Keysight U8903A User Manual

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Keysight U8903A User Manual Manual pdf 120 page image

5 Audio Analyzer Measurement Functions120 Keysight U8903A User’s GuideThe THD + N Ratio measurement is shown as follows.Figure 5-8 THD + N Ratio measurementSINADSIgnal, Noise, And Distortion (SINAD) is equal to the reciprocal of the distortionmeasurement. It is mostly used to determine the sensitivity of a communicationsreceiver. The ratio computed in the SINAD measurement is shown as follows.SINAD is expressed in dB (default) or as a percentage.SINAD = 20 log rms value of signal, noise, and distortionrms value of noise and distortion------------------------------------------------------------------( )