Adjusting The Input Balance - Barco R9010100 Owner's Manual

Black level setting : brightness
White level setting : contrast
The same absolute black and white level for the three colors allows the same reference for Brightness and Contrast control of the
picture !
These two references also set the range in which the ADC will work for that particular source (this explains also why each input
balance setting is linked to a particular source and thus saved in the image file).
6.4.6.2

Adjusting the input balance

How can it be done ?
To balance the three color signals of a particular source there are conditions; in fact we must know the black and the white level of
the source i.e. :
1. The source in question must be able to generate a white signal, ideally a 100% white (background) full screen pattern
2. The source in question must be able to generate a black signal, ideally a 100% black (background) full screen pattern
A
Image 6-7
White balance : In the projector, we will set the contrast for each color until we get a 100% light output picture when projecting a
100% white image (image A)
Black balance : In the projector, we will set the brightness for each color until we get a 0% light output picture when projecting a
100% black image (image B).
The changeover from min to max is indicated by the apparition of bright spots also called "digital noise"
An alternative to a full screen White/black pattern is the standard gray scale pattern, the white bar will be used
for white balance and the black bar for black balance.
Image 6-8
Black balance
1. Push the cursor key ↑ or ↓ to highlight Input balance. (menu 6-37)
2. Press ENTER to select.
The Input balance menu will be displayed. (menu 6-38)
3. Push the cursor key ↑ or ↓ to highlight Black balance.
R5976690 XLM H25 25/05/2009
B
6. Adjustment Mode
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