
If you have a wall plate such as the one pictured above, this is where your TV antenna connects. The TV nearest the wall plate connects to the connection on the front of the wall plate. There should be another coax that connects to the back side of the wall plate that goes to the other TV. There should also be a coax that connects to the back side of the wall plate for cable TV. The wall plate also supplies power to the antenna head. The button on the front switches between cable and antenna.
You don't need the Sat receiver to watch over-the-air TV.