HP-430B-Manual-sn-461 电路图.pdf

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1、 HP Archive This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! On-line curator: Glenn Robb This document is for FREE distribution only! RadioFans.CN 收音机爱 好者资料库 1 INSTRUCTIONANDOPERATINGMANUAL FOR MODEL430B MICROWAVEPOWERMETER Serial461andAbove HE

2、WLETTPACKARDCOMPANY 395PAGEMILLROAD.PALOALTO.CALIFORNIA.U.S.A. RadioFans.CN 收音机爱 好者资料库 GeneralDescription TheModel430BMicrowavePowerMeerisdesignedforinstananeous powerrneasurernentsdirectlyindecibelsorrnilliwats.Theinstrurnentcanbe usedatanyrnicrowavefrequencyforwhichtherearebolorneterrnounts.Itcan

3、rneasureeithercontinuousorpulsedpowerandoperateswithinstrurnentfuses, barrettersortherrnistorsof100or200ohrnvalue. Powercanbereaddirectlyinrnilliwattsfrom.02to10mw,ordbrnfrorn -20to+10dbm.Powerwhichexceedstheratingoftheinstrumentrnaybemeas- uredbyaddingattenuatorsordirectionalcouplerstothemicrowaves

4、ystern. PartsSubstitutions DiffIcultiesinprocuringsomeofthepartsusedinthisinstrurnentmay causetheelectricalorphysicalvaluestodevIatefromthoseshowninthisin- structionrnanual.Thesesubstitutionshavebeenmadesoasnottoimpairthe performanceofthisinstrument.Wheneverreplacernentofanyoftheseparsis necessary,e

5、itherthesubstitutevalueortheoriginalvaluemaybeused. . o RadioFans.CN 收音机爱 好者资料库 1 , INSTRUCTIONS MODEL430B MICROWAVEPOWERMETER Specifications PowerRange- Milliwatts 1 . 3 1.0 3.0 10.0 Accuracy- 50/0offullscale. ReqUiredExternalEquipment DecibelsAboveorBelow1Mw. -10 -5 o +5 +10 o ., - ro . Q) U) Bolo

6、meterandmount.Bolometer200ohmsatapproximately8.75Ma. positivetemperaturecoefficient,or200ohmsatapproximately7.0Ma., 100ohmsatapproximately12.0Ma.,negativeemperaturecoefficient. PowerSupplyRating- Voltage-105to125/210to250vols Frequency-50/60cycles/sec. Wattage-75watts Cables InputCable TypeofCable R

7、G-58/U -1- Length 3ft. Termination UG-88/UPlugon oneend,notermi- nationotherend. OverallDimensions- 12-1/411wldex9-3/4 11 highX10-1/811deep Weight 19lbs. OperatingInstructions Inspection- ThlSlnsrumenthasbeenthoroughlytestedandlnspectedbeforebeing shipped. AfterthelnSrumenisunpaked.itshouldbecareful

8、lyispectedfor anydamagereceivedintransit.Ifanyshippingdamageisfound,followthe procedureoutlinedintheClaimforDamageinShipmentpageatthebackof thislnsructionbook. ControlsandTerminals ON-Thistoggleswichcontrolsthepowersuppliedtotheinstrument fromthepowerhne. FUSE-Thefuseholder,locatedontheconrolpanel.c

9、ontainsatwo amperecartridgefuse.whichmaybereplacedbyunscrewingthefuseholder capandinsertlg aewfuse.Useaoneamperecartridgefusewhenthein- strumetisoperatedon210to250volts. COARSEZERO-Thisvarlableresistorprovidesacoarseadjustment ofthemeterzeroindication. FINEZERO-Thisvariableresistorprovidesaflneadjus

10、tmentofthe meterzerolndication. DBM-MW-ThisrangeswitchlSusedtoselecthedesiredpowermeas- urementrangeoftheinstrunlen. RESISTANCE-ThlSswitchisusedtoselectthedesiredoperatingresis- tanceofthebolometer. COEFFICIENT-Thisswitchisusedtoselecttheappropnatetempera- i:urecoefficienofthebolometer. -2- , (J) Cl

