Lightspeed 820iR User manual

User Manual
820iR
Classroom Audio System

820iR User Manual
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820iR User Manual
CONGRATULATIONS!
Congratulations on your purchase of the 820iR Classroom Audio System!
This simple, yet powerful technology provides crystal-clear sound throughout the
classroom, allowing every child to hear every word every time.
As the teacher speaks into the REDMIKE® classroom microphone, his or her voice
is transmitted to the 820iR and then amplified through the loudspeaker(s). The
standard system includes the 820iR infrared receiver/amplifier, REDMIKE classroom
microphone, SR-70F infrared sensor and speaker package.
The 820iR is a two-channel receiver amplifier that allows the use of up to two
microphones simultaneously and up to two additional audio input sources such as
TV, VCR, DVD, CD, MP3, etc. In addition, Lightspeed
offers various speaker options that are included with your system to provide optimal
sound in rooms of all shapes and sizes.
The REDMIKE is an infrared classroom microphone. This pendant-style microphone
is clipped to a lavaliere cord and worn around the teacher’s neck. It can be used as
a standard handheld microphone for student interaction and class participation.

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820iR User Manual
1. Read Instructions—All safety and operation
instructions should be read before this
Lightspeed product is operated.
2. Retain Instructions—The safety and
operating instructions should be kept for
future reference.
3. Heed Warnings—All warnings on
this Lightspeed product and in these
instructions should be followed.
4. Follow Instructions—All operating and
other instructions should
be followed.
5. Water and Moisture—This
Lightspeed product should not be used
near water.
6. Heat—This Lightspeed product should be
situated away from heat sources such as
radiators, etc.
7. Power Sources—This Lightspeed
product should be connected to a power
supply only of the type described in the
operation instructions or as marked on this
Lightspeed product.
8. Power Cord Protection—Power supply
cords should be routed so that they are
not likely to be walked upon or pinched by
items placed upon or against them.
9. Object and Liquid Entry—Care should be
taken so that objects do not fall onto and
liquids are not spilled into the Lightspeed
product.
10. Damage Requiring Service—This
Lightspeed product should be serviced
only by qualified service personnel. The
user should not attempt to service this
Lightspeed product.
11. Prevent Electric Shock—Do not use this
polarized plug with an extension cord,
receptacle or other outlet unless the blades
can be fully inserted to prevent blade
exposure.
SAFETY INSTRUCTIONS AND CERTIFICATIONS
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
RISK OF ELECTRIC SHOCK DO NOT OPEN
The lightning ash with arrowhead symbol within
an equilateral triangle is intended to alert the user
to the presence of uninsulated “dangerous voltage”
within the product’s enclosure, that may be sufcient
magnitude to constitute a risk of electric shock.
The exclamation point within an equilateral triangle
is intended to alert the user to the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the
appliance.
CAUTION
CERTIFICATIONS
Lightspeed Technologies launched a formal product
recycle program in Europe that complies with the
European Union Directive 2002/96/EC on Waste
Electrical and Electronic Equipment (“WEEE
Directive”). Please visit our website at www.
lightspeed-tek.com for more information.
This product is manufactured using lead-free
processes and is free of other materials harmful to
the environment. It conforms to the most stringent
new European guidelines for consumer products
(RoHS).

