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Spectrum analyzer noise correction factor

Question asked by Leyo on Mar 6, 2013
Latest reply on Mar 8, 2013 by tabbott
Hello, 
The attached plot shows the  correction factor to account for the noise contribution of Spectrum analyzer vs the Signal to noise ratio. For example when  the S/N is 10 dB, the contribution of analyzer noise is around 0.46 dB. I think the plot is   for the RMS detector operation. Could you please  help me figure how the equation  for this plot is derived? 
Appreciate your help.  

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