Wyse WY-60 Maintenance Manual page 63

This pattern is an 80 or 132-column display of characters. (Hold
the CTRL key and press the S key to toggle between 80 and 132
columns.) Three blocks in the center of the pattern indicate
brightness: bright, normal, and dim.
Pattern 0
Pattern 0 helps you detect and correct pincushion, tilt,
centering, and size problems. See Figure 4-7.
This pattern is a full-inverse, normal intensity display in the
8o-column format. Two pairs of parallel lines cross in the
center, making four quadrants. Two additional vertical lines,
one on either side of the pattern, indicate brightness intensity
levels.
Figure 4-1 Pattern 0
Pincushion Pattern
-
- - -
-
-
-
-
-
-
-
-
== ==
~ ~
=
=
! i
-
-
!
-
=
-
Linearity. Centering, Size
You can verify the display tolerances using both patterns along
with a display reticle. See Appendix D for reticle instructions.
4-16