Sampler Correction at Port When the analyzer displays CONNECT PORT 1 TO PORT 2, make the connections of the second through cable (of which you have determined its insertion loss) as shown in F’igure 3-9.
Page 203 25. Enter the insertion loss of the through cable (determined in step 15) and press :~~~~~~. For example, if the insertion loss of the through cable at ....i . . : : : . ~ ..~ ..~ . . . ~ i . . . ~ ; ; ..~ . . 1 GHz is found to be 0.25 dB, then press 1.25) @.
Page 204 f. Repeat the “Sampler Correction Constants Routine” starting at step 16. If the analyzer continues to fail this adjustment routine, refer to Chapter 7, “Source Troubleshooting. n ....; a : . . ; ..i ......~ ..~ ... . ~ ..~ ..~ ..- - . ~ ~ - .._ s . e.
Page 205: Cavity Oscillator Frequency Correction Constants (Test 54)
Adapter APC-7 to 3.5 mm (m) ....... .HP P/N 1250-1746...
Page 206 Perform the first five steps of the procedure at least once for familiarization before trying to select the target spur (especially if you are not using a filter). 1. Connect the equipment shown in Figure 3-10. Figure 3-10. Setup for Cavity Oscillator Frequency Correction Constant Routine During this adjustment routine, you will see several softkeys: sweeps the current frequency span;...
Page 207: Spur Search Procedure With A Filter
span overlaps the previous span by 3 MHz (the center frequency increases by 2 MHz; the span is 5 MHz). Therefore, anything visible on the right half of the screen of one set of sweeps will appear on the left half or center of the screen when you press :#XEg.
Page 208: Spurs Search Procedure Without A Filter
7. Observe the analyzer for the results of this adjustment routine: procedure. Troubleshooting. n Spurs Search Procedure without a Filter . ../.. : : . . + . . . < <..d <.., . observe and mark the target spur 9.
Page 209 On occasion the largest spur appears as one of a group of five evenly spaced spurs as shown in F’igure 3-13. The target spur is again the fourth from the left (not the fifth, right-most spur). Figure 3-13. ‘Ihrget Spur Is Fourth in Display of Five spurs Figure 3-14 shows another variation of the basic four spur pattern: some up, some down, and the target spur itself almost indistinguishable.
Page 210 2 983.000 000 MHz Figure 3-14. ‘Ihrget Spur Is Almost Invisible 10. Rotate the front panel knob to position the marker on the target spur. Then press &@&&E@ and observe the analyzer for the results of the adjustment routine: procedure. Troubleshooting.
Page 211: Serial Number Correction Constants (Test 55)
Perform this procedure ON= if the A9 CPU assembly has been replaced. Record the ten character serial number that is on the HP 8753E rear panel identification label. Enter the serial number with an external keyboard or by rotating the front panel knob to position the arrow below each character of the instrument a total of ten characters: four digits, one letter, and five 9nal digits.
Page 212 Check the serial number recognized by the analyzer: b. Look for the serial number displayed on the analyzer screen. c. Rerun this adjustment test. If the analyzer continues to fail this adjustment routine, contact your nearest HP sales or service office. Adjustments and Correction Constants...
Page 213: Option Numbers Correction Constants (Test 56)
3 and make sure it is correct. Pay special attention to the letters “I” or “O”, the numbers “1” or “0” (zero). Repeat this entire adjustment test. If the analyzer continues to fail the adjustment routine, contact your nearest HP sales or service office. 3-36 Adjustments and Correction Constants...
Page 214: Initialize Eeproms (Test 58)
Initialize EEPROMs (T&t 58) This service internal test performs the following functions: Initializes certain EEPROM address locations to zeroes. Note This routine till alter the serial number or Options 002, 006 and 010 correction constants. Make sure the A9 switch is in the alter position. Restore the analyzer correction constants in the EEPROMs: If you have the correction constants backed up on a disk, perform these steps:...
Page 215: Eeprom Backup Disk Procedure
Antistatic Wrist Strap Cord ........
Page 216 5. Write the following information on the disk label: analyzer serial number today’s date “EEPROM Backup Disk” Adjustments and Correction Constants 3-38...
Page 217: Correction Constants Retrieval Procedure
Antistatic Wrist Strap Cord ........
Page 218: Loadingfirmware
Loading Firmware Required Equipment and ‘lbols Firmware disk for the HP 8753E The following procedures will load firmware for new or existing CPU boards in an HP 8753E network analyzer. Loading Firmware into an Existing CPU Use this procedure for upgrading firmware in an operational instrument whose CPU board has not been changed.
Page 219 If the following LED pattern is present, the firmware disk is not for use with your instrument model. Check that the firmware disk used was for the HP 8753E. the firmware disk may be If any of the following LED patterns are present, defective.
Page 220: Loadingfirmwareintoanewcpu
Loading Firmware into a New CPU Use this procedure to load firmware for an instrument whose CPU board has been replaced. 1. Turn off the network analyzer. 2. Insert the firmware disk into the instrument’s disk drive. 3. Turn the instrument on. The firmware wilI be loaded automatically during power-on.
Page 221 If any of the following LED patterns are present, the firmware disk may be defective. LED pattern If any other LED pattern is present, the CPU board is defective. Note If Grmware did not load, a red LED on the CPU board will be flashing.
Page 223 F N V C O ADJ ADJUSTMENT HOLE Figure 3-15. Location of the FN VCO TUNJZ Adjustment Figure 3-16. Fractioual-N Frequency Range Adjustment Display 3 4 5 Adjustments and Correction Constants...
Page 224 10. Observe the analyzer for the results of this adjustment: If the marker value is less than 7, you have completed this procedure. If the marker value is greater than 7, readjust ‘TN VCO ADJ” to 7. Then perform steps 2 to 10 to con&m that the channel 1 and channel 2 markers are stilI above and below the reference line respectively.
Page 225: Frequency Accuracy Adjustment
Antistatic Wrist Strap Cord ........
Page 226 PORT?: Figure 3-17. Frequency Accuracy Adjustment Setup Note Make sure that the spectrum analyzer and network analyzer references are connected. For Option lD5 Instruments Only: Remove the BNC-to-BNC jumper that is connected between the “EXT REF” and the “10 MHz Precision Reference,”...
Page 227 Option 006). 6. No adjustment is required if the spectrum analyzer measurement is within the following specifications: Otherwise, locate the Al2 assembly (red extractors) and adjust the VCXO ADJ (see Figure 3-18) for a spectrum analyzer center frequency measurement within specifications. 7.
Page 228: Instruments With Option Id5 Only
Instruments with Option lD5 Only 10. Reconnect the BNC-to-BNC jumper between the “EXT REF” and the “10 MHz Precision Reference” as shown in Figure 3-19. H I G H S T A B I L I T Y J U M P E R FREGUENCY ADJUST Figure 3-19.
Page 229: High/Low Band Transition Adjustment
High/Low Band Transition Adjustment This adjustment centers the VCO (voltage controlled oscillator) of the Al2 reference assembly for high and low band operations. 4. Press (Scale L.1] Lxl_] and observe the VCO tuning trace: If the left half of trace = 0 flOO0 mV and right half of trace = 100 to 200 mV higher (one to two divisions, see Figure 3-20): no adjustment is necessary.
Page 230 Figure 3-20. High/Low Band Transition Adjustment Trace Figure 3-21. High/Low Band Adjustment Locations Adjustments and Correction Constants...
Page 231: Fractional-N Spur Avoidance And Fm Sideband Adjustment
Cable, 509 Coax, BNC (m) to BNC (m) .......HP 10503A...
Page 232 Figure 3-22. Fractional-N Spur Avoidance and FM Sideband Adjustment Setup 3. Set the spectrum analyzer measurement parameters as follows: Reference Level Resolution Bandwidth 676.145105 MHz Center Frequency 2.5 kHz 3-55 Adjustments and Correction Constants...
Page 233 4. On the HP 8753E, press LPreset] (i&) IF- l&J w @ m {&&!“I&Q... s ..T . : . . : T : : ..... L . . .
Page 234 15. On the spectrum analyzer, set the center frequency for 676.003045 MHz. On the HP 8753E, press (Menu) YmFY$$Q. c-1 m. 17. Adjust the API4 (R47) for a null ( minimum amplitude) on the spectrum analyzer. 18. If this adjustment cannot be performed satisfactorily, repeat the entire procedure.
Page 235: Source Spur Avoidance Tracking Adjustment
BNC AIIigator Clip Adapter ........
Page 236 5. To make sure that you have connected the test points properly, adjust the CAV ADJ potentiometer while observing the analyzer display. You should notice a change in voltage. 6. Observe the phase locked loop error voltage: adjustment is necessary. If “spikes”...
Page 237: Unprotected Hardware Option Numbers Correction Constants
Unprotected Hardware Option Numbers Correction Constants This procedure stores the instrument’s unprotected option(s) information in A9 CPU assembly EEPROMs. 1. Make sure the A9 switch is in the Alter position. 2. Record the installed options that are printed on the rear panel of the analyzer.
Page 238 6. After you have entered all of the instrument’s hardware options, press the following keys: 7. View the analyzer display for the listed options 8. When you have entered all of the hardware options, return the A9 switch to the Normal position. 9.
Page 239: Sequences For Mechanical Adjustments
The network analyzer has the capability of automating tasks through a sequencing function. The following adjustment sequences are available via Access HP on the World Wide Web. High/Low Band Transition Adjustment (HBLBADJ) Fractional-N Spur Avoidance and F’M Sideband Adjustment (APIADJ)
Page 240: How To Set Up The Fractional-N Frequency Range Adjustment
How to Set Up the Fractional-N Frequency Range Adjustment 1. Remove the right-rear bumpers and right side cover. This exposes the adjustment location in the sheet metal. 2. Press (iGZ-j ~~~~~-.~..E~~~ (where X is the sequence number). 3. Adjust the “F’N VCO TUNE” with a non-metallic tool so that the channel 1 marker is as many divisions above the reference line as the channel 2 marker is below it.
Page 241: How To Set Up The Fractional-N Spur Avoidance And Fm Sideband Adjustment
Refer to Chapter 7, “Source Troubleshooting,” if you cannot perform the adjustment. How to Set Up the Fractional-N Spur Avoidance and FM Sideband Adjustment 1. Press B ~~~:~~~,~~~~~~’ (where X is the 2. Remove the upper-rear comer bumpers and the top cover, using a TORX screwdriver.
Page 242: Sequences For The Fractional-N Frequency Range Adjustment
Sequences for the Fractional-N Frequency Range Adjustment DISPLAY DUAL CHAN ON SYSTEM SERVICE MENU ANALOG BUS ON MENU NUMBER OF POINTS 11 xl COUPLED CHAN OFF START 36 M/u STOP 60.75 M./u MENU SWEEP TIME 12.5 k/m ANALOG IN 29 xl (FN VCO TUN) REF VALUE -7 xl CH 2 MENU...
Page 243: Sequences For The Fractional-N Avoidance And Fm Sideband Adjustment
REF VALUE 7 xl Sequences for the Fractional-N Avoidance and FM Sideband Adjustment TITLE SP 2.5K PERIPHERAL HPIB ADDR 18 xl TITLE TO PERIPHERAL WAIT x 0 xl TITLE AT ODB TITLE TO PERIPHERAL WAIT x 0 xl TITLE RM 1OOHz TITLE TO PERIPHERAL WAIT x 0 xl...
Page 244 TITLE ADJ Al3 API1 SEQUENCE PAUSE TITLE CF 676.007515MZ TITLE TO PERIPHERAL WATT x 0 xl CW FREQ TITLE ADJ Al3 API2 SEQUENCE PAUSE TITLE CF 676.00345OMZ TITLE TO PERIPHERAL 0 xl CW FREQ TITLE ADJ Al3 API3 SEQUENCE PAUSE TITLE CF 676.003045MZ TITLE TO PERIPHERAL...
Page 245 Locate the specific troubleshooting procedures to identify the assembly or peripheral at fault. To identify the portion of the analyzer at fault, follow these procedures: Step 1. Initial Observations Step 2. Operator’s Check Step 3. HP-IB Systems Check Step 4. Faulty Group Isolation Start Troubleshooting Here...
Page 246: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in an HP 8753E network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 247: Step 1. Initial Observations
Step 1. InitiaI Observations Initiate the Analyzer Self-‘I&t Disconnect all devices and peripherals from the analyzer. Switch on the analyzer and press WI. Watch for the indications shown in Figure 4-l to determine if the analyzer is operating correctly. Start Troubleshooting Here...
Page 248: Step 2. Operator's Check
Short ........
Page 249 Press ~E@WTE ‘EST to begin the test. 5. At the prompt, connect the short to the port indicated. Make sure the connection is tight. 7. The test is a sequence of subtests. At the end of the subtests, the test title and result will be displayed.
Page 250: Step 3. Hp-Ib Systems Check
Step 3. HP-IB Systems Check Check the analyzer’s HP-IB functions with a known. working passive peripheral (such as a plotter, printer, or disk drive). peripheral. 3. men press -~~~~~~~~~ and the appropriate softkeys to verify aat the device addresses will be recognized by the analyzer. The factory default...
Page 251: If Using A Plotter Or Printer
Multiple Peripherals”, “Troubleshooting Systems with Controllers”, or the “Step 4. Faulty Group Isolation” section in this chapter. If the result is not a copy of the analyzer display, suspect the HP-IB function of the analyzer. Refer to Chapter 6, “Digital Control Troubleshooting.
Page 252: Troubleshooting Systems With Multiple Peripherals
