Extron electronic System 4LD xi User Manual

SYSTEM 4LDxi – LINE DOUBLER WITH BUILT-IN SWITCHER
Universal projector
control
Video or S-Video
line doubler
Quad Standard decoder
(NTSC 3.58, NTSC
Three line adaptive
comb filter
Motion mode compensation
RGsB, RGBS or
RGBHV outputs
RS-232 control
Sync polarity
programming
Triple Action
Switching
300 MHz (-3dB)
video bandwidth
Balanced/unbalanced
stereo audio inputs
Rack mountable
Extron’s System 4LDxi is a line doubler with a built-in,
four-input switcher. It provides universal projector con­trol and is compatible with most digitally controlled data grade projector on the market today. The System 4LDxi is also quad-standard compatible with NTSC
3.58, NTSC 4.43, PAL and SECAM for use with all international video formats.
Line doubling increases the horizontal scan rate by a factor of two (to 31.5 kHz) and allows most CRT’s to obtain a range of optimum efficiency, maximizing light output. This light output is much brighter than stan­dard NTSC, PAL, or SECAM displays. In addition to increased picture brightness, the image becomes smoother and has greater clarity.
Extron’s System 4LDxi has a high quality three-line adaptive comb filter which provides a crisp, stable image. In addition, an internal TBC (Time Base Corrector) actually cleans-up low quality videotape sig­nal noise (common to VHS tape players) for a more stable and sharper image. The System 4LDxi also pro­vides motion mode compensation to remove the motion “jaggies” typically found in line doubled video.
In a large-screen venue application, the need for a line doubler becomes increasingly apparent. When display­ing conventional NTSC, PAL or SECAM video onto a large screen, the spaces between scan lines are obvious and make the picture look dark and diminished. The lack of brightness is caused by displaying a low resolu­tion on the larger screen. With the horizontal scan rate increased by two, the System 4LDxi fills in the gaps and the light output is therefore increased. The projec­tor’s light output capacity is now more fully utilized and thus, the overall picture is brighter.
Universal Control
The System 4LDxi includes universal projector control that will operate with most digitally controlled data grade projector on the market today such as Ampro, Barco, Electrohome, Hughes/JVC, Mitsubishi, NEC, Panasonic, Runco, SELECO, Sony and Toshiba, as well
APPLICATIONS
as the Mitsubishi XC Series monitors. The System 4LDxi has four universal inputs capable of accepting all comput­er RGB signals, composite video and S-Video standard sig­nals. Any video or 15.75 kHz RGB signal will be doubled.
The universal projector control function allows bi-direc­tional “talk & listen” communication with most large­screen CRT-based projectors. When connected, the System 4LDxi will be recognized by the projector as the projector’s own brand of switcher. The System 4LDxi can turn the connected projector on or off, switch input memory blocks for convergence, and set-up saved config­urations by input selection of the connected projector. It will then “talk” as well as “listen” to the projector for continuous update changes, feature changes or input selection changes made by the user.
All this makes the System 4LDxi easy to learn, as it works almost identically to the projector-brand switcher. The advantage is one switcher for all projectors; there is no need to learn all the different types of set-up and con­trol functions of each projector-brand switcher that is connected. And it works the same way with all brands– only the internal communications board dip switch set­tings are different. In fact, the System 4LDxi may be controlled via the projector manufacturer’s remote control.
Audio Switching & Processing
The System 4LDxi is also compatible with balanced and unbalanced, two-channel stereo audio. The System 4LDxi has the ability to switch between the four audio inputs. The audio can either follow any video or RGB input signal or can be broken away from the video. With "breakaway" switching, the audio signal may be separated from the video signal to switch either the video only or the audio only. For example, in an application where the user wants to show the video only from input source “one” in conjunction with the audio from input source “two”, the audio would be broken away from source one and source two would be switched to the final output. This provides increased flexibility for all types of profes­sional A/V applications.
APPLICATIONS (Cont.)
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