[time-nuts] Re: FPGA-based GPS NTP server project

[Bob kb8tq]

Hi

If you want to get the short term jitter down to around a second or so, 
set it up with a GPS module that puts out a sawtooth correction. You 
also need to get the Arty A7 measuring at the 1 ns level. That’s do-able
without insane amounts of effort. 

Bob

> On Feb 11, 2023, at 4:09 AM, HÃ¥kan T Johansson via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> 
> Hi,
> 
> I have a NTP server project based on a Digilent Arty A7 FPGA board with a MediaTek GPS MT3329.  Board-to-board NTP tests over network show about 20 ns jitter, with long-term wanders of 100 ns, presumably due to my limited sky-view.  More details:
> 
> http://fy.chalmers.se/~f96hajo/fakernet/board_Arty_A7-35-GPS-NTP.html
> 
> Cheers,
> HÃ¥kan
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