HP-200S-Manual-SNP-001-103-129-229-332 电路图.pdf

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1、Ul o o Cl Q. 1: 200S OSCILLATOR OPERATINGANDSERVICEMANUAL HEWLETTPACKARD :I 11 o (1 / RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 OPERATINGANDSERVICEMANUAL (HPPARTNO.00200-91902) MODEL200S OSCILLATOR SERIALSPREFIXED:332- Appcnd.tx C,ManualBackdaUng Changes, adaptsthismanualtoSerialsPrefixed:229-

2、. 129-, 103-,001-. CoprlghtHelllett-PackardCompany1959 P.O.BoxJOt.Loeland.Colorado,80537U.S.A. Printed:JULY1965 RadioFans.CN 收音机爱 好者资料库 Model 2005 TABUOFCONTENTS Table of Contents ListoflllustrationsandTables SectionPage IGENERAL DESCRIPTION.I-I I-I.General.1-1 1-2.InstrumentIdentification.1-1 1-3.o

3、werCable1-1 1-4.230-VoltOperation.I-I 1-5.IncomingInspection. . . . . . . . .1-1 IIOPERATING INSTRUCTIONS. . . . .2-1 2-1.OperatingProcedure.2-1 2-2.OutputCircuitOptions. . . . . .2-1 Section IVMAINTENANCE 4-1.Introduction. 4-2.TestEquipmentRequired. 4-3.PerformanceCheck. 4_4.Cabinet Removal. 4-5.23

4、0-VoltOperation. 4-6.PeriodicMaIntenance. 4-7.AdjustmentProcedure. 4-8.Troubleshooting. 4-9.RepairandReplacement. Page 4-1 4-1 4-1 4-1 4-2 4-2 4-2 4-2 4-5 4-5 IIITHEORYOFOPERAnON. 3-1.General. 3-2.Frequency-ControllingBridge. 3-3.Amplifier. 3-4.OutputCircuit. 3-1 3-1 3-1 3-1 3-1 vREPLACEABLEPARTS 5-

5、1.Introduction. 5-2.OrderingInformation. 5-1 5-1 5-1 Appendix ACODE LISTOFMANUFACTURERS BSALESANDSERVICE OFFICES CMANUAL BACKDATING CHANGES LISTOFILLUSTRATIONS NumberTitlePageNumber TitlePage 1-1.Model 200SOscillator.1-04-2.Cal1brationTestSetup. . . . .4-3 4-3.AlternateCalibrationSetup.4-3 2-1.Contr

6、olsandTerminals2-0 4-4.DtstortionTestSetup. . . .4-4 . . . . . . . . 4-5.Range SwitchDetail 2-2.TypicalOutput Connections2-1 .4-7 . . . . . . 4-6.Left Side View Model 200S.4-8 4-7.Right Side View Model 2000. 4- 3-1.Model 200S BlockDtagram.3-04-8.SerVicingEtchedCircuitBoards. 4-10 4-9.VoltageandResis

7、tanceDiagram.4-11 4-1.230-VoltOperation.4-24-10.Model 200SOscillator. 4-12 LISTOFTABLES NumberTitlePage 4-1.TestInstrumentsRequired4-0 4-2.Frequency/PeriodConversion4-1 4-3.DistortionTestFrequencies4-2 4-4.Troubleshooting4-5 4-5.ReplacementofCriticalParts. . .4-6 00087-3 5-1.ReplaceableParts5-1 iii

8、Specifications FREQUENCY RANGE: DIAL ACCURACY: FREQUENCYRESPONSE: MAXIMUMOUTPUT: ATTENUATOR: DISTORTION: HUMVOLTAGE: POWER: ACCESSORIESAVAlLA.BLE: Model200S SPE:ClfICATIONS 5cpsto600kcin 5ranges. :ildb,1000cpsreference. 3 Vrmsinto50ohms. Approximately10dbrange. LessthanO.S%below 500kCilessthan1%abov

9、e 500kc. Lessthano.1%ofratedoutput. 115/230 volt,.f:lJ50-1000cps,75watts. *l1000ACableAssembly,terminatedbydualbananaplugs. fjll001ACableAssembly.asabove,butwithoneBNCconnector. DIMENSIONS: WEIGHT: 1-0 CabinetM.ount: RackMount: Cabinet Mount: Rack Mount: 7-1/2wide,11-1/2high,14-1/4deep. I /J ,. j1 !

