HewlettPackard_608E维修电路原理图.pdf

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1、 . . 60BE/F VHFSIGNAlGENERATOR HPPARTNUMBER00608-90046 rliHEWLETT PACKARD l RadioFans.CN 收音机爱 好者资料库 , ,-OPERATINGANDSERVICEMANUAL-, 608E/F VHFSIGNAlGENERATOR HPPARTNUMBER00608-90046 SERIALS PREFIXED: ThisOperatingandServicemanualapplies toHP 608E/Finstrumentswithserialnumbersprefixed 833-above02720(

2、GOBE)and832- above 01500 (608F). SERIALPREFIXESNOTLIST!l: Forinstrumentswithlowerserialnumberprefixes aBackdatingAppendixissuppliedintheback ofthismanual. Flio-HEWLETT r.IPACKARD CopyrightHEWLETT-PACKARD COMPANY 1965 1501PAGEMILLROAD, PALO ALTO, CALIFORNIA, U.S.A. OPERATING AND SERVICE MANUAL PARTNO

3、.0060890046 Operating end Service Menual MIcrofiche Part No. 00608-90047Printed: APRIL1981 RadioFans.CN 收音机爱 好者资料库 Model608E/F TableofContents TABLEOFCONTENTS SectionPageSection Page IVPRINCIPLESOFOPERATION. VMAINTENANCE. 5-1.Introduction. 5-3.PeriodicInspection. 5-4.Cleaning. 5-6.Lubrication. 5-9.P

4、erformanceTests. IIINSTALLATION. 2-1.IncomingInspection. 2-3.PreparationForUse. 2-4.PowerRequirements. 2-6.PowerCable. 2-8.RepackingForShipment. IGENERALINFORMATION. 1-1.Description. 1-3.Frequency. 1-5.Modulation. 1-7.RFI. 1-9.AuxiliaryEquipment. 1-10.Model11509AFuseholder. 1-12.Model11508ATerminate

5、d OutputCable. 1-14.InstrumentIdentification. 5-15 5-15 5-29 5-30 5-32 5-32 5-14 5-26 5-26 5-16 5-12 5-12 5-13 5-13 5-18 5-11 5-17 5-17 5-18 5-12 5-10 5-10 5-23 5-23 5-23 5-25 5-25 5-16 5-1 5-8 5-9 5-9 5-8 5-8 5-8 5-1 5-5 5-5 5-5 5-7 5-7 Purpose. FrequencyAccuracyand ResettabilityTest. CalibratorAcc

6、uracyTest. FrequencyDriftTest. ResidualFMTest. IncidentalFMTest. MaximumRFOutputTest. FrequencyResponseand LevelingTest. RFOutputAccuracyTest. UncalibratedRFOutputTest. ExternalSine-WaveModulation andModulationMeterTest. InternalModulationTest. EnvelopeDistortionTest. ExternalPulseModulationand ReSi

7、dualLevelTest. RFLeakageTest. FrequencyControlInputTest (Model608FOnly). FrequencyAnalogOutputTest (Model608FOnly). SynchronizationTestwith Model 8708ASynchronizer (Model 608F). Adjustment. PowerSupplyVoltageAdjustments ModulationMeterAdjustment. CalibrationofPercent ModulationMeter. AutomaticOutput

8、Leveling Adjustment. RFOscillatorAdjustment. UncalibratedRFOutput,Minimum RFOutput, andRFAmplifier TrackingAdjustment. RFOutputMeterAccuracy Adjustment. RFOutputMeter/AUenuator FrequencyResponseandAuto- matic-LevelingOutput Adjustment. CrystalCalibratorAdjustment. Troubleshooting. IsolatingaTroublet

9、oa CircuitSection. IsolatingTroubleinTransistor Circuits. ReplacementandRepair. EtchedCircuitBoardRepair. ComponentReplacement. EtchedConductorRepair. TransistorandSemiconductor DiodeReplacement. ReplacementofElectron Tubes. AttenuatorProbeRepair andReplacement. Replacementin Housing. ReplacementofL

