User's Manual Part 3

RBS 2109 User’s Guide

9.3.9 SO CF RU:40/ Antenna

This section describes how to localise an SO CF RU:40/ Antenna fault.

Related RU

The RU listed below has higher priority than the RU described in this section. If

it is present, then go to the related section before handling this RU.

• If ‘‘SO CF RU:34/ IDB’’ appears in the OMT, then proceed with Section

9.3.8 SO CF RU:34/ IDB on page 169

Displaying Fault Information

Display fault information according to Section 9.3.1 Reading Fault Status on

page 159.

Perform the following actions step-by-step until the fault ceases:

Checking IDB Parameters

1. Check that the following values are correctly defined in the IDB:

• RX feeder loss

• TMA gain

Note: TMA loss = –TMA gain

Reading ARAE Alarm Status

Note: This step is only valid if ‘‘SO CF EC2:13/ Auxiliary equipment fault’’

appears in the OMT.

2. In the Configuration menu, select Read IDB and click Yes.

3. In the Maintenance menu, select Monitor.

4. Select Alarm Inlets and click Run.

5. Check that the ARAE fault is correctly defined in the IDB.

6. Check the cable to the equipment supervised by the ARAE alarm.

7. Replace the faulty equipment supervised by that alarm.

Checking RX Diversity

8. Ensure that the cell is configured, in the BSC, with the correct diversity

(RXD).

9. Confirm that radio cables are connected to the correct RRUs and antennas.

N/LZT 720 0090 Uen R1A 2004-09-17