Input Levels - Submenu - Christie M Series User Manual

Section 3: Operation

3.6.6 Input Levels - Submenu

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 submenu. 2) Before beginning, check that
overall contrast and brightness settings are near 50 and that color temperature is properly set up on an
internal gray scale test pattern. 3) See
Good RGB or input levels—that is, the drives and black levels for each of the three 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. Further adjustment is
typically not required 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.
For a source exhibiting overly high black levels (typically caused by a noisy source causing black level spikes)
use the Input Levels menu (shown above). 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".
NOTES: 1) Input Levels are of limited use with digital signals, but do offer some ability to tweak poorly
mastered source materials. 2) Input levels apply for the current source only, but for any color temperature
used. 3) 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: Use 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 black levels (black) that would cause "crushing" of light and dark colors in the image.
After entering a check mark, wait for the six slide bar values to stabilize, then delete the check mark and exit.
The Auto Input Level is automatically turned off upon exit from the Input Levels Menu.
• Black Levels And Drives:
IMPORTANT! Do not use Input Levels to adjust color temperature. This will distort contrast and brightness
functions as well as color temperature.
To check your image levels and adjust these controls:
3-26
3.1.6 Remote Keypad Commands, "AUTO".
M Series User Manual
020-100009-08 Rev. 1 (05-2013)