Christie GraphXMASTER RPMS-D100U User Manual page 49

OPERATION
RPMS, CS50 & CS70-D100U/UF User's Manual
3-32
NOTES: 1) Input levels
apply for the current source
only, but for any color
temperature used. 2)
Assuming that color
temperature has been set
up based on the internal
test patterns, you can then
set up input levels for a
given source so that it
matches the color
temperature of the internal
test patterns.
Enabling the Peak Detector option activates a special operating
PEAK DETECTOR –
mode that detects only pixels that are considered black or white—all other levels are
displayed as a mid-level gray. When used with a 16-step grayscale pattern, where the
black and white bands are known to be at the edges of the image, you can watch
these isolated areas while adjusting individual blacklevels and input drives. Images
from this source will then display correct blacks and whites without crushing. See
Figure 3.16.
1. Display a 16 level grayscale test pattern from the desired external source, and
enter a checkmark in the Peak Detector checkbox. NOTE: The Peak Detector
will render all but the black-and-white side edges as a uniform gray field.
2. Display one primary color (use Color Enable to select).
3. For the current color, adjust its corresponding Blacklevel slidebar just until a
single band of black appears at one edge of the screen. This band represents the
first band of the grayscale pattern, which should be 100% black. Do not adjust
too far.
4. With the same color still active, adjust its corresponding Input Drive slidebar
just until a single band of white appears at the opposite edge of the screen. This
band represents the last band of the grayscale pattern, which should be 100%
white. Do not adjust too far.
5. Go back and check the black band—adjust the blacklevel slidebar if necessary.
Adjustments are related, so you may have to go back and forth until both bands
are just optimized.
6. Repeat Steps 2-5 with the other two remaining primary colors. When each
primary color shows one optimized black band and white band, the input levels
for this source are correctly set. Upon exiting the Input Levels menu, the Peak
Detector checkbox will clear.