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
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