Symmetricom XL-GPS - Manual (Page 32)

22 997-01530-01, Rev. C-25, Jan 2008
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generate 10 MPPS and the procedure would be complete. The same method can be used to configure
any of the outputs.
Note
: PPO and Alarm are only available if those options have been purchased and are enabled using
F126 – Options Key Entry (page 108).
Note : F90 – Code Output Configuration does not control the IRIG signals on the Expansion Module.
Verifying Antenna Installation
After completing the above steps, use the keypad to verify the following:
• In F119 – GPS Receiver Configuration (page 104) , after approximately 20 minutes of operation,
check that GPS STATUS is LOCKED and GPS ANTENNA is OK.
• In F73 – Alarm Control / Status (page 64) , check that the GPS PRI is OK and is ALARM
ENABLED (the same for GPS SEC, if two GPS receivers are present). Clear any alarm latches if
present.
• Press the STATUS key. “LOCKED GPS PRI” should appear on the front panel display without
an asterisk . If an asterisk appears, it means that a reference source is not available.
To troubleshoot a problematic Antenna installation, recheck the physical location of the antenna, the
cabling, and the configuration settings described in this manual.
Switch Position Signal Type
0 Off
1 10 MPPS
2 5 MPPS
3 1 MPPS
4 100 kPPS
5 10 kPPS
6 1 kPPS
7 1 PPS
8 Code DC (IRIG-B DC Time Code)
9 PPO
A Alarm
B-F Not Used