VP400 Series Video Pro
Form7343A
Operation Manual
20
Crosshatch
Pattern Description
:
16 white horizontal lines and 12 white vertical lines form square boxes on a black background
(32 horizontal by 18 vertical lines in HD modes), with a white dot in the center of each box.
Pattern Usage
:
The Crosshatch pattern is used to check and adjust
convergence of red, green and blue pictures. The
horizontal and vertical lines are usually best
observed to detect color fringing resulting from
misconvergence, and the dots are usually best
observed to make fine adjustments.
Even if a display device provides an internally-
generated crosshatch pattern for checking
convergence, it is often best to double-check the
convergence with an externally-generated pattern.
Occasionally, a display’s convergence on an internally-generated pattern doesn’t match its
convergence on external input video signals.
Converge
Pattern Description
:
This pattern produces 9 horizontal lines and 17 vertical lines, forming square boxes on a black
background. The lines produced are not white, but are broken into 3 equal segments that
alternate between red, green and blue between intersecting lines. The resulting boxes have equal
distance sides each with red, green and blue segments. The colored line segments alternate to
give each box a red upper left corner and a blue lower right corner.
Pattern Usage:
Use to color converge a display throughout the
entire picture area. When converged, the red,
green and blue segments should form straight
lines of equal thickness. The intersections of
lines clearly show variations or steps from the
straight ideal color converged lines. Use the
color gating feature in the Gating menu to turn
any one of the colors on and off for better
indication of mis-convergence.
