Christie DS4K User Manual page 53

Section 3: Operation
Advanced Image Settings
— SUBMENU
This control selects
GAMMA TABLE:
and applies the normal 2.2 gamma
setting or a user-defined "arbitrary"
(custom) gamma table that has been
previously downloaded to projector
memory (these custom gamma
tables—a.k.a. curves—are created in
Christie's Arbitrary Gamma
application for the PC, and are
downloaded via a separate utility).
Use of custom curves can improve
performance for certain kinds of
source input and applications.
Generally the best gamma curve is one
that produces maximum contrast,
brightness and color performance for the current signal and ambient lighting
conditions.
NOTE: If no such curves have been defined and downloaded to projector memory,
only the "2.2, Normal" default gamma curve is available here—adjust as desired in
the main Image Settings menu.
In "Select Color Adjustment",
SELECT COLOR ADJUSTMENT:
choose an overall color performance for all images. The "Max
Drives" factory default simply drives all 3 colors at their
maximum level so that they are fully on and cannot be
changed. The two other pre-defined color adjustment
choices—SD Video and HD Video—apply a color gamut
optimized for video sources (standard or high-definition).
Alternatively, you can specify a color temperature, which
enables the nearby Color Temperature slidebar and applies its
current setting (default = 6500K). If none of the pre-defined "Select Color
Adjustment" options or color temperatures suit your application, select one of four
color gamuts previously defined by a user (User 1, 2, 3, 4). A "User" option applies a
customized color performance in which the user has precisely set the hue and intensity
of each color component in the Color Adjustment by X/Y or Color Saturation
submenus, and is most often needed with multiple-projector applications. Select the
color adjustment producing the best color accuracy for your application and
installation.
To configure a "User" color adjustment (gamut), use either the Color Adjustment by
X/Y or Color Saturation submenu found in the Configuration menu under Geometry
and Color.
NOTES: 1) "Color Temperature" defaults to 6500K until changed. All four "User"
options default to SD Video unless they have been redefined by the user. 2) Factory-
defined color primaries, which ensure consistent color gamut from projector-to-
projector, can be altered in the Service menu only. If you suspect alteration, the
factory settings can be recovered with selection of Factory Defaults in the Service
menu (password-protected).
User's Manual 3-31
.