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SYSTEM 4LDxi – LINE DOUBLER WITH BUILT-IN SWITCHER
Universal projector
control
Video or S-Video
line doubler
Quad Standard decoder
(NTSC 3.58, NTSC
4.43, PAL & SECAM)
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
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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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FEATURES (Cont.)
n Quad-standard decoder– The System 4LDxi is
compatible with all standard video formats
including NTSC 3.58, NTSC 4.43, PAL and
SECAM.
n Built-in line doubler– The System 4LDxi
includes a built-in line doubler which eliminates
scan lines on video images by doubling the number of lines displayed. The input video (15.7
kHz) is converted to a 31.5 kHz RGB line doubled analog signal.
n Three-line adaptive comb filter– A built-in three-
line adaptive comb filter helps provide crisp, stable output from the System 4LDxi .
n Motion mode compensation– The System 4LDxi
line doubler has motion mode compensation to
eliminate the "jaggies” which are commonly
associated with enhanced video such as line
doubling.
n Universal inputs–The System 4LDxi has four
universal inputs capable of accepting all computer
RGB signals, composite video and S-Video
standard signals (NTSC, PAL and SECAM). No
optional modules are needed for each input signal
type. Looping capabilities allow for up to 22
inputs.
n Balanced/unbalanced stereo audio inputs– Every
System 4LDxi is capable of switching up to four
balanced or unbalanced stereo audio signals.
Input through professional captive screw terminals, audio can be switched to follow any video or
RGB input signal or “broken away” for maximum
flexibility.
n Triple Action Switching™(
RGB delay switching)–
Exclusive to Extron, this unique delay switching
feature in the System 4LDxi makes it possible to
have “seamless” switching for all projector models.
This is done by a triple-action switch. When an
input is selected (either by front panel or RS-232),
the RGB video is turned “off” and sync is left on,
then sync is switched to the new source and finally, RGB video is turned back “on.” This makes
“glitch free” switching possible with every projector on the market.
n
LCD menu-driven picture and programming controls–
The System 4LDxi has an LCD menu that makes
set-up and programming of its many features or
functions simple. An alpha-numeric display allows
for any of the line doubler controls such as color,
hue, contrast and detail to be adjusted and stored in
memory for each input.
n Sync polarity programming– The output sync polar-
ity of the System 4LDxi may be programmed to be
either positive or negative going for both horizontal
and vertical sync signals, ensuring that any projector
will differentiate the line doubler’s output from a
640 x 480 VGA or 31.5 kHz computer signal.
n Universal projector control– Extron’s System 4LDxi
is fully compatible with all digitally controlled projectors. Using the projector-brand remote control,
the System 4LDxi can be made to switch inputs,
power “on” or “off ” the projector, mute the audio or
video signals and switch the four inputs. This may
also be accomplished by using the System 4LDxi
front panel controls or through a third party control
system via RS-232, in order that the switcher is able
to “talk” to the projector.
n Universal compatibility–The System 4LDxi com-
municates using the projector manufacturer's remote
control with all digitally controlled projectors on the
market today such as Ampro, Barco, Electrohome,
Hughes/JVC, Mitsubishi, NEC, Panasonic, Runco,
SELECO, Sony and Toshiba as well as the
Mitsubishi XC Series monitors.
n RS-232 control– The System 4LDxi has built-in
RS-232 control for third party control of any of its
features or functions. Extron has also developed a
free Windows
®
based control program which allows
the 4LDxi to be controlled with a remote PC.
n 300 MHz (-dB) RGB video bandwidth–The 300
MHz bandwidth of the System 4LDxi allows for the
connection of video signals and super high resolution computers such as SUN, Silicon Graphics,
VESA, M
AC/Quadra, SuperVGA, PowerMAC, Power
PC, HP, NCD, Chromatics and DEC workstations.
This ensures the highest resolution possible for any
application.
n RGBS or RGBHV output– The System 4LDxi con-
verts all video inputs to an RGB output. This one
output (RGBS or RGBHV) makes the System
4LDxi easy to connect all video signals to any projector brand through one cable.
