The time has come for me to get an oscilloscope. I have witnessed one being used briefly but a lot of it wasn’t for me to ask questions at the time. So what features are a must for guitar amp and effects pedal work? What am I looking for? I know I want to be able to measure the preclip and clipping wattage (or at least be able to quickly get a reading I can plug into a formula to acquire it) I would like to be able to check for high frequency oscillations that I cannot hear and might burn up an amp over time. I would like to be able to set the trimmers in a phase pedal. Doing it by ear is nice and all, but i would like the option of seeing it too. And I would like to be able to check for noise when probing with a stick that just isn’t loud enough to register to my ears but might be there. Anything else I should want it to do? Audio/freq generation or a separate unite for that? Is all that available with every scope? Ideally my first scope will be cheap and used on Craigslist.