Hammarlund_SP-600-JX-21_user_TO31R2-4-101-1_1956.pdf

.-*-;r 1.0.31R2-4-10l-1 HANDBOOK OPERATION INSTRUCTIONS RADIORECEIVER MODElSP600JX21 (HAMMARLUND) LATESTCHANGED PAGES SUPERSEDE THESAME PAGES OF PREVIOUSDATE Insertchangedpagesinto basic publication.Destroysupersededpages. AirForceOC,15Jul65-500-Reprinr BASIC ANDALLCHANGES HAVEBEENMERGEDTOMAKE THIS ACOMPLETEPUBLICATION. PUBLISHEDUNDERAUTHORITYOFTHESECRETARYOFTHEAIRFORCE _*-31 15DECEMBER 1955( CHANGED 1 AUGUST1956- T.O.31R2-4-101-1 Reproductionfornon-militaryuseoftheinformationorillustrations contained in thispub- licationisnot permittedwithoutspecificapprovaloftheissuing service (BuAerorUSAF). ThepolicyforuseofClassified PublicationsisestablishedfortheAirForce inAFR205-1 andfortheNavyinNavyRegulations,Article1509. ;-LISTOF REVISED PAGES ISSUED-. INSERTLATESTREVISED PAGES. DESTROYSUPERSEDEDPAGES. NOTE:Theportionofthetextaffected by thecurrentrevision isindicatedby averticallineintheoutermarginsofthepage. Page No. DateofLatest Revision i 21 22 1August 1August 1August 1956 1956 1956 *Theasteriskindicatespagesrevised,addedordeletedbythecurrentrevision. ADDITIONALCOPIESOFTHISPUBLICATIONMAYBEOBTAINEDASFOLLOWS: USAFACTIVITIES.-InaccordancewithTechnicalOrderNo.00-5-2. NAVYACTIVITIES.-ubmitrequestton.earestsupplypointlistedbelow,usingform.NavAer:140:NASD,Philadelphia,Pa.; .NAS,Alameda,Callf.;NAS,Jacksonville,Fla.;NAS,Norfolk,Va.;NAS,SanDIego,Callf.;NAS,Seattle,Wash.;ASD, NSC,Guam. ForlistingofavailablematerialanddetailsofdistributionseeNavalAeronauticsPublicationsIndexNavAer00-500. USAF ARevised1August1956 T.O.31R2-4-101-1TableofContents TABLEOF CONTENTS SectionPage IDESCRIPTION 1-1.General 1 1 1-3.PurposeofEquipment1 1-11.DescriptionofEquipment1 1-26.OperationalTheory.4 1-31.CapabilitiesandLimitations.5 1-36.EquipmentRequiredforPhoneorSlow-speedTelegraph Reception .6 7 7 7 7 7 10 13 Uncrating. Inspection. ReplacementofDefectiveParts SettingUpthe Receiver 2-3. 2-5. 2-8. 2-12.Installation 2-19.Testing IIPREPARATIONFORUSE 2-1. IIIOPERATION 3-1. 3-3. 3-22. 3-25. 3-54. 3-57. General DescriptionofControls. PresentationsandReadings. OperatingProcedures . De-energizing theEquipment PrecautionsToBe Observed 14 14 14 16 17 21 21 IVEMERGENCYOPERATION 4-3.AntennaSystem 4-1. 4-5. General EmergencyTubeReplacement .22 .22 22 22 Revised1August1956 Section ii T.O.31R2-4-101-1 FigureJ-1.RadioReceiver,ModelSP-600-JX-2J T.O.31R2-4-101-1 SECTION I DESCRIPTION Section I Paragraphs1-1to1-15 1-1.GENERAL. 1-2.Thishandbookcontainsoperationinstructionsfor RadioReceiver,Mod!.!SP-600-JX-21,(figure1-1) manufacturedby theHRmmarlundManufacturingCo., Ine.,NewYork1,N.Y. 1-3.PURPOSE OF EQUIPMENT. 1-4.Theradioreceiverisdesignedforenclosed- station, fixedormobile use.Itisadaptableto shipboard, airborne,orfield applications,andmay be usedina two-wayoperationalactivity.Theradioreceiver provides forthe receptionofkeyed, amplitude-modulated,and frequency-shift carrier signals.Thecarrier signal intelli- gencemaybeslow-speed(manual)orhigh-speed (automatic)telegraph,phone,teletype, facsimile, ete. ForMorse codeandteletypeoperation,use ismadeof cowandsingle-tone carrier signals.Forteletype opera- tion, two-toneandfrequency-shift carrier signals may also be used. 1-5.Torenderthe signal intelligence audibleand/or recordable, auxiliarycomponentsare required.Whenthe receiver is to be usedforthe receptionofphoneor slow-speedtelegraphsignals, a headsetand/orloud- speaker are used;inothermodesofoperation,these componentsare usedtomonitorthe signal.Toreceive high-speedtelegraphsignals, a recorderdrivingunitand lora tape ink recorder are required.Forfrequency- shiftteletype reception, use ismadeofsuitable frequency- shiftconverterequipmentassociatedwitha teletype- writer. 