HP 8560A User Manual

Service ManualHP 8560A Spectrum AnalyzerSERIAL NUMBERSPrefix 3207A and AboveEiiaHEWLETTPACKARDHP Part No. 08560-90081Printed in USAAugust 1992

Track and Hold...A3 Assembly’s ADC Circuits...ADC Control Signals...ADC Start/Stop Con

18. 600 MHz Amplitude AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestThere is no related performance test for this adjustment proce

18. 600 MHz Amplitude Adjustment4. Press (INSTR PRESET) on the HP 8566 and set the controls as follows:START FREQ. . . . . . . . . . . . . . . . . . .

19. 10 MHz Reference Adjustment (Option 003)Assembly AdjustedA21 OCXO AssemblyNoteReplacement oscillators are factory adjusted after a complete warmup

19. 10 MHz Reference Adjustment (Option 003)SPECTRUMANALYZERFREOADJELECTRONICBNC CABLEBOTTOM-SIDE VIEWOF MAIN DECKFREQUENCYSTANDARD\/’.@ *OOOb10 MHzOU

19. 10 MHz Reference Adjustment (Option 003)2.Set the frequency counter controls as follows:3.4.FUNCTION/DATA . . . . . . . . . . . . . . . . . . . .

20. Tracking Oscillator Adjustment (Option 002)20. Tracking Oscillator Adjustment (Option 002)NoteThis is not a routine adjustment. This adjustment sh

20. Tracking Oscillator Adjustment (Option 002)Procedure1.2.Remove the A10 Tracking Generator Assembly as described in Chapter 3. With the A10Tracking

8.9.20. Tracking Oscillator Adjustment (Option 002)Record the frequency counter reading in Table 2-14 as Fl.On the HP 8560A, press MAN TRK ADJ , (255)

3Assembly ReplacementThis chapter describes the removal and replacement of all major assemblies. The followingreplacement procedures are provided:Page

Access to Internal AssembliesServicing the HP 8560A requires the removal of the spectrum analyzer’s cover assembly andthe folding down of six board as

A4 Assembly’s Cal Oscillator Circuit...Cal Oscillator Unlock at Beginning of IF Adjust...Inadequate CAL OSC AMPTD Range...

Procedure 1. Analyzer CoverProcedure 1. Analyzer CoverRemoval/Replacement1. Disconnect the line-power cord, and place the analyzer on its front panel.

Procedure 2. Al Front Frame/A18 CRTRemovalWarningThe voltage potential at A6AlW3 is +9 kV. Disconnect at the CRT with caution!Failure to properly disc

Procedure 2. Al Front Frame/Al8 CRTWarning The voltage potential at A6AlW3 is +9 kV. Failure to discharge A6AlW3correctly may result in severe electri

Procedure 2. Al Front Frame/Al8 CRT4 PLACESw47(OPT 002)W46(OPT 002)1/\\I,W42(STANDARD)5J15Figure 3-3. A9, A18, and Line-Switch Assembly Mounting Screw

Procedure 2. Al Front Frame/Al8 CRT22. Use a 9/16-inch nut driver to remove the dress nut holding the front-panel CAL OUTPUTconnector to the front pan

Procedure 2. Al Front Frame/Al8 CRTA18WlFFigure 3-5. Installing the CRT and Front-Frame AssembliesReplacementSK126NoteUse care when handling the glass

Procedure 2. Al Front Frame/Al8 CRTAIAIWISK127Figure 3-6. Placing the CRT into the Front Frame5. Connect A18Wl to A17J5.6. Snap CRT cable W9 onto the

Procedure 2. Al Front Frame/Al8 CRT15. Connect W36, coax 86, to the front-panel IF INPUT connector.16. Use a 5/16-inch wrench to connect W41 from the

Procedure 3. AlAl Keyboard/Front Panel KeysProcedure 3. AlAl Keyboard/Front Panel KeysRemoval1. Remove the front frame from the analyzer as described

Procedure 4. AlA RPGRemoval1. Remove the A9 Input Attenuator as described in Procedure 8, “A7 through Al3Assemblies.”2. Disconnect the RPG cable from

Unlocked Reference PLL...Operation...Troubleshooting...Third LO Driver Amplifier

Procedure 5. A2, A3, A4, and AS AssembliesProcedure 5.A2, A3, A4, and A5 AssembliesRemoval1. Remove the analyzer’s cover.2. Place the analyzer on its

Procedure 5. A2, A3, A4, and A5 AssembliesFigure 3-7. A2, A3, A4, and A5 Assembly RemovalSK129Replacement1. Place the analyzer top-side-up on the work

Procedure 5.A2, A3, A4, and A5 AssembliesWHITECOMPONENT SIDECOMPONENTBLACKW54REDw53BROWNW52WHITEWI-A2W27ORANGEA4w20BLUEW24GREENw54REDw20BLUEA19Wlw53BR

Procedure 5.A2, A3, A4, and A5 AssembliesW52w29WH I TEVIOLETW27ORANGEFigure 3-8. Assembly Cables (2 of 2)SK1313-18 Assembly Replacement

Procedure 5.A2, A3, A4, and A5 Assembliesw29W52W27 W23W25w22COAX 7 COAX 9 COAX 3 COAX 93 COAX 4 COAX 0 W6SK132Figure 3-9. Coaxial Cable Clip7. Check t

Procedure 5.A2, A3, A4, and A5 AssembliesAlAlWlA3 J602PJPA19WlSK133Figure 3-10. HP-IB and AlAl Wl Cable Placement3-18 Assembly Replacement

Procedure 6. A6 Power Supply AssemblyProcedure 6. A6 Power Supply AssemblyRemovalWarningThe A6 Power Supply and A6A1 High Voltage assemblies contain l

Procedure 6. A6 Power Supply Assembly16. Use a screwdriver to remove three standoffs from the A6 Power Supply assembly.17. Remove the A6 Power Supply

Procedure 6. A6 Power Supply Assembly7. Fold the A2, A3, A4, and A5 assemblies into the analyzer as described in Procedure 5, “A2,A3, A4, and A5 Assem

Procedure 7. A6Al High Voltage AssemblyRemovalWarningThe A6 Power Supply and A6Al High Voltage assemblies contain lethal voltageswith lethal currents

12. Display/Power Supply SectionTroubleshooting Using the TAM...Blank Display...Blank Display...

Procedure 7. A6Al High Voltage Assembly16. Disconnect ribbon cable A6AlWl from A6J5. See Figure 3-11.17. Remove the two screws (1) securing two board-

Procedure 7. A6Al High Voltage Assembly10. Fold the A2, A3, A4, and A5 assemblies into the analyzer and secure the analyzer coverassembly as described

Procedure 8. A7 through Al3 AssembliesProcedure 8. A7 through Al3 AssembliesA separate replacement procedure is supplied for each assembly listed belo

Procedure 8. A7 through Al3 Assembliesw44w39 W3A7W38FL1W56w45w47(OPTION002)FL2w33W46(oPTIor\I002)w43(OPT 10~002 )w57Al3w35WI0WI6A10(OPTION002)Figure 3

Procedure 8. A7throughAl3AssembliesGATE BIAWHITE/VIOLET (97)\GNDBLACKFigure 3-15. RF Section Bias Connections(0)SJ17Assembly Replacement 3-27

A7 1st LO Distribution AmplifierRemoval1. Remove the two screws securing the assembly to the analyzer’s center deck.2. Use a 5/16-inch wrench to disco

A8 Low Band MixerA8 Low Band MixerRemoval1. Disconnect W34 at A15A2J1, and place the analyzer upside-down on the work bench withAl4 and Al5 folded ou

A9 Input AttenuatorRemoval1. Disconnect W34 at A15A2J1, and place the analyzer upside-down on the work bench.2. Remove W41 and disconnect W44 from th

A10 Tracking Generator (Option 002)A10 Tracking Generator (Option 002)Removal1. Use a 5/16 inch wrench to remove the Tracking Generator’s RF OUT, LO O

All YTORemoval1. If the analyzer is an Option 002, remove the Tracking Generator before proceeding.2. Place the analyzer top-side-down on the work ben

Figuresl-1. Serial Number Label Example...l-2. Example of a Static-Safe Workstation...1-3. HP 8560A Shipping Container

Al3 Second ConverterAl3 Second ConverterCautionTurn off the analyzer’s power when replacing the Al3 Second ConverterAssembly. Failure to turn off the

Procedure 9. Al4 and Al5 AssembliesRemoval1. Remove the analyzer’s cover as described in Procedure 1, “Analyzer Cover.”2. Place the analyzer on its ri

Procedure 9. Al4 and Al5 AssembliesCautionDO NOT fold the board assemblies out of the analyzer one at a time. Alwaysfold the Al4 and Al5 assemblies as

Procedure 9. Al4 and A15 AssembliesAIAIWI8W32w2w49(OPTION 003)w50(OPTION 003)w40AliY\\W37w51W483(OPT 10~ 002)/I\WI4w37WI 1(OPTION 002)WIWI9(OPTION 001

Procedure 10. Al7 CRT DriverProcedure 10. Al7 CRT DriverRemoval1. Remove the analyzer’s cover assembly and fold out the A2, A3, A4, and A5 assemblies

Procedure 11. Bl FanRemoval/ReplacementWarningAlways disconnect the power cord from the instrument before beginning thisreplacement procedure. Failure

Procedure 12. BTl BatteryProcedure 12. BTl BatteryWarningBattery BTl contains lithium polycarbon monofluoride. Do not incinerate orpuncture this batte

Procedure 13. Rear Frame/Rear Dress PanelRemovalWarningThe A8 Power Supply and A6Al High Voltage assemblies contain lethal voltageswith lethal current

Procedure 13. Rear Frame/Rear Dress Panel15. Remove the two flathead screws securing the rear-panel battery assembly, and removethe assembly. Remove t

Procedure 13. Rear Frame/Rear Dress Panel4. Place the coax cable’s BNC connectors into the appropriate rear-frame holes as describedbelow. Use a 9/16-

3-15. RF Section Bias Connections . . . . . . . . . . . . . . . . . . . . .3-273-16. A9 Mounting Screws at Right Frame...3-17. A10 Track

\

Procedure 14. W3 Line Switch CableRemovalWarningDue to possible contact with high voltages, disconnect the analyzer’sline-power cord before performing

Procedure 14. W3 Line Switch Cable18. Fold out the Al4 and Al5 assemblies as described in Procedure 9, “Al4 and Al5Assemblies Removal,” steps 3 and 4.

