User's Manual

Confidential&Proprietary108/122 SC‐DAS
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ROUOpticCompOperation
TheROUhasthefunctionofautomaticallycompensatingforopticalloss.Itcandotheworkforupto
5dBoofopticalloss.Set“TXOPTICCOMP”oftheMRUto"ON."OpticalcompensationofROUcan
notbemadewithoutcommunicationtotheODUorOEU.For1dBoofopticalloss,basicTXOPTIC
ATTis1dB;for5dBoofopticalloss,TXOPTICATTis4dB.OPTICCOMPworksonlyonetimebeforeit
staysdormant.
ThefigurebelowshowsascreenforOPTICInformationinROUGUI.
LDPOWERreferencestheoutputlevelofROULaserDiodewhichissenttoaupperunitbytheROU.
PDPOWERreferencestheinputlevelofPhotoDiodetobereceivedfromaupperunit.
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Figure6.12–OpticalinformationattheROU
Initially,WhentheROUcommunicateswiththeupperdevice(ODU/OEU),opticallosscompensation
isdoneautomatically.Duringopticallosscompensation,theresultwindowshows"Processing"and
thenaresultvalueisdisplayed.Therearethreetypesofresultsasfollows:
1. Success:Theopticalcompensationisnormallycompleted.
2. OverOpticLoss:Generatedopticallossis5dBoormore.
3. CommunicationFail:CommunicationwithROUisinpoorcondition.
Continueif TXopticresultissuccessful.Iftheresultsare“over opticLoss”,cleanopticalconnector
faceusingclearcloth,andthenoperateTXOPTICCOMPagain.
Also, you canperform optical losscompensationmanually. Here, RUN Modedisplaystwo types as
shownbelow
1. Auto:CPUofMRUisperformedautomaticallywheniscommnincatedwithupperdevice
2. Manual:whenuserperformsmanually.Thisresultwilldisplay