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820iR User Manual
TABLE OF CONTENTS
820iR CLASSROOM AUDIO SYSTEM
Safety Instructions and Certifications ..................................................................................................ii
SECTION 1: System Overview ............................................................................................................1
System Components ........................................................................................................................2
Front Panel Controls ........................................................................................................................3
Rear Panel Controls ..........................................................................................................................4
REDMIKE Controls and Connections .............................................................................................5
Cradle Charger Controls and Connections....................................................................................6
SECTION 2: Installation ........................................................................................................................7
Unpacking Your System .........................................................................................................................................8
Location of the Receiver/Amplifier ...............................................................................................................9
IR Sensor Installation ...................................................................................................................... 10
Suspended Ceiling Mount ..............................................................................................................................11
Wall/Solid Ceiling Mount ................................................................................................................................11
Speaker Installation .........................................................................................................................................12
Audio Integration .............................................................................................................................................13
Finalizing Connections ...................................................................................................................................15
Final Check .........................................................................................................................................................16
SECTION 3: Initial Set-up, Charging and Optional Features .......................................................... 17
Initial Set-Up: REDMIKE ................................................................................................................. 18
Charging the REDMIKE ................................................................................................................. 19
Output to Personal FM Transmitter ..............................................................................................20
Using the REDMIKE to Amplify External Audio Equipment .......................................................21
SECTION 4: Optional Microphones and Accessories ......................................................................22
REDMIKE Volume Control Controls and Connections ................................................................ 23
Initial Set-Up: REDMIKE VC ........................................................................................................... 24
Charging the REDMIKE VC ........................................................................................................... 25
LT-71 Controls and Connections ................................................................................................... 26
Initial Set-Up: Optional LT-71 .........................................................................................................27
Charging the Optional LT-71 ......................................................................................................... 28
HM-70 Controls and Connections ................................................................................................ 29
Initial Set-Up: Optional HM-70 ...................................................................................................... 30
Charging the Optional HM-70 ...................................................................................................... 31
Audio Integration for the Optional iR Media Connector ............................................................ 32
Intial Set-Up: Optional iR Media Connector ................................................................................ 33
SECTION 5: Troubleshooting, Daily Use and Warranty .................................................................. 34
Troubleshooting Guide ..................................................................................................................35
Daily Use Instructions ..................................................................................................................... 36
Tips on Classroom Audio .............................................................................................................. 37
Warranty Statement ....................................................................................................................... 37
System Specifications ....................................................................................................................38
Individual Components and Optional Accessories ..................................................................... 39
User Notes ...................................................................................................................................... 40

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SECTION 1
System Overview

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POWER
A VOLUME B VOLUME TV/VCR CD/DVD ASSISTIVE LISTENING
IR IR AF AF
WIRELESS MICROPHONE VOLUME AUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
SYSTEM COMPONENTS
Keep ALL packaging materials. If the system must be returned, using the original packing
material will be quick, convenient and prevent damage.
820iR Infrared Receiver/Amplifier and Power Supply
REDMIKE Classroom
Microphone
SR-70F Infrared
Sensor
Sensor Cable
Optional LT-71 LightMic and
Charger Cable
Optional REDMIKE VC
Volume Control Microphone
Optional HM-70
Handheld Microphone
and Charger Cable
Speakers and
Speaker Wire
Charging Cradle and Power Supply
Helpful Hint
LT-71

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FRONT PANEL CONTROLS
1. POWER Switch/POWER Indicator:
This switch is used to turn the
820iR ON (switch up), or OFF
(switch down). When the POWER
switch is in the ON position, the
red POWER light will glow.
2. IR Indicators (IR): These lights will
glow red when the corresponding
microphone is turned on. This light
confirms the 820iR is receiving the
infrared signal.
3. AF Indicators (AF): These lights
flash green when audio (voice)
from the microphone is detected.
4. A VOLUME: Controls the volume
level of the teacher microphone
that is switched to Channel A.
Rotating the knob clockwise
increases output level.
5. B VOLUME: Controls the volume
level of the optional second
microphone that is switched to
Channel B. Rotating the knob
clockwise increases output level.
6. AUDIO INPUT VOLUME:
• TV/VCR: Controls the volume of
a TV/VCR connected to the
TV/VCR INPUT.
• CD/DVD: Controls the volume
of a CD/DVD player connected
to the CD/DVD INPUT.
7. ASSISTIVE LISTENING VOLUME:
Controls the volume level of an
assistive listening device.
POWER
A VOLUME B VOLUME TV/VCR CD/DVD ASSISTIVE LISTENING
IR IR AF AF
WIRELESS MICROPHONE VOLUME AUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
2
1
4
3
5
6
7

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REAR PANEL CONTROLS
SPEAKER OUTPUTS
250 400 700 1K 1K4 2K5 4K
6K3
+10
0
-10
AUDIO INPUT
CHARGERS
DC
POWER
TV/VCR CD/DVD
L L
R R
24V
DC
SENSOR INPUT
SENSOR
SHORT
2.06/2.54
1. SPEAKER OUTPUTS (1–4): These binding
post connectors are used to
connect the 820iR to the speakers.
Depending on speaker, all outputs
may not be used.
2. DC POWER: Plug the 24 V power supply
into this jack.
3. CHARGERS: These jacks can be used to
charge the optional LightMic or handheld
mic as an alternative to connecting them to
the REDMIKE cradle charger.
4. AUDIO INPUTS:
• TV/VCR: Accepts stereo signal
from TV/VCR via RCA cable.
• CD/DVD: Accepts stereo signal
from CD/DVD player via RCA cable.
5. 8-BAND GRAPHIC EQUALIZER: The
sliding controls adjust the levels of
the various audio frequencies. This
allows the installer to properly
equalize the system to produce optimum
sound quality.
6. SENSOR INPUT: The IR sensor cable
connects to the sensor input. Connect
additional sensors to the 820iR to cover
large or odd-shaped classrooms.
7. SENSOR SHORT: This LED glows when
there is a short in one of the
sensor cables.
1
32
45
6
7

