jack <[email protected]> writes: >Hi everyone,
>First of all, I thank you for all your response. >I understand the best solution would be using an IRIG board and that's >what we had been using. We are now trying to make our product more >compact by using a small single board PC with no RS 232 or PCI slot >(no slot at all). Currently I am using GPS antenna with a USB >connection. >I also understand that if I can get a small PC with one genuine RS232, >I can use Dave Hart's solution as tested by David. I will try to my >best to steer the project towards this direction. >Right now, I am trying to find the best GPS antenna that outputs at a >consistent pace (better if the output can be configured so I only >receive time stamps). Any recommendations wrt that? Not at all sure what you mean. IF you do not use the PPS output, you will never get timing better than a few ms. Not at all sure what :consistant pace" means. And from what I have read, USB itself has its own variability. Ie, you cannot get consistant output from a USB port, no matter what receiver you use. It is like giving your secretary a highly accurate deskclock, and then getting the time by telling her to read it and walk over to your office on another floor to tell you the time. >Thanks again. >Jack >On Mar 10, 4:59=A0am, Martin Burnicki <[email protected]> >wrote: >> Jack, >> >> jack wrote: >> > Hi all, >> >> > I am trying to sync my Windows box to an external GPS source. I >> > currently have BU353, whose output is not very periodic. I read up on >> > ntpd implementation that uses PPS signal but I don't even have an RS >> > 232 port on my computer. >> >> > My questions: >> > 1) what's the best GPS antenna (and protocol) in terms of >> > consistencies in its output? >> > 2) what kind of accuracy can i expect? >> >> This is somewhat limited under Windows due to the granularity of the Wind= >ows >> system clock. >> >> Alternatively you could install a GPS PCI card which your applications ca= >n >> also access directly, so you can benefit from the full accuracy of the >> card, e.g.:http://www.meinberg.de/english/products/gps170pex.htm >> >> Take care, though, I'm biased! =A0;-)) >> >> Martin >> -- >> Martin Burnicki >> >> Meinberg Funkuhren >> Bad Pyrmont >> Germany _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
