User's Manual

Confidential & Proprietary 14/44
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Section3 
SystemconfigurationandFunctions
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3.1
 HROU(HighpowerRemoteOpticUnit)
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3.1 HROU (High power Remote Optic Unit)
HROU consists of two unit, one is HMRU(High power Main Remote Unit) and the other is HARU(High
powerAdd‐onRemoteUnit).
The biggest difference between HMRU and HARU is whether R‐OPTIC module exist or not in the
enclosure.
HMRUreceivesTXopticalsignalsfromODUandconvertstheminto
RFsignals.TheconvertedRFsignals
areamplifiedthroughHighPowerAmpinacorresponding HRDUbandcombinedwithUDCU,PAUand
Cavityduplexer,andthenradiatedtotheantennaport.
When receiving RX signals through the antenna port, this unit filters out‐of‐band signals in a
corresponding HRDU
and sends the results to R‐OPTIC to make electronic‐opticalconversion of them.
Afterconverted,thesignalsaresenttoaupperdeviceofODU.HMRUcanbeequippedwithuptofour
HRDUs(HighRemoteDriveUnit)andthemodulesupportssinglebandonly.
HARU receives TX RF signal
 from HMRU and amplifies through High Power Amp in a corresponding
HRDUcombinedwithUDCU,PAUandCavityduplexer,andthenradiatedtotheCU(CombiningUnit)
When receiving RX  signals through the antenna port, HHRDU filters out‐of band signal in a
correspondingHRDUandsendstheresultstoMHRU
throughRFcable.
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