HP-431B-Manual-SN233 电路图.pdf

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1、HP Archive This vintage Hewlett Packard document was preserved and distributed by Please visit us on the web ! Scanned by on-line curator: Tony Gerbic For FREE Distribution Only * RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 013701 OPERATINGANDSERVICEMANUAL MODEL4318 SERIALSPREFIXED:233- POWERMET

2、ER CopyrightHEWlETT.PACKARDCOMPANY1962 ISOIPAGEMILLROAD,PALOALTO,CALIfORNIA,U.S.A. Printed:DEC1962 RadioFans.CN 收音机爱 好者资料库 TableofContents TABLEOFCONTENTS Model 431B Section IGENERAL INFORMATION. . 1-1.Description. 1-6.Accessories. . . 1-8.InstrumentswithOptions 1-10.InstrumentIdentification Page 1-

3、1 1-1 1-2 1-2 1-2 Section 4-25. 4-31. 4-33. 4-36. MeterCircuit. . . . . . DCCalibrationandSubstitution RegulatedPowerSupply. PowerSwitch. . . . Page 4-4 4-4 4-4 4-5 VMAINTENANCE.5-1 5-1.Introduction .5-1 ITINSTALLATION .2-15-4.CoverRemovalandReplacement.5-1 2-1.Inspection. .2-15-6.TopCoverRemoval5-1

4、 2-3.Installation.2-15-7.TopCoverReplacement.5-1 2-5.RackMounting2-15-8.BottomCoverRemoval5-2 2-9.Three-ConductorPowerCable2-25-9.BottomCoverReplacement5-2 2-12.PrimaryPowerRequirements2-25-10.SideCoverRemoval5-3 2-15.InitialBatteryOperationCheck2-35-12.TestEquipment5-3 2-17.RepackagingforShipment2-

5、35-14.Troubleshooting5-3 5-17.ThePowerSupply5-3 5-21.10-KCOscillator-AmplifierCheck5-4 illOPERATION3-15-27.10-KCAmplifierCheck.5-7 3-1.Introduction.3-15-32.MeteringandFeedbackCircuit.5-7 3-3.MechanicalAdjustmentof5-34.SquaringCircuitChecks.5-7 MeterZero.3-15-40.BatteryandChargingChecks5-7 3-5.Contro

6、lsandIndicators3-15-42.BatteryCheck5-7 3-7.OperatingInstructions3-15-45.ChargingChecks5-8 3-9.BatteryOperation3-15-50.BatteryWarranty.5-8 3-11.BatteryChargingTimes3-15-52.Repair.5-8 3-13.BatteryChargeCheck3-15-54.MechanicalAdjustmentof 3-15.MajorSourcesofError,MicrowaveMeterZero5-8 PowerMeasurements

7、3-15-56.Adjustments.5-9 3-17.PowerMeterAccuracyof1%or5-57.PowerSupplyAdjustments5-9 GreaterUsingtheDCSubstitution5-58.OscillatorFrequencyAdjustment5-9 Method.3-55-63.CoarseNullAdjustment.5-9 3-21.EquipmentUsedforDCSubstitution3-55-69.ZeroandVernierControl 3-24.AdditionalApplications3-5Adjustment.5-1

8、0 5-70.FullScaleAccuracyAdjustment5-10 5-71.PerformanceCheck5-10 IVTHEORYOFOPERATION4-15-74.ZeroCarry-OverCheck5-10 4-1.OverallDescription4-15-75.CalibrationandRangeTracking 4-6.CircuitDescription.4-1Accuracy.5-11 4-7.RFBridgeCircuit4-1 4-12.MeteringBridgeCircuit 4-2 4-17.SynchronousDetector4-2VIREP

9、LACEABLEPARTS6-1 4-21.DifferentialAmplifierQ104/Q1054-36-1.Introduction.6-1 4-23.FeedbackCurrentGeneratorQ1074-36-4.OrderingInformation.6-1 ii 01370-1 Model 431BListofIllustrationsandTables LISTOFILLUSTRATIONS NumberTitlePage 1-1.Model 431BPowerMeter.1-0 2-1.The CombiningCase2-1 2-2.StepstoPlaceInst

