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Re: Clarifications about PPS SHM content
From: |
Martin Boissonneault |
Subject: |
Re: Clarifications about PPS SHM content |
Date: |
Sat, 21 Mar 2020 01:39:41 -0400 |
Hi Gary,
I hope this pic answers your question :
This rPi is unfortunately not dedicated to timekeeping, it also runs ADS-B and
UAT aircraft receivers. I did recompile the kernel to enable 250Hz tick and
force the tick (I don't have my notes ATM), and disabled Energy Efficient
Ethernet.
The precision I have is way above my needs, but if it's worth doing, it's worth
overdoing ;-)
If you think I can improve those figures, ping me privately so I can start a
thread on the ntpsec mailing list.
Thanks,
Martin Boissonneault
address@hidden
Sent from my phone
> On Mar 20, 2020, at 18:03, Gary E. Miller <address@hidden> wrote:
>
> Yo Martin!
>
>> On Fri, 20 Mar 2020 17:35:25 -0400
>> Martin Boissonneault <address@hidden> wrote:
>>
>> I /noselect/ed the GNSS serial refclock. I don't think I can optimize
>> it better on my rPi:
>
> Your mean is good, but without seeing the standard distribution hard
> to say how much better you could get. Getting the last bit of
> accuracyy takes some doing.
>
>> I just wanted to tank you for the help in getting those results. I
>> subscribed to the ntpsec users list, so any further questions about
>> it will be there now.
>
> Cool.
>
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
> address@hidden Tel:+1 541 382 8588
>
> Veritas liberabit vos. -- Quid est veritas?
> "If you can't measure it, you can't improve it." - Lord Kelvin
- Clarifications about PPS SHM content, Martin Boissonneault, 2020/03/19
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/19
- Re: Clarifications about PPS SHM content, Martin Boissonneault, 2020/03/19
- Re: Clarifications about PPS SHM content, Greg Troxel, 2020/03/19
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/19
- Re: Clarifications about PPS SHM content, Martin Boissonneault, 2020/03/20
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/20
- Re: Clarifications about PPS SHM content,
Martin Boissonneault <=
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/22
- Re: Clarifications about PPS SHM content, Martin Boissonneault, 2020/03/23
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/23
- Re: Clarifications about PPS SHM content, Martin Boissonneault, 2020/03/24
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/24
- Re: Clarifications about PPS SHM content, Martin Boissonneault, 2020/03/25
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/25
- Re: Clarifications about PPS SHM content, Martin Boissonneault, 2020/03/25
- Re: Clarifications about PPS SHM content, Gary E. Miller, 2020/03/25
- Re: Clarifications about PPS SHM content, Paul Theodoropoulos, 2020/03/25