If the resultant trace starts at 1 MHz, HP-IB is functional in the analyzer. Continue with “Troubleshooting Systems with Multiple Peripherals”, “Troubleshooting Systems with Controllers”, or the “Step 4. Faulty Group Isolation” section in this chapter. If the resultant trace does not start at 1 MHz, suspect the HP-IB function of the analyzer: refer to Chapter 6, “Digital Control Troubleshooting.”...
Page 253: Step 4. Faulty Group Isolation
Step 4. Faulty Group Isolation Use the following procedures only if you have read the previous sections in this chapter and you think the problem is in the analyzer. These are simple procedures to verify the four functional groups in sequence, and determine which group is faulty.
Page 254: Power Supply
Power Supply Check the Rear Panel LEDs Switch on the analyzer. Notice the condition of the two LEDs on the Al5 preregulator at rear of the analyzer. (See Figure 4-3.) The upper (red) LED should be off. The lower (green) LED should be on. RED LED GREEN LED NORMALLY OFF...
Page 255: Digital Control
Digital Control Observe the Power Up Sequence Switch the analyzer power off, then on. The following should take place within a few seconds: On the front panel, observe the following: 1. All six amber LEDs illuminate. 2. The port 2 LED illuminates. 3.
Page 256: Verify Intemai Tests Passed
If the analyzer indicates failure but does not identify the test, press &) to search for the failed test. Then refer to Chapter 6, “Digital Control Troubleshooting.” Likewise, if the response to front panel or HP-IB commands is unexpected, troubleshoot the digital control group.
Page 258: Equipment Setup For Source Power Check
Figure 4-5. Equipment Setup for Source Power Check 2. Zero and calibrate the power meter. Press LPreset] on the analyzer to initialize the instrument. signal. The power meter should read approximately 0 deem. 4. Press [161 m to change the CW frequency to 16 MHz. The output power should remain approximately 0 dBm throughout the analyzer frequency range.
Page 259 Figure 4-6. ABUS Node 16: 1 V/GHz If any of the above procedures provide unexpected results, or if error messages are present, refer to Chapter 7, “Source Troubleshooting.” 4-15 Start Troubleshooting Here...
Page 260: Receiver
Input Connect the equipment as shown in F’igure 47 below. Be sure that any special accessories, such as limiters, have been disconnected. (The through cable is HP part number 8120-4779.) TEST PORT THRU CABLE Observe the measurement trace displayed by the A input. The trace should have about the same flatness as the trace in Figure 4-8.
Page 262: Accessories
Accessories If the analyzer has passed all of the previous checks but is still making incorrect measurements, suspect the system accessories Accessories such as RF or interconnect cables, calibration or verification kit devices, limiters, and adapters can ail induce system problems Reconfigure the system as it is normally used and reconllrm the problem.
Page 264: Power Supply Troubleshooting
Use this procedure only if you have read Chapter 4, “Start Troubleshooting Here.” Follow the procedures in the order given, unless: an error message appears on the display, refer to “Error Messages” near the end of this chapter. the fan is not working; refer to “Fan Troubleshooting” in this chapter. The power supply group assemblies consist of the following: All assemblies, however, are related to the power supply group because power is supplied to each assembly.
Page 265: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in an HP 8753E network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 266: Simplified Block Diagram
Simplified Block Diagram Figure 5-l shows the power supply group in simplified block diagram form. Refer to the detailed block diagram of the power supply (Figure 5-8) located at the end of this chapter to see voltage lines and specific connector pin numbers. PREREGULATOR O F F D U R I N G N O R M A L OPERAllON...
Page 267: Starthere
Start Here Check the Green LED and Red LED on Al5 Switch on the analyzer and look at the rear panel of the analyzer. Check the two power supply diagnostic LEDs on the Al5 preregulator casting by looking through the holes located to the left of the line voltage selector switch. (See Figure 5-2.) During normal operation, the bottom (green) LED is on and the top (red) LED is off.
Page 268: Check The Green Leds On A8
Check the Green LEDs on A8 Remove the top cover of the analyzer and locate the A8 post regulator; use the location diagram under the top cover if necessary. Check to see if the green visible without removing the PC board stabilizer). If all of the green LEDs on the top edge of A8 are on, there is a 95% confidence level that the power supply is verified.
Page 269 + 66 V (not used) + 64.6 to + 65.4 -14.4 to -15.6 -12.1 to -12.8 + 14.5 to + 15.5 + 5.05 to + 5.35 -5.2 V -5.0 to -5.4 5-5 Power Supply Troubleshooting...
Page 270: If The Green Led Of The Al5 Is Not On Steadily
If the Green LED of the Al5 Is not ON Steadily If the green LED is not on steadily, the line voltage is not enough to power the analyzer. Check the Line Voltage, Selector Switch, and Fuse Check the main power line cord, line fuse, line selector switch setting, and actual line voltage to see that they are all correct.
Page 271: Check The A8 Post Regulator
If the Red LED of the Al5 Is ON If the red LED is on or flashing, the power supply is shutting down. Use the following procedures to determine which assembly is causing the problem. Check the A8 Post Regulator 1.
Page 272: Verify The Al5 Preregulator
Figure 5-5. Power Supply Cable Locations Verify the Al6 Preregulator Verify that the Al5 preregulator is supplying the correct voltages to the A8 post regulator. Use a voltmeter with a small probe to measure the output voltages of...
Page 273 If the voltages are within tolerance, Al5 is verified. Continue to “Check for a Faulty Assembly”. -17.0 to -18.4 -0.4 to -14...
Page 274: Check For A Faulty Assembly
Figure 5-6. A15Wl Plug Detail Check for a Faulty Assembly This procedure checks for a faulty assembly that might be shutting down the the + 5 VCPU line through the motherboard the +5 VDIG line through the motherboard Do the following: 1.
Page 275 by the assembly that is being removed. After each assembly is removed or disconnected switch on the analyzer and observe the red LED on A15. Note before rewwwing or When extensive disassembly is required, refer to Chapter 14, “Assembly Replacement and Post-Repair Procedures. n Refer to Chapter 13, “Replaceable Parts,”...
Page 276: Check The Operating Temperature
Check the Operating Temperature The temperature sensing circuitry inside the Al5 preregulator may be shutting down the supply. Make sure the temperature of the open air operating environment does not exceed 55 OC (131 OF’), and that the analyzer fan is operating.
Page 277: Remove As, Maintain A15Wl Cable Connection
If the Green LEDs of the A8 are not all ON The green LEDs along the top edge of the A8 post regulator are normally on. Flashing LEDs on A8 indicate that the shutdown circuitry on the A8 post regulator is protecting power supplies from overcurrent conditions by repeatedly shutting them down.
Page 278: Remove The Assemblies
If the green LEDs are now on, the Al5 preregulator and A8 post regulator are working properly and the trouble is excessive loading somewhere after the motherboard connections at A8. Continue to “Remove the Assemblies”. Remove the Assemblies 1. Switch off the analyzer.
Page 279: Briefly Disable The Shutdown Circuitry
Briefly Disable the Shutdown Circuitry In this step, you shutdown the protective circuitry for a short time, and the supplies are forced on (including shorted supplies) with a 100% duty cycle. Damage to components or to circuit traces may occur if A8TP4 Caution (SDIS) is shorted to chassis ground for more than a few seconds 1.
Page 280 Make a list of these assemblies. Delete the following assemblies from your list as they have already been verified earlier in this section. All phase lock Switch off the analyzer. 5. of those assemblies that are left on the list, remove or disconnect them from the analyzer one at a time.
Page 281: Inspect The Motherboard
Removal or Receive Power from the Removed Assembly To Remove Disconnection Method Remove from Card Cage None 1. A3 Source Remove from Card Cage None Generator 2. A7 Pulse None 3. A4 R Sampler Remove from Card Cage None Remove from Card Cage 4.
Page 282: Error Messages
Error Messages Three error messages are associated with the power supplies functional group. They are shown here. POWER SUPPLY SHUT DOWN! one of the following conditions: overcurrent, overvoltage, or undervoltage. Refer to “If the Red LED of the Al5 Is ON” earlier in this procedure. POWER SUPPLY HOT The temperature sensors on the A8 post regulator assembly detect an overtemperature condition.
Page 283: Check The Fuses And Isolate .A8 . 1 : 1 . 1 1 1 : 1 : 1 1 1
Figure 5-7. Front Rmel Probe Power Connector Voltages If the correct voltages are present, troubleshoot the probe. If the voltages are not present, check the + 15 V and -12.6 V green LEDs on If the LEDs are on, there is an open between the A8 assembly and the front panel probe power connectors, Put A8 onto an extender board and measure the voltages at the following pins: -12.6 volts...
Page 284 If the + 15 V and -12.6 V green LEDs light, troubleshoot for a short between the motherboard connector pins XA8P2 pins 6 and 36 (-12.6 V) and the front panel probe power connectors. Also check between motherboard connector pins Power Supply Troubleshooting...
Page 285: Fan Speeds
Fan Troubleshooting The fan speed varies depending upon temperature. It is normal for the fan to be at high speed when the analyzer is just switched on, and then change to low speed when the analyzer is cooled. Check the Ran Voltages If the fan is dead, refer to the A8 post regulator block diagram (F’igure 5-8) at the end of this chapter.
Page 286: Intermittent Problems
Intermittent Problems PRESET states that appear spontaneously (without pressing -I) typically signal a power supply or A9 CPU problem. Since the A9 CPU assembly is the easiest to substitute, do so. If the problem ceases, replace the A9. If the problem continues, replace the Al5 preregulator assembly.
Page 288: Digital Control Troubleshooting
Digital IF Rear Panel Interface Begin with “CPU Troubleshooting,” then proceed to the assembly that you suspect has a problem. If you suspect an HP-IB interface problem, refer to “HP-IB Failures,” at the end of this chapter. Digital Control Troubleshooting...
Page 289: Digital Control Group Block Diagram
Digital Control Group Block Diagram Figure 6-1. Digital Control Group Block Diagram Digital Control Troubleshooting...
Page 290: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in an HP 8753E network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 291: Cpu Troubleshooting (A9)
CPU Troubleshooting (A9) The A9 CC switch must be in the NORMAL position for these procedures. This is the position for normal operating conditions. To move the switch to the NORMAL position, do the following: 1. Remove the power line cord from the analyzer. Set the analyzer on its side.
Page 292: Checking A9 Cpu Red Led Patterns
Figure 6-2. Switch Positions on the A9 CPU Checking A9 CPU Red LED Patterns The A9 CPU has five red LEDs that can be viewed through a small opening in the rear panel of the analyzer. (See Figure 6-3.) Four LEDs are easily viewable. The fifth LED must be viewed by looking to the left at an angle.
Page 293 Figure 6-3. CPU LED Window on Rear Panel 2. Cycle the power while observing all eight red LEDs With the analyzer positioned bottom up, cycle the power and observe the eight red LEDs while looking from the front of the instrument. Note If Grmware did not load, a red LED on the CPU board will be flashing.
Page 294: Display Troubleshooting (A2, A18, A19, A27)
Display Troubleshooting (A2, A18, A19, A27) This section contains the following information: Evaluating your Display Troubleshooting a White Display Troubleshooting a Black Display Evaluating your Display Switch the analyzer off, and then on. The display should be bright with the annotation legible and intelligible.
Page 295: Backlight Intensity Check
Antistatic Wrist Strap Cord ........
Page 296: Red, Green, Or Blue Pixels Specifications
H P 8753E N E T W O R K A N A L Y Z E R Figure 6-4. Backlight Intensity Check Setup Note The intensity levels are read with a display bezel installed. 5. If the photometer registers less than 50 Nits, the display backlight lamp is bad.
Page 297: Dark Pixels Specifications
Dark Pixels Specidications Dark “stuck on” pixels may appear against a white background. To test for ..In a properly working display, the following will not occur: more than 12 stuck pixels (not to exceed a maximum of 7 red, green, or blue) more than one occurrence of 2 consecutive stuck pixels stuck pixels less than 6.5 mm apart...
Page 298: Newtons Rings
3 Rings Acceptable 4 Rings Unacceptable 6-11 Digital Control Troubleshooting...
Page 299: Troubleshooting A White Display
Troubleshooting a White Display If the display is white, the A27 back light inverter is functioning properly. Connect a VGA monitor to the analyzer. If the image on the external monitor is normal, then suspect A2, AM, or the front panel cabling. Troubleshooting a Black Display 1.
Page 300: Front Panel Troubleshooting (Al, A2)
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”. If you suspect that one or more LEDs have burned out, replace the Al keypad assembly.
