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-boun...@febo.com [mailto:time-nuts-boun...@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 <smit...@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. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.