PWM simulation in FM

start by initiating the edit buffer, turn on operator F to 100 (into the OUT) with a square wave (ie wave 4), modulated by E by about 55 using wave 27 (TX Wave 3) . Set LFO1 rate to about 10, and turn the junction to 100 between LFO1 and E in the Modulation Matrix. give a pretty good PWM simulation using just 2 operators.