Christie M Series User Manual page 77

1. Ensure overall "Contrast" and "Brightness" settings are both set to near 50.
NOTE: Not required for "Auto" adjustment.
C
ONTRAST
2. Check the color temperature setup using an internal grey scale test pattern, making sure to obtain a neutral
grey scale.
NOTE: Not required for "Auto" adjustment.
3. Confirm that you are using input on an Analog BNC card or a Dual Link DVI card. Input Levels are not
applicable for sources going through the decoder. A grey scale is recommended.
4. If black levels are too high (and/or whites are too low, which is rare), you likely have a noisy source that is
producing skewed input levels. Enable "Auto" in the Input Levels menu. Wait for all six values to
stabilize. Alternatively, do not use "Auto"; reduce black levels manually instead. Judge by eye and change
one or more of the six levels as necessary to obtain proper blacks and whites. You may want to see only a
certain color while adjusting; use the Auto Color Enable option (described below).
5. Delete the "Auto" check mark and leave the Input Levels menu.
• Auto Color Enable: When a check mark is present, selecting a specific black level or drive to adjust will
automatically enable the corresponding color in the display. Delete the check mark to see all colors, or to
enable a different specific color through the Color Enable control.
• Clamp Location: Brightens the image produced from certain high-resolution high-frequency graphic
sources. The projector automatically selects the best clamp location for most sources. Use the normal Back
Porch location if the image is either sufficiently bright or overly bright. Select Sync Tip if the image appears
unusually dim, if there are horizontal streaks across the image, or if there is significant color drift. This
moves the clamping pulse from the normal back porch location (which is likely too short) to the tip of the
horizontal sync pulse. Tri Level is typically needed for an HDTV source.
• Input Peak Detector: A tool to assist with defining individual input levels, enabling you to accurately set
the Input Levels for any particular source with the appropriate image. Enabling the Peak Detector activates a
special operating mode for detecting only pixels that are considered black or white—all other levels are
displayed as a mid-level grey. When used with a smooth grey scale pattern in which black and white are
known to be at opposite edges of the image, you can watch these isolated areas while adjusting individual
black levels and input drives until both black and white edges are just visible and distinguished from
neighboring pixels. Images from this source will then display correct blacks and whites without crushing.
See Figure 3-8.
1. Display a 16 level grey scale test pattern from the desired external source, and enter a check mark in the
Input Peak Detector check box.
NOTE: The Input Peak Detector will initially render the grey scale as a uniform grey field before
adjustment or extreme crushing.
2. Display one primary color.
NOTE: Select Auto Color Enable to ensure the correct color is displayed for each setting.
3. For the current color, adjust its corresponding Black level slide bar just until a single band of black appears
at one edge of the screen. This band represents the first band of the grey scale pattern, which should be
100% black.
4. With the same color still active, adjust its corresponding Input Drive slide bar just until a single band of
color appears at the opposite edge of the screen. This band represents the last band of the grey scale
pattern, which should be 100% white (or the current color, if a certain color is enabled).
5. Check the black band and adjust the black level slide bar if necessary.
NOTE: Adjusting the black levels affects the gain. Only adjust when necessary.
M Series User Manual
020-100009-08 Rev. 1 (05-2013)
RIGHT
= 50 (approx.)B = 50 (approx.)
Section 3: Operation
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