HP-777D-Manual-sn-3088 电路图.pdf

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1、HEWLETT,PACKARD DUALDIRECTIONAL COUPLER model 7770 l. Forserials3088 and above OPERATINGNOTE16MAY67 Figure1.Model 777DDirectionalCoupler powerfromsecondaryarmtomainlineinputisspe- cifiedasmeancoupling.Themeancouplingofeach auxiliaryarmisstampedonitsnameplateoppositethe appropriateauxiliaryarm.Thevar

2、iationincoupling iswithin0.4 db ofthemean,andthemeancouplingis within0.5 db of-20db.Inaddition,thevariationin ratioofthetwoauxiliaryarmcouplingfactorsiswith- in0.5 db.CompletespecificationsaregiveninTable1. TheModel 777DisshowninFigure1.Performance checkproceduresaregiveninParagraphs14through19. 3.U

3、sesofthecouplerincludereflectometermeas- urements,simultaneousforwardandreversepower monitoring,andclosedlooplevelingapplications. 4.Eachcouplerissupportedbyfourplasticfeet (StockNo. 0361-0207) onthebottomofthecoupler. Thefeetareinsertsin8-32tappedholesandmaybe removedtomountthecoupler.Lateraldimens

4、ions betweenmountingholesaregiveninFigure2. 1.INTRODUCTION. 2.TheModel 777Disadualdirectionalcoupler.It isdesignedforusein50 - ohmcoaxialsystems.In thiscoupler,couplingattenuation(ratioof output 5.CONNECTORS. 6.AnCompatibletypeNconnectorisusedonthe coupler.Whenthisconnectorismatedwithastandard type

5、Nconnector,onlyslightdiscontinuityshouldexist. Table1.Specifications NETWEIGHT: 1-1/2lb (700 g) SIZE: 8-7/8inx2-1/2inx1-1/8in(225 x 64 x29mm) PRIMARY LINE INSERTION LOSS: Approximately0.6 db PRIMARY LINE CONNECTORS3,: CompatibletypeNconnectors,onemaleandone female SECONDARY LINE CONNECTORS3,: Compat

6、ibletypeNconnectors,female ACCESSORIES AVAILABLE: 11511A Type NFemaleShortingJack 11512ATypeNMaleShortingPlug FREQUENCY RANGE:1900to4000 Mc MINIMUMDIRECTIVITy1:30 db NOMINAL COUPLING ATTENUATION(eachsec- ondaryarm):20db ACCURACYOFCOUPLING(eachsecondaryarm): 0.5 db MAX COUPLING VARIATION(eachsecondar

7、yarm): 0.4 db AUXILIARY ARM TRACKING2: Equaltoorlessthan0.5 db. MAX PRIMARY LINE SWR1:1.2 MAX SECONDARY LINE SWR:1.25 MAXPOWERHANDLING CAPACITY: 50wattsCWor10kwpeak I Nr-.-I o PrintedInU.S.A. 00777.9021,50,PageMillRoad, PaloAlto,California,U.S.A.,Cable:HEWPACKTel:(415)326-7000 oEurope: 54RouteDesAca

8、cias, Geneva,Switzerland,Cable:HEWPACKSATel.(022)42.81.50 RadioFans.CN 收音机爱 好者资料库 Page2Model777D 6.015 SWRMETER o - Ill CJ E)- I e- I 777D -e- I -,- 177D-A- Y-AXIS x-AXIS CRYSTAL DETECTOR Figure5.TypicalReflectometerSetup THISSHORT f-T- i: IL- YTHENTHIS THISI CALIBRATION: ATTENUATORI I II II -.v, f-

9、/ hp777D LOWPASS FILTER displayedon an SWRMeter.Theunknownloadon whichthereflectionmeasurementsarebeingmadeis usedasaterminationonthemainlineoutputofthe coupleroppositetheend fed bytheleveledsweep oscillator. SWEEP OSCILLATOR SIPAle0 Rff-l CALIBRATION LINES 1770-A-. -TESTTRACE Figure3.TypicalRecorde

