Klirrfaktormesser (Oberwellenfilter, Audio)

The standard method of measuring the har- monic distortion of an amplifier is to feed the amplifier with a pure sinew ave signal and to feed the distorted signal from the ampli- fier output into a notch filter which rejects the fundamental, leaving only the harmonic distortion products introduced by the ampli- fier, which can then be measured or exam- ined on an oscilloscope.