10、rumentinto CombiningCase2-2 2-3.AdapterFrameInstrumentCombinations.2-2 2-4.Two Half ModuleinRackAdapter2-3 2-5.RepackagingforShipment.2-3 3-1.FrontandRearPanelControlsand Indicators.3-2 3-2.Turn-OnandNullingProcedure3-3 3-3.DCSubstitutionTechnique3-4 3-4.PermanentRecord.3-5 3-5.IncreasedResolution.3

11、-6 3-6.LevelerSetup .3-6 3-7.MonitorControlSystems.3-7 3-8.DeterminingInsertionLossorGain.3-7 NumberTitle 4-1.BlockDiagram. 4-2.RFCircuit. . . 4-3.MeteringBridgeCircuit. . . . 4-4.NullingCircuit 4-5.SynchronousDetector. 4-6.DifferentialAmplifier . . 4-7.FeedbackCurrentGenerator. . . 4-8.MeterCircuit

12、. . . . . 4-9.DCCalibrationandSubstitution. . . 4-10.RegulatedPowerSupply. 4-11.PowerSwitchArrangement. 5-1.CoverRemoval . . 5-2.Top View. 5-3.PowerMeterAssembly. 5-4.PowerSupply. . . . Page 4-0 4-1 4-2 4-2 4-3 4-3 4-3 4-4 4-4 4-5 4-5 5-0 5-6 5-13 5-14 LISTOFTABLES NumberTitlePage 1-1.Specifications

13、1-1 1-2.Model 431BThermistorMounts1-2 3-1.VoltmeterReadouttoPowerMultipliers.3-6 5-1.TestEquipment. . . . .5-1 5-2.Troubleshooting. . . .5-3 5-3.PowerSupply DC VoltageChecks.5-5 5-4.PowerSupplyRippleChecks. .5-5 5-5.10-kcOscillator-AmplifierDC Voltage Checks. . . . . . . .5-5 5-6.10-kcAmplifierDC Vo

14、ltageChecks.5-5 5-7.DCVoltagesinSquaringCircuit. .5-5 5-8.DataforCalibration,TrackingAccuracy Check. . . . . .5-11 01370-1 6-1.ReferenceDesignationIndex 6-2.ReplaceableParts. . . . 6-2 6-10 iii Model 431B SECTIONI GENERALINFORMATION SectionI Paragraphs1-1to1-4 1-1.DESCRIPTION. 1-2.TheModel431BPowerM

15、eter,withtemper aturecompensatedthermistormounts,measuresrf powerfrom10microwatts(-20 dbm)to10milliwatts (+10dbm)inthe10-mcto40-gcfrequencyrange. Directreadingaccuracyoftheinstrumentis3%of fullscale.Instrumentspecificationsaregivenin table1-1. 1-3.Thedesignof the Model431Banditsthermistor mount,resu

16、ltsinalmostcompletefreedomfrom measurementerrorcausedbyambienttemperature changes.Theinstrumentincorporatestwoself- balancingbridgeswith onearmofeachbridgebeing athermistor.Thetwomatchedthermistors,both locatedwithinthemount,arethermallycoupled,but I electricallyisolated.Onethermistorisusedto absorb

17、rfpower;theotherisusedtoprovidetemper- aturecompensation.Thus,thethermaldriftproblems normallyassociatedwiththethermistor-powermeter arrangementhavebeengreatlyreduced.Asingle settingoftheZEROcontrolonthemostsensitive powerrangeismaintainedwithin1%forallhigher powerranges. 1-4.Thetemperaturecompensat

18、edthermistor mountsusedwiththeinstrumentarespecificallyde- signedforModel431A/BPowerMeters.Coaxial and waveguidethermistormountscoverthe10-mcto 40-gcfrequencyrange.Table1-2givesthermistor mountoperatingfrequency,mountconfiguration,and operatingresistance. Table1-1.Specifications InstrumentType: Auto

19、matic,self-balancingfortemperaturecom- pensatedmounts PowerRanges: 7rangeswith fullscalereadingsof 10, 30, 100 and 300J.Lw;1, 3 and 10 mw.Alsocalibratedin dbmfrom-20to+10. ExternalBolometer: Temperature-compensatedthermistormounts requiredforoperation(478A and 486Aseries). Accuracy: 3%offullscalefro

