[ntp:questions] help with setting up NTP on windows with a USB GPS

jack j.jack.wang at gmail.com
Mon Nov 30 15:51:29 UTC 2009


New problem:

NTP wouldn't start automatically. The system event log shows that NTP
service was started repeatedly (I configured it so it restarts after
initial failure) but it shuts down itself (message: NTP service is
stopping with no message wrt why). It would stop if I start it
manually. However, it will run if I open the serial port with
Hyperterminal and the close it without doing anything else).  I am
very puzzled.

jack

On Nov 30, 10:25 am, jack <j.jack.w... at gmail.com> wrote:
> RGB:
>
> I tried the serial port on my B&B serial board and the 1PPS signal is
> not detected. I don't how how serialpps.sys sees the signal and am
> thinking the DCD signal is not sent over the PCI bus.
>
> jack
>
> On Nov 30, 9:56 am, jack <j.jack.w... at gmail.com> wrote:
>
>
>
> > On Nov 28, 1:51 am, "David J Taylor" <david-tay... at blueyonder.not-this-
>
> > bit.nor-this-part.co.uk.invalid> wrote:
> > > "jack" <> wrote in message
>
> > >news:484bcf3e-dde5-4978-966d-5637918c913f at l35g2000vba.googlegroups.com...
>
> > > > David,
>
> > > > Would you mind looking up the model number of the Sitecom serial to
> > > > USB converter that has the DCD line? I am very interested in a
> > > > solution like that.
>
> > > > Jack
>
> > > Jack, the convertor I had was Sitecom DK01 USB dock from 2002.  It's no
> > > longer available new.
>
> > > Cheers,
> > > David
>
> > Thank you, David. You're very helpful!
>
> > I ran both my setups over the weekend. The GPS with 1PPS has the worst
> > offset of 200us and the GPS without jumped up to 80ms, clearly due to
> > loss of satellite signals. I am happy with the performance of the GPS
> > with 1PPS out.
>
> > RGB: I have a similar PCI-serial card in my computer. I will try my
> > GPS with this board and let you know the results.
>
> > Jack




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