Page 301: Identify The Stuck Key
Identify the Stuck Key Match the LED pattern with the patterns in ‘Ihble 6-l. The LED pattern identifies the stuck key. Free the stuck key or replace the front panel part causing the problem. Front Active Channel Active Channel Instrument State Instrument State Instrument State Instrument State...
Page 302 LED Pattern Number lot used Digital Control Troubleshooting 6-15...
Page 303: Inspect Cables
Inspect Cables Remove the front panel assembly and visually inspect the ribbon cable that connects the front panel to the motherboard. Also, inspect the interconnecting ribbon cable between Al and A2. Make sure the cables are properly connected. Replace any bad cables. Test Using a Controller If a controller is available, write a simple command to the analyzer.
Page 304: Run The Internal Diagnostic Tests
Run the Internal Diagnostic ‘lksts The analyzer incorporates 20 internal diagnostic tests. Most tests can be run as part of one or both major test sequences: alI internal (test 0) and preset (test 1). . . _ _ . , . _ , . / _ 1.
Page 305 Probable Fniled - - - I 1 Preset to replace ROM or A9. 5 DSP WrlRd 9 DIP Control 10 DIP Counter 11 DSP Control 12 Fr Pan Wr/Rd between AS and A2 or on A9 assembly. 13 Rear Panel If OK, replace A16.
Page 306: If The Fault Is Intermittent
“Start Troubleshooting 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 A9 CPU and the Al6 rear panel. It does not check the HP-IB paths external to the instrument.
Page 307: Source Troubleshooting
Use this procedure only if you have read Chapter 4, “Start Troubleshooting Here.” This chapter is divided into two troubleshooting procedures for the following problems: Phase lock error: Perform the “Phase Lock Error” troubleshooting checks. The source group assemblies consist of the following: Source Troubleshooting 7-l...
Page 308: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in an HP 8753E network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here. n Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 310 Phase Lock Error SPECTRUM H P 8753E A N A L Y Z E R NETWORK A N A L Y Z E R Figure 7-1. Basic Phase Lock Error Troubleshooting Equipment Setup Troubleshooting tools include the assembly location diagram and phase lock diagnostic tools.
Page 311 LOST 1. Make sure the A9 CC switch is in the AIZER position: a. Remove the power line cord from the analyzer. b. Set the analyzer on its side. c. Remove the two corner bumpers from the bottom of the instrument with a T-15 TORX screwdriver.
Page 312: A4 Sampler/Mixer Check
new analog bus correction constants. Then press pretune correction constants Press I&Z&) ~~~~:~~~,~ ‘Q&f& L48) Lxl) ~~~:...~~. 1-i to generate new pretune correction constants. Press m and observe the analyzer display: a. No error message: restore the A9 CC jumper to the NRM position. Then refer to “Post-Repair Procedures”...
Page 313 Figure 7-3. Sampler/Mixer to Phase Lock Cable Connection Diagram If you connected W8 to: 3. Ignore the displayed trace, but check for phase lock error messages. If the phase lock problem persists, the R-channel sampler is the problem. Source Troubleshooting 7-7...
Page 314: A3 Source And All Phase Lock Check
This procedure checks the source and part of the phase lock assembly. It opens the phase-locked loop and exercises the source by varying the source output frequency with the A11 pretune DAC. Note If the analyzer failed internal test 48, default pretune correction constants were stored which may result in a constant offset of several MHz.
Page 315: Waveform Integrity In Src Tune Mode
O.OMOO met -SO. MO n.oc ch. 1 10.0 -miv Figure 7-4. Waveform Integrity in SRC Tune Mode The signal observed on the spectrum analyzer will appear jittery as in (B), not solid as in F’igure 7-5 (A). This is because in SRC TUNE Figure 7-5 mode the output is not phase locked.
Page 316 changes on the test instrument. (A power change of 20 dl3 wilI change the voltage observed on the oscilIoscope by a factor of ten.) 8. Note the results of the frequency and power changes: If the frequency and power output changes are correct, skip ahead to “Al2 Reference Check”...
Page 318: Yo Coil Drive Check With Oscilloscope
YO Coil Drive Check with Oscilloscope Use the large extender board for easy access to the voltage Note points. The extender board is included with the HP 8753 lb01 Kit. See Chapter 13, “Replaceable ParW, for part numbers and ordering information.
Page 319: Al2 Reference Check
The signals are evaluated with pass/fail checks. The most efficient way to check the Al2 frequency reference signals is to use the analog bus while referring to Alternatively, you can use an osciuoscope, while referring to ‘Ihble 7-3 and the figures, there is a 90% probability that the Al2 assembly is faulty. Either consider the Al2 assembly defective or perform the “A12 Digital Control Signals Check”.
Page 320 5. Press L24) Lxl] to count the frequency of the 2nd Lo signal..the corresponding 2nd Lo value for the CW frequency. (Refer to ‘lhble 7-2.) 7. Verify the remaining CW frequencies, comparing the counter reading with the value in Table 7-2: Press Press...
Page 321: Oscilloscope Method
Oscilloscope Method You need not use the oscilloscope method unless the analog bus is non-functional or any of the signals fail the specifications listed in mble 7-2. If the analog bus is non-functional or the previous check has revealed questionable signals, observe the signal(s) with an oscilloscope. ‘Pdble 7-3 identifies a convenient test point and a plot for the five signals listed.
Page 322 The 100 kHz pulses are very narrow and typically 1.5 V in amplitude. You may have to increase the oscilloscope intensity to see these pulses. (See Figure 7-8.) 0.00000 L 100.000 “* -100.000 us Figure 7-8. Sharp 100 kHz Pulses at A13TP5 (any frequency) 7-16 Source Troubleshooting...
Page 323: Plref Waveforms
REF is the buffered PLREF+ signal. The 1st IF is phase locked to this signal. Use an oscilloscope to observe the signal at the frequencies noted in Figure 7-9 and Figure 7-10. In high band the REF signal is a constant 1 MHz square High Band Signal.
Page 324 Low Band REF Signal. In low band this signal follows the frequency of the RF output signal. Figure 7-10 illustrates a 5 MHz CW signal. Figure 7-10. REF Signal at AllTP9 (5 MHz CW) If REF looks good, skip ahead to “4 MHz Reference Signal”. If REF is bad in low band, continue with TN Lo at Al2 Check”.
Page 325 FN LO at Al2 Check 1. Use an oscilloscope to observe the FN Lo from.&14 at the cable end of A14J2. Press (jj) (SystemJ ~~~~~,~~~~.. :~~~~.~~~~~~ ....i : ... . i ... . . ~ , ..../ . . ~ ..-.::: . : . < . . . : : ..U . L _..: . . < . t i . : . . . _ _: < . . : . , ... . . ~. . . W ~ ..~ ....2.
Page 326: Mhz Reference Signal
MHz Reference Signal This reference signal is used to control the receiver. If faulty, this signal can cause apparent source problems because the CPU uses receiver data to control the source. At A12TP9 it should appear similar to Figure 7-12. 500.000 l-was ch.
Page 327: 2Nd Lo Waveforms
The 2nd LO signals appear different in phase and shape at different frequencies. In high band, the 90 Degree Phase Offset of 2nd LO Signals in High Band. indicated by Figure 7-13, the 2nd Lo actually consists of two signals 90 degrees out of phase. 0.00000 mc -1.00000 “.OO Figure 7-13.
Page 328 Figure 7-14. In-Phase Low Band 2nd LO SSgnals (14 MHZ CW) Figure 7-14. In-Phase Low Band 2nd LO Signals (14 MHZ CW) If any of the signals of Table 7-2 are incorrect, the probability is 90% that the...
Page 329: Lenrefline
Several digital control signals must be functional for the Al2 assembly to operate properly. Check the control lines listed in ‘I%ble 7-4 with the oscilloscope in the high input impedance setting. Mnemonic Analyzer Description L-Reference Enable Preset L-Low Band ENREF Line. This is a TI’L signal. lb observe it, trigger on the negative edge. In preset state, the signal should show activity similar to Figure 7-15.
Page 330: A13/A14 Fractional-N Check
LB Lines. These complementary signals toggle when the instrument and L switches from low band to high band as illustrated by Figure 7-16. Figure 7-16. Complementary L J3.B and L LB Signals (Preset) If all of the digital signals appeared good, the Al2 assembly is faulty Use the analog bus or an oscilloscope to check the Al4 VCO’s ability to sweep from 30 MHz to 60 MHz.
Page 331: Al4 Vco Range Check With Oscilloscope
4. Check the counter reading at the frequencies indicated. If the readings are within the limits specified, the probability is greater than 90% that the fractional-N assemblies are functional. Either skip ahead to the “A7 PuIse Generator Check” or perform the more conclusive If the readings fail the specified limits, perform the “Al4 VCO Exercise”.
Page 332 Offrt Ch. 2 Figure 7-17. 10 MHZ HI OUT Wiweform from A14Jl Ch. 2 Figure 7-18. 25 MHz El OUT Wiweform from A14Jl 7-26 Source Troubleshooting...
Page 333: Al4 Vco Exercise
10.0 nmos/div Figure 7-19. 60 MHz HI OUT Waveform from A14Jl VCO Exercise The nominal tuning voltage range of the VCO is + 10 to -5 volts When the analyzer is in operation, this voltage is supplied by the Al3 assembly. This procedure substitutes a power supply for the Al3 assembly to check the frequency range of the Al4 VCO.
Page 334 0.00000 *es -50.000 - 5 0 . 0 0 0 “se.2 Figure 7-20. LO OUT Waveform at A14J2 4. Vary the voltage at A14TP14 from + 10 to -5 volts either by: a. Connecting an appropriate external power supply to A14TP14, or b.
Page 335: Al4 Divide-By-N Circuit Check
Note The Al3 assembly should still be out of the instrument and the 1. Ground A14TP14 and confirm (as in the Al4 VCO Exercise) that the VCO oscillates at approximately 50 to 55 MHz. 2. Put the analyzer in CW mode (to avoid relock transitions) and activate the F’RACN TUNE service mode.
Page 336 none L FNHOLD L F N H O L O FN LATCH Figure 7-21. Al4 Generated Digital Control Signals...
Page 337 signal is active during the 16 MHz to 31 MHz sweep. The H MB Line. This upper trace of F’igure 7-22 shows relative inactivity of this signal during preset condition. The lower trace shows its status during a 16 MHz to 31 MHz sweep with inactivity during retrace only.
Page 338: A7 Pulse Generator Check
The pulse generator affects phase lock in high band only. It can be checked with either a spectrum analyzer or an oscilloscope. 1. Remove the A7-to-A6 SMB cable (W7) from the A7 pulse generator assembly. Set the analyzer to generate a 16 MHz CW signal. Connect the spectrum analyzer to the A7 output connector and observe the signal.
Page 339: Rechecking The A13/A14 Fractional-N
Figure 7-24. High Quality Comb lboth at 3 GHz 3. If the signaI at the A7 output is good, check the A7-to-A4 cable. 4. If the signal is not as clean as F’igure 7-24, observe the HI OUT input signal to the A7 assembly.
Page 340: A7 Pulse Generator Check With Oscilloscope
Use a spectrum analyzer, to examin e the HI OUT signal from the Al4 assembly. The signal should appear as clean as Figure 7-25. The comb shape may vary from pulse generator to pulse generator. Figure 7-25. Stable HI OUT Signal in FRACN TUNE Mode Perform this check if a spectrum analyzer is not available.
Page 341: All Phase Lock Check
Figure 7-26. Typical 1st IF WAveform in FRACN lTJNE/SRC TUNE Mode All Phase Lock Check At this point, the All phase lock assembly appears to be faulty (its inputs should have been verified already). Nevertheless, you may elect to use the phase lock diagnostic routines or check the relevant signals at the assembly itself for confirmation.
Page 342: Phase Lock Check With Pll Diag
Phase Lock Check with PLL DIAG Refer to “Phase Lock Diagnostic Tools” in “Source Group Troubleshooting Appendix” at the end of this chapter for an explanation of the error messages and the diagnostic routines. Follow the steps there to determine in which state the phase lock is lost.
Page 343 0.00000 3 100 q s/div Figure 7-27. FM Coil - Plot with 3 Point Sweep 4. If any of the input signal is not proper, refer to the overall block diagram in Chapter 4, “Start Troubleshooting Here,” as an aid to trouble shooting the problem to its source.
Page 344: Source Group Troubleshooting Appendix
Source Group Troubleshooting Appendix Troubleshooting Source Problems with the Analog Bus The analog bus can perform a variety of fast checks, However, it too is subject to failure and thus should be tested prior to use. You should have done this in Chapter 4, “Start Troubleshooting Here.
Page 345: Phase Lock Diagnostic Routines
Phase Lock Diagnostic Routines Perform the following steps to determine at what frequencies and bands the phase lock problem occurs . . . A / ..A... ~ ~ . ~ ~ i i . % w. . : : : : . . : : : : : . : . : : : - :::..:: . . . d ..A ..u . . i ..A . . . i . . . , ..: . , ....L i i ........::..x i i i switch off the automatic phase-locked loop.
Page 346: Receiver Troubleshooting
Use this procedure only if you have read Chapter 4, “Start Troubleshooting Here. n Follow the procedures in the order given, unless instructed otherwise. The receiver group assemblies consist of the following: Receiver Troubleshooting 8-1...
Page 347: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in an HP 8753E network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 348: Receiver Failure Error Messages
