Samsung The Serif 108 cm E-Manual page 82

Using Input Signal Plus Features
Settings General
Expands the input signal range for HDMI connections.
Move the port you wish to apply
With external devices that support FHD frequency or up to UHD 24Hz / UHD 30Hz frequency only,
work properly when activated. In this case, disable the
For more information about UHD resolution, see the "UHD Compatibility" section.
Using HDMI Black Level
Settings General
Optimize the brightness and contrast levels of HDMI images by adjusting the signal's black level. Doing so helps
prevent screen burns and improve contrast and vibrance.
Only available if the input signal from the external device connected to the HDMI port is RGB444.
External Device Manager
Input Signal Plus to and set it to
Input Signal Plus
External Device Manager
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Input Signal Plus
On by pressing the Select button. The screen may flicker.
feature.
HDMI Black Level
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Input Signal Plus may not
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