[time-nuts] FE-5680A arrived

[Tom Holmes]

You might also consider adding the TAPR Fat PPS to stretch the pulse. See
TAPR.org.

Tom Holmes, N8ZM
Tipp City, OH
EM79


> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of David
> Sent: Wednesday, January 11, 2012 10:17 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] FE-5680A arrived
> 
> On Wed, 11 Jan 2012 08:35:56 -0600, Bob Smither <smither at c-c-i.com>
> wrote:
> 
> >Joseph Gray wrote:
> >> I'm not seeing a PPS on either of these. All I see is about 17 mV P-P
> >> of noise that looks like a multi-stepped sine wave. I'm using a TDS
> >> 340 scope.
> >
> >I can see the 1 usec, 1pps on mine, but only if I use an analog storage
scope.
> >Although my HP54000 series scope triggers at 1PPS, for the life of me I
> >cannot get it to display the 1 usec pulse :-(.
> 
> You might need to darken the oscilloscope environment or use a viewing
hood.
> Some analog non-storage oscilloscopes, either because of design or age,
are not
> going to be able to display a short pulse at 1 second intervals.  I tested
this on my
> old but in good condition 2230 and it could display it dimly in normal
room light but
> my older worn 7603 can not.
> 
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