Christie Roadie HD+35K, User Manual

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Section 3: Operation
Roadie HD+35K User Manual 3-31
020-100340-02 Rev. 1 (01-2010)
Decoder Luma Delay Option
Select
Decoder Luma Delay
from the
Video Options
menu. 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 moves luma (seen as a shadow where colors overlap) to the right slightly, with colors remaining
in place. Decreasing this delay moves the shadow slightly to the left. If necessary for your current source,
adjust so that no shadows occur with adjacent colors.
Input Levels Option Menu
Select
Input Levels
from the
Image Settings
menu.
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 secondary menu.
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 6-12 consecutive white pixels present in
the image for proper "Auto Input Level" function. Leave this control off after use.
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 Setup"), the projector automatically determines the best input
levels by monitoring image content and adjusting the controls appropriately. It is not necessarty to make
further adjustments to obtain proper blacks or whites.
NOTE:
This automatic adjustment requires at least 6-12 consecutive white pixels in the image. Without these
pixels, input levels may produce skewed colors, particularly in non-video 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:
Input Levels are of limited use with digital signals, but do offer some ability to tweak poorly mastered
source materials.
Auto Input Level
Select
Auto Input Level
from the
Input Levels
menu. Keep OFF for virtually all sources (default). If you are
an experienced user, you can temporarily select the check box if you have an unusual input source that you
feel needs further color temperature and/or input level adjustment. This compensates for incoming out-of-
range drives (white) and blacklevels (black) that would cause "crushing" of light and dark colors in the image.
Once the six slidebar values stabilize, clear the check box, and
E
XIT
. The Auto Input Level should be
automatically turned OFF (check box cleared) upon exit.
Blacklevels and Drives
To check your image and adjust these controls:
1. Make sure overall Contrast and Brightness are both set to near 50.
•
C
ONT
= 50 (approx.)
•
B
RIGHT
= 50 (approx.)
NOTE:
Not required for "Auto" adjustment.
2. Check the color temperature setup using an internal grayscale test pattern, making sure to obtain a neutral
grayscale.