[time-nuts] Sawtooth Error Correction, WAS: Capturing NMEA and TICC timestamp data in time-correlated way?

[Dana Whitlow]

Assuming that the T'bird works as you stated, you might still want to know
where in that
sawtooth the supposedly "fixed" error falls.  Maybe this is unimportant if
all you want is a
stable reference frequency source, or very important if you actually want
to know what
time it is.  However, the always somewhat noisy phase lock means that the
"fixed" error
is not constant, merely less variable than otherwise.  What I don't know is
whether or
not the hardware can even be aware of this variability- I kind of suspect
not.

Dana


On Sun, Sep 15, 2019 at 11:03 AM Alberto di Bene <dibene at usa.net> wrote:

> On 2019-09-15 14:12, Forrest Christian (List Account) wrote:
>
> > Most GPS receivers with 1PPS outputs are only able to align the 1PPS to
> the
> > nearest edge of some internal clock.   In addition, in most GPS
> receivers,
> > that internal clock is not synchronized to the 1PPS signal in any way.
>
> Am I right in saying that the Trimble Thunderbolt should not require any
> sawtooth error correction, as the processor
> clock is the same 10 MHz crystal that is disciplined by the GPS signal ?
> Or something is escaping me (it happened
> before...) ?
>
> 73  Alberto  I2PHD
>
>
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