[time-nuts] FE-5680A arrived
albertson.chris at gmail.com
Thu Jan 12 23:08:39 EST 2012
On Thu, Jan 12, 2012 at 6:09 PM, <EWKehren at aol.com> wrote:
> How are you going to measure and adjust and to what level. What error can
> you live with?
What error? I'd say one DDS step. The steps are in units of about
5.6E-13 so the max error is 1/2 of that.
How long to measure. The PPS will be random the worst case will be
that it is 30 seconds off. That could take a LONG time. I think it
is best simply to measure the PPS offset from UTC and leave it. Just
get the 10MHz right and the PPS will keep a constant known offset.
Any timing application will have a way to enter the offset.
If you really do want to move the phase of the PPS. I think a fast
way might be to turn the FE5680 off then back on, repute until you get
Redondo Beach, California
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