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Read through the entire procedure before attempting to adjust White Field Uniformity controls, and keep in mind
the following checklist of prerequisites and guidelines:
•
ADJUST COLORS FIRST
— Always adjust the primary colors as described in the “Matching Colors in
Multiple Screens” procedure (above) before attempting to work with White Field Uniformity. This insures
that primary colors, color temperature, and maximized light output are all well matched from one screen
to another. These matches are needed before you can achieve good White Field Uniformity results.
•
RUN LAMP FOR 100 HOURS
— Light output and White Field Uniformity can vary significantly during the
first 100 hours of lamp use. For best results with new lamps, either set up White Field Uniformity after
this period, or do an initial setup and re‐check at 100 hours
•
SET LAMP POWER
— Insure that each “Lamp Power” setting is as high as possible for your application
while still maintaining a good overall match of light output from screen to screen. By nature, achieving a
uniform brightness will require a slightly reduced overall brightness—this reduction will help insure that
you have enough range of adjustment when examining brightness variables more closely from screen‐to‐
screen, and will help prevent premature “maxing out” when trying to match to a certain color, zone or
projector.
•
USE A “USER” COLOR TEMPERATURE
— Always adjust White Field Uniformity for a User color
temperature defined when you matched primary colors, and continue to use it for all sources displayed
on the wall. Your other color temperatures will not necessarily be matched from screen‐to‐screen.
•
WHITE UNIFORMITY SLIDE BARS
— White Uniformity slide bar values may not reduce to “0”. Each slide
bar adjusts overall light output in a specific screen zone, but the value shown represents the current
setting for green in this zone. When other “hidden” values (red or blue) are lower than green, during
adjustment in the White Uniformity menu their values will reach “0” first, causing the slide bar to stop
earlier than expected.
•
JUDGE BY EYE OR USE A METER
— Good White Field Uniformity can be achieved with either.
Step 1: General Setup
1a) Adjust primary colors (see Matching Colors in Multiple Screens) to insure matched overall color temperatures
and light output between screens.
IMPORTANT:
Double‐check that all WHITES and LIGHT OUTPUT are well‐matched.
1b) Enable the White Field Uniformity checkbox. This will enable
access to the uniformity controls and will apply the settings to your
image.
1c) Select the 13‐Point test pattern for display. This pattern provides
nine screen “zones” with 13 targets.
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