20、m+20C to+35C,5%of full scalefromOCto+55C ZeroCarry-Over: Lessthan1%offullscalewhenzeroedonmost sensitiverange Recorder/VoltmeterOutput: Phonejackonrearwith 1mamaximuminto 1000 ohms10%; onesidegrounded CalibrationInput: Bindingpostsonrearforcalibrationofbridgewith 8402APowerMeterCalibratororprecisedc

21、 standards PowerSupply: 115or230volts10%,50to1000cps,2-1/2watts Dimensions: 6-17/32in. (16.6 cm) high,7-25/32in. (19.77 cm) wide,12-1/2in. (31.75 cm)deep 01370-1 Weight: Net 8lb(3.63 kg) withcoverandcables11-1/2lb (5.44 kg) includingbattery;shippingapprox.13lb (5.9 kg) AccessoriesFurnished: 5 ft (1.

22、5m)cablefortemperature-compensated thermistormounts.7-1/2ft (2.3m)powercable, NEMA plug. AccessoriesAvailable: 431A-95ARechargeableBatteryPackforfield installation. Models 478A and 486AThermistorMounts Model 8402APowerMeterCalibrator Model HOl-8401ALevelerAmplifier Options: 01.Rechargeablebatteryins

23、talled,providesup to24hourscontinuousoperation, 02.Rearinputconnectorwiredinparallelwith frontpanelinputconnector, 10.With20footcablefor100nor200nmount, 11.With50footcablefor100nmount, 12. With 100footcablefor100nmount, 13. With200footcablefor100nmount, 21.With50footcablefor200nmount, 22.With100foot

24、cablefor200nmount, 23. With200footcablefor200nmount. 1-1 SectionI Paragraphs1-5to1-11 Table1-2.Model 431BThermistorMounts TypeOperating FrequencyResistance CoaxialWaveguideRangeinohms FjJ478A10mcto10gc200 FjJS486A2.6to3.95 gc100 FjJG486A3.95to5.85 gc100 FjJJ486A5.3to8.2 gc100 FjJH486A7.05to10.0 gc10

25、0 FjJX486A8.2to12.4gc100 FjJM486A10.0to15.0 gc100 FjJP486A12.4to18.0 gc100 FjJK486A 18.0to26.5200 FjJK486AC* FjJR486A 26.5to40.0200 FjJR486AC* * Withcircularcontactflangeadapter 1-5.TheModel 431BhasprovIsIonsforusingthe dcsubstitutionmethodofmeasurementandforcheck- ingcalibrationaccuracyofthepowerme

26、ter.Thedc substitutionmethodofmeasurementwhichrequires otherequipmentprovidesgreaterpowermeasurement accuraciesthancanbeobtainedbythepowermeter 1-2 Model 431B alone.Inadditionajackinserieswiththepanelmeter permitsdigitalorchartrecordingofmeasurements, operationofalarmorcontrolsystemsanduseina closed

27、-looplevelingsystem. 1-6.ACCESSORIES. 1-7.TwoaccessoriesaresuppliedwiththeModel 431BPowerMeter:a7-1/2-foot,detachablepower cableand a5-footcablethatconnectsthethermistor mounttotheModel 431B.Thermistormountsare available(seetable1-2)butnotsuppliedwiththe instrument.Arechargeablebatterywithinstallati

28、on kitisalsoavailable.Alistofsuppliedandavailable accessoriesisgivenintable1-1,Specifications. 1-8.INSTRUMENTSWITHOPTIONS. 1-9.TheoptionsavailablewiththeModel 431B PowerMeteraregivenintable1-1.Thethermistor mountcableoptionsrequiremodificationandrecali- brationoftheModel 431BPowerMeter.Therecali- br

29、ationproceduresforthecablesaregiveninsection V,Maintenance.Forfurtherinformationastothe orderingofoptionsetc.,contactyourlocalFjJEngi- neeringRepresentative. 1-10.INSTRUMENTIDENTIFICATION. 1-11.Hewlett-Packardusesatwo-sectioneight-digit serialnumber(000-00000).Ifthefirstthreedigitsof theserialnumber

