Quantum Data 801GC, 801GF, 801GX, Owner'S And Programmer'S Manual

Page: 70 / 356

4-32
Chapter 4: Built-In Images
Model 801GC, 801GF & 801GX¥Rev. X1
Aspect Ratio Hatch_10 Hatch_12 Hatch_24
W : H Decimal
Boxes
Vertically
Boxes
Horizontally
Boxes
Vertically
Boxes
Horizontally
Boxes
Vertically
Boxes
Horizontally
16 : 9 1.777É 10 16 10 16 18 32
5 : 3 1.666 É 10 16 10 16 18 30
4 : 3 1.333 É 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
Test Convergence adjustment (color monitors only)
Purpose 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.
Method 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.