10、ampDSI. LocationofParts. 5-47. 5-48. 5-50. 5-59. 5-62. 5-63. 5-64. 5-66. 5-46. 5-67. 5-54. 5-74. 5-82. 5-83. 5-85. 5-42. 5-43. 5-25. 5-26. 5-29. 5-31. 5-34. 5-37. 5-10. 5-12. 5-13. 5-14. 5-15. 5-16. 5-17. 5-18. 5-19. 5-20. 5-21. 5-41. 5-27. 5-28. 5-22. 5-23. 5-24. 4-4 4-5 4-7 4-7 4-7 4-8 5-1 5-1 5-1

11、 5-1 5-1 5-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-4 3-4 3-5 3-5 4-1 4-3 2-1 2-1 2-1 2-1 2-1 2-1 4-1 4-1 4-1 4-1 4-1 4-2 4-3 4-3 4-3 4-3 1-1 1-1 1-1 1-1 1-1 1-1 1-1 1-1 1-1 Introduction. GeneralDescription. RFGeneratorSection, Mode1608E. RFGeneratorSection, Model608F. AmplitudeModulationSection. AttenuatorS

12、ection. CalibratorSection. ModulationMeterSection. PowerSupplySection. DetailedDescription. RFGeneratorSection, Model608E. RFGeneratorSection, Model608F. AmplitudeModulationSection AttenuatorSection. CalibrationSection. ModulationMeterSection. PowerSupplySection. 4-33. 4-9. 4-15. 4-17. 4-19. 4-21. 4

13、-23. 4-25. 4-37. 4-51. 4-55. 4-59. 4-63. 4-1. 4-3. 4-5. 4-7. IIIOPERATION. 3-1.Introduction. 3-3.Controls,IndicatorsandConnectors 3-5.Pre-OperationalProcedures. 3-7.RFOutputLoading. 3-9.Turn-OnProcedures. 3-11.CalibrationProcedures. 3-16.ModeOperatingProcedures. 3-18.InternalModulation. . . 3-20.Ext

14、ernalModulation. 3-22.Phase-LockOperationProcedures (Model608FOnly). iii RadioFans.CN 收音机爱 好者资料库 TableofContents Listoflllustrations TABLEOFCONTENTS(Cont.) Model608E/F SectionPageSectionPage VIREPLACEABLEPARTS.6-1 6-1.Introduction.6-1 6.3.ReplaceablePartsList. . 6-1 6-6.OrderingInformation. 6-1 6-9.

15、FactorySelectedParts(*). .6-1 vnSCHEMATIC DIAGRAMS COMPONENT LQCATION INFORMATION7-1 7-1.Introduction.7-1 APPENDIX1. . . . . . . . . . . . . . . . . . . .11 APPENDIXIT. . . . . . .IT-I LISTOFILLUSTRATIONS NumberNumber 1-1. 3-3. 3-4. 4-1. 5-1. 5-2, 5-3. 5-4. 5-5. 5-6. 5-7. 5-8. 59. 5-10. 5-11. 5-12.

16、5-13. 5-14. 5-15. 5-16. 5-17. Iv Title Model608Eand608FVHFSignal Generators. FrontPanelControls,Indicators, andCormectors. Controls,IndicatorsandConnectors UsedinOperationwithInternally GeneratedSignals. Controls,IndicatorsandConnectors UsedInOperationwithExternally SuppliedSignals. Controls.Indicat

17、ors,.:.!:.1:=3 UsedinPhase-LockOperation (Model608FOnly). OverallBlockDiagram,Models 608Eand608F. FabricatedTestEqUipment. LubricationPOints,RF1merDrive Mechanism. FrequencyAccuracyandResettability TestSetup. ResidualandinCidentalFMTestSetup. RFOutpJ.tTestSetup. UncalibratedRFOutputTestSetup. Extern

18、alSine-WaveModulationand ModulationMeterTestSetup. EnvelopeDistortionTestSetup. PulseModulationTestSetup. RFLeakageTestSetup. FrequencyControlInputTestSetup. SynchronizationTestSetup. LocationPowerSupplyand ModulationMeterAdjustments. ModulationMeterCalibrationTest Setup. Patternon140Oscilloscopeat5

19、0% modulation. LocationofLevelingandRFOutput MeterAdjustment. LocationofRFOscillatorAdjustment Page 1-0 3-2 3-6 3-8 3-10 4-0 5-3 5-4 5-5 5-6 5-7 5-8 5- 5-10 5-10 5-11 5-11 5-12 5-13 5-14 5-14 5-15 5-16 5-18. 5-19. 520. 5-21. 5_22. 523. 5-24. 5-25. 5-26. 5_27. 5-28. 5_29. 5-30. 5_31. 5-32. 533. 7-1.