30、onyourinstrumentdo notagree withthoseonthetitlepageofthismanual,change sheetssuppliedwiththemanualwill definedifferences betweenyourinstrumentandtheModel 431Bdescribed inthismanual. 01370-1 Model 431B SECTIONII INSTALLATION Section II Paragraphs2-1to2-8 2-1.INSPECTION. 2-2.Thisinstrumentwascarefully

31、inspectedboth mechanicallyandelectrically,beforeshipment.,It shouldbephysicallyfreeofmarsorscratchesandin perfectelectricalorderuponreceipt.Toconfirmtliis, theinstrumentshouldbeinspectedforphysicaldamage intransit.Alsocheckforsuppliedaccessories,and testtheelectricalperformanceoftheinstrumentusing t

32、heprocedureoutlinedinparagraph5-71.Ifthereis damagordeficiency,seethewarrantyontheinside rearcoverofthismanual. 2-3.INSTALLATION. 2-4.TheModel431Bisfullytransistorized;there- forenospecialcoolingisrequired.However,the instrumentshould notbeoperatedwheretheambient temperatureexceeds55C (140F). 2-5.RA

33、CKMOUNTING. 2-6.TheModel 431Bisasubmodularunitthatwhen usedalonecanbebenchmounted only.However, whenusedincombination withothersubmodularunits itcanbebenchand/orrackmounted.Thecombining caseandadapterframearedesignedspecificallyfor thispurpose. DIVIDERLATCH 2-7.COMBINING CASE.Thecombiningcaseisa ful

34、l-moduleunitwhichacceptsvaryingcombinations ofsubmodularunits.Being afull-moduleunit,itcan bebenchorrackmounted analogoustoanyfull-module instrument.Anillustrationofthecombiningcaseis showninfigure2-1.Instructionsforinstallingthe Model 431Bina combiningcaseisgivengraphically infigure2-2. 2-8.ADAPTER

35、FRAME.Theadapterframeis arackframethatacceptsanycombinationofsub- modularunits.Itcanberackmounted only.An illustrationoftheadapterframeisgiven infigure2-3. Instructionsaregivenbelow; a.Placethdapterframeon edge ofbenchas shown instep!J figure2-4. b.Stathesubmodularunitsintheframeasshown instep2,figu

36、re2-4.Placethesperclampsbe- tweeninsrumentsasshown instep,figure2-4. c.PlaceAJ!acerclampsonthetwo endinstruments (seestep,figure2-4) andpushthecombination intotheframe. DIVIDERASSEMBLY RETAINER MP-5-1178 01370-1 Figure2-1.TheCombiningCase 2-1 Section II Paragraphs2-9to2-13 Model 431B STEPCD SLIDETOP

37、PART TOLIMIT STEP SLIDE BOTTOM PART TOLIMIT STEP PUSHINTOLIMIT STEP) SLIDEOVERTOLIMIT STEP PUSHDOWN TORELEASE STEP PLACE INSTRUMENT INTO CASE STEP0 SET RETAINER BACK INTO PLACE STEP PUSHUPTOLOCK Figure2-2.StepstoPlaceInstrumentinto CombiningCase d.Insertscrewsoneithersideofframe,andtighten untilsubm

38、odularinstrumentsaretightintheframe. Figure2-3.AdapterFrameInstrumentCombinations i o o I FILLERPANEL o o LD-S-IIDI . Ie.Thecompleteassemblyisreadyforrack mounting. 2-9.THREE-CONDUCTOR POWER CABLE. 2-10.Toprotectoperatingpersonnel,the National ElectricalManufacturersAssociation(NEMA)rec- ommendsthat

39、theinstrumentpanelandcabinetbe grounded.AllHewlett-Packardinstrumentsare equipped with athree-conductorpowercablewhich, when pluggedintoanappropriatereceptacle,grounds theinstrument.Theoffsetpinon thepowercable three-prongconnectoristhegroundwire. 2-11.Topreservetheprotectionfeaturewhenoper- atingth

