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[aprssig] Clock/timing accuracy when generating an APRS signal

Scott Miller scott at opentrac.org
Wed Nov 2 22:38:18 UTC 2011

> What typical errors can I get away with for most receivers if any? I
> assume I am right in my assessment and it is not a slight change in
> ratios between different timings that effected it. Changing to an
> accurate clock meant changing clock speed, so recalculating delays, so
> different rounding errors.

I had trouble with a timing error of 1 part in 128 in the first 
OpenTracker.  I would definitely keep it within 0.5%.


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