Page 1 Service Guide Agilent Technologies 8719D/20D/22D Network Analyzers Manufacturing Part Number: 08720-90292 Printed in USA Print Date: February 1999 Supersedes: June 1998 © Agilent Technologies, Inc. 1996 - 1999...
Page 2 This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett-Packard's former test and measurement, semiconductor products and chemical analysis businesses are now part of Agilent Technologies. To reduce potential confusion, the only change to product numbers and names has been in the company name prefix: where a product number/name was HP XXXX the current name/number is now Agilent XXXX.
Page 3 Printing Copies of Documentation from the Web To print copies of documentation from the Web, download the PDF file from the Agilent web site: • Go to http://www.agilent.com. • Enter the document’s part number (located on the title page) in the Quick Search box. •...
Page 4 Contacting Agilent This information supersedes all prior HP contact information. Online assistance: www.agilent.com/find/assist Americas Brazil Canada Mexico United States (tel) 1 800 254 2440 (tel) +1 877 894 4414 (tel) (+55) 11 3351 7012 (tel) 800 829 4444 (fax) 1 800 254 4222 (fax) +1 303 662 3369 (fax) (+55) 11 3351 7024 (alt) (+1) 303 662 3998...
Page 5 Service Guide Network Analyzer...
Page 6 HP part number: 08720-90292 Supersedes June 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 fltness for a particular purpose.
Page 7 Network Analyzer Documentation Set The Instalhtion and Quick Start Guide familiarizes you with the network analyzer’s front and rear panels, electrical and environmental operating requirementq as well as procedure8 for of the The UaeFs Gpide shows how to make m easurementq explains commonly-used features, and tells you how to get the most The Quick Reference Guide providea a summary of all available user...
Page 8: Table Of Contents
1. Service Equipment and Analyzer Options ... . Principles of Microwave Connector Care Analyzer Options Available ....Option lD5, High Stability F’requency Reference .
Page 9 ....Insertion Loss of Cables ....2-10 2-11 .
Page 10 3-15 Serial Number Correction Constants (l&t 49) ..3-16 ......3-17 Protected Option Numbers Correction Constants (Test 50) 3-18...
Page 11 4. Start Troubleshooting Here Assembly Replacement Sequence ....Having Your AnaIyzer Serviced ....Step 1.
Page 12 ....... . . Verify the Al5 Preregulator ....5-10 5-11 Check the Operating ‘&mperature...
Page 13 Swap Samplers to Check A64R Sampler....Check Open Loop Power (HP 8719D/2OD only) ..
Page 14 8. Receiver Troubleshooting Assembly Replacement Sequence ............
Page 15 Analog In Menu ......... PEEK/POKE Menu .
Page 16 12-6 ..12-7 Display Power ..... . . 12-7 Al Front Panel ..... . . 12-8 12-8 12-8...
Page 17 13. Replaceable Parts 13-2 Replacing an assembly ..... 13-3 Rebuilt-Exchange Assemblies ....
Page 18 1410 ......Replacement 1412 Display Lamp and Assembly ....1412 1412 .
Page 19 1434 lbols Required ......1434 Removal ......1434 LED Board Removal .
Page 20 1434 lbols Required ......1434 Removal 1434 ..... . . :::::::::: 1434 Replacement .
Page 21 ... . : : : : : : : Determining Expected System Performance ... Procedures ......Values lhble .
Page 22 2-6. Connector Repeatability Example ....2-14 2-7. National Institute of Standards and ‘khnology Traceability Path for HP 8719D/20D/22D System Calibration and Veri&ation 2-17 2-8. System Verification lkst Setup ....
Page 23 410. Apical Switch Repeatability Trace ......411. HP 8719D/20D/22D Overall Block Diagram ..
Page 24 9-1. Typical Return Loss Trace of a Good Cable 9-2. Typical Smith Chart Traces of Good short (a)‘and’Open @j : : : 10-2. Jumper Positions on the A7 CPU ....10-3.
Page 25 Required Tools......2-18 2-1. Supported System Configurations (HP 8719D/20D Only) 2-2. Supported System Configurations (HP 8722D Only) ..2-18 Power Values for Flatness l&t .
Page 26 11-4 ... . 11-2. HP 8719D/872OD Characteristics Without Error-Correction . . . 11-6 11-3. HP 8722D Characteristics Without Error-Correction ..11-7 12-16 12-1. Subsweep F’requencies 13-42 13-1.
Page 27: Service Equipment And Analyzer Options
This chapter contains information on the following topics: Service Test Equipment Principles of Microwave Connector Care Analyzer Options Service and Support Options Flat-blade screwdrivers-small, medium, and large Soldering iron Non-conductive and non-ferrous adjustment tool Needle-nose pliers Tweezers Antistatic work mat with wrist-strap Options 1-l...
Page 28 Keyboards with a mini-DIN amnedor are compatible with the HP P/N C1406-60016 adaptor. Service and Analyzer Options Equipment...
Page 29 Equipment Extension A , T A , T Coax cable BNC (m) to BNC (m), 6OQ HP 1OSOSA BP-IB C&lea BP Cable , !?d-inch 50ohm mm connectom mm connector BP cable 8et Type-N connectom HP 861S!zD/F mm connecton No mhlitute No mlmtltute mm VerMcatkm Bit.
Page 30: Principles Of Microwave Connector Care
Principles of Microwave Connector Care Proper connector care and connection techniques are critical for accurate, repeatable measurements Refer to the calibration kit documentation for connector care information. Prior to making connections to the network analyzer, carefully review the information about inspecting, cleaning and gaging connectors Having good connector care and connection techniques extends the life of these devices In addition, you obtain the most accurate measurements This type of information is typicaIly located in Chapter 3 of the calibration kit...
Page 31 Do Not Extend sleeve or connector nut Use plastic endcape during storage Do Not Use a damaged connector-ever Look for metal particles, scratches, and dents Do Not use isopropyl alcohol Get Iiqllid in@ plastic support beads Do Not cleanandzerothegagebeforeuse Do Not Apply bending force to amnection Twistorscrewanyconuection Tumonlytheconuectornut...
Page 32: Analyzer Options Available
Analyzer Options Available Option lD6, High Stability Frequency Reference Option lD5 offers f0.05 ppm temperature stability from 0 to 56 OC (referenced to 25 “C). Option 007, Mechanical Transfer Switch This option replaces the solid state transfer switch with a mechanical switch in the test set, providing the instrument with greater power handling capability.
Page 33: Option 012, Direct Access Receiver Configuration
Option 012, Direct Access Receiver Configuration This option provides front panel access to the A and B samplers This allows direct access to the sampler inputs for improved sensitivity in applications such as antenna tests, or for the insertion of attenuators between the couplers and samplers to allow measurements of up to 1 Watt (+ 30 dBm) at the input of the test ports Direct access to the B sampler provides a test configuration for the HP 8722D that gives increased dynamic range in the forward direction.
Page 34: Service And Support Options
HP warranty. Consult your local Hewlett-Packard sales engineer for availability of on-site service. The following service and support options are available at the time you purchase an HP 8719D/20D/22D network analyzer. Option WO8 This option converts the one year on-site warranty, that was automatically included with your analyzer, to a three year return to HP warranty.
Page 35: Optionw54
Option W34 This option provides three years of return to HP Standards Compliant Calibration. This type of calibration meets the ANSI/NCSL Z540-1-1994 standard. Option w64 This option provides five years of return to HP Standards Compliant Calibration. This type of calibration meets the ANSUNCSL Z540-1-1994 standard. If support was not purchased along with the analyzer, there are many repair and calibration options available from Hewlett-Packard’s support organization.
Page 36 How to Tlkst the Performance of Your Analyzer There are two different ways to verify the performance of your analyzer. One method meets ANSUNCSL Z!540-1-1994 standards, and the other method does not. To determine which type of verification you wish to perform, refer to the following descriptions and flow charts checks, system verifkation, and the performance tests without stopping to troubleshoot along the way.
Page 37: System Verification And Performance 'B&S
Instrument Verification Cycle The performance of the network analyzer should be verBed at least once per year. P R E L I M I N A R Y C H E C K S Y E S TROUBLESHOOTING P O S T R E P A I R M A T R I X ADJUSTMENT PROCEDURES System Verification and...
Page 38 P R E L I M I N A R Y C H E C K S I_- TROUBLESHOOTING P O S T R E P A I R M A T R I X ADJUSTMENT PROCEDURES TROUBLESHOOTING...
Page 39: Check The Temperature And Humidity
Sections in this Chapter Check the Temperature and Humidity Check the Analyzer Internal Tests Run the Operation Check Clean and Gage all Connectors Check the ‘I&t Port Cables System Verilkation Measurement Calibration Verification Device Measurements Interpreting the VeriIication Results Performance 1.
Page 40 Check the !Ibmperature and Humidity Required Equipment and ‘lbols (HP 8719D/2OD Only) Calibration Kit ........... . . HP 85052B/D RF Cable Set .
Page 41: Checktheanalyzerinternal'ksts
Check the Analyzer Internal ‘lbts This test is recommended to be done before the performauce tests, but is not required. These quick, automated internal checks may save time by indicating an instrument fault before time is invested doing performance tests Internal tests are described in the “Service Key Menus and Error Messages”...
Page 42 the first part of the check. If connectors are damaged, they must be repaired or replaced in order to prevent damage to the calibration and system with SMA connectors 1. Visually inspect all the connectors for any burrs, gold flakes, or places where the gold is worn.
Page 43: Returnlossofcables
Check the Test Port Cables The following series of cable tests (return loss, insertion loss, magnitude stability, phase stability, and connector repeatability) can be done to check the stability of a test port cable. These checks are not required, but are recommended to avoid spending a considerable amount of time on the verilhtion only to have a failure caused by the cables.
Page 45: Insertionlossofcables
1. Replace the load with a short. 2. lb measure the insertion loss of the cable over the entire specified band, press tracking and look for the worst case measurement. Rower holes >0.5 dl3 indicate a bad cable See F’igure 2-4 for example insertion loss measurements of a good cable.
Page 46: Magnitude And Phase Stability Of Cables
Magnitude and Phase Stability of Cables 1. To measure magnitude and phase stability, press the following keys on the analyzer: Connect a short at the end of the cable and then wait for the analyzer to average the measurement 64 times Hold the cable in a straight line, and press the following keys to normalize the displayed traces: 4.
Page 47: Cable Connector Repeatability
Place a marker on the largest deflection that goes above and below the reference line and is within the specified frequency range. See F’igure 2-5 for example plots of this measurement. In this S11 measurement, the displayed trace results from energy being propagated down the cable and reflected back from the short.
Page 48 3. To normalize the data trace press: 4. Disconnect and then reconnect the cable to the test port. Tighten the connection to the specilied torque for the connector type. Look at trace for spikes or modes 5. lb re-normalize the data trace of the reconnected cable press: (wd System Vwifhtion and...
Page 49 Repeat steps 4 and 5 at least 3 times to look for modes. Modes appear when a harmonic of the source fundamental frequency is able to propagate through the cable or connector. It is helpful to be able to plot the trace each thne to compare several connections If any mode appears each time the cable is connected and reconnected, measurement integrity will be affected.
Page 50: Verifcation Kit
System Verifhtion This system veri&ation consists of four separate procedures: 1. Equipment Initialization 2. Measurement Calibration 3. Verilkation Device Measurement Interpreting the VeriIIcation Results The procedures consist of equipment initialization, calibrating the analyzer with a calibration kit, measuring a set of characterized devices, and comparing the resultant measured data to the data and uncertainty hits supplied with the verification kit.
Page 51: Measurement Uncertainty
factory measured verification data, uncertainty limits of an HP 871OD/20D/22D system, and a printout of the factory uncertainties for the devices in the kit. Measurement Uncertainty Measurement uncertainty is defined as the sum of the residual systematic (repeatable) and random (non-repeatable) errors in the measurement system after accuracy enhancement.
Page 52 N A T I O N A L I N S T I T U T E O F STANDARDS TECHNOLOGY V E R I F I C A T I O N P R O D U C T I O N / SELECTED PROCESS CONTROL V E R I F I C A T I O N K I T...
Page 53: Required Equipment And Accessories
(for information on compatible printers, refer to the “Printing, Plotting, and Saving Measurement Results” chapter in the HP 87190/200/220 Network Analyzer User’s Guide.) Centronics Interface cable (1) Calibration Kit Supported System Configurations (HP 8719D/2OD Only) 3.5 mm Supported System Colons (HP 8722D Only) 2.4 mm 3.5 mm...
Page 54 plots in the cable checks (earlier in this chapter) that show the performance of good cables. It is highly recommended to periodically check test port cables to determine if they are good. If the system veriiication is performed with non-HP cables and fails but is then repeated with HP cables and passes, the non-HP cables are at fault.
Page 55: Equipment Initialization
Equipment Initialization Connect the equipment as shown in F’igure 2-8. Let the anaiyzer warm up for one hour. System Vezifkation lkst Setup While the equipment is warming up, review the “Connector Care Quick Reference” information in the “Service Equipment and Anaiyzer Options” chapter.
Page 56 If the interface on your printer is HP-US, 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 selected the printer port and the printer type correctly (refer to the for more information HP 8719DBODL?ZD Network Analyzer User’s Guide...
Page 57: Measurement Calibration
Measurement Calibration 12. Connect the open that is supplied in the calibration kit to reference test port 1. NETWORK ANALYZER ( m ) ( f ) CABLE 2 REFERENCE TEST REFERENCE TEST PORT 1 PORT 2 Figure 2-9. erections for Measurement CUbration Stadards 14.
Page 58 epending on which device is used. If loads calibration. 19. When the measurement is complete, press ~~~~~. Leave the load connected to the reference test port 1 cable. 20. When the analyzer finishes measuring the standard, connect the open that is supplied in the calibration kit to reference test port 2.
Page 59 N E T W O R K A N A L Y Z E R save the calibration into the analyzer internal memory. Step 33 is crucial to the correct recall of the calibration during Note be properly recalled. 34. When the analyzer iinishes saving the instrument state, press 2-24 System V&fiattion and...
Page 60: Connecting A Device
The following verification procedure is automated by the analyzer firmware For each veriikation device, the analyzer reads a Gle from the verifkation disk and sequentially measures the magnitude and phase for all four S-parameters The device number and test number for each verification device are as follows: 20 dB attenuatoT Press (G) In the active entry area on the display, the following will be displayed:...
Page 61 NETWORK ANALYZER Verification Device Connections The tests W-U begin. 41. If the record function is off (printout is not required), the program will each §-parameter measurement and you will need to press after each measurement. (There are eight measurements: magnitude and phase for each of the four S-parameters) Although the verification limits for all four Z&parameters are Note calculated, only the uncertainties aswchted with the items...
Page 62 Magnitude A i r l i n e S t e p p e d i m p e d a n c e airline (rho - When all measurements are complete, the m$J@ softkey menu will appear. Disconnect the verification device. Enter Test 28 (using step keys, entry keys, or front panel knob).
