Quantum Data 801GC, 801GF, 801GX manual LinFocus contd

LinFocus — contd.

The image also includes blocks of
focus - checking characters at	533101
various locations. The blocks are
positioned inside the crosshatch	/8	/7	/6	/5	/4	/3	/2 1X 2X 3X 4X 5X 6X 7X 8X
boxes and are up to 3 by 3
characters in size. The size of the
blocks is limited by the number of

characters that can fit in one box. The bit map of a single focus character is shown here.

	The primary version consists of a white pattern
	on a black background. The secondary version has
	a black pattern on a white background.
Test	Linearity adjustment
	Please see the discussion of the Linearity test image
	for information on measuring linearity.
Test	Focus adjustment(s)
Purpose	An out-of-focus monitor displays fuzzy graphic
	images and poorly formed, hard-to-read characters
	when text is displayed on the screen.
Method	On monitors with a single (static) focus adjustment,
	adjust the control for the best average focus over
	the entire screen. The focus at certain locations of
	the screen should be within specified limits.
	Some monitors have a static and one or more
	dynamic focus controls. The sequence for adjusting
	them and the areas of the screen they affect depend
	on the monitor you’re testing.

4-40 Chapter 4: Built-In Images Model 801GC, 801GF & 801GX¥Rev. X1