Quantum Data 801GC, 801GF, 801GX Owner's And Programmer's Manual page 78

LinFocus — contd.
Test
Test
Purpose
Method
4-40
Chapter 4: Built-In Images
The image also includes blocks of
f o c u s - c h e c k i n g c h a r a c t e r s
various locations. The blocks are
positioned inside the crosshatch
b o x e s a n d a r e u p t o 3 b y 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.
Linearity adjustment
Please see the discussion of the Linearity test image
for information on measuring linearity.
Focus adjustment(s)
An out-of-focus monitor displays fuzzy graphic
images and poorly formed, hard-to-read characters
when text is displayed on the screen.
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.
Model 801GC, 801GF & 801GX¥Rev. X1
a t
533101
/8 /7 /6 /5 /4 /3 /2 1X 2X 3X 4X 5X 6X 7X 8X