Installation Guide

Table Of Contents

FinMInstallationGuideDQ0266070/A.01 2‐1

Chapter2:SiteInstallation

2.1ScopeofThisChapter

ThischapterdescribeshowtoinstalltheequipmentfortheTransportationFiberinMotion

solution.Itisdividedintotwomainsections:

• Waysideinstallation

• On‐boardinstallation

2.2Wayside

TheFiberinMotionsolutionusesmultipleantennastoenableMIMOandDiversitymodes.

Thesolutionreliesonantennaspacing,aswellasdualpolarization/dualslantedantennasto

differentiatetheradiostreams.

2.2.1Overview

GeneralMountingArrangement

TheTBSunitmustbeinstalledinaRestrictedAccessLocation.

TheTBScanbemountedonapoleorawall,togetherwithitsantennasandLPUs.Toenable

bett erMIMOconditions,theantennasshouldbedividedbetweenverticalandhorizontal

polarizations.Figure 2‐1showsanexampleofaTBSmountedonapole

• Placethetower/TBSatthelocationdeterminedbythesitesurvey.

• Makesurethereissufficientline‐of‐sighttowardsthetracksegmenttheantennas

willcover

• Makesurethattherearenoobstaclesdirectlyinfrontofthe antennas

• Thelowestantennamustbehigherthanthehighestrailcarontheline

• ThereareseveralwaysyoucanorienttheTBSantennas,dependingontheorien‐

tationoftheTMUantennas.TheseoptionsaredetailedinseeTMU‐TBSantenna

alternativeorientationoptionsonpage 2‐48.

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