Refraction Technology 130-01, Operation Manual

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Refraction Technology
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6 Logfile Example
6.1 Timing examples
289:22:14:42 EXTERNAL CLOCK WAKEUP
The DAS issues a command to turn on the power to the 130 GPS.
323:06:03:10 EXTERNAL CLOCK POWER IS TURNED ON
The DAS gets a confirmation message from the 130-GPS that it has powered up.
289:22:15:58 EXTERNAL CLOCK IS UNLOCKED
The DAS receives messages from the 130-GPS that it is not locked. The 130 GPS is
powered up and searching for satellites to lock onto but does not have enough
satellites to declare a lock.
289:22:16:58 EXTERNAL CLOCK IS LOCKED
The DAS receives a locked message from the 130-GPS. The DAS will then use the
130-GPS to correct its internal oscillator.
018:09:06:44 INTERNAL CLOCK TIME JERK ENABLED
The DAS compares the 130-GPS time to its internal oscillator time at the first GPS
lock since the 130 power-up or reset. If a change is required to equal the 130-GPS
time, it 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 1PPS or
1 Hz rise from the 130-GPS.
018:09:06:44 INTERNAL CLOCK TIME JERK # 1 OCCURRED AT 09:06:44.553
The DAS internal clock was changed according to the 130-GPS time pulse, 1 PPS.
It will be only correct to the next 1 Hz pulse and therefore no more than a 1
second correction occurred.