Re: [Linuxptp-users] Fwd: Installation of Linuxptp on Ubuntu PC

[Richard C. <ric...@gm...>]

On Sun, Aug 30, 2015 at 10:28:15PM +0100, Guo Hao wrote:
> Hence the working principle would be as:
> 1. The Endace card might get the ToD second (from NTP or PTP) before the
> accurate 1-PPS or after the 1-PPS
> 2. If the ToD second comes first then 1-PPS comes later, Endace card would
> record the ToD second and match that second to the moment when it really
> receives the 1-PPS.
> 3. If the 1-PPS comes first and ToD second comes later, Endace card would
> add some offset to the ToD second to make that align to the 1-PPS.
> 
> Is my understanding correct or not?

Yes, I think so.

> Still not that clear on how the Endace card coordinate NTP ToD with PPS and
> can you give more clues?

You can always ask Endace how their card works...

Thanks,
Richard