Quantum Data 801GC - Manual (Page 62)

4-24 Chapter 4: Built-In Images Model 801GC, 801GF & 801GX¥Rev. X1
Focus_@6, Focus_@7, Focus_@8
Description In the primary versions, the screen is filled with
white “@” characters on a black background. Bit
maps of a single character for the three different
images are shown here.
The secondary versions are drawn with black
characters on a white background.
Test Focus adjustment(s)
Purpose An out-of-focus monitor displays fuzzy graphic
images and poorly formed, hard-to-read text
characters.
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 that they affect
depend on the monitor you’re testing.