User's Manual

Confidential&Proprietary114/122 SC‐DAS
After turning on the switch of the power supply in the OEU, check information on each
module'sLEDofthesystem.Thetablebelowshowsnormal/abnormalcasesdependingon
thestatusofeachmodule'sLED.
Unit LED Indicates

Green:LaserDiodenormalstatus
LD

Red:LaserDiodeabnormalstatus

Green:PhotoDiodenormalstatus
EWDM
PD

Red:PhotoDiodeabnormalstatus,inputopticpowerlowalarm

Green:LaserDiodenormalstatus
LD

Red:LaserDiodeabnormalstatus

Green:PhotoDiode(PD)ofopticport1isnormal 
PD1

Red:PDofopticport1isabnormalorinputopticpowerlow

Green:PhotoDiode(PD)ofopticport2isnormal 
PD2

Red:PDofopticport2isabnormalorinputopticpowerlow

Green:PhotoDiode(PD)ofopticport3isnormal 
PD3

Red:PDofopticport3isabnormalorinputopticpowerlow

Green:PhotoDiode(PD)ofopticport4isnormal 
DOU1,2
PD4

Red:PDofopticport4isabnormalorinputopticpowerlow
ON

Green:Poweron 
TXD1

Greenflicker:ECPUsendNMSTxdatatoBIU
RXD1

Greenflicker:ECPUreceiveNMSRxdatafromBIU
TXD2

Greenflicker:ECPUsendNMSTxdatatoROU
RXD2

Greenflicker:ECPUreceiveNMSRxdatafromROU
System
ALM

Green:OEUsystemnormal(noalarm)