Christie Mirage S+/HD/WU User Manual page 86

Section 3: Operation
Tint
This slidebar adjusts the red/green color hue for true color reproduction of video and HDTV signals connected
to Input 3 or 4. For best results, adjust the tint while displaying an external test pattern,otherwise, it is
recommended that tint remain at its default setting.
Decoder Luma Delay
This control affects any incoming composite or S-video signal, delaying the luma signal (intensity) in relation
to the chroma (color). In the image, increasing the luma delay moves luma (seen as a shadow where colors
overlap) to the right slightly, with colors remaining in place. Decreasing this delay moves the shadow slightly
to the left. If necessary for your current source, adjust so that no shadows occur with adjacent colors.
Input Levels Submenu
Select Input Levels from the Image Settings menu.
NOTES: 1) Because the projector automatically optimizes input levels for all , but the most unusual of
sources, it is recommended that only experienced users use the Input Levels submenusubmenu. 2)
Before beginning, check that overall Contrast and Brightness settings are near 50 and that color
temperature is properly set up on an internal grayscale test pattern. 3) There must be at least 6-12
consecutive white pixels present in the image for proper "Auto Input Level" function. Leave this
control OFF after use.
Good RGB or input levels (that is, the drives and blacklevels for each of the 3 colors, red, green and blue)
ensure that images from analog sources, other than decoded video, have maximum contrast without crushing
black or white. By default (and in an "Auto Setup"), the projector automatically determines the best input
levels by monitoring image content and adjusting the controls appropriately. It is not necessarty to make
further adjustments to obtain proper blacks or whites.
NOTE: This automatic adjustment requires at least 6-12 consecutive white pixels in the image. Without these
pixels, input levels may produce skewed colors, particularly in non-video images.
However, for a very unusual source exhibiting 1 or more overly high blacklevels (typically caused by a noisy
source causing blacklevel spikes), an experienced user may prefer to use the Input Levels menu (shown
above). These adjustments, which together serve as a calibration process compensating for differences in
sources and cabling, enable an experienced user to perfect the source image input levels and eliminate the
"overshoot" and "undershoot".
NOTE: 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.
Auto Input Level
Temporarily enter a checkmark only if you are an experienced user and you have an unusual source that you
feel needs further color temperature and/or input level adjustment. This compensates for incoming out-of-
range drives (white) and blacklevels (black) that would cause "crushing" of light and dark colors in the image.
Once the 6 slidebar values stabilize, clear the check box, and exit. The Auto Input Level should be
automatically turned OFF (check box cleared) upon exit from the Input levels menu.
Blacklevels and Drives
To check your image and adjust these controls:
1. Make sure overall Contrast and Brightness are both set to near 50.
• C
= 50 (approx.)
ONT
3-34 Roadster, Matrix WU, Mirage S+/HD/WU User Manual
020-100002-06 Rev. 1 (04-2011)