Quantum Data 801GC, 801GF, 801GX Owner's And Programmer's Manual page 70

Test
Purpose
Method
4-32
Chapter 4: Built-In Images
Aspect Ratio Hatch_10
Boxes Boxes
W : H Decimal
Vertically Horizontally
16 : 9 1.777É 10
5 : 3 1.666 É 10
4 : 3 1.333 É 10
1 : 1 1.000 10
3 : 4 0.750 14
Convergence adjustment (color monitors only)
In order to accurately produce an image on a color
monitor, the three electron beams in the CRT must
meet (converge) at the exact same location at the
same time. Lines displayed on a misconverged
monitor appear as several multicolored lines and
the transitions between different colored areas
contain fringes of other colors.
T h e c o n v e r g e n c e a d j u s t m e n t s o f m o s t c o l o r
monitors fall into two main categories.
The first set of adjustments, usually called Static
Convergence, aligns the three beams in the center
of the display. The idea is to turn on all three
g u n s a n d a d j u s t t h e v a r i o u s m a g n e t s o n t h e
convergence assembly to produce all white dots
in the center of the display. The convergence
assembly is located on the neck of the CRT.
Different monitors and CRT types may each require
their own magnet adjustment sequence.
After the center of the display is properly converged,
the outer areas are adjusted by using the monitor's
Dynamic Convergence controls. The number of controls,
the area of the screen they affect, and their adjustment
procedure depends on the monitor you're testing.
Model 801GC, 801GF & 801GX¥Rev. X1
Hatch_12 Hatch_24
Boxes Boxes Boxes
Vertically Horizontally Vertically
16 10 16 18
16 10 16 18
14 12 16 24
10 12 12 24
10 16 12 32
Boxes
Horizontally
32
30
32
24
24