Christie Mirage 5000 User Manual download pdf (Page 52)

Section 3: Operation

3-30

User’s Manual

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 a fast method for defining individual input

levels, and can improve the accuracy of input levels set by the Auto Input level

function. Enabling the Peak Detector activates a special operating mode for detecting

only pixels that are considered black or white—all other levels are displayed as a mid-

level gray. When used with a smooth grayscale pattern in which black and white are

known to be at opposite edges of the image, you can watch these isolated areas while

adjusting individual blacklevels and input drives until both black and white edges are

just visible and distinguished from neighboring pixels. Images from this source will

then display correct blacks and whites without crushing.

See Figure 3.13. Adjusting Input Levels Using the Peak Detector

1. Display a 16 level grayscale test pattern from the desired external source, and

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.

4. With the same color still active, adjust its corresponding “Input Drive”

slidebar just until a single band of color appears at the opposite edge of the

screen. This band represents the last band of the grayscale pattern, which

should be 100% white (or the current color, if a certain color is enabled). Do

not adjust too far.

5. Go back and check the black band—adjust the blacklevel slidebar if

necessary. Blacklevel and Input Drive adjustments are related, so you may

have to go back and forth until both bands are just optimized.

6. Repeat Steps 2-5 with the other two remaining primary colors. When each

primary color shows one optimized black band and white (or colored) band,

the input levels for this source are correctly set. Upon exiting the Input Levels

menu, the Peak Detector checkbox will clear.

Figure 3.13. Adjusting Input Levels Using the Peak Detector

(RED EXAMPLE SHOWN)

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Christie Mirage 5000 User Manual Page 52