Reftek 130-SMHR/9 User Manual page 75

Rev A
018:09:06:45 DSP CLOCK HAS CHANGED 3 TIMES
Indicates the DAS has made three changes to the internal clock since power up.
018:09:07:22 INTERNAL CLOCK PHASE ERROR OF -1 USECONDS
The DAS internal clock or 1 Hz is compared to the 130-GPS 1 Hz periodically and the difference is noted. In this case:
-1 µS
For the first cycle of DAS/130-GPS power the phase error will be checked every minute for 15 minutes. Each
additional lock will have only one phase error check/message.
301:07:30:58 INTERNAL CLOCK PHASE ERROR OF 18 USECONDS
The DAS internal clock or 1 Hz is compared to the 130-GPS 1 Hz periodically and the difference is noted.
In this case: 18 µS
301:10:13:47 INTERNAL CLOCK PHASE ERROR OF 223 MSECONDS
The DAS internal clock or 1 Hz is compared to the 130-GPS 1 Hz periodically and the difference is noted.
In this case: 223 mS
357:09:44:53 GPS: POSITION: N23:18:20.04 E101:23:29.58 +01610M
The DAS prints the 130-GPS position information given by this 130-GPS after lock.
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.
Reftek Systems Inc.
REF TEK 130-SMHR/9 Users Guide
98060-00-UG
5/6/2021
65