HP-335B-Manual 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 INST R U C TIONAND0PERATINGMANUAL FOR . MODEL335B F.M.MONITORand MODULATIONMETER TypeN

2、o.92848 HEWLETT-PACKARDCOMPANY 395PAGEMILLROAD,PALOALTO.CALIFORNIA.U.S.A. RadioFans.CN 收音机爱 好者资料库 eJl.BLEOFCON1 1ENTS . . SPECIFICAIONS INTTIODUCTORY. UNPACKING. . . . . . . . 0 . 1 1- INSTALLATION. Location. 0 ElectricalConnections 2- .2It:- 2 L._ . OPERATION. Controls. OlermoduletionIndicator. . I

3、NITIALADJUSTUENTS. . . 34- 6,- .6f- .7f- M.SASU:REITENTS. .8 MeasurementofAMonFf1c8.rriers,8 ModulationCheck. 10 MAINTENANCE. 12 DailyMaintenance. 12 TubeReplacemont. .12 Sta.ndardizingofComparison OscillatorFrequency.l RFTuninG. .l ChangeofChannel. .14 CIICUITDESCIUPTION. . 15 BriefCIrcuitDescripti

4、on.15 DetailedCircuitDoscription.0.17 Ihoseflntriesabovethat:1dit 1:3stron:.:;lyrecomIn0rdedthatthos(;ntl.1.es bt;YeadthoIol:ghlybeforoattomptingtoput tnisInstrwTIentintooperatio. RadioFans.CN 收音机爱 好者资料库 -hp- MOD:EL335B FMFREQUENCYMONITOR ANDMODUL.A.lIm!lETRR SPECIFICATICNS FREQlJENCYMONITOR Frequen

5、cyRange:Any frequenClJfron86mcin108raCeSuppliedwithcrystal offrequencymatchingcustcmer1stransmitter. DeviationRsnge:+3kcto-31:cmeanfrequeroydev:iD.i:ione Accuracy: + Deviationindicatoraccuracybetterthen1000cps(-,00110) PowerRequired:Approximately2wattsaOpere:te s:J8.tisfactorilyatlevoJ.s aboveandbel

6、ow2watts. WDULATION1TER: ModulationRange:Meter10adsfu11SGaleonmodulationswing0f100kc. Scalecalibratedto100%at75kc;133%at100kco .I.ccuracy:lithin5%modulationP9lCoutageOlarenGiresca180 MeterChara.oteristies:lJlctGr dampedine.ccord8noevvithFcr;requirementsc Readsr;euk:valueofmodulationpeal-cordurutionb

7、etweenLoand90milli- seconds.Iii.eterreturnsfromfullreadingto10%offullvaluowithin500 to800milliseconds, .frequencyR3sponse:Flatwithin:!:bfrom30to15000CpSI ExternalMeters:ProvisionsaromadeforinstDlls.tirmorrdllotsmetor havingfullscalesensitivityof400micro31.peres.Scaleshouldindieate 100%modulationat30

8、0m:cro3I!lpercs.Extrameterscanbestlppli.Jdwithunit. PE,KLIMITINDIC.TOR PeakLimitRnngG :From5010to120%moduJ.uti.on(75kc:=100%),Provision. forexternalXaleindicatorSg AUDIOauTPUT +J_ FrequoncyRange:illcpsto20kCgResponseflntv/ithin-ib.Equippcd Withstcnciard75microseccnddt3-cmphusisclrcuit. Distortion:Le

9、sstmn0.2510at100%modulntione I Ou-bputVoltal!,C:10voItsinto20OOOor-.nlSatlowfrequoncioslJ.t100%medu- Tntiona-:CJOVJfreqel1eies i:ToiGe: At lOE-st75dbbelownudiooutputlnrolrcsul-i;:i.ngfromlOO;smodulation atlawfrequencies .Monitorinr,Output:L,oIllllinto600ohms bnJEme(lD.t100%modulationat10/ irequoncic

10、s( ;Frontpanollo-rx19:x13deepe Powor:115volts50/60cpsprimarypower.ReqUiresffpproximately150volts -c. -hp- MODEL335B FMFREQ,uENCYHONrrOR ANDMODULATIONSTEF I N TRODU CTORY TIle-p-Madol335BFMrelencyMonitoraDd I:IodulationMeteIhasbeendesignedformonitoringthe carrierfrequencyandmodalationofFMuroadcasttra

