User's Manual

LTEeNodeBIndoorHardwareInstallationInstallationoftheGPS
InstallationoftheGPS
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InstallingRFGPSantennaandcable
Figure3-13showsthecomponentsoftheRFGPS(RFGPS).
WhenmountingtheRFGPSAntennaconsiderthefollowingitems:
•ThemountingpipefortheRFGPSheadismountedverticallywithlessthanve(5)
degreesoftilt.
•TheRFGPSheadrequiresaclearviewofthesky ,preferablywithinten(10)degreesofthe
horizoninalldirections.
•Themoreskythatisobservedincreasesthenumberofpotentialsatellitesthatcanbe
tracked,resultinginbetterRFGPSperformance.
•Duringnormaloperation,theRFGPSheadcontinuouslytracksaminimumoffour(4)
GPSsatellites.However,itistheoreticallypossibletooperatetheBTSbytrackingonly
one(1)GPSsatellite.Motoroladoesnotrecommendtrackingonlyone(1)GPSsatellite
unlesstherehasbeenanaccuratesitesurvey .
•PlacetheRFGPSheadwhereRFobstructionsoftheskyareminimal.Theskyincludes
everythingwithinten(10)degreesofthehorizoninalldirections.RFobstructionsinclude
buildings,towers,naturalrockformations,snow ,foliage,anddebris.
PerformthefollowingproceduretoinstalllocalGPS(RFGPS):
Procedure3-16InstallingRFGPSantennaandcabling
1
DeterminethelocationfortheRFGPSSurgeProtectiondevice(preferablyat
theentrancetothebuilding).
2
ConnecttheRFGPSSurgeProtectiondevicetothemastergroundbus(MGB).
3
Determinethemountinglocation.
4
CAUTION
Ensurethataqualiedstructuralengineerveriestheroofstructure
onwhichthemountingpoleisattachedfortheweightoftheRFGPS
engineandmountinghardwareunderadverseconditionsinthe
installationarea.
InstallthemountingkitattheRFGPSlocation.Usetheappropriatemounting
boltsformountingsurface.
Continued
68P09308A55-63-25
FEB2010