In SX Microcontrollers, SX/B Compiler and SX-Key Tool, metron9 wrote:

If I showed you the full plot you would see varing voltages on the peaks and valleys of the clock wave in the above picture. A 100 mhz scope on a 50mhz clock can only plot 1 point for high and one point for low so that's where I was thinking the Nyquist theorem comes in.  No way to see the actual square wave without a faster scope because you need more points in the measurement. I really thought that was the crux of the theorem. i shall have to read it again.

50 mhz is 50 million cycles so the transition from high to low is only 10ns and the transition from low to high is 10ns, true it is measureing 50mhz and I see the output on the scope but a 100mhz clock cycle I dont think I could see on a 100mhz scope.

I have an 80mhz oscillator I can plug that in to see.

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