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Signal to Noise and Distortion (SINAD)

SINAD is a common sensitivity measurement normally associated with FM receivers.  It is an acronym for Signal plus noise and distortion and is equal to (S+N)/N in our system.  It is expressed in dB.  If the signal is much stronger than the noise then SINAD value approaches the SNR value.  Otherwise SINAD will be greater than the SNR.
This utility window can be resized as required by the user and its contents will update anytime a new spectrum is computed.  If the analyzer is configured to display the spectrum of both the left and right channels, this utility window will also show the value for both channels.  The left channel value will appear above the right channel value.

  • Hanning or Blackman smoothing window is recommended because of its low noise quality.  
  • An FFT size of 2048 or greater is recommended in order to to provide adequate spectral resolution.
  • The contents of any open utility window will be printed on the right margin of the spectrum view.

    See Also: SNR, NF