Well... The digital RF is not avoiding IMD... It is basically ignoring it.
The IMD is still there, but because of the extremely narrow band-width (and stroooong SAW type filtering) necessary the spurious external signals don't have enough of the desired signal to "grab onto" to make it modulate spuriously.
In other words, those 2.4GHz digital systems are
insensitive to IMD.
There is not a
practical way to combine these signals given
current non-magical technology.
The problems with digital that the manufacturers will tout as advantages are primarily that it is either working... or it isn't.
Unlike our old analog wireless systems that could
fade a little and still be heard... digital is there then
pouf it is not.
Oh, and ten "channels" is about the
practical limit for these systems given their micro-slice of spectrum.
The AT
system here is clever in that the RX modules can be popped out and placed closer to the action via a dedicated NIC.
You can't run it through a
switch or your fiber (even with converters), but you can get 99 meters closer... in the lab. I'd wager 70-80 meters is more realistic ITRW.
My problem with the AT
system is short handheld TX battery life. We got about 70 minutes on a set of good duracells.
Otherwise this rack looks legit. I like the Rolls
mixer, they are fairly
neutral (we have a fleet of them here).