Hi The "gotcha" with a public grandmaster is routing to it. Without 1588 routers / hubs / switches / what ever, the result is compromised. You fall back into the same routing delay mess as NTP. Since public pretty much means internet accessible, you would need to upgrade a lot of stuff. Since that includes the traditional "last mile" gear, it's not a simple proposition at all. At least in my case, I get more delay from the ends of most connections than I get from all the routing in-between.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Azelio Boriani Sent: Wednesday, February 01, 2012 9:21 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] IEEE1588 Interesting: a sort of public grandmaster. I don't think there are any available. I have attended an Oscilloquartz's live meeting on IEEE1588 and, of course, they have shown their expensive production but, in general, it should be useful to find public grandmasters to test with. On Wed, Feb 1, 2012 at 3:09 PM, Daniel Mendes <[email protected]> wrote: > All this talk about microcontrollers and IEEE1588 made me get out of the > shadow to ask: > > 1) Are you talking about IEEE1588-2002 or IEEE1588-2008? The former has no > use to me, but the later could replace some GPSs in a system i´m > designing... > > 2) If you intend to play with IEEE1588-2008, do you know any affordable > source of data? (I think they call them grandmasters or something like > that). > > Thanks > > Daniel > > > > > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/tim e-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
