[time-nuts] Can Lady Heather set PC time directly from a TrimbleThunderbolt?

Tim Shoppa tshoppa at gmail.com
Fri Aug 4 15:44:48 EDT 2017

I'm all for building NTPD from source (as a former refclock developer).

But for those not building from source and wanting to install on Windows,
Meinberg NTPD's self-installing package is very easy and does everything

They distribute this for free. I think they've done a great service. And
having real NTPD is so much superior to the many poor quality commercial
programs out there that a newbie might otherwise install.

Tim N3QE

On Fri, Aug 4, 2017 at 2:28 PM, Chris Albertson <albertson.chris at gmail.com>

> On Fri, Aug 4, 2017 at 7:39 AM, Chris Wilson <chris at chriswilson.tv> wrote:
> >
> > Thanks  to  everyone  for the replies, so basically would you say that
> > with  a permanent internet connection I should forget using GPS time to
> > set  the  PC  clock  and  just use Meinberg or NTP (which is what I am
> > currently using and seems to work just fine)?
> You'd be using the same NTP software in either case.  The difference
> is it you were to add a GPS reference clock to the current setup.
> Even with GPS you's till want to keep the internet based reference
> clocks.
> Currently your PC clock might be accurate that the few milliseconds
> level.  Adding a GPS receiver into the mix will improve accuracy to
> the tens of microseconds level.   You'd gain abut two orders of
> magnitude over the current setup.
> Do you need this?  I can think of uses for a highly accurate clock in
> amateur radio.  Perhaps you are measuring propagation delay.  Doing
> this 100 times more accurately might be helpful.    On the other hand
> maybe you only need log files time stamps to be with a second or so of
> correct?     When I got into this may application was pointing
> telescopes and measuring the light from variable stars.    Usually you
> can start with you application and work backwards to place a
> requirement on time accuracy
> On the other hand this is a "time nuts" list and some people here just
> want the BEST they can get.
> I'm not a fan of Meinberg because of the way they market freely
> available software.
> --
> Chris Albertson
> Redondo Beach, California
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