User Manual

Troubleshooting
68P09255A57-2
Aug 2002
SC4812ET Optimization/ATP Manual Software Release R16.1.x.x
PRELIMINARY
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Cannot Perform Carrier Measurement
Follow the procedure in Table 6-14 to troubleshoot carrier measurement
failure.
Table 6-14: Troubleshooting Carrier Measurement Failure
 Step Action
1 Perform the test manually, using the spread CDMA signal. Verify High Stability 10 MHz
Rubidium Standard is warmed up (60 minutes) and properly connected to test set-up.
Multi-FER Test Failure
Follow the procedure in Table 6-15 to troubleshoot multi-FER failure.
Table 6-15: Troubleshooting Multi-FER Failure
 Step Action
1 Verify test equipment set up is correct for a FER test.
2 Verify test equipment is locked to 19.6608 and even second clocks. The yellow
LED (REF UNLOCK) must be OFF.
3 Verify MCCs have been loaded with data and are INS-ACT.
4 Disable and re-enable the MCC (one or more based on extent of failure).
5 Disable, re-load code and data, and re-enable MCC (one or more MCCs based on
extent of failure).
6 Verify antenna connections to frame are correct based on the directions messages.
Problem Description
Many of the Clock Synchronization Manager (CSM) boards may be
resolved in the field before sending the boards to the factory for repair.
This section describes known CSM problems identified in field returns,
some of which are field-repairable. Check these problems before
returning suspect CSM boards.
Intermittent 19.6608 MHz Reference Clock/GPS Receiver Operation
If having any problems with CSM board kit numbers, SGLN1145 or
SGLN4132, check the suffix with the kit number. If the kit has version
“AB,” then replace with version ‘‘BC’’ or higher, and return model AB
to the repair center.
No GPS Reference Source
Check the CSM boards for proper hardware configuration. RF-GPS
(Local GPS) - CSM kit SGLN1145, which should be installed in Slot l,
has an on-board GPS receiver; while kit SGLN4132, in Slot 2, does not
have a GPS receiver.
Remote GPS (R-GPS) - Kit SGLN4132ED or later, which should be
installed in both Slot 1 and Slot 2, does not have a GPS receiver. Any
incorrectly configured board must be returned to the repair center. Do not
attempt to change hardware configuration in the field. Also, verify the
GPS antenna is not damaged and is installed per recommended
guidelines.
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