Receiver Failure Error Messages The error messages which indicate receiver group problems may be caused by the instrument itself or by external devices or connections. The following three error messages share the same description. CAUTION: OVERLOAD ON INPUT A, POWER REDUCED CAUTION: OVERLOAD ON INPUT R, POWER REDUCED If any of the above error messages appear, the analyzer has exceeded approximately + 14 dBm at one of the test ports.
Page 349 Good inputs produce traces similar to Figure 8-2 in terms of flatness. To examine both input traces, do the following: 1. Connect the equipment as shown in Figure 8-1. (The through cable is HP part number 8120-4779.) Figure S-l. Equipment Setup...
Page 350 Figure 8-2. Typical Good Trace Receiver Troubleshooting 8-5...
Page 351: Troubleshooting When Au Inputs Look Bad
Troubleshooting When All Inputs Look Bad Run Internal Tests 18 and 17 the ADC offset. 2. Then, when the analyzer finishes test 18, press L17) Lxl) .~~~~~~~~ to run the ADC linearity test. If either of these tests FAIL, the A10 assembly is probably faulty. This can be checking the signals listed in Table 8-l.
Page 352 Check the 4 MHz REF Signal 1. Press w. 2. Use an oscilloscope to observe the 4 MHz reference signal at AlOP2-6. If the signal does not resemble Figure 8-3, troubleshoot the signal source If the signal is good, the probability is greater than 90% that the A10 assembly is faulty.
Page 353: Check A10 By Substitution Or Siiai Examination
Check A10 by Substitution or Signal Examination If the 4 MHz REF signal is good at the A10 digital IF assembly, check the A10 assembly by one of the following methods: Substitute another A10 assembly or Check the signal/control lines required for its operation. The pins and signal sources of those lines are identified in ‘Ihble 8-1.
Page 354 Mnemonic Description Digital lF data 7 (MSB) L DIPEN Digital IF enable 0 L D-1 Digital IF enable 1 L DIFEN2 Digital IF enable 2 Digital IF conversion camp. Digital IF aerial clock Digital lF aerial data out L-enable digital IF L-interrupt, DSP ‘Check for Tl’L activity.
Page 355 * DIF DATA consists of 16 serial bits per input conversion. the LSB is on the right side and is the most volatile. Figure 8-4. Digital Data Lines Observed Using L INTCOP as Trigger Figure 8-5. Digital Control Lines Observed Using L INTCOP as Trigger...
Page 356: Troubleshooting When One Or More Inputs Look Good
Troubleshooting When One or More Inputs Look Good Since at least one input is good, all of the common receiver circuitry beyond the multiplexer is functional. Only the status of the individual sampler/mixers and their individual signal paths is undetermined. Check the 4 kHz Signal Press 2.
Page 358 If the trace shows no improvement when the sampler correction constants are toggled from off to on, perform the “Sampler Magnitude and Phase Correction Constants (Test 53)” adjustment described in Chapter 3, “Adjustments and Correction Constants” If the trace remains bad after this adjustment, the A10 assembly is defective.
Page 359: Check 2Nd Lo Signal At Sampler/Mixer
Check 1st LO Signal at Sampler/Mixer If the 4 kHz signal is bad at the sampler/mixer assembly, check the 1st LO signal where it enters the sampler/mixer assembly in question. If the 1st LO is faulty, check the 1st LO signal at its output connector on the If the 1st LO is good, continue with “Check 2nd LO SiiaI at Sampler/Mixer”.
Page 360: Accessories Troubleshooting
Accessories Troubleshooting Use this procedure only if you have read Chapter 4, “Start Troubleshooting Here.” Follow the procedures in the order given, unless instructed otherwise. Measurement failures can be divided into two categories: incorrect measurement data. use of a feature. This chapter addresses the First category of failures which are usually caused by the following: operator errors...
Page 361: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in an HP 8753E network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 362: Inspect The Accessories
Inspect the Accessories Inspect the Test Port Connectors and Calibration Devices 1. Check for damage to the mating contacts of the test port center conductors and loose connector bulkheads. 2. Inspect the calibration kit devices for bent or broken center conductors and other physical damage.
Page 363 If you detect problems using error term analysis, use the following approach to isolate the fault: 1. Check the cable by e xamining the load match and transmission tracking terms. If those terms are incorrect, go to “Cable Test.” 2. Verify the calibration kit devices: Loads: If the directivity error term looks good, the load and the test port are good.
Page 364: Cable Test
Cable Test The load match error term is a good indicator of cable problems. You can further verify a faulty cable by measuring the reflection of the cable. Perform an Sll l-port calibration directly at port 1 (no cables). Then connect the suspect cable to port 1 and terminate the open end in 50 ohms.
Page 365: Verify Shorts And Opens
If the devices are not from one of the standard calibration kits, refer to the HP 8753E Network A~~~lyzer User’s Guide and open that are causing the problem. 1. Perform an Sll l-port calibration using the good short and open. Then press .
Page 366 Figure 9-2. Typical Smith Chart Traces of Good Short (a) and Open (b) Accessories Troubleshooting 9-7...
Page 367: Service Key Menus And Error Messages
2. Service Features When applicable, the HP-IB mnemonic is written in parentheses following the key. See HP-IB Service Mnemonic Definitions at the end of this section. Error Messages The displayed messages that pertain to service functions are also listed in this chapter to help you: Understand the message.
Page 368: Service Key Menus . Internal Diagnostics
Figure 10-l. Internal Diagnostics Menus Throughout this service guide, these conventions are observed: Note q ~~~~~ itre dispIay detied keys (in the menus). (HP-IB COMMANDS) when applicable, follow the keystrokes in parentheses. 1 O-2 Service Key Menus and Error Messages...
Page 369: Tests Menu
To access this menu, press w ~~~~~,~~ :,TlZYK$:. . i . _ . . . / accesses a menu that allows you to select or execute the service tests The default is set to internal test 1. Descriptions of tests in each of the categories are given under Note the heading Z&Z the following pages.
Page 370 OUTPTESS. For more information, refer to “HP-IB Service Mnemonic Definitions” located at the end of this chapter. runs the selected test and may display these softkeys: . ~~~. 2 2> ..A..~.W~..> ..i ..::: .
Page 371: Test Options Menu
When the function is ON, certain test results are sent to a printer via HP-IB. This is especially useful for correction constants. The indent must be in system controller mode or pass control mode to print (refer to the “Printing, Plotting, and Saving...
Page 372 accesses the power loss/sensor lists menu: .._ .., .., ..s .., ....; . . calibration factor list for use in power meter calibration measurements.
Page 373: Self Diagnose Softkey
If all pass, this test displays a PASS status. Each test in the subset retains its own test status. This same subset is available over HP-IB as “TST?“. It is not performed upon remote preset.
Page 374 Verifies the A9 CPU SRAM (long-term) memory with a RAM. non-destructive write/read pattern. destructive version that writes over stored data at power-on can be enabled by changing the 4th switch position of the A9 CPU switch as shown in Figure 10-2. Normal Mode Destructive SRAM Rocker...
Page 375 It tests the Al6 rear panel, and A9 CPU data buffering and address decoding. (It does not test the HP-IB interface; for that, see the HP-IB Programming Guide.) This runs only when selected or with ALL INTERNAL.
Page 376 Tests the ability of the A9 CPU main processor to Cont. write/read to the control element on the Al4 fractional-N (digital) assembly. The control element must be functioning, and the phase-locked) to pass. Sweep Trig. Tests the sweep trigger (L SWP) Iine from the Al4 synchronizes L SWP.
Page 377: External Tests
External Tests These tests require either external equipment and connections or operator interaction of some kind to run. Tests 30 and 60 are comprehensive front panel checks, more complete than test 12, that checks the front panel keys and knob entry.
Page 378: System Verification Tests
(error terms) resuhing from a measurement calibration; refer to Chapter 11, “Error Terms,” for details. Ver Init. from an HP 8753E verification disk, in preparation for a measurement calibration. It must be done before service internal tests 28, 29, 30, or 31 are performed.
Page 379: Adjustment Tests
48, below. Source Measures source output power accuracy, flatness, and linearity against an external power meter via HP-IB to generate new correction constants Run tests 44, 45,46, and 48 first. Generates source pretune values for proper phase-locked loop operation. Run tests 44, 45, and 46 first.
Page 380 Stores the serial number (input by the user in the Display Serial Cor. Title menu) in EEPROM. This routine will not overwrite an existing serial number. Stores the option keyword (required for Option 002, 006, Option hr. 010 or any combination). Not used.
Page 381: Display Tests
Display Tests These tests return a PASS/FAIL condition. All six amber front panel LEDs will turn off if the test passes. Press m to exit the test. If any of the six LEDs remain on, the test has failed. Checks to con&n that the CPU can communicate with the A19 GSP board.
Page 382: Test Patterns
Test Patterns Test patterns are used in the factory for display adjustments, diagnostics, and troubleshooting, but they are not used for field service. Test patterns are executed by entering the test number (66 through SO), then pressing ..
Page 383 of Green (each band increasing in intensity) Black four bands of Blue (each band increasing in intensity) Black If any one of the four bits for each color is missing the display will not look as described. 10. Displays a character set for showing the user ail the different types and sizes of characters available.
Page 384: Service Key Menus - Service Features
Service Key Menus - Service Features The service feature menus are shown in F’igure 10-3 and described in the following paragraphs. The following keys access the service feature menus: Figure 10-3. Service Feature Menus Service Modes Menu allows you to control and monitor various circuits for troubleshooting.
Page 385 Change frequencies with the front panel keys or knob. The output of the Al4 assembly can be checked at A14Jl HI OUT (in high band) or A14J2 LO OUT (in low band) with an oscilloscope, a frequency counter, or a spectrum analyzer. Siiai jumps and changes in shape at 20 MHz and 30 MHz when tuning up in frequency, and at 29.2 MHz and 15 MHz when tuning down, are due to switching...
Page 386 With this mode switched OFF, the source stays in the pretune mode and does not attempt to complete the phase lock sequence. Also, all phase lock error messages are disabled. The fractional-N circuits and the receiver operate normally. Therefore, the instrument sweeps, but the source is being driven by the pretune DAC in a stair-stepped fashion.
Page 387: Service Modes More Menu
Service Modes More Menu Toggles the sampler correction routine ON, for normal operation, or OFF, for diagnosis or adjustment purposes Normal operating condition and works in . ; ; / . i i ....i i . conjunction with IF GAIN ON and OFF.
Page 388: Analog Bus
manually, although the procedures are more time consuming. offsets the frequency of both the A3 YIG oscillator and the A3 cavity oscillator to avoid spurs which allows e xamination of these spurs for service. enables and disables the analog bus, described below.
Page 389: The Frequency Counter
CW mode. It can be used in conjunction with ~S~~~~~.~~~~ for troubleshooting phase lock and source problems. To read the counter over HP-ES, use the command OUTPCNTR. Notes The display and marker units (U) correspond to volts Nodes 17 (1st IF) and 24 (2nd LO) are unreliable above 1 MHz.
Page 390: Analog In Menu
(Note: Using the counter slows the sweep.) The counter bandwidth is 16 MHz unless otherwise noted for a specific node. OUTPCNTR is the HP-IB command to output the counter’s Note frequency data. 1 O-24...
Page 391 switches the counter to monitor the analog bus. switches the counter to monitor the Al4 fractional-N VCO frequency at the node shown on the “Overall Block Diagram, m in the “Start Troubleshooting” chapter. switches the counter to monitor the Al4 fractional-N VCO frequency after it has been divided down to 100 kHz for phase locking the VCO.
Page 392: Analog Bus Nodes
Analog Bus Nodes The following paragraphs describe the 31 analog bus nodes. The nodes are listed in numerical order and are grouped by assembly. Refer to the “Overall Block Diagram” for node locations. step A3 to set up a power sweep on the analog bus. Then follow the node specific instructions.
Page 393 Node 1 Perform step A3 to set up a power sweep on the analog bus. Then press m Node 1 is the output of the main power DAC. It sets the reference voltage to the ALC loop. At normal operation, this node should read approximately -4 volts at 0 dBm with a slope of about -150 mV/dB.
Page 394 Src lV/GHz (source 1 volt per GHz) Node 2 Press the following to view analog bus node 2: Node 2 measures the voltage on the internal voltage controlled oscillator. Or, in normal operation, it should read -lV/GHz. Figure 10-5. Analog Bus Node 2 Service Key Menus and Error Messages...
