and there's usually more than 1 or 2 solutions
I have no knowledge of any solution that will work without even a minuscule error other than hardware that is fast enough to keep track with the fastest pulses coming during oscillations. You will find many "solutions" that seem to work and then one day you are a count off. Solutions such as Peters are OK if you can tolerate a small error, if you can not the hardware is the only one.


Could you just -list- all you have tried
I did not try any, that would be foolish since testing does not "prove" diddlysquat. I went through a theoritical analysis of what would/could happen with filtering, reduced response time etc and realized that a device that was fast enough to respond to the fastest pulses appearing during oscillations would be the only reliable way to treat it.

Every time this issue is discussed all kinds of "simple" so called solutions come up and - invariably - the fast response end up being implemented. If you look at the microchip solution, you will see it exactly the same as Agilent - and I - apply. Do you really believe that microchip would have designed the hardware quad det if the uC could have handled it reliably?

Erik