Refraction Technology 130-01, Operation Manual

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130-01 Operations
Refraction Technology, Inc. 94
305:02:37:56 SIRF: JERK
The DAS compares the 130-GPS time to its internal oscillator time at the first GPS
lock since 130 power-up or reset. If a change is required to equal the 130-GPS
time, enables the timing algorithm that makes the change, Time Jerk. It gives the
time it was enabled and will jerk the DAS internal clock with the next IPPS or 1 Hz
rise from the 130-GPS.
(Message used in early development code).
305:02:37:57 SIRF: TIME SET
The DAS internal clock was changed according to the 130-GPS time pulse.
It will be only correct to the next 1 Hz pulse and therefore no more than 1 second.
(Message used in early development code).
305:09:45:50 EXTERNAL CLOCK ERROR – UNABLE TO CORRECT DRIFT
This message indicates the DAS gave up trying to correct drift of its internal
oscillator due to not enough information coming from the 130-GPS serial time
message and/or 1PPS.
018:09:28:31 EXTERNAL CLOCK ERROR - MISSING 1PPS
This message indicates the DAS does not see the 130-GPS 1 Hz - Hardware
problem.
289:22:16:00 EXTERNAL CLOCK SLEEP
This message indicates DAS has told the 130-GPS to sleep.
This occurs after each GPS cycle - 5 minutes/1 hour.