Christie Roadster S+12K User Manual page 69

Roadster & Mirage S+/HD User Manual
020-100002-04 Rev. 1 (12-2008)
Brightness
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Bright
"Brightness" increases or decreases the amount of black in the image (0-100). For
best results, keep close to 50. Start with a high value and decrease so that dark areas
do not become black (i.e., are "crushed"). Conversely, high brightness changes black
to dark gray, causing washed-out images.
NOTE: Brightness should be adjusted before contrast, as Brightness setting affects
the contrast setting.
Gamma
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Gam m a
"Gamma" is a global setting that determines what gray shades are displayed between
minimum input (black) and maximum input (white) for all signals. A good gamma
setting helps to optimize blacks and
whites while ensuring smooth transitions
for the "in-between" values utilized in
other colors. Thus, unlike "Brightness"
and "Contrast" controls, the overall tone
of your images can be lightened or
darkened without changing the extremes,
and all images will be more vibrant while
still showing good detail in dark areas.
Gamma is used to fine-tune the gamma table currently in use, ranging from 1 – 3 (2.2
= default). If excess ambient light washes out the image and it becomes difficult or
impossible to see details in dark areas, lower the gamma setting to compensate. This
will improve contrast while maintaining good details for blacks. Conversely, if the
image is washed out and unnatural, with excessive detail in black areas, increase the
setting. In high ambient light conditions, lower gamma may produce better results
than higher gamma. Gamma of 2.2 (default) indicates the gamma table has not been
adjusted. For more information, refer to Advanced Image Settings submenu, Gamma
Table. Again, good gamma improves contrast while maintaining good details for
blacks.
Filter
The proper filter setting is automatically set for virtually all
signals, and rarely needs to be changed. It applies a low pass
filter for noise reduction in the incoming input signal,
particularly for HDTV or SDTV. Applied in the analog domain
before sampling, this filtering removes high frequencies and
thus reduces pixel phase noise (note this also reduces signal
bandwidth). Override only if standard pixel tracking and phase adjustments do not
adequately clear up a "noisy" video signal, or if a graphics signal appears overly
"soft". Both instances indicate that "Filter" may be set to the wrong option.
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Operation
1. Off
RGB
2.
HDTV
3.
4. EDTV
SDTV
5.
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