FEATURES
• MotorolaPURC
®
compable
• Remotecontrolofmulplepagingtransmiersprovides
beerareaorfrequencycoverage
• Individualaddressingforupto30staons(opon)
• Simulcastdelaymoduleopon
• Sharedchannel“busy”toneindicator
• Posivetonecontroleliminatesstucktransmiers
• Time-outmerprotectsagainstexcessivelylong
transmissions
• Modemallowsremotecontrolfordigitalpaging
• Audiomonitorspeaker
• Frontpanelaccessibleadjustmentsforaudiolevel,from
link(COR)level,andbusytonelevel
• Remotelinktransmiercontrolavailable
• Lowcostofownership
INTRODUCTION
TheZetronModel66TransmierControllerconnectstoa
radiopagingtransmiertoprovideremotecontrolfroma
centralpagingterminal.Usingposiveacontonecontrol
methods,theModel66recognizesitssiteaddress,selects
thetransmiermodulaonmode(analogordigital),keysthe
pagingtransmier,andtransmitsthepagingaudioordigital
data.
TheModel66isidealforwide-areapagingsystemsusedfor
RCC/PCPservice,ulies,publicsafety,andcustomerowned
systems.
TheModel66isalsorecommendedforin-planttype
applicaonswhereasingletransmierislocatedmorethan
30feetfromthepagingterminal.TheModel66provides
electricalisolaonwhichreducesriskofdatacorruponor
damagetotheinterfacesduetonoise.Italsoreducesthe
installaoncostsbecauseonlyatwo-wireinterfaceisneeded
betweenthepagingterminalandthetransmierlocaon.
Model 66 Transmier ControllerSpec Sheet
SYSTEM ARCHITECTURE
Anypagingterminalorcontrolequipmentthatgenerates
theMotorolaPURCtonescaninterfacetotheModel66.The
Model66makesothertypesoftransmierscompablewith
MotorolaPURC
systems.(SeeFigure1.)
Model 33 Paging Network Controller
TheZetronModel33canbeusedtointerfacetopaging
terminalsthatdon’tgeneratetheMotorolaPURCtones
themselves.(SeeFigure2.)
TheModel33isadevicethatconnectsdirectlytoencoders
suchastheZetronModels15,32,or64toprovide
remotecontroloftheModel66.PleaseseetheModel33
specicaonsheetformoredetails.
Paging Links
Conneconsbetweenthecentralpagingcontrollocaon
andtheradiopagingtransmiersitesrequireonlyaudio
gradelinks.Thesepaginglinksmaybeone-waytelephone
circuits,RFlinks,ormicrowavecircuits.Ifthecentralpaging
equipmentneedstoknowthataremotetransmierRF
channelisinuse,thenareverseaudiolinkisrequiredtocarry
theModel66channelbusytone.
Posive Tone Control
Thecentralpagingcontrolterminalencodesthepaging
siteaddress,analog/digitalmode,andtransmierkey-up
informaonasaudiotoneinformaon.Throughuseofthe
low-levelguardtonefeatureoftheMotorolaPURCtone
protocol,theModel66ensuresthatatransmiernever
remainskeyedupaeramessageistransmied.Aguard
toneme-outmerprotectstransmiersthatcannot
withstandconnuoustransmissionfromexcessiveuse.Digital
debouncecircuitrypreventsshortaudiodrop-outsfrom
keyingothetransmierinthemiddleofamessage.
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