OPERATOR’S MANUAL - The Repeater Builder's …

1 ITM 11-5820-I 048-110 DEPARTMENT OF THE ARMYOPERATOR S MANUAL PMCSlOPERATION RADIO SET AN/PRC-127(NSN 5820-01-266-5964)1 JANUARY 1991 Distribution authorized to the Department of Defense andDOD contractors only for official use or for administrativeor operational determination was made on1 January 1891. Other requests for this document will bereferred to Commander, US Army Communications-ElectronicsCommand and Fort Monmouth, ATTN: AMSEL-LC-LM-LT, FortMonmouth, NJ NOTICE- Destroy by any method that willprevent disclosure of contents or reconstruction of can explode if exposed to extreme heat. Donot store battery packs with other hazardous in a cool [less than 130 F (54 C)], dry, well-ventilated area to prevent injury to personnel ordamage to contain corrosive material that can causeinjury to personnel. Do not crush, puncture, mutilate,or disassemble battery not dispose of alkaline batteries in fire.

2 Do notrecharge batteries, put in backwards, or mix with usedor other battery types. Alkaline batteries may explode,leak, and cause injury to personnel or damage blank)*TM 1 l-5820-1048-10 TECHNICAL MANUALH eadquarters,Department of the ArmyNO. 11-5820-1048-10 Washington, DC, 1 January 1991 operator s ManualRADIO SET AN/PRC-127(NSN 5820-01-266-5964)REPORTING ERRORS ANDRECOMMENDING IMPROVEMENTSYou can help improve this MANUAL . If you findany mistakes or if you know of a way to improvethe procedures, please let us know. Mail yourletter or DA Form 2028 (Recommended Changesto Publications and Blank Forms) direct toCommander, US Army Communications-Electronics Command and Fort Monmouth,ATTN: AMSEL-LC-LM-LT, Fort Monmouth, NewJersey 077034000. A reply will be furnished toyou.*This MANUAL supersedes TM 1 l-5820-1048-10,dated 1 February 1990, which shall be destroyed inaccordance with applicable security TO USE THIS MANUAL .

3 ViCHAPTER 1 INTRODUCTIONS ection Information .. 1-11-1 Scope..1-1l-2 Maintenance Forms,Records, and Reports .. 1-2l-3 Reporting EquipmentImprovement Recom-mendations (El Rs) .. 1-21-4 Warranty Information .. 1-3l-5 Nomenclature Cross-Reference List . , .. 1-3 Section II.,Equipment Description.. l ..1-41-6 Purpose and Use of RadioSet AN/PRC-127 .. 1-4l-7 Location and Descriptionof Major Components .. 1-51-8R/T Unit and BatteryPack Data.. l .. 17l-9 Battery Charger Data ..1-8 PageSection 2 OPERATING INSTRUCTIONSS ection and Proceduresl ..*2-9 Technical Principlesof Operation.. 1594 AS-3960 0 Battery 1 Speaker/Microphone and Use ofOperator s Controlsand Indicators..2-1 Preventive MaintenanceChecks and Services ..2-8 PageSection Under UsualConditionsI.

4 2-1325-2-62-72-82-92-102-112-12 Assembly and Preparationfor Use..*..2-13 Battery Pack Installation/Removal..*..*..2-14 Alkaline BatteriesInstallat ion/Removal..2-17 Speaker/MicrophoneInstallation/Removal.. 2-2 1 Antenna Installation/Removal..2-22 Door Cover Installation/Removal.. *..2-23 Normal Operation ..2-25 Battery Charger Operation ..2-26 Section Under UnusualConditions..*..2-28IV2-13 Operation at LowTemperature..2-282-14 Operation at HighTemperatures..2-282-15 Operation in TropicalClimates..2-292-16 Operation During Jamming ..2-29 PageCHAPTER 3 MAINTENANCE INSTRUCTIONSS ection Instructions ..3-1II. TroubleshootingProcedures..3-1 Ill. MaintenanceProceduresl ..*..*..*3-1 APPENDIX ..*..A-lAPPENDIX B. COMPONENTS OF ENDITEM AND BASIC ISSUEITEMS LIST..*..*..B-1 APPENDIX C. ADDITIONAL AUTHORI-ZATION LIST (Not applicable)APPENDIX D. EXPENDABLE/DURABLESUPPLIES AND MATERIALSLIST.

5 D-lHOW TO USE THIS MANUALThis is a quick reference MANUAL that has beenwritten just for you. Become familiar with itscontents so that you will be able to find what youneed MANUAL will show you how to:o OPERATEo MAINTAINYOUR RADIO SET AN/PRC-127It is small enough to fit in your pocket so you canalways have it ready for quick reference. Afteryou have had some time to use it, take a momentto let us know what you think about 1 INTRODUCTIONS ection INFORMATIONRADIO SETAN/PRC-127l-l : SCOPEThis MANUAL tells the user how tooperate Radio Set MAINTENANCE FORMS, RECORDS, of Maintenance and UnsatisfactoryEquipment. Department of the Army forms andprocedures used for equipment maintenance will bethose prescribed by DA Pam 738-750, as contained inMaintenance Management Report of Item Packaging Discrepancies.

