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REPEATERS¥Stems ' If you have issues viewing or accessing this file contact us at NCJRS.gov. .. "-~~-' .. '~~,~-c-r:,~,?:P:;~~~ \' ., ... '~\ ..:~! ".'-~\~~-­ ''-'---NILECj-STD~0213.00 \ ,.--, NOV.EMBER 1977 ' . i ,~AW, ENFORCEMENTSTANDARDSPROG'RAM'" " . ". it Y. \ .' , ..,. "FM~'~~~-;, ;- ".'11,' REPEATERS¥StEMS. ,:" '. -.... "" '\ ' . '. , "- '/ ! '." , G u~s. DEPARTMENT OF JUSTICE law' Enforcelpent Assistance AdministtatiQ,n -.' National Institute of (ih,,¥Enforcement and Criminal Ju$tice' \\ ',~ , ~ , :1 -' >~ ,~ .:. , " , .' '. .' ". '.~ , f······· . i " NILECJ' /I'STANDARDJ I . FOR, FMli REPEATER SYSTEMS ., '-; -~·o--~,-~o":;._. o .....•, "-;- . ". =c"'-~~lJ·II'><'<~~~.;;:: ~j .' . "i A Voluntary National Standard Promulgated by the ! ." '1 (;l '.':'1 National Institute of Law Enforcement and Criminal~, Justice. i I ;) /1 NOVEMBER 1.977 .' I, u.s. DEPARTMEN:T OF JUSTICE· . law Enforcemeot Assis~tance Administration ~: National Institute of Law Enforcement and Criminal Justice ." " it " . :'1 .' ;j · '. 0.·· NATmONAL INSTITUTE, OF lAW ~NFORCEM~~T t. AND CRIMINAL JUSTICE J:; Blair G. Ewing. Acting Director \ lAW ENFORCEMENT ASSISTANCE ADMINISTRATION James M. H. Gregg, Acting Administrator e.G. ACKNOWELD~MENTS This standard was formulated by the Law Enforsement Standai-ds LabOratory.' of the Natiomil Bureau of Standards under the direction of Marshall J. Treado,ProgramManager for Communications Systems, and Jacob J. Diamond, Chief of LESt. NBS Electromagnetics Division staff membersrespGnsible for the preparation of the standard were Harold E. Taggart, project manager, Robert M. Jickling, and John F. Shafer. Acknowledgment is given to p~evious work in this field by the A'ssociated Public-Safety 90mmunica­ tions Officers, Inc.; The Institute of Electrical and Electronics Engineers, Inc.; and the Electronics Industries Association. For sale by the Superintendent of Documents,' U.S. Government Printing Office Washington, D,C. 20402 Stock Number 027.:..000-00568-3 , ...:' .u ': Ct· f' ~.. f NILECJ STAN'J)ARD ~. .FOR ~!',~'.'},...•,\ FM REPEATER SYSTEMS .' CONTENTS· Page Foreword ......... " ............. , ..'. • . .. ... .. .. v I. Purpose and Scope ......... ;' . '.' . , ...... , . ... .. 1 2. Classification .... , . ~ .................................................... : 1 3. Definitions ...............•............. '........................... '" ... , .. '. 1 I. I': 4. Requirements ............................................... ~ . .. .. .. 2 I 4.1 Minimum Performance Requirements ............. ~. .. 2 4.2 User' Information .; ...................' ..... , '. " ...................... ,.,_, ~. 2 4.3 Test Sequence ................................' ....................'. .. 2 4.4 Environmental Characteristics ................................. ~'. .. 2 ".'.j 4.5 Repeater Characteristics ............ .- ..... : ................... " .. ,,~ . .• 3 5. Test Methods .....................•.............................' ........ 4 5.1 Standard Test Conditions. .. .. .. 4 . 5.2 Test Equipment ..... ; ................... ': .................... '. .. 4 5.3' Environmental Tests .........', ....................... : .............. ;. 5 5.4 Repeater Tests ...........................................'. .. 5 Appendix A. Bibliography ................ ~ ............. ~ . .. .. 8 " .... - '0 .r.; -;r iii ",,;' <'I, ".; , 11 ,I i, FOREWORD Following a Congressional mandate 1 to develop new and improved techniques, systeiiT!s, and equipment to strengthen law enforcement anc!. criminal justice, the National Institute of Law Enforcemenr: and Criminal Justice (NILECJ) has established the Law Enforcement Standards Laboratory (LESL) at the National Bure'auof Standards. LESL's functipn is to conduct research that will assist law enforcement and criminal justice agencies in t,he selection and procurement of quality equipment. , In response to priorities established by NILEC~, LESL is (I) subjectIng existing equipment to laboratory testing and evaluation and (2) conducting research leading to the development of several series of documents, including," national voluntary equiBment standards, user guidelines, state-of-the-art surveys and other reports. This document, NILECJ-STD-Q213.00," Fl\1, Repe~ter ~ystems, isa law enforcerrient equipment standard developed by LESL and approved and issued ·by NILECJ. Additional standards as well as other documents are being issued 'under the LESL program in the t 0'1 areas of protective equipment, communications equipment, security systems, weapons, emergency ~quiprrient, investigative aids, vehicles and clothing . ., This equipment standard is a technical document S;ol1sisting of performance arid other requirements, together with a description of test methods. Equipment which can meet these requirements is of