20、7-2. 7-3. 7-4. 7-5. TtUe Frequency-ResponseAdjustments. LocationofFrequency-Responseand Crystal-CalibratorAdjustments. VoltageandResistanceMeasure INT 1000 -Operation. ALCBoardVoltageandResistance Measurements,CWandPULSE SETRFOUTPUTOperation. TransistorBiasingandOperating Characteristics. Locationof

21、ElectronTubes. ReplacementofOscillatorand AmplifierTubes. DisassemblyofAttenuatorDrive Cable.,. AttenuatorProbe,ShOWingPickup LoopandImpedanceMatchingNetwork RFGeneratorAssemblyLocationof UnlabeledParts(SideCoverRemoved) Model608ERFGeneratorAssembly ShoWingLocationofUnlabeledParts (TopCoverRemoved).

22、 Model608FRFGeneratorAssembly ShOWingLocationofUnlabeledParts (TopCoverRemoved). RightSideView ShowingLocationof UnlabeledChassisComponents. LeftSideView ShowingLocationof UnlabeledComponents. RearView ShowingLocationof UnlabeledChassisComponents. CircuitBoardPartsIdentification. SchematicWormationl

23、llustration_ SchematicDiagramNotes. ComponentIdentification,Modulator andALCBoard. RFGeneratorandModulator SchematicDiagram. ModulationMeter,CrystalCalibration, andPowerSupplySchematicDiagram. Page 5-18 5-18 5-19 5-22 5-24 5-28 5_29 5-30 5-31 5-32 5-33 5-34 5-35 5-36 5-37 5-38 7-1 7-2 7-3 7-3 7-5 )

24、, ) RadioFans.CN 收音机爱 好者资料库 Model 608EIF Number I-I. 5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7. 6-1. 6-2. 6-3. 6-4. LISTOFTABLES Title Specifications. TestEquipment Required for Maintenance. Lubrication Chart. Out-of-CircuitTransistorResistance Measurement. Safe Ohmmeter Ranges forTransistor ResistanceMeasu

25、rement. EtchedCircuitSoldering Equipment. Checks Following Tube and Semiconductor Replacement. 608E/FTroubleshooting Procedure. Reference Designations. Abbreviations. ReplaceableParts. CodeListof Manufacturers. Page 1-2 5-2 5-4 5-25 5-25 5-26 5-27 5-40 6-2 6-2 6-4 6-12 List ofTables v RadioFans.CN 收

26、音机爱 好者资料库 - -c:JP Section I oG eA - -f!l- o-o Model608EIF e - - . I Model608E e .1iJ1iia. V Model608F ) ./ 1-0 Figure1-1.Model 60SEand608FVHFSignal Generators RadioFans.CN 收音机爱 好者资料库 Model608E/F SECTIONI GENERALINFORMATION SedionI , 11.DESCRIPTION. 1-2.TheHewlett-PackardModel608Eand608F SignalGenera

27、tors(seeFigure1-1)aredesignedto meettherequirementsofprecisionlaboratorywork, andyettobeequallyusefulforgeneralapplicationsin theVHFfrequencyrange.TheModel 608Efurnishes RFsignalsfromO.1microvoltto1 voltfrom10MHz to480 MHz,whiletheModel608FsuppliesRFsignals fromO.1microvolttoO.5voltinafrequencyrange

28、 from10MHzto455MHz.TheRFcarriercanbe amplitudemodulated byinternallygeneratedsine- wavesignals,orbyexternallysuppliedsine-waveor pulsesignals.TheMooel 608Fcontainsfrequency controlcircuitrywhichpermitstheinstrumenttobe usedinphase-lockoperationwiththeModel 8708A Synchronizer.Thisprovisionprovidesast