6 Fillout and forward SF 364 [Report of Discrepancy (ROD)]as prescribed in AR 735-11-2/DLAR 400-54 Discrepancy Report (TDR) (SF367). Fill out and forward Transportation DiscrepancyReport (TDR) (SF 361) as prescribed in AR55-38/NAVSUPINST 75-1 8 REPORTING EQUIPMENT IMPROVEMENTRECOMMENDATIONS (EIRs)If your Radio Set AN/PRC-127 needs improvement,let us know. Send us an EIR. You, the user, are theonly one who can tell us what you don t like about yourequipment. Let us know why you don t like the designor performance. Put it on an SF 368 (Product QualityDeficiency Report). Mail it to: Commander, US ArmyCommunications-Electronics Command and FortMonmouth, ATTN: AMSEL-ED-WI, Fort Monmouth,New Jersey, 07703-5000. We ll send you a Receiver/Transmitter RT- 1594/PRC-127 iswarranted by the King Radio Corporation for 24months from acceptance as evidenced by the signingof DD Form 250 by an authorized Governmentrepresentative of acceptance for the equipment or 12months after handoff to a field unit, whichever occursfirst.

7 Report all defects in material or workmanship toyour supervisor, who will take appropriate actionthrough your unit maintenance NOMENCLATURE CROSS-REFERENCELISTC ommon names will be used when following majorcomponents are mentioned in this NameOfficial Nomenclatureradio setRadio Set AN/PRC-127R/TReceiver/TransmitterRT-1594 /PRC-127antennaAntenna AS-3960/PRC-12713-Section DESCRIPTION1-6 PURPOSE AND USE OF RADIO SETAN/PRC-127 The radio set is a hand-held, 14-channelreceiver/transmitter that provides two-way radiocommunications in the 136 to 160 MHz frequencyrange. DC power is provided by a detachable batterypack. The radio set consists of an R/T, an antenna,two rechargeable nickel-cadmium (Ni-Cd) batterypacks and one nonrechargeable alkaline battery pack,a speaker/microphone, a speaker/microphone cover,door microphone, a speaker/microphone cover, doorcover, an R/T holster, and a battery charger.

8 Thesemajor components are described in paragraph 1-71-41-7 LOCATION AND DESCRIPTION OFMAJOR COMPONENTS\The components shown make upRadio Set COVERJ (PROTECTS DISPLAYAND KEYPAD)15miiiat--cc?l-8. R/T UNIT AND BATTERY PACK to MHzPreset channel modulation (fm) metersBattery operating timeAlkaline battery hoursNi-Cd battery hoursPower (including battery andantenna, no handset).. ( kg)SizeR/T unit including battery .. in.( ) x in. ( mm) in. ( mm)EnvironmentalOperating temperatureIrange..*..-11 F to +111 F(-24 C to +44 C)Watertightness..not immersible17-Input voltage.. 115 V ac/230 V ac (selectable)Input frequency ..50/60 HzInput power..15 WCharge currentSlow Charge rateMinimum..60 mAMaximum.. 140 mAFast charge rateminimum.. l .. 700 mAmaximum.. 1100 mAPhysicalWeight.

9 Lb ( kg)Size.. in. ( mm) x in. ( mm)x in. ( mm)EnvironmentalOperating temperaturerange ..+32 F to +140 F (O C to +60 C)Humidity ..0 to 90% at ambient temperatureof +95 F (+35 F)Section PRINCIPLES OF OPERATIONl-l 0. RECEIVER/TRANSMITTER RT-1594/PRC-127 The R/T contains the circuitry to receive and transmitvoice signals over a distance of 3000 meters using anyone of up to 14 preset channels. Each of the 14channels is preset to a specific frequency. A volumecontrol is provided to adjust the receive signal to acomfortable listening level. A squelch control isprovided to inhibit noise and unwanted receiversignals. A push-to-talk control is provided to key thetransmitter. The control is pressed to talk and releasedto listen. A speaker/microphone is built into the R/T foruse without an external R/T preset operational channelsare programmed as a maintenancefunction by unit maintenance 1 l ANTENNA AS-3960/PRC-127 The antenna is used to interface the received andtransmitted signals with the R/T.

10 This omnidirectional,flexible antenna attaches to the R/T via a connectorand can be detached for storage or BATTERY PACKThe battery pack supplies dc operating power to theR/T. The battery pack attaches to the bottom of theR/T and is held in place by a spring clip and bracket onthe R/T and posts on the battery pack. The batterypack can be removed easily for replacement. Twotypes of battery packs are provided. One type is arechargeable Ni-Cd battery pack. The second typecontains nonrechargeable alkaline batteries. The Ni-Cd battery pack may be recharged while eitherattached or detached to/from the speaker/microphone clips securely to collar orlapel to provide communication without removing theR/T from the operator s belt. A built-in feature on thespeaker/microphone allows the operator to speakdirectly into the microphone attached to the lapel whilekeying the transmitter using the push-to-talk control onthe R/T attached to the belt.