Procedure 14. W3 Line Switch Cable21. From the top side of the analyzer, use contact removal tool, HP part number 8710-1791,to remove the four wires f

Procedure 14. W3 Line Switch CableCONNECTOR \L POSITION OFTIE WRAP KNUCKLEWIRE (98)WIRE (928)WIRE (8)WIRE (918)\ PLIJNGER PUSHES CONTACT OUT‘\CONNECTO

Procedure 14. W3 Line Switch CableReplacement (Using Contact Removal Tool, HP part number 8710-1791)1. Ensure that the action of the switch is working

Procedure 14. W3 Line Switch Cable6. Attach the line-switch assembly into the front frame using the captive panhead screw. Besure to connect the line-

Procedure 15. EEROM (A2U501)Removal/ReplacementCautionThe EEROM is replaced with the power on. Use a nonmetallic tool to removethe defective EEROM and

Procedure 16. A21 OCXO (Option 003)Procedure 16. A21 OCXO (Option 003)Removal1. Remove the rear-frame assembly as described in Procedure 13, “Rear Fra

Replaceable PartsThis chapter contains information on ordering all replaceable parts and assemblies. Locate theinstrument parts in the following figur

8-13. Faulty Crystal Short...8-14. Faulty LC Pole...8-15. Faulty Crystal Symmetry...8-

Direct Phone-Order SystemWithin the USA, a phone order system is available for regular and hotline replacement partsservice. A toll-free phone number

Table 4-2. Reference Designations, Abbreviations and Multipliers (1 of 4)AATBBTCCPCRDCDLDSEREFERENCE DESIGNATIONSAssembly F Fuse RTAttenuator, Isolato

Table 4-2. Reference Designations, Abbreviations, and Multipliers (2 of 4)DAP-GLDiallyl PhthalateGlassDBLDoubleDCDR DecoderDEG DegreeD-HOLE D-Shaped H

Table 4-2. Reference Designations, Abbreviations, and Multipliers (3 of 4)rNN Nano, NoneN-CHAN N-ChannelNH NanohenryNM Nanometer,NonmetallicNO Normall

Table 4-2. Reference Designations, Abbreviations, and Multipliers (4 of 4)ABBREVIATIONSU VAR Variable YVDC Volts-Direct CurrentUCD Microcandela YIG Yt

Table 4-3. Manufacturers Code List (1 of 3)Mfr. Manufacturer Name AddressCodeCO633 RIFA AB STOCKHOLM SWCl433 AB ELEKTRONICK GMBH SALZBURG AUD8350 GROS

Table 4-3. Manufacturers Code List (2 of 3)Mfr.Code15542158011581816179162991642817856183241861218873197012M62i240222422624355254032701428480290053004

Table 4-3. Manufacturers Code List (3 of 3)Mfr.Code6E2597027671744719847222873138763817855383701844119MOll9N171915069163792194928959690098978982919980

ReferenceDesignationHP PartNumber<:I:-Gi-1810-0118 1 11250-0780 5 1HP 10502P 9 18120-2682 2 18710-1755 9 35062-0800 5 15001-8739 75001-8740 05001-8

Table 4-4. Replaceable Parts (continued)Reference HP PartDesignationNumber0515-08890515-124160515-133155061-950195061-968500515-110628710-175595958-65

Tablesl-l. Service Kit Contents...l-2. Static-Safe Accessories...l-3. Hewlett-Packard Sales and Service Offi

Table 4-4. Replaceable Parts (continued)ReferenceHP PartC QtYDescriptionMfiMG PartDesignationNumber DCodeNumberAlAlSee Tbl A-l1 BD AY-KEYBOARD28480 Se

ReferenceDesignationAl3Al4HP PartNumber5086-7812See Tbl A-lAl5(Opt. 001)(Opt. 002)(Opt. 003)(Opt. 012)(Opt. 013)(Opt. 023)(Opt. 123)A15AlA15A2Al6Al7A1

Table 4-4. Replaceable Parts (continued)3Fl21 lo-07560FL10955-04203FL20135-03076119788929-iGr11111111112101212-DescriptionFAN ASSEMBLY (Includes Wire)

Table 4-4. Replaceable Parts (continued)ReferenceDesignationA4 AssemblyA5 Assembly114 AssemblyL15 AssemblyHP PartNumber5021-991:5021-991:5021-99145021

Table 4-4. Replaceable Parts (continued)KG-11111111111111-DescriptionCABLE ASSEMBLIESPOWER CABLE, RIBBONCONTROL CABLE, RIBBONCABLE ASSEMBLY LINE SWITC

Table 4-4. Replaceable Parts (continued)Description813353437IiII1Gir111111111111-CABLE ASSEMBLY, A10 ALCEXT (Rear Panel Jll to AlO)CABLE ASSEMBLY, COA

Table 4-4. Replaceable Parts (continued)iGr111111111111111DescriptionCABLE ASSEMBLY, COAX 92, INT 2ND IF(A13J2 to A15J801)CABLE ASSEMBLY, COAX 86, EXT

Table 4-4. Replaceable Parts (continued)ReferenceDesignationw51W52w53w54w55W56w57HP PartNumber5062-64785062-64775062-64765062-64755062-64715022-004950

4-20 Replaceable Parts

kernBOTTOM VIEWDescriptionSCREW-MACH M3 x 0.5 30MM-LG PAN-HDSCREW-MACH M3 x 0.5 GOMM-LG PAN-HDSCREW-MACH M3 x 0.5 lOOMM-LG PAN-HDWASHER-FL MTLC NO. 4

8-4. Available Reference Level Range...8-5. Signal Level for Reference Level Display...9-l. TAM Tests Versus Test Connect

4-22 Replaceable Parts

Parts List, Cover Assembly (See Figure 4-2)Item1234567891011121314151617181920HP PartNumber5041-89115041-89120515-11141460-21645021-63435021-63445021-

4-24 Replaceable Parts

Parts List, Main Chassis (See Figure 4-3)SCREW-MACH M3 X 0.5 8MM-LG PAN-HD SEMSMM 3.0 35 PCPDSSCREW-MACH M3 X 0.5 35MM-LG PAN-HD SEMWASHER-FL MTLC NO.

4-26 Replaceable Parts

Parts List, RF Section (See Figure 4-4)iGT221212123412112143-DescriptionSCREW-MACH M3 X 0.5 GMM-LG PAN-HDSCREW-MACH M3 X 0.5 GMM-LG PAN-HDSCREW-MACH M

4-28 Replaceable Parts

-[ten-12349101112131415161718192021222324252627282930313233343536-HP PartNumber0515-16225041-89061000-08970370-30693030-00222950-00432190-001638560-00

4-30 Replaceable Parts

Iten100515-0890110515-0898120590-1251131252-0995145001-8719 3150515-1461 2168160-0662 8175021-5479 8185021-6391 5192200-0104 3200515-1148 2210515-0898

General InformationThis HP 8560A Spectrum Analyzer Service Manual contains information required to adjustand service the HP 8560A Spectrum Analyzer to

4-32 Replaceable Parts

5Major Assembly and Cable LocationsIntroductionThis chapter identifies the module’s assemblies and cables and contains the following figures:PageFigur

AssembliesA19 HP-IB... ..Figure... ..5-4A20

Cables... ..FigureW34 First LO Samp. (Coax 0)...5-5, 5-6, 5-7W

Al5A3AIAIWIW25W23A3WlW6nnnu noon0000 0000noon noon/A3Figure 5-l. Hinged Assembliesw20COMPONENTW24W2w20A19Wl/\ *w53WlA2Figure 5-2. Top View (A2 Unfolde

@Copyright Hewlett-Packard Company 1990, 1992All Rights Reserved. Reproduction, adaptation, or translation without prior writtenpermission is prohibit

Manual Text ConventionsThe following text conventions are used throughout this manual:mBoxed text in this typeface represents a mechanical key physica

w54A4\w55W27Figure 5-3. Top View (A2 and A3 Unfolded)SK157Major Assembly and Cable Locations5-5