11、 1-/ . III . A InputJack-ThisUG-185/UjackwillfitanyoneoftheBNCseriesof connectors. CAL.-ThebindingpostsmarkedCALarelocatedontopofthechassis andareconnectedtotheinputofthevoltmeter.ThebindingpostmarkedGis connectedtothechassis.Theyareusedtomeasurethecalibratingvoltages forthevoltmeter. Operation- BEF

12、ORETHISINSTRUMENTCANBEOPERATED.ABOLOMETER MOUNTOFTHECORRECTCHARACTERISTICSMUSTBESELECTED. CAUTION:THEMAXIMUMDCBIASCURRENTAVAILABLEATTHEJACK NECESSARYFORTHERMISTOROPERATIONONTHELOWERRANGESIS SUFFICIENTTOBURNOUTABARRETTER.HENCECARESHOULDBE TAKENTOSETTHECOEFFICIENTANDRESISTANCESWITCHESTOPOS AND200,RESP

13、ECTIVELY.BEFORECONNECTINGABARRETTER. ThecrystaldlOdeCR1isconnectedinaprotectivecircuittolimitthe surgevoltageattheBNCjackincasethebolometerisconnectedafterthein- strumentisturnedon.However,thereissomeevidencetoindicatethatbar- rettersmaygraduallychangetheircharacteristicsifrepeatedlyconnectedand dis

14、connectedwhentherangeswitchisonthelowerranges.Eventuallyit-may notbepossibletozero-settheinstrumentonthetoprangeWIthsuchabarret- ter.Hencetoavoidthispossibility,ifitisnecessarytoconnectabarretter withtheinstrumentturnedon,itisadvisabletosettherangeswitchtothetop (10Mw)rangefirst.Fusesmaybesafelyconn

15、ectedatanytimeprovidedthe COEFFICIENTandRESISTANCEswitchesaresetproperly,whilethermistors canbeconnectedunderanyconditions: TheModel430Bisdesignedtooperatewithabolometerwhichhasa positivetemperaturecoefficient,suchasaSperrytype821barretteroraone- hundredthampereInstrumentfuse,orwithabolometerwhichha

16、sanegative temperaturecoefficient,suchasaWesternElectricD166382thermistor. Anybolometerissuitableprovidedthemeterindicationcanbebrought tozero.AwidevariationinDCbiasisprovidedoneveryrangeinorderto accommodatevariationsbetweenindividualbolometers.Becauseofthegreater sensitivityonthelowerranges,somebo

17、lometerswhichmaynotbeusableon -3- thetoprangeWlllbeusableonthelowerranges.Thesolecriterion1Swhether ornotthemetercanbezeroed.AllnormalbarrettersandHewlett-Packard selectedfusescanbeusedonallranges.However,thereisawidevariation amongthermistorsandsomemaynotbeusableonthetoprange.Nothermis- torswIllwor

18、kat200ohmsonthe10mwrange,however,astheytaketoelittle powertomake200ohms. Step-by-StepOperatingProcedure: 1.Connectthebolometerandmounttotheinputcablesuppliedwiththe Model430B.DONOTAPPLYRFPOWERYET. 2.SettheCOEFFICIENTandRESISTANCEswitchestotheappropriate settingsforthebolometerbeingused. 3.Settherang

19、esW1tchtothe10Mwrange. 4.TurnontheInstrumentandallowatleastfiveminuteswarm-up. 5.SettherangeswitchtothedesiredrangeandadjusttheFINEZERO. COARSEZEROconr01sforanapprox1matelyzerometerindication. 6.ApplyRFpower0thebolometer.AdjustthetumngdeVIceonthe bolometermount.ifany,formaximummeterindicatlOn. 7.Swi

20、tchofftheRF,zero-setthemeterprecIsely,andswitchonthe RF.TheresultantmeterInd1catIon1SthepoweroutputoftheRFsource1n milhwattsanddbaboveonemilliwatt. NJTE:Alwaysadjustzero-setimmed1atelybeforetakingareading,as themetermaydriftslowly.especiallyonthelowestranges,beforetheinstru- mentisthoroughlywarmedup

