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Section 3: Operation
Section 3: Operation
Color Enable
Select which color or colors you want to see. This is useful while working with color
temperature, input levels or other special setup parameters.
Odd Pixel Adjustment
NOTES: Factory-set and rarely required by user.
When using certain RGB sources, you may need to adjust the normal gain or offset
of odd pixels in relation to even pixels. This will smooth out very narrow (1-pixel wide)
“checks” or vertical stripes that indicate adjacent “on” and “off” pixels. Although offset
and gain slidebars can be adjusted individually and manually, using the Level Detector
simplifies this process (see Figure 3.21):
1. Use an external analog native-sized continuous grayscale test pattern with at
least 256-levels.
2. Turn “Level Detector” on.
3. Set “Level Value” to
~200
. The image should now be black-and-white (or black-
and-one color, if you use “Color Enable” function).
4. Adjust
offset
. Half of the pixels will move, the other half will not.
5. Adjust until the two transition regions overlap. The stripe of noise will be minimized,
defined by the value in the slidebar.
6. Set “Level Value” to
~800
. The image should now be black-and-white.
7. Repeat Steps 4 and 5, but adjusting
gain
.
8. Repeat Steps 3-7 for all remaining colors. Your RGB source should now be
OK.
NOTES:
1)
Adjust offset before gain, since offset affects gain.
2)
A value of 128 represents
no change in normal odd pixel offset or gain.
3)
Odd Pixel Adjustment eliminates “1 pixel
on, 1 pixel off” patterns only, not any type of larger patterns.
Figure 3.21. Using “Odd Pixel Adjustment”