Page 63 H o l d w i t h H o l d w i t h t w o f i n g e r s o n e h a n d Figure 2-12. Aligning the Center Conductor P O R T 1 P O R T 2 H o l d h e r e Figure 2-13.
Page 64 In Case of Diilkulty Inspect all connections. Do NOTdisconnect the cables from the analyzer test ports Doing so WILL AWYLZDATE the calibration that you have done earlier. Repeat the “Device Verification” procedure. De sure to make good connections for each verillcation device measurement. If the analyzer still fails the test, check the measurement calibration as follows: a .
Page 65 Continue to measure the rest of the verification devices and print out the results of all four measurement parameters Print the error terms and examine them for anomalies near the failure frequencies (Refer to the “Error lkrms” chapter in this manual.) Make another measurement calibration and follow the flow chart on the following page.
Page 66 PASS REMEASURED I VERIFICATIO FREQUENCY WITH ONE DEVICE SUBSTITUTE C A L K I T SUBSTITUTE V E R I F I C A T I O N K I T SUBSTITUTE CABLES System Verification and...
Page 67: Interpreting The Verification Results
Interpreting the Verification Results The following Sgures show typical verifkation results, with dump graphics activated, that could appear on a system verification printout. These printouts compare the data from your measurement results with the traceable data and corresponding uncertainty specifications Use these printouts to determine whether your measured data falls within the total uncertainty lhnits at all frequencies.
Page 68 20 Apr 19% 01:34:45 Margin Upper lim -20.197 a -20.208 ce 1.000 000 000-20.126 CB -20.234 8 1.500 000 WO-20.155 d) 2.000 OW 000-20.197 CB -20.246 3.000 000 M)O-20.19 dB 9.000 000 000-20.235 dl 10.500 000 000-20.257 a 12.000 000 wo-20.295 dB 13.500 OW 000-20.307 dB -20.574 &...
Page 69 234 Syotom &riiiwtiin ad...
Page 70 1. Frequency Accuracy Performance ‘l&t This test checks the frequency accuracy of the analyzer at its maximum frequency. Required Equipment and ‘Idols (HP 8719Di2OD Only) Frequency Counter ........... . HP 5350B RF Cable .
Page 71 2. Select the analyzer CW frequency: a. F’or the HP 8719D, press (13.5) @. b. F’or the HP 872OD, press 12oJ @. c F’or the HP 8722D, press @ @J. 3. Write the frequency counter reading on the “Performance Test Record.”...
Page 72: Power Flatness Performance L&T
2. Power Flatness Performance Wst The source power level is tested at 201 frequencies across the frequency range of the analyzer. Required Equipment and lbols (HP 8719DBOD Only) Power Sensor ............HP 8485A Adapter 3.5~mm (f) to 3.5~mm (f) .
Page 73 On the analyzer, press lpresetl enter the power value listed in ‘IWe 2-3 and then press Model/Option HP 8719D/2OD 5 d&u HP 8722D -15 dJ3m -10 dBln 6. Pressm 8. During the sweep, notice the maximum and minimum power level readings, and write these on the “Performance lkst Record.”...
Page 74 0.15 dE3. lb eliminate the calibration factor approximation as the cause of and rotate the knob to the frequency in question. b. Set the calibration factor on the power meter to the value indicated by the power sensor. c. The corrected power level reading should be between the limits shown in the “Performance l&t Record.
Page 75: For 8719Dfiod Only
3. Power Linearity Performance l&t to measure R channel. -10 dJ3m -15 dBm -10 dBm -20 dBm -15 dBm -10 dBm 6. Refer to Table 24 and enter the power value for PM for the particular analyzer under test. After you enter the value, press @. 7.
Page 76: F'or 87221) Only
14. Read the marker value from the analyzer display and add 5 dE% Write the 16. Read the marker value from the analyzer display and add 5 dB. Write the calculated value on the test record. 17. Repeat steps 10 through 16 but enter the power value listed in row Pa and add 10 dB to arrive at the calculated value.
Page 77 31. Press 32. Read the marker value from the analyzer display and add 5 dB. Write the calculated value on the test record. 33. Press m (20) (ZJJ. 34. PressLstoe](ZJ~. 35. Repeat steps 21 through 32. 36. Press m Iso] (EJJ. 37.
Page 78 1. Ensure that the power meter and power sensor are operating to specification. 2. The source relies on the power linearity adjustment for correct performance. Refer to “Power Linearity Adjustment” and perform the procedure. Then repeat this test. 3. If the analyzer repeatedly fails this test, refer to “Source Troubleshooting” located later in this manual.
Page 79 Required Equipment and ‘lbols (HP 8719D/2OD Only) Calibration Kit............HP 85052B/D RF Cable Set..
Page 80 the remaining frequency segments of your analyzer. (Refer to ‘Ibble 2-5.) If your analyzer has the new, faster CPU F’irmware Revision Note 50.000101 MHZ 0.84 alI8 5 (HP 871OD) 13.5 GHz 5(HP 872OD/22D) 20 GHz 6 (HP 8722D) 20 GHz System Verification and...
Page 81 ents have been entered, press 5. To set up the port 1 measurement, press: All 8722D I-lo] @ (for Option 007 -5 dBm) 6. Connect a thru (RF cable) between ports 1 and 2. ress (CiJ 8. Remove the thru and connect 50 ohm terminations to ports 1 and 2. 2-46 System Verification and...
Page 82 This measurement takes several minutes. 10. When the analyzer beeps, press 13. When the single sweep has been taken, press the following keys: 14. Read the mean value and standard deviation from the analyzer display. Calculate the dynamic range value, using the following equation. 20 x log [(3 x Standard Deviation) + Mean Value] Write the calculated value on the “Performance ‘I&t Record.”...
Page 83 If the Instrument fiils This ‘kst 1. F’irst suspect the connections, the calibration standards and the cable. Visually inspect all of the connectors and repeat the test. 2. In case of repeat failure, gage the connectors, see ‘Principles of Microwave Connector Care”...
Page 84: Performance Test Record
Performance ‘I&t Record The complete system performance verification record includes the printout from the total system uncertainty test, these test records, and a certillcate of calibration. Use the following sheets to record the results of the performance tests You may wish to copy the sheets to retain them as masters...
Page 85 Performance lkst Record for HP 8719D/ZOD/22D Report Number Date Date of Last System calibration Customer Model Relative Humidity Ambient temperature at performance Model Nnnnber...
Page 86 26.0 (HP 3722D) * T h e m easurement uncertainty is based on equipment sped&d in lhble l-2 in the ‘Service Min. HP 8719D 0.3 dB HP 8719D (Opt. 007) + 3.0 dl3m 0.3 dB HP 872OD 0.3 dB HP 872OD (Opt. 007) + 3.0 dBm...
Page 87 BP 87lODBOD 0.356 0.35 dB HP 871BDBOD - 0 . 6 dB - - 0.6 dB - 0 . 6 dB - - 0.6 dB 0.35 dB 0.35 dB 1.0 dB -l.0 dB - - Power Value Settings for lksting Ihmarity option 007 - 1 0 dBm -15 dBm...
Page 88 System Verification and...
Page 89 Adjustments and Correction Constants adjustments, electrical a@stments, and correction constants The correction constants are empirically derived data that are stored in memory and then recalled to refine the instrument’s measurements and to determine its proper operation. Any the the A7 CPU assembly is replaced, all of the correction constants must be regenerated and stored on the new assembly.
Page 90 This chapter contains the following adjustment procedures: Source Pretune Correction Constants (Test 43) Analog Bus Correction Constants (‘J&t 44) Protected Option Numbers Correction Constants (l&t 50) Unprotected Hardware Option Numbers Correction Constauts Output Power Adjustments Power Linearity Adjustment Correction Constants Retrieval Procedure n Loading Firmware Reference Assembly VCO Tune Adjustment Frequency Accuracy Adjustment...
Page 91: Post-Repair Procedures
Post-Repair Procedures The following tables list 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. A1 Pront Panel None System Verilhtion...
Page 92 Correction Consbrnte (Ch. 8) None System Veri&ation System Verification System Verification A11 Phase Lock Reference Assembly VC0 Tune Fractional-N Spur Avoidance and FM Sideband went A14 F’radonal-N System VeMcation None None These te8t.s are located in Chapter 4, ‘Start Trouble6hooting Here.” 34 Adjustments and Correction Constants...
Page 93 Correction Constants (Ch. i3) None None None Operation Checkt Interface Output Power wents Power Level %tst Power Level T&t Power Level l&t Source Pretune Lower F’ront None Observation Panel Assembly from S11 to azz) Power Level l&t Output Power wents Output Power Adjlletmente Power Level %3t Power Level T&t...
Page 94 Correction Constsnfs Power went Power Level l&t System Ver&ation Power Level Tkst Operation Checkt Attenuator None Operation Checkt None None Operation Checkt and Correction Constants...
Page 95 Adjustments and Correction Constants...
Page 96: A7 Jumper/Switch Positions
1. Remove the power line cord from the analyzer. Set the analyzer on its side. 3. Remove the two corner standoffs from the bottom of the instrument with the Loosen the captive screw on the bottom cover’s back edge, with the T-15 5.
Page 97 EPROM A L T E R (ALT) N O R M A L ( N R M ) Figure 3-1. A7 Jumper Positions (Firmware revisions &xx and below.) Slide Rocker Normal Mode Alter Mode and Correction Constants 3-8...
Page 98: Source Pretune Correction Constants (T&T 43)
Source Pretune Correction Constants (l&t 43) Required Equipment and ‘Ibols (HP 8719D/20D only) Frequency counter .., ......... . . HP 535OB’...
Page 99: Incaseofdi~Culty
When the prompt, Set source to 2.345 GHz, then continue appears, use the front panel knob to adjust the fr 5 MHz of 2.345 GHz. Press when the frequency is set. For the HP 8722D, when the prompt, Set source to 19.550 GHz, then continue appears, use the front panel knob to adjust analyzer source to within 5 MHz of 19.550 GHz.
Page 101 Required Equipment and ‘Ibols RF Cable (HP 8719D/20D Only) ....... HP 85131C/D/E/F RF Cable (HP 8722D Only) .
Page 102 ADC Offset Correction Constants (Bst 48) These correction constants improve the dynamic accuracy by shifting small 1. Make sure the A7 jumper/switch is in the Alter position (AU’). Note Observe the analyzer for the results of the adjustment routine: If the analyzer displays ADC Ofs Cor DONE, you have completed this procedure If no more correction constant routines are going to be performed, return the 5.
Page 103: Serial Number Correction Constants (L&T 49)
Serial Number Correction Constants (Test This procedure stores the analyzer serial number in the A7 CPU assembly Perform this procedure ONLY if the A7 CPU assembly has been replaced. Make sure the A7 jumper/switch is in the Alter position (AUl’). Record the ten character serial number that is on the analyzer rear panel .
Page 104 Observe the analyzer for the results of the routine: If the analyzer displays the message Serial Cor DOME, you have completed this procedure 8. If no more correction constant routines are going to be performed, return the 1. If the analyzer does not display DOlIE, then either the serial number that you entered in steps 3 and 4 did not match the required format or a serial number was already stored.
Page 105: Protected Option Numbers Correction Constants (Test 50)
Protected Option Numbers Correction Constants This procedure stores the instrument’s protected option(s) information in A7 CPU assembly EEPROMs You can also use this procedure to remove a serial number, with the unique keyword, as referred to in “Serial Number Correction constant.
Page 106 Observe the analyzer for the results of the adjustment routine: If the analyzer displays Option Cor DOME, you have completed this procedure. If the analyzer has more than one option, repeat steps 3 through 6 to 8. If no more correction constant routines are going to be performed, return the 1.
Page 107: Unprotected Hardware Option Numbers Correction Constants
Unprotected Hardware Option Numbers Correction Constants This procedure stores the instrument’s unprotected option(s) information in A7 CPU assembly EEPROMs 1. Make sure the A7 jumper/switch is in the Alter position (AW). 2. Record the installed options that are printed on the rear panel of the analyzer.
Page 108 6. After you have entered a3l of the instrument’s hardware options, press the following keys: View the analyzer display for the listed options 8. When you have entered all of the hardware options, return the A7 jumper/switch to the Normal position (NRM). 9.
Page 109: Output Power Arijustments
Output Power Adjustments Required Equipment and lbols (HP 8719D/2OD Only) Power meter ..........HP 436A, 437B/438A Power sensor .
Page 110: Set The Potentiometers To The Minimum Levels
Note The analyzer may display the message CAUTION TEST PORT with the procedure. Set the potentiometers to the minimum levels. 4. Set the low band power potentiometer (A59 R4), full counter-clockwise. 5. Set the offset potentiometers (A59 R70, R71, RBO), to their full counter-clockwise position.
Page 111: Starttheadjustment
II v BLANKING Figure 3-4. Location of Output Power Adjustments Start the Adjustment 7. Connect the power sensor to T&t port 1. Adjustments and Correction Constants...
Page 112: Adjust Mid Band Power
10. Press@(iZiJ~[Stopl)~(ZJJ. 11. Pressm 12. If the analyzer is not phase locked, adjust Low Band Power Adjust, A59 R4, clockwise until the instrument phaselocks across the frequency range 50 14. Adjust the low band power resistor (A59 R4) for a power meter reading that is equal to the value listed under “Power A”...
Page 113: Finetunetheflatness
19. Adjust the mid band power offset resistor (A59 R71) for a power meter reading that is equal to the value (f0.2 dB) listed under “Power B” in 20. Press= 21. A@st the mid band power slope resistor (A59 R88) for a power meter reading that is equal to the value (&2 dl3) listed under “Power B”...
Page 114 37. Press (jSa’eRefl (TJ LxlJ. . Set the calibration power to the power level from the “Power C” column in lhble 34. . See Figure 3-5. NETWORK ANALYZER POWER SENSOR Wait for the analyzer to Msh the power meter calibration. Note OVERLOAD, REDUCE POWER.
Page 115 Connect Port 1 to Port 2. e ln “Power C” column of ‘hble 3-4 and then press The analyzer’s trace now represents power flatness 46. Adjust the slope and offset of all the bands for a flatness of fl dB to 20 GHz This sets the mid band power level.
Page 116 1. Check for available power and modulator functionality by adjusting the power DAC from 0 to 4005. The power should vary from approximately -33 dB to +4 dB from the maximum speciiled power. the previous step, refer to “Source Troubleshooting” located later in this 3-28...
Page 117: Power Linearity Adjustment
Power Linearity Adjustment Before you perform this procedure, you must perform the previous procedure, “Output Power Adjustment.” This procedure is a continuation of the “Output Power Adjustments” procedure. Preparatory Steps If you haven’t already done so, perform the “Output Power Adjustment” procedure.
