Input Levels - Mirage 2000 User Manual

OPERATION
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Mirage 22000/4000/6000User's Manual
•
0 IRE
– For DVD output with "enhanced black", SECAM, most PAL
standards, and Japanese NTSC.
•
7.5 IRE
– For most NTSC video signals.
For some types of video, you can override the setting. The control is disabled for other
types of video (and all graphics sources). Generally, if black appears crushed when
brightness = 50, choose "0 IRE". If black appears excessively elevated, use "7.5 IRE".
VCR –
This control determines to what degree the projector tolerates signal
disturbances. The correct setting is automatically determined and set according to the
type of incoming source signal–for instance, there should be a checkmark for all
VCR sources. The VCR option may require a change from its auto setting in very
rare circumstances only, such as if you are having difficulty switching between two
unusual and almost identical VGA computer sources. Otherwise, it is not necessary
to change this option.
VIDEO TERMINATION —
to terminate the video inputs 3 and 4 (75
S
).
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 –
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
submenu—the projector automatically optimizes input levels for all but the most
unusual of sources. 2) Before attempting an input level adjustment, 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 one white pixel
present in the image for proper "Auto Input Level" function. Leave this control off.
Enter a checkmark
The "automatic gain control" affects decoded video images
This control affects any incoming composite or S-video