User's Manual

CSM System Time - GPS & LFR/HSO Verification68P09255A69-3

Aug 2002

1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x

PRELIMINARY

3-47

Table 3-25: LORAN-C Initialization/Verification

Step NoteAction

2 Verify the following LFR information (highlighted above in boldface type):

- Locate the “dot” that indicates the current phase locked station assignment (assigned by MM).

- Verify that the station call letters are as specified in site documentation as well as M X Y Z

assignment.

- Verify the S/N ratio of the phase locked station is greater than 8.

3 At the CSM> prompt, enter sources <cr> to display the current status of the the LORAN receiver.

- Observe the following typical response.

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

----------------------------------------------------------------------------

0 Local GPS Primary 4 Yes Good -3 0 Yes

1 LFR ch A Secondary 4 Yes

Good -2013177 -2013177 Yes

2 Not used

Current reference source number: 1

*NOTE “Timed-out” should only be displayed while the LFR is warming up. “Not-Present” or

“Faulty” should not be displayed. If the LFR does not appear as one of the sources, then configure the

LFR as a back-up source by entering the following command at the CSM> prompt:

ss 1 2

LORAN LFR information (highlighted above in boldface type) is usually the #1 reference source

(verified from left to right).

* IMPORTANT

If any of the above mentioned areas fail, verify:

- The LFR antenna is not obstructed or misaligned.

- The antenna pre-amplifier power and calibration twisted pair connections are intact and < 91.4 m

(300 ft) in length.

- A dependable connection to suitable Earth Ground is in place.

- The search list and PLL station for cellsite location are correctly configured .

NOTE

LFR functionality should be verified using the “source” command (as shown in Step 3). Use the

underlined

responses on the LFR row to validate correct LFR operation.

5 Close the HyperTerminal window.