Page 118: For 8722D Analyzers Only
DAC, press @iZ) For the HP 8719D or 872OD, press [2583 (ZJ. For the HP 8722D, press L45sJ (iiJ. 9. Adjust the front panel knob until the measurement trace is centered around Press [w) Divide the previously recorded DAC number by 256.
Page 119: Forallanalyzers
For All Analyzers Press LMenu) i@##@ and enter the power level that is listed as “Pl” in ..lhble 3-5 and then press (XJ. The displayed trace should be centered on the reference (f0.5 dB). If the trace is centered on the reference, continue with step 27. lb switch on the power DAC, press m Adjust the front panel knob until the measurement trace is centered around the reference line.
Page 120: Incaseofdifkulty
In Case of Difkulty 1. If the analyzer fails the “Power Linearity Performance Test,” do the following: If the analyzer fails the performance test for the power levels listed as P2, If the analyzer fails the performance test for the power level listed as Adjustment.
Page 121 Power Meter ....... , ....HP 436A, 437B, 438A Power Sensor .
Page 122 BLANKING Figure 3-6. Location of Blanking Adjustment In Case of DiEiculty If you are unable to perform this adjustment, refer to the “Source Troubleshooting” chapter in this manual. and Correction Constants 334 Mjustmmta...
Page 123 Initialize EEPROMs (‘lkst 53) This internal service test performs the following functions: initializes certain EEPROM address locations to zeroes replaces the display intensity correction constants with default values Note This routine wiU alter the serial number or option number correction constants (‘lksts 49 and 50, respectively). 2.
Page 124: Eeprom Backup Disk Procedure
EEPROM Backup Disk Procedure Floppy Disk ........HP 92192A (box of 10) The correction constants, that are unique to your instrument, are stored in EEPROM on the A7 controller assembly.
Page 125 5. Write the following information on the disk label: analyzer serial number today’s date “EEPROM Backup Disk” and Correction Constauts...
Page 126: Correction Constants Retrieval Procedure
Correction Constants Retrieval Procedure EEPROM Backup Disk By using the current EEPROM backup disk, you can download the correction constants data into the instrument EEPROMs Insert the ‘EEPROM Backup Disk” into the HP 8753E disk drive. Make sure the A7 jumper/switch is in the Alter position. Use the front panel knob EEPROM data for the analyzer.
Page 127: Loading Firmware
Loading Firmware Required Equipment and lbols None required. Analyzer warmup l%w: The following procedures will load firmware for new or existing CPU boards in an HP 8719DE?OD/22D network analyzer having firmware revision 7.xx or above. Loading Firmware into an Existing CPU Use this procedure for upgrading llrmware in an operational instrument whose CPU board has not been changed.
Page 129: Incaseofdi~Culty
If the firmware did not load successfully, LED patterns on the front panel can help you isolate the problem. If the following LED pattern is present, an acceptable iirmware lllename was not found on the disk. (The desired format for flrmware flenames is HP 8719D/2OD/22D. and Correction Constants 341...
Page 131 Reference Assembly VCO Tune Adjustment Required Equipment and ‘lbols Extender board, large ......part of tool kit 08720-60004 Analyzer warnvup time: 30 This a4@stment centers the reference assembly VCO (voltage controlled oscillator) in its tuning range.
Page 132 A d j u s t T u n e R e d VCO Tune Adjustment Location Figure 3-7. 6. Adjust VCO TUNE with a non-metallic adjustment tool to 0.0 V f600 mV (within one division of the reference line). The adjustment is sensitive, and if out of adjustment may display au irreguhr waveform.
Page 133 Frequency Accuracy Adjustment Required Equipment and ‘Idols (HP 8719D/2OD Only) Frequency Counter ........... . HP 5350B RF Cable .
Page 134 NETWORK ANALYZER FREQUENCY COUNTER Figure 3-S. Frequency Accnracy Adjustment Setup Note Make sure that the frequency counter and network analyzer references are NOT connected. 3. For Option lD5 Instruments Only: Remove the rear panel BNC to BNC jumper that is connected between the “EXT REF” and the “10 MHz Precision Reference,”...
Page 135 5. No adjustment is required when the frequency counter measurement results are within specification: for HP 8720D for HP 8722D Otherwise, locate the Al2 assembly (red extractors) and adjust the VCXO ADJ (see Figure 3-9) for a frequency measurement within specif?cations. vcxo A D J R e d...
Page 136 Instruments with Option lD6 Only 8. Reconnect the BNC to BNC jumper between the “EXT REF’” and the “10 MHz Precision Reference” as shown in F’igure 3-10. B N C T O B N C JUMPER H I G H S T A B I L I T Y FREQUENCY A D J U S T 9.
Page 137 Static-control ‘Ikble Mat and Earth Ground Wire .....9300-0797 (HP 8719D/2OD) Adapter 3.5~mm to Type-N (f) ..... HP 1152545 (HP 8722D) Adapter 2.4mm to 7-mm .
Page 138 CABLE ASSEMBLY Fractional N Spur Avoidance and FM Sideband Adjustment Setup 3. Set the spectrum analyzer measurement parameters as follows: Reference Level Resolution Bandwidth Center Frequency 2.5 GHz and Correction Constamts...
Page 139 5. Adjust the 100 kHz (R77) for a null ( minimum amplitude) on the spectrum analyzer. The minimum signal may, or may not, drop down into the noise floor. ORANGE Figure 3-12. 6. On the spectrum analyzer, set the center frequency for 530.039 MHz. 7.
Page 140 16. On the network analyzer, press 17. Adjust the API4 (R47) for a null ( minhuum amplitude) on the spectrum analyzer. 1. If this adjustment can not be performed satisfactorily, repeat the entire procedure. 2. If the analyzer repeatedly fails this adjustment, replace the Al3 board assembly.
Page 141: Start Troubleshooting Here
Start Troubleshooting Here The information in this chapter helps you: Identify the portion of the analyzer that is at fault. Locate the specMc troubleshooting procedures to identify the assembly or peripheral at fault. To identify the portion of the analyzer at fault, follow these procedures: Step 1.
Page 142: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in the 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. 2.
Page 143: Step 1. Initiai Observations
Step 1. Initial Observations Initiate the Analyzer Self-!lkst Disconnect ail devices and peripherals from the analyzer. Switch on the anaQzer and press (w) Watch for the indications shown in F’igure 41 or Figure 42 to determine if the analyzer is operating correctly. MESSAGES APPEAR IN SEOVENCE: SELF TEST PASSED1 AFTER PRESET...
Page 144 MESSAGES APPEAR IN SEOUENCE: INITIALIZING INSTRUMENT, PLEASE WAIT SELF TEST PASSED ILLUMINATES DURING AND AFTER PRESET PARAMETERS APPEAR AFTER PRESET: ILLUMINATES DURING PRESET l o g M A G , 1DdB. R E F OdB S T A R T 0 . 0 5 GHz. S T O P 2 0 . 0 GHz (HP6720D) Figure 4-2.
Page 145: Step 2. Operator's Check
Step 2. Operator’s Check Description The operator’s check consists of two softkey initiated tests: Op Ck Port 1 and Op Ck Port 2. A short is connected to port 1 (port 2) to reflect all the source energy back into the analyxer for an SU (E&2) measurement.
Page 146: Procedure
Procedure The display should show TEST 21 Op Ck Port 1 in the active entry area. to begin the test. 4. At the prompt, connect the short to the port indicated. Make sure the connection is tight. 6. The test is a sequence of subtests At the end of the subtests, the test title and result will be displayed.
Page 147: Step3.Hp.ibsystemscheck
Step 3. HP-IB Systems Check Check the analyzer’s HP43 functions with a ICWWT& work&g passive peripheral (such as a plotter, printer, or disk drive). good 1. Connect the peripheral to the analyzer using a &own HP-IB cable. to enable the analyzer to control the peripheral.
Page 148 If Using 8 Plotter or Printer 1. Ensure that the plotter or printer is set up correctly: power is on pens and paper loaded pinch wheels are down some plotters need to have Pl and P2 positions set Press @GE) and then are functional in the analyzer.
Page 149: Troubleshooting Systems With Multiple Peripherals
The HP-IB interface hardware is incorrectly instaRed or not operational. (See ‘HP-IB Requirements” in the HP 8719DEOD&$?D The programming syntax is incorrect. (Refer to the HP 8719D~Dk22D If the analyzer appears to be operating unexpectedly but has not completely failed, go to “Step 4. Faulty Group Isolation.”...
Page 150: 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 five functional groups in sequence, and determine which group is faulty.
Page 151: Power Supply
Power Supply Check the Rear Panel LEDs Switch on the analyzer and look directly at the rear panel. Notice the condition of the two LEDs on the Al5 preregulator. (See F’igure 4-4.) The upper (red) LED should be off. The lower (green) LED should be on. R E D L E D GREEN LED L I N E V O L T A G E...
Page 152: 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 illate. The port 2 LED illuminates The amber LEDs go off after a few seconds, except the CH 1 LED.
Page 153 Observe the pbwer Up Sequence Switch the analyzer power OS, 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 ihminate~ 3.
Page 154 ILLUMINATES DURING AFTER PDWER UP ILLUMINATES ==4 SECONDS ILLUMINATES A F T E R PDWER UP Up Sequence Figure 46. Front F&awl Power 4-14 Start Tmublrshootir Hem...
Page 155 Verify Internal Xksts Passed ../ c.-. .._..__... , , , , _ , , , , The display should indicate: TEST PASS 0 ALL INT with this step. or failing. In this case, continue with the next procedure to check the If you have unexpected results, or if the analyzer indicates a specific test reports the first failure detected.
Page 156: Source
Source Phase Lock Error Messages The following list contains all phase lock error messages and their descriptions. The ilrst IF was not detected during the pretune stage of phase lock. The first IF was detected at the pretrme stage but phase lock could not be acquired thereafter.
Page 157: Check Source Output Power
On the power meter, set the calibration factor for the value on the power sensor that corresponds to 1 GHz. For the HP 8719D, press QD repeatedly to check power at 2,5, 10, and 13.5 each frequency. The power should be within f2 dBm of the set value.
Page 158 8. For the HP 872OD, press &) repeatedly to check power at 2, 5, 10, and 20.0 The power should be within f2 dF3m of the set value. 9. For the HP 8722D, press Q) repeatedly to check power at 2, 5, 10,20, and 40.0 GHz.
Page 159 No Oscilloscope or Power Meter? Try the ABUS Monitor ABUS node 9. S C A L E R E F M##$j. The display should resemble F’igure 4-8. If any of the above procedures provide unexpected results, or if error messages are present, refer to Chapter 7, “Source Troubleshooting.
Page 160: Receiver
If any input shows unexpected results, go to the “Receiver Troubleshooting” section. Otherwise, proceed to Accessories. 1. For the HP 8719D/2OD, perform the following steps: should show a at input A (port 1). The trace should resemble Figure 49 belo c.
Page 161: Switch Repeatability
2. For the HP 8722D, perform the following steps: ..” ... . . _ . _ __..; i ~ ~ .._ ... - . .I - .
Page 162: Accessories
Accessories If the analyzer has passed all of the above checks but is still making incorrect measurements, suspect the system accessories Accessories such as RF or interconnect cables, calibration or veriWation kit devices, and adapters can all induce system problems Reconfigure the system as it is normally used and reconfirm the problem.
Page 163 (oversized art) /08720/90292/art/sb6122d.hpg Start Troublrrhooting Hen...
Page 165 4.24 !&art Troubleshooting Hen...
Page 167 4-26 Start Troubleshooting Hen...
Page 171: Power Supply !I"Roubleshooting Flowchart
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”...
Page 172 Power Supply Troubleshooting Flowchart Power Supply Troubleshooting...
Page 173: Assembly Replacement Sequence
Assembly Replacement Sequence analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the that identifies the faulty assembly. 2. Order a replacement assembly. Refer to Chapter 13, “Replaceable Parts.” 3. Replace the faulty assembly and determine what adjustments are necessary. Refer to Chapter 14, “Assembly Replacement and Post-Repair Procedures”...
Page 174: Simplified Block Diagram
Refer to the detailed block diagram of the power supply (F’igure 5-7) located at the end of this chapter to see voltage lines and specifk connector pin numbers. S W I T C H I N G POWER L I N E P O W E R - S U P P L Y FAN POWER MICROCIRCUIT...
Page 175: Starthere
Start Here Check the Green LED and Red LED on Al6 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 During normal operation, the bottom (green) LED is on and the top (red) LED is off.
Page 176: Measure The Post Regulator Voltages
Check the Green LJZDs 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% uncertainty of the power supply, refer to "Measure the Post Regulator Voltages"...
Page 177 + 65 V (Not Uned) -14.4 to -15.6 -12.6 FT (Not Used) -12.1 to -12.8 + 14.5 to + 15.5 -5.2 V -5.0 to -5.4...
Page 178: Check The Line Voltage, Selector Switch, And Fuse
If the Green LED of the Al6 is Off or Blinking 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 179: Checkthea8Postregulator
If the Red LED of the Al6 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 180 Verify the Al6 Preregulator Verify that the Al5 preregulator is supplying the correct voltages to the AS post regulator. Use a voltmeter with a small probe to measure the output voltages of If the voltages are not within tolerance, replace A15. If the voltages are within tolerance, Al5 is verified.
Page 181 NOTE: Check for a Faulty Assembly This procedure checks for a faulty assembly that might be shutting down the the +SVCPU Iine through the motherboard the +SVDIG Iine through the motherboard Do the foIIowing: 1. Mtch off the anaIyzer. 2. Ensure that AlSWl is reconnected to A8. (Refer to Figure 5-5.) 3.
Page 182 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 When extensive disassembly is required, refer to Chapter 14, “Assembly Replacement and Post-Repair Procedures B Refer to Chapter 13, “Replaceable Parts,”...
Page 183: Check The Operating '&Mperature
Check the Operating ‘Jl?mperature 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 184: Ifthegreenledsofthea8Arenota,Ll& : : 1 : 1 : : : : 1
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 185: Remove The Assemblies
If the green LEDs are now on, the Al5 prereguiator 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. 2.
Page 186: Briefly Disable The Shutdown Circuitry
11. Reinstall each assembly one at a time. Switch on the analyzer after each assembly is installed. The assembly that causes the green LEDs to go off or flash could be faulty. Note It is possible, however, that this condition is caused by the this, reinstall the assemblies in a different order to change the loading.
Page 187 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 4. Switch off the analyzer. Of those assemblies that are left on the list, remove or disconnect them from the analyzer one at a time.
Page 188: Inspect The Motherboard
Recommended Order for RemovaUDiscomwction for Troubleshooting the A8 Roard from the Bemoved Awembl Inspect the Motherboard Inspect the Al7 motherboard for solder bridges and shorted traces In particular, inspect the traces that carry the supplies whose LEDs faulted when...
Page 189: Error Messages
Error Messages Three error messages are associated with the power supplies functional group. They are shown here. POWER SUPPLY SHUT DOWN! One or more supplies on the A8 post regulator assembly is shut down due to one of the following conditions: overcurrent, overvoltage, or undervoltage. Refer to “If the Red LED of the Al5 is On”...