29、abilized outputacrossmostoftherangeoftheinstrument, withadriftfactorof2 x10-1per10minutes.The instrumentscanbeusedfortroubleshooting,testing, calibrating,measuringstanding-waveratios,and checking antenna andtransmissionlinecharacteris- tics.Topreserveaccuracy,equipmentdesignholds spuriousmodulationt

30、o a low valueunderalloperating conditions.Detailedspecificationsfor bothinstru- mentsarelistedinTable1-1. 1-3.FREQUENCY. 1-4.Thefrequency ofthec.1tpu!signalisindicatedon adirectreadingdial,thecalibrationofwhichisaccurate tobetterthanO.5%forthe608Eandl%forthe608F, whenthecursorandFINEFREQareproperlya

31、ligned. Calibrationaccuracymaybeimprovedfurtherbyuseof a built-in crystal-controlledheterodynecalibratorwhich furnishes1MHzcheckpointsfrom 10MHzto270MHz,or 5MHzcheckpointsovertheentirefrequencyrangeofthe instrument.Atanycheckpointthecalibrationcanbeset veryelO8etothecalibratoraccuracyof0.01%,bringin

32、g overallaccuracytoatleastO.O5%.Flequency check pointsignal.eareobtainedwhenaheadphoneset(not fumi.ehed)ispluggedintotheXTALCAL OUTPUT jack. Thecontrolfortheoutputattenuatoriscalibratedinboth decibelsandvolts. Whentheinstrumentisconnectedtoa 5Q.ohm resistiveloadandpowerintotheoutputattenua torisexac

33、tlyattheATIENUATOR CALIBRATEDmark (+7 dB)ontheRF OUTPUT meter,thelevelofpoweror voltageappliedtotheRFOUTPUTconnectormayberead directlyontheA1TENUATORdialwithanaccuracyof 1 dB. Whenconnectedtoa 5O-ohmresistiveload,the VSWRattheRF OUTPUTconnectorwillnolbegreater than1.2(SWRof1.6dB).Thesignalgenerators

34、feature automaticoutputleveling,maintainingtheRFoutput within1dBoftheadjustedoutput. 1-5.MODULATION. 1-6.TheRFoutputsignalcanbeamplitudemodulated byinternallygenerated400orlOOO-cydesinewaves, externallyappliedsinewavesabove1.0 voltrmsover thefrequencyrangefrom20Hz lo 20 kHz,orexter- nallyappliedpuls

35、esof10voltspeak-lo-peak.When pulsemodulated,thesignalgeneratorsarecapableof producingpulsesofRFenergyasshortas4micro- secondsatSignalfrequenciesabove40MHz,andpulses asshortas2microsecondabove 220MHz.Thedegree ofsine-wavemodulationiscontinuouslyvariablefrom oto90%by afront-panelcontrol.Allsine-wavemo

36、du- lationoftheoutputsignaliscontinuouslymonitored andindicatedinpercentageon adirectreadingmodu- lationmeter. 1-7.RFI. 1-8.RFleakageisheld to aminimumandissuch thatwhentheoutputsignalisadjustedforO.1micro- volt,theconductedsignalleakageatanyotherfront panelconnectorandtheradiatedleakagetwoinches fr

37、omtheinstrumentareeachlessthan1.0microvolt. 19.AUXILIARYEQUIPMENT. 1-10.MODEL 11509A FUSEHOLDER. 1-11.Toprotecttheoutputattenuatorfromdamage, forsomeapplications(suchastransceivertesting)it isdesirabletoinserta fuse betweenthesignalgen- eratorsandexternalequipment.The 11509Aisa specialcoaxialfusehol

38、derwhichhousesa type 8AG, 1/16ampfuse whichprotectsthe outputattenuator fromdamageintheeventthatanexternalvoltageis accidentlyappliedtotheRFOUTPUTconnector.The fuseholderhasaninsertionlossofO.50dBat200MHz, O.56dBat300MHz,and0.65dBat400MHz;tis SWRisnotgreaterthan1.35 when connectedtoa 50- ohmresistiv

