Chapter 1 • Introduction and Features
Extron • System 4
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Switcher Series • User’s Manual
System 4
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Features
Universal Video Inputs
The System 4
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has four universal inputs, each capable of accepting all computer
RGB signals from 15 kHz to 150 kHz, any composite video standard signals
(NTSC or PAL) and S-video (S-VHS) signals. There are no optional modules to
purchase for each input signal type.
Quad-standard Decoder
The System 4
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is compatible with all standard video formats including NTSC
3.58, NTSC 4.43, PAL and SECAM.
Balanced/Unbalanced Audio Inputs
Every System 4
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is capable of switching up to four balanced or unbalanced, left
and right stereo audio signals. Audio, input through professional-style captive
screw connectors, can be switched to follow any video or RGB input signal, or it
may be switched separately for added flexibility (see “Breakaway” below).
Audio Follow/Breakaway
When switching inputs, the System 4
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can either select audio and video from the
same source (Audio Follow) or select audio from one source and video from
another (Breakaway).
Three-line Adaptive Comb Filter
A built-in, three-line adaptive comb filter helps to provide a crisp, stable output
from the System 4LD
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and 4LQ
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.
Built-In Line Doubler/Quadrupler (scan doubler/quadrupler)
The System 4LD
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and
4LQ
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include a built-in NTSC or PAL compatible line
doubler or line quadrupler (4LQ
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only) that is capable of line-doubling/
quadrupling composite video, S-video or RGB video (Targa or document
camera) signals. The signal also passes through a digital noise filter to improve
the picture. The line-doubled/quadrupled output results in a sharper image with
less noticeable scan lines and “video noise.”
300 MHz RGB Video Bandwidth
The 300 MHz RGB video bandwidth of the System 4
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makes it two to three
times the performance of any other presentation switcher.
LCD Menu-Driven Picture and Programming Controls
The System 4LD
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’s LCD menu makes setup and programming of its features
and functions easy and flawless. An alphanumeric display allows for any of the
line-doubler/quadrupler controls such as color, hue and contrast to be adjusted
to exact specifications for each input.
RGB Output
The System 4
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video output will be RGBS or RGBHV if the selected input is
configured to be line-doubled or line-quadrupled. If the selected input is not
configured to be line-doubled/quadrupled, the output video format will be the
same as the input.
RS-232 Control
The System 4
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has built-in RS-232 control for external/third party control of any
of its features or functions.
Triple-Action Switching™ RGB Delay Switching
Triple-Action Switching makes it possible to have “seamless” picture switching.
The System 4
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may be programmed to switch the RGB signals to the projector
at a specified time after the sync is switched (0 to 5 seconds, in 1/2 second
increments). The audience will briefly see a blank screen while the projector
“locks on” to the input signal.
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