User manual

The System 7SC provides two methods of
projector control—RS-232 or IR. There are also
two methods of configuring the switcher for
projector control. The first consists of
downloading pre-configured control drivers
from the Extron Web site. Downloading these
drivers will require use of the easy-to-use
control software that ships with this switcher.
For situations where more customizable
projector control is desirable, the second
method of configuration is available. Installers
can customize the System 7SC through IR
learning or by entering custom, uni-directional
RS-232 commands. These commands can be
programmed to any button on the front panel.
Creating custom projector control drivers is
simple with the System 7SC. All that’s needed
are projector codes (found in the projector
manual), a computer, a few cables, and the
supplied control software. (See
Figure 4 below.)
January/February 2001 ExtroNews 12.1 3
accept composite video, S-video, and RGB
video. Each input also accepts stereo audio. The
switcher’s line doubler increases the horizontal
scan rate of the input signal by two times,
making the output comparable to a 640 x 480
VGA signal.
To control projectors through the System
4LDxi, Extron engineers develop code for each
projector on the market. When ordering a
System 4LDxi, customers must indicate what
projector it will be working with. The switcher
is then configured for a specific projector
before it ships from Extron’s facility. These units
communicate with projectors via RS-232 using
a projector-specific communication adapter.
If a projector is replaced in an installation,
this switcher can be easily upgraded in the field
to work with the new device. Often, all that is
required is a quick adjustment to internal rotary
switches. In some cases, updating the switcher
firmware may be necessary. If so, Extron can
supply an appropriate firmware upgrade that
can be plugged into the switcher
(see
Figure 3).
The comm adapter, which is used to
physically connect to the projector, may or
may not have to be changed to be
compatible with the new projector. Your
Extron Customer Support Representative will
be able to tell whether or not your existing
comm adapter will work.
System 7SC Switcher with Video Scaler
The new System 7SC is a seven input, dual
output multi-format switcher with a built-in
video scaler. This switcher is ideal for rental,
staging, and permanent installations using all
types of high-resolution video display
devices. Six inputs are configurable for
composite video, S-video, component, or
RGB video. The seventh input on the front
panel is a quick connection point for
composite video, S-video, or computer-video.
Each input also accepts audio.
Like Extron’s other system switchers, the
System 7SC’s functions can all be addressed
via RS-232. This makes changing out the
projector in applications that use a control
system very easy. To maintain projector
control, simply download a different
projector driver to the switcher.
The System 7SC also includes two room
control features. These room control features
can be programmed to control the lighting,
raising and lowering of the screen, opening
and closing of the window blinds, etc. Universal
projector control coupled with the room
control features makes the System 7SC an all-
in-one solution for more complex application
environments. (See
Figure 5 above.)
Extron’s system switchers provide a
universal solution to projector control.
Whatever the application, these switchers
make universal projector control a snap.
Align Notches
IC Chip w/ Projector Code
Screen Control
Projector
Control
RGB/Video
Audio
Lights/Room Control
System 7SC
VCR
DVD Player
Document
Camera
Laptop
Computer
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Computer
Projector User
Manual
Projector Control Code
Switcher Projector
PWR ON: 02 00 01 00
PWR ON: 02 00 01 00
SYSTEM 7SC
COMPUTERS-VIDEO
LR
VIDEO AUDIO
INPUT 7
CONTROL
IRDISPLAY
VOLUME
RX LEARN
TX
RX
ADJUST
DETAIL
NEXT
CONT
MENU
BRIGHTTINTCOLOR
DISP
PWR
DISP
MUTE
MODE
ROOM
1
ROOM
2
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Figure 3. Updating firmware in Extron's system
switchers is a snap.
Figure 5. Universal projector
control with room control
features makes the System 7SC
an all in-one solution for
complex applications.
Figure 4. Creating custom projector control drivers with the System 7SC.