General
Information |
Manufacturer
|
Listen Technologies |
Manufacturer Part
Number |
LS-91-01
|
Product Name
|
ListenIR iDSP Level II System,
North America
|
Overview |
The LS-91
ListenIR iDSP Level II System from Listen Technologies
comes complete with everything you need to begin
transmitting audio and meeting assistive listening
requirements
Ideal for small or medium-sized venues with a capacity of
up to 50 seats, the LS-91 offers a convenient way to add
secure assistive listening capabilities to boardrooms,
courtrooms, theaters, educational spaces, and more. Each
system includes one LT-84 Transmitter/Radiator combo,
along with several LR-4200-IR iDSP receivers and a 12-unit
charging tray. Packaged together, the LS-91 gives any
business or venue a convenient way to achieve compliance
with assistive listening regulations while giving your
clients the highest level of audio performance |
Features |
Furnish and install an
IR wireless assistive listening system for use by the
hearing-impaired
The assistive listening
system (ALS) shall be capable of broadcasting up to
two audio channels with the choice of four mono
carrier frequencies, 2.3, 2.8, 3.3 and 3.8 MHz
The system coverage area
shall be up to 30,000 ft2 (2787 m2) with single
channel transmission
The system shall have a
SNR of 60 dB or better and THD of less than 2 percent
The system shall have an
audio frequency response of 63 Hz to 15 kHz, +/- 3db
The system shall have
two independent mixing audio inputs, one for each
transmission channel
Each mixing input shall
consist of one 3.5 mm Microphone input, one balanced
Phoenix type input and one unbalanced RCA input
The system shall have
independent channel audio processing with Limiting,
Compression and Noise Gate as well as transmit level
control and level indication via an LED
The system shall provide
Power and RF signal for up to Four Expansion Radiators
over CAT-5 cable for additional coverage
The system receivers
shall be capable of receiving on four wide band
channels (carriers), Channel 1 (2.3 MHz), Channel 2
(2.8 MHz), Channel 3 (3.3 MHz) and Channel 4 (3.8 MHz)
The receivers shall be
tuned to a single channel and users shall not be able
to change the channel
The receivers shall have
the option of being lanyard or belt clip worn and the
lanyard shall incorporate an integrated neck loop for
compatibility with T-coil hearing aids
The receivers shall be
intelligent and provide customized audio to either
earphones or the integrated neck loop based upon which
is connected
The receivers shall have
two 3.5 mm (TRRS) connectors to drive the integrated
neck loop lanyard or up to two mono or stereo
earphones
The receivers shall
incorporate a multi-functional display (OLED) that
indicates battery status, inventory number, volume
level and a customizable channel name
The receivers shall
employ a unique iDSPTM noise reduction technology
The receivers shall be
fully programmable via PC software
The receivers shall have
a micro USB connector used for programming/setup,
inventory control, charging and firmware upgrades
The receivers shall
incorporate automatic battery charging circuitry and
use a non-proprietary lithium ion battery
The receivers shall
automatically turn on when removed from the charging
device and automatically turn off when returned to the
charging device
The receivers shall have
additional charging contacts to allow for multiple
charging options
|
Specification |
Includes
|