10、rPlot Figure2.LateralDimensionsof TappedMountingHoles 8.REFLECTOMETERAPPLICATION. 9.Figure5illustratesatypicalsetupformaking reflectometermeasurements.Theforwardoutputof thecouplerisusedforlevelingthesweeposcillator. Anyvariationsinthedetectedforward-waveoutput areproportionaltothesweptfrequencyoutp

11、utlevel variationsand whenappliedtoasweeposcillator,such astheCf;Model 692A,thesevariationsareamplified toproduceanegativecontrolvoltagewhichisusedto maintainaleveledRFoutput. 10.Theoutputofthereversearmwhichispropor- tionalto thereflectionsfromthedeviceundertestis 11.EQUIPMENTCONSIDERATIONS.Therj;M

12、odel 423ACrystalDetectorsaresuitableforuseasthe 0.064MIN. 0.0655MAX.L-= A 0.314MIN. 0.316MAX. I 0.316MIN. 0.320MAX. 0.063MIN. Jtj:=0.066MAX. eOTA-A-II lDL.:r. ALLDIMENSIONSININCHES Figure4.Dimensionsof hpCompatibleTypeNConnectors 02114-4 RadioFans.CN 收音机爱 好者资料库 Model 777DPage3 SWRMETER o X-VRECORDER

13、 a.Set uptestequipmentasshown inFigure6. Note SWRMeterand SweepOscillatorshould not beconnectedtocommongrounds. b.SetSweepOscillatorforasquare-wavemodu- lated2. O-GcsinglefrequencyRFoutput. c.WithCrystalDetectorAttenuatorconnectedto DirectionalDetectoroutput,setRFoutputlevelfora referencesettingof 0

14、 onthe30dB-NORMALscaleof theSWRMeter.Check 423 outputtoassure5 mV peak-to-peakoutput.- d.DisconnectCrystalDetectorattenuatorandat- tachtosecondaryarmof777D.Connect 777Dmain lineconnectortoDirectionalDetectoroutput. e.SwitchSWRMeterrangeswitchdown 20 dB and recordatrace.(SeeFigure3) COUPLING ATTENUAT

15、ION:Max20.5db Min19.5db ActualReading(2.0Gc) 2008 ATTENUATOR 1 I I I DTHEN .THIS THIL r-L-,:nc=:=JcT =:-IIp777DTEI NATION Y-AXIS If SWEEPOSCILLATOR SIPAle0 ml1.-LOWPAC-=S-isII FILTER X-AXIS ActualReadings: (2.6Gc), (3.2Gc), (3.8Gc), Figure6.Coupling Check detectors.AnModel 415ESWRMeter,Model 140AOsc

16、illoscope,orModel130B/COscilloscope issuitableforuseasthecalibrateddisplayinstru- ment.Ifapermanentrecordofthemeasurementsis required,theMoseley Model 7035X-YRecorderis suitableforusewith theSWRMeter. 12.Formoreinformationonreflectometersystems, refertoHewlett-PackardApplication Note 65,copies of wh

17、ichmaybeobtainedfromyourlocalfieldoffice uponrequest. 13.PERFORMANCE CHECKS. 14.Testequipmentrecommendedforusein checking specificationsofthecouplerislistedinTable2. Equipmentwhosecharacteristicsareequaltoor betterthanthecriticalspecificationslistedmaybe substitutedfortheequipmentlisted. 15. MECHANI

18、CAL INSPECTION.Mechanicalinspec- tionshouldincludeperiodicmechanicaldimension checkson theconnector(refertoFigure4forimpor- tantdimensions).Also, anyaccumulateddustanddirt shouldberemovedfromthecouplerconnectors. 16. ELECTRICAL INSPECTION.Electricalinspec- tionofthecouplershould includedirectivityan

19、dcou- plingchecksand optionallytheSWRcheck.(The directivityandSWRcharacteristicsofthecouplerare toadegree,interdependentcharacteristicsand a satisfactorydirectivitycheckshouldindicatesatis- factorycouplerSWR. ) 17. COUPLING CHECK. COUPLING ATTENUATION:20O.5 db MAXIMUM COUPLING VARIATION:0.4db 02114-

