Just for completeness sake, here is a screen capture off of my DSA-602 of the 1pps. Note that the trace starts 500ns _before_ the 1pps triggers the capture. Ah the wonders of digital sampling.
http://www.fastbobs.com/pictures/1pps.jpg Also as a pdf http://www.fastbobs.com/pictures/1pps.pdf Bob On Thu, Feb 2, 2012 at 1:20 PM, John Howell <j...@howell61.f9.co.uk> wrote: > Not odd but my mistake, I took a picture on both 'scopes and the Fluke > gave marginally better results, the text referred to the wrong one. Sorry > for the confusion. > > On 2 Feb 2012, at 16:43, David wrote: > > > Odd. Did Tektronix mark it Fluke PM3082? :) > > > > It is nice to know that the current generation of digital cameras can > > be used for this application. It is too bad that the image has so > > much noise. > > > > On Thu, 2 Feb 2012 16:27:03 +0000, John Howell <j...@howell61.f9.co.uk> > > wrote: > > > >> ........and here's another photo of the pulse from one of the newer > breed of FE-5680A that require the 5V. > >> Taken with a Sony Cybershot H5, 8 sec exposure, 'scope is an elderly > Tektronix 2252 > >> > >> http://dl.dropbox.com/u/1690159/1PPS_1%20FE-5680E.jpg > >> > >> On 2 Feb 2012, at 15:50, Alberto di Bene wrote: > >> > >>> I managed to take a photo at the scope screen showing the 1 pps pulse > >>> from an old FE-5680A (the one that does not need the 5V and does not > >>> output the oscillator signal - just the 1pps). > >>> > >>> Exposure was 30 sec, F9. The signal was barely visible with naked eye, > >>> and some jittering is present. The room of course was in complete > >>> darkness, but the reflex of the stand-by led of another instrument > >>> can be seen... > >>> > >>> http://dl.dropbox.com/u/15089947/1pps.gif > > _______________________________________________ > 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.