User Manual

Troubleshooting: Calibration – continued
5/21/04 1X SC4812T–MC BTS Optimization/ATP 6-7
DRAFT
Calibration Audit Failure
Follow the procedure in Table 6-9 to troubleshoot a calibration audit
failure.
Only one carrier can be tested at a time. All PAs must be
INS during testing. For the carriers not under test, key one
BBX per carrier to a minimum power level. (Refer to
Table 3-37).
NOTE
Table 6-9: Troubleshooting Calibration Audit Failure
n Step Action
1 Verify the 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 the sensor
head.
3 Verify that no PA is in alarm state (rapidly flashing red LED).
Reset the PA 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 BBXs before auditing.
Click on the BBX(s) and select Device>Download BLO.
Re-try the audit.
6 Verify the GPIB adapter is not locked up.
Under normal conditions, only two 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.
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