Samsung PN51E6500EFXZA - Manual (Page 174)

turns on. You can:
– Select
TV and have the TV display a
specific air or cable channel.
– Select
USB and have the TV play
back photo or audio files from a USB
device.
– Select a source on your TV (
HDMI1 ,
HDMI2 , Component , etc.) that you
have connected a set-top box to, and
have the TV display a channel from
the set-top box.