Samsung PN51E6500EFXZA - Manual (Page 78)

shades of grey and black.
Pattern2 : This test screen demonstrates
the effect of your display settings on
colors.
N After selecting Pattern1 or Pattern2 ,
you can adjust any of the advanced
settings for the effect you desire.
N While the Expert Pattern is running,
the TV does not output sound.
N Only enabled in DTV, Component,
and HDMI modes.