Thank You for reply.. As I wrote, it will be great to have in spectra graph scaling also in dBr (relative to fundamental), so that fundamental is always shifted to 0dB(r), harmonics and the and whole "background" shifted the same value as fundamental frequency.
E.g in attached spectra graph add to "everything" ofset +17dB and scale change to dBr. Normalize graph to fundamental
As an aside, you can work around it for a particular input level by running SPL calibration using the 'external signal' option and telling REW the input level is 0.
Sure, it's possible, but very unpractical to do it again for each different level. Maybe option "ofset", to do it manually after measurement.
Thanks in advance.
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