21、orafterswitchingranges. ItwillbenotedthatwithnobolometerconnededandtheNEG-POSswitch inNEGpositionthemeterreadsdownscale,ind1catIngoscillation.Thiscondi- tionisquitenormal.InthePOSpos1tionthecircuitactstoincreasethebolo- meterreS1Stanceuptotheoperatingvaluebyaddingaudiopower.Sinceanopen CIrcuitatthej

22、ackispractically1nfiniteres1stance,thereisnotendencytooscil- late.IntheNEGposition,however,thecircuitactstodecreasethebolometer resistancedowntotheoperatingvalue.Henceitosc1llatesWlthnobolometer conneced.buildinguptoavaluelimitedbytubeoverload. -4- . o , CircuitDescription TheModel430BMicrowavePower

23、Meterconsistsofaself-balancing bridgeoscillator,aDCbiascircuit,avolmetercircuit,andaregulatedpower supply(SeeFig.1). Theosc1llaormcludesthecircuiassociatedWIthV1,V2,andV3.The outputofthebndge1SfedintotheinpuofV1.V 1andV2amplifyhesignal, whileV3isacathodefollowercapableofsupplyingthenecessarypower.Th

24、e outputofV3isfedbacktothebndgeinphasew1ththeinputtoV1.sothathe systemoscillates.ThefrequencyofoscillatlonissetbythetuedCircmt(L1, C3)inthebridgeandisapproximately10.6Kc. Onearmofthebridge1Sthebolometer.anon-linearresistor.Itsresis- tanceisdeterminedbythetotalamountofpowerbeingdissipatedInit.Further

25、, itsresistancedeterminestheoutputofhebridge.Iftheresistanceistoolow, saylessthan200ohms1nthecaseofapositivetemperaturecoefficientand200 ohmsoperatingresistance,thebridgeoutputincreasesandhelevelofoscilla- tionicreases,increasingtheaudiopowerinthebolometerup0apointwhere theresistanceisincreasedto200

26、ohms.Ifit1Stoogreat,heaudiolevelde- creasestothepOlntwheretheres1stanceisagain200ohms.Theactionissuch astokeepthebolometeratitsoperatingreSIstanceatalltimes. Inordertocahbratetheinstrumen,itisnecessary.0beabletosetthe aud.oleveltoadeftmevalueoneachrange.Thisisaccomplishedbysubstitu- tingDCpowerforal

27、lthepowerrequiredabovethegivenaudiolevel.Thezero- setcircuitprovIdesthebiasDCpowerandenablestheusertosettheproper audlOleveloneachrange.SufficientDCpowerisavailableoneachrangeto compensateford1fferencesbetweenIndividualbol.ometersandforvariationsin ambienttemperature. InmeasuringRFpower,thecircuitac

28、tionisthesameaswhenvaryIng theDCpower.ApphcationofRFpowertothebolometercausestheoscHator leveltodecreaseautomaticallysothatthechangeinaudiopowerisexactly equaltotheapphedRFpowerandthetotalpowerinthebolometerremainscon- stant.Avoltmetermeasuringthechangeinaudiovoltagecanthereforebecali- bratedinterms

29、oftheRFpower. ThevoltmeterC1rcu1tconsistsofV4andV5andafull-waverectifierand meter.SincetheadditionofRFpowertothebolometercausestheaudiovolt- agetodecrease,aspecialmetenngcircu1twasdevisedtomakethemeterread upscale.ADCcurrentflowshroughthemeterintheforwarddirechon,ofsuch magmtudeastocauseareadinghigh

30、erthanfull-scale.Therectifiedaudiois thenappliedinthereversedirection,buckingdotheDC.Astheaudiode- reases,thebuckIngactlondecreasesandthemeterreadsupscale. -5- Thepowersupplyfortheinstrumentincludesafull-waverectifiercir- cuitandadegenerativevoltageregulatorcircuitwhichmaintainsconstantplate supplyv