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1. POWER BUTTON: Press this button to
turn the REDMIKE ON, press again to
turn it OFF (mute).
2. POWER/LOW BATTERY INDICATOR: A
BLUE light indicates the REDMIKE is on
and fully charged. A RED light indicates
a charge is needed.
3. BATTERY COMPARTMENT: To access
the battery compartment, slide the
door downward. The battery should
only be replaced by a Lightspeed
AA rechargeable sensing battery
(part # BA-NH2A27).
4. YELLOW PROTECTIVE TAB: Slide the
battery compartment door open to
remove this disposable protective tab
before use. NOTE: do not attempt to
remove the tab without first opening
the compartment door, as it may tear,
leaving fragments.
5. AUDIO/MICROPHONE INPUT: Use this input
to plug in a laptop, MP3 player or other audio
source to wirelessly transmit audio to be
played through the system. Alternatively, an
external microphone can be connected.
6. CHANNEL SELECT SWITCH (CH A/B): This
switch allows for selection between Channel
A or B. If you are using a single microphone,
we recommend using Channel A.
7. CHARGER CONTACTS (+ -): These contacts
interface with the charging tabs in the BC-
RMCC cradle charger for daily charging.
Simply place the REDMIKE in the charger.
REDMIKE CONTROLS AND CONNECTIONS
1
2
3
5
6
7
S
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o
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a
b
b
e
f
o
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e
4

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1. CHARGE INDICATORS: The light glows
RED while the REDMIKE is charging.
When fully charged, the light will glow
GREEN. A blinking RED light indicates
that no battery is sensed, (REDMIKE
Yellow Protective Tab may not have been
completely removed—see page 5, item
4.) A blinking Green LED means a non-
Lightspeed battery has been installed
(possibly an alkaline battery).
2. DC POWER PORT: Connect the DC power
cord here.
3. OPTIONAL CHARGING PORT: Plug the
charging cord for the optional LT-71 or the
HM-70 microphones here.
CRADLE CHARGER CONTROLS AND CONNECTIONS
1
2
3
International Note: Appropriate power cord and adaptor are
provided with all Lightspeed equipment.
Helpful Hint

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SECTION 2
Installation

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Ensure that you have received all of the components of your system.
1. UNPACKING YOUR SYSTEM
820iR Infrared Receiver/Amplifier and Power Supply
REDMIKE™Classroom Mi-
crophone
SR-70F Infrared Sensor and cable
NXQ (x 1)
WMQ (x 4)
DRQ (x 4)
Charging Cradle and Power Supply
POWER
A VOLUME B VOLUME TV/VCR CD/DVD ASSISTIVE LISTENING
IR IR AF AF
WIRELESS MICROPHONE VOLUME AUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
MCQ (x 1)
Speakers and Speaker Wire
Systems are configured with one of five
speaker types shown to the right.
CNXQ (x 1)

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2. LOCATION OF THE RECEIVER/AMPLIFIER
• Before running wires to the 820iR or
plugging in, find a suitable, stable
location for the amplifier. Ideally, the
teacher should have ready access and
an electrical outlet should be within
six feet. The best possible
location for the 820iR
is in a media cabinet
with any existing audio/
video equipment.
• A good location would be on any stable
bookcase or shelf within 6 feet of an
electrical outlet. The optional Lightspeed
wall shelf (part #AC-800WB) is specifically
designed to support the 820iR.
• Wires should be routed back directly to the amplifier, so
select a location that is free from obstructions that may
make routing wire difficult.
(Example: placing the 820iR near a
whiteboard or bulletin board would
require the wiring to be run an
extra distance in order to
reach the amplifier.)
Best
Good
Avoid!

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3. IR SENSOR INSTALLATION
Sensor location is very important for optimum performance of the 820iR Classroom Audio
System.
• BEST: On the ceiling at or near the middle of the classroom.
• GOOD: High and centered on the long wall.
• AVOID: Locations in corners, on walls at heights lower than 7 feet, or in places
where the line of sight is or could be obstructed.
Before adjusting the graphic equalizer refer to the intial set-up on page 22. Sometimes fine-tuning
is required to eliminate feedback.
Fine-tuning the Graphic Equalizer:
1. Slide up and flip down the EQ cover door.
2. Walk the room listening for feedback (squealing).
3. Lower the 2K5 and/or 4K sliders if a high-pitched ring is present.
4. Lower the 400 and/or 700 sliders if a low-pitched ring is present.
5. Reduce volume if feedback is still present.
Helpful Hint
Good placement Best placement
Avoid!

