Quantum Data 881 User Manual
Page 1162
1046
Appendix B Image Reference
The primary version of the Hatch_10i image is shown below.
Test
Convergence adjustment (color monitors only)
Purpose
To accurately produce an image on a color monitor, the three electron beams in the CRT
must meet (converge) at the same location at the same time. Lines displayed on a
misconverged monitor appear as several multi-colored lines, and the transitions between
different colored areas contain fringes of other colors.
Method
The convergence adjustments of most color 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. This method involves turning on all three guns and adjusting the
various magnets on the 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 depend on the monitor under test.
Aspect Ratio
Dot_10
Dot_12
Dot_24
W : H
Decimal
Boxes
Vertically
Boxes
Horizon-
tally
Boxes
Vertically
Boxes
Horizon-
tally
Boxes
Vertically
Boxes
Horizon-
tally
16 : 9
1.777 Й
10
16
10
16
18
32
5 : 3
1.666 Й
10
16
10
16
18
30
4 : 3
1.333 Й
10
14
12
16
24
32
1 : 1
1.000
10
10
12
12
24
24
3 : 4
0.750
14
10
16
12
32
24