User's Manual

Troubleshooting: Calibration – continued

May 2000

6-7

SC 4812T CDMA BTS Optimization/ATP

Cannot Load BLO

For Load BLO failures see Table 6-7.

Calibration Audit Failure

Follow the procedure in Table 6-9 to troubleshoot a calibration audit

failure.

Table 6-9: Troubleshooting Calibration Audit Failure

 Step Action

1 Verify Power Meter is configured correctly (refer to the test equipment setup section of Chapter 3).

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

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

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

4 Verify that no sensor head is functioning properly by checking it with the 1 mW (0 dBm) Power

Ref signal.

5 After calibration, the BLO data must be re-loaded to the BBX2s before auditing. Click on the

BBX2(s) and select Device>Download BLO

Re-try the audit.

6 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.