Vidikron VP-4200 用户指南

Sharpness: “Sharpness” is the amount of high-frequency detail in the image. To adjust 
sharpness, select Sharpness from the Picture menu and press SET. On your external test 
pattern source, select a pattern like the one shown in Figure 4-6. Adjust as needed, looking 
for white edges around the transitions from black to gray and different sized lines in the 
“sweep” patterns at the top and bottom. Lower the sharpness setting to eliminate them. 

White Balance (Installer Adjust mode): Select White Balance from the Installer 
Adjust/Picture menu to remove any trace of color from the white areas of the image. 

• Gain: Use the Gain controls to correct color imbalances in the bright areas of the image. A 

good way to do this is to use a test pattern consisting mostly of solid white areas, such as 
an 80 IRE “window” pattern. If the white areas contain traces of red, green or blue, 
decrease the Gain for that color.

• Offset: Use the Offset controls in the White Balance sub-menu to correct color imbalances 

in the dark areas of the image. A good way to do this is to use a test pattern consisting 
mostly of dark gray areas, such as a 30 IRE “window” pattern. If the gray areas contain 
traces of red, green or blue, decrease the Offset for that color.

To reset the white balance settings to the factory default values, select White Bal. Reset. 
Then, press 

 to highlight YES and press SET. 

Select Return to exit the White Balance menu.