Extron Electronics VTG 200 User Guide - Manual (Page 15)

Extron • VTG 150 & VTG 200 • User’s Manual Extron • VTG 150 & VTG 200 • User’s Manual
Application Information
Page 4-6
Figure 4-6A VTG 200 Dot Pattern
Video Setup Guide
If the application is a video system, including components,
such as interfaces, distribution amplifiers, etc., use the VTG
as the computer/video source. Route the signals from the
VTG, through the other components, to the projector. This
provides total duplication of the system, allowing the
interface, or other components, to be setup as part of the
system. (i.e. H & V shift, level control, peaking, etc.)
Lens Focus - For this adjustment, use the dot test pattern (#1).
The output color(s) of the VTG can be changed to focus each
color lens, one at a time. (See figure 4-6A)
Convergence - Color convergence can be aligned using either the
projector's internal test pattern, or the VTG test patterns. Use
crosshatch and dot patterns (1, 6, & 7) for convergence. (See
figures 4-5A and 4-6 A)
Geometry - The geometry can be done using the crosshatch and
crosshair patterns. The linearity and borders (picture size and
raster centering) can be adjusted with the rectangle/square
crosshatch pattern (patterns 4, 5, 6 & 7).
Grayscale - Grayscale, color balancing, and any other color
adjustments can be made using the grayscale and color bar
patterns. Red, green, and blue video levels can be mixed to
provide an accurate simulation of the computer’s display.
These adjustments are difficult to make and should be done
with care.
100-240 VAC
Application Information
Page 4-5
Figure 4-5A VTG 200 Checkerboard Test Pattern
Setting Up Large Screen Projection Systems
The video test generator may be used to set the parameters
of large screen video/data projectors. These parameters
include convergence, geometry, linearity, grayscale, contrast,
brightness and focus.
For each application, a digital projector requires a separate
set of signals from each computer/video source. It may not be
convenient to have all of these sources available when
setting up the projector. The VTG simulates most video scan
rates, providing one source for all of the required sync and
video signals.
100-240 VAC