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[aprssig] OT timing

Scott Miller scott at opentrac.org
Mon Sep 22 18:32:11 UTC 2008

Depends on if you're using timeslotting or not.  If timeslotting is 
turned off, they'll wait the specified interval, and then transmit as 
soon as the channel is clear.  The counter starts over again after that 
transmission.  It's not tied to any external clock, and can drift quite 
a bit if the channel is busy.

If you've got timeslotting turned on, then it's synchronized to the GPS 
time.  For multiple trackers, you'll need to set a different offset for 
each one.


John Galvin wrote:
> This question is basically for Scott since it is an OT related question. Say 
> we have a number of OT trackers and all are set to beacon at the same 
> interval, say 2 minutes. Each was set up independent of each other. Will each 
> unit base its time interval on the same clock? In other words will they all 
> try to beacon the same time, every 2 minutes. If this is the case then the 
> offset should take care of this problem...right? We've had some issues with 
> multiple trackers and are working to resolve the problem.
> Thanks, John - N5TIM

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