[time-nuts] Timing between two GPS PPS outputs.

[Gabs Ricalde]

David,

Thanks for the update. The spikes I'm experiencing coincides with the
time when there are 3 or less visible satellites, as predicted by the
Trimble Planning software.

On Mon, Jan 7, 2013 at 8:02 PM, David J Taylor
<david-taylor at blueyonder.co.uk> wrote:
> From: Gabs Ricalde
> []
> Non-timing receivers could be unsuitable for your requirements, as
> some of us have discovered:
> http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html#oscillations
> []
> =======================
>
> Gabs,
>
> The oscillations I reported are not due to the use of a navigation GPS
> receiver.  I have discovered one other difference between the two Raspberry
> Pi PCs - firmware version.  I upgraded the PC with the oscillation from
> version 337601 to version 346337 firmware and this appears to have resolved
> the issue.  Fingers crossed!  Once things have stabilised, you will find a
> comparison between navigation (RasPi #1, MTK3339 Adafruit) and timing (RasPi
> #2, Trimble Resolution SMT) receivers here:
>
>  http://www.satsignal.eu/mrtg/performance_ntp-pn.php
>
>
> Cheers,
> David
> --
> SatSignal Software - Quality software written to your requirements
> Web: http://www.satsignal.eu
> Email: david-taylor at blueyonder.co.uk
>
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