I bought a house in NC that had two dishes attached to my deck (Dish and maybe internet?). I'm not using either - does anyone know what I should do with them?
Pitch them if you don't want them. The only thing the company would have wanted back off of them is the LNB and since the account wasn't yours, it's not your responsibility.
The satellite RF signals are up around 11-14 GHz which is way too high to carry on a coaxial cable. The LNB acts as a wave guide and frequency down converter to reduce it to a frequency that can be carried on a coax cable.