All of which is a long winded way to ask have they taken into account
a localized, strong FM RFI source with their controller?

Did you happen to ask about that?



Yes, but I didn't include it in the article because it was more technical than
a lot of people would appreciate, myself included.

There is a "check sum" signal that is continuously broadcast betweeen the
transmitter and the receiver. I'm not an electronics whiz, but it was explained
to me that this allows the receiver to verify the source of the signal and
allows the transmitter to confirm that the signal is being received. The
transmitter makes a beeping noise if the confirmation signal from the receiver
should ever stop.

I surmise that in layman's terms this probably means that if a device
accidentally broadcast on the same 1 in 65,000 digital frequencies that the
transmitter uses, nothing would happen because the transmitter wouldn't be able
to
communicate with the device to "confirm" the instructions.......but that's my
asumption, not an established fact.