TeachLogic Forum 232 User Manual
owner’s manual
Infrared Wireless Microphone System
Forum 232
owner’s manual
thank you
Congratulations on the purchase of your new Forum
232 Infrared Wireless Microphone Sound System.
You can be assured that the Forum 232 fulfills all
specifications and was produced to very high
quality control standards. TeachLogic incorporates
the latest state of the art technology, employs the
most advanced manufacturing methodology and
uses only premium quality components to assure
many years of reliable performance. We appreciate
your confidence by your selection of our product. It
is TeachLogic’s intent to uphold that confidence by
providing factory assistance and dealer support.
We hope you will take the time to view this manual
to familiarize yourself with the product operation
and features. This manual will help you learn to use
and gain the maximum benefit of the Forum 232
system. The manual provides a basic explanation on
the principles and advantages of infrared
transmission. Followed by the system description,
operation and installation instructions, the manual
will conclude with maintenance and troubleshooting
procedures.
contact
If you should encounter
some unresolved issue,
please contact TeachLogic
customer service department for further assistance.
Brian Van Waay
President
1
•800•588• 0018
sales @teachlogic.com
1
•760•631•1283
www.teachlogic.com
2
safety instructions
Read Instructions
All safety and operation instructions should be read
before operating this TeachLogic product.
Retain Instructions
Safety and operating instructions should be kept
for future reference.
certifications
US CA
Listed
TeachLogic systems are
manufactured using leadfree processes and are free
of materials harmful to the
environment. They conform
to the most stringent new
European guidelines for
consumer products (RoHS).
caution
Recycle—Do not dispose
rechargeable batteries in
trash. Actually it is unlawful
to do so in CA, NY & ME.
Contact: Earth911.com
1-800-CLEANUP
Save our resources and
don’t contaminate.
Go Green
Water & Moisture
This product should not be operated near water.
Heat Environment
Do not subject this product to excessive heat
conditions.
Power Source
This product must be connected to an AC power
source per the voltage input specified and marked
on the power supply.
Power Cord Caution
Power cable should be routed clear of foot traffic
and supported clear of kinking or abrasion.
Object Protection
Locate the operating unit so it will not be subjected
to falling objects or water entry.
Internal Service
User should not attempt to service this product.
All internal service must be accomplished by a
qualified technician.
Electric Shock
Do not adapt or modify the AC power plug thus
lifting the earth ground connection.
Forum 232
owner’s manual
transmitter
table of contents
About Infrared ..........................................................
Product Description .................................................
Forum 232 System Description IMA-232 ...............
Sapphire Microphone/Transmitter IRT-60 ............
Handheld Microphone/Transmitter IRH-35 ..........
Drop-in Chargers BRC-55/Ceiling Sensor ICS-55
Installation of Ceiling Sensor ...................................
Instalation of Wall & Ceiling Speakers ..................
System Wiring ........................................................
RS-232 Features ......................................................
Security Alert Features ...........................................
Operation of Wireless Microphone .......................
1
2
3
4
5
6
7
8-9
10-11
12
13
14
Trouble Shooting .....................................................
General Specifications .........................................
Five Year Limited Warranty .......................................
notes
Date of Purchase:
Model Number:
Serial Number:
Notes:
15
16-17
18
4
IR transmission
The IR transmitter
transmits directly to the
sensor. However; due to
the strength of the IR
transmitter, the infrared
signal will bounce off the
walls, ceiling and floor for
reception thus providing
continuous connectivity
throughout the room.
Benefit: total freedom
of movement within the
room with no restriction
of orientation.
“What’s said in
the room, stays in
the room”.
Infrared will not
penetrate a solid surface
thus preventing any
transmission from
going out of the room.
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 flicker in a programmed sequential
pattern (called modulating the light beam). The
modulated infrared beam is detected by the
receiving diode and is electronically decoded. The
decoded signal activates the circuitry to perform
the command function on your TV set.
So how does t his apply to the inf rared commun ication
system you are about to start using? The
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
flicker in sync with your speech. The 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 amplifier. The amplifier magnifies
the electronic signal and sends it to the speakers.
This causes the speaker cone to move in sync with
your voice. The speaker replicates your voice and
disperses your voice evenly throughout the room.
1
Forum 232
owner’s manual
product description
The Forum 232 is an infrared wireless microphone
sound system. It is the nucleus of the classroom
sound field system which provides optimum voice
reinforcement.
The addition of a Forum 232 sound field system will
transform your classroom into a totally hands free,
voice re-enforcement system, resulting in reduced
voice fatigue, enhanced student listening and
improved student learning. The wireless function
permit s 360° connec tivity throughout the classroom
regardless of body position or orientation.