10、 . ft,. -, I -.,- , I !,tr 0-. ! . - .I : .joil too. - Net 23lbs.shipping29lbs. Net 27lba.,shipping 35lbs. 00087-2 Model200S 1-1.GENERAL. SECTIONI GENERALDESCRIPTION 1-3.POWERCABLE. Section I Paragraphs1-1to1-5 The Model 200Sisspecificallydesignedtoprovide thelowfrequencysignalsrequiredbytheModel 73

11、9AFrequencyResponseTestSet.Theoscillator coverstherangebetween5cpsand 600kcinfiveover- lappingrangesandwillprovideatleast3voltsinto a50ohm load.Sincetheinstrumentwasdeveloped foraspecificapplication,theoutputamplitudecontrol hasalimitedrange.Theminimumoutput into a 50 ohm loadisbetween1and2volts. Th

12、e Model 200S withtheModel 739AFrequencyRe- sponseTestSetmaybeusedtocheckthefrequency responseofvoltmeters,oscilloscopes,amplifiers,or filtersbetween5cpsand 10mc. Tohelpeliminategroundloops,theoutputterminals areungrounded.Ifa grounded outputisdesirable,a linkisprovidedtoconnect one oftheoutputtermin

13、als tothechassis. 1-2.INSTRUMENTIDENTIFICATION. Hewlett-Packardusesatwo-sectioneight-digitserial number(e.g.,000-00000).Ifthefirstthreedigitsof theserialnumberonyourinstrumentdo notagreewith thoseonthetitlepageofthismanual,changesheets suppliedwiththemanualwilldefinedifferencesbe- tweenyourinstrumen

14、tandtheModel 200Sdescribed inthismanual. Fortheprotectionofoperatingpersonnel,theNational ElectricalManufacturers,Association(NEMA)rec- ommendsthattheinstrumentpanelandcabinetbe grounded.Thisinstrumentisequipped with athree- conductorpowercable,which, when plugged intoan appropriatereceptacle,ground

15、stheinstrument.The offsetpinonthepowercablethree-prongconnector isthegroundpin. Topreservetheprotectionfeaturewhenoperatingthe instrumentfromatwo-contactoutlet,useathree- prongtotwo-prongadapterand connectthegreenpig- tailontheadaptertoground. 1-4.230-VOLTOPERATION. Thisinstrumentisnormallywiredforo

16、perationfrom anominal115 volt supply.Operationfroma 230 volt sourceiseasilyaccomplishedbyreconnectingthedual primarywindings onthepowertransformerinseries. Refertoparagraph4-5forconnectionprocedures. 1-5.INCOMINGINSPECTION. Uponreceiptofyour200S,checkthecontentsagainst thepackinglistandinspecttheins

17、trumentforany obviousdamagereceivedintransit.Tofacilitatere- shipment,keepthepackingmaterialuntilanopera- tionalcheckhasbeenperformed(seeparagraph4-3). Ifthereisanyapparentdamage,fileaclaimwiththe carrierandrefertothewarrantypageinthismanual. 11 1111 III tI,. 11 II III III III II, 00087-2 . Figure1-

18、1.Model 200SOscillator to .PUTVDE to J 1-1 SectionII Figure2-1 Mode1200S OUTPUTAMPUTUOE OSCILlATOR MOOELctj).00Ill HfWlTTCKAAD UN.JO .0 .10 ,Kl. .0IlfOO1111( :-,. MP-S-849A 1.Turnonpowertoinstrument.7.Jumperfor50 ohmunbalancedoutput. 2.Fuseonrearofinstrument. 3.Glows wheninstrumentisenergized. 8.Bal

