HewlettPackard_608E维修电路原理图.pdf

. . 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(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.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.PerformanceTests. 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.Model11508ATerminated 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. CalibratorAccuracyTest. FrequencyDriftTest. ResidualFMTest. IncidentalFMTest. MaximumRFOutputTest. FrequencyResponseand LevelingTest. RFOutputAccuracyTest. UncalibratedRFOutputTest. ExternalSine-WaveModulation andModulationMeterTest. InternalModulationTest. EnvelopeDistortionTest. ExternalPulseModulationand ReSidualLevelTest. RFLeakageTest. FrequencyControlInputTest (Model608FOnly). FrequencyAnalogOutputTest (Model608FOnly). SynchronizationTestwith Model 8708ASynchronizer (Model 608F). Adjustment. PowerSupplyVoltageAdjustments ModulationMeterAdjustment. CalibrationofPercent ModulationMeter. AutomaticOutputLeveling Adjustment. RFOscillatorAdjustment. UncalibratedRFOutput,Minimum RFOutput, andRFAmplifier TrackingAdjustment. RFOutputMeterAccuracy Adjustment. RFOutputMeter/AUenuator FrequencyResponseandAuto- matic-LevelingOutput Adjustment. CrystalCalibratorAdjustment. Troubleshooting. IsolatingaTroubletoa CircuitSection. IsolatingTroubleinTransistor Circuits. ReplacementandRepair. EtchedCircuitBoardRepair. ComponentReplacement. EtchedConductorRepair. TransistorandSemiconductor DiodeReplacement. ReplacementofElectron Tubes. AttenuatorProbeRepair andReplacement. Replacementin Housing. ReplacementofLampDSI. 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 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. AttenuatorSection. 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. 4-23. 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.ExternalModulation. 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.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. 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.Indicators,.:.!:.1:=3 UsedinPhase-LockOperation (Model608FOnly). OverallBlockDiagram,Models 608Eand608F. FabricatedTestEqUipment. LubricationPOints,RF1merDrive Mechanism. FrequencyAccuracyandResettability TestSetup. ResidualandinCidentalFMTestSetup. RFOutpJ.tTestSetup. UncalibratedRFOutputTestSetup. ExternalSine-WaveModulationand ModulationMeterTestSetup. EnvelopeDistortionTestSetup. PulseModulationTestSetup. RFLeakageTestSetup. FrequencyControlInputTestSetup. SynchronizationTestSetup. LocationPowerSupplyand ModulationMeterAdjustments. ModulationMeterCalibrationTest Setup. Patternon140Oscilloscopeat50% 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. 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. LocationofElectronTubes. ReplacementofOscillatorand AmplifierTubes. DisassemblyofAttenuatorDrive Cable.,. AttenuatorProbe,ShOWingPickup LoopandImpedanceMatchingNetwork RFGeneratorAssemblyLocationof UnlabeledParts(SideCoverRemoved) Model608ERFGeneratorAssembly ShoWingLocationofUnlabeledParts (TopCoverRemoved). Model608FRFGeneratorAssembly ShOWingLocationofUnlabeledParts (TopCoverRemoved). RightSideView ShowingLocationof UnlabeledChassisComponents. LeftSideView ShowingLocationof UnlabeledComponents. RearView ShowingLocationof UnlabeledChassisComponents. CircuitBoardPartsIdentification. SchematicWormationlllustration_ 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 ) , ) 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 ResistanceMeasurement. 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 SignalGenerators(seeFigure1-1)aredesignedto meettherequirementsofprecisionlaboratorywork, andyettobeequallyusefulforgeneralapplicationsin theVHFfrequencyrange.TheModel 608Efurnishes RFsignalsfromO.1microvoltto1 voltfrom10MHz to480 MHz,whiletheModel608FsuppliesRFsignals fromO.1microvolttoO.5voltinafrequencyrange from10MHzto455MHz.TheRFcarriercanbe amplitudemodulated byinternallygeneratedsine- wavesignals,orbyexternallysuppliedsine-waveor pulsesignals.TheMooel 608Fcontainsfrequency controlcircuitrywhichpermitstheinstrumenttobe usedinphase-lockoperationwiththeModel 8708A Synchronizer.Thisprovisionprovidesastabilized outputacrossmostoftherangeoftheinstrument, withadriftfactorof<2 x10-1per10minutes.The instrumentscanbeusedfortroubleshooting,testing, calibrating,measuringstanding-waveratios,and checking antenna andtransmissionlinecharacteris- tics.Topreserveaccuracy,equipmentdesignholds spuriousmodulationto a low valueunderalloperating conditions.Detailedspecificationsfor bothinstru- mentsarelistedinTable1-1. 