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RPMX/RPMSP-D132U & RPMSP-D180U User Manual
020-100245-03 Rev. 1 (11-2010)
Section 3: Operation
3.7.1 Contrast
Changes the perceived difference between light and dark areas of your image (0-100). For best results, keep
close to 50 or start with a low value and increase so that whites remain bright but are not distorted or tinted, and
that light areas do not become white (“crushed”). If contrast is set too high, the light parts of the image lose
detail and clarity. If set too low, the light areas will not be as bright as they could be and the overall image will
be dim.
NOTE:
If the environment lighting changes, an adjustment of Gamma is recommended.
3.7.2 Brightness
Increases or decreases the amount of black in the image (0-100). For best results, keep close to 50 or start with
a high value and decrease so that dark areas do not become black (“crushed”). Conversely, high brightness
changes black to dark gray, causing washed-out images.
3.7.3 Gamma
A global setting that determines how gray shades are displayed between minimum input (black) and maximum
input (white) for all signals. A good gamma setting optimizes blacks and whites while ensuring smooth
transitions for the “in-between” values utilized in other colors. The overall tone of 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.
A gamma setting of 2.22 is correct for most signals and conditions. If ambient light washes out the image,
making it difficult to see details in dark areas, lower the gamma setting 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.
3.7.4 Filter
The proper filter setting is automatically set for most signals. 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 reduces pixel phase
noise and signal bandwidth.
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