40、einstrumentfromatwo-contactoutlet,usea three-prongtotwo-prongadapterandconnectthe greenpigtailon theadaptertoground. 2-12.PRIMARY POWER REQUIREMENTS. 2-13.TheModel 431Bcanbeoperatedfromanacor dcprimarypowersource.Theacsourcecanbeeither 115or230volts,50to1000cps.Thedcsourceisa 24-voltrechargeablebatt

41、ery.Therechargeable batteryissuppliedwith option01instrumentsonly. 2-201370-1 Model 431B 2-14.Foroperationfromacprimarypower,the instrumentcanbeeasilyconvertedfrom115-to230- voltoperation.TheLINE VOLTAGEswitch,S1a two-positionslideswitchlocatedattherearofthe instrument,selectsthemodeofacoperation.Th

42、e linevoltageforwhichtheinstrumentissettooperate appearsontheslideroftheswitch.A15/100-ampere, slow-blowfuseisusedforboth115-and230-volt operation. CAUTION 00NOT CHANGE THE SETTINGOFTHE LINE VOLTAGE SWITCH WHEN THE POWER METERIS OPERATING. 2-15. INITIAL BATTERY OPERATION CHECK. 2-16.Thefollowingappl

43、iestooption 01instruments orinstrumentsthathavefield-installedbatteries. WhenthebatteryisusedastheModel 431Bpower sourceforthefirsttime,performthefollowingsteps: a.ConnectModel 431Btoacsource.SetPOWER switchtoCHARGE andchargebatteryforaminimum of 16hoursorovernight.Note:thebatterycanbe maintainedint

44、hechargingstateindefinitelywithout damagingthebattery.Itwillassumeitsfullcapacity, 1.25amperehour,and nomore. b.Performturn-onproceduregiveninfigure3-2 with POWERatAC.Iftheprocedurechecksout normally,proceedtostepc. CD ADAPTER FRAME -/ - SPACERCLAMP RETAININGSCREWS Figure2-4.Two Half ModuleinRackAda

45、pter 01370-1 SectionII Paragraphs2-14to2-18 c.Repeatturn-onproceduregiveninfigure3-2 with POWERatBATTERY ON.Ifoperationisnotthe sameasthatobtainedwithacpowerapplied,referto sectionVparagraph5-40,BatteryandChargingCheck. 2-17.REPACKAGING FOR SHIPMENT. 2-18.TheModel 431Bisshippedinafoam-packand cardbo

46、ardcarton(seefigure2-5).Whenrepackaging theinstrumentforshipment,theoriginalfoam-pack andcardboardcartoncanbeusedifavailable.Ifnot available,theycanbepurchasedfromHewlett-Packard Co.(refertosectionVI,misc).Usethefollowingas ageneralguideforrepackagingtheinstrument. a.Placetheinstrumentinthefoam-pack

47、asshown infigure2-5. b.Markthepackingbox withItFragile,Delicate Instrument,etcasappropriate. Note IftheinstrumentistobeshippedtoHewlett- Packardforserviceorrepair,attachtothe instrumentatagidentifyingtheownerand indicatingtheserviceorrepairtobeaccom- plished,includethemodelnumber,and full serialnumb

48、er,oftheinstrument.Inany correspondence,identifytheinstrumentby modelnumber,serialnumberandserial numberprefix. _INSTRUMENT Figure2-5.RepackagingforShipment 2-3/2-4 Model 431B SECTIONIII OPERATION Section III Paragraphs3-1to3-16 3-1.INTRODUCTION. 3-2.TheModel 431BPowerMetermeasuresrf powerrangingfro

49、m.01to10milliwattswithpower meteraccuracyof3%.Sincethezerocarriesover within1%,accuraciesofatleast4%canbe obtained on anyrangeby asinglezeroingon only thelowest range. 3-3.MECHANICALADJUSTMENTOF METERZERO. 3-4.Theprocedureforperformingthemechanical adjustmentofthemeterzeroisgiveninsectionV, paragraph5-54. 3-5.CONTROLSANDINDICATORS. 3-6.Thefrontandrearpanelcontrolsandconnectors areexplainedinfigure3-1.Theexplanationsare keyedtocorrespondingcontrolsandindicatoron the drawingofthefro