Page 190: Troubleshooting
The fan speed varies depending upon temperature. It is normai for the fan to be at high speed when the anaiyzer is just switched on, and then change to low speed when the anaiyxer is cooled. Check the FIm Voltages If the fan is dead, refer to the A8 post regulator block diagram (F’igure 5-7) at the end of this chapter.
Page 191: Intermittent Problems
Intermittent Problems PRESET states that appear spontaneously (without pressing (FiZGFj Since the A7 CPU assembly is the easiest to substitute, do so. If the problem ceases, replace the A7. If the problem continues, replace the Al5 preregulator assembly.
Page 192 Power Supply Troubleshooting...
Page 194: Digital Control Tronbleshooting
Digital Control Troubleshooting Use this procedure only if you have read Chapter 4, “Start Troubleshooting Here. n The digital control group assemblies consist of the following: Al front panel keyboard Begin with “CPU Troubleshooting, n then proceed to the assembly that you suspect has a problem.
Page 195: Assembly Replacement Sequence
Assembly Replacement Sequence The following steps show the sequence to replace an assembly in the network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the that identifies the faulty assembly. 2. Order a replacement assembly. Refer to Chapter 13, “Replaceable Parts." 3.
Page 197 64 Digital Control Troubleshooting...
Page 199 Digital Control Troubleshooting...
Page 200 Digital Control Troubleshooting...
Page 201: Cpu Troubleshooting (A7)
CPU Troubleshooting (A7) The A7 jumper/switch must be in the Normal position (NRM) for these procedures. This is the position for normal operating conditions. To move the jumper/switch to the Normal position (NRM), do the following: 1. Remove the power line cord from the analyzer. 2.
Page 202 Figure 6-3. A7 Jumper Positions (Firmware revisions 6.xx and below.) Alter Mode Normal Mode Slide Rocker Figure 6-4. A7 Switch Positions (Firmware revisions 7.xx and above.) Digital Control Troubleshooting...
Page 203: Checking A7 Cpu Red Led Patterns (For Instruments With Llrmware Revisions 6.Xx And Below.)
Checking A7 CPU Red LED Patterns The A7 CPU has four red LEDs that can be viewed through a small opening in the rear panel of the analyzer. (See Figure 6-5.) power 1. Cycle Cycle the power on the analyzer and observe the four red LEDs. All four If the four LEDs did not turn on, replace the A7 CPU after verifying the power supply.
Page 204 Release the (j+EET’) key Release the @FFii key and watch for the sequence shown below. rapid Note that the far right LED always remains on. Pattern 2 Pattern 3 Pattern 4 Pattern 5 - two left LEDs flicker 4. Observe and evaluate results If the above sequence is observed, and the far right LED remained on, go to “Display Troubleshooting (A19, AH).
Page 205: Checking A7 Cpu Red Led Patterns (F'or Instruments With Ilrmware Revisions 7.Xx And Above.)
Checking A7 CPU Red LED Patterns (For instruments with firmware revisions 7.~3~ and above.) The A7 CPU has five red LEDs that can be viewed through a small opening in the rear panel of the analyzer. (See Figure 6-6.) Four LEDs are easily viewable. The fifth LED must be viewed by looking to the left at an angle.
Page 206 Note If firmware did not load, a red LED on the CPU board will be flashing. Refer to “Loading Firmware” in Chapter 3. 3. Evaluate results If either of the following LED patterns remain, go to “Display Troubleshooting. ’ (front of instrument J.) If any other LED patterns remain, replace the A7 CPU after verifying the power supply.
Page 207: Display Troubleshooting (A18, Al9)
Display Troubleshooting (AM, A19) This section contains the following information: Evaluating your Display Evaluating your Display There are four criteria against which your display is measured: Background Lamp Intensity Green, Red or Blue Stuck Pixels Dark Stuck Pixels Newton’s Rings Evaluate the display as follows: If either the A19 GSP, A7 CPU or A20 assemblies are replaced, perform a If it appears that there is a problem with the display, refer to the...
Page 208 1. Press Cj) MlRE intensity at 100%. Press (System) ‘~~lJYBX~~~ ,+l&3T3 (62) Ixl) liZl%XE TlBT RWTXNE , to set a white screen test pattern on the display. 3. Set the photometer probe to NORMAL. Press @!GEIi~ on the photometer to switch it on and allow 30 minutes of warm-up time.
Page 209: Red, Green, Or Blue Pixels Specifications
Red, Green, or Blue Pixels Specillcations Red, green, or blue “stuck on” pixels may appear against a black background. To test for these dots, press [!I ,$SRVIC!lX MESJU TESH L70_) @ In a properly working display, the following will not occur: complete rows or columns of stuck pixels more than 5 stuck pixels (not to exceed a maximum of 2 red or blue, and 3 2 or more consecutive stuck pixels...
Page 210 Figure 6-8. Newtons Rings Digital Control Troubleshooting...
Page 211: A19 Gsp And Al8 Display Troubleshooting
Display Supply Voltages Measure Power Entering A19 Measure the power supply voltages entering the A19 assembly coming from the A18 assembly. Unplug the wire harness (W14) from the back of the GSP interface. Check pins 2 and 3 for +5.16 fO.l V. (See Figure 6-9.) If the voltages are incorrect, refer to Chapter 5, “Power Supply Troubleshooting.
Page 212: Inspect Ribbon Cable Repeat Display %St 55
display: 55 Disp/cpu com -ND- If the analyzer passes the test, the message TEST RESULT DISPLAYED ON LEDS IF FAILED will be displayed. Press Cfl#TXHUR and the analyzer will display 55 DISP/CPU COM PASS. Press [PRESET_) ~PIH$S~~ FACTlM and go to “Run Display Tests 59-76 n.
Page 213 Figure 6-10. Pin Locations on A19 Figure 6-11. A7 CPU Wking One Pattern...
Page 214 flash once. If the analyzer passes the test, the message PASS is displayed. 76 (substitute the next test number where Iss] was used). Watch for the analyzer display and front panel LEDs to flash. If the analyzer fails any of the tests (59 through Sl), replace the A19 assembly.
Page 215: Front Panel Troubleshooting (Al/A2)
Front Panel Troubleshooting (Al/A2) Check Front Panel LEDs After Preset 1. Press @ZFi) on the analyzer. 2. Observe that all front panel LEDs turn on and, within five seconds after releasing CM), all but the CHl LED turns off. If all the front panel LEDs either stay on or off, there is a control problem between A7 and Al/A2.
Page 216 LBD FMtern Front Wnel Block Number Response Response Response Active Channel Active Channel Instrument State Instrument State COPY ......Response 6-23 Digital Control Troubleshooting...
Page 217 Front Fanel Key Codes (2 of 2) Front Panel Block Decimal LED Pattern Number Response CENTER Instrument State Not used 40-47 Response Response 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.
Page 218 If a controller is available, write a simple command to the analyzer. If the analyzer successfully executes the command, the problem is either the A2 front panel interface or W17 (A2 to motherboard ribbon cable) is faulty. Run the Internal Diagnostic ‘ksts The analyzer incorporates 20 internal diagnostic tests.
Page 219 Probable Fhiled Assembliest ; Comments and Troubleshooting Hints 1 Preset 2 ROM to replace ROM or A7. 4 Main DRAM 5 DSP wr/Rd LO DIP Counter 12 Fr Pan Wr/Rd between A7 and A2 or on A7 assembly. 13 Rear Panel Troubleshooting.”...
Page 220 If the Fault is Intermittent Repeat Test Function If the failure is intermittent, do the following: to switch on the REPEAT repeat function. Then press &ETIII# TE$T$. 4. Press to stop the function. The test repeat function is explained in Chapter 10, “Service Key Menus and Error Messages.”...
Page 221 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: troubleshooting checks. Phase lock error: Perform the “Phase Lock Error” troubleshooting checks. Source Troubleshooting 7-l...
Page 222 Source Troubleshooting Flowchart...
Page 223 Assembly Replacement Sequence The following steps show the sequence to replace an assembly in the network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the that identifies the appropriate troubleshooting chapter faulty assembly. 2.
Page 224 Start Here The use of this section is based on several assumptions: The analog bus has passed test #19. (If not, press Is) SERYfCE !flW TESTS L19) (2-J .E;xE;cEITE TEST. If the analyzer falls the test, return to “Step 4. Faulty Group Isolation” section of the “Start Troubleshooting Here”...
Page 225 Figure 7-l. HP 8719D/2OD 0.25V/GHz Rhveform at Abus Node 9 Figure 7-2. J3P 8722D 0.25V/GHz Waveform at Abus Node 9 If the waveform appears normal in one but not all frequency bands, go to “Band-Related Problems” located later in this chapter.
Page 226 Power Not Within Specifications Perform these power adjustments: 1. output power adjustments 2. blanking adjustments If power holes exist, use the block diagram (located in “Start Troubleshooting Here”) and the location diagrams (in “Replaceable Parts”) to check the cables and connections in the RF path. If power levels are incorrect (are not ~t3 dBm of setting) in only one or two bands, go to “Band-Related Problems”...
Page 227 9. Measure the M/A/D/S output power at the R CHANNEL OUT port on the front panel. For the HP 8719D/20D, the power should be at least -18 dBm (-13 dBm, Option 007). For the HP 8722D, the power should be at least -27 dBm (-22 dBm, Option 007).
Page 228 Check Open Loop Power (HP 8719D/20D Only) 1. Use a power meter to measure power at the R CHANNEL OUT port on the front panel. Press [M) SERVXQZ MENU SEIMCE HOlXS SRC AMIST P%Xu The power should be at least -23 dBm (-18 dBm, Option 007).
Page 229 The power should be at least -32 dBm (-27 dBm, Option 007). The power should at least -27 dBm (-22 dBm, Option 007). You may have to change the DAC number slightly to achieve a good power reading. If power is correct, proceed with “Check Al2 Reference.” If the power level is not correct, connect a power meter to the output of Sl leading to the A58 M/A/D/S, and check the power of the YIG oscillator.
Page 230 Check Al4 Fractional-N Checks With ABUS (SYSTEM) .sEvIcE !!F!! llgFM,OG f)lus...~N IMEAS) %wO~ fN h&x m? Figure 7-3.. “” Figure 7-3. Fractional-N Tuning Voltage Waveform at Abus Node 21 frequencies of column one in ‘Ibble 7-l. Front Panel Displayed Counter Value 50 MHz match ‘lhble 7-1, Al4 or the pulse generator may be at fault.
Page 231 that Al3 and Al4 are functional: go to “Check Pulse Generator” or continue with “A14 VCO Range Check with Oscilloscope” to conlirm. with Spectrum Analyzer 2. Set the parameters on the spectrum analyzer: start frequency = 50 MHz stop frequency = 250 MHz bandwidth = 300 kHz 3.
Page 232 Connect an oscilloscope to A14TPl (labeled VCO12). Press @E’Sj PRESET: FACTSFlY @EEEJ SERVKE PEH? ESJWSCE AXES Vary the fractional-N VCO frequency with the front panel knob. If the waveforms do not resemble Figure 7-4 at the frequencies indicated, replace A14. (The amplitude of the waveforms wiII vary from 3 V to 10 V P-P.) 1 2 0 MHz 180 MHz...
Page 233 The tuning voltage range of the VCO is approximately + 1 to + 14 volts. This procedure substitutes power supplies for the normal voltages from Al3 to check the frequency range of the Al4 VCO. Remove the Al3 assembly. Put the Al4 assembly on an extender board. It is not necessary to connect the cables while the Al4 is on the extender board.
Page 234 4. Vary the fractional-N frequency from 120 MHz to 242 MHz. If the period of the signal does not vary from 7.5 psec to 15.5 psec, replace If the period does vary as prescribed, remove the jumper and reinsert A14. 1.
Page 235 Mnemonic L FNHOLD Figure 7-5. Al4 ‘JX’L Signals at AlQTP3 If these signals are bad, replace A14. If they are good, replace A13. Source Troubleshooting...
Page 236 1. Monitor the 1st IF signa.I at the output of A65 A sampler: disconnect the Connect a frequency counter to port 1. Then perform these steps: b. Press #E gOJuST !EXJ RAC E?!$ LOW B#WP and rotate the front panel knob to change the DAC number to about 4013.
Page 237 If the IF signals are incorrect, check the pulse generator bias voltages (see pulse generator. 1. Connect the spectrum analyzer to the network analyzer A65, A sampler (53) IF output. 2. Set the parameters on the spectrum analyzer: center frequency = 10 MHz span = 20 MHz marker = 10 MHz 3.
Page 238 5. Connect the network analyzer’s PORT 1 to the spectrum analyzer input, 6. Set the parameters on the spectrum analyzer: center frequency = 0.9 GHz span = 200 MHz You should see a signal at approximately 910 MHz. 7. Reconnect the spectrum analyzer to the A sampler (53). 8.
Page 239 Band-Related Problems Assemblies Potentially Responsible for Band-Related Problems Low Band Mid Band (HP 8722D Only) Note Problems in RF components, crimped RF cables, and improper connections which generally cause power holes in an RF signal may cause symptoms that indicate a band-related problem. Start by measuring power from S2 (Sl, HP 8722D Only).
Page 240 Note While adjusting the DAC numbers in the following step, monitor port 1 with a spectrum analyzer to be sure that the frequency remains between 50 MHz and 1.1 GHz. DAC numbers that set the analyzer below 50 MHz should not be used. If greater than -5 dBm for DAC numbers from 50 MHz (DAC # -3650) to about 1.1 GHz (DAC # = 4095), troubleshoot the cabling from S2J3 to the R sampler A6452 (refer to the overaIl block diagram).
Page 241 If the cables and connectors are good, replace the A55 YIG 1. If mid band problems still persist, then replace the A58 M/A/D/S. High Band Problems: (HP 8719D/2OD Only) tuning the instrument from about 2.4 to 5 GHz). Loss of lock in high band only may likely be due to a bad cable or connection.
Page 242 5. Check all RF cabling and connections. If any of the cables or connectors are bad, have them repaired or replaced. If the cables and connectors are good, replace the A55 YIG 1. If mid band problems still persist, then replace the A58 M/A/D/S. High Band Problems: (HP 8722D Only) BAND tuning the instrument from about 19.5 to 24 GHz).
Page 243 ... . . i . . . ” -..power meter to measure the power at the faulty port: 4. For the HP 8719D/20D: If you measure at least + 5 dBm (+ 10 dBm, Option 007) at the port: replace the A59 source interface board assembly.
Page 244 For the HP 8722D: If you measure at least -8 dBm (-3 dBm, Option 007) at the port: replace the A59 source interface board assembly. If you measure less than -8 dBm (-3 dBm, Option 007) at the port: press m and R&l: lW 522 (B/R> or R&X: measure power at the other port:-’...
