User's Manual

Table Of Contents
Troubleshooting: CSM Checklist
FEB 2005 1X SC 4812T Lite BTS Optimization/ATP 6-21
PRELIMINARY
Problem Description
Many Clock Synchronization Manager (CSM) Card problems 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 Cards.
Intermittent 19.6608 MHz
Reference Clock / GPS
Receiver Operation
If problems are occurring with CSM Card Kit Numbers, SGLN1145 or
SGLN4132, check the Suffix with the Kit Number. If the Kit Number
has version “AB,” then replace it with version ‘‘BC’’ or higher, and
return the Model AB CSM Card to the Repair Center.
No GPS Reference Source
Correct Hardware
Check the CSM Cards for proper hardware configuration for the type of
GPS in use and the SCCP Cage Slot where they are installed.
RF–GPS (Local GPS) – CSM Kit Number SGLN1145, which should
be installed in Slot l, has an on-board GPS Receiver; while Kit Number
SGLN4132, in Slot 2, does not have a GPS Receiver..
Remote GPS (RGPS) – Kit Number 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 that the GPS Antenna is not damaged and is installed
per recommended guidelines.
Checksum Failure
The CSM could have corrupted data in its firmware resulting in a
non-executable code. The problem is usually caused by either electrical
disturbance, or interruption of data during a download. Attempt another
download with no interruptions in the data transfer. Return the CSM
Card back to the Repair Center if the attempt to reload fails.
GPS Bad RX Message Type
This problem is believed to be caused by a later version of CSM
Software (3.5 or higher) being downloaded, via LMF, followed by an
earlier version of CSM Software (3.4 or lower), being downloaded from
the CBSC. Download again with CSM Software Code 3.5 or higher.
Return the CSM Card back to the Repair Center if the attempt to reload
fails.
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