User's Manual

Confidential&Proprietary45/122 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