Hi The whole dead zone / interaction thing is as much layout dependent as it is circuit related. Even the guys at HP / Agilent / Keysight seem to struggle on and on with this. The 10 MHz input to the clock system has created issues for a *long* time.
Bob > On Feb 1, 2022, at 9:30 AM, Erik Kaashoek <e...@kaashoek.com> wrote: > > Bob, > Thanks for the feedback, always welcome. > > I recognize HW is an important topic that requires a lot of attention. > > With respect to the harmonic interaction. How "close" do you think the input > and the clock need to be for the interaction to start? With a 200MHz clock, > does that leave some space for low frequencies (but not so low it does not > matter anymore) to move the clock away from the danger zone? > Erik > On 1-2-2022 14:50, Bob kb8tq wrote: >> Hi >> >> The main point about “added hardware” is that this *is* how a counter >> gets from the numbers I mentioned to performance that is better than >> that. It’s not done by running some magic math that somehow improves >> a basic sampling counter by a couple orders of magnitude. >> >> Since that hardware is off topic, I suspect that’s as far as this needs to >> go. >> >> The dead band issue can come from a variety of interactions. There pretty >> much is *always* going to be some harmonic of the signal that hits some >> harmonic of the clock. The best you can do is hope that both are high enough >> that the interaction is not a big deal. >> >> Bob >> > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
