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CSM System Time – GPS and HSO Verification – continued

3-56 1X SC 4812T Lite BTS Optimization/ATP FEB 2005

PRELIMINARY

Table 3-24: GPS Initialization/Verification Procedure

n ActionStep

13 Record the current position Base Site Latitude, Longitude, Height and Height Reference (Height

Reference to Mean Sea Level (MSL) or GPS Height (GPS): GPS = 0 MSL = 1.

If Steps 1 through 12 pass, the GPS is good.

NOTE

If any of the above mentioned areas fail, verify that:

S If Initial Position Accuracy is “estimated” (typical), at least four satellites must be tracked and

visible (one satellite must be tracked and visible if actual Latitude, Longitude, and Height Data

for this site has been entered into CDF File).

S If Initial Position Accuracy is “surveyed,” Position Data currently in the CDF File is assumed

to be accurate.

– The GPS will not automatically survey and update its position.

S The GPS Antenna is not obstructed or misaligned.

S The GPS Antenna Connector Center Conductor measures approximately +5V DC with respect

to the Shield.

S There is no more than 4.5 dB of Signal Loss between the GPS Antenna OSX Connector and the

BTS Frame GPS Input.

S Any Lightning Protection installed between the GPS Antenna and the BTS Frame is installed

correctly.

15 Enter the following command at the CSM> Prompt to verify that the CSM is warmed–up and that

GPS Acquisition has taken place.

csm>debug dpllp

S If the CSM is warmed–up, proceed to Step 17.

S If the CSM is not warmed–up (15 minutes from application of power), proceed to Step 16.

16 Observe the following typical response if the CSM is not warmed–up.

CSM>DPLL Task Wait. 884 seconds left.

DPLL Task Wait. 882 seconds left.

DPLL Task Wait. 880 seconds left. ...........etc.

NOTE

The warm command can be issued at the MMI Port used to force the CSM into Warm–up Mode,

but the Reference Oscillator will be unstable.

17 Observe the following typical response if the CSM is warmed–up.

c:17486 off: –11, 3, 6 TK SRC:0 S0: 3 S1:–2013175,–2013175

c:17486 off: –11

, 3, 6 TK SRC:0 S0: 3 S1:–2013175,–2013175

c:17470 off: –11

, 1, 6 TK SRC:0 S0: 1 S1:–2013175,–2013175

c:17486 off: –11

, 3, 6 TK SRC:0 S0: 3 S1:–2013175,–2013175

c:17470 off: –11

, 1, 6 TK SRC:0 S0: 1 S1:–2013175,–2013175

c:17470 off: –11

, 1, 6 TK SRC:0 S0: 1 S1:–2013175,–2013175

table continued on next page