31、oltage. Maintenance CoverandBottomPlateRemoval- Thecoveroftheinstrumentisremovedbyunscrewingthefourscrews atthebackoftheinstrumentandslidingthetopofthecoverawayfromthepanel. Thebottomplatecomesoffwhenthefourscrewsinheplateareremoved. TubeReplacement WhenreplacingtubesintheModel430B,anytubeofaveragec

32、haracter- isticscanbeused.However,whenV4,V5,orV9arereplaced,itmaybe necessarytoadjustthenassociatedcircuits.Theadjustmentsareperformed asfollows: ReplacementofV4orV5- WhenreplacingV4orV5,itisdesirabletocheckthegain metercircuitasthiSmayaffecttheaccuracyoftheinstrument. isasfollows: ofthevolt- Thepro

33、cedure 1.Withabolometerconnected,settherangeswitchtothe3Mwrange. 2.ConnectanaccuratevoltmetertotheCAL.bindingpostsonthedeck. 3.AdjusttheFINEZERO,COARSEZEROcontrolssothattheexternal voltmeterreads.465volts. 4.IftheModel430Bmeterdoesnotindicatezero,adjustR34sothat itdoes. 5.AdjusttheFINEZERO.COARSEZER

34、Ocontrolssothattheexternal voltmeterreads.190volts. 6.IftheModel430Bmeterdoesnotindicatefullscale,adjustR41so thatitdoes. 7.Repeatsteps3,4,5,and6asacheck. -6- CIl nl I . III .- 3q.lJ177/51 Ser/alITo ., 230V 60 Jl Self-balancing Voltmeter - - BridgeOscillator - Tubes - Tubes- V4,V5 VI,V2,V3 Ml - I -

35、j -. DCBiasCircuitRegulated (Coarse:,FN:IEGANGEO IN14 7500 rII oS-30,S-3bARE GANGED 8 2 .2.,f (START!BLACKn,T2 n,l2 (FINISHI BLK.-REO (fiNISH) PRI.-2 BLK,-YEL PRI.-I (START)BLACK TRANSfORMERDETAIL E (START)BlK.-GR. L PRI. I BlK-YEl ,0-60)(FINISH) (START)BlK-GR PRI2 BlK-RED. 230V 5060) A., 1500 L2 12

36、5Mh R65.1 1500.II oEO.ASEZE:0IFINEZEAol AO!J R6226 220 A5 .00 ITDB A0 l2EJ 1-5DBI HD8M! E!mEI 1500 0- 1-10D8MI 110DBMI C25 Oll R58 68K C7, .:!.IOlll = A50 1K AOt OOO o 11+1.1.;,.-.R7 25K ._-1 tS-3b1008MJ II_-.,-.9_. V7 6AVGT,If.65 C21 .Ollt F22 40vf AO A., +500 ,3:1: V7.181/3 TI . !fUSE! NOTES CONDI

37、TIONSOFDCvOLTAGE MEASUREMENT I.115/230VOLTS,5cr60CYCLEF I POWERSUPPLY,2 A Z.MEASUREMENT TAKENBE- TWEEN THE INDICATED POINTS AND CHASSIS WITH A VOLTMETER OF 122MEG- OHMSINPUTRESISTANCE. 3. BOLOMETER CONNECTEDTO INSTRUMENT.RESISTANCE. COEFFICIENT CONTROLSAD- JUSTEDTOMATCH BOLOMETER TOINSTRUMENT, OTHER

38、 PANEL CONTROLS HAVE NOEFFECTONDCVOLTAGES CAPACITYINIJIJFUNLESSOTHER- WISE NOTED KslOOOOHMS. M-lMEGOH. ELECTRICALVALUE ADJUSTEDAT THE FACTORY. AvERAGEVALUE SHOWN. PART MAYBEOMITTED. o!PANELCONTROLI oISCREWDRIVERADJ.I -4=-CHASSIS ODE SCHEMATICDIAGRAM SERIAL461 OFMODEL aABOVE 430B Model430BTopView.Cov

39、erRelTloved. Model430BBottomView.BottomPlateRemoved. :! p N) o C 111 r- CII o CD :a CI) - Cf) -f o OJ o :a c o . -t - - . -i -l 0 010-200I! 09-.22JLF to o .) .tb , N ., R14-IOOIf+ - C6:25,uF .00 .2rR8-670 R6-200Ei-OUR5-200 , i o o-0 . )Q w 0 0. (1) . .,. w 0 lJj (1) Ul . Ul . 0 Ii lJj 0 III Ii 0. tj