11、ns- mitt2rs. TIleinstrur.1enta1.:0demoduls.i.;est:lecar:rie!to provideessentiallydistortion-freeaudiooutputfor auralmenitaringandformeasuringtrrti18mittCIperform- ancecharacteristics.Eleir.strul.I.enthpowelapplied). Thistuningshouldbemadeasfolows: (1)Tn8dustcovershouldberemovedfromthe instrument(lSw

12、itchshJuldbemidwaybetweenUSEane, CARRIRLEVELpositions. (2)TuneC2.(markedlIIULl:mchassis)foramax- imumreadingonMODULATIONmeter. (3)Tunec6(marlcedOSCond1assis)onthe highfrequencysideofresonancefora lead:Lllga.boutJ.51 belowthemaxirrnmattainable0Onthehighfrequ.;mcyside ofresonancethemoterreadingvariesm

13、uchsowe.,thanon tIlelowfrequencysidGasc6istunedoBytnnlnt?;15f- ormoredowninlevel,thefrequencya;oscIllationis madepracticallyindependentoftuning. (4)IfthereadingontheMODULATIONmeter1snJiV lessthan40,a new6AC?tubeshouldbeinserteda.ndallowed toheatfortwentyminutesormore.1heproceedureshould thenberepeat

14、ed. CliANGEOFCHAN1TEL Ifitisnecessarytoretunetheoscillator completelyas,forexa:mple,when a newcrystal.foradiff- erentchannelisinserted,thefollowingpocedureisre- cO!Tllnended. -14- WithnocrystalinthecircuitorwhentilO newcrystalisinserted,areadingofabcut20isGften obtaiedontheMODULATIONr:1eterwhenthesw

15、ttchis:1io.- waybetw8entheUuEandCARRILEVbLpositions.TIis readingiscausedbyosdllationduotothE200kct1.lned circuitsintheplateandsc.peencilcuits. Now,performstepU)above.ThelODULAlION meterreadingwillfall(;ff;I11enc6istlmedtothepropcr fJ.equency(unlessC2shouldhappe!ltobetunec.properly, L1whichcasetheItI

16、ODULATIOI,jl!leterreadil.g.vilJ.rise)0 Nowperformsteps(2)and(3)intatorderto completetheJet,Hlingoftheoscillator.Thereisaposs- ibilitythatC2(MULT)canbr.:;tunedtotrewrongharmon.ic, becausethettmingrans.)ofC2isabout;25%IrLdtheci1Guit tu.YJ.6Stothefourthhar:-.1oniGofthp.crystalcThiscanoe avoidedbyreloov

17、lngthebottompltefromtheHod01335B andobservingthatconder-selC2(lvTCLT)isadjusteJll.earr.llnirnurn capacityfortLehigher:hann01sandnearmaximu.:r:chp9.cityfo:!. thelowerc1:Ja!lnels.Anotl:erindicatic1cf,.121in3C2totheoJIT.ion: harmonicisthattheCARIERDEVIArrONmeterillread:;.ff scalewhentheWodel335Bisretur

18、nedtoservice. Itshouldalac,berome:,:absredthattll.efreq.lency ofoscillatorVIC2.nbeadjustedo-,.-eraral.1seofseveral kcofthetransmitterantennafre1ucncybymer:msofte CRYSTALTUNINGcontrol.Theref8r.;,whenusing,newcrystal, teModel335DshouldnotbeuBsdonanewchanneluntil thecrystE.lf:requency(andthustlJaCClJIB

19、CYoft1er!iodal335B) hasbeencheckedaccuratolyortheMojel3353zeroedagainst atranSlaitterwhosefrequencyislUlOwnattht;)timeofC01Jl- parison. CIReU ITDESCRIPTION BRIEFDESCHIPTIONOForF;RATIOl Thegeneraloperationofther10de13353canbe describedbyreferrin;tothebl0kdiagramonPage18. Thetransmitterfrequencyi8comb

20、inedwttanaccurately controlledfrequencyderivedfroacrystal-controlled oscillatorintheinstrwnentsottransmittorfrequoncy (fxmittGr-200kc).Thooutputofthecrystalcontrolled ThofrequencycOli.1torcircuitsareofthopulse integratingtypeandaredesignedtoprovideahighdegree oflinearityoverthefr8quencyImge01100l:ct

21、J300lr.c Adirectcurrentmeterintheoutputcircu.itofthesecounter tubesisusedtomeasurethefreqt.:lercyd0viD.tionofthecarrier. InordertoJ.se a meteofadequatesenstivity,adecor.:pen- satingcurrentexactlyeClualtothecurrentgenerated.1nthe countercircuitswith200kcappliedisusedtobthroughvb,andconsequentlyv4and1

