User's Manual

Troubleshooting: RFDS68P64115A18–1

Mar 2003

1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x

DRAFT

6-27

All RX and TX Paths Fail

If every receive or transmit path fails, the problem most likely lies with

the rf converter board or the transceiver board. Replace the RFDS with a

known–good unit and retest.

All Tests Fail on a Single Antenna

If all path failures are on one antenna port, forward and/or reflected,

make the following checks.

Table 6-30: RFDS Fault Isolation – All Tests Fail on Single Antenna Path

Step Action

1 Visually inspect the frame internal RFDS cabling to the suspect TRDC or DRDC.

2 Verify the forward and reflected ports connect to the correct RFDS antenna select unit positions on the

RFDS ASU card. Refer to the RFDS installation manual for details.

3 Replace the RFDS with a known–good unit.

4 Replace the RF cables between the affected TRDC or DRDC and the RFDS.