TeachLogic VoiceLink III User manual

owner’s manual
Infrared Wireless Microphone System

owner’s manual
VoiceLink III

notes
Date of Purchase:
Model Number:
Serial Number:
Notes:

contact
thank you
If you should encounter
some unresolved issue,
please contact TeachLogic
customer service depart-
ment for further assistance.
4
owner’s manual
Congratulations on the purchase of your new
VoiceLink III Infrared Wireless Microphone Sound
System. You can be assured that the VoiceLink III
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 VoiceLink III
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.
Brian Van Waay
President
1•800•588•0018
[e-mail]
1•760•631•1283
www.teachlogic.com
VoiceLink III

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.
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.
certifications
Listed
US CA
TeachLogic systems are
manufactured using lead-
free processes and are free
of materials harmful to the
environment. They conform
to the most stringent new
European guidelines for
consumer products (RoHS).
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
caution

transmitter
table of contents
About Infrared .............................................................
Product Description ...................................................
VoiceLink III System ....................................................
Microphone/Transmitters ......................................
Drop-in Chargers / Ceiling Sensor .........................
Installation of System ................................................
Installation of Ceiling Sensor ...................................
Operation of VoiceLink III System ..........................
Wiring to Projector System .................................
Troubleshooting ..........................................................
Blank Page
General Specifications ..............................................
Microphone Specifications ...................................
Five Year Limited Warranty .....................................
1
2
3
4-5
6
7
8
9
10-11
12
13
14
15
16
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owner’s manual
VoiceLink III

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 this apply to the infrared
communication 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 VoiceLink III 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
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.
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”.

2
owner’s manual
2
VoiceLink III
product description
The VoiceLink III is an infrared wireless microphone
system that can be added to any sound system. It
can be a supplement to an existing multi-media
system to expand it's utilization to provide voice
reinforcement.
The addition of a VoiceLink III system to your
multi-media system will transform your classroom
sound system into a totally hands free voice
re-enforcement system, resulting in reduced voice
fatigue, enhanced student listening and improved
student learning. The wireless function permits
360° connectivity 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
receiver. The receiver transforms the composite
signal into an analog audio signal which is fed to
the multi-media amplifier. The amplifier powers the
speakers for even voice reinforcement throughout
the room.
The microphone / transmitter can be the Sapphire
or Handheld. 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.
Reliable
performance.
Use with
confidence.

3
front of IR-255 receiver/mixer
back of IR-255 receiver/mixer
Power / Mute Button
CH A Microphone Volume Control
CH B Microphone Volume Control
Auxiliary Volume Control)
Unbalanced Mic Level Output
(1/4" phone) this output is -15 Db
lower than the Phoenix connector
output and used primarily for
amplifiers with mic level inputs.
Auxiliary Input (3.5mm)
ALS/REC Volume Control
ALS/REC Output (3.5mm)
Balanced Line Level Output
(3-pin Phoenix Connector) Dual
Mono Inputs (RCA)
Two Sensor Inputs (RCA)
Power Input: 12VDC
1
2
3
4
5
6
7
2
3
4
5
1
7
6
5
4
3
2
1
4
321
VoiceLink III system
The VoiceLink III system is comprised of a
microphone / transmitter, either the Sapphire (IRT-
55), or Handheld (IRH-35) for voice transmission to
a ceiling sensor (ICS-55) that sends the signal to the
receiver / mixer (IR-255). The receiver processes the
signal and produces an analog signal of your voice
for input to an amplified sound system.
VoiceLink III
CH A CH B
COMP/AUX/DVD ALS/REC
INPUT OUTPUT
SENSOR
AVX/DVD
INPUTS
OUTPUTS
UNBALANCED BALANCED
5

2
owner’s manual
4
VoiceLink III
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.
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.
features
• Elegant design
• Only 1.4 oz. including bat-
tery
• Long life “Lithium ion”
battery
• 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” select-
able
• Three level microphone vol-
ume switch (low, medium,
high)
• Auxiliary input (3.5mm)
• Wear with a lanyard or slide
directly on neckline collar
(IRT-55) sapphire transmitter