One LT-84-01 ListenIR
Transmitter/Radiator Combo
Two LR-4200-IR Intelligent DSP IR Receiver
Two LA-430 Intelligent Ear Phone/Neck Loop Lanyard
Two LA-401 Universal Ear Speaker
One LA-422 USB to Micro USB Cable
One LA-381-01 Intelligent 12-Unit Charging Tray
One LA-901 Listen Disinfecting Wipes (Cylinder 75 Count) |
ListenIR Transmitter/Radiator Combo
|
Audio
|
Frequency Response
|
20 Hz - 20 kHz (+/- 1 dB Line
Input
63 Hz - 15 kHz (+/- 3 dB)
System Specification (wireless end-to-end with LR-44)
|
Signal-to-Noise Ratio
|
More than 70 dB (SNR) Line Input
More than 60 dB (SNR)
System Specification (wireless end-to-end with LR-44)
|
Microphone Input
|
Two 3.5 mm Tip/Sleeve connector,
-30 dBu nominal input, +14 dB headroom, impedance 4.4
Ohms, 5 VDC bias supply
|
Total Harmonic Distortion
|
Less than 0.1 percent (THD) Line
Input
Less than 2 percent
System Specification (wireless end-to-end with LR-44)
|
Unbalanced Line Input
|
Sterreo/Mono Input
Two Dual (RCA) Phono connectors, Unbalances, -10 dBu
nominal input, +14 dB headroom, impedance 10 kOhms
|
Balanced Line Input
|
Mono Input. Two Phonix Type
connector, balanced, +4 dB unominal input, +14 dB
headroom, impedance 100 kOhms
|
Controls
|
Power Switch
|
Three position Switch
Power OFF
Power ON - Indicator Lights OFF
Power ON - Indicator Light ON
|
Carrier Frequency Selection
|
Two, four position rotary switches
(2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz)
|
Level Control Knob
|
Two audio taper rotary
potentiometer, counter-clockwise decreases input mix level,
clockwise increases input mix level
|
Indicators
|
Power Supply LED
|
Green LED on in-line power supply
indicates AC power is applied
|
Audio Level Indicators
|
Two Green LEDs, Two Red LEDs,
Green LED indicates Audio presence and Red LED indicates
peaks in the audio
|
RJ-45 Amber LED
|
Solid Amber indicates carrier is
present and IR is being transmitted
|
RJ-45 Green LED
|
Solid Green indicates power is
applied to unit, flashing indicates unit has entered power
save mode
|
RF
|
Carrier Frequencies
|
2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz,
Selectable
|
Number of Channels
|
Two channels, Selectable carrier
frequency
|
Frequency Accuracy
|
+/- 0.005 percent stability 0 to
50 degrees celsius
|
Transmitter Stability
|
50 PPM
|
Modulation
|
FM Wideband, +/- 50 kHz deviation
max, 50 uS pre-emphasis
|
Power Save Mode
|
Carrier will shut off when no
audio is present for 15 minutes on both channels to
presreve radiator life
|
Expansion Link Output
|
Two RJ-45 connectors - Provides RF
Signal and Power, CAT-5e cable 24 AWG, 100 ft maximum
cable length, two LA-141s per output connector
|
IR
|
Coverage Area
|
30000 ft2 single channel with
LR-4200-IR receivers
|
IR Emitter Power
|
1.49 W
|
Power
|
Power Supply Input
|
100 - 240 VAC
50 - 60 Hz
|
Power Supply Output
|
12 VDC
4 A
48 W
|
Power Supply Connector
|
2.5 mm ID barrel connector, center
positive
|
Power Output
|
Two RJ-45 connectors providing
Power and RF signal for uo to two LA-141 expansion radiators
on each output
|
Power Supply Type
|
In-Line switching mode power supply
|
Physical
|
Mounting
|
Can be mounted on a wall, ceiling,
or table with provided hardware (screws and hollow wall
anchors not provided) |
Environmental
|
Temperature - Operation
|
14 to +104 degrees fahrenheit
|
Temperature - Storage
|
-4 to +122 degrees fahrenheit
|
Relative Humidity
|
0 to 95 percent relative humidity,
non-condensing
|
Compliance