The system is comprised of an infrared detecting
sensor(s) installed in the ceiling. The sensor
collects the IR wireless signal from the microphone/
transmitter and sends a composite signal to
the mixer/amplifier. The receiver transforms the
composite signal into an analog audio signal
which is fed to the Forum 232 mixer. Two other
audio sources, such as; computer, DVD, VCR or
Projector can be plugged in to the Forum 232.
The volume level of each input will be controlled
by the individual volume control of each input. The
audio will then be fed to the speakers in the room
for even voice reinforcement throughout the room.
On the front panel of the Forum 232, there are two
3.5mm output jacks for interface with an assistive
listening system (ALS) and lesson capture (REC).
The microphone / transmitter can be one or two
Sapphires Pendant or a Handheld and a Sapphire
Pendant. The rechargeable batteries will provide
6 – 8 hours of service per charge. The drop-in
charger will recharge the batteries overnight, ready
for another day’s use.
2
Reliable
performance.
Use with
confidence.
2
Forum 232 system
Forum 232
CH A CH B
COMP/AUX
LESSON
CAPTURE
OUTPUT
INPUT
DVD
ASSISTIVE
LISTENING
OUTPUT
The Forum 232 system is comprised of a microphone / transmitter, either the
Sapphire (IRT-60), or Handheld (IRH-35) for voice transmission to a ceiling
sensor (ICS-55) that sends the signal to the receiver / amplifier (IMA-232).
The receiver/amplifier processes the signal and produces an analog signal of
your voice for output to the sound field speaker system.
2
1
3
front of IMA-232 receiver/amplifier
1
Power on/off
2
CH A Microphone Volume Control
3
CH B Microphone Volume Control
4
DVD Volume Control
5
Comp/Aux Volume Control
1
SPEAKER OUTPUT
4ohm load = 25watts/amp
R
_
+
_
+
6
7
8
9
10
2
3
1 Tx
2 Gnd
3 Rx
RS232
L
ON OFF
123
back of IMA-232 receiver/amplifier
1
Speaker Output - Two Channel
Four pin Phoenix connector
2
RS-232 on/off switch
3
RS-232 Tx, Gnd, Rx
Three pin Phoenix connector
4
Security Alert - Com,N/O,N/C
Three pin Phoenix connector
5
6
7
8
9
10
11
4
5
6
8
7
Comp/Aux Input (3.5mm)
ALS Volume Control
ALS Output (3.5mm)
REC Volume Control
REC Output (3.5mm)
9
4
1 COM
2 N/O
3 N/C
SECURITY
ALERT
123
5
6
EQUALIZER
HI
MID
LOW
COMP/ANTI-HUM
ON OFF
8
7
INPUTS
GAIN
COMP/AUX DVD
SENSOR
Three band digital equalizer
Computer Anti hum ON/OFF
Computer Input 3.5mm
DVD gain
±12 dB
DVD dual Mono Inputs (RCA)
Two Sensor Inputs (RCA)
Power Input: 19 VDC 3.4A
9
10
10
11
POWER
19V DC
3.4A MAX
±12 dB
3
Forum 232
owner’s manual
infrared microphone/transmitters
The infrared microphone/transmitter is comprised of a microphone input, signal processing
circuits and several emitting diodes that transmit the vocal signal to the sensor.
The microphone/transmitter can be the Sapphire or Handheld. The rechargeable batteries
will provide 6–8 hours of service per charge. Place the microphone/transmitter in the charger
for overnight charge and it will be ready for another day’s use.
The drop-in battery chargers are specifically designed to recharge lithium & NiMH batteries
at an optimum rate for maximum operating capacity and extended service life. Charger will
automatically start charging the batteries upon insertion and will shift to a maintenance
charge when batteries are fully charged.
features
•Elegant design
•Only 1.4 oz. including battery
•Long life “Lithium ion” bat-
tery
•Rechargeable via USB cable
to computer
•Battery level indicator – Back
light under power switch
•Momentary mute button,
backlight blinks in mute
mode
•Push “on/off ” power
•Channel “A” or “B” selectable
•Three level microphone
volume switch
•(HI, MID -3dB, LOW -6dB)
HI is normal
•Auxiliary input (3.5mm)
•Wear with a lanyard or slide
directly on neckline collar
(IRT-60) sapphire transmitter
The Sapphire’s vocal clarity is unsurpassed. Its
high level output is achieved by the unidirectional
(Cardioid) microphone and a unique free air
suspension system. With a built-in breath filter, the
Sapphire can function as a pass around hand mic.
The strategic alignment of the emitting diodes
assures reliable connectivity throughout the room
without static or drop out.
With a tap on the power button, the microphone
is muted for private conversation—tap again to
restore to normal operation. The auxiliary input
allows wireless playback of your iPod™ through the
Sapphire. A three position slide switch provides
selection of low, medium, or high microphone
sensitivity.
4
2
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