Mirage 2000 User Manual page 73

OPERATION
3-36
Mirage 22000/4000/6000User's Manual
only a certain color while adjusting—use the "Color Enable" option
(described below).
6. Delete the "Auto" checkmark and leave the Input Levels menu.
IMPORTANT: Do not use Input Levels to adjust color temperature. This will
distort Contrast and Brightness functions as well as color temperature.
CLAMP TIP –
This option (full name sync tip clamping) can brighten the image
produced from certain high resolution, high frequency graphic sources. Enter a
checkmark if the image appears unusually dim, if there are horizontal streaks across the
image, or if there is significant color drift. Delete the checkmark if the image is either
sufficiently bright or overly bright. This option is useful for non-3D as well as 3D.
NOTE: The sync tip clamping option is not used for video sources or any RGB source
with sync information on the video (e.g., sync-on-green).
COLOR ENABLE –
Select which color or colors you want to see, useful while working
with color temperature white levels or input levels.
NOTES: 1) Input levels apply for the current source only, but for any color
temperature used. 2) Assuming that color temperature has been set up based on the
internal test patterns, you can then set up input levels for a given source so that it
matches the color temperature of the internal test patterns.
PEAK DETECTOR –
The Peak Detector is fast method of defining individual input
levels, and may improve the accuracy of input levels set by the Auto Input level
function. Enabling the Peak Detector activates a special operating mode that detects
only pixels that are considered black or white—all other levels are displayed as a
mid-level gray. When used with a 16-step grayscale pattern, where the black and
white bands are known to be at the edges of the image, you can watch these isolated
areas while adjusting individual blacklevels and input drives as necessary. Images
from this source will then display correct blacks and whites without crushing.
See Figure 3.22.
Display a 16 level grayscale test pattern from the desired external source, and
1)
enter a checkmark in the Peak Detector checkbox. NOTE: The "Peak Detector"
will initially render the grayscale as a uniform gray field before adjustment.
2) Display one primary color (use Color Enable to select).
3) For the current color, adjust its corresponding "Blacklevel" slidebar just until a
single band of black appears at one edge of the screen. This band represents the
first band of the grayscale pattern, which should be 100% black. Do not adjust
too far.
With the same color still active, adjust its corresponding "Input Drive" slidebar
4)
just until a single band of white appears at the opposite edge of the screen. This
band represents the last band of the grayscale pattern, which should be 100%
white. Do not adjust too far.
5) Go back and check the black band—adjust the blacklevel slidebar if necessary.
Adjustments are related, so you may have to go back and forth until both bands
are just optimized.
Repeat Steps 2-5 with the other two remaining primary colors. When each
6)
primary color shows one optimized black band and white band, the input levels