Samsung PN51E8000 E-Manual page 79

if the broadcast signal received by your
TV is weak, you can activate the ©::O::t:_:
feature to reduce any static
and ghosting that may appear on the
screen.
::::::::::_ : :x _::::::_ When chang in g
analog channels, displays signal
strength.
the signal is weak_ try all the
options until TV displays the
picture°