[sdiy] "spiral" waveforms

[Byron G. Jacquot]

> >Am I the only person who knocks the scope into X-Y mode form time to
> >time, just to see what pops up?
> 
> Neither of my scopes have the ability, which surprised me.

For the longest time, I thought my scope couldn't do it, because 
there's wasn't a separate switch or button marked "X-Y" or 
"Lissajous" or whatever.  It turns out that if I turn up the time 
scale all the way, suddenly channel 2 becomes the time reference...

Byron