1-3.FREQUENCY. 1-4.Thefrequency ofthec.1tpu!signalisindicatedon adirectreadingdial,thecalibrationofwhichisaccurate tobetterthanO.5%forthe608Eandl%forthe608F, whenthecursorandFINEFREQareproperlyaligned. Calibrationaccuracymaybeimprovedfurtherbyuseof a built-in crystal-controlledheterodynecalibratorwhich furnishes1MHzcheckpointsfrom 10MHzto270MHz,or 5MHzcheckpointsovertheentirefrequencyrangeofthe instrument.Atanycheckpointthecalibrationcanbeset veryelO8etothecalibratoraccuracyof0.01%,bringing overallaccuracytoatleastO.O5%.Flequency check pointsignal.eareobtainedwhenaheadphoneset(not fumi.ehed)ispluggedintotheXTALCAL OUTPUT jack. Thecontrolfortheoutputattenuatoriscalibratedinboth decibelsandvolts. Whentheinstrumentisconnectedtoa 5Q.ohm resistiveloadandpowerintotheoutputattenua torisexactlyattheATIENUATOR CALIBRATEDmark (+7 dB)ontheRF OUTPUT meter,thelevelofpoweror voltageappliedtotheRFOUTPUTconnectormayberead directlyontheA1TENUATORdialwithanaccuracyof 1 dB. Whenconnectedtoa 5O-ohmresistiveload,the VSWRattheRF OUTPUTconnectorwillnolbegreater than1.2(SWRof1.6dB).Thesignalgeneratorsfeature automaticoutputleveling,maintainingtheRFoutput within1dBoftheadjustedoutput. 1-5.MODULATION. 1-6.TheRFoutputsignalcanbeamplitudemodulated byinternallygenerated400orlOOO-cydesinewaves, externallyappliedsinewavesabove1.0 voltrmsover thefrequencyrangefrom20Hz lo 20 kHz,orexter- nallyappliedpulsesof10voltspeak-lo-peak.When pulsemodulated,thesignalgeneratorsarecapableof producingpulsesofRFenergyasshortas4micro- secondsatSignalfrequenciesabove40MHz,andpulses asshortas2microsecondabove 220MHz.Thedegree ofsine-wavemodulationiscontinuouslyvariablefrom oto90%by afront-panelcontrol.Allsine-wavemodu- lationoftheoutputsignaliscontinuouslymonitored andindicatedinpercentageon adirectreadingmodu- lationmeter. 1-7.RFI. 1-8.RFleakageisheld to aminimumandissuch thatwhentheoutputsignalisadjustedforO.1micro- volt,theconductedsignalleakageatanyotherfront panelconnectorandtheradiatedleakagetwoinches fromtheinstrumentareeachlessthan1.0microvolt. 19.AUXILIARYEQUIPMENT. 1-10.MODEL 11509A FUSEHOLDER. 1-11.Toprotecttheoutputattenuatorfromdamage, forsomeapplications(suchastransceivertesting)it isdesirabletoinserta fuse betweenthesignalgen- eratorsandexternalequipment.The 11509Aisa specialcoaxialfuseholderwhichhousesa type 8AG, 1/16ampfuse whichprotectsthe outputattenuator fromdamageintheeventthatanexternalvoltageis accidentlyappliedtotheRFOUTPUTconnector.The fuseholderhasaninsertionlossofO.50dBat200MHz, O.56dBat300MHz,and0.65dBat400MHz;tis SWRisnotgreaterthan1.35 when connectedtoa 50- ohmresistiveload. 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-Packard1nstrumentscarryatwo-sec- tion,eight-digitserialnumber.Thefirstthreedigits areaprefix.Thecontentsofthismanual applyto thoseinstrumentshavingtheserialnumberprefix shown onthetitlepage.Iftheserialprefixonyour instrument1s not mentioned onthetitlepage, inthe Appendixtothismanual,orina Manual Change Sheet enclosedwiththemanual,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 atanyfrequencywhenRFoutputmeterindicates ATTENUATORCALIBRATED. input.Avoltagechangefrom-2voltsto-32volts willchange theoutputfrequencymorethan0.2% atthelowendofeachbandandmorethan1%at thehighendofeachband.Nominal4Kninput impedance,directcoupled.Voltagelimits: OV.:appliedvoltage.:-50V. OUTPUTCHARACTERISTICS 608E608F OutputLevel: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,and 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). Accuracy: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:everyotherMHzfrom13Uto27UMHz; every5 MHzabove270 MHz. Leveling:InternalfeedbackcircuitretainsAT- TENUATOR CALIBRATEDreferenceonRF outputmeteroverwidefrequencyranges(typi- callyoctavebands).Adjustmentoffrontpanel AMP.TRIMMERcontrol(only)formaximum RFoutputindicationautomaticallyrestoresini- tialcarr.ierlevelforgreaterfrequencychanges. Impedance:50n;reflectioncoefficient<0.091 (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