Jay P.

Unfortunately, reducing the channel Range and Bottom in the FFT view wоuld not change the Amplitude and Peak2Peak in the Oscilloscope view. ☹️

I cannot leave it at !X because the signal is too small for 1X and it's buried in noise. I can only see the signal when I lower the Attenuation. The noise floor is too high for 1X it is around –40 dBV.

attila, thank you very much, but my signal is not amplified nor attenuated. Isn't there a way to display its correct Amplitude and Peak2Peak when Attenuation is changed??? You are probably thinking about a probe with attenuation, and Attenuation in Waveforms is compensating for it, but I'm not using a probe — I am simply passing a low-voltage signal and I need its Amplitude to display correctly.

You problem is right here staring at you: your signal appears 10,000 smaller because you changed the Attenuation:

attila, this is not a capture, this is a free-running signal, and even an hour later the measurements are still incorrect. You guys clearly have a problem here: the measurements must be scaled accordingly with the Attenuation. Please, instruct clearly what needs to be done to scale the measurements by the same factor as the Attenuation.

attila, thank you, but my question was about the scaling, not Peak2Peak.

WaveForms' Measurements are all wrong when Attenuation is changed from 1X. Thus, in the attached screenshot, changing the Attenuation to 100 uX should have automatically scaled the Amplitude and Peak2Peak up by a factor of 10,000. This is not the case: the Amplitude should be around 167 uV, and Peak2Peak twice that number (is that twice? No, it's 10 times the Amplitude!).