Christie PowerTool User Manual page 36

Section 4: PowerTool Interface
Enable Auto Levels – When selected, automatically adjusts the Dark
Levels and Drive Levels for the source specified on the Control tab,
disabling these controls as well. You might use this feature if one of your
signals is weaker than normal for one particular color.
Before beginning, check that overall contrast and brightness settings are near
50 and color temperature is properly set up on an internal gray scale test
pattern.
For best results, use an image that has some 100 percent black and 100
percent white in it. Leave this control OFF after use. Auto levels applies to
BNC and DVI-A sources only.
Dark Levels – Red/Green/Blue – Indicates the dark levels of each color
for the specified source on the selected projector.
You should only adjust dark and drive levels manually if you are an
NOTE:
experienced user. You might choose to manually adjust dark levels is you
have a noisy source that shows black level spikes. You can use these settings
to compensate for differences in sources and cabling, allowing you to perfect
the source image input levels and eliminate "overshoot" and "undershoot".
Drive Levels – Red/Green/Blue – Drive Levels are of limited use with
digital signals, but do offer some ability to tweak poorly mastered source
materials.
Remove Auto Color – Click this to display all colors (white) again. When
you adjust one color, the projector temporarily displays only that color so
that you can match it correctly. When you are satisfied with your color
adjustment, click this button to display all colors again.
4-8
Figure 4-7 Auto Levels
PowerTool 2.1 User Manual
020-100035-03 Rev. 1 (12-2010)