19、ancedoutputterminalsinternalimpedance equals50ohms. 4.Readfrequencyofoperationmultipliedby RANGEswitchposition. 5.Vernier,adjustfrequency. 9.Adjustoutputvoltagelevel.Outputbalanced togroundonly withamplitudecontrolinfull clockwiseposition. 6.Selectfrequencyrangeofoperation.10.Dustcoverscrews. Figure

20、2-1.ControlsandTerminals 2-0 00087-4 Model 2008 sectionD Paragraphs2-1to2-2 SECTIONII OPERATINGINSTRUCTIONS 2-2.OUTPUTCIRCUITOPTIONS. Theoutputcircuitofthe Mode1200s maybearranged forbalancedorunbalancedoperation.Typicalcon- nectionsforeachareindicatedinfigure2-2. G son I .- -. , ToeqUipment beingdr

21、iven BALANCED OPERATION Gson Toequipment beingdriven UNBALANCED OPERATIO Figure2-2.Model200STypical Output Connections .,-, A.UNBALANCED OPERATION. TooperatewUhone sidegrounded, astrapIsplacedbetween the G terminalandthecenterterminal,aslndlcated in figure 2-2A. B.BALANCED OPERATION.Connections forb

22、al- ancedoperationareiDdlcatedinLi.gure2-2B.(The brokenline fromthegroundterminalindicatesthe outputcircuitI.abalancedtoground, withtheAMPLJ- TUDEcontrolatmaximum.) Ua 230 voit powersourceisused,check (a) thatpowertransformerT3I.astrappedfor 230-voltoperation(strapping opUona shown onschematicdiagra

23、m)and(b)that fuseFlis thecorrectsizefor 230-voitoperation.(see TabieofReplaceabiePartsforvalue.) NOTE 21.OPERATINGPROCEDURE. I)Withtheinstrumentplugged into a powersourceof specUied voltageandfrequency.andthepowerswitch atON.allow awarm-upperiodofapproximateiylive minutes.Where maximumaccuracyisdesi

24、red,this warm-upperiodshouldbeextendedatleasttothirty minutes. 2) The frequencyofthe output voltageI.adetermined by(a)thesetti01thefrequencydiaiand(b)theset- tingoftheRANGEswitch.Forexampie,toobtain a 1000-cycle output,setthe frequencydialat10 and the RANGEswitchatXloo(10 x 100 Is 1000). 3)Make the

25、connectionbetweenthe Model 2008 andthe equipmenttobedrivenattheterminalsdesignated 50n.(Connectionsarediscussedinparagraph2-2.) 4) AdjusttheAMPLlTUDEcontroltoobtainthede- siredoutputlevel. 00087-2 2-1 sectionill Figure3-1 1 CAlm FOllCIU SIACl V4 IMPLITUDI o Model 2008 POWR SltPlI.V INPUT-_-I llnov:;

26、C;-lDOO, PcwuSUPPlT 3-0 Figure3-1.Model 2008 BlockDiagram 00087-2 Mode1200S SECTIONIII THEORYOFOPERATION sectionIII Paragraphs3-1to3-4 31.GENERAL. The Model 200SOscillatorusesa balanced (push-pull) oscillatorcircuitfrom which the outputistakendi- rectly,avoiding the complication andpossibledistor- t

27、ion of an isolatingamplifier.Reaction oftheload on theosclllatorIsminimizedbytheuseof a lowim- pedance outputstage.Thisarrangementresuitsin a simple,trouble-freecircuithaving lowdistortionand highstabilityovertheentirefrequencyrange. Functionally,thecircuitsoftheModel 200S include a frequency-contro

28、ll1ng bridge and balancedpush-pull amplUierwhich constitutetheoscillatorcircuit,an outputcircuitwhich may bearrangedeitherforbal- ancedorunbalancedoperation,and apower-supply circuit.Theseareshowninblockdiagramform in figure3-iand indetailintheschematicdiagram. 32.FREQUENCYCONTROLLINGBRIDGE. The fre

29、quency-control1lngcircuitisarrangedasa floatingbridge,symmetricalwithrespecttoground. With no connectiontoground on anyterminalof the bridge,stabilityofcalibrationisassuredsinceany straycapacityand leakage to groundpresentatthe bridge outputterminalsdonotshunteitherthe frequency-controllingoramplitu