A5\W27A19Wl\A19w3W8w4w9WlW52/.//I\\\\w29AlAlWlA6AlA21Al6 Al7w55LSIA18(OPTION 003)SK158Figure 5-4. Top View (A2, A3, A4, and A5 Unfolded)5-6Major Assem

W2w49(OPTION 003)W50(OPTION 003)w40W22 \w31 -w37 -WI7 /W48 A(OPTION 002)/w3-3Figure 5-5. Bottom View (Al5 Unfolded)WI9(OPTION 001)W36(DELETED INOPTION

AIAIWI8W32/I\ ‘WI4A14wj7WI 1(‘OPT 10~Figure 5-6. Bottom View (Al5 and Al4 Unfolded)002)5-8Major Assembly and Cable Locations

w44w39w3 A7W38FL1W56w45w47(OPT ION002)FL2w33W46(OPT ION002)w43(OPTION002)w57Al3w35WI0WI6A10//\3\Al 1W42/(STANDARD), WI2- w34. w41A3\WI4(OPT 10~002 )(O

BlFigure 5-8. Rear ViewBTl/A205-10Major Assembly and Cable Locations

6General TroubleshootingIntroductionThis chapter provides information needed to troubleshoot the instrument to one of the sixmajor functional sections

Assembly Test PointsThe analyzer’s board assemblies contain four types of test points: post, pad, extendedcomponent lead, and test jack. Figure 6-l il

TEST POINTS ON BLOCK DIAGRAMJ4 (TESTTP3QTPITP2@AMPLIFIERJACK) \r:J4-MS8 /---(J4-15jTEST POINTS ON CIRCUIT BOARD ASSEMBLYTPI (POST),;_;::> TP2 cpAD;

D GNDD GNDA GNDD GNDWIPOWER CABLECONNECTIONS+5v+15v-15vPWR UPA GND-15v-15vA GND*SCAN RAMPNCA GND. 46 45l 44 43‘.42 41. 40 39l 38 37. 36 35l 34 33032 3

Instrument VariationsThe following text lists the unique assemblies contained in the HP 8560A Options 001, 002,003, and all combinations.HP 8560A Opti

/A2J6OAl5 . 15I I16. LOPT IDENTOAl4 0 1718 . OA13A3J401A3WlI NTERFACECABLECONNECTIONSAZJ5A19WlHPIB CABLECONNECTIONSREAR PANEL J3OD6. 9 .,D OD5D GNDi .

WR PROT/WR ENA Softkey MenusThe jumper on jack A2J12 is shipped from the factory in the WR PROT (write protect)position (jumper on pins 2 and 3). When

LELO % IF/IF ADJON OFFADJ CURRIF STATEFULLIF ADJREF LVLADJJMORE1 OF 2tiEiJLuPATTERNFREQDIAGNOSE7SERVICECAL DATAMORE2 OF 2FLATNESSSTOREDATAFigure 6-3.

Troubleshooting to a Functional Section1. Refer to Table 6-l for the location of troubleshooting information.2. If the HP 85629B Test and Adjustment M

Table 6-1. Location of Assembly Troubleshooting TexiInstrumentAssemblyAlAl KeyboardAlA RPGA2 ControllerA3 InterfaceA4 Log Amplifier/CalOscillatorA5 IF

Using the TAMWhen attached to the spectrum analyzer’s rear panel, the HP 85629B Test and AdjustmentModule (TAM)provides diagnostic functions for suppo

NoteThe HP 85629B Test and Adjustment Modules with firmware revision Aor B will not properly execute Automatic Fault Isolation on the HP 8560ASpectrum

Inconsistent ResultsMany of the signals measured by the TAM are digitally controlled. If inconsistent results areobtained, or if failures appear in un

ADC/lnterface CheckThe keyboard interface and strobe-select circuitry must be functioning correctly, since theseare required to operate the TAM. The T

printer is connected, press Print Page to provide a hard copy of the currently displayedscreen (the softkey labels will not be printed).Each test con

W46addedw47addedW48addedRear-panel J 11addedFront-panel 53deletedFront-panel J6addedHP 8560A Option 003 (Precision Frequency Reference)Al5 RF Assembly

Error MessagesThe spectrum analyzer displays error messages in the lower right-hand corner of the display.A number, or error code, is associated with

Error Message EliminationWhen an error message is displayed, always perform the following procedure.1. Press ISAVE] and SAVE STATE.2. Store the curren

124NOP IBLK125NOP STRNG126NO ?127BAD DTMD128PK WHAT?129PRE TERM130BAD TDF131?? AM/FM132!FAV/RMP133!INT/EXT134??? ZERO135??? CURR136??? FULL137??? LAST

LO and RF Hardware/Firmware Failures (300 to 399)YTO Loop Errors (300 to 301)300 YTO UNLKThese errors often require troubleshooting the Al4 Frequency

307 FREQ ACC308 FREQ ACC309 FREQ ACC310 FREq ACC311 FREQ ACC312 FREQ ACC313 FREQ ACC314 FREQ ACCTransfer oscillator pretuned DAC out of range. The tra

315 FREQ ACC316 FREQ ACCIndicates problems in the span calibration. Troubleshoot any unlocksbefore attempting to troubleshoot span calibration problem

324 FREQ ACC325 FREQ ACC326 FREQ ACC327 OFF UNLK328 FREQ ACC329 FREQ ACCUnable to adjust MAINSENSE 1c ose to 0 volts using the coarse adjustDAC. The c

YTO Leveling Loop (334)This error often requires troubleshooting the Al4 Frequency Controlassembly or A7 LODA (Synthesizer Section) or the ADC circuit

405RBW10K406RBW1OK407RBW10K408RBW10K409RBW10K410RBW1OK411RBW10K412RBW10K413RBW10K414RBW10K415RBW1OK416RBW10K417RBW3K418RBW3K419RBW3K420RBW 3K421RBW10K

425 RBW 3K426 RBW 3K427 RBW 3K428 RBW 3K429 RBW 100430 RBW 300431RBW 1K432 RBW 3K433RBW 10K434 RBW 300435 RBW 300436 RBW 300437 RBW 300438RBW 1K439RBW

Front-panel J6addedA21 OCXOaddedw49 addedw50addedHP 8560A Option 123 (001 + 002 + 003)Al5 RF Assemblyw19Rear-panel JlOA10 Tracking GeneratorFront dres

460 AMPL461 AMPL462 AMPL463 AMPL464 AMPL465 AMPL466 LIN AMPL467 AMPL468 AMPL469 AMPL470 AMPL471 RBW 30K472 RBWIOOK473 RBW 300K474 RBWIM475 RBW 30K476

495RBWIOK496RBW100497RBW100498RBW100499CALUNLK500AMPL30K501AMPL.lM502AMPL.3M503AMPL1M504AMPL30K505AMPL.lM506AMPL.3M507AMPLIM508AMPL30K509 AMPL .lMUnab

510 AMPL .3M511 AMPL IM512 RBW 100513 RBW 300514 RBWIK515RBW3K516RBWIOK517RBW100518 RBW300519 RBWIK520 RBW 3K521 RBW IOK522 RBW IOK523 RBW IOK524 RBW

531RBW(300532RBW<300533RBW<300534 RBW(300535RBW<300536RBW<300537RBW<300538RBW<300539 RBW <300540 RBW<300550LOG AMPL551LOG AMPL

564 LOG AMPL565 LOG AMPL566 LOG AMPL567 LOG AMPL568 LOG AMPL569 LOG AMPL570 LOG AMPL571 AMPL572 AMPL IM573 LOG AMPL574 LOG AMPL575 LOG AMPL576 LOG AMP

582 AMPL583 RBW 30K584 RBW IOOKUnable to adjust 100 kHz and 210 kHz Resolution Bandwidths. BadCALOSC Calibration in Sweep Rate. Test the 100 kHz Resol

585RBW 300K586 RBWIM587RBW 30K588 RBWIOOK589RBW 300K590RBWIM591LOG AMPL592LOG AMPL593LOG TUNE594 LOG OFST595LOG ATTN596 LOGFID597LOG OFST598 LOG OFST5

The EEROM on A2 is used to store data for frequency responsecorrection, elapsed time, focus, and intensity levels. Error codes from700 to 703 indicate

708 ROM U309709 ROM U310710 ROM U311Check-sum error of program ROM A2U309.Check-sum error of program ROM A2U310.Check-sum error of program ROM A2U311.