Page 245 Receiver Troubleshooting Use this procedure only if you have read Chapter 4, “Start Troubleshooting Here.” Follow the procedures in the order given, unless instructed otherwise. This section can be used to determine which receiver assembly of the instrument is faulty. The two receiver assemblies that affect aII three signal paths are the A10 digital IF and Al2 reference assemblies.
Page 246 Assembly Replacement Sequence The following steps show the sequence to replace an assembly in the network analyzer. 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here. n Follow up with the faulty assembly. 2. Order a replacement assembly. Refer to Chapter 13, “Replaceable Parts.” 3.
Page 247 4 MHz Check 1. Switch off the analyzer. 2. Remove the A10 board and install it onto the extender board. 3. Use an oscilloscope to observe the 4 MHz signal at AlOP pin 6. If the 4 MHz sine wave signal is present at AlOP pin 6, replace AlO. If the 4 MHz signal is not present at A12P2 pin 36, replace A12.
Page 248 If the A or B signal path is very low and the R signal path is normal, go to “A and B Sampler Check by Substitution.” faulty directional coupler or, more probably, a lossy sampler. lb isolate the fault, continue with “Directional Coupler Check.” 84 Receiver Troubleshooting...
Page 249 Figure 8-1. Typical Bl,R2, A, and B Traces Receiver Troubleshooting 8-5...
Page 250 Directional Coupler Check 1. For the HP 8719D/20D, set the output power to -10 dBm by pressing m 2. For the HP 8722D, set the output power to -15 dBm by pressing LMenu) 3. Connect a 3.5~mm (f) to 2.4~mm (m) adaptor to one end of the RF flexible cable that is supplied with the tool kit.
Page 251 Figure 8-2. Directional Coupler Bypassed If the trace is similar to Figure 8-2, the sampler is good. Therefore, the coupler is lossy and should be replaced. Minor power variations are probably due to the flexible cable and are of no concern. If the trace is abnormally low, the coupler is good and the sampler is at fault.
Page 252 Note be necessary to disconnect addition rigid cables and loosen the transer switch. 5. Connect the IF cable from the output of the R sampler, to the IF Output of the suspect sampler. Disregard the trace. If the instrument phase locks and no error message is displayed, the sampler under test is normal.
Page 253 Note Repair signal path R before troubleshooting signa.I path A or B. 1. If R is the bad signal path, substitute A6 (R 2nd converter) with a 2nd converter from the working signal path. trace of F’igure 8-l. If the trace appears normal, replace the faulty 2nd converter. If the trace appears abnormal, replace AlO.
Page 254 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: Failures which don’t affect the normal functioning of the analyzer but render incorrect measurement data.
Page 255 Inspect and Gage Connectors 1. Check for damage to the mating contacts of the test port center conductors and loose connector bulkheads. If the center pin recession is incorrect, replace the entire connector assembly (see Chapter 14, “Assembly Replacement and Post-Repair Procedures. “) 2.
Page 256 If you detect problems using error term analysis, use the following approach to isolate the fault: 1. Check the cable by examining the load match and transmission tracking terms. If those terms are incorrect, go to “Cable Test”. 2. Verify the calibration kit devices: Loads: If the directivity error term looks good, the load and the test port are good.
Page 257 Isolate the Fault in the RF Path Since the calibration devices have been verified, the problem exists in the test port connector, the coupler, or elsewhere in the internal RF path. lhble 9-l shows which assemblies affect each error term. If more than one error term is bad, note which assemblies are common to each of the bad terms.
Page 258 Figure 9-1. Typical Return Loss Trace of a Good Cable Verify Shorts and Opens Substitute a known good short and open of the same connector type and sex as the short and open in question. If the devices are not from one of the standard calibration kits, refer to the for information on how to use the .~~~~~~~~~~~..~~~ function.
Page 259 Figure 9-2. Typical Smith Chart Traces of Good Short (a) and Open (b) 9-6 Accesseries Troubleshooting...
Page 260 Service Key Menus and Error Messages Service Key Menus These menus ahow you to perform the following service functions: The menus are divided into two groups: 1. Internal Diagnostics 2. Service Features When applicable, the HP-IB mnemonic is written in parentheses following the key.
Page 261 Error Messages The displayed messages that pertain to service functions are also listed in this chapter to help you: Service Key Menus - Internal Diagnostics The internal diagnostics menus are shown in Figure 10-l and described in the following paragraphs. The following keys access the internal diagnostics menus: 1 O-2 Service Key Menus and Error Messages...
Page 262 DELETE Figure 10-l. Internal Diagnostics Menus Service Kay Menus and Error Messages 1 O-3...
Page 263 Tests Menu accesses a menu that allows you to select or execute the service tests. The default is set to internal test 1. Note Descriptions of tests in each of the categories are given under the heading Zb.st in the following pages. The tests are divided by function into the following categories: External Tests (21-25)
Page 264 definition, and the equivalent HP-IB code. The HP-IB command to output the test status of the most recently executed test is OUTPTESS. For more information, refer to “HP-1B Service Mnemonic Definitions” located at the end of this chapter. HP-IB code Definition Display Abbreviation PASS...
Page 265 verifies the analyzer system operation by examining the contents of the measurement calibration arrays. The procedure is in the “System Verification and Performance Tests” chapter. Information about the calibration arrays is provided in the “Error Terms” chapter. generates and stores the correction constants. For more information, refer to the “Adjustments”...
Page 266 accesses softkeys that affect the way tests (routines) run, or supply necessary additional data. toggles the repeat function on and off. When the function is ON, the selected test will run 10,000 times unless you press any key to stop it. The analyzer shows the current number of passes and fails.
Page 267 accesses the power loss/sensor lists menu: calibration factor list for use in power meter calibration measurements. the Edit List menu to allow modification of the calibration data table for power sensor A. the Edit List menu to aIlow modification of the calibration data table for power sensor B.
Page 268 Self Diagnose Softkey You can access the self diagnosis function by pressing, &ZG) %lWf~ BEMU SELF DIAGM3SE. This function examines, in order, the pass/fail status of ail If a failure is detected, the routine displays the assembly or assemblies most probably faulty and assigns a failure probability factor to each assembly.
Page 269 Note The following descriptions of tests 3 and 4 apply to instruments with ilrmware revisions 6.xx and below. RAM. CMOS Verifies the A7 CPU CMOS (long-term) memory with a non-destructive write/read pattern. A destructive version that writes over stored data is shown in ‘lhble 10-2. Verifies the A7 CPU main memory (DRAM) with a non-destructive write/read test pattern.
Page 270 Figure 10-Z. Jumper Positions on the A7 CPU For additional information, see Internal Tests (near the front of this chapter) and the YDigital Control Troubleshooting” chapter. 1 O-1 1 Service Key Menus and Error Messages...
Page 271 Note The following descriptions of tests 3 and 4 apply to instruments with firmware revisions 7.xx and above. Verifies the A7 CPU SRAM (long-term) memory with a non-destructive write/read pattern. A destructive version that writes over stored data at power-on can be enabled by changing the 4th switch position of the A7 CPU switch as shown in Figure 10-3.
Page 272 communicate with each other through DRAM. This also verifies that programs can be loaded to the DSP, and that most of the main RAM access circuits operate correctly. DSP RAM. Verifies the A7 CPU RAM associated with the digital signal processor by using a write/read pattern.
Page 273 write/read to the control element on the Al4 fractional-N (digital) assembly. The control element must be functioning, and the fractional-N VCO must be oscillating (although not necessarily phase-locked) to pass. Sweep Trig. Tests the sweep trigger (L SWP) line from the Al4 fractional-N to the A10 digital IF.
Page 274 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 275 System Verification Tests These tests apply mainly to system-level, error-corrected verification and troubleshooting. Tests 26 to 30 are associated with the system verification procedure, documented in the “System Verification and Performance Tests” chapter. Tests 31 to 42 facilitate examinin g the calibration coefficient arrays (error terms) resulting from a measurement calibration;...
Page 276 Adjustment Tests The tests without asterisks are used in the procedures located in the “Adjustments” chapter of this manual, except as noted. Pretune loop operation. Run test 44 first. Measures three ilxed voltages on the ABUS, and generates new correction constants for ABUS amplitude accuracy in both high resolution and low resolution modes.
Page 277 Power This test measures power linearity at the test port. It also generates correction constants to improve power linearity. and resets the display intensity correction constants to the default values. Also, the test will not alter the serial number and correction constants for Option 007 or 010.
Page 278 Display Tests These tests do not return a PASS/FAIL condition. All six amber front panel exit the test. If any of the six LEDs remain on, the test has failed. Checks to conllrm that the CPU can communicate with the A19 GSP board. The CPU writes all zeros, all ones, and then a the CPU repeats the walking 1 pattern until CPRESETI) is pressed.
Page 279 63-65 2-4. Displays a red, green, and blue pattern for verifying the color purity of the display and also the ability to independently control each color. 5. Displays an all black screen. This is used to check for stuck pixels. 6.
Page 280 10. Displays a character set for showing the user all the different types and sizes of characters available. Three sets of characters are drawn in each of the three character sizes. 125 characters of each size are displayed. Characters 0 and 3 cannot be drawn and several others are really control characters (such as carriage return and line feed).
Page 281 Service Key Menus - Service Features The service feature menus are shown in 10-3 and described in the following paragraphs. The following keys access the service feature menus: Figure 10-4. Service Feature Menus Service Key Menus and Error Messages...
Page 282 Service Modes Menu To access this menu, press: allows you to control and monitor various circuits for troubleshooting. tests the Al3 and Al4 fractional-N circuits. It allows you to directly control and monitor the output frequency of the fractional-N synthesizer (60 MHz to 240 MHz).
Page 283 the phase lock and source assemblies. These keys allow entry of digital data directly into the DAC on the All phase lock assembly. When in this mode: Instrument does not attempt to phase lock. Residual FM increases. DAC numbers in the range of 3650 through 4095 to generate test port output frequencies from allows you to enter DAC numbers in the range of 2900 through 4095 to generate test port output...
Page 284 (reference) channel. For example, in a high power test application, using band limited filters for R channel phase locking. displays a phase lock sequence at the beginning of PLL DIAG on OFF (SM5) each band. This sequence normally occurs very rapidly, making it difficult to troubleshoot phase lock problems.
Page 285 Turning this ON switches out both the A and B attenuation circuits; they cannot be switched independently. Be aware that input signal levels above -30 dBm at the sampler input will saturate the ADC and cause measurement errors. switches in both of the A10 IF attenuators for checking the Al0 IF gain amplifier circuits.
Page 286 The analog bus consists of a source section and a receiver section. The source can be the following: any one of the 23 nodes described in “Analog Bus Nodes” the Al4 fractional-N VCO the Al4 fractional-N VCO divided down to 100 kHz The receiver portion can be the following: the main ADC the frequency counter...
Page 287 Analog In Menu Select this menu to monitor voltage and frequency nodes, using the analog bus and internal counter, as explained below. To switch on the analog bus and access the analog in menu, press: The RE%KU’TXO~ fLQfl key toggles between low and high resolution. Resolution allows you to monitor the analog bus nodes (except nodes 1, 2, 3, 4, 9, 10, 12) with external equipment (oscilloscope,...
Page 288 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, n 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 289 Analog Bus Nodes The following paragraphs describe the 23 analog bus nodes. They are listed in numerical order and are grouped by assembly. Refer to the “Overall Block Diagram” for node locations. Press ( ) @GiiiiT) USER PRESET then use the front panel keys or knob to select an analog bus node. Terminate the entry by pressing (ZJ 1.
Page 290 This is used in the “Analog Bus Correction Constants” adjustment as a reference for calibrating the analog bus low and high resolution circuitry. All Phase Lock 5. All Gnd (Ground reference) 6. All Gnd (Ground reference) 7. All Gnd (Ground reference) Swp Err (Phase error voltage) This node measures the voltage at the output of the phase comparator...
Page 291 the A52 pulse generator are working properly and the instrument is phase locked. If you see anything else, refer to the “Source Troubleshooting” chapter. Figure 10-6. Node 9: 0.25V/GEIz, Source Tuning Voltage All Gnd (Ground reference) 11. IF (IF used for phase lock) Counter ON: analog bus Reading: 10 MHz This node displays the IF frequency (see Figure 10-S) as it enters the All phase lock assembly via the A7 ALC assembly.
Page 292 Figure 10-7. Location of Internal Counter Wading on Display 12. IF (IF on All phase lock after 40 MHz Eiter) This node detects the IF as a voltage at the output of the 40 MHz fIIter on the All phase lock assembly. The trace should be a flat line at about -1.7 V as shown in Figure 10-7.
Page 293 Ext I&f (Rear panel external reference input) This node is used to detect an external reference voltage. If an external reference (timebase) is used, the voltage level should be about -0.6V. If an external reference is not used, the voltage level should be about -0.87V. Counter ON: analog bus Reading: .100 MHz This node counts the Al2 100 kHz reference signal that is used on Al3...
Page 294 (Ground reference) 20. Al2 (Ground reference) 21. FN VCO This node displays the Al4 F’N VCO tuning voltage. This voltage comes from the Al3 fractional-N (analog) assembly and is the return path for the fractional-N phase-locked loop. If the Al3 and Al4 assemblies are functioning properly and the VCO is phase locked, the trace should look like the trace shown in Figure 10-S when in Log F’req.
Page 295 activity, look at this node on an oscilloscope, using PEEK/POKE Menu To access this menu, press CSYSTEM) %WIcE; ?fEW FEEIC&l1(11.. Allows you to edit the content of one or more memory addresses. The keys are described below. Caution The PEEK/POKE capability is intended for service use only. accesses any memory address and shows it in the active entry area of the display.
Page 296 Firmware Revision Softkey Press @TM) SR3M!E ?BHU I!‘XWm to display the current ..in the active entry area of the display as shown in 10-9 below. The analyzer’s serial number and installed options are also displayed. Another way to display the Grmware revision information is to cycle the line power.
Page 297 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 User’s Guide. HP-IB programming HP 8719D/ZOD/Z2D Network Amlgzer information is also provided HP 87190/20022D Network Anul2/zer Invoking Tests Remotely Many tests require a response to the displayed prompts.
Page 298 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 _Ir only if the ABUS is enabled (ANAEkm). OUTPCNTR Outputs the counter’s frequency data. Reads any prompt message sent to the error queue by a OUTPERRO service routine.
Page 299 Note The error messages that pertain to measurement applications are included HP 8719D/2OD/22D Network Anulgm User’s Guide. ADDITIONALSTANDARDSNEEDED Error Number Error correction for the selected calibration class cannot be computed until you have measured all the necessary standards.
Page 300 Post-Repair Procedures” chapter for battery replacement instructions. See the U Preset State and Memory Allocation, n chapter HP 8719D/2OD/22D Network Analgzzr User’s BLOCK INPUT ERROR Error Number The analyzer did not receive a complete data transmission. This is usually caused by an interruption of the bus transaction.
