I'm not saying to you J57ltr, but for others that want to use an o-scope: Be careful how you hook it up! If you hook the ESC to a bench power supply, you MUST use both traces of the o-scope! Hooking the o-scope ground to any of the motor wires will most likely end up with a blown ground trace on your scope! If using a battery to power the ESC, you can use the scope ground if you want.