I am trying to measure the spectrum of an audio signal, but cannot find a way to change the frequency range on the x-axis of the Spectrum diagram.
See attached screen shot:
In the bottom view the spectrum frequency range cannot be changed.
If I only have one view with a spectrum, then the time/division drop down box changes to the frequency range selection, but then I cannot see the signal I am measuring.
Am I doing something wrong?
A second question:
Is it possible to calculate the spectrum from only a part of a trace, say the area between the cursors?