User's Manual Part 1

FiberDistributedAntennaSystem(FiberDAS)
33
DMU – Remote head end
Bird'sDMU100seriesisacompactheadendthatcanfunctionasalowpowerrepeaterorBTSinte rface.Theunitcan
directlysupportupto4remotesorcanfiberfeedaHeadendMasterUnit.Remoteaccessisprovidedbyeitherthe
BirdRGWorviaEthernetconnection.Theunitisaruggedc
onvectioncooled,IP65chassisdesignedforoutdoor
locations.
Itispossibletobu
ildtheDMUtosu pportmorethanoneband,however,thetypesofbandsandthenecessary
duplexersforaconfigurationmustbeverifiedtoensurecompatibilitywiththeRGW.
Figure 20 DMU – Remote Head End
In Figure21 ,theDMUisusedtopickupthesignalataremotelocationandthenitistransmittedonthefiberto
fourdifferentloc
ationsthatneedcoverage.TheRUcanbeconnectedtocoaxialspreadingnetworksifneeded.
Figure 21
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

DMU Feeding Remote Units
In Figure22 ,theDMUisfeedingaHeadendMasterUnitwhichinturnfeedstheRemoteUnits(RU).Thisisafar
moreflexiblesolutionan
dwouldbepreferredwhenpossible.
Figure 22
D
M
U
Head
end
R
U
R
U
R
U
R
U
Fiber-Optic Cable
DMU Feeding BMU
TheDMUisequippedwithalowpoweruplinkamplifier.Theunitshouldbeusedinalocationthathasadequate
signalsothatpowerlevelofamobilephonewillsuffice.