Part of the reason the RF spectrum is as such lies in the fact that the current SND spectrum (just to create a fancy name...) is greatly simplified. Still great, it's not that...
I know that in reality, some cases tonal strength increase/decrease with a number of things, from time to speed to rudder position, instead of "generic signal strength/frequency" only, as well as a shift in frequency depending on similar things, tonals corresponding to certain actions (such as retrieving wires/TAs) etc etc.
But then, I guess it's just as well that we don't have to be qualified for the real thing to play
-~~~