User's Manual Part 3

Troubleshooting: Calibration

DRAFT

SC4812ET BTS Optimization/ATP — CDMA LMF

Apr 2001

6-6

Bay Level Offset 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.

7 If communication between the LMF and Power Meter is operational, the Meter

display will show “RES :’’

8 Verify the combiner frequency is the same as the test freq/chan.