User Manual

Troubleshooting: Transmit ATP
SC4812ET BTS Optimization/ATP — CDMA LMF
Jan 2002
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Forward link problem
If the BTS passes the reduced ATP tests but has a forward link problem
during normal operation follow the procedure in Table 6-10 to
troubleshoot.
Table 6-10: Troubleshooting Forward Link Failure (BTS Passed Reduced ATP)
 Step Action
1 Perform these additional TX tests to troubleshoot a forward link problem:
– TX mask
– TX rho
– TX code domain
Cannot Perform Txmask
Measurement
Follow the procedure in Table 6-11 to troubleshoot a TX Mask
Measurement failure.
Table 6-11: Troubleshooting TX Mask Measurement Failure
 Step Action
1 Verify that TX audit passes for the BBX(s).
2 If performing manual measurement, verify analyzer setup.
3 Verify that no LPA in the sector is in alarm state (flashing red LED). Re-set the LPA by pulling
the circuit breaker, and, after 5 seconds, pushing it back in.
Cannot Perform Rho or Pilot
Time Offset Measurement
Follow the procedure in Table 6-12 to troubleshoot a rhoand pilot time
offset measurement failure.
Table 6-12: Troubleshooting Rho and Pilot Time Offset Measurement Failure
 Step Action
1 Verify presence of RF signal by switching to spectrum analyzer screen.
2 Verify PN offsets displayed on the analyzer is the same as the PN offset in the CDF file.
3 Re–load MGLI2 data and repeat the test.
4 If performing manual measurement, verify analyzer setup.
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