User's Manual

Confidential & Proprietary 117/136
Use various upper/lower limits. The following table shows recommended limit settings:
Item Recommended Limit Remark
TX IN HIGH ALM 15dBm Alarm
TX IN LOW ALM -25dBm Alarm
RX OUT ALC 0dBm Auto Level control
RX OUT HIGH ALM 5dBm Alarm
As such, when you finish setting normal input levels and alarm limits, check if the value of
MODULE FAILUER LED Indicator is lit green (Normal case).
6.1.3 RX Operation at BIU
For RX operation at BIU, you need to set RX gain to prevent BTS or BDA from being
affected. There is an ATT setting window to let you adjust gain per band and port.
Total RX gain is 50dB. To adjust a desired gain, you need to do the following. For RX
gain of a desired gain, you can set it as 50dB-RX ATT. Use the terminal and check if TX
Adjust value and Ec/Io value is appropriate.
To block high signals from entering BTS or BDA, keep ALC mode activated (ON).
6.1.4 Setting whether to use ROU/OEU at BIU
BIU controls overall system, working as common part in any equipment. Connect BIU
with such units as ODU, OEU and ROU to be interfaced with the BIU and manually set
whether to use the units at the INSTALL window of BIU.
To inquire and set information on units in lower level (OEU and ROU) at BIU, you need
to check on a corresponding item at INSTALL Menu for a unit to be actually used. This