22、51 is,toahighdegree,independentoftheamplitudooftho drivingsi3nalontubesVLandv5 TheoperntionofsvritchingtJ.besv4lR33vntil finallyC22isfUllychargedtoavoltagevhichis(,xatly equaltotheconstantcurrentprovidedbyV9flowing throughR33.Inthismanner,apulse01accuratolycon- trolledcurrentflowsthrouhC22forGachalt

23、ernativehalf cycle.Ina 8i:UIla.r lnariller,thoswitchingof:13g0Leratcs apulseofaccuraelycontrolledcrrontthroughc26. C22andc26providoanaddicionalfunction. 3inceC22isfullychargedwhenthevoltaisochang88soo.s tocausevBtoconduct,theanodeoftub0V7islwlc1ata lowvoltage,thusassIstinginthecut-offofV7atthe -19-

24、. instanttubevBbeginstodrawcurrent.Inthismanner,tho timeofriseofcurrEmtconductionintubesV7aYldvBis Gxtremelyrapidsothateitheronotubeortheothoris conductingtheentireCOr-still1tcurrent. IfthecircuitconstantsaresoarrangedthatC22 andc26arefullychargedwithin1/2cycleofthehighest frequencyinvolv:)d,thoamou

25、ntofcurrentflowingthrough C22isafunctionoffrequencyonyThocurrentpulses flowingthroughC22andc26arcrectifiedbymeansofa bridg3rectifier,andthersultingdccurrentisappliedto M2.ThisoperationmakestheresponseofM2directlypro- portionaltofreqJ.ency.Inor-dertobalaJ.1cGoutther08.clYlg whichvlJouldbeobtain3don1:

26、12v.rtth a200kcsic;nal,some currentisappliadinroversothroughI.I2.Thiscurrentis generatedbyavoltagedropacrossresistorR37which carriestheSalTI-:currentwnichflowsthroughcurrent10- ulatortUbeV9andthroushswitchingtubesV7orVB. Thesensitivityofthiscircuitasafrequency metGrisdirectlyproportionaltothisconsta

27、ntcurrent. ThebalancittgcurrentL.1themete:cvariesinexact accordancewiththeconstantcurrent.Thus,shouldthere bevariutionsineithertheconstantcurrentorinthe characteristicsofthetubes,theneterwillstillread zerocentervith200!Cappllec:.Thecurrentappl-!.ed.tote deviationmeterconsist8oftubes.ThehUDvoltageisp

28、ickedupinl:r3, amplified.inVIOA,andappliedasacontrolsignalOYlV9. Thisfeatureisofimport:ll1cewhentheequipmentisuS6dfor meas1.lringpurposesc Meter-HIisalsoarrangedtomeasurethe gridcurrentofthemi.xertube.VVhe11thefw.i.tchisint21e CARRIER IEVELposition,MeterTIlisconI1.Gctedtothebrill circuitofV2A.sotntt

29、hegridr,ur:entdrcWYlbyV2Abecause ofapplicaU.onofinputvoltaecanbedetermined.When switcllS2isinapositionhalfwaybetweenUSEaI1.dCABRIBH LEVEIJ,meterMlisconnectea.soastomeasurethE;gric. currentofV2A3eneratedbytheapplcatonofvoltage fromtholocaloscillator.rhus,thutWll7.lGoft:recircui8 inthescreenandplateof

30、VIcanbeadj.lstedtomakesure adequatevoltag.isobtainedfromthelocalcrystaltopTO- videpropermixingaction. DE;-emphasisoftheaudiov(,ltajoisol)taineciby anetworkR52dndc46inthegridofv16So Vl+,ilOB,V13,andv15p:covi.duaregulatedv,)lcage supplyfortheoperationofthecriticalcircuitsinthe equipment.V12togetherwit

31、hTl,Lll,L12,C32,033,and034 providethedcpowerfortheoperatlonoftheequipment. Therectifiercryutalsintheoutputofthe switchini.StUbesandotheroriticalcompollontsr:Hef5.1tered ardby-passodtoeliminateopur)ousrlplekupWhLC:o.otheIwise mighthaveadeleteriouseffectontheoperationofthe equipm.ont -21- CHARTOFCRYST

32、ALF?c.lQUEJCrES FOMODEL33.5J3 F.1.1.TRANSrUTTER335Bl . T11JNSIVIITI:R335BJ;i CHAI!1:nLPTEuEHCYCRYJTALFiFQ.CfiANNELFRLQUEI:CYRTTALlBF -_.- ;:;22._-_tJ._Id.,. 201881 tt4 Q5251 981L895 I/ 2028a3.c525298;3 4905 20 8805 1 25398.5 -915 _15 20L8G7 Wi-25 2L:_98.7 L925 88.9Li1-35255 98()h93520.:; 20689;1 -fi

