User's Manual

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In general, the level of optical PD POWER should be +6dBm~ +2dBm±1.5dB.
What is more, ODU has the function of automatically compensating for optical cables. The
following procedure is related to how to make optical compensation with ROU connected with
port, at a corresponding DOU window of ODU:
1. Check if ODU is smoothly communicating with a corresponding ROU.
2. Select ODU or DOU from the left Tree panel.
3. Set “RX OPTIC COMP” of the optical port of a corresponding DOU as "ON."
4. During optical compensation , the Result window shows "Processing" and then a result
value. There are three types of results as follows:
A. Success: The optical compensation is normally made.
B. Over Optic Loss: Generated optical loss is 5dBo or more.
C. Communication Fail: Communication with ROU is in poor conditin.
5. ATT of optical compensation can work based on the numerical expression of 12-2*(LD
POWER-PD POWER).
6. Optical compensation can be made not only in ODU but also in ROU.
6.2 ROU Operation
The figure below shows the level of the system link of SMDR-NH124 (BIU-ODU-ROU). This
section describes ROU-related information. ROU receives various signals through optical
modules. The signals are filtered only for corresponding signal band from a corresponding RDU
module and amplified with a High Power Amplifier. Then, the multiplexer combines the signals
with others and sends them with an antenna.
6.2.1 ROU Operation
ROU is in one-body enclosure type. ROU is located at a remote closet in a building.
And it can be installed on a wall or into a rack.