User's Manual

1/28/2015 LMU42x0Hardware&InstallationGuidePULSWiki
https://puls.calamp.com/wiki/LMU42x0_Hardware_%26_Installation_Guide 31/47
ThedimensionsoftheLMUshouldbetakenintoaccount,particularlywheninstallinginavehicle:
WhetheryouintendtoplacetheLMUunderaseatorintoacavitybehindthevehicle’sinteriormoldedtrim,be
suretheLMUwillfitbeforedrillinganyholesorrunningcable
BecertainthatthecablesrunningtotheLMUwillnotbebentorconstricted.Damagetothecables
mayimpedetheLMU’sperformance.
BecertainthattheinstallationpointwillnotviolateanyoftheLMU’senvironmentalspecification
(temperature,moisture,etc…)asimproperinstallationoftheLMUmayvoidthewarranty.
SeetheLMUEnvironmentalSpecificationsfortheexactmeasurementsandspecificationsoftheLMU
42x0™.
TypicalinstallationswillplacetheLMUunderthevehicledashboard,orinthetrunk.Makesureyoucanget
accesstotheunitafterwardsasundersomecircumstancesitmaybenecessarytoaddadditionalwiringor
connectionstotheLMU.
5.2.2PlacementofAntennas
Thereareeffectivelythreeoptionsforplacementsofanantenna:
Roofmount(magneticorthruhole)
Glassmount
Covert(e.g.undertheseat,dash,etc…)
CommAntennaPlacementGuidelines
TheComm.Antennamustbelocatedatleast20cmawayfromvehiclepassengers,otherpersonnel,or
bystandersinordertocomplywithFCCradiofrequencyexposurelimits.
Typically,theCommantennausedbytheLMUforwirelessserviceisastandard3dBgainwhip.Itmounts
withstandardmounts(i.e.thruhole,magneticmountorpeelandstick)andrequiresagroundplanetowork
properly.Ifpossible,itshouldbelocatedatleast3feetfromtheGPSantenna.Ensurethatthecabledoesnot
getcrushedduringinstallation.
PleasenotethattheantennasprovidedbyCalAmpcombineboththeGPSandCommportions.
GPSAntennaPlacementGuidelines
InordertomaximizetheperformanceoftheLMUtheGPSantennashouldhaveaclearviewofthesky.When
installingtheGPSantennaonavehicle,makesurethattherearenoobstructionsclosetotheantennathatmight
blocktheview360°tothehorizon.Thingslikeairhorns,lights,vents,etc…shouldnotblocktheantenna
beyond5°abovethehorizon.Thebestlocationisusuallynearthecenteroftheroof;howeveritisalso
desirabletolocatethecellularantennaasfarfromtheGPSantennaasispractical.