What about receiving OTA broadcasts?
Since it doesn't have a built-in tuner, it doesn't have an input for coaxial cable. Does the Dish Network box act as a tuner? If so, I imagine you could attach an antenna through it before running the signal into the television. I know you can do this with some VCR's.
My cable company provides the tuner I use, so I've never tried to receive any OTA signals with it.