Page 395 Amp Id (ampltier current) Node 3 Press the following keys to view analog node 3: Node 3 measures the current that goes to the main IF amplifier. At normal operation this node should read about: 15 mA from 30 kHz to 299 kHz 130 mA from 300 kHz to 3 GHz 500 mA from 3 GHz to 6 GHz 1 O-29...
Page 396 Det (detects RF OUT power level) Node 4 Perform step A3, described previously, to set up a power sweep on the analog Node 4 detects power that is coupled and detected from the RF OUT arm to the ALC loop. Note that the voltage exponentially follows the power level inversely. Flat segments indicate ALC saturation and should not occur between -15 dBm and + 10 dBm.
Page 397 Node 5 This node registers the temperature of the cavity oscillator which must be known for effective spur avoidance. The sensitivity is 10 mV/” C. The oscillator changes frequency slightly as its temperature changes. This sensor indicates the temperature so that the frequency can be predicted. Node 6 Integ (ALC leveling integrator output) Perform step A3 to set up a power sweep on the analog bus.
Page 398 Log (log ampliiier output detector) Node 7 Perform step A3 to set up a power sweep on the analog bus. Then press LMeas) Node 7 displays the output of a logger circuit in the ALC loop. The trace should be a linear ramp with a slope of 33 mv/dB with approximately 0 volts at -3 dBm.
Page 399 node-specific instructions Step AlO. Press: Perform step AlO, above, and then press IMeas) ~~~~~~~~~: Check for a flat line at approximately + 0.37 V. This is used as the voltage reference in the “Analog Bus Correction Constants” adjustment procedure. The voltage level should be the same in high and low resolution;...
Page 400: All Phase Lock
S-parameter response of the test device on the other display channel. With .JKK&&%EY switched ON, you can examine the analyzer’s analog bus nodes heading). For HP-IB considerations, see “HP-1B Service Mnemonic Definitions,” located later in this chapter. Node This node is used in the “Analog Bus Correction Constants”...
Page 401 Node 14 Perform step Al 1 and then press IMeas) $&$$X&$ rmr” (141 a w @ Ixl] The trace should be a flat line across the entire operation frequency range within 0.3 (one division) of the reference value. Vbb Ref is used to compensate for ECL voltage drift.
Page 402 Node 15 This node displays the source pretune signal and should look like a stair-stepped ramp. Each step corresponds to the start of a band. Figure 10-11. Analog Bus Node 15 Service Key Menus and Error Messages...
Page 403 Node 16 ..i ... : : : : . Perform step A11 and then press m ‘$@&$%:Z# (161 @J (Z&TZ] ..Li i::::.:._;;~ ..~ . ~ . C . Z ...
Page 404 Node 17 Vary the frequency and compare the results to the table below. Entered Frequency Counter Reading 0.2 to 15.999 MHz same as entered This node displays the IF frequency (see node17) as it enters the All phase lock assembly via the A4 R sampler assembly. This signal comes from the R sampler output and is used to phase lock the source.
Page 405 IF Det 2N (IF on All phase lock after 3 MHz filter) Node 18 Perform step A11 and then press B ~~~~~:~~~ L18) (xl) m L20) m This node detects the IF within the low pass IIIter/iimiter. The IiIter is used during the track and sweep sequences but never in band l(3.3 to 16 MHz).
Page 406 Node 20 IF Det 1 (IF after 30 MHz filter) .._ _ _ _ , . . The trace should be a flat Iine across the entire frequency band at least 0.5 V greater than Vbb (node 14). The correct trace indicates the presence of IF after the lirst 30 MHz filter/limiter.
Page 407 Node 21 100 kH2 (100 kH2 reference frequency) Perform step Al2 and then press (EJJ ~~~~~~~:~~~.~~ L21) Lxl) signal that is used on Al3 (the fractional-N analog assembly) as a reference frequency for the phase detector. Node 22 VCO Tune (Al2 VC0 tuning voltage) Node 23 The trace should show a voltage step as shown in Figure 10-16.
Page 408 Node 24 This node counts the 2nd LO used by the sampler/mixer assemblies to produce the 2nd IF of 4 kHz. As you vary the frequency, the counter reading should change to values very close to those indicated below: Node 25 PL Ref (phase lock reference) This node counts the reference signal used by the phase comparator circuit on the All phase lock assembly.
Page 409: Al4 Fractional-N (Digital)
Ext l&f (rear panel external reference input) Node 26 Perform step Al2 and then press B &@@~ :Ihl 126) Lxl). The voltage level of this node indicates whether an external reference timebase is being used: No external reference: about -0.9 V With external reference: about -0.6 V.
Page 410 Node 29 FN VU3 Tun (Al4 FN VCO tuning voltage) Perform step Al4 and then press LMeas) ~~~~~~~‘;;~# (29) @J c-1 Observe the Al4 F’N VCO tuning voltage. If the Al3 and Al4 assemblies are functioning correctly and the VCO is phase locked, the trace should look Iike Figure 10-17.
Page 411 FN VC0 Det (Al4 VC0 detector) Node 30 See whether the F’N VCO is oscillating. The trace should resemble Figure 10-18. Figure 10-18. Analog Bus Node 30 Node 31 You should see a flat line at + 5 V across the operating frequency range. The counter gate activity occurs during bandswitches, and therefore is not visible on the analog bus.
Page 412: Peek/Poke Menu
PEEK/POKE Menu .._.:: allows you to edit the content of one or more memory addresses The keys are described below. The PEEK/POKE capability is intended for service use only. Caution accesses any memory address and shows it in the active entry area of the display.
Page 413: Firmware Revision Softkey
Firmware Revision Softkey in the active entry area of the display as shown in Figure lo-19 below. The analyzer’s serial number and installed options are also displayed. Another way to display the Grmware revision information is to cycle the line power. REFO dB STOP 6 000.000 000 MHz START...
Page 414: Invoking Tests Remotely
System Menu (MENUSYST) and using the analyzer mnemonic numbered 1 to 8 from top to bottom.) An HP-IB overview is provided in the “Compatible Peripherals” chapter in the User’s ouide. HP-IB programmin g information is also provided in the Programming Guide. Invoking Tests Remotely Many tests require a response to the displayed prompts.
Page 415: Analog Bus Codes
Analog Bus Codes Measures and displays the analog input. The preset state input to the analog bus is the rear panel AUX IN. The other nodes may be selected with ip., only if the AEKJS is enabled (ANABon). Outputs the counter’s frequency data. OUTPCNTR Reads any prompt message sent to the error queue by a service routine.
Page 416: Error Messages
The error messages that pertain to measurement applications Note are included in the HP 8753E Network Anulgzer User’s Guide. BATTERY FAILED. STATE MEMORY CLEARED Error Number The battery protection of the non-volatile SRAM memory has failed. The SRAM memory has been cleared. Refer to the 1 8 3 “Assembly Replacement and Post-Repair Procedures”...
Page 417 CALIBRATION REQUIRED Error Number A calibration set could not be found that matched the current stimulus state or measurement parameter. You will have to perform a new calibration. CORRECTION CONSTANTS NOT STORED Error Number A store operation to the EEPROM was not successful. You must change the position of the jumper on the A9 CPU assembly.
Page 418 Error Number The disk cannot be accessed by the analyzer. Verify power to the disk drive, and check the HP-B3 connection between the analyzer and the disk drive. Ensure that the disk drive address recognized by the analyzer matches the HP-IB address set on the disk drive itself.
Page 419 DISK READ/WRITE ERROR Error Number There may be a problem with your disk. Try a new floppy disk. If a new floppy disk does not eliminate the error, suspect hardware problems. INITIALIZATION FAILED Error Number The disk initialization failed, probably because the disk is damaged.
Page 420 NO FILE(S) FOUND ONDISK Error Number No files of the type created by an analyzer store operation were found on the disk. If you requested a specific hle title, that hle was not found on the disk. NO IF FOUND: CHECK R INPUT LEVEL Error Number The first IF signal was not detected during pretune.
Page 421 NOT ALLOWED DURING POWER METER CAL Error Number When the analyzer is performing a power meter calibration, the HP-IB bus is unavailable for other functions such as printing or plotting. OVER LOAD ON INPUT A, POWER REDUCED Error Number See error number 57.
Page 422 PARALLEL PORT NOT AVAILABLE FOR COPY Error Number You have dellned the parallel port as general purpose I/O (GPIO) for sequencing. The definition was made under the (Local key menus. To access the pamIle port for copy, set the selection to .
Page 423 POSSIBLE FALSE LOCK Error Number Phase lock has been achieved, but the source may be phase locked to the wrong harmonic of the synthesizer. Perform the source pretune correction routine documented in the “Adjustments and Correction Constants” chapter. POWER METER INVALID Error Number The power meter indicates an out-of-range condition.
Page 424 HP-B3 address set on the printer itself. PROBE POWER SHUT DOWN! Error Number The analyzer biasing supplies to the HP 85024A external probe are shut down due to excessive current. Troubleshoot the probe, and refer to the “Power Supply Troubleshooting” chapter.
Page 425 PWR MTR: NOT ON/CONNECTED OR WRONG ADDRS Error Number The power meter cannot be accessed by the analyzer. Verify that the power meter address and model number set in the analyzer match the address and model number of the actual power meter.
Page 426 SWEEP MODE CHANGED TO CW TIME SWEEP Error Number If you select external source auto or manuai instrument mode and you do not also select CW mode, the anaIyzer is automatically switched to CW. TEST ABORTED Error Number You have prematurely stopped a service test. TROUBLE! CHECK SETUP AND START OVER Service Error Your equipment setup for the adjustment procedure in progress Number 115 is not correct.
Page 427: Error Lkrms
“Optimizmg Measurement Results” chapter of For details on the theory of the HP 8753E Network Anulger User’s Guide. error-correction, refer to the “Application and Operation Concepts” chapter of the HP 8753E Network Anulgm User’s Guide.
Page 428 connector and cable wear, or gradual degradation, indicating the need for further investigation and preventive maintenance. Yet, the system may still conform to specifications. The cure is often as simple as cleaning and gaging connectors or inspecting cables. If a subtle failme or mild performance problem is Troubleshooting: suspected, the magnitude of the error terms should be compared against values generated previously with the same instrument and calibration kit.
Page 429 This is the most accurate error-correction procedure. Since the Note analyzer takes both forward and reverse sweeps, this procedure takes more time than the other correction procedures. 1. Set any measurement parameters that you want for the device measurement: power, format, number of points, IF bandwidth. 2.
Page 430 FOR I SOLAT ION FOR TRANSMISSION FOR REFLECT I ON HP 8753E HP 8753E HP 8753E NETWORK ANALYZER NETWORK ANALYZER NETWORK ANALYZER Figure 11-l. Standard Connections for Full Two-Port Error-Correction 114 Error Terms...
Page 431 The analyzer underlines the Bi&$i. softkey after it measures the standard. Disconnect the open, and connect a short circuit to PORT 1. To measure the device, when the displayed trace has settled, press: Disconnect the short, and connect an impedance-matched load to PORT 1. The analyzer tmderlines the :&&I&...
Page 433 Use the menus under @JEGi$ or refer to “Printing, Plotting, and Saving Measurement Results” located in the User’s cui&e for procedures. HP 87533 Network Anulgger 18. This completes the full two-port correction procedure. You can connect and measure your device under test. Error Terms...
Page 434: Error L&M Inspection
11-2. 5. Make a hardcopy of the measurement results: a. Connect a printing or plotting peripheral to the analyzer. appropriate peripheral to verify that the HP-IR address is set correctly on the analyzer..
Page 435: If Error Terms Seem Worse Than Typical Values
If Error Terms Seem Worse than Typical Values 1. Perform a system verification to verify that the system still conforms to specifications. 2. If system verification fails, refer to “Start Troubleshooting Here. n Uncorrected Performance The following table shows typical performance without error-correction. RF cables are not used except as noted.
Page 436 Error ‘I&m Descriptions The error term descriptions in this section include the following information: significance of each error term typical results following a full 2-port error-correction guidelines to interpret each error term The same description applies to both the forward (F’) and reverse (R) terms. 1 1 - 1 0 ErrorTerms...
Page 437: Directivity (Edf And Edr)
Directivity Description Directivity is a measure of any detected power that is reflected when a load is attached to the test port. These are the uncorrected forward and reverse directivity error terms of the system. The directivity error of the test port is determined by measuring the reflection (Sll, S22) of the load during the error-correction procedure.
Page 438: Source Match (Esf And Esr)
Source Match (ESF and ESR) Description Source match is a measure of test port connector match, as well as the match between all components from the source to the test port. These are the forward and reverse uncorrected source match terms of the driven port. short calibration kit device bridge test port connectors...
