Nice! I learned stuff.
I think you meant to have different text in the out of range mode = 1 box.
Also, I had a little trouble following some of the setting explanations -- they seemed to whiz by too fast. You might consider putting in more demonstrations, like the excellent attenuation examples. That would give viewers more time to absorb (and be more entertaining).
Or, you might just pause at the end of each screen-full of information to say something less important, expand on something -- just generally slow down -- in case your viewer is still reading.
I liked the way you grouped similar functions. That's something you don't get (enough of) from the generated documentation.
