500c Phase inverter adjustment I have a 500C, and 800C I am doing some FM alignments on. I am also looking to do the phase inverter adjustments. While I don't possess a Distortion meter/analyzer, I do have a very nice dual trace Textronics scope, and a very good Signal Generator. Is there a way I can inject a signal and using the scope, view and adjust the phase inverters for minimal THD?? If there is a way, what frequency or tone should I inject.