distortion

Hello John, First of all thank you for making REW and all that it makes possible. I am currently using REW for distortion measurements of a DIY 100W power amplifier, with the usual idea to make it as quiet and distortion less as possible. Currently I am measuring around 0.00015% distortion...

I've read about a few methods to calculate THD based of IEC or IEEE. Is REW calculating THD relative to the fundamental only or fundamental + harmonics?

Hello, I am quite a newbie using REW and I am trying to understand why the curve shown in distortion feature after performing a sweep measurement does not match the values displayed in the table below? This is happening for THD. As a bit of background, I am using REW to measure the response of...

In Generator the output at -3dBFS of Pink Noise (Full range) is too high and there is a great distortion/overdrive. Has anyone encountered this problem? REW 5.18 Windows 10

I noticed that the SPL level in the SPL window and in the Distortion window are not alike. The SPL window shows higher dB values - 10dB or more - than the fundamental in the Distortion window. What is going on? Thanks in advance!