About using w32tm /stripchart and the µs resolution : Despite RFC 1305 compliant, Microsoft w32tm is still bound to the clock interrupt frequency fed to the processor : http://serverfault.com/questions/488983/is-it-viable-to-use-w32tm-stripchart-to-judge-time-variance-of-two-windows-host So if you have a Cs clock as a reference in your computer, or maybe a PTP-based external reference, you might not benefit from the µs resolution....
Chris On Fri, May 24, 2013 at 3:39 AM, Bill Hawkins <b...@iaxs.net> wrote: > Dear me! > > Your clock is off by four years and change! > > Bill Hawkins! > > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Christopher Quarksnow > Sent: Thursday, May 23, 2013 9:06 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Checking Time difference between PCs > > This might do, even though I doubt the routines are using rdtsc to > interpolate nondeterministic offset of the PIC architecture. > > w32tm /stripchart /computer:<target> [/period:<refresh>] [/dataonly] > [/samples:<count>] > > The current time is 3/8/2009 21:05:30 (local time).21:05:30 > d:+00.0000000s o:+00.3047845s > > Cheers, > > Chris > > > On Thu, May 23, 2013 at 5:26 PM, Rex Moncur <rmon...@bigpond.net.au> > wrote: > > > I wonder if anyone has suggestions as to how to check the timing > variations > > between two PCs that are running windows. > > > > The background to this request is that I am running two instances of > the > > Weak Signal Program WSJT on the same computer and get variations of > +/-0.2 > > seconds. It has been suggested that the variations might be caused by > the > > windows operating system. As a check on this I am proposing to run > two PCs > > locked by GPS-18 USB and set by NMEATime which should show the > difference > > on > > WSJT. But is there some program that will show the difference due to > the > > PC > > clocks alone? Or perhaps a program that outputs the PC time as a pulse > on a > > sound card so I can compare these on a CRO. > > > > Regards Rex VK7MO > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.