Just wondering if anyone would explain how I could use my arbitrary sig gen to power a small brushed dc motor of approx 100ma current draw ,is it simply a matter of providing a dc waveform and varying the duty cycle or is it the voltage I need to vary to modulate the speed ? I think I saw something about using two channels of a sig gen to power a motor,but im not sure and I dont want to blow the output stage on my gen up , any help greatly appriciated.