Model Number Error (719)If this error occurs, return the instrument to a service center forrepair.719 MODEL #?Could not read ID string from EEROM A2U5

HP 85629B Test and Adjustment ModuleWhen attached to the spectrum analyzer’s rear panel, the HP 85629B Test and AdjustmentModule (TAM)provides diagnos

Block Diagram DescriptionThe spectrum analyzer is comprised of the six main sections listed below. See Figure 6-4. Thefollowing descriptions apply to

RF SectionThe RF Section includes the following assemblies:A7 LODA (LO Distribution Amplifier)A8 Low Band MixerA9 Input AttenuatorA10 Tracking Generat

Al3 Second ConverterThe Al3 Second Converter down-converts the 3.9107 GHz 1st IF to a 310.7 MHz 2nd IF. Theconverter generates a 3.6 GHz second LO by

All YTO SpanwidthSweep Applied To20.1 MHz to 3.8107 GHzAll YTO’s main coil1.01 MHz to 20.0 MHzAll YTO’s FM coil100 kHz to 1 MHz Roller Oscillator PLL’

,- YTO PLL7/ROLLER OSCILLATOR PLL \1ST LO OUTPUT3.0 - 6.81 GHzIYTOIIIALt/ OFFSET LOCK LOOP?10 MHz TCXOSK168Figure 6-5. Phase Lock LoopsRoller Oscillat

The HP 8560A uses trace-data manipulation to generate the 5 dB/DIV scale from the10 dB/DIV scale. The A3 Interface Assembly amplifies and offsets the

An Automatic IF Adjustment, in analyzer firmware, sets center frequency and 3 dBbandwidth of all filter poles through varactor and PIN diodes. The fir

ADCThe HP 8560A uses a successive-approximation type of ADC. The ADC Algorithmic StateMachine (ADC ASM) controls the interface between the Start/Stop

EEROMThe EEROM stores important amplitude-related correction data. This includes data formixer-bias DACs, and RF Gain DACs (flatness correction). The

6-44 General Troubleshooting

Electrostatic DischargeElectrostatic discharge (ESD)can damage or destroy electronic components. Therefore,all work performed on assemblies consisting

ADC/lnterface SectionThe ADC/Interface Section includes the AlAl Keyboard, AlA RPG (rotary pulsegenerator), and A3 Interface assemblies.Table 7-l lis

Table 7-1. W2 Control Cable Connections (1 of 2)SignalA3J2 (pins) A4J2 (pins) A5J2 (pins) A14J2 (pins) A15J2 (pins,DO1* 150 1 1D GND2* 249 2 2Dl3* 348

Table 7-1. W2 Control Cable Connections (2 of 2)SignalA GNDSCAN RAMPVIDEO TRIGGERA GNDNCR/T DAC2R/T DACl43J2 (pins)44*4546*47*49*50** Indicates signal

Troubleshooting Using the TAMWhen using Automatic Fault Isolation, the TAM indicates suspected circuits that need to bemanually checked. Use Table 7-2

Table 7-2. Automatic Fault Isolation ReferencesSuspected Circuit Indicatedby Automatic Fault Isolation3heck ADC ASMCheck ADC MUX2heck ADC Start/Stop C

Table 7-3. TAM Tests Versus A3 Test ConnectorsConnector Manual ProbeTroubleshooting TestMeasured Signal LinesA3J105Video Input to InterfaceMS1Video to

Static-Safe AccessoriesTable 1-2. Static-Safe AccessoriesHP PartNumberDescription9300-0797 Set includes: 3M static control mat 0.6 m x 1.2 m (2 ft x 4

Keyboard/RPG ProblemsKeyboard InterfaceSee function block G of A3 Interface Assembly Schematic Diagram (sheet 3 of 6).A pressed key results in a low o

RPG InterfaceSee function block J of A3 Interface Assembly Schematic Diagram (sheet 3 of 6).U608B latches the RPG direction from the two RPG outputs,

Table 7-5. Counter FrequenciesA3U606 pin #Nominal Frequency (Hz)3390041950597564881124410122Triggering ProblemsSee function block H of A3 Interface As

8. If the voltage changes incorrectly, proceed as follows:a. Check the -10 Vdc reference (A3U409 pin 4).b. While using the front-panel knob to adjust

Flatness Control (RF Gain DACs)See function block M of A3 Interface Assembly Schematic Diagram (sheet 4 of 6).RF Gain DACs control the Al5 assembly’s

A3 Assembly’s Video CircuitsVoltages from A3JlOl to A3’s Variable Gain Amplifier correspond (approximately) toon-screen signal levels. (One volt corre

NoteThe on-screen amplitude level will probably not change as expected, since thevideo circuitry is assumed to be faulty.15. Monitor A3TP14 while step

22. Change the reference level from -10 dBm to 0 dBm. The voltage change on A3TP7should be between 670 mV and 730 mV. If the voltage change is outside

Video MUXSee function block U of A3 Interface Assembly Schematic Diagram (sheet 5 of 6).The AUX VIDEO port and the 0 SPAN CAL function are not used. B

4. Step the Video BW down to .1 Hz. At each step, the amplitude of the LO feedthroughshould decrease.5. Refer to Table 7-7 and check for correct latch

2. Install the front-panel cover on the instrument.3. Wrap the instrument in antistatic plastic to reduce the possibility of damage caused byelectrost

Positive/Negative Peak DetectorsSee function blocks Y and Z of A3 Interface Assembly Schematic Diagram (sheet 5 of 6).The following information pertai

8. If the reset pulses are absent, troubleshoot the Peak Detector Reset circuitry.9. If the reset pulses are present, check the gate of Q207. The puls

1. Press (%?i) on the HP 8560A and set the controls as follows:CENTER FREQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

i-Detector ModeSAMPLEPOS PEAKNEG PEAKTable 7-9. Logic Levels at A3U108U108 pin 1U108 pin 15U108 pin 16HLHH LLLH H5. Set the HP 8560A to the following

Variable Gain Amplifier (VGA)See function block AB of A3 Interface Assembly Schematic Diagram (sheet 6 of 6).The VGA provides adjustable gain in the v

A3 Assembly’s ADC CircuitsThe ADC consists of a 12-bit DAC, 12-bit successive approximation register (SAR), datamultiplexers, and data latches. The AD

ADC Start/Stop ControlSee function block B of A3 Interface Assembly Schematic Diagram (sheet 2 of 6).The ADC Start/Stop Control determines the start t

See function block F of A3 Interface Assembly Schematic Diagram (sheet 2 of 6).1. Press (=I) on the HP 8560A and set the controls as follows:SPAN. . .

NoteSince U512 pin 2 is at a virtual ground (currents are being summed at thisnode), voltage levels at this point are difficult to interpret.Ramp Coun

A3 Assembly’s Control CircuitsA digital control problem will cause the following three steps to fail.1. On the HP 8560A, press (-1, ATTEN MAN, 0, a, a

SK1126ItemDescription19211-5636208590-80013308590-80014HP Part NumberOuter CartonPads (2)Bottom TrayFigure 1-3. HP 8560A Shipping Container and Cushio

14. If any address or data line is low, check the appropriate input of either U405 (data lines)or U406 (address lines).15. If a data line input is stu

13. Monitor A3U401 pin 9 (LV_STB) with an oscilloscope or logic probe. This is the strobefor the A4 Log Amplifier/Cal Oscillator assembly.14. Press [w

8IF SectionThe IF Section contains the A4 Log Amplifier/Cal Oscillator and A5 IF assemblies.Troubleshooting Using the TAM...

300 Hz to 3 kHz Resolution Bandwidth Out of Specification...8-36Low-Pass Filter...

NoteBecause the Cal Oscillator circuitry on the A4 assembly is such an integralpart of the IF adjustment, always check this assembly first, before che

Table 8-1. Automatic Fault Isolation ReferencesSuspected Circuit Indicatedby Automatic Fault IsolationCheck Cal Oscillator on A4 AssemblyCheck Input S

Table 8-2. TAM Tests Versus Test Connectors (1 of 2)Zonnector Manual Probe Troubleshooting Test Measured Signal LinerA3J105 Video Input to Interface M

Table 8-2. TAM Tests Versus Test Connectors (2 of 2)ConnectorA5J7A5J8A5J9Manual Probe Troubleshooting TesRef 15 dB Attenuator Stage2nd Step Gain Stage

.-mm-----10 7 MHzICAL OSCi+lV DCJ3[_:IIILINEARIIIL---------IIF ADJ OFFiW54DISCONNECTED]+I- p-Iw54LOG34 ,‘-,JIu (RED) *PIWITH COUNTER ONiBURSTS OF 5.35

Sales and Service OfficesHewlett-Packard has sales and service offices around the world providing complete support forHewlett-Packard products. To obt

3. Set the other spectrum analyzer controls as follows:SPAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 8-3. Sweep Width SettingsSweep Width Sweep Time RES BW RANGE MA1 MAOAdjusted20 kHz 5 ms 10 kHz$5 V 0V 0V10 kHz 10 ms 3 kHz+5 V 0V +5v4 kHz 30 ms

Parameters AdjustedThe following IF parameters are adjusted in the sequence listed:1. AmplitudeA. Video Offsets: analog (using A4 Log Amplifier video

B. 10 kHz resolution bandwidth1. Center frequency of LC tank that loads the crystal2. Symmetry adjustment to cancel crystal case capacitance.3. Bandwi

Performance Test FailuresFailures in IF-Section-related performance tests may be investigated using the followinginformation.IF Gain Uncertainty Perfo

4. Set the signal generator controls as follows:Amplitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A4 Assembly’s Log Amplifier CircuitsThe Log Amplifier on the A4 assembly performs several functions. It provides log and linearpaths converting the 10

10. If log fidelity is poor near the bottom of the screen or the 1 MHz resolution bandwidth isnarrow, a fault might exist in the wide/narrow filter sw

Video OffsetRefer to function block P of A4 Log Amplifier Schematic Diagram (sheet 3 of 4) in theHP 856OA/6lB/63A Spectrum Analyzer Component Level In

9. Reconnect cables W54 to A4J6 and W52 to A4J8.Frequency Counter Prescaler/ConditionerRefer to function block Q of A4 Log Amplifier Schematic Diagram

CertificationHewlett-Packard Company certifies that this product met its published specifications at thetime of shipment from the factory. Hewlett-Pac

Table 1-3. Hewlett-Packard Sales and Service OfficesUS FIELD OPERATIONS EUROPEAN OPERATIONSHEADQUARTERSHEADQUARTERSHewlett-Packard Company Hewlett-Pac

CautionIf a dc block is not used, damage to the HP 8566A/B results. TheHP 8566A/B and many other spectrum analyzers have dc-coupled inputs andcannot t

f. Press (A--B)A), (FREQUENCY SPAN), 2 @). The response should now be displayedright-side up. Ignore any “wings”to the left and right of the passband.

