Extron electronic RGB 202 VS SL2 About this manual, Introduction to RGB Interfaces, Problem

Introduction • Features and Specifications

Reference Information Troubleshooting

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”.

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.

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.

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.

	2.	Output level is too	2. Adjust the Level/Boost
	high.		counterclockwise.
Unstable image	1.	Sync on Green with	1. Make sure that Peaking Control
on Data Display	high sync levels on		is fully ccw for short cable runs.
	short cable runs.
	2.	Serration Pulses are	2. Turn DIP switch (#5) ON to
	present at the output.		remove the Serration Pulses.
	3.	Signal not terminated	3. See projector documentation on
	at projector.		termination.
Severely or	Signal needs horizontal		Change Jumper #31 setting (See
unreadable image clamping.			page B8.

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