User's Manual

CSM System Time – GPS and HSO Verification – continued

3-54 1X SC 4812T Lite BTS Optimization/ATP FEB 2005

PRELIMINARY

Table 3-24: GPS Initialization/Verification Procedure

n ActionStep

3 If the HSO does not appear as one of the sources, then configure the HSO as a Back–up Source by

entering the following command at the CSM> Prompt.

csm>ss 1 12

– After a maximum of 15 minutes, the Rubidium Oscillator should reach operational

temperature and the PWR/ALM LED on the HSO should now have changed from red to

green.

S If the LED is green, proceed to Step 5.

S If the LED is RED, proceed to Step 4.

4 verify that the HSO had been powered–up for at least 5 minutes.

– After the oscillator temperature is stable, the LED should go GREEN.

– Wait for this to occur before continuing!

5 After the HSO LED has changed to green, enter the following command at the CSM> Prompt.

csm>sources <cr>

– The HSO should be valid within one (1) minute, assuming the DPLL is locked and the HSO

Rubidium Oscillator is fully warmed.

6 Verify that the HSO is now a valid source by confirming that the bold text below matches the

response of the “sources” command.

Num Source Name Type TO Good Status Last Phase Target Phase Valid

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––

0 Local GPS Primary 4 Yes Good 3 0 Yes

HSO Backup 4 Yes N/A xxxxxxxxxx xxxxxxxxxx Yes

S If “timed out” is displayed in the Last Phase column, suspect the HSO Output Buffer or

Oscillator to be defective.

– Replace the HSO before proceeding.

S If “timed out” is not displayed in the “Last Phase” Column, proceed to Step 7.

7 HSO Information (underlined text above in Step 6, verified from left to right) is usually the #1

Reference Source.

– If this is not the case, proceed to Step 8.

8 At the OMC–R, determine if the correct BTS Timing Source has been identified in the database by

entering the following command.

omc–000000 >display bts csmgen

9 From the system response to the command in Step 8, if the correct BTS Timing Source is not

listed, enter the following command to make corrections to the database.

omc–000000 >edit csm csmgen refsrc

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