Christie Roadie HD+35K, User Manual

Page: 94 / 192

3-28 Roadie HD+35K User Manual
020-100340-02 Rev. 1 (01-2010)
Section 3: Operation
Contrast Option
Short Cut: Press
CONT
on the standard IR remote and adjust the Contract slidebar in the menu.
Select
Contrast
from the
Image Settings
menu. "Contrast" increases or decreases the perceived difference
between light and dark areas of your image (0-100). For best results, keep close to 50. If the contrast is set too
high, the light parts of the image lose detail and clarity. If the contrast set too low, the light areas will not be as
bright as they could be, and the overall image will be dim. For best results, 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 (i.e., are
"crushed").
NOTE: If the environment lighting changes, an adjustment of Gamma is recommended (see below).
Brightness Option
Short Cut: Press
B
RIGHT
on the standard IR remote and adjust the Brightness slidebar in the menu.
Select
Brightness
from the
Image Settings
menu. "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 affects contrast, and should be adjusted first.
Gamma Option
Short Cut: Press
G
AMMA
on the standard IR remote and adjust the
Gamma slidebar in the menu.
Select
Gamma
from the
Image Settings
menu. "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 settings controls, the overall tone of your images can be lightened or
darkened without changing the extremes, and all images display more vibrantly while still showing good detail
in dark areas.
Gamma fine-tunes the gamma table currently in use, ranging from 1- 3 (default = 2.2, indicating that the
chosen gamma table has not been adjusted). 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 improves
contrast while maintaining good details for blacks. Conversely, if the image is unnatural with excessive detail
in black areas, increase the setting. For more information, refer to the
Gamma Table and Figure 3-29 . Again,
look for good contrast and good details in very dark areas.
Filter Option
Select
Filter
from the
Image Settings
menu. 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.