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Gefen
Gefen delivers innovative, progressive computer and electronics add-on solutions
that harness integration, extension, distribution and conversion technologies.
Gefen’s reliable, plug-and-play products supplement cross-platform computer
systems, professional audio/video environments and HDTV systems of all sizes
with hard-working solutions that are easy to implement and simple to operate.
The Gefen 1:2 VGA Hub
The 1:2 VGA Hub allows computers with VGA graphic cards to display a
picture on two VGA displays or projectors simultaneously, making it perfect for
presentations where the operator uses a small monitor at the computer while
the audience views the image on a second larger display or projector.
How It Works
The 1:2 VGA Hub is connected to a PC video source with a VGA (male to female)
cable from the computer’s VGA graphics card port to the VGA Hub’s input con-
nector.
There are two VGA outputs on the 1:2 VGA Hub. VGA output one (Monitor 1)
is the primary connection, which queries the primary sisplay attached to it and
determines the possible video resolutions, timings and frequencies that can be
used to create a picture. This information is called EDID (Extended Display
Identifi cation Data).
VGA output two is connected to the second (Secondary) display and creates an
image by following the EDID settings obtained from the fi rst (Primary) display;
therefore, both displays should be capable of the same resolutions and refresh
rates in order to display an identical picture. For more information regarding
EDID, please read the Operation Notes immediately below this paragraph.
1
INTRODUCTION