20、4 f.Disconnect777Dfromattenuator.Gobackto andrecordcalibratinglinesin0.2dBincrements, settingSWRMeterto 2GHz andthensweeping2-4GHz: Note 777meancoupling and couplingvariation. COUPLING ATTENUATION: Max20.5db Min19.5db (2.2Gc),(2.4Gc), (2.8Gc),(3.0Gc), (3.4Gc),(3.6Gc), (4.0Gc),(Gc), MAXCOUPLING VARIA

21、TION:Maximumvari ationbetween any oftheactualcouplingatten uationmeasurementsmaynotvarybymore than0.8db. 18. DffiECTIVITY CHECK. MINIMUM DffiECTIVITY: 30 db a.SetupequipmentasshowninFigure6 with 10 dB Attenuatorconnectedbetween423Aand 777D,and 777D terminatedinanopen-circuit. Note Thesignalsourceand

22、theSWRMetershould notbeconnectedtocommonground. Connect signalsourcetopowerlineground andisolate SWRMeter. b.Set SweepOscillatorforleveled,square-wave modulatedRFoutput.Check 423A output andsetto :s:5 mVpeak-to-peak. c.Set O-dBreferenceonSW_RMeterasaveragein- dicationbetweenopen-andshort-circuitatan

23、yfre- quencyintheband. Note TheO-dBreferencesettingassumestotalat- tenuatorattenuationtobe10 dB;ifthetotal attenuationismoreorlessthan10 dB,the SWRMeterreferencesettingshouldbeoffset sothattheO-dBreferencerepresents0 dB whenpadisremoved. RadioFans.CN 收音机爱 好者资料库 Page4 SWRMETER a Y-AXIS INSERT100B ATT

24、fNUATORHERE TOCALIBRATE SIP REfAlC THISSHORT f-T-G -1I II IL-(OPEN :THEN (THIS _iVQJ SLIDING LOAD FigureI.DirectivityCheck d.Remove10dBAttenuatorfromsetupandconnect slidingloadtocoupler.Increase415gainby20dB. e.SetSweepOscillatorfor100-secondsweeprate. f.ContinuouslyphaseSlidingLoadandnoteSWR Meterm

25、inimumandmaximumindications.Ifboththe minimumandmaximumindicationsaregreaterthan theO-dbreferencethecouplermeetsthedirectivity specification(30 db). DIRECTIVITY: Atleast30 db. SWRMeterindi- cationshouldnotexceed0 DB on highendof scale.Ifanypointsarequestionableproceed tonextstep. Model 777D (6)Repea

26、tminimumandmaximummeasurements andtheabove fivesteps.Oneofthecorrected minimumreadings(step4)willagreewithone ofthecorrectedminimumreadingswithinafew tenthsof a db whentheaboveprocedureisre- peated.ThisreadingistheSlidingLoadreturn loss.Theothercorrectedminimumreading willrepresentthedirectivityofth

27、e 777Dplus amismatcherrorbetweenthecouplerand the load.Theonlyvalueofthisreadingistoin- dicatewhich ofthefirstsetofcorrectedmin- imumreadingvaluesisthe777Ddirectivity. h.Thefollowingisanactualsinglefrequency777D directivitymeasurementmadefollowingstepsof Paragraph18g: (1)TheminimumSWRMeterreadingwas

28、2.5 db and themaximumSWRMeterreadingwas7.4db; 30 db +2.5db=32.5db(minimumreading) 30 db +7.4db=37.4db(maximumreading). (2)37.4-32.5=4.9db. (3)ReferringtoFigure7,thetwocorrectionfac- torsare2.1and13.3db. (4) Addingminimumreadingtoeachcorrectionre- sultedinthefollowingcorrectedminimum readings: 32.5db

29、 +2.1db=34.6db and 32.5db +13.3db=45.8db. (5)SlidingLoadloosenedslightlyanddrawnaway from777D. (6)Theaboveprocedurewhenrepeatedresultedin thefollowing: (a) SWRMeterreadings:+7.5dband O.Odb(or 27.5and30.0db). (b)Subtractedreadings:30.0=27.5=2.5db. (c)CorrectionfactorsfromFigure7:1.2db and18.0db. (d)C

