Christie M Series User Manual page 89

e. In the White Uniformity menu, and set the "Overall" output level to 50.0 and all remaining slide bars
to 0.0. This decreases the light output just enough throughout the screen so that any color level can
then be increased later as necessary for matching light output from zone-to-zone. Do not exceed 50.0
for "Overall"—a higher level will likely interfere with achieving brightness uniformity and is not
recommended.
Ensure that overall light output remains well matched from one screen center to the next. Where necessary,
increase or decrease Lamp Power slightly to recover center matches.
Step 2: Adjust Color (level of red/green/blue) in Eight Zones
At this point, ignore the brightness of individual zones.
NOTES: 1)
a. On each screen, compare the color temperatures in the eight target zones (four edges and four corners)
to that of the color temperature of the center. Compare using a white field only, and take note of any
areas that do not match the center. Also decide if any screen exhibits a more obvious color shift than
other screens—begin with this screen in Step 2b.
b. Return to the Brightness Uniformity menu. Beginning with the screen that exhibits the most obvious
color shift(s), for each edge that exhibits a noticeably different color temperature from the center, select the
corresponding Uniformity adjustment menu—Left, Right, Top or Bottom. For example, if any part of
the left side is too blue, too red or too green, go to the Left Uniformity menu and adjust the colors (i.e.,
change their light output) until all portions of the left side closely match the center color temperature.
Adjust an edge first (focusing on its center), and then adjust its corners.
Repeat the color adjustment of sides and corners for each edge of the screen that does not yet match the center
(note that each corner is adjustable in either of its two adjacent "side" menus). When done, all areas of a given
screen should match. Repeat Steps 2a & 2b for all remaining screens.
Step 3: Adjust Light Output in Eight Zones
a. For each screen, compare the light output of each edge and corner to that of the center. If any of the
areas differ, use the White Uniformity menu to match edges and corners to the center as described
below. Begin with the screen exhibiting the most obvious variations in light output.
• Adjust edge White Uniformity first—note that each edge adjustment also affects the rest of the
screen slightly. Keep all edges just slightly lower than the center light output rather than matching light
output precisely. Otherwise, it may not be possible to brighten the corners (typically the dimmest areas
of the screen) enough. i.e., the best uniformity is a compromise between the brightest and darkest areas
of the screen.
• Adjust corner White Uniformity last—each corner adjustment affects only this quadrant.
• Repeat for each screen.
Step 4: Readjust Color Temperature (level of red/green/blue) in Eight Zones
a. Return to Steps 2a & 2b and, if necessary, fine-tune the zones so that they all still exhibit a single color
temperature.
Cancelling Brightness Uniformity
If you do not want to use or apply Brightness Uniformity settings, delete the checkmark from the Uniformity
Enable check box at the top of the Brightness Uniformity menu.
M Series User Manual
020-100009-05 Rev. 1 (09-2010)
Section 3: Operation
Always ignore menu colors.
2)
Bottom defined by the slope.
NOTE:
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