33、Ji.1i5 25099.1.1+91i5 207 893 -J-55257993 Cic;5 ,+, 208 8951;,65258 995J-9C.5 20gGn? 41.7525099iJ7 li(lS I:. r/I, 2108009LJ:55260 99.9L!:9!5 2i-l- 901 hj.92611001 1+995 21290;3 ;TrJ 262100,35005L_O:J i?:_ 90;5IiSlS 26?: 100$5501S 90.7l-i-52526.:-100,75025 21590;9 1 )r.J 265100Cj o5 tt-1i:; g04521b91

34、.1 Ce 2661011 ,././ 2179 ., L555267101035055.:; 2J.8 9151!-565263101.55065 21991.7:)75269101,75075 22091.,9t58527() 101.25085 221921 459:52T1 102.15095 22292.3 L60527210235105 22 q251+615 27,? 102,55115 ,. ? L;-625271.-102.75125224- .-.I 22) _,2 2.9 4635275102.9 5-ti ;:T204t)Ii.s27b103.1 ._-;= 93.1

35、.)1S 22793.3L655277103.35155 22t3 9.35 Ic.6e; 2781()J5S165_v 22993.7);.67527910375175 230 9 16280103,95185 .:-85 2319.1. 4695281 -ioJ.f.oJ. 519 23291:.34705282104,35205 239L.5171 28? 1055215 i.l./ .Lt 23L:. L.72510475225 9.7 28Lt: -., 235qL:.-9 1i-75 285loLo95235 . 2369;1 47+5 28D105.1 525 9)7 95.3

36、I.r 287105J 5C:r (.-r (/:J c.:;:;) 23895.5476528810555?-65 2IQ 95.7477528910507 5;75 2t6 9591785290109 5)Jc- ,-;.; 21.196.179j291-10.f u S295 2)12 96.3)G05292106.)5305 2L39651.;.81529310655315 24.1+96.71825291L106.75325 24596.9483529J.06195335 246971 -BE 296107.5JTSl.!-Lj. 217973 11ncc; 2971073c;55

37、.0,),.j 211-8 975 L;.865290 10755365 2t9977 I 299107,75375,+875 25097.94885300107.95385 -22- TABLEOFRl:PLACEABLEPPRTS ir_ cuit RefoDescription -np- StockoUo, Aanufncturer and lype 1+-1-4.,_-4 Cl CPACITOR:variable(trimmertype); approx25mmfmnx;lockingWpeshuft 12-15 SillkGs-Tnrzio.n: J-2Lp C2 C3 cL C5

38、C.AP.ACITOR:vc.riable(trimmertypo); approx50mmfmax;lockinstypeshoft CAP_ICITOR:oeromic;47mmf;500VdCV7 CAPACITOR:micn;5000mnd;300vdcw CAPACITOR:silvermioo.;620mmf-t5%; 500vdow I.2-16 115-34 I 114-14 I 15-12 Srkes-Tnrzian; J-55L E1octricfl1Reactanoe Corp:SI-7EPa NJicA.mold:Typ0;1 Sangnmo:TypeJ C)ACITO

39、R:silvormica;1800l;500 VdCVl CAP1CITOR:silvermica;620mmt5%; 500vdcw c6 C7 C8 CPACITOR:variablo ap!Jrox,ilOOmmfm.ax; t.f) rlmmorcypo lockingtypeShC.ftI12-17 115-19 I , I 15-12 Sarkes-Trzlan: J-lO:5L S:ugmao:TypeCR C9 C10 Cll CAPACITCR:mioa;5000nJci;300vdow CAFACIOR:ceramic;NPO:22mmf;500 vdcw CAPACITO

40、:mioa;5000mmf;300vdcw .14-14 I 115- 2 I IJ.-14 rt.i.ca.mold:TypeW ElectricalReact6r1CE Corp:CI-2 Mi.camold:Type; C12C.PAC:lTOR: mic a ;1000rmd;300vclcw JV(icamold:Typo)OXH C13CAPACITOR:ceremio;NPO:22mmf; 500vdcw c14CAP.ACITCR:paper;two;:lectionseach a,b0025mf;6covdow C15ICAPACIOR:mma;1000mrr;300vdcw

