[email protected] said: > One thing to look out for when messing with sawtooth messages is the > question of does the message come out before or after the PPS pulse... good > look finding the answer in the receiver documentation...
Has anybody asked the manufacturers? This should be easy to see if you record the PPS offset referenced to a good clock and compare that to the reported offset. If the frequency is stable and you are getting a sawtooth (rather than a bridge) then a point on a corrected graph next to the jump in the sawtooth will look good if you have it right or be off by a clock cycle if you have it wrong. [email protected] said: > "After" seems to be the most common answer. That makes hardware/delay line > compensation rather tricky. ... The slides from Tom Clark and Rick Hambly's VLBI talk (page 29) show a before setup. http://www.gpstime.com/files/TOW/tow-time2015.pdf You said "most common". That implies there are both types. (or documentation errors) We should make a list of which GPS modules do it which way. -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
