User Manual

System Tests68P09255A57-2
Aug 2002
SC4812ET Optimization/ATP Manual Software Release R16.1.x.x
PRELIMINARY
3-39
NOTE
For RF-GPS, verify the CSM configured with the GPS receiver
“daughter board” is installed in the frame’s CSM 1 slot before
continuing.
Follow the steps outlined in Table 3-23 to enable the CSMs installed in
the C-CCP shelves.
Table 3-23: Enable CSMs
Step Action
1
Click on the target CSM.
From the Device pull down, select Enable.
NOTE
If equipped with two CSMs, enable CSM-2 first
A status report is displayed confirming change in the device(s) status.
Click OK to close the status report window.
NOTE
FAIL may be shown in the status table for enable action. If Waiting For Phase Lock is shown in the
Description field, the CSM changes to the Enabled state after phase lock is achieved.
CSM 1 houses the GPS receiver. The enable sequence can take up to one hour (see below).
* IMPORTANT
The GPS satellite system satellites are not in a geosynchronous orbit and are maintained and operated
by the United States Department of Defense (D.O.D.). The D.O.D. periodically alters satellite orbits;
therefore, satellite trajectories are subject to change. A GPS receiver that is INS contains an “almanac”
that is updated periodically to take these changes into account.
If a GPS receiver has not been updated for a number of weeks, it may take up to an hour for the GPS
receiver “almanac” to be updated.
Once updated, the GPS receiver must track at least four satellites and obtain (hold) a 3-D position fix
for a minimum of 45 seconds before the CSM will come in service. (In some cases, the GPS receiver
needs to track only one satellite, depending on accuracy mode set during the data load).
2
NOTE
If equipped with two CSMs, CSM-1 should be bright green (INS-ACT) and CSM-2 should be dark
green (INS-STY)
If more than an hour has passed, refer to CSM Verification, see Figure 3-7 and Table 3-26 to determine
the cause.
NOTE
After the CSMs have been successfully enabled, observe the PWR/ALM LEDs are steady green
(alternating green/red indicates the card is in an alarm state).
Enable MCCs
This procedure configures the MCC and sets the “TX fine adjust”
parameter. The “TX fine adjust” parameter is not a transmit gain setting,
but a timing adjustment that compensates for the processing delay in the
BTS (approximately 3 mS).
Follow the steps outlined in Table 3-24 to enable the MCCs installed in
the C-CCP shelves.
3