[time-nuts] Cheap jitter measurements
Gary E. Miller
gem at rellim.com
Wed Apr 25 18:10:56 UTC 2018
Tom!
On Wed, 25 Apr 2018 04:01:10 -0700
"Tom Van Baak" <tvb at LeapSecond.com> wrote:
> Hi Gary,
>
> > A little coding later and there are nice plots. They were compared
> > to the output of tvb's adev.c program. Results are similar.
>
> Whoa there cowboy. That doesn't mean it's right. Comments:
It would not be time nuts if I did not get my head handed back to me
on a platter right away. :-)
Much to ponder. Thanks much for the feedback.
As requested, here is my raw data: http://pi5.rellim.com/1d.log.gz
chA is the JL. chB is the u-blox. 24 hours of data.
> I strongly, pretty please, strongly advise you to use TimeLab for a
> while before you roll your own tools and plots.
I'd love to use TimeLab, or Stable32. But they seem to be closed source,
and only run on Windows. I have not done Windows since 2000. Any
suggestions for something open source and POSIX compatible? Ideally
something that runs well on a RasPi.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
gem at rellim.com Tel:+1 541 382 8588
Veritas liberabit vos. -- Quid est veritas?
"If you can’t measure it, you can’t improve it." - Lord Kelvin
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