[time-nuts] Enhancing the TIC232 code for better data
glenn at net127.com
Sun Aug 13 15:05:28 EDT 2006
Didier Juges wrote:
>Second thoughts about inverting the UTC 1PPS. I have read in a previous
>post that for most GPS receivers, only the leading edge of the 1PPS
>pulse is tightly controlled (and intended to be synchronous with the
>satellite signal), the falling edge is not. If this is true, we want to
>make sure we keep that edge the way it is and then invert the 1PPS from
>the DUT, if this is possible.
FYI- according to the engineering note on the Oncore UT+ the 1 PPS is
200ms long +/- 1ms. You could have the GPS unit offset the 1 PPS by 500ms.
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