User's Manual

Confidential & Proprietary 86/87
TXD1 Green flicker: TX signals are sent to communicate with BIU.
RXD1 Green flicker: RX signals are received from BIU.
TXD2 Green flicker: TX signals are sent to communicate with ROU.
RXD2 Green flicker: RX signals are received from ROU.
Green: OEU system is normal.
ALM
Red: OEU system is abnormal; check the alarm through RS-232C.
5.5.5 ROU Alarms
No. Unit Description Remark
1 RDU+BPF
Remote Drive Unit
Filter and high amplify TX signals;
Filter and amplify RX signals;
Remove other signals through BPF
2 RPSU
Remote Power Supply Unit
Input power: DC -48V, Output power: 27V,9V, 6V
For 120V input of AC/DC;
For -48V input of DC/DC
3 R-OPTIC
Remote Optic
Make RF conversion of TX optical signals;
Convert RX RF signals into optical signals;
Compensates optical loss
Communicates with BIU/OEU though the FSK modem
4 RCPU
Remote Central Processor Unit
Controls signal of each unit
Monitors BIU/ODU/OEU status through FSK modem
communication
5 Multiplexer
Multiplexer
Combine TX signals from 3 RDUs;
Distribute RX signals to 3 RDUs;
Enable you to use a single antenna port