Geometry Controls - Silicon Graphics C220 User Manual

Controls (continued)
Color Control System
Color presets 1 through 5 selects the desired color setting. The bar is replaced by the color setting choice from 1, 2, 3, sRGB,
5. Each color setting is adjusted at the factory to the stated Kelvin degrees. If a setting is adjusted, the name of the setting will
change from Kelvin to Custom.
NOTE: sRGB does not allow you to adjust each color.
Red, Green, Blue: Color Control System decreases or increases the monitor's red, green or blue color guns depending upon
which is selected. The change in color will appear on screen and the direction (decrease or increase) will be shown by the
bars.
NOTE: sRGB does not allow you to control the Color, Brightness and Contrast.

Geometry Controls

Geometry Controls Menu
The Geometry controls allow you to adjust the curvature or angle of the sides of your display.
In/Out (pincushion): Decreases or increases the curvature of the sides either inward or outward.
Left/Right (pincushion balance): Decreases or increases the curvature of the sides either to the left or right.
Tilt (parallelogram): Decreases or increases the tilt of the sides either to the left or right.
Align (trapezoidal): Decreases or increases the bottom of the screen to be the same as the top.
Rotate (raster rotation): Rotates the entire display clockwise or counterclockwise.
Corner Correction: Allows you to adjust the geometry of the corners of your display — Top, Top Balance, Bottom or
Bottom Balance.
Tools 1
Moiré Canceler: Moiré is a wavy pattern which can sometimes appear on the screen. The pattern is repetitive and superim-
posed as rippled images. When running certain applications, the wavy pattern is more evident than in others. To reduce moiré,
adjust the level by using the –/+ CONTROL buttons.
Convergence: Aligns all three colors (R,G,B) to form a single color (white). The purpose of this control is to ensure that a white
line drawn on the screen is as crisp and clear as possible.
• Use the CONVERGENCE (HOR.) control to adjust the alignment of the white lines in the left/right direction.
• Use the CONVERGENCE (VER.) control to adjust the alignment of the white lines in the up/down direction.
• Use the V-CONVERGENCE-TOP control to adjust the alignment of the top area of the white line in the up/down direction.
• Use the V-CONVERGENCE-BOTTOM control to adjust the alignment of the bottom area of the white line in the up/down
direciton.
Linearity: This selection allows you to adjust the spacing of the area on the screen. The purpose of this control is to ensure that a
one-inch circle is a true one-inch circle wherever it is on the screen. The best way to determine the vertical linearity is as follows:
• Draw equally spaced horizontal lines using a drawing application that has a ruler.
• Use the Vertical Balance control to adjust the lines near the top and bottom of your screen.
• Use the LINEARITY (VER.) control to adjust the spacing between the lines near the center and top of your screen.
Corner Purity Control: Eliminates picture impurities that may result from the earth's magnetic field. While in the sub-menus
(TL: Top Left, TR: Top Right, BL: Bottom Left, BR: Bottom Right or L/R: Left/Right, use the –/+ control buttons to fine tune
the Corner Purity corrections.
NOTE: We recommend that you perform Corner Purity correction while running a typical application such as a
spreadsheet or text document.
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