Yes, they are both set to "positive". Leaving the start at "pos" and switching the stop to "neg" gives 66 ns. One more observation, which probably does make sense: If I set the ARming to +/-TI and toggle the Period Complement the "sum" is always very close to 100ns: 15 is complemented by -85 and 66 by -34. All this is for Trigger Levels at Preset.
When I "tune" the levels to get 100 ns at +TI and then switch to +/-TI I get around 20 ps, and the Complement button has no effect on this. On Sat, Jul 1, 2017 at 9:38 PM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: > -------- > In message <CAOT1cQJ4K8uyNvFp8AjoLGjd57Pm31LnZT_jRo44J4Zhesvgzg@mail. > gmail.com>, Thomas Allgeier writes: > > >Going through the motions of measuring TI with it's own 10MHz ref as input > >(as described in the manual) I don't get 100 ns, but around 15 ns. So this > >is with the switch set to START COM. Oddly enough I get the same 15 ns > with > >the switch set to SEP, and going through a 6 ft cable between start and > >stop. > > Have you checked the trigger polarities ? > > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > p...@freebsd.org | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ 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.