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Re: [gpsd-dev] A detail in your ntpoffset script
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] A detail in your ntpoffset script |
Date: |
Wed, 23 Oct 2013 13:14:56 -0700 |
Yo Dave!
On Wed, 23 Oct 2013 13:09:06 -0700
Dave Platt <address@hidden> wrote:
> > I see where you are going. But I have gottent tow PPS to agree to
> > better than 1 uSec so I do not think it is a measurement error on
> > my part.
> >
> > The error is attached to the GPS, not to the port or host I conenct
> > it to. So it is a characteristic of the GPS, not the measurement
> > techniwue.
>
> It would be interesting to measure the electrical offset by a separate
> technique which is completely independent of the host interface
> timing.
Been there, do that with my trusty Tek scope. 1.5 uSec.
> Won't work with USB-output-only GPS'es, of course.
Of course. 3 orders of magnitude difference.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
address@hidden Tel:+1(541)382-8588
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- Re: [gpsd-dev] A detail in your ntpoffset script, (continued)
- Re: [gpsd-dev] A detail in your ntpoffset script, Gary E. Miller, 2013/10/22
- Re: [gpsd-dev] A detail in your ntpoffset script, Eric S. Raymond, 2013/10/22
- Re: [gpsd-dev] A detail in your ntpoffset script, Hal Murray, 2013/10/23
- Re: [gpsd-dev] A detail in your ntpoffset script, Gary E. Miller, 2013/10/23
- Re: [gpsd-dev] A detail in your ntpoffset script, Dave Platt, 2013/10/23
- Re: [gpsd-dev] A detail in your ntpoffset script,
Gary E. Miller <=
- Re: [gpsd-dev] A detail in your ntpoffset script, Eric S. Raymond, 2013/10/23
- Re: [gpsd-dev] A detail in your ntpoffset script, Harlan Stenn, 2013/10/23
- Re: [gpsd-dev] A detail in your ntpoffset script, Harlan Stenn, 2013/10/23
- Re: [gpsd-dev] A detail in your ntpoffset script, Gary E. Miller, 2013/10/23
- Re: [gpsd-dev] A detail in your ntpoffset script, Sanjeev Gupta, 2013/10/24
Re: [gpsd-dev] A detail in your ntpoffset script, Andy Walls, 2013/10/22