User's Manual

Troubleshooting: Calibration68P64115A18–1
Mar 2003
1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x
DRAFT
6-11
Calibration Audit Failure
Table 6-12: Troubleshooting Calibration Audit Failure
n Step Action
1 Verify the power meter or communications system analyzer is configured correctly (see the Test
Equipment Set–up section of Chapter 3), and is connected to the proper BTS TX antenna
connector.
2 If a power meter is being used:
2a – Re-calibrate the Power Meter and verify it is calibrated correctly with cal factors from the
power sensor (refer to Appendix F).
2b – Verify the power sensor is functioning properly by checking it with the 1–mW (0 dBm) Power
Ref signal.
2c – Verify communication between the LMF and Power Meter is working by checking that the
meter display is showing RES :
3 Verify that no LPA on the carrier is in alarm state (rapidly flashing red LED).
3a – If any are, reset the LPA(s) by pulling the applicable circuit breaker on the DC PDA, and,
after 5 seconds, pushing back in.
4 After calibration, the BLO data must be re-loaded to the BBXs before auditing. Click on the
BBX(s), and in the BTS menu bar select Device > Download >BLO.
Re-try the audit.
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 If calibration was being performed for the redundant BBX, be sure the Single–Sided BLO
checkbox was not checked in the CDMA Test Parameters test set–up window.
7 If additional items, such as directional couplers or combiners, have been installed in the TX path,
be sure that one of the following has been done:
S Verify BLO checkbox in the CDMA Test Parameters test set–up window is unchecked.
S The additional path losses have been added into each applicable sector using the Util > Edit >
TX Coupler Loss... function.
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