Input Levels - Submenu - Christie RPMX-D132U User Manual

Section 3: Operation
3.7.9 Input Levels
NOTES: 1) The projector automatically optimizes input levels for most sources. The Input Levels submenu is
for experienced users only.
2) Before beginning, verify that overall contrast and brightness settings are near 50 and that color temperature
is set up on an internal grayscale test pattern.
3) There must be at least 6-12 consecutive white pixels and black pixels present in the image for proper "Auto
Input Level" function. Leave this control off after use.
Good RGB or input levels (the drives and blacklevels for red, green and blue) makes sure images from analog
sources, other than decoded video, have maximum contrast without "crushing". By default (and in an "Auto
Setup"), the projector automatically finds the best input levels by monitoring image content and adjusting the
controls. More adjustment is typically not required to get 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.
For an unusual source exhibiting one or more overly high blacklevels (typically caused by a noisy source
causing blacklevel spikes), an experienced user can use the Input Levels menu. These adjustments serve as a
calibration process, compensating for differences in sources and cabling to perfect the source image input
levels and eliminate the "overshoot" and "undershoot". Input Levels are of limited use with digital signals, but
do offer some ability to tweak poorly mastered source materials.
Auto Input Level
Keep OFF for virtually all sources (default). Temporarily enter a checkmark only if you are an experienced
user with an unusual source that needs color temperature and/or input level adjustment. After entering a
checkmark, wait for the 6 slidebar values to stabilize then delete the checkmark and exit. This compensates for
incoming out-of-range drives (white) and blacklevels (black) that would cause "crushing" of light and dark
colors in the image.
Black Levels and Drives
To check your image and adjust these controls:
1. Make sure overall "Contrast" and "Brightness" settings are both set to near 50.
NOTE: Not required for "Auto" adjustment.
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RPMX/RPMSP-D132U & RPMSP-D180U User Manual
020-100245-03 Rev. 1 (11-2010)