Extron electronics RGB 202 VS SL2 User Manual page 6

Introduction • Features and Specifications
About this manual
This manual was written to explain the features,
installation and operation of Extron's RGB 202xi series of
interfaces. Although the name "RGB 202xi" is used
throughout the manual, it refers to four different interface
models. Chapter 4 covers the differences between the
standard model RGB 202xi and those models with
special features.
Introduction to RGB Interfaces
As you may know by now, an RGB interface provides the
means for getting a computer video output to display on a
large screen. The interface must take the video signals
from the computer and transform them for use by a
projector or data monitor.
In addition to this, the RGB 202xi has many other
enhancement features. This user's manual provides the
technical information required to install and operate the
RGB 202xi Universal Interface. Some places in this
manual it is simply referred to as the "interface".
Interface Considerations
As illustrated above, the interface operates between a
computer (or computers) and a video projector.
Computers differ both in the type of video signals as well
as the physical connectors they use.
Adapters – For this reason, a universal interface requires an
adapter to match the physical and electrical connections
of the computer and the interface.
Local Monitor – Another thing that must be considered is
whether the computer's monitor ("local monitor") will be
used in the application. This is more convenient for the
computer operator, or presenter because it may be
difficult to see the big screen while operating the
computer. If the local monitor is to be used, a Monitor
Breakout Cable (MBC) is required. An MBC adapts the
computer to the local monitor, as well as the interface.
Page 1-1 Extron • RGB 202 xi Series • User's Manual
Reference Information
Problem Probable Cause
Double image on 1. The Horizontal scan
Data Display. frequency of the
computer may be twice
that of the Data
Display.
Vertical Jitter of 1. Computer Source is
Displayed text. Interlaced.
Image on Data 1. Input voltage level is
Display is dim or too low.
not at full
brightness level. 2. Double Termination
at that input (1 or 2) of
the RGB 202xi.
Image on Data 1. No Termination for
Display is too that input.
bright.
2. Output level is too
high.
Unstable image 1. Sync on Green with
on Data Display high sync levels on
short cable runs.
2. Serration Pulses are
present at the output.
3. Signal not terminated
at projector.
Severely or Signal needs horizontal
unreadable image clamping.
Extron • RGB 202 xi Series • User's Manual
Troubleshooting
Solution
1. Incompatibility of Data Display
with computer scan frequency.
1. Turn DIP switch #1 ON (LCD
sync processing).
1. Increase level using Level
Control on front panel. Turn the
knob clockwise.
2. Set termination switch (#7 for
Input #1, or #8 for Input #2) on
Rear Panel OFF for High Z.
1. Connect a local monitor to the
Extron MBC cable monitor input
connector (female).
or -
Set termination DIP switch ON
(#7 for Input #1; #8 for Input #2).
or -
See MBC documentation.
2. Adjust the Level/Boost
counterclockwise.
1. Make sure that Peaking Control
is fully ccw for short cable runs.
2. Turn DIP switch (#5) ON to
remove the Serration Pulses.
3. See projector documentation on
termination.
Change Jumper #31 setting (See
page B8.
Page B-4