Extron electronic 68-392-02 User Manual

User’s Manual

DISPLAY
POWER

VCR DVD Laptop

VOLUME

MAX/

MIN

Extron

Extron

MediaLink Controller

MLC 206

IR Broadcaster

ProjectorExtron

MLC

IR Broadcaster

System Switcher and MediaLink Accessory

68-392-02 Rev. B

Printed in the USA

02 02

Introduction

The IR Broadcaster (part #60-272-02)

The Extron Infrared Broadcaster transmits IR signals that have been
“learned” by an Extron system switcher or Extron MediaLink
Controller (MLC) and that are associated with the front panel
functions. This allows other IR controlled devices in the room to
receive the signal put out by the Broadcaster. Refer to the appropriate
switcher’s or controller’s user’s manual for IR learning procedures.

Pressing buttons on the system switcher’s or controller’s front panel,
or on an Extron IR remote control, SCP control pad, or RS-232 host
causes the IR Broadcaster to broadcast an IR command that is associated
with that button/key. For example, if a command to switch the
projector to RGB mode has been “learned” and associated with an
input selection button, when that button is selected from a panel, the
IR remote control, or from the RS-232 host, that learned command is
broadcast.

The switcher or the controller provides power, an IR signal, and a
ground connection to the IR Broadcaster through a special three­conductor custom cable. The Broadcaster should be placed so that its
signal covers a large area of the room, within the range of the projector
or other devices to be controlled by learned commands.

Front and rear panels

The picture below shows the front and rear panels of the IR Broadcast­er. Place the dark red lens side (front) of the Broadcaster toward the
room so that the projector (or other device) can receive the IR signals.

For some applications it may be desirable to limit the signal broadcast
range. There is a connector on the IR Broadcaster for use with the
standard IR Emitter. If an Emitter is
connected to the Broadcaster, the
switcher or controller sends IR signals to
controlled devices via the IR Emitter, but
not out the Broadcaster’s emitters.

The IR Broadcaster’s own emitter
devices and the responder LED are
shown in the illustration. The emitters
are not easily seen through the dark
lens, but the responder can be seen
when its LED blinks to indicate that an
IR signal has been broadcasted.

Installing and Setting Up the IR Broadcaster

The following illustration shows a typically appllication with an
IR Broadcaster connected to a switcher, and it also shows how the
IR Emitter can be used with the Broadcaster.

Rear

Emitter

IR BROADCASTER

Front

Broadcast Emitters

Comm.

Responder LED

2

IR Broadcaster with Emitter Port • Introduction

CONTROL

DISP

DISP

ROOM1ROOM

MODE

PWR

MUTE

2

1234567

Extron System 7SC

DETAIL

CONT

BRIGHTTINTCOLOR

ADJUST

VOLUME

NEXT

MENU

INPUT 7

IRDISPLAY

COMPUTERS-VIDEOLRVIDEO AUDIOS-VIDEOLRVIDEO

RX LEARN

TX
RX

SYSTEM 7SC

Tip (Signal)

Sleeve (Gnd)

White = Signal

Black = Ground

Connecting an IR Broadcaster, IR Emitter, and a system switcher

Using a signal with a carrier signal

For most applications, a signal that already has a carrier frequency may
be used with the IR Broadcaster. Use pin C from the System 5/5cr/5cr
Plus or System 7SC connector, or pin A on the MLC (see diagrams on
page 7), and use the IR Broadcaster’s default DIP switch settings (switch
9 open) to allow the carrier signal to pass through and be broadcast.
This leaves the signal/no carrier pin available for a projector that uses a
wired remote control. The IR Emitter may not be used in this case.

Using a signal without a carrier signal

If you choose to have the IR Broadcaster generate the carrier signal, use
pin A from the System 5/5cr/5cr Plus or System 7SC connector, or pin C
on the MLC (see page 5). You may use an IR Emitter in this case.

If you use an IR Emitter, connect the white lined signal wire to the tip of
the 2.5 mm plug (provided), as shown in the diagram above. Connect
the solid black ground wire to the sleeve.

1. Open the IR Broadcaster’s case: remove and save the two small
screws from the underside of the enclosure, and lift the top of the
enclosure straight up.

2. Inside the Broadcaster, set DIP switch
#9 to the closed position (up). This
forces the Broadcaster to generate a
carrier signal.

3. Set the other DIP switches to deter­mine the carrier frequency. Page 3
features a table of all the possible
carrier signal output frequencies that
can be selected by setting the DIP
switches. Choose a frequency from
the table that is closest to that
required by the projector (or other IR­controlled device).

2

3

IR Emitter

6

7

41

Top View

ON

9

10

85

IR Broadcaster with Emitter Port • Installation & Operation

3