User manual

Section 3: Operation
Mirage S+/HD/WU, Matrix S+/HD/WU, Christie HD/DS+/DW, DLV User Manual 3-25
020-100001-07 Rev. 1 (11-2009)
Brightness
(
SHORT CUT: Press
Br i g h t
and adjust the slide bar.)
“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.
Gamma
(
SHORT CUT: Press
Gamma
and adjust the slide bar.)
“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.
Detail
“Detail” adjusts the sharpness of a video image so that edges remain clearly defined. It
can be particularly useful if a significant “Noise Reduction” adjustment has caused the
image to appear too soft. Adjust until the display is as sharp as desired, keeping in
mind that because “Detail” adds some high frequencies back into the image, it can
also re-introduce a certain degree of noise.
Off
RGB
HDTV
EDTV
SDTV
1.
2.
3.
4.
5.