Symmetricom XL-GPS - Manual (Page 117)

997-01530-01, Rev. C-25, Jan 2008 107
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S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
reestablish its current most accurate position.
• Position Hold: The receiver has determined its most accurate position, and is using this static
position to calculate its most accurate time solution.
• Start TRAIM: (for Time Receiver Autonomous Integrity Monitoring) The receiver is in Position
Hold and is monitoring the integrity of the time solution using redundant satellite measurements
in order to eliminate unreliable signal information.
• TRAIM Active: The TRAIM mode is active and working.
In Dynamic Mode: The system has been instructed by the user that its position could change and has set
the GPS mode to Dynamic Mode (see
“F53 – GPS Operation Mode” on page 55 ):
• Stop Site Survey: The receiver has finished checking for changes in its static position.
• Stop TRAIM: The receiver has completed TRAIM monitoring.
• Dynamic Mode: The position is being resolved on an ongoing basis.
Command Line
To obtain the status of the GPS Receiver, enter:
F119<S>S<CR>
For example, enter:
F119 S<CR>
XL-GPS responds (example):
F119 :<CR><LF>
GPS PART NUMBER 87-8028-2<CR><LF>
SOFTWARE 230-01510-04v1.9<CR><LF>
FPGA 230-01510-01<CR><LF>
GPS STATUS LOCKED<CR><LF> (or UNLOCKED)
GPS ANTENNA OPEN<CR><LF> (or SHORT or OK)
GPS ACQUISITION STATE: POSITION HOLD (or one of the following:
DYNAMIC MODE,
STOP SITE SURVEY,
STOP TRAIM,
START SITE SURVEY,
SURVEY POSITION,
POSITION HOLD,
TRAIM ACTIVE)