PLUS Vision U4-237 - Manual (Page 46)

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White Balance
This function automatically adjusts the black level and the white level of
the analog RGB input signal to suit the personal computer.
1 Select the item name [White Balance] and press the ENTER button.
The display will change to [Input Black Signal].
2 The screen background color of the connected personal computer
will be set to black.
3. Press the ENTER button. The display will change to [Adjusting Black]
and the black level will be adjusted.
4 The adjustment of the black level is completed and the display
changes to [Input White Signal].
5 The screen background color of the connected personal computer
will be set to white.
6 Press the ENTER button. The display will change to [Adjusting White]
and the white level will be adjusted.
[White balance complete] is displayed for a while and the adjustment is
completed.
Color