User's Manual

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IntercomInterface
TheU9922‐G38canbeconfiguredinoneoftwoways:3800interfaceandstand‐alone.
3800Interface
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Thisconfigurationaddswirelesscapabilitytoanexisting3800wiredintercomsystemand
canreplaceaU3811orU3815radiointerfacemodule(see3800systemdocumentation
forfurtherdetails.)Inthisway,allwiredandwirelessusersmaycommunicatewitheach
otheraswellastalkoverandlistento
atwo‐wayradio.AC38‐xxsystemcableand
optionalC3821radiointerfacecablearerequiredforthisconfiguration.
Stand‐alone
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Stand‐aloneconfigurationcreatesanad‐hocwirelessintercomandaddsaccesstoatwo‐
wayradio.Thisconfigurationdoesnotconnecttoa3800wiredintercomsystem.AC99‐
22PW(18748G‐24)powercableandoptionalC3821radiointerfacecablearerequired for
thisconfiguration.
Antenna
TheU9922‐G38
hastwoexternalantennaconnectionsandissuppliedwithonewhipstyle
antenna.Inmostapplicationsasinglewhipantennaissufficient.Howevertheoptionalremote
antennakit(P/N:40688G‐93)isavailableshouldmorerangebedesired.Inthiscase,we
recommendkeepingonewhipantennaconnecteddirectlytothe
U9922‐G38androutingthe
remoteantennasomewhereelse(suchasontheroofofavehicle).
Chooseanopen,clearlocationfortheremoteantennaandroutethecoaxialcableawayfrom
anybusyareas,preferablybehindpanelsorinconduits.
Thisdevicehasbeendesignedtooperatewith
theantennaslistedbelow,andhavinga
maximumgainof3dB.Antennasnotincludedinthislistorhavingagaingreaterthan3dBare
strictlyprohibitedforusewiththisdevice.Therequiredantennaimpedanceis50ohms.
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Acceptableantennasforusewiththisproduct:
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• Whip
Antenna(P/N:40688G‐92)
• RemoteAntennaKit(P/N:40688G‐93)
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