1-6.Theoutputofthe receiver,forsignalsotherthan phone,may be developedintheformofdocoutputto denoteadot(mark)andnodocoutputto denote a dash (space),the signal intelligencebeingcontainedinthe successionofdotsanddashes. Alternately,itmay be developedintheformofa-coutputwherein,forthe in- tervalofeachdot(mark),orforthe intervalofeach dot(mark)andeach dash (space), keyed-tone signals result.Thesignalintheformofdocoutputis suitable tooperateapplicablerecordingequipmentsuch as atape inkrecorder, a line relay,ora tonegenerator.Thesignal in theformofa-coutputprovides the audibleoutputof the system;oritis usedtooperatearecorderdriving unitassociatedwiththe tapeinkrecorder,ortoprovide inputtoa suitable frequency-shiftconverterassociated witha teletypewriter. 1-7.Thetonegeneratorkeyedoutputmay be used toprovidethesignal to the headsetand/orloudspeaker monitor.Itmay also be fedtoa transmission linetopro- vide the signalattheremoteendofthe line.Thekeyed- toneused is inthevoice frequency range, each signal requiringa frequencybandof170 cycles,andthe line may be usedforseveral such tone signals, as well asfor phonesignals. 1-8.Theradioreceiver provides for continuously vari- able receptionwithinthe frequencyrangeof0.54 mcto 54.0 mc,andforcrystal-controlled fixed-frequency re- ceptionwithinthe frequencyrangeof0.75 mcto54.0 me.Thereceiver uses single heterodyne conversionfor its three lower frequency bandsanddoubleheterodyne conversionforits threehigherbands(above7.4mc). Thereceiver signal-to-noise ratioandsensitivity charac- teristicsprovideforthe receptionofextremely weak signalsandthe receiver is well suitedforthe reception ofshort-wave signals which areinherentlysubjectto nonselectiveandselective fading. 1-9.Theradioreceiver has aninternalbeat-frequency oscillator used in heterodyne detectionofkeyed-carrier signals toprovideaudiosignal intelligence to the head- setand/orloudspeakermonitor. 1-10.Theradioreceiver has a self-containedpowersup- ply designedtooperatefroma 50-cps to 60-cps, single- phase a-c sourcewithinthevoltagerangeof90to270 volts.Thereceiverpowerconsumptionis 130 watts. Thepowertransformerprimaryandsecondary are sepa- rately fused.The1.6-ampere slow-blowprimaryfuse, andthe o/g-ampere high-voltage secondary fuse are con- tainedincartridge-type fuseholders locatedontherear apronofthe receiver. 1-11.DESCRIPTION OF EQUIPMENT. 1-12.GENERAL.Theradioreceiver is a 20-tube radio- communications type designedfordirectmountingin astandard19-inch relay rack.Itcomprises a chassisand lightgrey front-panel assemblytowhich aremounteda topcoverandabottomplate. 1-13.RECEIVERCONNECTORUSES.Withtheex- ceptionoftheheadsetPHONESjack (20, figure3-1), locatedonthefrontpanel,andtheANTinputcon- nector (8, figure2-1),all receiver connectorsandtermi- nals are locatedontherearapron.Thea-cpowercable ofthereceiver is also locatedontherearapron. 1-14.There-:eiverinputcircuit is designedtoaccommo- datea balanceddoubletorstraight-wireantenna.The inputimpedanceofthereceiver is designedtomatch a 95-ohm transmission line.Othersuitableantennain- stallations specifically designedforthe desiredoperating frequency may also be used.Theantennais connectedto the receiverANTinputconnector (8, figure2-1) withtypeRG-22/Ucable. 1-15.TheIFOUTPUTconnector(6, figure2-2) provides a received signal (usually frequency-shift)at thereceiver i-foutputforfrequency-shiftconverteruse, usually aspartofa space-diversity receiving system.The i-foutputcircuitinthereceiver is isolatedfromthe b-f-o circuits,thereforeb-f-o injectionvoltageisnot availableattheIFOUTPUTconnector. 