30、orrectionfactorsaddedtominimum: 27.5+1.2=28.7db and27.5+18.0=45.5db (2)Subtractminimumreadingfrommaximum g.Todetermineactualdirectivitymakesinglefre- quencymeasurementsusingtheaboveprocedureand thefollowingprocedure: (1)Add 30 db totheminimumandmaximumSWR Meterreadings;30-db+db 30-db+db reading;db (

31、e)Thepreviouscorrectedminimumreadings were34.6and45.8db.The45.5and45.8db readingswereknowntorepresenttheSliding Loadreturnlosssincethemismatchconnection introducedbetweenthecouplerandtheloadhad noappreciableeffect.However,the28.7and 34.6dbreadingsindicatedthemismatcheffect ofthemismatchconnection.Th

32、erefore,the 34.6dbreadingisknown torepresentthedirec- tivityof the 777Dundermeasurement. (3)RefertoFigure7 anddeterminetwocorrection factors;correctionfactors=and (4) Addminimumreadingtoeachcorrectionfactor sar;+ db +db. (5)LoosenSlidingLoadcenterconductorlockand, beingcarefulnottorotatecenterconduc

33、tor, slightlyloosenconnectionto 777D. 19. SWR CHECK. MAXIMUMMAINLINE SWR:1.2:1 a.SetupequipmentasshowninFigure9. Note TheSweepOscillatorandthe SWRMeter shouldnotbeconnectedtocommonground. b.SetSweepOscillatorfora1000-cpssquare-wave modulatedsinglefrequencyRFoutput. 02114-4 Model 777D 16 12 10 CZl o

34、!oJ8 u Z !oJ a: !oJ 6 o 2 o Page5 Figure8.SignalSeparationChart SWEEP OSCILLATOR ALe II LOWPASS FILTER SLOTTED LINE Figure9.SWRCheck 02114-4 SWRMETER o SLIDING LOAD 1710-A- c.Set any convenientreferenceon SWRMeter40- db NORMALscale. d.SlideSlottedLinecarriagetoaminimumSWR- scaleindicationasnearthece

35、nterof theslottedsec- tionaspossible. e.PhasetheSlidingLoadtoobtain amaximum SWR-scaleindication. f.SwitchSWRMetertoEXPANDscaleandseta 1.0indicationonSWRscale. g.SlideSlottedLinetoamaximumSWR-scalein- dicationandphaseSlidingLoadforaminimumread- ing.Recordreading. h. Remove 777DfromsetupandconnectSli

36、ding LoadtoSlottedLineusingappropriateconnectoron SlidingLoad.MeasureandrecordSWRofSlottedLine. 1.Dividereadingobtained instephby1.2(thecou- pIerSWRspecification).Thereadingofstepgmust notexceedthisquotientwhichaccountsformeas- urementambiguityduetoSlottedLineresidualSWR. Page6 Table2.RecommendedTes

37、tEquipment Mode1777D InstrumentTypeCriticalSpecificationsCheckModel Low-PassFilterFrequencyCutoff:2.2GHzAllcFj)360C(2.2GHz 4.1GHzcFj)360D(4.1 Rejection:40 db SweepOscillatorFrequency:2 - 4 GHzAllcFj)692A/B PowerOutput: 3 mwminimum or LeveledOutputCapability:0.3db cFj)8692A/B ResidualFM:Lessthan30kcp

38、eak SWRMeterFrequency:1000cps2%AllcFj)415E Calibration:Squarelaw or Accuracy:O.2 db 5iJ415B Sensitivity:0.1IJ.V LowPowerFrequency:1.9- 4 GHzAllcFj)908A TerminationSWR:1.05 PowerCapacity:1/2W Required:2 FixedAttenuatorAttenuation: 10 dbAll(10-db)cFj)8491A Opt 10 FrequencyRange:1.9- 4 GHzWeinschel1-10

