total harmonic distortion (THD)


total harmonic distortion (THD): Of a signal, the ratio of (a) the sum of the powers of all harmonic frequencies above the fundamental frequency to (b) the power of the fundamental frequency. Note 1: The THD is usually expressed in dB. Note 2: Measurements for calculating the THD are made at the output of a device under specified conditions. (188)


This HTML version of FS-1037C was last generated on Fri Aug 23 00:22:38 MDT 1996