Page 301 CALIBRATION ABORTED Error Number You have changed the active channel during a calibration so the calibration in progress was terminated. Make sure the appropriate channel is active and restart the calibration. CALIBRATION REQUIRED Error Number A calibration set could not be found that matched the current stimulus state or measurement parameter.
Page 302 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 A7 CPU assembly. Refer to the “A7 CC Jumper Position Procedure” in the “Adjustments and Correction Constants” chapter. CORRECTION TURNED OFF Error Number Critical parameters in your current instrument state do not match the parameters for the calibration set, therefore...
Page 303 DEVICE: noton, not connect, wrong addrs Error Number The device at the selected address cannot be accessed by the analyzer. Verify that the device is switched on, and check the HP-IB connection between the analyzer and the device. Ensure that the device address recognized by the analyzer matches the HP-IB address set on the device itself.
Page 304 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. SOURCE NOT READY FOR TRIGGER Error Number There is a hardware problem with the HP 8625A external source.
Page 305 INITIALIZATION FAILED Error Number The disk initialization failed, probably because the disk is damaged. INSUFFICIENT MEMORY, PWR MTR CAL OFF Error Number There is not enough memory space for the power meter calibration array. Increase the available memory by clearing one or more save/recall registers, or by reducing the number of points.
Page 306 Error Number No iiles of the type created by an analyzer store operation were found on the disk. If you requested a specific file title, that file was not found on the disk. NO IF FOUND: CHECK R INPUT LEVEL Error Number The Rrst IF signal was not detected during pretune.
Page 307 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. OVERLOAD ON INPUT A, POWER REDUCED Error Number You have exceeded approximately + 14 dBm at one of the test ports.
Page 308 OVERLOAD ON INPUTR, POWER REDUCED Error Number You have exceeded approximately + 14 dBm at one of the test ports. The RF output power is automatically reduced to -85 dBm. The annotation PJ.l appears in the left margin of the display to indicate that the power trip function has been activated.
Page 309 PHASE LOCK CALFAILED Error Number An internal phase lock calibration routine is automatically executed at power-on, preset, and any time a loss of phase lock is detected. This message indicates that phase lock calibration was initiated and the iirst IF detected, but a problem prevented the calibration from completing successfully.
Page 310 CAUTION: POWER UNLEVELED Error Number There is either a hardware failure in the source or you have attempted to set the power level too high. The analyzer allows the output power to be set higher or lower than the speciEed available power range.
Page 311 POWER SUPPLY HOT! Error Number The temperature sensors on the A8 post-regulator assembly have detected an over-temperature condition. The power supplies regulated on the post-regulator have been shut down. Refer to the “Power Supply Troubleshooting” chapter. POWER SUPPLY SHUT DOWN! Error Number One or more supplies on the A8 post-regulator assembly have been shut down due to an over-current, over-voltage, or under-voltage condition.
Page 312 SAVE FAILED. INSUFFICIENT MEMORY Error Number You cannot store an instrument state in an internal register due to insufficient memory. Increase the available memory by clearing one or more save/recall registers and pressing [PRESET), or by storing files to a disk. SELF TEST #n FAILED Service Error Internal test #n has failed.
Page 313 SWEEP TIME TOO FAST Error Number The fractional-N and digital IF circuits have lost synchronization. Refer to the HP 87’19D/ZO~/Z,ZD Network TEST ABORTED Error Number You have prematurely stopped a service test. Error Number You have exceeded approximately + 14 dBm at one of the test ports (or 0 dBm at the A or B sampler, Option 012 Only).
Page 314 “Optimizing Measurement Results” chapter of the For details on the HP 8719D/ZOD/ZZD Network Armlgzm User’s Guide. theory of error-correction, refer to the “Application and Operation Concepts” chapter of the HP 8719D/ZOD/ZZD Network Aruzlgwr User’s Guide.
Page 315 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. Troubleshooting: If a subtle failure or mild performance problem is suspected, the magnitude of the error terms should be compared against values generated previously with the same instrument and calibration kit.
Page 316 Measurement Calibration Procedure 1. Refer to the “Measurement Calibration” section in Chapter 2, “System Verification and Performance Tests,” and perform the full 2-port calibration with the following modifications: 2. For the reflection measurements (short, open, loads), connect the calibration device directly to the test port instead of to a reference test port. Use the female devices for port 1.
Page 317 The following table lists the calibration coefficients along with their corresponding test numbers. You may wish to refer to this table when performing the “Error Term Inspection” procedure. Calibration Calibration Type Number Response Response l-port and Isolation* Meaning of first subscript: D-dhwtivity; S-source match; R-reflection tracking; X-croastallq L-load match;...
Page 318 Error ‘I&m Inspection Note If the correction is not active, press (GJ The analyzer copies the first calibration measurement trace for the selected error term into memory and then displays it. ‘Ihble 11-l lists the test numbers. Press &ZTZRef) and adjust the scale and reference to study the error term trace.
Page 319 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.” Uncorrected Performance The following tables show typical performance without error-correction. RF cables are not used except as noted.
Page 320 Directivity 23 dB 21 dB 16 dB 15 dB Source Match (Standard, Option 400) 17 dEi 12 dB 11 dB 20 dB 16 dB Source Match (Option 007, Option 086: 11 dB 18 dB 16 dB 12 dB 10 dB 21 dB 17 dB 13 dB...
Page 321 Error ‘Mm 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 The same description applies to both the forward (F’) and reverse (R) terms. The plots shown with each are typical of a working system following a full 2-port calibration as performed in “Measurement Calibration Procedure, ’...
Page 322 Directivity (EDF and EDR) 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 return loss specification than does the uncorrected test port, therefore any power detected from this measurement is assumed to be due to directivity error.
Page 323 Source Match (ESF and ESR) Description These are the forward and reverse uncorrected source match terms of the driven port. They are obtained by measuring the reflection (Sll, S22) of an open and then a short connected directly to the ports. Source match is a measure of the match between the coupler and test set connector, as well as the match between all components from the source to the output port.
Page 324 Reflection Tracking (ERF and ERR) 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). These error terms are characterized by measuring the reflection (Sl1 , S22) of the open and the short during the measurement calibration.
Page 325 Isolation (Crosstalk, EXF and EXR) These are the uncorrected forward and reverse isolation error terms that represent leakage between the test ports and the signal paths. The isolation error terms are characterized by measuring transmission (S21, S12) with loads attached to both ports during the measurement calibration. Since these terms are low in magnitude, they are usually noisy (not very repeatable).
Page 326 Load Match (ELF and ELR) Load match is a measure of the impedance match of the test port that terminates the output of a Z-port device. The match of test port cables is included. Load match error terms are characterized by measuring the Sll and Significant System Components.
Page 327 Transmission Tracking (E!CF and ET&) Transmission tracking is the difference between the frequency response of the reference path (including R input) and the frequency response of the transmission test path (including A or B input) while measuring transmission. The response of the test port cables is included. These terms are characterized by measuring the transmission (S21, S12) of the ‘thru”...
Page 328 System Operation The HP 8719D/20D/22D microwave network analyzers integrate a synthesized source, signal separation devices, a three-channel receiver for measurement of test device characteristics, and a large-screen display. Figure 12-1 is a simplified block diagram of the network analyzer system.
Page 329 Figure 12-1. Simplified System Block Diagram The built-in synthesized source of the analyzer generates a swept or CW (continuous wave) signal in the following ranges: HP 8719D HP 872013 HP 8722D MHz to 13.5 GHz MHz to 20 GHz MHz to 40 GHz...
Page 330 In addition to the analyzer, the system includes cables for interconnections, and calibration standards for accuracy enhanced measurements. Functional Groups of the Analyzer 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.
Page 331 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. Figure 12-2 is a simplified block diagram of the power supply group.
Page 332 The line power module includes the line power switch, voltage selector switch, and main fuse. The line power switch is activated from the front panel. The voltage selector switch, accessible at the rear panel, adapts the analyzer to local line voltages of approximately 115 V or 230 V (with 350 VA maximum). The main fuse, which protects the input side of the preregulator against drawing too much line current, is also accessible at the rear panel.
Page 333 The A8 post regulator filters and regulates the DC voltages received from the voltage supplies. It distributes regulated constant voltages to individual assemblies throughout the instrument. 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.
Page 334 Display Power The A8 assembly supplies + 5VCPU and + 65 V (not used) to the A22 GSP interface board. The +5VCPU is routed to the A19 GSP where it is regulated to +3.3 V and sent to the display. The A19 GSP also controls and supplies power to the A20 backlight inverter.
Page 335 Al Front Panel The Al front panel assembly provides user interface with the analyzer. It includes the keyboard for local user inputs, and the front panel LEDs that indicate instrument status. The RPG (rotary pulse generator) is not electrically connected to the front panel, but provides user inputs directly to the front panel processor.
Page 336 Main CPU @rmware revisions 6.xx and below) The main CPU is a 16-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.
Page 337 The correction constants can be updated by executing the routines in Chapter 3, “Adjustments and Correction Constants. n Digital Signal Processor The digital signal processor receives the digitized data from the A10 digital IF. It computes discrete Fourier transforms to extract the complex phase and magnitude data from the 4 kHz IF signal.
Page 338 The A20 backlight inverter assembly supplies the ac voltage for the backlight tube in the A18 display assembly. This assembly takes the +5.16Vdc from the Al mother board and converts it to approximately 380 Vat with 5 ma of current at 40 kHz.
Page 339 TEST SEQ. This outputs a lTL signal that can be programmed in a test sequence to be high or low, or pulse (10 pseconds) high or low at the end of a sweep for a robotic part handler interface. Pass: ‘ITL high Fail: Tl’Llow VGA OUTPUT.
Page 340 Figure 12-3. Source Functional Group, Simplified Block Diagram The subsweep sequence takes place in the following steps. The paragraphs below describe the details of this process, and provide additional information on the assemblies in the source group. 1. The source is pretuned low. The source signal (SOURCE OUT) is fed to the R sampler.
Page 341 Source Pretune The pretune DAC (digital-to-analog converter) in the All phase lock assembly sets the source YIG oscillator frequency to approximately 2.4 GHz. This signal (SOURCE OUT) goes to the R sampler assembly. The A14/A13 fractional-N assemblies comprise the synthesizer. The source feedback circuit phase locks the YIG oscillator to the synthesizer output signal as explained below under “Al1 Phase Lock: Comparing Phase and Frequency.
Page 342 A11 Phase Lock: Comparing Phase and Frequency The 10 MHz 1st IF signal from the A64 sampler is fed back to the All phase lock assembly. In All it is amplified, limited, and filtered to produce a 10 MHz square wave. This is divided down to 1 MHz, then applied to a phase/frequency detector that compares it to a crystal controlled 1 MHz signal (PL REF) from the Al2 reference assembly (see “Al2 Reference: the Crystal Reference Frequencies,"...
Page 343 2550 - 4710 131.1 - 220/6 4710 - 8256 142.5 - 234 8256 - 13562 159.7 - 235.4 13562 - 20000 178.7 - 223.3 20000 - 25000 148.9 - 238.2 25000 - 40000 This assembly provides stable reference frequencies to the rest of the instrument by dividing down the output of a 40 MHz VCXO (voltage-controlled crystal oscillator).
Page 344 Source Block: The YIG Oscillator Signals The source block includes two YIG oscillators and a 3.8 GHz hxed oscillator. The outputs of these oscillators produce the source signal. In phase-locked operation, this signal tracks the stable output of the synthesizer. Figure 12-4 illustrates the assemblies in the source block.
Page 345 The full YIG oscillator frequency range is achieved in two bands: Band Frequency Range 50 MHz to 2.55 GHz High 2.55 GHz to 20.0 GHz Mid (HP 87221)) High (HP 8722D) 20 GHz to 40 GHz In the low band, the 2.4 to 20 GHz output of YIGl and the lixed 3.8 GHz output of the A57 fixed oscillator are mixed in the A53 mixer/amplifier assembly.
Page 346 Signal Separation Figure 12-5. Signal Separation, Simplified Block Diagram The M/A/D/S microcircuit accomplishes four separate functions: The modulator controls the output power proportionally to the signal produced by the ALC circuit on the source Interface board. The amplifier provides up to + 30 dB of amplification that will allow up to + 5 output from the test port.
Page 347 The amplifier can provide +30 dB of amplification for test port output power levels up to +5 dBm for HP 8719D/20D (-10 dBm for HP 8722D). The detector outputs a voltage that is proportional to the RF power out of the amplifier.
Page 348 The step attenuator provides coarse power control for the source signal. It is an electro-mechanical attenuator, controlled by the A7 CPU, that provides 0 to 55 changing the level of the incident power in the reference path. The output of the step attenuator is fed into the S4 transfer switch. This is a solid-state switch.
Page 349 Receiver Theory The receiver measures and processes the input signals into digital information for display. Figure 12-7 is a simplified block diagram of the receiver functional group. The Al2 reference assembly, which is part of the source group, is also included in the illustration to show how the 2nd LO signal is derived.
Page 350 The signal from the source is mixed with the 1st LO harmonics in the samplers. One of the harmonic signals is 10 MHz above the desired frequency. The mixing products are atered, leaving only the difference between that harmonic and the source frequency: this fixed 10 MHz signal is the 1st IF (Fir = N x FVCO - Fs, where N is the harmonic number).
Page 351 The processed and formatted data is llnally routed to the display, and to the HP-IB for remote operation. Refer to “Digital Control Theory” in this section and to Data Processing in the tirst chapter of the Reference for more information on signal processing. An additional input to the A10 assembly is the analog bus (ABUS), a built-in service tool for testing analog circuits within the instrument.
Page 352 This chapter contains information for ordering replacement parts for the HP 8719D/8720D/8722D network analyzer. Replaceable parts include the following: major assemblies hardware In general, parts of major assemblies are not listed. Refer to ‘Ihble 13-2 at the back of this chapter to help interpret part descriptions in the replaceable parts lists that follow.
Page 353 Replacing an assembly The following steps show the sequence to replace an assembly in an HP 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly. 2.
Page 354 Rebuilt-Exchange Assemblies Under the rebuilt-exchange assembly program, certain factory-repaired and tested modules (assemblies) are available on a trade-m 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 355 Figure 13-1. Module Exchange Procedure 1 3 4 ReplaceableParts...
Page 356 Replaceable Part Listings The following pages list the replacement part numbers and descriptions for the HP 8719D/8720D/8722D 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 357 Major Assemblies, Top Description Ref. Number NOT SHOWN (ax ‘Front Panel Assembly, Inside”) NOT SHOWN (see “Front Panel Assembly, Inside”) 08720-60190 DISK DRIVE ASSY NOT SHOWN (see ‘Major Assemblies, Bottom”) 08722-60011 BD ASSY-POST REMJLATOR (8719Dl8720D) BD ASSY-POST REGULATOR (REBUIIX-EXCHANGE) 08722-60011 BD ASSY-POST REGULATOR (8722D) BD ASSY-SOURCE CONTROL 08720-60129...
