[ntp:questions] TXCO derived PPS and Atom PPS Clock Discipline driver

Viktar Palstsiuk viktar.palstsiuk at promwad.com
Tue Oct 19 13:00:39 UTC 2010


Everything works after I enabled Orphan Mode with "tos orphan 5" in ntp.conf

---------- Forwarded message ----------
From: Viktar Palstsiuk <viktar.palstsiuk at promwad.com>
Date: Mon, Oct 18, 2010 at 5:52 PM
Subject: Re: [ntp:questions] TXCO derived PPS and Atom PPS Clock
Discipline driver
To: Göran Sandin <gsan.news at mailnull.com>
Cc: questions at lists.ntp.org


I added local clock driver to ntp.conf:

server 127.127.1.0 minpoll 4 maxpoll 4 prefer true

server 127.127.22.0 minpoll 4 maxpoll 4
fudge 127.127.22.0 flag3 1

The result repeats:

# ntpq -p
    remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 LOCAL(0)        .LOCL.           5 l   11   16  377    0.000    0.000   0.008
 PPS(0)          .PPS.            0 l    -   16    0    0.000    0.000   0.000

On Mon, Oct 18, 2010 at 5:19 PM, Göran Sandin <gsan.news at mailnull.com> wrote:
> On 2010-10-18 15:05, Viktar Palstsiuk wrote:
>>
>> Hello
>>
>> I use TXCO derived PPS. I set date and time manually.
>> Is it correct to use Atom PPS Clock Discipline driver with ntp.conf like
>> this:
>>
>> server 127.127.22.0 minpoll 4 maxpoll 4 prefer
>> fudge 127.127.22.0 flag3 1
>
>> But still can not get good PPS(0) status in ntpq -p
>>
>>
>>      remote           refid      st t when poll reach   delay   offset
>>  jitter
>>
>> ==============================================================================
>>  PPS(0)          .PPS.            0 l    -   16    0    0.000    0.000
>> 0.000
>
> Hi Viktar,
>
> as far as I understand, you need another source to provide the time as well.
> "prefer" keyword should be on the other source.
>
> Check this page
> http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver22.html
>
> /Göran
>
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>
>



--
Viktar Palstsiuk



-- 
Viktar Palstsiuk



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