[time-nuts] Re: Comparison/evaluation of u-blox timing receivers

[Andrew Rodland]

Very interesting.

When I built my Arduino Due-based Rb clock (currently disassembled) around
a NEO-M8T (more specifically, an EVK-M8T), I used the EXTINT to measure the
difference between my onboard PPS and the GPS top-of-second. I ran it
pretty long term without seeing any lost or duplicated TIM-TP messages. Is
it possible that you had some mundane issues with drive levels or coupling,
there?

Andrew KC2G

On Mon, Aug 23, 2021, 9:52 PM John Ackermann N8UR <jra at febo.com> wrote:

> In 2020 I did an extensive evaluation of the timing ability of the
> u-blox LEA-M8F, NEO-M8N, NEO-M8T, NEO-M9N, ZED-F9P, and ZED-F9T.  The
> work was made possible by support from the HamSci consortium
> (https://hamsci.org) under NSF grants supporting HamSci activities.
>
> I was sure I'd posted about the paper on time-nuts, but I can't find any
> record that I did, so this is a belated announcement.  It's available
> for download from
>
>
> https://hamsci.org/sites/default/files/publications/2020_TAPR_DCC/N8UR_GPS_Evaluation_August2020.pdf
>
> As BobC says, "Lots of fun!"
>
> John
>
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