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Test
Purpose
Method
882 Video Test Instrument User Guide (Rev A.35)
The primary version of the Hatch_10i image is shown below.
Aspect Ratio
Dot_10
W : H
Decimal
Boxes
Vertically
16 : 9
1.777 É
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)
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.
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.
Dot_12
Boxes
Boxes
Boxes
Horizon-
Vertically
Horizon-
tally
tally
16
10
16
16
10
16
14
12
16
10
12
12
10
16
12
Dot_24
Boxes
Boxes
Vertically
Horizon-
tally
18
32
18
30
24
32
24
24
32
24
917
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