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.

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.

The equation that fits the curve you are seeing is:

Error = 10*log (1 – 10^(-SNR/10))

Where SNR is the Signal to Noise Ratio and Error is the correction that should be applied to the displayed value on the analyzer.

The equation does not depend upon the detector selected.

Regards -