FFT options scaling confusion

It looks like the FFT options calculations has the log scaling under the wrong selection according to the manual.

This image
image

produced these FFTs

It looks like the log spectrum is done under the wrong selection. of FFT options.

Let me know if I’m not understanding something.

Thanks
Ron

The manual seems to be correct. When “not log” then you see only a peak, with log, you see the weak detail. To check, just process the power spectrum with a log operation.

Thanks for the help…I don’t know what I was thinking…I think I need some coffee!

Ron