Ahh Thanks Steve for clearing that up.

As you say, these AC excited sensors are difficult to capture in a way that allows you to draw a conclusion. It can be done, but I have to accept that it takes some perseverance (or nerdy-ness)

The difference between a good signal & a corrupt one is can be very subtle to spot & the conventional cam crank alignment that we like to look for in a scope capture, is only obtainable with considerable buggering about (to put it mildly)

I wonder what the solution is in this case? Come on George, don't give up!

Cheers

Dave