Date: Thu, 10 Oct 2002 06:30:32 -0700 From: Gary Thurmond <w6str@.......> Subject: Re: WinSDR Time Add/Drop Mode
Hi Larry,
Sorry about the misunderstanding. I just reread -
/winsdr/dialogboxes.html#System Settings
and get the picture now. I first thought the 4 MHz osc was the time source in
local mode.
It's strange the PC clock (Dallas module) keeps such good time when I'm turn the
PC off and on daily. But when I leave it on continuously, its timekeeping is
poor.
I noticed this before with a QBasic data logging program I wrote for another
project.
All my GPS stuff is up at the new home still in the moving boxes. I'm going up
there soon and will retrieve it. Sure be glad when all the moving is done.
Gary
Larry Cochrane wrote:
> Gary,
>
> The Add/Drop Interval is used to compensate for the oscillator on the A/D
> board being off frequency a little, not the PC's clock. If you use the Local
> Time reference mode you should have your computer synced to a time reference
> using a program like NTP. For everything to work correctly, the PC's time
> must be correct to within a few milliseconds and not jumping around too
> much. If the PC's time is correct and stable the A/D board can use the time
> to correctly calculate the correct Add / Drop interval time and direction
> (add or drop time). Once you add GPS you should not have any problems with
> time keeping.
>
> -Larry
>
> ----- Original Message -----
> From: "Gary Thurmond" <w6str@.......>
> To: <winsdr@..............>
> Sent: Wednesday, October 09, 2002 9:34 PM
> Subject: WinSDR Time Add/Drop Mode
>
> > My WinSDR & PC timing in local mode is running fast about 1 second in
> > 1300.
> > Setting the 1 mSec Add/Drop Interval to 00:00:01.300 and Mode= Drop has
> > had no effect.
> > Thinking this may require a restart of WinSDR, I did that and still no
> > change of the WinSDR time running fast about the same rate.
> > PC time stays the same as the WinSDR time.
> > The PC mother board clock is a Dallas Semi module that has normally run
> > about 5 seconds slow/month before running WinSDR.
> > I'll be adding GPS to the system in a few weeks, but until then I would
> > like to use the time correction feature.
> >
> > Is there something else in the configuration that has to be set?
> >
> > Gary
> >
> >
> >
> >
> >
> >
> >
> >
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