1 Section I Paragraphs1-16to1-23 T.O. 31R2-4-101-1 1-16.ThereveiverAUDIOOUTPUTterminals (8, figure2-2)are suitedfora 600-ohm loudspeakeror transmission line.Thereceiver a-c signaloutput(phone, single-tone telegraphorteletype,ortwo-tone teletype) is availableattheAUDIOOUTPUTterminals.To renderhigh-speed telegraphandsingle-toneortwo- tone signals intelligible, the tapeinkrecorder usedfor high-speedtelegraphandthe teletypewriter usedfor teletype reception are associatedwithdemodulatorequip- ment connectedtothe receiver by suitable transmission line.Whena local teletypewriter is used tooperate anotherteletypewriter remotelyorlocally connected to the transmission line, the send teletypewriter relay is connected to thejumperedAUDIOOUTPUTtermi- nals sothatthe linecurrentonmarkbalancesout between the balanced splitoutputtransformerwindings ofthe receiver, for which thejumperedconnection pro- vides amid-pointtap.Thisuseofthe line may be simultaneous to itsotheruses. 1-17.ThereceiverDIODEOUTPUTterminals (2,figure2-2)andtheAVCterminals(3) areusedtointerconnecttworeceiversinaspace- diversity receiving system.TheAVCterminal desig- natedGisgroundedforeach receivertoacommon groundwhilethatdesignated-isinterconnected between receivers.Thisisdonetoprovidecommonavc between receiversforspace-diversity receptionofan amplitude-modulatedorfrequency-shiftsignal.With thisarrangement,the avc duetothestrongersignal re- ceivedonone receiver decreasestheweaker signaland thenoiseoutputoftheother.Toprovideforspace- diversity receptionofphone,theaudiooutputfromonly onereceiver is used.Todo this,thejumperedDIODE OUTPUTterminalsareopenedonone receiverand the-terminalconnectedtotheotherreceiver, which providestheoutput.Toprovideforspace-diversity re- ceptionofcwtoatonekeyer(generator)ortapeink recorder, the receiver interconnections are asoutlined forphone,butnoavcandnobfoare used.Thisis the casewhenthedocoutputfromthe three interconnected DIODEOUTPUTterminals is used.Whenthea-c outputis used, the diversitydemodulator,associated withthetapeinkrecorder, isprovidedwiththea-c outputfromtheAUDIOOUTPUTterminals(8)of each receiver.Toprovideforthe space-diversity recep- tionoffrequency-shiftcarriersignals,thei-foutput orthe audiooutputfromeach receiver may be used to provideinputtosuitablefrequency-shiftconverterequip- ment. 1-18.TheACpowerreceptacle (12, figure2-2)on therearapronofthereceiver may be usedforoperating an accessory, such as an electric clockorlamp.Poweris availableatthereceptaclewheneverthereceiver is con- nected to apowersource, regardlessofthe settingsofthe receiver controls. 1-19.RECEIVEROPERATION.Alloperationalac- tivities requirethatthe receiver switchesandcontrols be setproperlyforthemodeofoperationcontemplated. Thesecontrols are all locatedonthefrontpanelofthe 2 receiver,withtheexceptionoftheMETERADRF control(5,figure2-2)andtheMETERADAF control(7)used to calibratethetuningmeter(1,figure 3-1)onthefrontpanel,andtheBFOINadjustment control(4, figure2-2),all threeofwhich are located ontherearapronofthereceiver.Thesecontrols are factory adjusted,andarenottobemovedfromtheir adjustmentpositions. 1-20.Theradioreceiver isadaptabletoa two-way oper- ationalactivitythroughuseoftheSEND/RECswitch (21, figure3-1).WiththereceiverRFGAINcontrol (11)turnedclockwisefromitsOFFposition,when the a-c sourceisconnectedtothereceiver, a-cpoweris appliedforeitherpositionoftheSEND/RECswitch. Whenthe switch isinitsSENDposition,thereceiver is disabledforprotectioninthe presenceofastronglocal carriersuch asthatproducedby local tranmissionduring a two-way communication activity.Whentheswitch is inits RECposition, the receiver providesforinstant reception. 