Clarity SN-4620-1080 manual Adjusting Levels for Analog Computer Sources, Why adjust levels?

3.2.3Adjusting Levels for Analog Computer Sources

This section applies to Analog RGB (computer) pictures only. The Levels are best adjusted semi-automatically.

Why adjust levels?

For analog RGB pictures the levels for black and white vary from one computer to another, or from one video pro- cessor to another. They even vary between video outputs from a multiple-output video card in a computer.

Your pictures will not look their best on Bay Cat X until you adjust for these differences. This is not about adjusting color or contrast. It’s about telling the Bay Cat X what the computer or processor means by black and by white.

Semi-automatic adjustment

1.From the computer source, display an all-black picture. This must come from the computer source that will be used for the program. It does no good to use your lap- top for this adjustment, then connect to a different com- puter for the program. Nor can you use the Bay Cat X’s black test pattern. (Hint: Display a black screen using Windows Paint program.)

✎To adjust levels for UXGA sources that will be displayed in One to One scale mode, perform your adjustments using Fill All scale mode and then switch back to One to One.

2.Press MENU.

w

Main Menu

Picture

Size & Position

Aspect Ratio & Wall

Memory

Diagnostics

Advanced Options“

Program Information

3. Select Picture, and press ENTER.

Picture

Source			Analog
Colorspace			RGB
Sync Type	Separate H&V
Vertical Frequency (frame locked)			60Hz
Horizontal Frequency		50.00kHz
Pixel Frequency		80.10MHz
Horizontal Resolution		1366
Vertical Resolution		768
Frequency			1602
Phase			22.5°
Sharpness		Sharpest
Input Levels

4. Select Input Levels and press ENTER.

Input Levels

Auto Black Level (offset)

Auto White Level (gain)

Center Point	64	124 99
Black Level (offset)-All			79
Red			89
Green			67
Blue			83
White Level (gain) -All			99
Red			99
Green			99
Blue			99

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