Christie GraphXMASTER RPMS-D100U User Manual page 47

OPERATION
RPMS, CS50 & CS70-D100U/UF User's Manual
3-30
- Enter a checkmark to terminate the video inputs 3 and 4
VIDEO TERMINATION
(75 Ω). The input should be terminated unless the signal loops through (continues) to
another projector or display device, in which case only the last projector in the chain
should be terminated.
ENABLE DECODER AGC -
images only. Enter a checkmark (default) for most decoded video sources—this
activates the AGC circuit to ensure properly bright images. Delete the checkmark if a
decoded video image exhibits strange color artifacts such as stripes in highly
saturated colors, indicating an incompatibility between this source and the AGC.
DECODER LUMA DELAY -
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
NOTES: 1) It is recommended that only experienced users use the Input Levels
menu—the projector automatically optimizes input levels for all but the most unusual
of sources. 2) Always check that overall contrast and brightness settings are near 50
and that color temperature is properly set up on an internal grayscale test pattern
before attempting an input level adjustment. 3) There must be at least one white pixel
present in the image for proper "Auto Input Level" function. Leave this control off.
4) It is recommended that you turn White Boost off (value of 0) before adjusting
Input Levels.
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 from the Main menu), the projector 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 1 white pixel in the
image. Without a white pixel, input levels may produce skewed colors, particularly in
non-video images.
However, for a very unusual source exhibiting overly high blacklevels (most often
caused by a noisy source that causes blacklevel spikes), an experienced user may
The AGC, "automatic gain control" affects decoded video
This control affects any incoming composite or S-video
Figure 3.15. Input Levels Menu