Runco LS-3 Series Installation & Operation Manual page 62

Operation
Brightness: On your external test pattern source, select a PLUGE pattern. (PLUGE is an
acronym for "Picture Line-Up Generation Equipment.") Figure 4-3 shows 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.
46 Runco LS-3/LS-5 Installation/Operation Manual