Synchronous DetectorA wide dynamic range linear detector is realized by the Limiter (block G), the IsolationAmplifier (block H), the LO Amplifier (blo

Sum and difference frequencies are produced in the Detector/Mixer. The difference frequencyproduces video (dc to approximately 3 MHz), since the two s

A5 IF SectionThe input switch connects the IF to either the A4 Cal Oscillator or the 10.7 MHz IF outputfrom the Al5 RF assembly. The Automatic IF Adju

CautionDo not short power-supply voltages to ground. The analyzer power-supplycurrent limiting cannot protect the resistors in series with the power s

3. Set the HP 8566A/B controls as follows:REFERENCE LEVEL...j-10 dBmCENTERFREQUENCY...

REF 10.0 dBmATTEN 20 dB5 dB/SAMPLEI I I I I I I ICENTER 10.700 000 MHzSPAN 0 HzRES BW 300 kHz VBW 300 kHz SWP 500 msecSK174Figure 8-5. Detailed IF Adj

REF10.0 dBmATTEN 20 dB10 dB,’SAMPLECENTER 10.700 000 MHz SPAN 0 HzRES BW 300kHzVBW1kHzSWP 1.40setSK176REF10 dB/SAMPLErFigure 8-7. Detailed IF Adjust S

Table 1-4. Recommended Test EquipmentInstrumentSynthesizedSweeper(two required)Critical Specificationsfor Equipment SubstitutionFrequency Range: 10 MH

Common IF Signature Problemsn Region A of Figure 8-4 is noisy: Suspect the first LC pole.n Region B of Figure 8-4 is flat: Suspect the third step-gain

REF10.0 dBmATTEN 205 dB/SAMPLECENTER 10.700 000 MHzREF10.0 dBmATTEN 20 dl?5 dB/SAMPLEt-ISPAN Q1 HzRES BW 300 kHzVBW 300 kHzSWP 500 setSK179Figure 8-10

RE5 dB,’SAMPLECENTERF/ I”.; dBmi ATTEN 20 dB1II I I10.700 000 MHzSPAN 0 HzRES BW 300 kHz VBW 300 kHz SWP 500 setSK181Figure 8-12. Region B Amplitude O

*ATTEN l0dBRL OdBmlOdB/1I/I II11ICENTER 300.0000MHzSPAN 500 0kHz*RBW 1.0MHzVBW 1.0MHzSWP 50msSK182Figure 8-13. Faulty Crystal Short*ATTEN 10dBRL 0dBm1

30 kHz Resolution Bandwidth ProblemsShape factor too high: Shape factor is the ratio of the 60 dB bandwidth to the 3 dBbandwidth. Shape factor should

ATTEN 10dBRL OdBm10dB,’BIRoKEN JSYMME~~TRY 1CENTER 300.0000MHzSPAN 100 0kHz*RBW 3.0kHzVBW 3.0kHrSWP 70msSK184Figure 8-15. Faulty Crystal SymmetryStep

A4 Assembly’s Cal Oscillator CircuitThe Cal Oscillator on the A4 assembly supplies the stimulus signal for Automatic IFadjustments. Normally, the osci

Cal Oscillator Unlock at Beginning of IF Adjust1. Turn the spectrum analyzer luNE) switch off and then on. The words IF ADJUST STATUSappear on the dis

e. If the DVM reading is outside the range in step c but inside the range in step d, suspectone of the filter-reactive components.8. If the ALC loop i

Table 1-4. Recommended Test Equipment (continued)InstrumentCritical SpecificationsRecommended Usefor Equipment Substitution ModelMeasuringCompatible w

REF -43.0 dBmATTEN 10 dB1 dB,’CENTERFigure 8-17. Output Waveform, 3 kHz Resolution BandwidthFigure 8-17. Output Waveform, 3 kHz Resolution BandwidthRE

REF -43.0 dBmATTEN 10 dB1 dB/II III IL L\i\,I \I\ -&\ L- \ ‘- \, - ‘\ L \ - \ ~A&\IIIIIII IIICENTER 10.710 000 MHzSPAN 0 HzRES BW 10kHzVBW1kHz

Low-Pass FilterRefer to function block AB of A4 Cal Oscillator Schematic Diagram in theHP 856OA/61B/63A Spectrum Analyzer Component Level Information

3. Adjust the spectrum analyzer reference level and center frequency to display the 400 Hzmodulation frequency eight divisions peak-to-peak.4. On the

8-42 IF Section

9Controller SectionThe Controller Section includes the A2 Controller Assembly, A19 HP-IB Assembly, andBTl Battery. The presence of a display (graticul

Table 9-1. TAM Tests Versus Test ConnectorsConnector Manual Probe Troubleshooting Test Measured Signal LinesA2Jll ADC/MUX TestMSl, MS3 through MS6, MS

Table 1-4. Recommended Test Equipment (continued)Instrument20 dB FixedAttenuator10 dB FixedAttenuatorSignature MultimeterReference AttenuatorCritical

A2CONTROLLER(TAM TESTCONNECTOR)Figure 9-1. A2 Test ConnectorsSPi710. Press SOFT KEY #4. The results will be sent to the printer.11. If a failure is in

Digital Signature Analysis (DSA)Digital Signature Analysis (DSA) places microprocessor, A2U1, in a simplified knownstate. This simplified state consis

5. Compare the signals at the following test points with those illustrated in Figure 9-2.X POS: A2J202 pin 14Y POS:A2J202 pin 3Z OUT: A2J201 pin 3BLAN

4. Compare the blanking-circuit input signals at the following test points with thoseillustrated in Figure 9-3.BLANKING: J202 pin 15BLANK: U214 pin 1

u213-13BLANK I NG4.00 V/div 2.50 V 2.0 us/div 96.00 us1 nr IL u//I IISK193Figure 9-4. Expanded Blanking WaveformsDisplay Jumbled or Trace Off ScreenSe

10.0V/div 0 00v 200us/div 0.000 sI NTEGRATESAMPLELCHARVECTORIISK194Figure 9-5. Switch Driver Waveform LCHAR7. All of the DAC inputs should change stat

13.Figure 9-8 illustrates the waveforms of properly working line generators. Whenever thereis a pulse on TPl or TP2, the appropriate integrator (U201B

a00 v/dIv0.00 v10.0 us/div0.000 sU201A-1TP2U203A- 1TPISK197Figure 9-8. Normal X/Y Line Generator WaveformsIntensity1.2.3.4.5.The length of the vector

Long Lines Dimmer Than Short LinesSee function block M of A2 Controller Schematic Diagram (sheet 1 of 4) in theHP 856OA/61B/63A Spectrum Analyzer Comp

9. The waveforms should look like those illustrated in Figure 9-10. If the waveform at J201pin 14 is bad, troubleshoot the Y Line Generator (function

Table 1-4. Recommended Test Equipment (continued)ment SubstitutionType N (m) to SMA (f)Length: 291 cm (36 in.)Cable, 5052 Coaxial Connectors: BNC (m)H

6. In Figure 9-11, there is no synchronization between DEFl and the video patterns X POSand Y POS when DEFl is TTL high. The Y POS level when DEFl is

Frequency CounterSee function block 2 of A2 Controller Schematic Diagram (sheet 4 of 4) in theComponent-Level Information binder.The frequency counter

1. Disconnect W22 from A2J8.2. If a 10 MHz, TTL-level signal is not present at the end of W22 continue with step 3. If a10 MHz signal is present at W2

Keyboard ProblemsIf the analyzer does not respond to keys being pressed or the knob being rotated, the faultcould be either on the A3 Interface assemb

10Synthesizer SectionThe Synthesizer Section includes the A7 First LO Distribution Amplifier, All YTO, and partsof the Al4 Frequency Control and Al5 R

CautionUsing an active probe, such as an HP 85024A, with a spectrum analyzer isrecommended for troubleshooting the RF circuitry. If an HP 1120A Active

2. Set the HP 8560A to the following settings:SPAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10. Set the HP 8560A to the following settings:CENTER FREQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

SYNTHESIZEDSWEEPERADAPTERQ SPECTRUM AN,ALYZERDIGITAL VOLTMETERADAPTER jj‘y.ln1111A14>501A14‘ FREOCONTROLA14J17PIN 1SK1 101Figure 10-l. YTO Loop Tes

