I have indeed watched a TV set that received signals broadcast from a nearby transmitting antenna, using circuits that were designed to receive exactly those signals.
I have not figured out how one would do the same with signals from a distant planet orbiting a distant star, and presumably rotating on its axis, where said signals would be available a tiny fraction of the time due to said rotations, and extremely weak, and modulated using a completely unknown method at unknown frequencies and repetition rates.