superior quality an,<:l, is suited to the needs of law enforcement agencies. Purchasing agents can use the testc'methods described in this .standard todeterm~ne ,firsthand whether a particular equipment-item meets the requirements ofthestandard;"or they may have the tests c~nduct~d on their behalf by a qualified testing lal:~)fatpl)'. Law enforcement personnel may also reference'this standard in purchase documents and require that any equipment offered for purchase meet its requirem~nts and t~:at this compliance, be either guaranteed' by the vendor or attested to by an independent tes,ting laboratol): . ' The necessarily technical nature of this NrLECJ standar~,and its special focus. as a procurem.ent aid, make it of limited use to those who seek' general guidance conce"rning FM repeater systems. The NILECJGuideiine Series is designed to fiU that need. ,We plan to issue guidelines to this as well as other law enforcement equipment as' soon as possible, within the' constraints of available funding and theoveraJl NILECJ program. " _ The guideline documents being' issued are) highly readable and tutorial •in nature: in contrast to the standards, which are highly. technical and intended for .laboratory use 'by technical personnel. The guidelines provide, in non-technical language, information for purchasing agents and other interested persons concerning the 'capabilities of equipment ,. currently available. They may then select equipment. appropriate to the, performance ' required by their agency. Recommendations for the development ofsparticular guidelines '. should be sent to us. ,. NJLECJ staridardsat~))~u~bj~cted to continuing review. Technical, comments and recommended revisions ,; are invited·fromaUinterested parties. Suggestions should, be' addressed to the Program Manager for Standards;·Nationl:\l I,nstittite of Law Enforcement ,find Criminal Justice, Law EnfOrcement Assist~nce Admirii'sltation ... ,.U.S. Department of Justice, Washington, D.C. 20531. Lester D. Shubin Program Manager for Standards National Institute of Law Enforcement aond Criminal Justice ISection 402(b) of the Omnibus Crime Control and Safe Streets Act of 1968. as amended. v , ·W '" I' ",' C NILECJ·STD.0213.00 NllECJ STANDARD for FM REPEATERSYSTEMS~~- 1. PURPOSE AND SCOPE The purpose of this document is to establish petformance requirements and test. methods for frequency' modulated repeater &ystems u!)ed by law enfOrCement agencies. For fixed repeaters, these requ.irementscollJplement those established by. the NILECJ fixed and ba!le station transmitter and receiver stalldards [17,21]. Likewise, for mobile repeaters, these requirements complement those established by the NILECJ mobile transmitteran~ receiver standards [18, 22]. This standard applies to repeater, systems which either do not haye special subsystems such as tone coding or selective signaling, or in which such subsystems are bypassed or disabled during testing for compliance with this standard. 2. CLASSIFICATION ., For the purposes of this standard, FM repeaters are classified by the band and number of operating frequencies. 2.1 Frequency Band 2.1.1 Type I II Repeaters which operateTn the 400-512 MH21 band. 2.1:2 Type II . Repeaters which operate in the 150-174 MHz band. 2.1.3 Type III Repeaters which operate in the 25-50 MHz band. 2.2 Number of Operating Frequencies ,-; 2.2.1 Type A . D Repeaters which receive and retransmit on. the same frequency (F1/F1). 2.2.2 Type B Repeaters which receive on one frequency and retransmit on a differenHrequencyotF1/~o '"~..:;::::;-.--::=.' '," F2)· 2.3 Repeater Mobility 2.3.1 Fixed Repeater See paragraph 3.2. 2.3.2 Mobile Repeater See paragraph 3.3. 3. DEFINITIONS The principal terms used in this document are defined in this section. Additional definitions relating to law enforcement coml11unications are given in LESP-RPT-0203:00, "Technical Terms and DefinitiollsUsed with Law Enforcement Communications Equip- ment (Radio Antennas, Transmi{t~rS and Receivers) [9]." .... , :.; /0" ' 3.1 "Duplexer c' " A device that permits a single antenna system to 'be used simultaneously for both receiving and trnn'smittipg., , ',' '3.2 Fixed Repeat~r (MQbile Relay St~tion) () , A base station'that aVJoJ:tluticalJy retransmits mobi'le service communications that originate on, the transmitting freqilen~y of the mobile stations and are retransmitted on the receiving frequency of the mobile' stations. 3.3 Mobile Repeater (Mobile Repeat'er St~tion) A mobiie station that automatically'~;retransriiits,on a mobile servic,eJrequency those communications originated by handcarried mobile units or by other ,mobile or base stations directed to such hand-carried units. ' 3.4 Repeater A combination of apparatus for receiving RF communication signals and automat!cally retransmitting
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