Motorola GTR 8000 - Overview for a GTR 8000 Base Radio or GPW 8000 Receiver in Conventional Architectures; ASTRO 25 Conventional Base Radio;Receiver

GTR8000BaseRadio
TheHPDbaseradiousesTimeDivisionMultiplex(TDM)framesforrandomaccesschannels,reservedaccess
channels,andbroadcastmessages.AllcarriersinthesystemaresynchronizedbyaGlobalPositioningSystem
(GPS)sothattransmissionslotsaresynchronizedacrosssites.Thebaseradioisabletoscheduleinbound/outbound
trafcforhalf-duplexMSUssothatoutboundtrafcintendedfortheMSUdoesnotconictwithinboundrandom
orreservedaccesstrafcfromtheMSU.
1.7OverviewforaGTR8000BaseRadioorGPW
8000ReceiverinConventionalArchitectures
Throughoutthismanualtheterm“conventional”addresseseitherananalogonlybaseradio/receiveroran
ASTRO
®
25Conventionalbaseradio/receiverthatoperatesineitherdigitalmodeormixed(analog/digital)mode.
Conventionalbaseradios/receiversoperatewithin:
•ananalogonlyinfrastructure
•aCentralizedorDistributedConventionalArchitecture,or
•anASTRO
®
3.1ConventionalSystem.
Eachconventionalbaseradio/receiveruseseither:
•a2-or4-wireTRCor4-wireEMinterfaceinananaloginfrastructure
•aV .24interfacefordigitalvoiceanddatatrafctoeitheraChannelBank,DigitalInterfaceUnit,CCGW,
MLC8000,orASTRO-TAC3000Comparatorandanoptional4-wirelinkforanalogvoiceinamixed
modeconguration
•anIPinterfacefordigitalvoiceanddatatrafctoaCCGWorGCM8000Comparator.
Forinformationaboutconventionalfunctionsandtopologiessupportedbythebaseradio/receiver,seethe
ConventionalOperationsmanual.NotethatthebaseradiocanbeIPmanagedwhileusingthe4-wire/V .24
interfaceforchanneltrafc.
Abaseradio/receivercanbeimplementedasaQUANTAR
®
replacementwithinanASTRO
®
3.1
conventionalsystem.TheimplementationdetailscanbefoundintheQuickGuideforReplacinga
ConventionalQUANTARwithaGTR8000BaseRadiomanual.
1.7.1ASTRO25ConventionalBaseRadio/Receiver
ASTRO
®
25Conventionalbaseradio/receiverfeaturesinclude:
•SeparateTxandRxnetworkaccesscode
•Consoleorrepeatpriority
•Repeaterset-upknockdownfromtheconsole
•V oiceanddata
•ControlMessages(TSBK)
1-86871022P86-A-November2012