39、eload. 1-12.MODEL 1150BA TERMINATED OUTPUT CABLE. 1-13.Thiscableassemblyprovidesa SO-ohmter- minationandstandardbindingpostsattheendofa24- inch length ofcable.The 11508A allowsdirectcon- nectionoftheinstrumentsto ahigh-impedancecircuit. 114.INSTRUMENTIDENTIFICATION. 1-15.Hewlett-Packard1nstrumentsca

40、rryatwo-sec- tion,eight-digitserialnumber.Thefirstthreedigits areaprefix.Thecontentsofthismanual applyto thoseinstrumentshavingtheserialnumberprefix shown onthetitlepage.Iftheserialprefixonyour instrument1s not mentioned onthetitlepage, inthe Appendixtothismanual,orina Manual Change Sheet enclosedwi

41、ththemanual,thecorredinformationmay beobtainedfromanyHewlett-PackardSalesandSer- viceOffice(seerearof manual foraddresses). 1-1 RadioFans.CN 收音机爱 好者资料库 SectionI Model608E/F Table1-1.Specifications FREQUENCY CHARACTERISTICS 608E Accuracy:Within1dB ofattenuatordialreading atanyfrequencywhenRFoutputmet

42、erindicates ATTENUATORCALIBRATED. input.Avoltagechangefrom-2voltsto-32volts willchange theoutputfrequencymorethan0.2% atthelowendofeachbandandmorethan1%at thehighendofeachband.Nominal4Kninput impedance,directcoupled.Voltagelimits: OV.:appliedvoltage.:-50V. OUTPUTCHARACTERISTICS 608E608F OutputLevel:

43、Continu- ouslyadjustablefrom 0.1trVtoO.5Vintoa 50nload.Outputat- tenuatorcalibratedin VanddBm(0dBm= 1 mWin50n). OutputLevel;Continu- ouslyadjustablefrom 0.1/lVtoIVintoa 50nload.Outputat- tenuatorcalibratedin VanddBm(0 dBm= 1mW in SOn). 608F Range:10to 455 MHz in fivebands(10-21,21- 44,44-95,95-210,a

44、nd 210-455MHz).10- 430 MHz whenused with 8708ASynchro- nizer. Accuracy:1%withcur- soradjustment. Drift:Lessthan50parts in 106per10min.pe- riodafterIhr.warm- up.Stabilityusedwith 8708ASynchronizer. 5x10-a/min. 2x10-7/min. Range:10to480 MHzin fivebands(10-21,21- 43,43-95,95-215,and 215-480 MHz). Accur

45、acy:O.5%withcur- soradjustment. Drift:Lessthan50parts in106per10min. periodafter1hr. warmup. (0-55C) -7% 2x10/10line voltagechange. TuningControl:Frequencycontrolmechanism providesaIna i ndialcalibratedinMHzanda vernierdialforinterpolationpurposes.Total scalelengthapproximately45inches.Calibra- tion

46、:everyotherMHzfrom13Uto27UMHz; every5 MHzabove270 MHz. Leveling:InternalfeedbackcircuitretainsAT- TENUATOR CALIBRATEDreferenceonRF outputmeteroverwidefrequencyranges(typi- callyoctavebands).Adjustmentoffrontpanel AMP.TRIMMERcontrol(only)formaximum RFoutputindicationautomaticallyrestoresini- tialcarr

47、.ierlevelforgreaterfrequencychanges. Impedance:50n;reflectioncoefficient0.091 (1. 2 SWR,20.8dBreturnloss)forattenuator settingbelow-7dBm. ) Resettability:Mainfrequencycontrolresettability betterthanG.1%afterinitialwarmup.FINE FREQUENCY ADJUST prOVidesapproximately 25 kHzsettabilityat480 MHz(proportionately fineradjustmentatlowerfrequencies). RFI:MeetsallconditionsspecifiedinMlL-I- 618m;permItsreceiversensitiVitymeasure- mentsdowntoatleast0.1/lV. AuxiliaryRFOutput: CrystalCalibrator:Providesfrequencycheck pointsevery1 MHzupto270 M