Cross Hatch and Dot Test (1024 x 768) September 16, 1998 Use the following pattern to check and adjust geometric distortion, focus, beam shape, and convergence or color registration. It is not the best or most sensitive test for any of these individual attributes but is still quite useful as a broad indicator. What to look for: Use the cross hatch pattern to check for geometric distortion. All of the boxes should be the same size and appear perfectly straight, parallel, and square. Use the vertical and horizontal lines to check for color mis-registration, which appears as colored fringes on the outside edges of a line. Use the dots in the center of the squares to check focus, beam shape, and color registration. All the dots should be sharp, perfectly round, and the same size, and not show any colored fringes. What you can do: Use any available linearity controls, such as pincushion, trapezoid, or keystone, to minimize geometric distortion. Reducing the image size will also generally reduce the distortion. Use any convergence controls your monitor offers to minimize color misregistration. Changing the position and orientation of the monitor may help. Steel furniture and any electrical appliance that generates a magnetic field, such as fans, phones and speakers, may affect color registration. Use your monitor's focus control to adjust for the best overall dot size and shape. Beam shape and size is generally poorest near the corners of the screen.
