Motorola GTR 8000 - Replacing the Dual Circulator;Isolator Modules

GTR8000BaseRadio
3SettherockerswitchesonthefrontofthepowersuppliestotheOFF(0)position.
4Removethetransmitltertrayfromtherack,asfollows:
a.LabelanddisconnecttheTxinput,antennaoutput,andgroundcablesfromthetransmitlter.
b.UsingaT30bit,removethetwoscrewswhichsecurethetraytotherack.
c.Slidethetrayoutthefrontoftherack.
5Removethetransmitlterfromthetray,byremovingtheT20screwsthatattachittothetray.
6Installthenewtransmitlterinthetray,asfollows:
a.Placethenewtransmitlterinthetray,inthesamelocationandorientationasthemodulethatyouremoved.
b.Securethereplacementtransmitltertothetray,usingtheT20screwsyoupreviouslyremoved.
7Re-installthetransmitltertrayintherack,asfollows:
a.Slidethetrayinthefrontoftherack.
b.UsingaT30bit,securethetraytotherackwiththetwoscrewsyoupreviouslyremoved.
c.ReconnecttheTxinput,Antennaoutput,andgroundcablestothetransmitlter.
8SettherockerswitchesonthefrontofthepowersuppliestotheON(1)position.
9Enableeachbaseradioasfollows:
a.SelectService→T estMeasurementScreenfromthemenu.
b.ClickChangetoNormalMode.
Stepresult:Thebaseradioisenabled.
9.10ReplacingtheDualCirculator/IsolatorModules
ForaGTR8000BaseRadio,thefollowingRFDSmodulesareassembledinatray:
•ExternalDualCirculator/Isolator
•CirculatorLoad(amodulethatisconnecteddirectlytotheExternalDualCirculatormodule)
•LowPass/HarmonicFilter
Figure9-16andFigure9-17showthesemodulesinstalledonatray.
9-306871022P86-A-November2012