5
IRH-35 handheld transmitter
The Handheld Microphone Transmitter (IRH-
35) is most applicable for student use or direct
presentation. It has an “on/off” switch and a
battery level indicator LED; Green=useable charge,
Red=low battery. The transmitter has 10 emitting
diodes: 8 around the bottom of the handle, and 2
toward the top of the handle. The metal housing
provides low handling noise and insures durable
longevity.
features
• Condenser microphone
element
• Power “on/off” switch
• Battery level indicator—
LED
• Channel “A” or “B” select-
able
• 10 high-power emitting
diodes
• Diodes at top and bottom
of handle for increased
Coverage (2 Top aimed
out, 6 Bottom 360°,
2 Bottom aimed down)
• 360º IR radiation for as-
sured connectivity
• Two “AA”, Duracell, re-
chargeable NiMH batteries

owner’s manual
6
VoiceLink III
BRC-55 drop-in battery charger
This stylish desktop drop-in charging station makes
it convenient and easy to recharge both Sapphire
Pendant and Handheld Microphones. Charge one
IRH-35 handheld transmitter and up to two IRT-55
Sapphire transmitters simultaneously. Charging
indicator lights illuminate Red when charging, and
Green when fully charged. The “TL” logo illuminates
Blue when plugged in.
ICS-55 ceiling sensor
sensor cable
The ceiling sensor is the preferred infrared sensor
for optimum performance. This is the unit that
needs to be installed on the ceiling. It comes with
a mounting/support bracket and 50 feet of plenum
rated cable with RCA connector on each end. The
ideal location for the dome sensor would be in the
center of the ceiling. This will provide a clear signal
path for the IR transmission from the transmitter to
the dome sensor without obstruction. In addition,
you will have 360° coverage and will minimize
the transmission distance for more reliable
performance. It collects the infrared transmission
signal via 6 large detecting diodes.
A Cable connects the sensor to the receiver. The
cable is dual-shielded with a male RCA connector
on each end and is plenum rated.
Green light indicates that
the sensor is receiving
power from the receiver.
power “on” LED

7
location and Installation of receiver
Since the VoiceLink III is a supplement to an existing
power amplifier system, you will want to locate the
receiver near the power amplifier to minimize audio
cable length from receiver to sound system.
Connect the output of the receiver to the line input
of the sound system.
• Balanced: Use three pin Phoenix connector, line
level.
• Unbalanced: Use a shielded cable with 1/4"
phone connector, this output is designed for mic
level input and is -15 Db less than the three pin
Phoenix connector output.
Pin 1 - Ground
Pin 3 - Negative
Pin 2 - Positive
Plug power supply into AC outlet.
Plug power cable into receiver.
installation of system
Location of receiver is primarily determined by user accessibility, location of sound system
and availability of an electrical outlet. Location of the sensor and routing of the sensor cable
is a more critical issue.
SENSOR
AVX/DVD
INPUTS
OUTPUTS
UNBALANCED BALANCED

owner’s manual
4
VoiceLink III
8
installation of ICS-55 ceiling sensor
The ideal location for the ceiling sensor is in the center of the ceiling. This will provide a
clear signal path for the IR transmission from the transmitter to the dome sensor without
obstruction. In addition, you will have 360º coverage and will minimize the transmission
distance for more reliable performance.
ICS-55
ICS-55

79
system operation
• Turn the VoiceLink III “ON”, Blue LED will light
• Confirm power to sensor, Green LED on edge of
sensor
• Set volume of Ch A volume control to mid scale
(12 o’clock)
• Using a Sapphire Transmitter microphone select
channel “A” (Mics are shipped in channel A)
• Sapphire: “A–B” switch, remove battery cover
on back, under battery.
• Handheld: Unscrew barrel and remove.
Note “A–B” switch on side of battery holder.
• Turn volume control on Sapphire transmitter to
mid level between "HI" and "LOW"
• Switch transmitter “on”
• Observe power LED (Blue) - use fully charged
battery only
• Observe signal presence LED (Orange) on
receiver adjacent to “Mic” volume control
• Stand under or in front of a speaker
• Slowly adjust “Ch A” volume on VoiceLink III
while talking into microphone
• Adjust to desired listening level.
CAUTION: Beware of feedback
• Walk around the room while talking into
microphone to confirm good connectivity
Upon completion of performance test,
the installation is complete.
operation of VoiceLink III system
Now that the system is installed and connected, we are ready to turn the system “ON” and test
its performance. The testing will be done using an IR transmitter (Sapphire or Handheld) to
confirm good connectivity and quality audio.

