Runco Video Xtreme VX-40d Owner's Operating Manual page 56

Section 3: Operation
COLOR — This slidebar adjusts the color saturation level, i.e. the amount of color in
a video image. Lower settings produce less saturated colors — for example a setting
of "0" produces a black and white image. If the color level is too high, colors will be
overpowering and unrealistic.
TINT — This slidebar adjusts the red/green color hue for true color reproduction of
video signals connected to INPUT 3 or 4. For best results, adjust tint while displaying
an external color bars test pattern—otherwise, use the default setting.
DECODER LUMA DELAY – This control affects any incoming composite or S-video
signal, delaying the luma signal (intensity) in relation to the chroma (color). In the
image, increasing the luma delay will move luma (seen as a shadow where colors
overlap) to the right slightly, with colors remaining in place. Decreasing this delay will
move the shadow slightly to the left. If necessary for your current source, adjust so
that no shadows occur with adjacent colors.
Input Levels — SUBMENU
NOTES: 1) Because the projector automatically optimizes input levels for all but the most
unusual of sources, it is recommended that only experienced users use the Input Levels
submenu. 2) Before beginning, check that overall contrast and brightness settings
are near 50 and that color temperature is properly set up on an internal grayscale test
pattern. 3) There must be at least two consecutive white pixels present in the image for
the "Auto Input Level" function to work properly. Uncheck this item before exiting this
menu.
Good RGB or input levels
— that is, the drives and
blacklevels for each of the
three colors, red, green and
blue — ensure that images
from analog sources other
than decoded video have
maximum contrast without
crushing black or white.
By default (and in an "Auto
S e t u p " ) , t h e p ro j e c t o r
automatically determines
the best input levels by
monitoring image content and adjusting the controls appropriately; further adjustment
is typically not required to obtain proper blacks or whites.
NOTE: This automatic adjustment requires at least two consecutive white pixels in
the image. Without these pixels, input levels may produce skewed colors, particularly in
nonvideo images.
However, for a very unusual source exhibiting one or more overly high blacklevels
(typically caused by a noisy source causing blacklevel spikes), an experienced user
may prefer to use the Input Levels menu (shown above). These adjustments, which
together serve as a calibration process compensating for differences in sources and
cabling, enable an experienced user to perfect the source image input levels and
eliminate the "overshoot" and "undershoot". Note that Input Levels are of limited
use with digital signals, but do offer some ability to tweak poorly mastered source
materials.
Runco VX-40d/-50d/-60d/-80d Owner's Operating Manual
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