User's Manual
a brief word about infrared
Infrared is a light ray that is below the visible spectrum,
just like the sound spectrum extends beyond your hearing
ability. An example of infrared transmission is the
remote control for your TV set. When a button is pressed,
a beam of infrared light is emitted by a Light Emitting
Diode (LED) from the remote control. It is detected by a
receiving diode in your TV set. When you press a certain
command on your control, the internal electronics
cause the infrared light to icker in a programmed
sequential pattern (called modulating the light beam).
e modulated infrared beam is detected by the receiving
diode and is electronically decoded. e decoded signal
activates the circuitry to perform the command function
on your TV set.
So how does this apply to the infrared communication
system you are about to start using? e microphone/
transmitter has several Light Emitting Diodes (LED)
that emit infrared light beams to the sensor located
in the corner of the room. Now when you talk into the
microphone, the microphone element modulates the light
beam, causing it to icker in sync with your speech. e
sensor detects the sequential signal and the electronic
circuitry in the Forum 232 converts that sequential signal
into a line level analog audio signal. Now that audio signal
can be fed into an amplier. e amplier magnies the
electronic signal and sends it to the speakers. is causes
the speaker cone to move in sync with your voice. e
speaker replicates your voice and disperses your voice
evenly throughout the room.
1
IR transmission
e IR transmitter
transmits directly to the
sensor. However; due
to the strength of the IR
transmitter, the infrared
signal will bounce o the
walls, ceiling and oor for
reception thus providing
continuous connectiv-
ity throughout the room.
Benet: total freedom
of movement within the
room with no restriction
of orientation.
Infrared will not
penetrate a solid surface
thus preventing any
transmission from going
out of the room.
“What’s said in
the room, stays in
the room”.