1-21.WhentheradioreceiverFREQCONTROL slectorswitch ;8, figure3-1)is settotheVFOposi- tlOn, theTUNINGcontrol(15)provides continuously variabletuningofany desiredcarrierwithinthefre- quencybandselected by theBANDCHANGEswitch (17).WhentheFREQCONTROLselector switch is sttooneoftheXTALSpositions,thereceiverpro- videsforfixed-frequency crystal-controlled receptionof any signalwithinthefrequencyrangeof0.75 mcto54.0 mc,providedthatthepropercrystal has been inserted intothenumberedcrystal socketcorrespondingtothe selected switch position.TheBANDCHANGEswitch functionsasbefore,andtheTUNINGcontrolis usedtoadjustthe r-f amplifier circuits totheoperating frequency. Exacttuningofthe crystal-controlled first heterodyne oscillator isprovidedby the6.FREQ control(7).TheTUNINGLOCK(14),whenturned clockwise, providesoptionallocking meansforthe ver- nierdial(6),themaintuningdial(4),andthetuning mechanism, topreventaccidentaldetuningofthere- ceiverduetovibrationoraccidentalshiftofthe con- trols.TheTUNINGcontrolitself remains freeto turnevenwhentheTUNINGLOCKislocked. 1-22.ThereceiverSELECTIVITYswitch (22, fig- ure3-1)providesa choiceofsix degreesofbandwidth orselectivity.Theswitchpositionchosen isthatwhich providesoptimumreceiverperformanceforthe existing qualityofthereceived signal.Whenthe switch isinone ofitsXTALpositions, theXTALPHASINGcon- trol(23)is used tohighlyattenuateanyinterfering signal, evenwhenitis closely adjacenttothedesired signal.ThereceiverLIMITER/OFFswitch(19)inits LIMITERpositionprovidesforeffectivelyreducing ignitionnoiseandotherpulse-type noisefromthere- ceiveraudiooutput. 1-23.ThereceiverMOD/CWswitch(13,figure 3-1)in itsCWpositionrendersthebfooperative.The BEATOSC.control(10)provides the meansofad- justingthe toneoutputwithina frequencyrangeof3 w3.5MC CRYSTAL OSCILLATOR XTALSVFO FREQ CONTROL . VG S.le, uf-o. GATEt- LOUDSPEAKER AMPLlF o - - -l ? Co) -;:lll . ,Ill. I - !4- POWER SUPPLY 1-+ BEAT L.jFREQUENCY OSCILLATOR 1-FHDETECTOR AMPLIFIERSAVC CRYSTAL FILTER is f-( , MIXER +-C;1f O)/ ,?J vr A MIXER l-.-IR-Fl.c AMPLIFIERSr-1 A-C- SOURCE -SIGNALPATHFORFREQUENCIES ABOVE7.4MC , , , , , SIGNALPATHFORFREQUENCIES BELOW7.4MC CRYSTAL CONTROLLED OSCILLATOR VARIABLE FREQUENCY OSCILLATOR w figurei-2.Radio Receiver,SimplifiedBlock Diagram VI (1) n - o Section I Paragraphs1-24to1-29 T.O. 31R2-4-101-1 kc.TheBEATOSc.controlmay beturnedineither directiononscale toprovidethe 3-kcrangeforthe re- ceivedcowsignal.WhentheMOD/CWswitch isin theMODposition, the receiver providesforthe recep- tionofamplitude-modulatedsignals.Whenthereceiver is to be usedforthe receptionofa frequency-shift sig- nal,theMOD/CWswitchpositionisdependentupon whetherthe receiver i-foutputorthe receiver a-foutput istobe furnishedtothe associated frequency-shift con- verterequipment.Whenthe receiver i-foutputis used, the useofthebfoprovidesoptionalreceiveroutputfor monitoringpurposes.Whenthe receiver a-foutputis used,thebfomustbeinoperation.Whenthe receiver istoprovidesuppressed-carrier(singleordoubleside- band)reception, thebfois usedtoreinsert thecarrier atthe receiver.Forthis application, theBEATOSc. controlissetto apositionprovidinga bfo frequencyof 455 ke. 1-24.ThereceiverRFGAINcontrol(11,figure 3-1)is adjustable to compensateforwidevariations encountered in the levelofany carrier received.To maintain the receiver a-foutputconstantwithinnarrow limitsfortheRFGAINcontrolsettingchosen, the receiver incorporates automatic volume control.There- ceiverAYC/MANswitch(12),whensettothe AYCposition, provides this action. Provisions are in- cludedinthe receiverfora-v-coperationevenduring thereceptionofslow-speedtelegraphsignals.The RFGAINcontrolis effective in either positionof theAYC/MANswitch. 1-25.Thereceivertuningmeter (1, figure3-1)pro- vides atuningindicationforthe desired signal,when theAYC/MANswitch(12)isset to theAYC position.WhentheRFGAINcontrol(11)is set toits maximum clockwise setting, the metertopscale indication is