Hi Didier, You showed the effect of standard end-termination and no end-termination both while driving the cable with a mis-matched low signal source impedance. These are the same type of plots that Tom posted a link to last week.
The interesting plots will be when you set R1 to match the cable impedance and then vary R2. Bye, Said Sent From iPhone > On Sep 18, 2014, at 3:41, Didier <shali...@gmail.com> wrote: > > Hi Tom, > > This page will show you the kind of problems to expect: > > http://ko4bb.com/Test_Equipment/CoaxCableMatching.php > > Didier KO4BB > >> On September 15, 2014 8:43:21 AM CDT, Tom Van Baak <t...@leapsecond.com> >> wrote: >> How important are all these cable / termination / impedance issues for >> 1PPS signals? I know ringing and reflections are undesirable in many >> applications. But for 1PPS? >> >> I often use pick whatever cable, termination, and trigger level gives >> the cleanest edge, the best risetime. What happens to the signal tens >> or hundreds of nanoseconds after the edge seems irrelevant to me. Could >> one of you RF experts comment? >> >> /tvb >> >> _______________________________________________ >> 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. > > -- > Sent from my Nexus 7 tablet. > _______________________________________________ > 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.