2Adjustment ProceduresIntroductionThis chapter contains information on automated and manual adjustment procedures for theHP 8560A spectrum analyzer. P

BNC CABLEFREQUENCY COUNTERS&W&ii; I 2 EDIFREOUENCYSTANDARDEXTSMA CABLETEST CABLEA I5’J1 0 1AdA JlSK1102Figure 10-2. Sampler and Sampling Oscil

Table 10-2. Sampling Oscillator Test FrequenciesHP 8560A HP 8340A Frequency of Offset PLL’sZenter Frequency (MHz) CW Frequency (MHz) Sampling Oscillat

n To display the nominal YTO’s frequency, press (CAL), MORE, FREQ DIAGNOSE, LO FREQ .Table 10-3. YTO Frequency in TEST PositionRoller Oscillator Frequ

Table 10-4. Automatic Fault isolation References (1 of 2)Suspected Circuit Indicatedby Automatic Fault IsolationCheck the YTO LoopCheck 1st LOCheck 1s

Table 10-4. Automatic Fault Isolation References (2 of 2)Suspected Circuit Indicatedby Automatic Fault IsolationCheck Offset Oscillator PLLCheck Offse

Table 10-5. TAM Tests versus Test Connectors (1 of 2)Connector Manual Probe Troubleshooting Test Measured Signal Line,A14J 15 Sweep Generator MS8Span

Table 10-5. TAM Tests versus Test Connectors (2 of 2)Connector Manual Probe Troubleshooting Test Measured Signal LinesA14J303 XFER Amp Bias MS3Main Am

General PLL TroubleshootingThe Synthesizer Section relies heavily on Phase-Lock Loops (PLL). Typically, faulty PLL’sare either locked at the wrong fre

1. The loop integrator’s output voltage (1) should be attempting to tune the oscillator to thecorrect frequency.a. The voltage at (1) should increase

Frequency Span Accuracy ProblemsThe HP 8560A employs lock-and-roll tuning to sweep the 1st LO. The 1st LO is locked to thestart frequency immediately

Safety ConsiderationsAlthough this instrument has been designed in accordance with international safety standards,this manual contains information, ca

3. Use the following equation to determine the first-LO span used.First LO Span =Display’s Span SettingCurrent Band’s Harmonic Mixing Number4. Refer t

YTO FM Coil Span Problems (LO Spans 1.01 MHz to 20 MHz)In YTO FM Coil spans, the YTO loop is locked and then opened while the sweep ramp issummed into

13. The voltage at A14U332 pin 2 should be approximately 19% of the voltage at A14523pin 2.14. If the 1st LO frequency did not change in step 12, set

3. If A14J17 pin 1 does not appear to be correct, verify that the sweep ramp is reaching theMain/FM/VCO SweepSwitch as follows:Change the oscilloscope

4. Set the HP 8560A to the following settings to open U324A and close U418C. This invertsthe waveform at A14J15 pin 13.START FREQ . . . . . . . . . .

First LO Span Problems (All Spans)1. Set the HP 8560A to the following settings:CENTER FREQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17. Set the HP 8560A’s sweep time to 100 ms. The voltage at 518 pin 4 should measureapproximately -4.21 Vdc.18. Set the HP 8560A’s sweep time to 200 m

Unlocked YTO PLLOperationThe All YTO is locked to two other oscillators, the Roller PLL’s Main Oscillator and theOffset PLL’s Sampling Oscillator. For

negative Sampler IF’s, the Main Roller Oscillator must sweep from a higher frequencyto a lower frequency. This is necessary since an increasing YTO fr

Table 10-l 1. Amplifier PolaritiesYTO Error VCO Sweep ERRSGN VCOSGNSign Amplifier Driver(A14U313 pin (A14U425 pinAmplifier12)12)oller’s OffsetOscillat

Adjustment ToolsFor adjustments requiring a nonmetallic tuning tool, use fiber tuning tool, HP part number8170-0033. For adjustments to the IF Bandpas

4. Measure the YTO frequency at the front-panel’s 1ST LO OUTPUT jack and recordbelow:YTO Frequency (measured) = MHz----------

8. If the YTO Frequency Error recorded in step 5 is less than 10 MHz, do the following:a. Measure the frequency at A14J304. The frequency should be e

Table 10-12. YTO Frequency Errors with A14J23 on Pins 2 and 3(I-104to-93MHz-93to-73MHz-73to-65MHz+65 to +73 MHz+73 to +93 MHz+93to $104 MHzYTO Freque

22. Place jumper A14J23 in the NORMAL position and reconnect W34 to A15A2Jl.23. Set the HP 8560A to the following settings:CENTER FREQ . . . . . . . .

33.If the voltage monitored in step 23 is correct with a 0 dBm output but not with -15 dBmoutput, suspect A14U201 or A14U202. If the voltage does not

41. The Main Coil Coarse and Fine DACs correct any initial pretune errors in the YTO maincoil. The DACs adjust the FM-coil current to zero before any

Unlocked Roller Oscillator PLLOperationThe Roller Oscillator is used in the HP 8560A as a reference for the 1st LO phase-lock loop.It provides the 25

3. If the Roller Oscillator measures a stable 94.7 MHz, the Roller Oscillator PLLs areprobably locked.4. If the Roller Oscillator is off-frequency or

NoteIf the Transfer Roller Oscillator is locked, the address decoder is not at fault.Address decoder U302 decodes a single address for both the Offset

21. Set the HP 8560A to the following settings:CENTER FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...30

Assembly Changedor RepairedAlAl KeyboardNo related adjustmentAlA RPGNo related adjustmentA2 ControllerDisplay AdjustmentA3 InterfaceA4 Log Amp/Cal Osc

8. If the pretune voltage is not within the range in step 5, check U119A, U122A, Q102, Q103and the Transfer Oscillator Pretune DAC address decoder, U3

Main Oscillator PLLThe Main Oscillator PLL provides an output signal in the range of 63 MHz to 106 MHz. Thissignal is the reference to the YTO PLL. Th

13. If the Transfer Oscillator drive signal is not present, check the XFER AMP BIAS at J303pin 3. The voltage should measure +2 Vdc to +4 Vdc.14. Chec

Unlocked Offset Lock Loop (Sampling Oscillator)OperationThe Offset Lock Loop drives the A15A2 Sampler. The Offset Lock Loop’s sampling oscillatortunes

Table 10-15. Sampling Oscillator PLL Divide Ratios!klplitlgOscillatorFreq.(MHz)Center Divide TP 406,Freq.* Ratios TP 4071(MHz) (MHz)N ControlLinesM Co

14. Measure the loop-IF signal at the input to the IF Amp./Limiter (function block AK):U401 pin 2 20 MHz (approximately -6 dBm)15. Confirm the presenc

Unlocked Reference PLLOperationThe Reference PLL’s 600 MHz output is generated by a 600 MHz SAWR (Surface AcousticalWave Resonator) VCO. The SAWR prov

15.16.17.18.19.20.21.22.23.Measure the signals at the following test points with an active probe/spectrum analyzercombination such as an HP 85024A/HP

29. If the front-panel CAL OUTPUT amplitude is out of specification and cannot be broughtwithin specification by adjusting A15R561, CAL AMPTD, check t

3. If the signal at A15TP602 is low, but the signal at A15TP504 is correct, press [s),INTERNAL MIXER,and SIG ID OFF.4. Check that PIN diode switches

Assembly Changedor RepairedAl3 2nd ConverterAl4 Frequency ControlAl5 RFAl5Al 2nd IF AmplifielAl5A2 SamplerAl7 CRT Driver418Vl CRTA19 HP-IBA21 OCXOTabl

7. If a correct signal is seen at A15TP201 but the signal at A15TPlOl is wrong, proceed asfollows:. Use an oscilloscope to measure the signals at the

Sweep Generator CircuitThe Sweep Generator operates by feeding a constant current from DAC U307 into anintegrator, U320B. See function block K of Al4

C14.Cl5.Cl6CURRENT SOURCE’ ISWEEPU308, RZO-R24CR6U312B/C/D75oR0R29R65U31 12A526KIKU312DSK1110Figure 10-10. Simplified Sweep Generator during RetraceIO

lROLLERIPLL’S1IIIh---e--tiI------J304ROLLER TESTAPPROX -30 dBm63 TO 105.5 MHzMAIN ROLLER FREO1301SAMPLER IFw34BLACKw32GRAY/VIOLEl---------m;A15 RF ASS

J501 SAMPLERAl5 -15 TO OdBmI-------------------- --------------------a/P/O Al4 FREQUENCY CONTROL 11YTO LOOPIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIYTO LOOPE

W34 1ST LO SAMPJ501 CAL OUTPUTFRoM A7 LoDA iTO FRONT PANEL TO SIG ID OSCILLATOR> -9 dBm 1.v--m---m----$-losm--tf_15dBm_ -----__-I+/0 ~15 RF iITTLLE

A21 OCXO (Option 003 only)Spectrum analyzers with Option 003, Precision Frequency Reference, use an oven-controlledcrystal oscillator (OCXO)instead of

11RF SectionThe RF Section converts the input signal to a 10.7 MHz IF (Intermediate Frequency). SeeFigure 11-5 for a detailed section block diagram.No

Safety SymbolsThe following safety symbols are used throughout this manual. Familiarize yourself with eachof the symbols and its meaning before operat

Table 2-2. Adjustable Components (1 of 3)ReferenceDesignatorA2R206A2R209A2R215A2R218A2R262A2R263A2R268A2R271A4C707A4R445A4R531A4R544A4R826A5L300A5L301

CautionUse of an active probe, such as an HP 85024A, with another spectrumanalyzer is recommended for troubleshooting the RF circuitry. If an HP1120A

Table 11-l. Automatic Fault Isolation ReferencesSuspected Circuit Indicatedby Automatic Fault IsolationCheck 2nd IF AmplifierCheck 2nd IF Distribution

Table 11-2. TAM Tests versus Test ConnectorsConnectorA14J17A14J18A14J19A14J302A15J400A15J502A15J602A15J901Manual Probe Troubleshooting TesMain Coil Co

6. Check Al3 Second Converter mixer diode bias at A14J19 pin 1. The bias voltage should bebetween -150 and -900 mVdc.7. Troubleshoot the signal path.

