REW 3.40 beta57 RTA noise level

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Feb 8, 2018
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286
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Italy
I have verified a difference in the noise level when enabling the THD measurement with the average function active.
I attach two RTA screens with a 1 Khz -4dbfs signal, the first with the THD measurement and the second without, you can see a notable difference in the noise level which is much lower when the THD measurement is active.

Is this normal behavior?

Thanks, regards.

Antonio
 

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