[time-nuts] GPSDO - Does it work?

[Tim Shoppa]

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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