39、 ShortingPlug&JackTypeNmaleplug&NFemaleJackDirectivity cFj)11511A and diitJ11512A DirectionalCouplerFrequencyRange:1.9- 4 GHzDirectivitycFj)787D andFrequencyResponse:O.2 db CrystalDetectorSensitivity:4 IJ.v/IJ.wCW SlidingLoadFrequency:1.9 - 4 GHzDirectivity 906Aor SWR907A SlottedLineFrequency:1.9- 4

40、 GHzSWR805C SWR:1.04 Output:Detected MainLineConnectors: StandardTypeN CrystalDetectorFrequency:1.9- 4 GHzCoupling(1)cFj)423A FrequencyResponse:0.5Directivity(2) SquareLawTracking: O.5 dbforpowerlevels upto 50mv 02114-4 Model 777DPage7 Table3.ReferenceDesignation Index eference Desttion stockNo. 125

41、0-0909 1250-0909 1250-0909 1250-0816 08740-2100 5020-3296 1460-0297 5020-3297 5020-3298 08491-6000 Description* 8 7 4 3 Figure15.ConnectorAssembly COLINGSLEEVE COUPLINGNUTCONNECTORASSYAPC-7 OUTERCONDUCTOR INNERCONDUCTOR,CONTACTMECHNISU SUPPORTBEAD CENTERCONDUCTOR SPRING CONTACT CARTRIDGEADAPTER CART

42、RIDGEASSEMBLY100B 9 1140A-A-7 Note 02114-4 FIGURE15CONNECTOR.CARTRIDGEASSEMBLY #Seelist ofabbreviationsinintroductiontothissection MANUALCHANGES MODEL 777D DUAL DIRECTIONALCOUPLER OperatingNoteSerials3088andabove PrintedMay16,1967 MAKEALLCORRECTIONSINTHISMANUALACCOROINGTOERRATABELOW.THENCHECKTHEFOLL

43、OWINGTABLEFORYOUR INSTRUMENTSERIALPREFIX(3DIGITS)ORSERIALNUMBER(8DIGITS)ANDMAKEANYLISTEDCHANGEIS)INTHEMANUAL. NEWITEM. SERIALPREFIXORNUMBERMAKEMANUALCHANGESSERIALPREFIXORNUMBERMAKEMANUALCHANGES 3088 andaboveERRATA 04875andaboveChange1&Change 2 ERRATA:Pa.ge1.Table1.ChangeSpecificationstoread: FREQUEN

44、CY RANGE:1.9to4.0GHz CHANGE1:Page1,Table1. ChangeSpecificationstoread: MAX SECONDARY LINESWR:1.3 CHANGE2: 6January69 Page7,Table3. Disregardthisinformation. SupplementAfor 00777-902 PRINTEDINU IA ADDENDUMSHEET CONNECTORS Hewlett-Packardisin theprocessofchangingovertheprecisionType Nconnectorsusedonp

45、revious instrumentsofthismodelto a typecompatiblewith the new MIL- C- 39012specification.Oneormore oftheconnectorsonthisinstrumentareof thlb new type.Theseconnectorscanbeidentifiedasfollows: ) MALE FEMALE LABEL -Noslotsin themaleouterconductor. -Gold-platedinnerconductor(except788789) MateswithMIL-C

46、-39012Connectors ThesenewconnectorsarecompatiblewithMIL-C-71Bconnectors.also.HowevertheyareOT compatiblewith theHewlett-PackardprecisionmaleTypeconnectors. CAUTION Do NOTattempttomatethesenewconnectorswiththeHewlett- PackardprecisionmaleTypeNconnectorsasthecenter conductorwillbedamageddue totheforce

47、dfit.Usean adaptermadeofstandardType Nconnectorswiththis precisionconnector. Becauseof theclosecoupling ofinnerconductorsallconnectorsshouldbecheckedforcontact separationtopreventdamagetotheequipment.Agaugesetforthismeasurementisavailablefrom Hewlett-Packardunderpartnumber00805-602. B. 0.063MIN. 0.066MAX. 1 A .0.207MIN. 0.207MAX. ServiceNote 774D-1.obtainablefromyournearestHewlett-Packardfieldoffice.detailswhatcon- nectorsareon whatinstruments.how torecognizeandormeasuretheconnectors,whichconnectors matewith which.measuringtools.etc. 16Jan67