On Mar 18, 8:56 pm, "Richard B. Gilbert" <[email protected]> wrote: > Towli wrote: > > Hi > > > I would like to test my internal clock (from my domain pc) against a > > public ntp server, to see if there is a discrepance (i suspect our > > domain time is not synchronised properly). > > Is there a way to do this? > > You can install ntpd and/or ntpdate. Ntpdate will either set your clock > or tell you how far off it is, depending on the options you select. > Ntpdate is deprecated.
Moreover, ntpdate on Windows is near-useless as it is working with a 15-ms precision OS clock directly. ntpd synthesizes a timeline using counters on top of the OS time and is much more accurate as a result. Of course, w32time is currently setting your domain PC's time and its also using the limited OS clock. > Ntpd will discipline your clock so that it synchronizes with your > selected time source(s). > > Meinberg Funkuhren offers a pre-built ntpd for Windows together with a > Windows "installer". Our Meinberg contact is "Martin Burnicki" > <[email protected]> I think Martin's coworker Heiko Gerstung does most of the Meinberg installer work. For the OPs question of comparing his domain PC to external NTP servers, obviously he's going to need access to UDP/123 to get anywhere as noted. Once that's working, a relatively easy way to compare is to setup ntpd with a few sources and enable loopstats log generation. Note only one of w32time and ntpd can be active on a given machine because they both want to listen to UDP/123 exclusively. Meinberg's installer will disable w32time by default, I'd suggest letting it do so. Once you have a working ntpd, stop and disable the NTP service and enable and start Windows Time service (w32time). Come back in a day and reverse the procedure to switch back to ntpd, and pay attention to the initial loopstats entries to get an idea of how far off your PC's time is from your selected sources. Cheers, Dave Hart _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
