Christie M Series User Manual Download

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Section 3: Operation

M Series User Manual

3-27

020-100009-05 Rev. 1 (09-2010)

•

AUTO COLOR ENABLE

When a checkmark is present, selecting a specific black level or drive to adjust will automatically enable the
corresponding color in the display. Delete the checkmark 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 greyscale 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 3-29 Adjusting Input Levels Using the

Peak Detector (RED EXAMPLE SHOWN)

1. Display a 16 level greyscale test pattern from the desired external source, and enter a checkmark in the

Input Peak Detector

check box.

NOTE:

The

Input Peak Detector

will initially render the greyscale 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 greyscale 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 greyscale 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.

6. Repeat Steps 3-5 with the two remaining primary colors. When each primary color shows one optimized

black band and white (or colored) band, the input levels for this source are correctly set. Upon exiting the

Input Levels

menu, the Peak Detector check box will clear.