Page 358 Description Ref. option Number NOT SHOWN (see ‘Cables, Front”) 5086-7519 5086-6519 5086-7974 5086-6974 5086-7615 ASSY-SUPER M/A/D/S (8722D) (REBUIIX-EXCHANGE) 5086-6980 BD ASSY-SOURCE INTERFACE ASSY-DIRECTIONAL COUPLER (8719DI8720D) 5086-7968 ASSY-DIRECTIONAL COUPLER (8722D) 5086-7518 NOT SHOWN (see ‘Cables, Front”) NOT SHOWN (see “Cables, Front”) NOT SHOWN (see “Cables, Front”) 1826-0423 Replaceable Parts 13.7...
Page 359 Major EP 8719D/20D Assemblies, ‘lbp...
Page 360 Major EIP 8722D Assemblies, ‘lbp Replaceable Parts 134...
Page 361 Ref. option Description Number 0 8 7 2 0 - 6 0 1 4 0 1 BD ASSY-CPU (F/W REV &XX AND BELOW) CPU REPAIR KIT (F/W REV 7.xX AND ABOVE) 0 8 7 2 0 - 6 9 2 6 3 1 CPU REPAIR KlT (F/W REV 7.xX AND ABOVE) 3 v 1.2AH 1420-0338...
Page 362 Major Assemblies, Bottom Replaceable Parts 13-11...
Page 363 Major Assemblies, Bottom Replaceable Parts...
Page 364 Cables, Top Description Number (part of A16) 0 8 7 2 0 - 2 0 0 1 4 0 8 7 2 0 - 6 0 1 4 1 0 8 7 2 0 - 2 0 0 1 5 0 8 7 2 2 - 2 0 0 1 7 0 8 7 2 0 - 2 0 0 6 8 0 8 7 2 0 - 2 0 0 6 3...
Page 365 13-14 Replaceable Parts...
Page 366 HP 8722D Cables, ‘Ibp Replaceable Parts...
Page 367 Cables, Bottom Ref. Description Number 085,089 08722-20058 085,089 08720-20174 08722-20064 08720-20147 08722-20134 08720-20026 08722-20076 08720-20025 08722-20057 08720-20248 08722-20077 08720-20011 08722-20074 08722-20078 08722-20072 08722-20076 08720-20033 085,089 Replaceable Parts...
Page 368 Description Number 08720-20041 08722-20062 08720-20173 08722-20054 08720-20171 08720-20174 08722-20064 08720-20103 08720-20075 08722-20024 08722-20085 08720-20158 Replaceable Parts 13.17...
Page 369 Cables, Bottom...
Page 370 Cables, Bottom Replaceable Parts 13-18...
Page 371 Cables, Bottom...
Page 372 Cables, Bottom Replaceable Parts 13-21...
Page 373 Cables, F’ront Description Number BD ASSY-GSP BD ASSY-DISPLAY INTERFACE (NOT SHOWN) 08720-60182 BD ASSY-LED 5087-7072 08720-20164 08722-20102 08720-20058 08720-20104 08722-20081 085,089 36 TO F’RONT PANEL R CHANNEL IN (871OD/872OD) 085,089 08722-20058 36 To A68 (8722D) 36 To A76 08720-20147 36 TO A76 08720-20047 OUT (871ODLZOD) 08720-20021...
Page 374 Ref. Description Number 08720-20162 08720-20163 08722-20104 012,085, 012,085, 08722-20099 012,085, 012,085, 08722-20101 08720-20169 08720-20171 08722-20055 08720-20103 Replaceable Parts 1323...
Page 375 Cables, Front 13-24 Replaceable Parts...
Page 376 Cables, Front Replaceable Parts 13-25...
Page 377 Cables, Rear Description Number 08722-20024 REAR PANEL SOURCE OUT To IN (W68 TO W6Q) (8722D) 08720-20135 08722-20085 08720-20144 08722-20084 VGA OUT TO A2212 8120-6382 8120-6379 1 3 - 2 6 ReplaceableParts...
Page 378 Ref. option Part Description Number NUT HEX l/4-32 2190-0067 WASHER LK .266 ID 1510-0038 GROUND POST Replaceable Parts 13-27...
Page 379 Front Panel Assembly, Inside Description Number 08720-40012 DISPLAY HOLD DOWN DISPLAY LAMP 08720-60160 ASSY-COLOR LCD (A18) DISPLAY GLASS WASHER LK .266 ID NUT HEX l/4-32 08720-60162 FRONT PANELASSY FRONT PANEGASSY FRONT PANEL -ASSY FRONT PANEGASSY 012,085 08720-60165 GASKET 1990-1864 08720-40010 FLUBBER KEYPAD 0515-0372 8120-6892...
Page 380 Front Panel Assembly, Inside Replaceable Parts 13-28...
Page 381 Rear Panel Assembly Ref. Description Number ASSY-FUSE BD AMY-REAR PANEL INTERFACE (A16) ASSY-FAN 1251-2942 FASTENER CONN RP LOCK 2190-0034 WASHER lx .104lDlO NUT STDF .327L 0-32 1251-2942 FASTENER CONN RP LOCK 0515-2040 SCREW SMM 3.6 16 F’CFTTX SCREW SMM 3.0 8 CWPNTX FAN GUARD NUT SPCL la-28 0515-0372...
Page 382 Rear Panel Assembly Replaceable Parts 13-31...
Page 383 Rear Panel Assembly, Option lD5 Description o p t i o n Number 0515-0374 SCREW-MACHINE M3.0~ 10 CW-PN-TX WASHER-FLAT .606ID NY WASHER-LOCK .606ID SCREW-MACHINE M3.0~ 6 CW-PN-TX BD ASSY-HIGH ST4BILlTY FREQ REF 8120-6458 RP INTERFACE (A16J3) to HIGH-STABLfN FREQ REF (A26Jl) 13-32 Replaceable Parts...
Page 384 Rear Panel Assembly, Option lD5 Replaceable Parts 13-33...
Page 385 Hardware, Top Ref. option Part Description Number 08720-40004 LOCATOR HOLD DOWNS CAN HOLD DOWN PC STABIUZER CAP 08720-40001 SCREW SMM 3.6 6 CWPNTX 0515-0431 SCREW SMM 3.0 6 CWPNTX 08720-00023 SOURCE HOLD DOWN 08720-00038 SOURCE COVER SCREW SMM 3.6 8 PC- SOURCE CASTING 13-34 Replaceable Parts...
Page 387 Hardware, Bottom Description Ref. Number 0515-0430 0515-0433 0515-0430 0515-1400 2200-0105 0515-0665 0515-0430 08720-00113...
Page 388 Replaceable Parts 13-37...
Page 389 Hardware, Front Ref. option Description Number 0515-0382 SCREW SMM 4.0 12 CWPNTX 08720-00021 DISK DRIVE BRACKET SCREW SMM 2.5 6 CWPNTX 08720-00077 ACTUATOR SWITCH ARM 08720-40014 AC LINE BUTI0N 0515-0430 SCREW SMM 3.0 6 CWPN’IX 0515-2086 SCREW SMM 4.0 7 PCFU’X SCREW SMM 3.5 8 PCFXI’X CABLE MOUNTlNG BRACKET 5022-1087...
Page 390 Hardware, Preregulator Description R e f . option 2110-0780 FUSE 3A 250 V NON-TIME DELAY 08753-00065 SCREW-MACHINE M3.6~ 8 CW-F’LTX PREREGULATOR-ASSY (REBUIIX-EXCHANGE) Replaceable Parts 13-39...
Page 391 Chassis Parts, Outside Ref. Option Part Description Number 6041-9176 1 COVER-TOP 4 SCREW SMM 3.6 8 PCPNTX 2 REAR CAP-SIDE STRAP 4 SCREW SMM 5.0 10 PCFLl’X 2 SIDE STRAP 08720-00081 2 COVER-SIDE 08720-00080 6041-9186 2 FRONT CAP-SIDE STRAP 2 FOOT ELEVATOR 1 3 4 0 ReplaceableParts...
Page 392 Chassis Parts, Inside option Description Number 5022-1190 0515-0375 SCREW SMM 3.0 16 CWPNTX 08720-00076 MEMORY DECK 0515-0458 SCREW SMM 3.5 8 CWPNTX 0515-2086 SCREW SMM 4.0 7 PCFXl’X 08720-20131 08720-60170 BD ASSY-MOTHERBOARD Replaceable Parts 1341...
Page 393 08720-90282 HP 8763D EXAMPLE PRCGRAM DISK #l HP BASIC HP 8763D EXAMPLE PROGRAM DISK #2 QUlCKC AND QUICK BASIC HP 87lOD/8720Dt8722D PROGRAMMER’S GUIDE 08720-90293 HP 8719Dl8720Dl8722D USER’S GUIDE (h&&s HP 8719D/8720D/8722D INSTALLATION/QUICK START GUIDE 08720-90291 1 3 4 2 ReplaceableParts...
Page 394 Description Number Upgrade Kits FIRMWARE UPGRADE KIT MECHANICAL TRANSFER SWITCH UPGRADE KIT1 OPTION 007 TIME DOMAIN CAPABILITY UPGRADE KlT’ OPTION 010 OPTION 012 HIGH-POWER S-PARAME TER TEST SET UPGRADE KIT’ OPTION 085 OPTION 089 HIGH-STABILITY F’REQUENCY REFZREN CE UPGRADE KIT1 OPTION 400 Protective Caps for Ckmnectors FEMALE HP-IB CONNECTOR...
Page 395 Description Number ESD Supplies ADJUSTABLE ANTlSTAmC WRIST STRAP 5 IT GROUNDING CORD 2 x 4 FT ANTISTATIC TABLE MAT WITH 15 FT GROUND WIRE ANTISTATIC HEEL STRAP for use cm c7imdw-?tivefloors Other SYSTEM RACK KIT, AISO ORDER THE FOLLOWING: HP 86043D FILLER PANEL? INCH HP 40104A RACK MOUNT FLANGE KlT,...
Page 396 inside diameter A .........assembl y input/output B .
Page 397 Assembly Replacement and Post-Repair Procedures This chapter contains procedures for removing and replacing the major assemblies of the HP 8719D/8720D/8722D network analyzer. A table showing the corresponding post-repair procedures for each replaced assembly is located at the end of this chapter.
Page 398 Replacing an Assembly The following steps show the sequence to replace an assembly in an HP 1. Identify the faulty group. Refer to Chapter 4, “Start Troubleshooting Here.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly. 2.
Page 399 Procedures Described in this Chapter The following pages describe assembly replacement procedures for the HP 8719D/8720D/8722D assemblies listed below: Line Fuse Covers Front Panel Assembly Front Panel Interface and Keypad Assemblies Display Lamp and Assembly Rear Panel Assembly Rear Panel Interface Board Assembly...
Page 400 Line Fuse small slot screwdriver Removal Warning For continued protection against tie hazard, replace fuse only with same type and rating (3 A 250 V F). The use of other fuses or materials is prohibited. 1. Disconnect the power cord. 2.
Page 401 Assembly Replacement and Post-Repair Procedures...
Page 402 Covers 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 403 Covers Assembly Replacement and Post-Repair Procedures...
Page 404 Front Panel Assembly Tools Required 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 405 Front Panel Assembly...
Page 406 Front Panel Interface and Keypad Assemblies Tools Required 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). 2. Remove the ribbon cable (item 1) from the front panel interface. 3.
Page 407 Front Panel Interface and Keypad Assemblies Assembly Replacement and Pest-Repair Procedures...
Page 408 Display Lamp and Assembly Tools Required small slot screwdriver Removal 1. Remove the front panel assembly (refer to “Front Panel Assembly” in this chapter). 2. Remove the three screws (item 1) that attach the display to the front panel. 3. Remove the four screws (item 2), disconnecting the accessories from the display.
Page 409 Display Lamp and Assembly Assembly Replacement and Post-Repair Procedures...
Page 410 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 analyzer has option lD5, remove the BNC jumper from the high stability frequency reference (item 3).
Page 411 Rear Panel Assembly 11. Pull the rear panel away from the frame. Disconnect the ribbon cable (item 12) from the motherboard connector, pressing down and out on the connector locks. Disconnect the wiring harness (item 13) from the motherboard. Replacement 1.
Page 412 Rear Panel Interface Board Assembly 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-stability frequency reference jumper (item 1).
Page 413 Rear Panel Interface Board Assembly Assembly Replacement and Post-Repair Procedures 14-17...
Page 414 Source Assemblies Tools Required 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 front panel (refer to “Front Panel Assembly” in this chapter). Remove the source module cover.
Page 415 Source Assemblies 12. Remove the three screws (item 1) that attach the source module to the analyzer. 13. Disconnect the cables (item 2) and (item 3 for all but Option 400) from the M/AID/S. 14. Remove the four screws (item 4) and (item 5) from the source module bracket.
Page 416 Source Assemblies Replacement 1. Reverse the order of the removal procedure. Note When replacing the A9 source control board, push the board evenly on ah the microcircuit pins. Check all the pin sockets from the back of the A9 board to ensure that all of the pins are inserted.
Page 417 Source Assemblies Assembly Replacement and Post-Repair Procedures 14-21...
Page 418 ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord. 2. Remove the four bottom feet and bottom cover (refer to “Covers” in this chapter). 3. Remove the four screws (item 1) on the rear panel. 4. Turn the analyzer over and remove the screw (item 2) that secures the CPU board to the deck.
Page 419 Assembly Replacement and Post-Repair Procedures 14-23...
Page 420 Tools Required ESD (electrostatic discharge) grounding wrist strap soldering iron with associated soldering tools Removal 1. Remove the A7 CPU board (refer to “A7 CPU Board Assembly” in this chapter). 2. Unsolder and remove A7BTl from the A7 CPU board. Warning Battery A7BTl contains lithium.
Page 421 Assembly Replacement and Post-Repair Procedures...
Page 422 A 15 Preregulator Assembly Tools Required ESD (electrostatic discharge) grounding wrist strap Removal 1. Remove the rear panel (refer to “Rear Panel Assembly” in this chapter). 2. Disconnect the wire bundles (item 1) (item 2) from the analyzer. 3. Remove the preregulator (A15) from the frame. Replacement 1.
Page 423 A 15 Preregulator Assembly Assembly Replacement and Pest-Repair Procedures...
Page 424 ESD (electrostatic discharge) grounding wrist strap Removal 1. Disconnect the power cord and remove the front panel (refer to “Front Panel Assembly” in this chapter). 2. Disconnect the two ribbon cables (item 1) and (item 2). 3. Remove the two screws (item 3) that attach the GSP to the front of the analyzer.
Page 425 Assembly Replacement and Post-Repair Procedures...