FEATURES
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EXTRON ELECTRONICS/RGB SYSTEMS, INC.
1230 South Lewis Street, Anaheim, CA 92805
800.633.9876 714.491.1500 FAX 714.491.1517
U.S.A.
EXTRON ELECTRONICS, EUROPE
Beeldschermweg 6C, 3821 AH Amersfoort
+31.33.453.4040 FAX +31.33.453.4050
The Netherlands
EXTRON ELECTRONICS, ASIA
41B Kreta Ayer Road, Singapore 089003
+65.226.0015 FAX +65.226.0019
Singapore
EXTRON ELECTRONIC INFORMATION
EXTRONWEB™: www.extron.com
EXTRONFAX™: 714.491.0192
24-hour access—worldwide!
89-02
68-372-01
REV. A
APPLICATION DIAGRAM
Control
System
Large Screen
Projector
VCR/VTR with Audio
Laserdisc Player
with s-VHS Outputs
and Sterio Audio
SGI/SUN
Workstation
PC or Workstation
with Audio
Stereo Audio
INPUT 1 INPUT 2
AUDIO
AUDIO
INPUT 3
AUDIO
INPUT 4
AUDIO
OUTPUT
AUDIO
RGB
Interface
RGB
Interface
SPECIFICATIONS SPECIFICATIONS (Cont.)
Inputs
RGB Video
Bandwidth................................ 300 MHz (-3 dB)
Return loss at 10 MHz ............ 25 dB
Crosstalk at 10 MHz ................ -35 dB
Isolation at 10 MHz ................ 55 dB
Audio
Type.......................................... 4 inputs, two channel, balanced
Connectors .............................. Captive screw connector,
6 conductor
Impedance................................ >10 k ohm, AC coupled
Maximum level
(balanced or unbalanced).......... 11.2 dBu
CMRR...................................... >60 dB typical
Audio throughput
Routing .................................... 1 of 4 two channel routing
Response .................................. ±.05 dB 20 Hz to 20 kHz
Gain adjustment ...................... -95.5 dB to +31.5 dB,
both left and right channels
per input
THD + Noise .......................... 0.002% worst case,
+10 dBu input, +10 dBu output,
balanced input and output
Signal to noise ratio.................. >95 dB, 0 dB reference
Adjacent input isolation............ Better than 85 dB from
20 Hz to 20 kHz
Stereo channel separation.......... 60 dB from 20 Hz to 20 kHz
Outputs
Sync output frequency
NTSC 3.58/4.43 ........................ 31.5 kHz horizontal
60 Hz vertical
PAL/SECAM .............................. 31.5 kHz horizontal
50 Hz vertical
*when VGA mode is active vertical frquency forced to 60 Hz with any video input
Connectors .............................. Female BNC’s
Impedance................................ 75 ohms video, 510 sync
Audio output
Type ........................................ 1 output, two channel balanced
Connectors .............................. Captive screw connector,
6 conductor
Impedance................................ 50 ohms capable of
driving 600 ohms
Audio gain
Output taken single ended........ 0 dB channel throughput gain
Output taken differentially ...... +.6 dB channel throughput gain
Gain error ................................ ±0.2 dB channel to channel
Muting...................................... >95 dB
Drive ........................................ +11.2 dBu into 600 ohms
Power supply ................................ 100 - 240 VAC 50/60 Hz
(auto-switchable)
Power consumption...................... 30 watts
Operating temperature ................ 0˚ - 50˚ C (32˚ to 122˚ F)
Storage temperature .................... -20˚ to +70˚ C (-4˚ to +158˚ F)
MTBF (demonstrated) ................ 30,000 hours
Approved...................................... UL & CE Listed
Dimensions.................................. 1.74"H x 19"W x 16.2"D
4.4H x 48W x 41D cm
Shipping weight .......................... 21 lbs. (9.5 kg)
Warranty ...................................... Two years, parts & labor
Part number ................................ 60-155-01
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