A7 LODA (LO Distribution Amplifier)NoteYTO unlock errors may occur if the power delivered to the A15A2 Sampler isless than -9.5 dBm. Frequency respons

A9 Input Attenuator1. Perform the Input Attenuator Accuracy test in Chapter 3 of the Installation andVerification Manual.2. If there is a step-to-step

Al3 Second ConverterCautionThe Al3 assembly is extremely sensitive to Electrostatic Discharge (ESD). Forfurther information regarding electrostatic ca

Al4 Frequency Control AssemblyNoteThe block diagrams for the Al4 and Al5 assemblies are located in Chapter 10,Synthesizer Section.A7 LODA DriveSee fun

--m--m--m--------Allr;;7 1ST LO DISTRIBUTION ,1YTO J4 ’F 1 JZ 1 SAMPLER 1ST MIXER OUT OUT -913 TOTO -216 dh dBMJ3 II1ST LO OUT 14.5 TO 18.5 dBmtI-----

7. If a flat line is displayed within 2 dB of the reference level and the performance test passed,troubleshoot microcircuits A7, A8, A9, and A13.8. If

Table 2-2. Adjustable Components (2 of 3)ReferenceDesignatolA5T500A5T502A6R410AlORAlORAlOC3A14R42A14R76A14R93A14R621414R628415ClOOA15C210A15C629A15R23

3. Connect a signal source to A15J801 and set the source to the following settings:Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flatness Compensation ControlSee Function Block G of Al5 RF Schematic Diagram (Sheet 2 of 4) in the component- levelinformation binder.The Flatness Co

1. Set the HP 8560A to the following settings:TRIGGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4.5.6.7.8.9.10.Check for a 3 Vp-p waveform at A15J302 using an oscilloscope (see Figure 11-3).Check that the signal at A15J301 is 10 MHz 640 Hz (wit

Graph C 1 11 00 V/div1.00 v50.0 ns/div0.000 s1:[Ghan 1 1A15J302Figure 11-4. 10 MHz TTL Reference at U303 Pin 5II-16 RF Section

Table 11-4 lists the RF Section mnemonics shown in Figure 11-5 and provides a briefdescription of each.Table 11-4. RF Section Mnemonic TableMnemonic D

A10 Tracking Generator (Option 002)Block Diagram DescriptionThe A10 Tracking Generator consists of several smaller circuits. The A10 is notcomponent-l

Output AmplifierThe output amplifier low-pass filters the signal emerging from the Output Mixer and thenamplifies it into a usable range. The amplifie

3. Check maximum power available from the TG. Connect the RF OUT 50R to the INPUT50R. Press (??%??I, IAMPLITUDE), 0, @, (z), LOG dB/DIV ,a, (dB), (mj,

Flatness Out-of-ToleranceThe output level flatness of the tracking generator is specified at a 0 dBm output powersetting. In general, most flatness pr

Table 2-2. Adjustable Components (3 of 3)ReferenceAdjustment Adjustment DescriptionDesignatorNameNumberA15R561 CAL AMPTD11Adjusts amplitude of the 300

3. Check for excessive LO feedthrough. Use the LO Feedthrough performance test in theInstallation and Verification Manual, but check over a Center Fre

Power Sweep Not Functioning ProperlyPower sweep is accomplished by stepping Real Time Dac #l (R/T DACl) which adds anoffset to the POWER LVL signal. R

7. If all of the checks above are correct, the tracking oscillator might not be functioning.Setup the HP 8560A as indicated in the Tracking Oscillator

12Display/Power Supply SectionThe Display/Power Supply Section contains the A6 Power Supply, A6Al HV Module, Al7CRT Driver, and Al8 CRT. Figure 12-1 i

JWARNING(WHENTROUBLESHOOTINGTHE POWER SUPPLYUSE ANISOLATIONTRANSFORMERAND CONNECTAGTPlOi TO A6TP301FRONT PANEL LED+5v 7LINE^,.,, _rFL4>WI ILHI~ FAN

Table 12-1. Wl Power-Cable Connections (1 of 2)SignalNCNCA GNDNCNCA GNDNCNCA GNDSCAN RAMFNCA GND-12.6 V-15VA GND-15 Vf15 VA GND+15 Vf28 V+28 VPWR UP-1

Table 12-1. Wl Power-Cable Connections (2 of 2)Signal$5 V$5 v$5 V+5 V+5 V+5 V+28 VLINE TRIGGER+15 V+15 V-15 V-15 VA2Jl:pins)1211109876A3Jl:pins)394041

Al7CRT DRIVERBlank DisplayID&E”lSlONCONNECTOR)SK1121Figure 12-2. Al7 Test ConnectorTable 12-3. TAM Tests versus Test ConnectorsManual Probe Troubl

9. Move the probe cable to A2J201, press SOFT KEY #l and wait five seconds.16. Press SOFT KEY #4 . The results will be sent to the printer.11. If a f

Using the TAMThe HP 85629B TAM can be used to perform approximately half of the HP 8560Aadjustment procedures. Table 2-4 lists the TAM adjustments and

r--------_-------_IIIFRONT VIEWI, +15vIISK1122Figure 12-3. Probe Power Socket5. If all of the power supply indicators along the outside edge of,the A2

3. Perform the Display Adjustment in Chapter 2. Isolate the problem to either the X or Yaxis by noting the behavior of the adjustments. If the line ge

6. Turn off the analyzer and place Al7 in the service position. Connect the ground lead ofa high-voltage probe (HP 34111A) to the chassis, and use it

6. If blanking pulses are present, check A17TPlO with the oscilloscope. The TPlO signalshould vary with the front-panel INTEN adjustment, and be appro

A6 Power Supply AssemblyThe HP 8560A uses a switching power supply operating at 40 kHz to supply the low voltagesfor most of the analyzer hardware and

11. If there are pulses at TP206, or there are pulses at TP210, but not at TP206, the BuckRegulator Control circuitry is probably faulty.12. Disconnec

Line Fuse Blowing1. If the line fuse blows with the (LINE) switch off, suspect either the Input Filter or the powerswitch cable assembly.2. If the lin

9. If the voltages do not return to near their nominal range, the A6 Power Supply isprobably at fault.10. If the +5 V supply is low, suspect the feedb

CRT Supply Dropping OutSee function block K of A6 Power Supply Schematic Diagram in the Component-LevelInformation binder.The CRT Supply is a separate

Buck Regulator ControlSee function block H of A6 Power Supply Schematic Diagram in the Component-LevelInformation binder.The Buck Regulator Control pu

Table 2-4. TAM AdjustmentsTAM AdjustmentCorresponding Manual AdjustmentAdjustmentNumber1. IF Bandpass, LC PolesIF Bandpass Adjustment32. IF Bandpass,

Power UpSee function block M of A6 Power Supply Schematic Diagram in the Component-LevelInformation binder.The Power Up circuitry generates the PWR UP

12-18 Display/Power Supply Section

Component-Level Information PacketsComponent-Level information is available for selected instrument assemblies. The informationfor each repairable ass

Table A-l. HP 8560A Spectrum Analyzer Documented AssembliesBoard Assembly Instrument Assembly CLIP Part Number*Serial Prefix Part Number41Al Keyboard

Table A-l.HP 8580A Spectrum Analyzer Documented Assemblies (continued)Board Assembly Instrument Assembly CLIP Part Number’Serial Prefix Part NumberAl4

Table A-2.A4 and A18 Assemblies Shipped with HP 8560AsSerial Prefixed below 3207ABoard AssemblyInstrument AssemblyCLIP Part NumberSerial PrefixPart Nu

Table A-3.Al5 RF Assemblies Shipped with HP 8560AsSerial Prefixed below 3029ARF Board Option Instrument Assembly CLIP Part NumberSerial Prefix Part Nu

A-6Component-Level Information Packets

Table 2-5. Required Test Equipment for TAM (continued)AdjustmentEquipment Used RequiredRecommendedModelModel6. Log FidelitySynthesizer/Level Generator

1. High-Voltage Power Supply AdjustmentAssembly AdjustedA6 Power SupplyRelated Performance TestThere is no related performance test for this adjustmen

1. High-Voltage Power Supply AdjustmentEquipmentDigital Multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. Display AdjustmentAssembly AdjustedA2 ControllerAl7 CRT DriverRelated Performance TestSweep Time Accuracy (Sweep Times <30 ms)DescriptionCoarse

2. Display AdjustmentProcedure1. Set the analyzer’s @ switch off. Remove the analyzer’s cover and fold out the A2Controller and A3 Interface assemblie

HP 8560A Spectrum Analyzer Documentation OutlineFor ordering information, contact a Hewlett-Packard Sales and Service Office.Manuals Shipped with Your

2. Display Adjustment14. Adjust the rear-panel Y POSN and A17R75 Y GAIN until the softkey labels align withtheir appropriate softkeys.15. Press [m).

