NTP ST1 server in my house

[Mori Hiroki]

Hi

ST1 GPS jitter is always 15us.

This cause of CPU clock 320MHz.

Offset is under 10us.

I think more good accuracy by pps manipulate by FPGA. 

Who is makeing this ?

Hiroki Mori

----- Original Message -----
> From: Mori Hiroki <yamori813 at yahoo.co.jp>
> To: "freebsd-mips at freebsd.org" <freebsd-mips at freebsd.org>
> Cc: 
> Date: 2019/8/20, Tue 20:52
> Subject: NTP ST1 server in my house
> 
> Hi
> 
> I have four NTP ST1 server in my house.
> 
> All server use RT3050.
> 
> Two is GPS and Two is radio signal JJY.
> 
> GPS is u-blox and Taiyoyuden(chip is Mediatek).
> 
> This is ST2 ntpq.
> 
>      remote           refid      st t when poll reach   delay   offset  jitter
> ==============================================================================
> *10.0.1.22       .GPS.            1 u  637 1024  377    0.961    0.317   0.940
> +10.0.1.20       .GPS.            1 u  688 1024  377    1.013    0.348   0.956
> -10.0.1.19       .JJY.            1 u  709 1024  377    0.968    4.092   0.995
> +10.0.1.8        .JJY.            1 u  686 1024  377    0.969    0.233   0.716
> 
> GPS is gpiopps on mediatek gpio v1.
> 
> http://dmesgd.nycbug.org/index.cgi?do=view&id=5092
> 
> 
> About over one year no trouble.
> 
> Hiroki Mori
> 
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