Hi. I am experiencing the following measurement issues with the 2206 on the Mac.
I originally purchased a 2204 and recently added a 2206.
On the 2206, in spectrum mode, the data acquisition appears unstable. The harmonic signals vary greatly and with automated measurements, the numbers jump around quite a bit. For example, THD might vary between 0.1% to 0.4%, or between 1.2% and 2%. Installing the 2204 and using the same probe, the data acquisition and measurements become stable (though the automated distortion measurements are comparatively higher than those from the 2206).