Page 426 T-S TORX screwdriver small slot screwdriver ESD (electrostatic discharge) grounding wrist strap Required Diskette 3.5” diskette, 1.44 MB, formatted (DOS) Removal 1. Disconnect the power cord and remove the top, bottom, and left side covers (refer to “Covers” in this chapter). 2.
Page 427 14-31 Assembly Replacement and Post-Repair Procedures...
Page 428 Replacement 1. Attach the plug (part number 08753-40016) to the new disk drive with a #2 hex screw (part number 0515-1048). 2. Attach the disk-drive bracket (part number 08753-00152) to the disk drive with the three remaining #2 socket-head screws. Note Place the disk drive on a horizontal and flat surface when attaching the bracket.
Page 429 10. Finish the front panel replacement procedure by fastening the remaining screw (top left) to the front panel. 11. Replace the covers (refer to “Covers” in this chapter). 12. Connect the line cord and turn the analyzer on. Test the disk drive by saving and recalling a fle.
Page 430 Assemblies ESD (electrostatic discharge) grounding wrist strap Removal 1. Remove the bottom cover (refer to “Covers” in this chapter). 2. Remove the front panel (refer to “Front Panel Assembly” in this chapter). 3. Reaching the connections from the bottom of the analyzer, disconnect the four RF cables attached to the couplers: two from the back of the couplers and two from between the couplers.
Page 431 14-35 Assembly Replacement and Pest-Repair Procedures...
Page 432 Assembly Tools Required 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 “10 MI-Iz PRECISION REFERENCE”...
Page 433 14-37 Assembly Replacement and Pest-Repair Procedures...
Page 434 Bl Fan Assembly 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 435 Assembly Replacement and Post-Repair Procedures...
Page 436 Post-Repair Procedures The following tables list 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. Adjustments/ Replaced Assembly...
Page 437 Replaced Assembly Correction constants (ch. 3) System Verification None Dynamic Range Test System Verification Internal Test 17 IF AmpIifler CC (Test 47) System Verification Frequency Range and Accuracy All Phase Lock Source Pretune CC (Test 43) System Verification Frequency Range and Accuracy Reference Assembly VC0 Tune Frequency Accuracy Frequency Range and Accuracy...
Page 438 Replaced Adjustments/ Assembly Correction Constants (Ch. 8) None None Observation of Display Processor Tests 59-76* None Operation Checkt Interface Power Level Test Output Power Adjustments Assembly Frequency Range and Accuracy Source Pretune Power Level Test (HP 8722D Gnly) Frequency Range and Accuracy Power Level lbst Frequency Range and Accuracy None...
Page 439 Replaced Verification Assembly System Vetication Sampler Checkt System Verification Power Adjustment Power Level %st Sampler Checkt System Verification Sampler Checkt System Verification None Operation Checkt Attenuator None Operation Checkt None Operation Checkt (HP 8722D Only) None Operation Checkt None Operation Checkt Switch 1443 Assembly Replacement and Post-Repair Procedures...
Page 440 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 441 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 anti-static packaging materials.
Page 442 UNITED STATES Instrument Support Center Hewlett-Packard Company (800) 403-0801 EUBOPEAN FIELD OPEBATIONS Headquarters France Hewlett-Packard S.A. Hewlett-Packard France Hewlett-Packard GmbH 1 Avenue Du Canada Hewlett-Packard Strasse Zone D’Activite De Courtaboeuf 61352 Bad Homburg v.d.H Switzerland Germany France (49 6172) 16-O (33 1) 69 82 60 60 Great Britain Hewlett-Packard Ltd.
Page 443 Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. 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 444 General Safety Considerations Safety Earth Ground Warning This is a Safety Class I product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor, inside or outside the instrument, is likely to make the instrument dangerous.
Page 445 Warning personnel only. To avoid electrical shock, do not perform Warning The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the instrument from all voltage sources while it is being opened. Warning Adjustments described in this document may be performed with power supplied to the product while protective covers are removed.
Page 446 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 Maschinenlaermrerordung -3. GSGV Deutschland). Operator Position am Arbeitsplatz Normal Operation normaler Betrieb per IS0 7779 Safety and licensing...
Page 447 In any measurement, certain measurement errors associated with the system add uncertainty to the measured results. This uncertainty defines how accurately a device under test (DUT) can be measured. Network analysis measurement errors can be separated into two types: raw and residual.
Page 448 Sources of Measurement Errors Sources of Systematic Errors The residual (after measurement calibration) systematic errors result from imperfections in the calibration standards, the connector interface, the interconnecting cables, and the instrumentation. All measurements are affected by dynamic accuracy and frequency error effects. For reflection measurements, the associated residual errors are effective directivity, effective source match, and effective reflection tracking.
Page 449 Connector repeatability is the random variation encountered when connecting a pair of RF connectors. Variations in both reflection and transmission can be observed. The listing below shows the abbreviations used for random errors in the error models and uncertainty equations. Rnt = raw noise on trace (rms) Rnf = raw noise on floor (rms) Crrl = port 1 connector reflection repeatability error...
Page 450 Measurement Uncertainty Equations Any measurement result is the vector sum of the actual test device response plus all error terms, The precise effect of each error term depends on its magnitude and phase relationship to the actual test device response. When the phase of an error response is not known, phase is assumed to be worst case generally combined in a root-sum-of-the-squares (RSS) manner.
Page 451 where Efnf = effective noise floor Crtl = connector repeatability (transmission) Crrl = connector repeatability (reflection) Ctml = cable 1 transmission magnitude stability Crml = cable 1 reflection magnitude stability Dmsl = drift magnitudePC source to port 1 Efs = effective source match error Efr = effective reflection tracking error Efl = effective load match error Efd = effective directivity error...
Page 452 Transmission Uncertainty Equations Transmission Magnitude Uncertainty (Etm) An analysis of the error model, located at the end of this appendix, yields an equation for the transmission magnitude uncertainty. The equation contains terms under the radical are random in character and are combined on an RSS basis.
Page 453 The detailed equation for each of the above terms is derived from the signal flow model, located at the end of this appendix. Transmission Phase Uncertainty (Etp) Transmission phase uncertainty is calculated from a comparison of the magnitude uncertainty with the test signal magnitude. The worst case phase angle is computed.
Page 454 “Specifications and Measurement Uncertainties” chapter in the HP 8719D/ZOD/‘ZD Network following pages explain how to determine the residual errors of a particular system and combine them to obtain total error-corrected residual uncertainty values, using worksheets provided.
Page 455 Other Error lbrms. Depending on the connector type in your system, refer to residual error specifications in the “Specifications and Measurement Uncertainties” chapter HP 8719D/ZOD/ZZD Ndwork Anul~zer User’s linear magnitude of the remaining error terms. Combining Error ‘lbrms. Combine the above terms using the reflection or transmission uncertainty equation in the worksheets.
Page 456 Characteristic Vdues ‘lhble Crrl = Port 1 Reflection Connector Repeat Crtl =Port 1 Transmission Connector Repeat Crm l-Cable Refl Mag Stability Port 1 Cpf 1 -Cable Phase Stability Port 1 & Port 2 D msl,z-Magnitude Drift D ns, ,-Phase Drift Determining System Measurement Uncertainties...
Page 457 Measurement Uncertainty Worksheet (1 of 3) Symbol dBV.ue Linear Vahw Error Term Directivity Reflection Tracking Transmission Tracking Dynamic Accuracy (Magnitude) Noise Floor High Level Noise Connector Reflection F&peatability Port 1 Connector Transmission Repeatability Port 1 Magnitude Drift Due to ‘kmperature Phase Drift Due to lbmperature Phase Drift Due to ‘Jkmperature and Frequency Dpfsl,2 Cable Reflection Stabiity...
Page 461 A-l 6 Determining System Measurement Uncertainties...
Page 462 10 MHz precision reference Oscilloscope, 7-12 assembly replacement, 14-36 part numbers, 13-32 theory of operation, 12-4 digital control, 12-11 digital control, 12-10 4 MHz Check, 8-3 power, 12-7 digital control, 12-10 theory of operation, 12-5 6-22 Al front panel digital control, 12-8 digital control, 12-8 digital control, 12-11 All Phase Lock, 10-31, 12-15...
Page 463 12-21 ADC offset correction constants (test 48), 3-14 analog bus correction constants (test 44), 3-12 fractional-N spur avoidance and FM sideband, 3-49 frequency accuracy, 3-45 digital control, 12-8 IF amplifier correction constants (test 47), 3-13 initialize EEPROMs (test 53), 3-35 option numbers correction constants air flow detector, 12-6 (test 50), 3-17...
Page 464 analyzer options available, l-6 BATTERY LOW! STORE SAVE REGS analyzer verification, 2-l TO DISK, lo-41 assemblies Blanking Adj, lo-18 bottom view, 13-10 Blanking Adjustment, 3-33 part numbers, 13-6-10 block diagram rebuilt-exchange, 13-3 digital control group, 6-3 top view, 13-6 power supply, 5-23 assembly replacement, 14-1 power supply functional group, Broadband Phase Lock Problems,...
Page 465 care of connectors, l-4 Check Al4 Fractional-N Checks With CC procedures ADC offset (test 48), 3-14 check front panel cables, 6-24 analog bus (test 44), 3-12 Check Open Loop Power, 7-8 IF amplifier (test 47), 3-13 Check the Analyzer Internal Tests, initialize EEPROMs (test 53), 3-35 2 - 6 option numbers (test 50), 3-17...
Page 466 CORRECTION CONSTANTS NOT STORED, lo-43 CORRECTION TURNED OFF, lo-43 Al front panel, 12-8 counter, lo-27 COUNTER OFF, lo-28 digital signal processor, 12-10 EEPROM, 12-9 digital control, 12-8 CPU operation check, 6-8 main CPU, 12-9 main RAM, 12-9 CPU waIking one pattern, 6-19 CURRENT PARAMETER NOT IN CAL theory of operation, 12-7 SET, lo-43...
Page 467 DSP ALU, lo-13 DISK: not on, not connected, wrong DSP Control, lo-13 addrs, lo-44 DSP Intrpt, lo-13 DISK READ/WRITE ERROR, lo-45 DSP RAM, lo-13 INITIALIZATION FAILED, lo-46 DSP Wr/Rd, lo-12 INSUFFICIENT MEMORY, PWR MTR CAL OFF, lo-46 NO CALIBRATION CURRENTLY IN EDIT, 10-8 PROGRESS, lo-46 edit list menu, 10-8...
Page 468 PWR MTR: NOT ON/CONNECTED fan troubleshooting, 5-20 OR WRONG ADDR, lo-51 fan voltages, 5-20 SAVE FAILED. INSUFFICIENT faulty analyzer repair, 4-2 MEMORY, lo-53 faulty cables, 9-l SELF TEST #n FAILED, lo-53 faulty calibration devices or SOURCE POWER TURNED OFF, connectors, 9-l faulty group isolation, 4-10 RESET UNDER POWER MENU, 10-53...
Page 469 position the A7 Jumper/Switch, digital control, 12-10 repair the analyzer, 4-l retrieve correction constant data hardkeys, 10-l from EEPROM backup disk, hardware 3-38 bottom view, 13-36 troubleshoot, 4-l front view, 13-38 troubleshoot accessories, 9-l part numbers, 13-34-39 troubleshoot digital control group, preregulator, 13-39 top view, 13-34 troubleshoot receiver, 8-l...
Page 470 internal tests, 10-4, 10-9 Main VRAM, 10-6, lo-19 INTERNAL TESTS, 10-5 Interpreting the Verification Results, bottom view, 13-10 2-32 part numbers, 13-6-10 inverter rebuilt-exchange, 13-3 digital control, 12-11 top view, 13-6 invoking tests remotely, lo-38 measurement calibration coefficients, Isolate the Fault in the RF Path, 9-4 isolation (crosstalk, EXF and EXR), Measurement Calibration Procedure, 11-12...
Page 471 DISK MESSAGE LENGTH ERROR, PRINTER: not on, not connected, wrong addrs, lo-52 DISK: not on, not connected, wrong PWR MTR: NOT ON/CONNECTED addrs, 10-44 OR WRONG ADDR, lo-51 DISK READ/WRITE ERROR, lo-45 SAVE FAILED. INSUFFICIENT error, lo-40 MEMORY, lo-53 INITIALIZATION FAILED, lo-46 SELF TEST #n FAILED, lo-53 NO CALIBRATION CURRENTLY IN SOURCE POWER TURNED OFF,...
Page 472 NRM and AI.T jumper/switch position OVERLOAD ON INPUT A, POWER adjustment, 3-8 REDUCED, lo-48 number (option) adjustment, 3-17 OVERLOAD ON INPUT B, POWER number (serial) adjustment, 3-15 REDUCED, lo-48 OVERLOAD ON INPUT R, POWER REDUCED, lo-49 offset (ADC) adjustment, 3-14 P?, 10-51 open and short device verification, panel key codes, 6-22...
Page 473 display power, 12-7 preregulator green LEDs, 12-6 theory of operation, 12-4 shutdown circuit, 12-6 preregulator LEDs check, 4- 11 theory of operation, 12-6 preregulator voltages, 5-10 variable fan circuit, 12-6 Preset, 10-9 post regulator test point locations, preset sequence, 4-3 Pretune Cor., lo-17 post-repair procedures, 3-3, 14-40 preventive maintenance, 1 l-l...
Page 474 NOT ON/CONNECTED OR WRONG chassis, outside, 13-40 ADDR, lo-51 documentation, 13-41 ESD supplies, 13-43 front panel, inside, 13-28 rack mount flange kit with handles front panel, outside, 13-27 option, l-7 fuse, preregulator, 13-39 rack mount flange kit, without fuses, post regulator, 13-43 handles, option, l-7 fuses, rear panel, 13-30 rear panel...
Page 475 self diagnose softkey, 10-9 Source Group Theory, 12-12 self-test, 4-3 source match (ESF and ESR), 11-10 SELF TEST #%I FAILED, lo-53 SOURCE POWER TURNED OFF, sequence check for power up , 4-12 RESET UNDER POWER MENU, 10-53 serial number correction constants Source Pretune, 12-14 adjustment, 3-15 source pretune correction constants...
Page 476 TEST OPTIONS, 10-7 test options menu, 10-7 table of service tools, l-l Test Pat l., lo-19 Temperature and Humidity, Check Test Pat lo., 10-21 the, 2-5 Test Pat ll., lo-21 temperature check, 5-13 Test Pat 12., 10-21 terms for test status, 10-5 Test Pat 13., lo-21 test 43, 3-10, lo-17 Test Pat 14-15., lo-21...
Page 477 preregulated voltages, 12-5 variable fan circuit, 12-6 variable fan circuit, 12-6 Theory of Operation, 12-1 VCO Tune Adjustment, 3-43 tools for service, l-l transmission tracking (ETF and ETR), Ver Dev 2., lo-16 11-14 Ver Dev 3., lo-16 TROUBLE! CHECK SETUP AND Ver Dev 4., lo-16 START OVER, lo-54 Verification Device Measurements,...

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