Generally, an antenna is required to received digital TV signal.
We've got to do something to stop those TV signals!
However, if you only want radio rather than TV signals, I would expect a 90cm dish to do the job.
Its digital TV signal on channel 2 started in 2003.
Question number 3: any kind of radiation would work - TV signals are usually also called "radio waves" by the way.
The fort also houses a television tower for broadcasting local TV signals.
The better some other civilization's receivers are, the farther away they could be and still pick up our TV signals.
TV signals can't be squeezed into submarine cables, so they grab the satellites.
Even the TV signal was turn off by the workers.
But these companies are not necessarily planning to use those frequencies for TV signals.