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Chapter 1 • Introduction and Features
Extron • System 4
xi
Switcher Series • User’s Manual
System 4xi Features
Universal Video Inputs
The System 4xi 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 4xi is compatible with all standard video formats including NTSC
3.58, NTSC 4.43, PAL and SECAM.
Balanced/Unbalanced Audio Inputs
Every System 4xi 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 4xi 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 4LDxi and 4LQxi.
Built-In Line Doubler/Quadrupler (scan doubler/quadrupler)
The System 4LDxi and 4LQxi include a built-in NTSC or PAL compatible line
doubler or line quadrupler (4LQxi 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 4xi makes it two to three
times the performance of any other presentation switcher.
LCD Menu-Driven Picture and Programming Controls
The System 4LDxi ’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 4xi 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 4xi 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 4xi 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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