[time-nuts] GPSDO - Does it work?

Pete Lancashire pete at petelancashire.com
Tue Jul 16 08:51:18 EDT 2013


Bobble ?
On Jul 15, 2013 6:09 PM, "Tim Shoppa" <tshoppa at gmail.com> wrote:

> Unless your frequency counter has some anti-bobble tricks, you will always
> see +/-1 bobble in the last digit. Of course with longer gates, this last
> +/-1 becomes a smaller fraction of total count.
>
> I personally do not trust a digital meter or counter that doesn't have
> bobble. I naturally think it's stuck unless it bobbles.
>
> Googling "anti bobble" turns up a lot of references to something to do with
> fabric and nothing to do with counters and gates :-).
>
> Tim N3QE
>
>
> On Mon, Jul 15, 2013 at 4:46 PM, Bob Stewart <bob at evoria.net> wrote:
>
> > Hi Mark,
> >
> > I just tried a10 second gate, and it's still the same, though the
> > 4.9999999 happens less often.  Could it be related to the fact that this
> is
> > a TTL signal?  If I don't set the 50 ohm Z button it counts double - i.e.
> > 10MHz.
> >
> > bob
> >
> >
> >
> >
> >
> > >________________________________
> > > From: Mark C. Stephens <marks at non-stop.com.au>
> > >To: Discussion of precise time and frequency measurement <
> > time-nuts at febo.com>
> > >Sent: Monday, July 15, 2013 3:06 PM
> > >Subject: Re: [time-nuts] GPSDO - Does it work?
> > >
> > >
> > >Slow the Gate time down.
> > >
> > >
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