[time-nuts] Soekris without a GPS receiver.

[Paul]

On Sun, Dec 28, 2014 at 2:16 AM, David J Taylor <
david-taylor at blueyonder.co.uk> wrote:

> No, I haven't replaced the crystal.  I was hoping to see how well it
> worked without.
>

No better than any other system given similar environments.


> Would it work any better than the Raspberry Pi cards I am using today
>

There are two functions:
1) The very high resolution discipline of the system clock.  Doing this
today one would use a capture or system that can be externally clocked.
2) Time transfer.  That's not going to be any better than any other non-PTP
system.  The limitation is the network not the server.

So the answer to the "better than" question is probably not enough to
matter.  Either in offset or jitter.


> (which seem considerably worse with the new tickless kernel than the
> self-compiled non-tickless one I was using before)?
>

Implementation issues.


>   Would it work better than a server running Linux?
>

No.


>   The net4501 had a good reputation in its time.
>

But not for reasons recently discussed on ntp:questions.  See item 2 above.


> The non-standard implementation of NTPns is putting me off.
>

I don't believe NTPns is better enough at timekeeping to fret about.

I've avoided asking why you're doing this because -- to misquote Yoda --
"Do nor do not, there is only try"  But if you're not switching out the
system clock it doesn't really seem like either a time-nut or ntp-nut
project.