Page 439: Significant System Components
Reflection Tracking (ERF and ERR) Description Reflection tracking is the difference between the frequency response of the reference path (R path) and the frequency response of the reflection test path (A or B input path). Significant System Components open calibration kit device short calibration kit device R signal path if large variation in both F,RF’...
Page 440: Significant System Components
Isolation (Crosstalk, EXF and EXE) Description Isolation is a measure of the leakage between the test ports and the signal paths The isolation error terms are characterized by measuring transmission procedure. Since these terms are low in magnitude, they are usually noisy (not very repeatable).
Page 441 Load Match (ELF and ELR) Description Load match is a measure of the impedance match of the test port that terminates the output of a 2-port device. Load match error terms are characterized by measuring the reflection (Sll, S22) responses of a “through” configuration during the calibration procedure.
Page 442: Significant System Components
Transmission Tracking (ETF and ETE) Description Transmission tracking is the difference between the frequency response of the reference path (including R input) and the transmission test path (including A or B input) while measuring transmission. The response of the test port cables is included.
Page 443: Theory Of Operation
Theory of Operation This chapter is divided into two major sections: “How the HP 8753E Works” gives a general description of the HP 8753E network analyzer operation. “A Close Look at the Analyzer’s Functional Groups” provides more detailed operating theory for each of the analyzer’s functional groups.
Page 444: The Built-In Synthesized Source
The analyzer’s built-in synthesized source produces a swept RF signal in the range of 30 kHz to 3.0 GHz. The HP 8753E Option 006 is able to generate signals up to 6 GHz. The source output power is leveled by an internal ALC (automatic leveling control) circuit.
Page 445: The Receiver Block
The Built-In lkst Set The HP 8753E features a built-in test set that provides the signal separation capability for the device under test, as well as to the signal-separation devices. The signal separation devices are needed to separate the incident signal from the transmitted and reflected signals.
Page 446: A Close Look At The Analyzer's Functional Groups
A Close Look at the Analyzer’s Functional Groups The operation of the analyzer is most logically described in five functional groups. Each group consists of several major assemblies, and performs a distinct function in the instrument. Some assemblies are related to more than one group, and in fact all the groups are to some extent interrelated and affect each other’s performance.
Page 447: Power Supply Theory
Power Supply Theory The power supply functional group consists of the Al5 preregulator and the that provides regulated DC voltages to power all assemblies in the analyzer. The the display. It is connected to the A8 post regulator by a wire bus A15Wl. A L L D U R I N G O F F...
Page 448: Line Power Module
Refer to the for line voltage HP 8753E Network Anulgzer lhstalhttin and Quick Start Guide tolerances and other power considerations. The switching preregulator converts the line voltage to several DC voltages. The regulated +5 V digital supply goes directly to the motherboard.
Page 449: A8 Post Regulator
The A8 post regulator lllters and regulates the DC voltages received from the voltage supplies. It distributes regulated constant voltages to individual assemblies throughout the instnunent. It includes the overtemperature shutdown circuit, the variable fan speed circuit, and the air flow detector. Nine green LEDs provide status indications for the individual voltage supplies Refer to the Power Supply Block Diagram located at the end of Chapter 5, “Power Supply Troubleshooting”, to see the voltages provided by the A8 post...
Page 450: Display Power
Display Power The A8 assembly supplies +5 VCPU to the A19 GSP through the motherboard. The GSP converts a portion of the +5 VCPU to 3.3 V to drive the display and LVDS (low voltage differential signaling) logic The A19 GSP also controls and supplies power to the A27 backlight inverter.
Page 451 Theory of Operation 12-9...
Page 452: Al Front Panel
The main CPU is a 32-bit microprocessor that maintains digital control over the entire instrument through the instrument bus The main CPU receives external control information from the front panel or HP-IB, and performs processing and formatting operations on the raw data in the main RAM. It controls the digital signaI processor, the front panel processor, the display processor, and the interconnect port interfaces.
Page 453: Eeprom
The main CPU has a dedicated flash ROM that contains the operating system for instrument control. Front panel settings are stored in SRAM, with a battery providing at least 5 years of backup storage when external power is off. Main RAM The main RAM (random access memory) is shared memory for the CPU and the digital signal processor.
Page 454: A19 Gsp
A19 GSP The A19 graphics system processor is the main interface between the A9 CPU and the Al8 display. The CPU (A9) converts the formatted data to GSP commands and writes it to the GSP. The GSP processes the data to obtain the necessary video signals, which are then used for the following purposes: The video signals are used to produce VGA compatible RGB output signals, which are routed to the Al6 rear panel.
Page 455 This output is connected 10 MHZ PRECISION REFERENCE. (Option lD5) to the EXT REF (described above) to improve the frequency accuracy of the analyzer. INPUT. This allows for a dc or ac voltage input from an external signal source, such as a detector or function generator, which you can then measure, using the S-parameter menu.
Page 456: Source Theory Overview
Source Theory Overview The source produces a highly stable and accurate RF output signal by phase locking a YIG oscillator to a harmonic of the synthesized VCO (voltage controlled oscillator). The source output produces a CW or swept signal between 300 kHz and 3 GHz (or 300 kHz and 6 GHz for Option 006) with a maximum leveled power of + 10 dBm.
Page 457: A7 Pulse Generator
A step recovery diode in the pulse generator produces a comb of harmonic multiples of the VCO output. These harmonics provide the high band LO (local oscillator) input to the samplers. In low band and super low band the operation the pulse generator is turned off.
Page 458: Source Low Band Operation
Source Low Band Operation The low band frequency range is 300 kHz to 16 MHz. These frequencies are generated by locking the A3 source to a reference signal. The reference signal is synthesized by mixing down the fundamental output of the fractional-N VCO with a 40 MHz crystal reference signal.
Page 459 A synthesized sub sweep is generated. The source tracks the When lock is achieved at the start frequency, the synthesizer synthesizer. starts to sweep. This changes the phase lock reference frequency, and causes the source to track at a difference frequency 40 MHz below the synthesizer. Theory of Operation...
Page 460 The full low band is produced in two sub sweeps, to allow addition IF sltering below 3 MHz. At the transition between subsweeps, the source is pretuned and then relocks. ‘Ihble 12-2 lists the low band subsweep frequencies at the fractional-N VCO and the RF output.
Page 461: Source High Band Operation
Source High Band Operation The high band frequency range is 16 MHz to 3.0 GHz or 16 MHz to 6.0 GHz with Option 006. These frequencies are generated in subsweeps by phase-locking the 1. A signal (HI OUT) is generated VCO in by the fractional-N VCQ.
Page 462 7. A synthesized is phase locked to the synthesizer at the the synthesizer. When the source start frequency, the synthesizer starts to phase locked loop forces sweep. The the source to track the synthesizer, maintaining a constant 1 MHz 1st IF signal.
Page 463 source output (bfEz) 33.0 to 60.6 31.5 to 58.8 option 666...
Page 464: Source Operation In Other Modes/Features
Source Operation in other Modes/Features Resides the normal network analyzer mode, the HP 87533 has extra modes and features to make additional types of measurements The following describes the key differences in how the analyzer operates to achieve these new...
Page 465: External Source Mode
F R A C T I O N A L - N REFERENCE SOURCE vcxo 3 . 0 t o REFERENCE HARMONIC 1 . 0 0 0 0 . 5 0 0 0 . 3 3 3 Figure 12-6. Harmonic Analysis External Source Mode In external source mode, the analyzer phase locks its receiver to an external signal source.
Page 466 compared to the 1.000 MHz reference, and used to generate a tuning voltage as usual. However, the tuning voltage controls the VCO to lock on to the external source, keeping the 1st IF at exactly 1.000 MHz. The analyzer normally goes through a pretune-acquire-track sequence to achieve phase lock.
Page 467: Tuned Receiver Mode
Tuned Receiver Mode In tuned receiver mode, the analyzer is a synthesized, swept, narrow-band receiver only. The external signal source must be synthesized and reference-locked to the analyzer. To achieve this, the analyzer’s source and phase lock circuits are completely unused.
Page 468: Signal Separation
Signal Separation The analyzer’s test port couplers are used to separate signals incident to, reflected from, and transmitted from the device under test. Each test port coupler has a coupling coefficient factor of 16 dD. The LED front panel board indicates whether the source power is incident on the analyzer’s test port 1 or test port 2.
Page 469 C O U P L E R T R A N S F E R SW I TCH PORT 1 FROM A3 PORT 2 F R O N T P A N E L Figure 12-9. SimplifM Block Diagram of the Built-in ‘Ilest Set Theory of Operation...
Page 470: Receiver Theory
Receiver Theory The receiver functional group consists of the following assemblies: These assemblies combine with the A9 CPU (described in Digital Control Theory) to measure and process input signals into digital information for display on the analyzer. Figure 12-10 is a simplijied block diagram of the receiver functional group.
Page 471 The A4, A5, and A6 sampler/mixers all down-convert the RF input signals to fixed 4 kHz 2nd IF signals with amplitude and phase corresponding to the RF’ input. The A5 and A6 sampler/mixer assemblies both include an 8 dB gain preamplifier in front of the sampler.
Page 472 The Mixer Circuit The 1st IF and the 2nd Lo are combined in the mixer circuit. The resulting difference frequency (the 2nd IF) is a constant 4 kHz in both bands, as 4.0 HI!4 0.014 to 0.304 MHZ 0.010 to 0.300 MHZ Super Low 4.0 HI2 0.304 to 16.004 MI-h...
Page 473 Replaceable Parts This chapter contains information for ordering replacement parts for the HP 8753E network analyzer. Replaceable parts include the following: major assemblies chassis hardware In general, parts of major assemblies are not listed. Refer to lhble 13-1 at the back of this chapter to help interpret part descriptions in the replaceable parts lists that follow.
Page 474 Replacing an Assembly The following steps show the sequence to replace an assembly in an HP 8753E network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 475 Rebuilt-Exchange Assemblies Under the rebuilt-exchange assembly program, certain factory-repaired and tested modules (assemblies) are available on a trade-in basis These assemblies are offered for lower cost than a new assembly, but meet all factory specifications required of a new assembly. The defective assembly must be returned for credit under the terms of the rebuilt-exchange assembly program.
Page 476 , t h e b o x c o n t a i n s : module on hand? E x c h a n g e a s s e m b l y f a i l u r e repor to HP. Return address label Order restored-exchange m o d u l e f r o m H P .
Page 477 Replaceable Part Listings The following pages list the replacement part numbers and descriptions for the HP 8753E Network Analyzer. Illustrations with reference designators are provided to help identify and locate the part needed. The parts lists are organized into the following categories:...
Page 478 Ref. option NOT SHOWN (see -Front Psnel Assembly, Inside”) NOT SHOWN (see ‘Front Panel Aeanbly, Inside”) ASSY-SOURCE 6 GIiz (REBUIIT-RXCBANGE) The following parts apply to instruments with serial numbem gnster than US37S9xxxx or W, and to instruments having all three samplers replaced. 1 ASSY-SAMPLER R (REBUIIZEXCBANGE: 08753-69007) The following parta apply to instruments with serial numbers in the form of US37SOxxxx or Jp3802mmr.
Page 479 Replaceable Parts 13-7...
Page 480 Major Assemblies, Bottom Description CPU REPAIR KlT (REBUIfX-EXCBANGE) CPU FAN 60874008 6087-7007 60874007 6087-7008 60874008 BD AESY-m m INTEFtFACE 1 Remove the backing from the heat transfer area before re-assembly.
Page 481 Replaceable Parts 13-8...
Page 482 Cables, Tlbp Ref. CABLE TIE (16Wl to CHAWIS) (part of A16) TEST PORT 2 COUPLER (A22) to SAMPLEBB (A6) SAMPLE%A (A5) to PUME GENERATUE (A7) SAMPLER-B (A6) to PUISE QENERATOR (A7) PHASE ILICK (AlLIl) to SAMPLEEM (A4) MOTHERBOARD (A17Jll) to CPU (AOJS) Bundle (n is the number of wires in the bundle) Cable (n is the number of wires in the ribbon) Flexible C!eax Cable...
Page 483 Cables, lbp Replaceable Parts 13.11...