30、de-stabilizingarms of thebridge.Thefrequency-controllingcomponents (RC networks whicharevariedbyoperationofthe RANGEswitchand frequency dial)comprisetwoarms of the bridge, while theamplitude-stabilizingcom- ponents (a voltagedividerwhich includes athermally- sensitiveresistance)comprisetheothertwoar

31、ms. The amplitudeisstabilizedatsucha levelthatthe ampllllertubesareoperatedInthesubstantiallylinear portionoftheircharacteristics,which,togetherwith thelargenegative feedback atharmonicfrequencies, resultsIn averypuresinewaveoscillation. Thebridgeisfed by the balanced voltage developed at thecathode

32、sofV2andV40intheoutputofthe balanced amplifier.The output ofthefrequency-controlling branchof the bridgeisappliedtothegridofV3and the output oftheamplitude-stabilizingbranchisapplied tothegridof VI.Themannerin whichthevoltage- verSUS-frequencyandphase-versus-frequencycharac- teristicsof anRCnetworkc

33、anbe utilized with an amplifierofproperdesigntoachieve an OScillator 00087-2 whichdeliversa voltage ofexcellent stab1Uty and wave- formiswellcoveredintextssuchasTerman523C/D ELECTRONICCOUNTER 4000 VACUUMTUBE 200S OSCILLATORVOLTMETER I (!; IiJI (!; , , , , (!;(!;(!; Ii-. , I ,GC.)G. ./ 500.RESISTOR c

34、.Check toseethatalltubesareglOWing. a.WiththeInstrumentturnedoff,checktheresis- tancefromCI3to ground andtheresistance acrossC13.Thisresistanceistypicallymany megohms.Averylowreading(belowlOOK)Indi- catesashortedorleakycapacitorbetween the B+lineandground. b.Turntheinstrumenton,andallow Ittowarmup f

35、or atleast15minutes. TOEXT.OSCILLOSCOPE (OPTIONAL!o IOOE FREQUENCYSTANDARD l1P4000 VACUUMTUBE Figure4-2.CalibrationTestSetup ,on RESISTOR 200S OSCTILLAORVOLTMETER I lQJ: ,0 o0 SIIH , IA-. Ir_ G=-G ./ -VERt.HORIZ. a.Switch RANGE toXIOKand frequencyto50kc. d. Using the412A, 410BEleclronlcVoltmeters,or

36、 othersuitablevoltmeter,measurethepositive andnegative power supplyvoltagesusingground asareference.Thepositivevoltage(approxi- mately225 volts)maybemeasuredbetweenthe chassisand C14. The negative voltage(approxi- matey155 volts) Ismeasuredfromthechassis tothe junction ofR30,R31and R40(f1gure4-7). T

37、hedifferencebetween the negativeandpositive voltage should be 380volts75volts. 2)RecoveryTime: b.Connect the outputoUhe2008 to anoscilloscope. Figure4-3.AlternateCalibrationSetup 00087-2 4-3 Model 200S 2)Turn2005AMPLlTEfully clockWise, andad- lustRllfor3,5voltsonthe4000meter. E.OUTPUT VOLTAGE. I) Co

38、nnectthe2005,loaded,toa4000ACVoltmeter. frequencyrange.Thisgradualtaperisessentialfor linearity.(3) Bending ofplatesnearlhehighfrequency end shouldbeunnecessary. (Q330B OlSTOflTrOHANALYZER Figure4-4.DistortionTestSetup RESISTOR !iloos 7)TurnRMSVOLTS-DB switchcounterclockwise while continuallyadjusti

39、ng330BBAL.ANCEand I.NPUT untilthelawestpossibledip15obtained. 8) AdjustRSO(dynamicbalance)fora dip (minimum distortion)onthe330Bmeter,Repeatsteps7 and 8 untilthelowestpossibledip Isobtained. NatE:Foroptimumresultsuselawestfrequency settingofthe200S Wide RangeOscillator. 9)RepeatstepsI through 8,adju

