I have a Rigol DS1102E. I know that some DSO have a "time track" feature that allow you to demodulate and plot the RMS value of a PWM signal with respect to time on a cycle-by-cycle basis for e.g. tuning control loops.
I don't immediately see a feature like that available on this scope, is there a way to coax it into providing similar info that would be valuable for that task using any of the other math and/or plotting features it does have?