Page 484 Cables, Bottom Number SOURCE AWY (ASW4) to TRANSFER 8WI’DX (k&i) LED (A23Jl) to TmT SFX IIwElzFACE (A26J2) Wire Bundle (m b the number of wires in the bundle) Ribbon Cable (n is the number of wires in the ribbon) Semi-Rigid Coax Cable 13-12 Replawabls Partr...
Page 485 Cables, Bottom i l l Replaceable Parts 13-13...
Page 486 Cables, Front Number (part. of BPGl) FP INTEBFACE (A2Jl) to MUMEBB ABD (A17Jl) Wire Bundle (n b the number of wire8 in the bundle) Bibbon Cable (n is the number of wires in the ribbon) Semi-Bigid Cvax Cable 13-14 Replaceable Parts...
Page 488 Cables, Rear Bof. (part of Bl) FAN (Bl) to MOTHERBO ARD (A17J6) RP JNTERFACE (A16Jll) to RP (POBT 2 FUSB) Wire Bundle ( Ribbon Cable (n is the number of wirea in the ribbon) Flexible Coax Cable Replaceable Parts...
Page 489 Cables, Rear...
Page 490 Cables, Source Ref. Type* Description Number SCURCE ASSY (A3) to AlTENUA’ItIR (ASA6) Wire Bundle (n ia the number of wirea in the bundle) 13-18 Replaceable Parts...
Page 491 Cables, Source Replaceable Parts...
Page 492 Front Panel Assembly, Outside Number OVERLAY, UPPER FRONT PANEL 1 Comes with gasket, upper and lower overlays.
Page 493 Front Panel Assembly, Outside...
Page 494 Front Panel Assembly, Inside DISPLAY HOLD DOWN DISPLAY LAMP DISPLAY GLASS 0515-0306 SCREW SMM 3.0 14cWPNTx CABLE CLG SCREW SrdM 3.0 8cwPNTx CABLE ASSY, PBOBE POWEFt NUT, HEX 3/E32 SCREW, TAFTING BD ASSY-F’RONT PANEL BD ABSY-FXONT PANEL INTEBF’ACE 08753-60311...
Page 495 Front Panel Assembly, Inside Replaceable...
Page 496 Rear Panel Assembly Ref. Number 3 (AM) BD ASSY-BEAB PANEL INTEBFACE (A16) ASSY-FAN WASHER LK .l&MlDlO NUT STDF .327L 632 SCREW SbfM35Xl6 CWFWTX FAN GUABD HOLE PLUG WASHER LK .472ID NUT BEX 15/32-32 FUSE 2110-0047 FUSE CAP HOLE PLUGS 13-24 ReplaceableParts...
Page 497 Rear Panel Assembly e s ) P A R T O F F A N...
Page 498 Rear Panel Assembly, Option lD6 Ref. Number...
Page 499 Rear Panel Assembly, Option lD5...
Page 500 Hardware, lbp 08753-40014 08753-00107 SCREW-MACHINE M3.6xlOCW-PN-TX 08753-00113 0515-0374...
Page 501 Hardware, lbp 12 Places) Replaceable Parts 13-29...
Page 502 Hardware, Bottom Number 0515-1400 ~ M3.6x8PcwLTx SCREW-MACHINE 1330 Replawable Parts...
Page 503 ( 3 P l a c e s ) ( 3 P l a c e s ) Replaceable Parts...
Page 504 Hardware, Front Ref. 1332 Replaceable Parts...
Page 505 Hardware, Front Replaceable Parts 1333...
Page 506 Hardware, Test Set Deck Description SHOULDER SCREW 08753-40013 S C R E W - ~ M3.Ox 6 FGFTrTX SCREW-- M3.0~ 6 CW-FN-TX SCREW-MACHINE &43.0x26 CW-PN-TX 13-34 Replaceable Parts...
Page 507 Hardware, ‘l&t Deck Replaceable Partr 13-35...
Page 508 Hardware, Disk Drive Support 08720-00021 S C R E W S Your analyzer may use either pin 08720-00021 or p/n 08753-00152. Analyzers manufactured prior to February 1999 use p/n 0872040021. kuxlyzers manufactured after February 1900, or that have been repaired or upgraded with Service Kit p/n 08720-40190, use p/n 08753-40152. Contact Hewlett-Packard if you need help identifying replacement parts for your analyzer.
Page 509 Hardware, Disk Drive Support Replaceable Parts 13-37...
Page 510 Hardware, Memory Deck 0515-0468 1338 Replaceable Parts...
Page 511 Replaceable Partr 1339...
Page 512 Hardware, Preregulator Ref. Number FUSE 3A 260V NON-TIblF, DELAY (CSAAJL) 0515-1400 SCREW-MACHINE M&6x8 CW-FLTX 1340...
Page 513 Hardware, Preregulator 1341...
Page 514 Chassis parts, Outside Description Ref. 08720-00078 0515-1402 SCREW SMM 5.0 10 PCFIZ'X 6041-0186 6180-8600 1342...
Page 515 Chassis parts, Outside Places) Replaceable Parts 1343...
Page 516 Chassis Parts, Inside Number FRONTPANELFRAME REARFRAME 0515-1400 1344...
Page 517 Chassis Parts, Inside (16 Places) 1345...
Page 518 Miscellaneous CABLE ASSEMBIX Documentation 1346 Replaceable Parts...
Page 519 Description Protective Cape for Conneetor~ 2110-0424 ADJUSTABLE ANTWSTICWRISFBTRAP Replaceable Parts 1347...
Page 520 V ..........volt front panel ........wire formed frequency ........hexagonal HP-IB ....Hewlett-Packard interface bun 006......6QHzperformanc e 010 ........time domain ID ........inside diameter 011 ........w/o test set 076 ........76ohmteat= t ......llghbemitting diode...
Page 521 Assembly Replacement and Post-Repair Procedures This chapter contains procedures for removing and replacing the major assemblies of the HP 8753E network analyzer. A table showing the corresponding post-repair procedures for each replaced assembly is located at the end of this chapter.
Page 522 Replacing an Assembly The following steps show the sequence to replace an assembly in an HP 8753E Network Analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 523 Procedures described in this chapter The following pages describe assembly replacement procedures for the HP 8753E assemblies listed below: Covers (Al, A2) Display, Display Lamp, and Inverter Assemblies Rear Panel Assembly Card Cage Boards AS, AlO, All, A12, A13, Al4...
Page 524 Line Fuse Tools Required small slot screwdriver Removal For continued protection against fire hazard, replace fuse Warning only with same type and rating (3 A 250 VAC). The use of 1. Disconnect the power cord. 2. Use a small slot screwdriver to pry open the fuse holder. Replace the failed fuse with a 3 AF 250 V F fuse.
Page 525 Line Fuse F U S E I N U S E ‘ I N S E R T S C R E W D R I V E R , P R Y O P E N Assembly Replacement and Post-Repair Procedures...
Page 526 Covers Tools Required Removing the top cover 1. Remove both upper rear feet (item 1) by loosening the attaching screws (item 2). 2. Loosen the top cover screw (item 3). Slide cover off. Removing the side covers 1. Remove the top cover. 2.
Page 527 Covers...
Page 528 Front Panel Assembly small slot screwdriver ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord. 2. Remove the front bottom feet (item 1). 3. Remove all of the RF cables that are attached to the front panel (item 2). 4.
Page 529 14-9...
Page 530 Front Panel Keyboard and Interface Assemblies small slot screwdriver ESD (electrostatic discharge) grounding wrist strap Removal 1. Remove the front panel assembly from the analyzer (refer to “Front Panel Assembly” in this chapter). all cables from the front panel interface board (items 1, 2, 3, 4, 6, and 7).
Page 531 Front Panel Keyboard and Interface Assemblies...
Page 532 Display Lamp and Inverter Assemblies small slot screwdriver ESD (electrostatic discharge) grounding wrist strap Removal 1. Remove the front panel assembly (refer to “Front Panel Assembly” in this chapter). 2. Disconnect the cables (items 2, 3 and 4) from the Al assembly. 3.
Page 533 Replacement 1. Reverse the order of the removal procedure. 2. Be sure to route ribbon cable 2 through the cable clamp on the A2 assembly and the LCD mounting plate (item 7). Be sure that cables are plugged in square and correct. Failure to Caution do so will result in serious component damage.
Page 534 (3 Places) Post-Repair Procedures...
Page 535 Rear Panel Assembly ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord and remove the top (item 1) and bottom covers (refer to “Covers” in this chapter). 2. Remove the four rear standoffs (item 2). 3. If the anaiyzer has option lD5, remove the BNC jumper from the high stability frequency reference (item 3).
Page 536 10. Pull the rear panel away from the frame. Disconnect the ribbon cable (item 11) from the motherboard connector, pressing down and out on the connector locks. Disconnect the wiring harness (item 12) from the motherboard. Replacement 1. Reverse the order of the removal procedure. 12 on Top) Assembly Replacement and Post-Repair Procedures...
Page 537 Rear Panel Assembly Assembly Replacement and Post-Repair Procedures...
Page 538 Required Tools ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord and remove the top and bottom covers (refer to “Covers” in this chapter). 2. If the analyzer has option lD5, remove the high-stabiiity frequency reference jumper (item 1). 3.
Page 539 (Opt ID5 only) only)
Page 540 ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord and remove the top cover (refer to “Covers” in this chapter). 2. Remove the source bracket (item 1) by removing four screws (It might be necessary to disconnect a flexible cable from the B sampler.) Disconnect the flexible cable W26.
Page 542 Replacement 1. Check the connector pins on the motherboard before reinstallation. 2. Slide the edges of the sheet metal partition (item 4) into the guides at the sides of the source compartment. Press down on the module to ensure that it is well seated in the motherboard connector.
Page 543 Needle-nose pliers ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord and remove the top cover (refer to “Covers” in this chapter). 2. To remove the B sampler (A6), you must remove the source bracket (item 1). 3.
Page 544 A l l Assembly Replacement and Post-Repair Procedures...
Page 545 Replacement 1. Check the connector pins on the motherboard before reinstallation. 2. Reverse the order of the removal procedure. Note When reconnecting semirigid cables, it is recommended that the connections be torqued to 10 in-lb. Be sure to route W8 and W9 as shown. No excess wire should be hanging in the All and Al4 board slots.
Page 546 Tools Required ESD (electrostatic discharge) grounding wrist strap Removal 1. DiscOMect the power cord and remove the top cover (refer to “Covers” in this chapter). 2. Remove the screw from the pc board stabilizer and remove the stabilizer. 3. Lift the two extractors located at each end of the board. Lift the board from the card cage slot, just enough to disconnect any flexible cables that may be connected to it.
Page 547 AS, AlO, All, A12, A13, Al4 Caxd Cage Boards R E A R P A N E L E X T REFi Assembly Replacement and Post-Repair Procedures...
Page 548 Removal 1. Disconnect the power cord. 2. Remove the top and bottom covers (refer to “Covers” in this chapter). 3. Remove the rear panel assembly, following steps 4 through 6 of “Rear Panel Assembly. n 4. Turn the analyzer upside down. 5.
Page 549 14-33 Assembly Replacement and Post-Repair Procedures...
Page 550 Assembly Replasemeat and Post-Repair Procedures...
Page 551 Tools Required ESD (electrostatic discharge) grounding wrist strap soldering iron with associated soldering tools Removal 1. Remove the A9 CPU/PIG board (refer to “A9 CPU Board” in this chapter). 2. Unsolder and remove AOBTl from the A9 CPU/PIG board. Battery A9BTl contains lithium. Do not incinerate or puncture this battery.
Page 552 II II 14-37...
Page 553 Tools Required ESD (electrostatic discharge) grounding wrist strap Removal 1. Remove the rear panel (refer to “Rear Panel Assembly” in this chapter). 2. Remove the two remaining screws from the top of the rear frame. 3. Disconnect the wire bundle (A15Wl) from A&J2 and A17J3. 4.
Page 554 1 4 4 8 Assembly Replacement and Post-Repair Procedures...
Page 555 Tools Required hex-key driver ESD (electrostatic discharge) grounding wrist strap Removal lb remove the Al7 motherboard assembly only, perform the following steps to remove all assemblies and cables that connect to the motherboard. 1. Disconnect the power cord and remove the top, bottom, and side covers (refer to “Covers”...
Page 556 9. Remove the source assembly (refer to “A3 Source Assembly” in this chapter). 10. Remove the samplers and pulse generator (refer to “A4, A5, A6 Samplers and A7 Pulse Generator” in this chapter). 11. Remove the card cage boards (refer to “A& AlO, All, A12, A13, Al4 Card Cage Boards”...
Page 557 A 17 Motherboard Assembly with the following step: 13. Referring to the figure on the following page, remove the front frame (item 1) and rear frame (item 6) by removing the attaching screws (item 7). At this point, only the motherboard/card cage assembly should remain. This whole assembly is replaceable.
Page 558 A 17 Motherboard Assembly Replacement 1. Reverse the order of the removal procedure. 1443...
Page 559 ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord. 2. Remove the top cover (refer to “Covers” in this chapter) and front panel (refer to “Front Panel Assembly” in this chapter.) 3. Remove the six screws (item 1) from the GSP cover (item 2) and lift off. 4.
Page 560 1 4 4 6...
Page 561 Tools Required small slot screwdriver ESD (electrostatic discharge) grounding wrist strap Required Diskette Prepare the new disk drive assembly for installation in the analyzer. The Installation Note included in the service kit provides details for this procedure. 1. Disconnect the power cord and remove the top, bottom, and left side-covers (refer to “Covers”...
Page 562 Assembly Replacement and Post-Repair Procedures 1447...
Page 563 Install the replacement disk drive. 1. Connect the existing ribbon cable to the replacement disk drive. Note Make sure that the disk drive connector-contacts touch the ribbon cable contact areas (the ribbon-cable contact areas must face the contacts in the disk drive connector). Also assure that the connector is properly locked.
Page 564 c. Center the disk drive in the opening. d. Re-tighten all three screws. Reinstall the covers. 1. Reinstall the remaining top front-panel screw in the left corner. 2. Reinstall the trim strip. 3. Reinstall the covers. If needed, refer to “Covers” in this chapter for help in performing this task.
Page 565 small slot screwdriver ESD (electrostatic discharge) grounding wrist strap Removal the power cord and remove the bottom cover (refer to “Covers” in this chapter). 2. Disconnect the small bias wire from the test set interface board (A25). For coupler A2 1 disconnect the gray wire (A2 1 W 1). For coupler A22 disconnect the gray wire (A22Wl).
