Hello Robot256!
I'm enjoying the other mods as well. So I was looking for your other mods and found this one. I installed it and tried it. I'm not good at English, so I used a translator to experiment with what this "Shortwave" is, but I'm not sure.
Could you please tell me in what situations this mod is used or provide some helpful explanation?
I'm a beginner with little to no schematics. :)
So maybe I don't know.
Thank you.

The shortwave radio is used to link red and green circuit networks between two points without needing to place wires the entire distance between them. The channel of each radio is set by choosing a signal and number (this selection doesn't affect how the circuit network contents are transmitted, it just has to be the same on both sides).