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1. Lift the ceiling tile nearest the grid rail in
your desired sensor location. Guide one
side of the C-clip over one edge of the
grid rail. Providing firm support to the
back of the grid rail with one hand (to
prevent bending), firmly and carefully
snap the second side of the C-clip over
the edge of the rail.
2. Uncoil sensor wire. Connect one
end of the sensor cable to the plug on
the sensor. Secure wire overhead and
route it back to
the system.
3. Connect the other end of the sensor
cable into one of the sensor inputs on
the back of the system.
IR SENSOR INSTALLATION (cont’d)
1. Screw the plastic mounting strip to a place
high on the wall or in the middle of the
solid ceiling. Mount the strip horizontally
as shown above.
2. Firmly snap the C-clip on the back of the
IR sensor onto the plastic mounting strip
with the sensor plug hanging down (if a
wall mount) or toward the receiver location
(if ceiling mount).
3. Uncoil the sensor wire. Screw one end
of the sensor cable to the plug on the
sensor. Route the wire back to the system,
securing it along
the way.
4. Connect the other end of the sensor cable
to one of the sensor inputs on the back of
the system.
Suspended Ceiling Mount Wall/Solid Ceiling Mount
sensor plug
c-clip
wall
mounting
strip

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4. SPEAKER INSTALLATION
1. Locate the speaker installation instructions packed
with your speaker(s).
2. Follow instructions and mount speaker(s).
3. Return to this manual to complete the set up of your
system.
CNXQ (x 1)
NXQ (x 1)
WMQ (x 4)
DRQ (x 4)
CNXQ (x 1)
MCQ (x 1)

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The 820iR is designed to integrate with multiple audio
sources allowing other instructional technologies to be
clearly heard throughout the classroom.
5. AUDIO INTEGRATION
Projector
DVD/VCR
Speaker(s)
IR Sensor
Teacher’s
Microphone
Projector
Audio In
Audio Out
IR Transmission
Video In
Audio Out
Audio Out
Video Out
Video Out
VGA Out
820iR
820iR BLOCK DIAGRAM

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POWER
A VOLUME
B VOLUME TV/VCR CD/DVD ASSISTIVE LISTENING
IR IR AF AF
WIRELESS MICROPHONE VOLUME AUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
Below are instructions on how to connect an external audio device like a TV/
VCR, CD/DVD or computer directly into the 820iR.
AUDIO INTEGRATION (cont’d)
3
1. Ensure the power switch is in the “OFF” position and all front panel volume controls
are turned fully counter-clockwise.
SPEAKER OUTPUTS
250 400 700 1K 1K4 2K5 4K 6K
+10
0
-10
OFF OFF OFF OFF
ON ON ON ON
VOL.
ADJ. ALD OUT AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R SENSOR INPUTS
SENSOR
SHORT
1 2 3 4
2
2. Connect a patch cable (not included) from
the audio source into the corresponding
input jack on the rear panel of the 820iR.
3. With both the 820iR and audio source power on, adjust the
corresponding volume control until the desired level is achieved.
NOTE! Be careful to not to set the volume too high, as this can distort
the speaker and potentially cause damage.
POWER
A VOLUME
B VOLUME TV/VCR CD/DVD ASSISTIVE LISTENING
IR IR AF AF
WIRELESS MICROPHONE VOLUME AUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
1

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2. Ensure speaker wire connections are secure and not frayed.
1. Ensure the power switch is in the “OFF” position and all front panel volume controls are turned
fully counter-clockwise.
6. FINALIZING CONNECTIONS
POWER
A VOLUME
B VOLUME TV/VCR CD/DVD ASSISTIVE LISTENING
IR IR AF AF
WIRELESS MICROPHONE VOLUME AUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
SPEAKER OUTPUTS
250 400 700 1K 1K4 2K5 4K
6K3
+10
0
-10
AUDIO INPUT
CHARGERS
DC
POWER
TV/VCR CD/DVD
L L
R R
24V
DC
SENSOR INPUT
SENSOR
SHORT
2.06/2.54
Use conduit to
protect wires.
• Conduit is the best
means to keep the
wires/cables out of
sight and safe from
wear. (Conduit is
not included.)
Helpful Hint
1
2