User's Manual

Confidential&Proprietary46/115 SC‐DAS
4.4 ROU(RemoteOpticUnit)
TheROUconsistsoftwounits:theMRU(MainRemoteUnit)andtheARU(AddonRemoteUnit).The
ROUisconsideredthecombinationofMRUandARU.
The MRU receives TX optical signals from the ODU or the OEU and converts them into RF signals.
TheconvertedRFsignalsareamplifiedthrough
aHighPowerAmpinacorrespondingRU, combined
withtheMultiplexerandtransmittedouttheantennaport.
TheROUreceivesRXsignalsthroughtheantennaport,filtersout‐of‐bandsignalsinacorresponding
RU andsendsthe results to Remote OpticModule to make RF tooptical conversion of
them.After
converted,thesignalsaresenttoaupperdevice(theODUorOEU).
TheMRUandARUhaveamaximumof2bands.
ThemaindifferencebetweenanMRUanARUisthepresenceofanopticalmodule.
 
(a)MRU(b)ARU
Figure4.30–ROUataglance