41、 c16CAPACTi.CR:mica;1000mmf;300vdcw C17CAPACITOR:mica;1000nwf;300vdcw 115-21 I I17-14 I I14-11 1 14-11 I14-11 Elc:ctrical:leaotlUlcE Corp:CI-2 C.elleralElectrL: 23:F628 fl:iaarnold:TypeOXM Miaarnold:TypeOXM Jliliuamold:TypeOXM GeneralE1ectric: 23F467GI03 W.cumold:TypeOXM 14-11 CAPACITOR:paper;1mf;60

42、0vdcw CAPACITOR:mica;1000mmf;300vdcwC18 C19 1; 7-12 IC20CAPACITOR:paper;1mf;600vdcv.17-12GeneralE18ctric: L_-,._._-,-l._.t)L;iii.!=.),.67IG1.0_1:-_J -25.- TABLEOFREPLACEABLEPARTS Cir- cuit Ref.Description -hp- StockNo. Hanufacturer and Type 021 CAPACITOR:ceramic;1000mmf;feedthru type 15-21 Electrica

43、lReactffilre Co:cp:OF-1 C22CAPACITOR:ceramic;NPO:110mmf=-210 15-22Elect!icalReacta.1re Corp:SI-7 C23Thisreferencenotassigned. c24 a,b CAPACITOR:paper;twosectionseach 0.25rnmf;600vdcw 17-14 GoneralElectric: 23F628 C25 CAPf,CITOR:paper;0.05mf;600vdClJ16-15 Aerovox: Type84 026CAPACITOR:ceramic;NPO;110m

44、mf:-2% 15-22ElectricalRoactanre Corp:SI-7 C27 CAPACITOR:cerandc;1000mmf;feedthru15-21 type ElectricalReacta.1) Corp: CF-l 028Thisreferencenotassigned CAPACITOR: type ceramic; 1000mmf;feedthru1521 El0ctricalReactanre Corp:OF-l C30CAPACITOR:dryelectrolytic;50 mf; 50 vdcw 18-50Mallory:TC-39 C31Cl.PACIT

45、OR:paper;1mf;600 vdcw 17-12GeneralElectric: 2p467G103 C32 CAPACITOR:paper;4mf; 600vdcw17-10 Cornel1-Dubilier: TLA6040 C33 CAPACITOR:papar;4 mf; 600vdcw1710 Cornell-Dubilier: TLf6040 17-10CAPf.CITOR:paper;4 mfj 600vdewCornell-Dubilier: I TIl-6040 C35ICAPlI.CITOR:paper;1Tllfj60()vdcw17-12GeneralElectr

46、tc: II23F467GI03 C36ICAPACITOR:paper;1 mfj 600 vd.c17-12I,Geil.eralElectric: i23F467GI03 C37,ICJACITOR:paperj4 mfj 600vdcw17-10Cornel1-Dubilier; TLA6040 I- C38A1_C_A_P_h._C_IT_O_R_:,_P_8._ p_o_r_;._1_mf_;._6_0_0_V_d-:CW;:;,-:- .l-_1_7_-_ 1 _ 2 ,GeneralElectric: 23F467GI03 -24. TABLEOFREPLACE.IJ3LEPA

47、RTS C-5) -72 ance XM Cir- cuit -hp-,Manufacturer Ref.Description StockNo.andTyPc . c38nCAPACITOR: paper,:1mf;600vdew 17-12GenoralElectric: 23FL67Gl03 C39 CAPACITOB:paper;4m.fl:; 600vdc,.17-10 Corne11-Dubi1ier: TLA6040 c40C/.PACITOR:dryelectrolytic; 10rof;18-10 Mallory:Typelffi 450vdci; 1 041CiACITOR

48、:silvermica:NPO; 62mmf;15-25Aeravox: Type14 500vdmTI C42ICl.PACrfOR:dryelectr:)lytie; .50mf;18-50Mallory:TypoT I 50vdcw c43ICAPACITOR:papar; 1ml;600vdcw17-12 GeneralElectric: I 23F467GI03 cl+4CJ.PACITOR:mica;1000mmf;300vdcwI 14-1000Micamold:Type C45CAPACITOR: paper;1mfj600vdcw17-12 Gp,neralElectric:

49、 I 23F467GI03 c46CAPACrrOR:silvermtce.;510romf510; 15.24Micamald:TypeP I500vdcw I c47CJ;PACITOR: cera.m.i.ej110romf15-2? I E1oetriea1React, Carp:81-7 c48Thisreferencenotassigned. C49 C50 C51 CfUlACITOR:mica;150rrunf;500vd.cw ClACITOR:mica;150mmf;500vdew CAPACITOR:mica;150f;500vdew 14-150 14-150 Micamo1d:TypeOXM MiC8J1l.01d