owner’s manual
10
VoiceLink III
projector system setup
• With the ceiling sensor installed, connect it to
the VoiceLink III sensor input
• Locate VoiceLink III near projector and connect
to AC power
• Connect an audio cable with 3.5mm connectors
from projector audio output to VoiceLink III
COMP/AUX/DVD Input (front panel)
• Connect VoiceLink III output to power amplifier:
• Shielded two-connector cable connected to
3 pin balanced output per page 7.
• Shielded audio cable with 1/4" phone from
unbalanced output to amplifier mic input.
• Turn "on" VoiceLink III, Power Amplifier, and
Video Projector
• Set “COMP/AUX/DVD IN” control on VoiceLink
III to 2 o’clock position
• Set Power Amp volume (if applicable) mid scale
• With microphone turned “on”, speak and adjust
microphone volume using “CH A” or "CH B"
volume control on VoiceLink III
• With an Auxiliary program turned “on” and
plugged into the projector, adjust the auxiliary
volume with the remote control
• Some adjusting of the VoiceLink III (COMP/
AUX/DVD) and amplifier volume may be required
• Once auxiliary volume is optimized, readjust
microphone volume using “CH A” or "CH B"
volume control
• System is now ready to use with remote control of
AUX inputs and consistent Mic volume
(Mic volume does not change with remote
volume control)
Microphone volume is
not affected by the remote
control of the auxiliary
inputs.
note
How to Interface VoiceLink III with a Video Projector
and incorporate the Projector’s Remote Control
Power Amp ( Not Supplied )
Infrared Transmitter
“Sapphire” IRT-55
Ceiling Sensor
Speakers
Speakers
VoiceLink III rear view
DVD Player
Projector
Remote Control
Video Projector
Computer MP3 Player
AUDIO OUT
REMOTE SENSOR
AUDIO
IN 1
AUDIO
IN 2
AUDIO
IN 3
INPUT
VoiceLink III
CH A CH B
COMP/AUX/DVD ALS/REC
INPUT OUTPUT
VoiceLink III
SENSOR
AVX/DVD
INPUTS
OUTPUTS
UNBALANCED BALANCED

11
Power Amp ( Not Supplied )
Infrared Transmitter
“Sapphire” IRT-55
Ceiling Sensor
Speakers
Speakers
VoiceLink III rear view
DVD Player
Projector
Remote Control
Video Projector
Computer MP3 Player
AUDIO OUT
REMOTE SENSOR
AUDIO
IN 1
AUDIO
IN 2
AUDIO
IN 3
INPUT
VoiceLink III
CH A CH B
COMP/AUX/DVD ALS/REC
INPUT OUTPUT
VoiceLink III
SENSOR
AVX/DVD
INPUTS
OUTPUTS
UNBALANCED BALANCED

transmitterowner’s manual
troubleshooting
System is turned
“on” but there is no
sound
System has power
but no sound
Voice is distorted
and/or signal drop-
out occurs
• Verify AC power; the Red
LED lights when turned
“on”
• Check if system has
been unplugged
• Check circuit breaker
• Call maintenance for
assistance
• Turn “on” microphone/
transmitter
• Check for IR transmission,
Signal presence (Orange
LED)
• Check the Yellow LED in
the sensor
• If sensor LED is not lit
• Sensor has been
disconnected
• Power output to sensor
has failed (Receiver/
amplifier needs to be
replaced)
• Check the charge on your
batteries
• Verify power switch in
battery compartment is in
“Hi” position (Body-Pack
transmitter)
• Verify that the diodes on
transmitter or sensor are
not being covered
• Obstruction between
transmitter and sensor
12
Problem Solution
VoiceLink III
contact
If your problem persists
and this guide has not
resolved the issue, call our
customer service depart-
ment for additional assis-
tance. [phone]

13
blank page

general transmitter specs.
Infrared FM
2.08 MHz & 2.54 MHz
Field Switchable
FM Wide-Band
32.768 KHz
± 25KHz
1600 Ft². 60 Ft.
On/Off
Green, (Useable Charge)
Red, (Needs Charging)
Approx. 7 Hr./Charge
Charger Connection
Transmission Carrier
Transmission Frequencies
Channel Switchable A or B
Modulation
Pilotone Frequency
Peak Deviation
Operating Range
Power Switch (Slide)
Battery Charge Level (LED)
Battery Life
External Battery Contact
14
transmitterowner’s manual
VoiceLink III
VoiceLink III (IR-255) specs.
power supply (AC-10) specs.
Infrared FM
FM Wide-band
Ch. A: 2.08 MHz, Ch. B: 2.54 MHz
850 nm
Ch. A: 32.768 KHz
50 µs
50 Hz, -13KHz, ± 3dB
›65 dB
‹1% @1KHz
± 10 KHz
± 25 KHz
Two, RCA
3.5mm with Gain Control, Front Panel
3.5mm with Gain Control, Front Panel
3 pin Phoenix, Real Panel
1/4" Unbalanced Mic Out, Rear Panel
12VDC / 0.6A / 7.2W
8 3/8" W x 1 3/4" H x 7" D
1 lb. 7oz.
ABS / Aluminum
Receiver Input
Modulation
Reception Frequencies
Infrared Wavelength
Tone Signal
De-emphasis
Frequency Response
S/N Ratio
THD
Nominal Deviation
Maximum Deviation
External Sensor Input
Computer/Aux Input
Line Output
Line level Balanced
Mic level Unbalanced
Power Supply
Dimensions
Weight
Enclosure
Regulated Switching Power Supply
100–240 volts AC, 47–63Hz
12.0 volts DC, 0.6A
7.2 watts Max.
Type
Input Voltage
Output Voltage
Power Output