40、stingall330Bcon- trolsfor50cps(60cpsif50cpslinefrequencyIs beingused)insteadcI.1000cps. 10) AdjustR51(Hum Balance)insteadof Dynamic Balance00step8. D.DISTORTION 1)Connectthe200Stoa 330BDistortionAnalyzer asshown infigure4-4. 2)Set 200s RANGEtoXlandthefrequencydialto 20. 3)The330Bswitchesshouldbeinth

41、efollowing positloos: a.AF-RFtoAF b.FREQUENCYto20 c.SelectorswitchtoSET LEVEL d.RMSVOLTS-DB switchsettothe+20dbposition 4) Adjust 330BINPUTcontrolforazerodbreference onthe330Bmeter. 5) SwitchselectortoDISTORTION 6)Adjust BALANCEandFREQUENCYcootrolsfora diponthemeter. OSCILLATOR 0 gJ - : G/ ,;,G 2)Fr

42、equencyDialTracking: a.Switch 20OSRANGEtoXlOO.Connect theequip- mentasshown infigures4-2or4-3. b. Checkthefrequencyat5.Thefrequencyread- ing shouldbe500cps:i:2%.U thefrequencyIs orrmorethan:i:2%slipthedialtoputiton frequency. c.Uitwasnecessaryto sUpthedial,repeatsteps CiathroughClh. d.UstepC2cwasnec

43、essary,repeatstepC2b.It ispossiblethattheentiredialw11lnowtrack withoutfurtheradjustment. e.Check aUnumberedpointsonthedial,beginning atthehigh end.Usomepointsexceedtest limits(:i:2%),trytoequalizetheerrorbysUp- pingthedialtogetailpointswithintheselimits. f.Switch RANGEtoXIOK, andsetthe 200Sfre- que

44、ncydialto60. g. Adjust C7 to put 600kconfrequency. h.Checkcalibrationontheremainingranges. Calibrationshouldbecorrectto 12%. NOTE:Itwill beadvantageoustosetthecounter FUNCTION SELECTORto10PERIODAVERAGE whenmeasuringfrequency ontheXlrange(re- fertotable4-2). SectionIV Paragraph4-7contd e.U600cpsisoff

45、morethan2%.setthefrequency on withC6. NOTE:Sincereplacingthecabinetraisesthe frequency sUghtly,ItIsadvisabletosetthefre- quencyIow(e.g.,599cps)whenmaking thisadjustment. f.Observethe output voltage anddeterminehow muchItdUfersfromthereference. g. AdjustC3tocorrectforhal!thisdifference. ThenadjustC6s

46、othatthe outputfrequencyis again600cps. h.Observetheoutput Voltage.UitIsmorethan :i:t/4dbfromthereferenceinstepCtcrepeat stepsClcthroughClhuntil a flatresponseIs obtained with 600cpsseton frequency(seenote above). Finally,iftheaboveproceduresdonotresultincor- rectcalibration,startoverbyadjustingC3an

47、d/orC6 asinstepCIa throughh.Then worktowardthe low endbysettingthedialtothenextnumberedpointand bending one oftheouterrotorplatesineachsection ofC5atthe point ofmesh.Continuethisprocedure tothelowend of thedialtoobtainapproximatelycor- rectfrequencies.Repeatthe bendingprocedurefrom the high end,this

48、timemakingfineadjustmentsof frequency with theotherouterrotorplates.Inthis way, bending ofanyoneplateisminimized. When bendingrotorplates,observethe followingpre- cautions:(1)Keepallbendsasneartheshaftas possible.(2) KeepallsegmentsIn Hne.Therotor platesshouldtapergraduallyinwardoroutward,de- pendin

49、g onwhetheryoumustcompressorexpandthe 4-400087-3 Model 2005 4-8.TROUBLESHOOTING. ThefollowingIslntendedasa guidetoassistInlo- calizingtroublesthatmayoccurIn the2OOS.Agood way to lo:atetroublesIs to follow thetestprocedure until theproblemappearsasareadingthatdoesnot meetthetestlimit.Thenrefertotable4-4forpos- siblecauses.The follOwingsuggest