[ntp:questions] Re: Everything works! -- but am I doing more than I need to?

Piotr Trojanek ptrojane at mion.elka.pw.edu.pl
Wed Nov 26 10:22:37 UTC 2003

On 2003-11-26, Terje Mathisen <terje.mathisen at hda.hydro.com> wrote:
> John Ackermann N8UR wrote:
>> Here's the operative part of my /etc/ntp.conf file:
>>     pps /dev/oncore.pps.0 assert hardpps
>>     server prefer
>>     fudge flag3 1

"flag3 1" is equal to "HARDPPS" in /etc/ntp.oncore.0

> That's strange, since I've nver even tried to use the PPS signal both 
> for ONCORE and ATOM at the same time. I didn't even believe it would 
> work. :-)

it works:-) both in kernel HARDPPS and when PPS is handled from ntpd.

OnCore does use PPS to timestamp each message, which comes from serial
port -- without this there would be VERY poor accuracy from only serial

when you use ONCORE and ATOM, ONCORE as preffered peer tells NTPD when
to turn on/off kernel hardpps.

Piotr Trojanek

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