[ntp:questions] Acutime Gold

Mark C. Stephens marks at non-stop.com.au
Fri Aug 16 01:27:15 UTC 2013

If I have palisade prefer PPS comes up fine within a minute or so.
When I tried making pps prefer it got an x beside the PPS.
I waited for an hour or 2 but it was still marked bad.
Not sure what's going on there..

this is the relevant part of the config:

server minpoll 4 maxpoll 4 # prefer # noselect
fudge flag2 0 flag3 1 flag4 0 # time1 0.000016

# palisade on ttyS0
server minpoll 4 maxpoll 4 prefer
fudge flag2 0 # time1 0.000015

As you can see I have tried different time1 for both clocks.

I am not familiar with the mindist option.
Will go check it out.

I'll wait until the jitter settles down and post the offset.

-----Original Message-----
From: questions-bounces+marks=non-stop.com.au at lists.ntp.org [mailto:questions-bounces+marks=non-stop.com.au at lists.ntp.org] On Behalf Of E-Mail Sent to this address will be added to the BlackLists
Sent: Friday, 16 August 2013 6:59 AM
To: questions at lists.ntp.org
Subject: Re: [ntp:questions] Acutime Gold

Mark C. Stephens wrote:
> remote           refid  st t when poll reach  delay   offset  jitter
> ====================================================================
> oPPS(0)          .PPS.   0 l    4   16  377   0.000   -0.003   0.005
> *GPS_PALISADE(0) .GPS.   0 l    4   16  377   0.000    0.014   0.002
> For the above wouldn't I need to advance PPS by time1 0.003?

I don't think so.

> And retard the palisade by time1 -0.014?
> Assuming these are the average values.
> Because I tried those values and the PPS got marked bad ticker and the 
> palisade  was unreachable!

AFAIK, the way most people do it, is to have several refclocks / servers,  and change to noselect, the one you want to check the serial end  of line offset; let it run for a day or two, and take the average.

According to the driver doc,
 a serial end of line time1 offset of around 20ms is common.

You might also need to increase the mindist.

You might also want to prefer the PPS.

E-Mail Sent to this address <BlackList at Anitech-Systems.com>
  will be added to the BlackLists.

questions mailing list
questions at lists.ntp.org

More information about the questions mailing list