Signal Noise and Distortion (SINAD)

Signal noise and distortion (SINAD) is the reciprocal of THD+N. SINAD takes into account both harmonics and noise.

The following equation yields SINAD:

SINAD= Fundamental+Noise+Distortion Noise+Distortion

You can use SINAD to characterize the performance of FM receivers in terms of sensitivity, adjacent channel selectivity, and alternate channel selectivity.