On 07/03/2011 09:37 PM, Tom Van Baak wrote:
Note looking for a sample 990 to 1010 milliseconds from the last
sample is a nice way get 1PPS from 60 Hz. This is more immune
to noise than traditional division-by-60 techniques.
As it turns out, I've gotten clean 1PPS data with no h/w or s/w
filtering so maybe this whole noise concern is overblown.
You still to time-gating, which in itself is a filtering technique...
which works very well for known frequency signals.
It can be used in various ways, but it has proven itself useful.
Cheers,
Magnus
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