Samsung UN46ES7500F E-Manual page 569

channels from the channel line up.
ΠAir/Cable Antenna connection: Try
HD channels after performing an
Auto Program.
Adjust the Cable/Sat box video output
resolution to 1080i or 720p.
The picture is distorted: macro block error,
small block, dots, pixelization
The compression of video contents
may cause picture distortion especially
in fast moving pictures such as sports