User's Manual
Table Of Contents
- Safety Precautions
- About This Manual
- Table of Contents
- Chapter 1 Introduction
- Chapter 2 System Description
- Chapter 3 Installation guidelines
- Chapter 4 DAS Software Configuration
- Chapter 5 Commissioning
- Chapter 6 RF Commissioning
- Chapter 7 Model Identification
FiberDistributedAntennaSystem(FiberDAS)
33
DMU – Remote head end
Bird'sDMU100seriesisacompactheadendthatcanfunctionasalowpowerrepeaterorBTSinte rface.Theunitcan
directlysupportupto4remotesorcanfiberfeedaHeadendMasterUnit.Remoteaccessisprovidedbyeitherthe
BirdRGWorviaEthernetconnection.Theunitisaruggedc
onvectioncooled,IP65chassisdesignedforoutdoor
locations.
Itispossibletobu
ildtheDMUtosu pportmorethanoneband,however,thetypesofbandsandthenecessary
duplexersforaconfigurationmustbeverifiedtoensurecompatibilitywiththeRGW.
Figure 20 DMU – Remote Head End
In
Figure21
,theDMUisusedtopickupthesignalataremotelocationandthenitistransmittedonthefiberto
fourdifferentloc
ationsthatneedcoverage.TheRUcanbeconnectedtocoaxialspreadingnetworksifneeded.
Figure 21
DMU Feeding Remote Units
In
Figure22
,theDMUisfeedingaHeadendMasterUnitwhichinturnfeedstheRemoteUnits(RU).Thisisafar
moreflexiblesolutionan
dwouldbepreferredwhenpossible.
Figure 22
D
M
U
Head
end
R
U
R
U
R
U
R
U
Fiber-Optic Cable
DMU Feeding BMU
TheDMUisequippedwithalowpoweruplinkamplifier.Theunitshouldbeusedinalocationthathasadequate
signalsothatpowerlevelofamobilephonewillsuffice.