User's Manual Part 2

Download the BTS – continued

Mar 2001

3-31

SCt4812T CDMA BTS Optimization/ATP

DRAFT

Follow the procedure in Table 3-15 to enable the CSMs.

Table 3-15: Enable CSMs

 Step Action

1 Verify the CSM(s) have been downloaded with code (Yellow, OOS–RAM) and data.

Click on the target CSM.

From the Device pull down, select Enable.

NOTE

If equipped with two CSMs, enable CSM–2 first and then CSM–1.

A status report confirms change in the device(s) status.

Click OK to close the status 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 to complete.

* 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 an installed GPS receiver has not been updated for a number of weeks, it may take up to one

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.)

NOTE

If equipped with two CSMs, the LMF should display CSM-1 as bright GREEN (INS–ACT) and

CSM–2 as dark green (INS–STB). After the CSMs have been successfully enabled, the

PWR/ALM LEDs are steady green (alternating green/red indicates the card is in an alarm state).

If more than an hour has passed, refer to Table 3-19 and Table 3-20 to determine the cause.