[time-nuts] Checking Time difference between PCs

Bill Hawkins bill at iaxs.net
Fri May 24 03:39:16 EDT 2013


Dear me!

Your clock is off by four years and change!

Bill Hawkins!
 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at 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 <rmoncur at 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
>
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