Christie Roadie HD+35K Manual do Utilizador descarregar pdf (Página 97)

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

EXIT. 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.

•

CONT = 50 (approx.)

• BRIGHT = 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.

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