User Manual

CSM System Time/GPS and HSO Verification – continued
3-44 1X SC4812T–MC BTS Optimization/ATP 5/21/04
DRAFT
Figure 3-12: CSM MMI terminal connection
NULL MODEM
BOARD
(TRN9666A)
RS–232 SERIAL
MODEM CABLE
DB9–TO–DB25
ADAPTER
COM1
LMF
NOTEBOOK
FW00372
CSM board shown
removed from frame
19.6 MHZ TEST
POINT REFERENCE
(NOTE 1)
EVEN SECOND
TICK TEST POINT
REFERENCE
GPS RECEIVER
ANTENNA INPUT
GPS RECEIVER
MMI SERIAL
PORT
ANTENNA COAX
CABLE
REFERENCE
OSCILLATOR
9–PIN TO 9–PIN
RS–232 CABLE
NOTES:
1. One LED on each CSM:
Green = IN–SERVICE ACTIVE
Fast Flashing Green = OOS–RAM
Red = Fault Condition
Flashing Green & Red = Fault
GPS Initialization/Verification
Follow the procedure in Table 3-20 to initialize and verify proper GPS
receiver operation.
Prerequisites
Ensure the following prerequisites have been met before proceeding:
S The LMF is not logged into the BTS.
S The COM1 port is connected to the MMI port of the primary CSM via
a null modem board (see Figure 3-12).
S The primary CSM and HSO (if equipped) have been warmed up for at
least 15 minutes.
3