Page 566 Assembly Replacement and Post-Repair Procedures...
Page 567 Tools Required small slot screwdriver ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord and remove the bottom cover (refer to “Covers” in this chapter). 2. Remove the front panel (refer to “Front Panel Assembly” in this chapter). 3.
Page 568 I II II 14-53...
Page 569 ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord and remove the bottom cover (refer to “Covers” in this chapter). 2. Disconnect A24Wl from 53 on the test set interface board (A25). 3. Disconnect the three semirigid cables (Wl, W31, and W32) from the transfer Remove the two screws (item 1) that secure the transfer switch.
Page 570 Assembly Replasement and Post-Repair Prosedures...
Page 571 ESD (electrostatic discharge) grounding wrist strap Removal the power cord and remove the bottom cover (refer to “Covers” in this chapter). 2. Disconnect all cables and wires (A21W1, A22W1, W33, and W34) from the test set interface board (A25). 3. Remove the five screws (item 1) that secure the test set interface board. Replacement 1.
Page 572 14-57...
Page 573 Assembly ESD (electrostatic discharge) grounding wrist strap Removal 1. Remove the rear panel (refer to “Rear Panel Assembly” in this chapter). 2. Disconnect W30 from the high stability frequency reference board (A26). 3. Remove the BNC connector nut and washer from the u 10 MI-Ix PRECISION REFERENCE”...
Page 574 OUTSIDE INSIDE Assembly Replacement and Post-Repair Procedures...
Page 575 hex-key driver ESD (electrostatic discharge) grounding wrist strap Removal 1. Remove the rear panel (refer to “Rear 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.
Page 576 Assembly Replacement and Pest-Repair Procedures...
Page 577 Post-Repair Procedures for HP 8753E The following table lists the additional service procedures which you must perform to ensure that the instrument is working correctly, following the replacement of an assembly. These procedures can be located in either Chapter 2 or Chapter 3.
Page 578 Correction cons~ts (oh. 8) Operator’s Check service T&t, 21 CC Retrieval Serial Number CC (Test 55) Option Number CC (!Ibst 66) EEPROM Backup Load Fhmware and Accuracy Serial Number CC (Test 66) Option Number CC (‘Rx& 60) Linearity Pretune Default CC (lbt 46) Cal Kit Default (Test 57) Source Pretune CC (!Ibst 48) RF Output Power Cc (Tbst 47)
Page 579 Fractional-N Spur and FM Sideband Fractional-N Frequency Range Fractional-N Spur Avoidance EEPROM Backup Disk None None Observation of Display None None Observation of Display none none Sampler Maguitude and Phase CC (‘l&t 53) ‘l&t Port Frequency Response none Frequency Acauacy ment Frequency Reference (Option lD5) performance is typical.
Page 580 Safety and Licensing Notice The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
Page 581 Warranty material and workmanship for a period of three years from date of shipment. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard.
Page 582 Hewlett-Packard Sales and Service Oifices Instrument Support Center Hewlett-Packard France Hewlett-Packard GmbH 160, Route du NanM’Avril 1 Avenue Du Canada Hewlett-Packard Straae Zone D’Activite De Courtaboeuf 61362 F&d Hombug v.d.H (4122) 7S9.8111 France (49 6172) 16-o Great Britain Hewlett-Packard Ltd. E&dale Rand, Winnersh Triangle Hewlett-Packard Aust&ia Ltd.
Page 583 Shipment for Service If you are sending the instrument to Hewlett-Packard for service, ship the analyzer 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 antistatic packaging materials.
Page 584 Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this Caution Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, would result in damage to or destruction of the instrument.
Page 585 Safety Considerations Note This instrument has been designed and tested in accordance with IEC Publication 1010, Safety Requirements for Electronics Measuring Apparatus, and has been supplied in a safe condition. This instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the instrument in a safe condition.
Page 586 Servicing No operator serviceable parts inside. Refer servicing to remove covers. These servicing instructions are for use by qualified personnel only. ‘Ib avoid electrical shock, do not perform any servicing unless you are qualified to do so. The opening of covers or removal of parts is likely to W a r n i n g expose dangerous voltages.
Page 587 General Warning mains before cleaning. Use dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally. If this product is not used as specified, the protection W a r n i n g provided by the equipment could be impaired.
Page 588 Compliance with German FFZ Emissions Requirements This network analyzer complies with German FIZ 526/527 Radiated Emissions and Conducted Emission requirements. Compliance with German Noise Requirements This is to declare that this instrument is in conformance with the German Regulation on Noise Declaration for Machines (Laermangabe nach der Maschinenlaernuerordung -3.
Page 589 12-14 4 kHz signal check, 8-11 4 MHz reference signal, 7-20 4 MHZ REF’ signal check, 8-7 source, 12-14 theory of operation, 12-6 source, 12-14 60 MHz HI OUT Waveform from 7-31 check, 7-29 8753E theory of operation, 12-1 Index-l...
Page 590 2-24 super low band theory, 12-15 adapters, l-4 theory of operation, 12-2, 12-14 tuned receiver mode, 12-25 ADC Lin., lo-10 ADC main, lo-23 ADC offset correction constants adjustment, 3-17 ADC Ofs Cot, 10-13 ADD, 10-6 addresses for HP-IB systems, 46...
Page 591 adjustment ALL INT, 10-7 Alter and Normal switch position ADC offset correction constants adjustment, 3-5 (test 52), 3-17 amplifier (IF’) adjustment, 3-16 analog bus correction constants analog bus, lo-22 (test 46), 3-9 ANALOG BUS, lo-25 cavity oscillator frequency analog bus check of reference correction constants (test 54), frequencies, 7-13 3-28...
Page 592 12-1 analyzer block diagram, 419 covers, 146 analyzer HP-H3 address, 46 display, 14-12 analyzer options available, l-7 display lamp, 1412 analyzer (spectrum), l-3 front panel, 148 analyzer verification, 2- 1 front panel interface, 14-10 antistatic wrist strap, l-4...
Page 593 transfer switch, 12-26 ADC offset (test 52), 3-17 analog bus (test 46), 3-9 analog, lo-22 cavity oscillator frequency (test bus nodes, 19-26 IF amplifier (test 51), 3-16 initialize EEPROMs (test 58), 3-37 cable inspection, 6-16 option numbers (test 56), 3-36 cables, l-4 retrieve correction constant data bottom view, 13-12...
Page 594 components related to specific error terms, 9-3 connection techniques, l-5 A and B inputs, 8-4 connector A and B input traces, 4-16 care of, l-5 accessories error messages, 4-18 CONTINUE TEST, 10-5 CPU control, 6-4 digital control, 4-11 controller troubleshooting, 4-8 disk drive, 4-7 conventions for symbols, 19-48 fan voltages, 5-22...
Page 595 7-7 disk drive check, 4-7 digital control group, 6-3 disk drive (externai) HP-ID address, diagram of HP 87533, 419 diagram of power supply, 5-25 disk drive replacement, 14-46 DIF Control, 10-9 disk (fIoppy), l-3...
Page 596 display IF ampiifier correction constants adjustment, 3-16 power, 12-8 minimum R channel level, 2-31 displayed spurs with a biter, 3-30 RF output power correction display intensity, 6-7 constants adjustment, 3-11 display tests, 10-3, 10-15 sampler magnitude adjustment, DISPLAY TESTS, 10-5 3-18 DIV FRAC N, lo-25 source spur avoidance tracking...
Page 597 INSUFFICIENT MEMORY, PWR PWR MTR: NOT ON/CONNECTED OR WRONG ADDRS, lo-59 NO CALIBRATION CURRENTLY IN SAVE FAILED. INSUFFICIENT PROGRESS, lo-53 MEMORY, lo-59 NO IF FOUND: CHECK R INPUT SELF TEST #II FAILED, lo-59 LEVEL, lo-54 SOURCE POWER TURNED OFF, NO PHASE LOCK: CHECK R INPUT RESET UNDER POWER MENU, LEVEL, 19-54 NO SPACE FOR NEW CAL.
Page 598 6-14 phase lock error, 7-4 receiver, 8-3 Adjustment Sequence, 3-62 RF power from source, 7-3 sideband a@stment, 3-54 HP-IB, 6-19 Sideband Adjustment Sequence, air flow detector, 12-7 3-62 variable fan circuit, 12-7 frequency accuracy adjustment, 3-48 fan speeds, 5-22...
Page 599 adjust fractional-N frequency range, good trace display, 8-5 3 - 4 5 adjust fractional-N spur avoidance green LED on Al5 and FM sideband, 3-54 power supply shutdown, 12-6 green LEDs on A8, 12-7 adjust frequency accuracy, 3-48 adjust hig.hAow band transition, digital control, 12-12 3 - 5 2 adjust IF ampiifIer correction...
Page 600 10-48 automatically, 2-8 isolation (crosstaik, EXF and EXR), HP 8753E adhistments, 3-l 11-14 HP 8753E block diagram, 4-19 HP-IB addresses, 46 HP-IB cable, l-4 key codes, 6-14 key faihne identification, 6-14 HP-IB mnemonic for service, 10-l...
Page 601 bottom view, 13-8 verification kit 7 mm, l-3 part numbers, 13-6-8 rebuilt-exchange, 13-3 top view, 13-6 LED front panel, 12-26 measurement calibration coefficients, L ENREF line, 7-23 L I-II3 and L LB Lines, 7-24 measurement calibration procedure, 11-3 mechanical adjustment sequences, linearity and range of power test, 3-62 2-27...
Page 602 DISK: not on, not connected, wrong PROBE POWER SHUT DOWN!, addrs, lo-52 DISK READ/WRITE ERROR, lo-53 PWR MTR: NOT ON/CONNECTED error, 10-50 OR WRONG ADDRS, lo-59 SAVE FAILED. INSUFFICIENT NO CALIBRATION CURRENTLY IN MEMORY, lo-59 PROGRESS, lo-53 SELF TEST #n FAILED, lo-59 NO IF FOUND: CHECK R INPUT SOURCE POWER TURNED OFF, LEVEL, lo-54...
Page 603 NO PHASE LOCK CHECK R INPUT LEVEL, 7-4,7-38, handles, l-8 10-54 Normal and Alter switch position reference, l-7 adjustment, 3-5 descriptions of, 13-48 NO SPACE FOR NEW CAL. CLEAR options available, l-7 REGISTERS, 19-54 osciiioscope, l-3 NOT ALLOWED DURING POWER oscilloscope check of reference METER CAL, lo-55 frequencies, 7-15...
Page 604 12-15 POWER LOSS, lo-6 phase lock (All) check, 7-35 power meter (HP-IB), l-3 phase lock and A3 source check, 7-8 power meter HP-IB address, 46 PHASE LOCK CAL FAILED, 7-4, POWER METER INVALID, lo-57 7-38, lo-56 POWER METER NOT SETTLED,...
Page 605 EEPROM backup disk, error, 19-58 3-40 not handshaking, 19-58 not on, not connected, wrong addrs, constants (l&t 47), 3-11 Sampler Magnitude and Phase printer HP-IB address, 46 Correction Constants (Test 53), 3-18 probe power, 12-8 Sequences for Mechanical probe (photometer), l-3...
Page 606 test port output power range and REP (4 MHz) signal check, 8-7 linearity, 2-27 reference Unprotected Hardware Option source, 12-14 Numbers Correction Constants, reference, A12, 10-40 reference (A12) check, 7-13 3 - 6 0 verify an analyzer system reference frequencies check using (automated), 2-8 analog bus, 7-13 pulse generator...
Page 607 hardware, test set deck, 13-34 search for spurs without a filter, 3-31 hardware, top, 13-28 SEGMENT, 10-6 major assemblies, bottom, 13-8 selector switch check, 5-7 major assemblies, top, 13-6 self diagnose softkey, 10-7 self-test, 4-3 SELF TEST #n FAILED, lo-59 option descriptions, 13-48 ordering, 13-3 sensor (power), l-3...
Page 608 setup built-in test set, 12-26 cavity oscillator frequency theory of operation, 12-26 correction constant routine, signals required for Al0 assembly 3-29 operation, 8-8 external source mode frequency SLOPE DAC, lo-19 range, 2-22 softkeys, 10-2 fractional-N spur avoidance and source All phase lock, 12-15 frequency accuracy adhrstment, 3-49 insertion loss measurement, 3-20...
Page 609 SOURCE POWER TURNED OFF, SRC tune mode frequency output, RESET UNDER POWER MENU, SRC tune mode phase locked output source pretune correction constants compared to open loop, 7-9 adjustment, 3-10 SRC tune mode waveform integrity, source prettme default correction constants adjustment, 3-8 SRC TUNE ON OFF, lo-19 source spur avoidance tracking stable HI OUT signal in PRACN TUNE...
Page 610 test 48, 3-10, 10-13 test 50, 10-13 test 51, 3-16, 10-13 test 52, 3-17, 10-13 test 53, 3-18, 10-13 test 54, 3-28, lo-13 test 55, 3-34, 10-13 test patterns, 10-3 test 56, 3-36, 10-14 test port connector inspection, 9-3 test 57, 10-14 test port couplers, 12-26 test 58, 3-37, 10-14 test port input noise floor level, 2-37...
Page 611 theory of operation, 12-3 TROUBLE! CHECK SETUP AND transfer switch, 12-26 START OVER, lo-60 test set interface, 12-26 troubleshooting tests menu, 10-3 test status terms, 104 8-14 theory of operation, 12-1 examination, 8-8 All phase lock, 7-35 All phase lock and A3 source check, 7-8 7-29 air flow detector, 12-7...
Page 612 YO coil drive check with analog post regulator, 12-7 bus, 7-11 voltages troubleshooting power supply, 5-l troubleshooting source group appendix, 7-38 fan, 5-22 two-port error-correction procedure, front panel probe power, 5-19 11-3 YO- and YO+ coil drive voltage differences with& SOURCE uncorrected performance, 1 l-9 voltages for post regulator, 5-5 unprotected hardware option numbers...

HP 8753E Service Manual

Service Equipment and Analyzer Options

System Veriikation and Performance 'Lksts

System Trace Noise for B/R Magnitude from 3 Ghz to 6 Ghz

Performance 'Lkst Record for Analyzers with a Frequency Range of 30 Khz to 3 Ghz

Performance 'L&T Record

3 Adjustments Andcmmction Constants

A9 Switch Positions

Unprotected Hardware Option Numbers Correction Constants

4 Staxttroubleshooting here

Verify Intemai Tests Passed

Accessories

Power Supply Troubleshooting

Digital Control Troubleshooting

Source Troubleshooting

Receiver Troubleshooting

Accessories Troubleshooting

Service Key Menus and Error Messages

Error Lkrms

Quick Links

Troubleshooting

Related Manuals for HP 8753E

Summary of Contents for HP 8753E