Operation

PLUGE patterns vary but generally consist of some combination of black, white and gray areas against a black background. The example above includes two vertical bars and four shaded boxes.

Select Brightness from the Picture Adjust menu. Using the left- and right-arrow ( ) buttons, adjust the brightness so that:

The darkest black bars disappear into the background.

The dark gray areas are barely visible.

The lighter gray areas are clearly visible.

The white areas are a comfortable level of true white.

The image contains only black, gray and white (no color).

Contrast: On your external test pattern source, select a stepped, gray-bar pattern like the one shown in Figure 4-3.

Figure 4-3. Typical Gray Bar Pattern for Adjusting Contrast

Select Contrast from the Picture Adjust menu. Using the left- and right-arrow ( ) buttons, adjust the contrast to a point just below which the white rectangle starts to increase in size.

Brightness and contrast controls are interactive. A change to one

Note may require a subtle change to the other in order to achieve the optimum setting.

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Runco CX-52HD/CX-57HD Owner’s Operating Manual

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Runco CX-52HD, CX-57HD manual Typical Gray Bar Pattern for Adjusting Contrast