Runco Q-750I operation manual Typical Pluge Pattern for Adjusting Brightness

Operation

Brightness: On your external test pattern source, select a PLUGE pattern. (PLUGE is an acronym for “Picture Line-Up Generation Equipment.”) Figure 4-3shows a typical PLUGE pattern.

Below Black

Above Black

Figure 4-3. Typical PLUGE Pattern for Adjusting Brightness

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 Main menu. Use the or buttons to adjust the level 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 4-4.

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

Select Contrast from the Main menu. Use the or buttons to adjust the contrast up until the top two bars become almost the same brightness, then down just until the brightness change between these bars is consistent with the other bars.

Q-750i Series Installation/Operation Manual 51