Barco NH-12 User Manual page 74

7. Advanced
If one uses a checkerboard pattern, the bright spots should appear in the black blocks.
Black Level... is greyed out if Automatic Black level is enabled (ON).
Performing White input balance
1. Select a white pattern (or gray scale as alternative)
2. Press MENU to activate the Tool bar
3. Press → to select the Image item
4. Press ↓ to Pull down the Image menu
5. Use ↑ or ↓ to select Input balance
6. Press → to pull down the menu
7. Use ↓ or ↑ to select White level...
Image 7-35
8. Press ENTER
A dialog box is displayed
9. Adjust the red white level (gain) on a minimal value
Image 7-36
10.Adjust the blue white level (gain) to a minimal value
Note: this minimal value is not necessary , provided that the 2 other colors are not influencing too much the color to be adjusted,
in fact the aim is to minimize the effect of the two other colors since there is a risk of reaching too soon the transition
(bright spots) due to the contribution of these two other colors signals.
11. Adjust the Green white level (gain) until bright spots appear on the white part of the image
12.Adjust the Blue white level (gain) until bright spots appear on the white part of the image
13.Adjust the Red white level (gain) until bright spots appear on the white part of the image
The projected image should now be noisy neutral grey.
If one uses a checkerboard pattern, the bright spots should appear in the white blocks.
70 R59770121 NH-12 04/05/2011