40、 (1) . I!100 III . . Ul 00 W lJj N lJj . /T30B/I./.s-I Se.-i.1III/tJ. SWITCHSHOWNINTHE 1-10DBMIPOSITION S3A RM 8500 o1200 IO J 2001 IOO SIB C25 ,.I 50J,1FR66 CAL.I 2000 R55 3000 Fig.4.Model430B.RangeSwitchDetail(S3ab) R2 12 R6 200 Sib SWITCHSHOWN IN200n.POSITION R5 71J_-_a200 R4 10tt -4J,I_f_-I 013

41、_O.UJ-.-.j RI01 -)t.-.IA.-S3b R53R55ROTOR 3000 F 5Mdel430BResistanceSwitchDetail 19.0 CRI R6 200 SWITCHSHOWNIN POSITIVEPOSITION R7 -1715 R8 670 Fig.6.Model430BCoefficientSwitchDetail TABLEOFREPLACEABLEPARTS o . N LC) -. o. . :-. r- Circuit Ref. Cl CZ C3 C4 C5 C6 C7abc C8 C9 ClO Cll C1l C13 C14 C15 C

42、16 Description Capacitor:fixed,paper, 1 flf,ZO%,400vdcw Capacitor:fixed,mica, 500f,10%,500vdcw Capacitor:fIxed,silvermica, 1800f.5%,500vdcw Capacitor:hxed.paper, 1f,20%.400vdcw Capacitor:fixed.paper, 1,ZO%,400vdcw Capacitor:fIxed,paper. 25.200vdcw Capacitor:fIxed.electrolytic, 10.10,10f,450vdcw Capa

43、citor:fIxed,mica. ZOOlJ.j.!f.10%,500vdcw Capacitor:fIxed.paper. 22,20%,400vdcw Capacitor:fixed.mica, 200f.L.lO%,500vdcw Capacitor:fixed.paper, 22f.20%,400vdcw Thiscircuitreferencenotassigned Capacitor:fixed,paper. 03.+30%,-10%,600vdcw CapacItor:fixed,paper, 03f,+30%.-10%,600vdcw Capacitor:fixed,mica

44、. 150,10%,500vdcw Capactor:fixed,paper. 01f.10%,600vdcw -hp- StockNo. 16-35 14-500 15-19 16-35 16-44 16-36 18-31 14-Z00 16-48 14-200 16-48 16-13 16-13 14-150 16-11 Mfr.*Tanty is effectiveforoneyearafter deliverytotheoriginalpurchaserwhentheinstrumentisre- turned,transportationchargesprepaidbytheorig

45、inalpur- chaser,andwhich uponourexaminationisdisclosedtooursatis- factiontobe defective.Ifthefaulthasbeen causedbymisuseor abnormal conditionsofoperation,repairswill be billedatcost. Inthiscase,anestimatewill besubmittedbeforetheworkis started. Ifanyfaultdevelops,thefollowingstepsshould betaken: 1.N

46、otifyus,givingfull detailsofthedifficulty,andinclude themodelnumber,typenumberandserial number. Onreceiptof thisinformation, we will give you serviceinstructionsorship- pingdata. 2. Onreceiptofshipping instructions,forwardtheinstru- mentprepaid,andrepairswill be madeatthefactory.Ifre- quested,anesti

47、mateofthechargeswill bemadebeforethework begins providedtheinstrumentisnotcoveredbythewarranty. SHIPPING AllshipmentsofHewlett-Packardinstrumentsshould be made via RailwayExpress.Theinstrumentsshould be packed in a wooden boxandsurroundedbytwotothreeinches of excel- siororsimilarshock-absorbing material. DO NOT HESITATE TOCALLONUS HEWLETT.PACKARDCOMPANY .J:attJrattJry#ntrumn,fir efpudand.5/5uuracy 395PAGEMILLlOADPALOALTO,CALIF. /,