USB.

NNIf you select a source other than TV or USB, you must:

ŒŒ Have a cable or satellite set-top box attached to that source

ŒŒ Set the set-top box to the channel you want to watch when the TV goes on

ŒŒ Leave the set-top box turned on.

NNWhen you select a source other than TV or USB, the Aerial and Channel