User Manual

Troubleshooting68P09255A57-2

Aug 2002

SC4812ET Optimization/ATP Manual Software Release R16.1.x.x

PRELIMINARY

6-5

Table 6-6: Troubleshooting Device Enable (INS) Failure

 ActionStep

3 Ensure primary CSM is in INS_ACT state.

NOTE

MCCs will not go INS without the CSM being INS.

4 Verify 19.6608 MHz CSM clock; MCCs will not go INS otherwise.

5 The BBX should not be enabled for ATP tests.

6 If MCCs give “invalid or no system time,” verify the CSM is enabled.

LPA Errors

Follow the procedure in Table 6-7 to troubleshoot any LPA errors.

Table 6-7: LPA Errors

 Step Action

1 If LPAs continue to give alarms, even after cycling power at the circuit breakers, then connect an

MMI cable to the LPA and set up a Hyperterminal connection. Enter

ALARMS in the

Hyperterminal window. The resulting LMF display may provide an indication of the problem.

(Call Field Support for further assistance.)

Bay Level Offset Calibration Failure

Follow the procedure in Table 6-8 to troubleshoot a BLO calibration

failure.

Table 6-8: Troubleshooting BLO Calibration Failure

 Step Action

1 Verify the Power Meter is configured correctly (see the test equipment setup section) and

connection is made to the proper TX port.

2 Verify the parameters in the bts-#.cdf file are set correctly for the following bands:

For 1900 MHz:

BandClass=1; FreqBand=16

For 800 MHz:

BandClass=0; FreqBand=8

3 Verify that no LPA in the sector is in alarm state (flashing red LED). Reset the LPA by pulling

the circuit breaker, and after 5 seconds, pushing back in.

4 Re-calibrate the Power Meter and verify it is calibrated correctly with cal factors from sensor

head.

5 Verify GPIB adapter is not locked up. Under normal conditions, only 2 green LEDs must be

‘ON’ (Power and Ready). If any other LED is continuously ‘ON’, power-cycle (turn power off

and on) the GPIB Box and retry.

6 Verify sensor head is functioning properly by checking it with the 1 mW (0 dBm) Power Ref

signal.

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