2. Display AdjustmentIntensity Adjustments16. Press (-1 then set the REF LVL to -70 dB and the LOG dB/DIV to 1. Thisshould almost completely fill the

2. Display AdjustmentAZR215A2R263AZR262A2R268DGTLY GAIN START BLANK STOP BLANKVIDEO GAINAZR206/DGTLY GAINSK14Figure 2-4. A2 Display Adjustment Locatio

2. Display AdjustmentFast Zero Span Adjustments22. Set A2R209 SWEEP OFFSET, A2R218 VIDEO OFFSET, A2R268 VIDEO GAIN andA2R271 SWEEP GAIN to midrange. A

3. IF Bandpass AdjustmentAssembly AdjustedA5 IF AssemblyRelated Performance TestResolution Bandwidth Accuracy and SelectivityDescriptionThe center fre

3. IF Bandpass AdjustmentProcedure1. Set the HP 8560A m switch off and disconnect the power cord. Remove the analyzercover and fold down the A2 Contro

3. IF Bandpass AdjustmentTable 2-6. Factory-Selected LC Filter Capacitors1CC CTR Adjustment Fixed Factory Select CapacitorA5L300 LC CTR 1A5C326A5L301

3. IF Bandpass AdjustmentNoteIf the range for the XTAL CTR adjustment is insufficient, replace theappropriate factory-selected capacitor as listed in

3. IF Bandpass AdjustmentTable 2-10. Capacitor Part NumbersCapacitor Value (pF) HP Part Number6.80160-47938.20160-4792100160-4791120160-4790150160-478

4. IF Amplitude Adjustments4. IF Amplitude AdjustmentsThe IF Amplitude Adjustments consist of the Cal Oscillator Amplitude adjustment and theReference

Contents1. General InformationManual Organization...Manual Text Conventions...Serial Numbers Covered by This

4. IF Amplitude AdjustmentsA5 IFA4 LOG AMPR445J4’ /JllJIO(REVISIONCONNECTOR)J9J7R826J238J5JlJ4R544J3R531'SK190Figure 2-7. IF Amplitude Adjustment

4. IF Amplitude AdjustmentsProcedure1. Set the HP 8560A m switch to off. Remove the analyzer cover and place the analyzerin the service position as il

4. IF Amplitude AdjustmentsA5 Reference Attenuator Adjustment12. Set the HP 3335A (AMPLITUDE) to -60 dBm.13. Connect a BNC cable between the 50 R outp

5. DC Log Amplifier Adjustments5. DC Log Amplifier AdjustmentsThere are three DC Log adjustments; Limiter Phase, Linear Fidelity, and Log Fidelity.The

5. DC Log Amplifier AdjustmentsProcedure1. Set the HP 8560A m switch to off. Remove the analyzer cover and place the analyzer inthe service position a

5. DC Log Amplifier Adjustments7. Reduce the input power by 40 dB, to -58 dBm (use an attenuator or a source with agood relative amplitude accuracy).8

5. DC Log Amplifier AdjustmentsA4 LOG Fidelity AdjustmentThis adjustment consists of adjusting A4R531 until the error is adjusted to zero.Procedure1.

6. Sampling Oscillator Adjustment6. Sampling Oscillator AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestThere is no related performa

6. Sampling Oscillator AdjustmentProcedure1. Set the HP 8560A m switch to off and disconnect the line power cord. Remove theanalyzer cover and fold do

6. Sampling Oscillator Adjustment12. Record the displayed voltage in Table 2-11 as the displayed voltage for the samplingoscillator frequency of 288 M

15. External Mixer Amplitude Adjustment...2-5716. Second IF Gain Adjustment...2-6017. Signal ID Oscillator Adjustment...

6. Sampling Oscillator Adjustment23. Set the HP 6114A Power Supply for a 21 Vdc output 50.2 V. Connect the positive supplylead to X201 pin 1 and the n

7. YTO Adjustment7. YTO AdjustmentAssembly AdjustedAl4 Frequency Control AssemblyRelated Performance TestsFrequency Span AccuracyFrequency Readout Acc

7. YTO AdjustmentProcedureNoteThis adjustment cannot be performed if the analyzer preselected externalmixer mode is selected.1.2.3.4.5.6.7.8.9.10.11.1

7. YTO AdjustmentYTO FM Coil Adjustments13. On the HP 856OA, press (PRESET) and set the controls as follows:CENTER FREQ. . . :. . . . . . . . . . . .

8. First LO Distribution Amplifier AdjustmentAssembly AdjustedAl4 Frequency Control AssemblyRelated Performance TestFirst LO OUTPUT AmplitudeDescripti

8. First LO Distribution Amplifier Adjustment4. Set the HP 3456A controls as follows:FUNCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9. Tracking Generator Power Level AdjustmentsAssembly AdjustedA10 Tracking Generator AssemblyRelated Performance TestAbsolute Amplitude and Vernier Ac

9. Tracking Generator Power Level Adjustments2.Connect the Type N cable between the RF OUT 500 and RF INPUT 50R connectors onthe HP 8560A.3.Press (PRE

9. Tracking Generator Power Level Adjustments10. Set the TRK GEN RF POWER to -10 dBm. Note the power displayed on the measuringreceiver.Power at -10 d

10. Frequency Response Adjustment10. Frequency Response AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestsDisplayed Average Noise Lev

6. General TroubleshootingIntroduction ...Assembly Level Text...Block Diagrams...

10. Frequency Response AdjustmentEquipmentSynthesized Sweeper... HP 8340A/BMeasuring Receiver...

10. Frequency Response Adjustment13. Place the WR PROT/WR ENA jumper on the A2 Controller assembly in the WR PROTposition.Adjustment Procedures 2-47

11. Calibrator Amplitude AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestCalibrator Amplitude and Frequency AccuracyDescriptionThe C

11. Calibrator Amplitude Adjustment3. Connect the HP 8482A through an adapter directly to the HP 8560A CAL OUTPUTconnector.4. Adjust A15R561 CAL AMPTD

12. 10 MHz Reference Adjustment (Non-Option 003 only)Assembly AdjustedAl5 RF AssemblyRelated Performance Test10 MHz Reference Output AccuracyDescripti

12. 10 MHz Reference Adjustment (Non-Option 003 only)3. Press CjCTRL), REAR PANEL , and ensure that the 10 MHz reference is set to10 MHz INT.NoteWhen

13. Demodulator AdjustmentAssembly AdjustedA4 Log Amplifier AssemblyRelated Performance TestThere is no related performance test for this adjustment p

13. Demodulator AdjustmentCablesBNC,122cm(48in). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A1:l Os

13. Demodulator AdjustmentNoteIt is possible to do this procedure without an oscilloscope by adjustingA4C707 FM DEMOD for the loudest audio tone from

14. External Mixer Bias Adjustment14. External Mixer Bias AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestThere is no related perfor

Option Module Errors (800 to 899)...6-34User-Generated Errors (902 to 904)...6-34Block Diagram Description...

14. External Mixer Bias Adjustment3. On the HP 8560A press [m) EXTERNAL MIXER BIAS, then BIAS OFF.4. Adjust A15R926 EXT BIAS ZERO for a DVM reading of

15. External Mixer Amplitude Adjustment15. External Mixer Amplitude AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestIF Input Amplitu

15. External Mixer Amplitude AdjustmentAdaptersType N (f) to SMA (f)...1250-1772Type N (m) to BNC (f)...

16. Second IF Gain AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestIF Input Amplitude AccuracyDescriptionThe gain of the Second IF (

16. Second IF Gain Adjustmentccc/1:A15Al(BENEATH 5~ I ELD)SK118Figure 2-19. Location of AlSAlAdjustment Procedures 2-61

16. Second IF Gain AdjustmentTable 2-13. A15U802 ValuesSecond IF AmplifierU802 ValueGain Range (dB)(dB)13.1to14.2114.3to15.2215.3to16.2316.3to17.2417

17. Signal ID Oscillator Adjustment17. Signal ID Oscillator AdjustmentAssembly AdjustedAl5 RF AssemblyRelated Performance TestThere is no related perf

17. Signal ID Oscillator AdjustmentCablesBNC, 122 cm (48 in) (2 required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 1050

17. Signal ID Oscillator Adjustment9. While observing the HP 8566A/B display, adjust A15C629 SIG ID for the highestobtainable frequency with less than