Yes simply set both channels to GND and defocus the spot. That way you won't burn-in the screen.
Albert
---In TekScopes@..., <kcrossett@...> wrote :
Ah. I think I understand. Do I need to inject a signal, say from a small
signal generator that outputs a dirty square wave, or can I do it simply by
turning on the scope, defocusing the spot and manipulating the horz control
while measuring the voltage on the two test points?