|
Standards
|
FCC part 15, ICS-03, CE, UL, CUL,
C-Tick, CCC, PSE, KC, GS, RoHS, WEEE |
Power Supply Compliance Marks
|
CUL, UL, CE, CCC, C-Tick, KC, PSE,
GS, FCC, RoHS |
Intelligent DSP IR Receiver
|
Audio
|
System Distortion
|
Less than total harmonic
distortion (THD) at 80 percent deviation
|
Audio Output Jacks
|
Two 3.5 mm connectors, unbalanced,
0 dBu nominal output level, mW maximum, impedance 32 ohms,
accepts mono or stereo phone plug or Intelligent Ear
Phone/Neck Loop Lanyard
|
System Frequency
|
63 Hz - 15 kHz (+/- 3 dB)
|
System Signal to Noise Ratio
|
More than 60 dB
|
Controls
|
User Controls
|
Power on/off and volume up/down
|
Programming
|
Via software and USB port, Auto
Seek, Jack Sense, Squelch, Auto Power, Auto Off, Stereo,
Brightness, Channel Name
|
Set-Up Controls
|
Press and hold up/down volume
buttons for 5 seconds to enterchannel adjust, use up/down
to select channel
|
Indicators
|
Display
|
OLED - Channel designation,
battery level, unit number, charging status, volume status
|
LED
|
Flashes when batteries are low or
to indicate charging, solid when fully charged
|
RF
|
Carrier Frequencies
|
2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
|
Number of Channels
|
Four selectable channels
|
Frequency Accuracy
|
+/- 0.005 percent stability 32 to
122 degrees fahrenheit
|
Modulation
|
FM Wideband, +/- 50 kHz deviation
max, 50 uS de-emphasis
|
IR
|
Coverage Area
|
30000 ft2 single channel
|
Squelch
|
Programmable in 20 steps,
automatic on loss of IR signal
|
Power Save Mode
|
Turns unit off after a specified
time of no IR signal, default is 30 minutes
|
Sensitivity
|
Better than one nW/cm2 at 40 dB
SNR
|
Power
|
Power Supply
|
Micro USB connector
5 V
500 mA
|
Battery Type
|
Lithium Ion
|
Battery Life
|
8 Hours of typical use
|
Battery Charging Time
|
Fully charged in 2.5 Hours
|
Physical
|
Color
|
Flat Black
|
Environmental
|
Temperature - Operation
|
14 to 104 degrees fahrenheit
|
Temperature - Storage
|
-4 to 122 degrees fahrenheit
|
Relative Humidity
|
0 to 95 percent relative humidity,
non-condemsing
|
Compliance
|
Standards
|
FCC Part 15, ICS-03, CE, RoHS,
WEEE, ADA 706, CBC 11B-706 |
Intelligent Ear Phone/Neck Loop Lanyard
|
Interconnections
|
Connection to Receiver
|
Male to Male 3.5 mm (TRRS)
|
Connection to Short Ear Phone
|
Female 3.5 mm (TRS)
|
Loop
|
Neck Loop Field Strength
|
400 mA/m (+/- 3 dB)
|
Neck Loop Frequency Response
|
100 Hz to 5 kHz (+/- 3 dB ref 1
kHz)
|
Physical
|
Color
|
Black |
Compliance
|
Standards
|
RoHS, IEC60118-4
|
Universal Ear Speaker
|
Audio
|
Frequency Response
|
20 Hz - 20 kHz
|
Impedance
|
32 Ohms +/- 15 percent at 1 kHz
|
Input Sensitivity
|
115 dB +/- 4 dB at 1 kHz, 1 mW
|
Rated Power Input
|
50 mW
|
Max Power Input
|
100 mW
|
Interconnections
|
Connector/s
|
Male 3.5 mm (TRS)
|
Physical
|
Color
|
Dark Gray
|
Cable Length
|
13", extension cable is 28"
|
Compliance
|
Standards
|
RoHS |
USB to Micro USB Cable
|
Interconections
|
Connector/s
|
USB (type A to Micro USB
(micro-B))
|
Physical
|
Color
|
Black |
Intelligent 12-Unit Charging Tray
|
Power
|
Power Supply Input
|
100 - 240 VAC
50 - 60 Hz
|
Power Supply Output
|
5.0 VDC
8 A
40 W
|
Power Supply Connector
|
0.22" OD x 0.09" ID, barrel type
|
Cord
|
72" Input Power Cord, 45"Output
Cord
|
Physical
|
Color
|
Black |
Compliance
|
Standards
|
UL, CE, RoHS
|
Listen Disinfecting Wipes (Cylinder 75 Count)
|
Physical
|
Sheet Size
|
7" x 8"
|
Weight and Dimensions
|
Weight
|
10 lbs
|