User manual
Listen Technologies ListenIR iDSP Standard System

User Manual for Listen Technologies ListenIR iDSP Standard System

• Product category: Assistive Listening Systems Listen Technologies
• Brand: Listen Technologies
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for Listen Technologies Assistive Listening Systems

Product description

• ListenIR LT-82 1-Channel Transmitter This LT-82 1-Channel Transmitter from Listen Technologies takes the desired audio signal and transmits the signal via coaxial cable to one or more LA-140 IR radiator-emitters. The LT-82 can be operated in mono or stereo on one of four different carriers, and up to four LT-82 units may be connected to provide up to four mono or stereo carriers to the radiator(s). The LT-82 generates DC power to power up to two LA-140 radiator-emitters. Two LT-82 units can be rack-mounted in a single rack space using the LA-326 rack mounting kit. The LT-82 may be used for government compliance (such as ADA), assistive listening, language interpretation, live theater, houses of worship, courtrooms, secure rooms, and for auditory description.
  • Secure wireless communication, suitable for applications where isolation of the signal is important
  • Up to four mono or stereo channels; no need to sacrifice multiple channels to achieve stereo transmissions (one LT-82 is required for each channel)
  • Transmitter can power two radiators/emitters (LA-140), using Cat5 cabling
  • Easy to specify, install, and use
  • Performance ensures clear sound for listeners
  • True stereo audio (left and right) is transmitted on a single carrier frequency
  UPC: 819267023321
• LA-326 Universal Rack Mounting Kit The LA-326 Universal Rack Mounting Kit from Listen Technologies is compatible with the company's LT-800 Stationary Transmitter, LT-803 3-Channel Stationary Transmitter, LT-82 Stationary IR Transmitter, and LR-100 Stationary Receiver/Amplifier. It allows for both single and dual mounting, and includes hardware for a large variety of configurations. UPC: 819267021075
• LA-140 Stationary IR Radiator (White) The white LA-140 Stationary IR Radiator from Listen Technologies uses standard components, allowing for simple and easy installation. It is powered through CAT-5 cabling, and the RF modulated carriers are delivered through standard coaxial cabling. There are included mounting brackets for mounting the radiator to the wall or ceiling, or to a desk, mic stand, or tripod. Power can be supplied through the transmitter or through a separate power supply. Built-in delay compensation prevents signal cancellation and eliminates the need for additional cabling. The Stationary IR Radiator covers up to 10,000 ft², and features delay compensation, ensuring no drop out in the IR signal.
  • Covers up to 10,000 ft² / 929 m²
  • Two radiators can be powered from a single transmitter or optional power supply, eliminating the need for multiple cables
  • Mounting brackets included for multiple mounting options, including wall, ceiling, mic stand and tripod mounting hardware
  • Units can be horizontally or vertically mounted together, doubling the power in a small footprint
  • Radiator diodes are automatically turned off if no audio signal is present at the transmitter after 30 minutes, saving radiator diode life
  • Delay compensation ensures there is no drop out in the IR signal
  UPC: 819267020290
• Intelligent DSP IR Receiver The Intelligent DSP IR Receiver from Listen Technologies is an iDSP IR receiver with high-sensitivity. The integrated neck loop/lanyard with DSP loop driver, improves the listening experience for T-coil users. A field-replaceable, lithium-ion battery is included with the unit.
  
  The receiver has an OLED display which shows unique channel names, battery status, channel status, volume status, and charge activation. Connect the iDSP neck loop/lanyard or ear phones via two 3.5mm output jacks (receivers can be shared). The micro-USB connection is used with the free iDSP software suite for set up, programming, inventory management, firmware updates, and charging via any standard USB port.
  • High-sensitivity receiver
  • Integrated neck loop/lanyard with DSP loop driver improves the listening experience for T-coil users
  • OLED display which shows unique channel names, battery status, channel status, volume status, and charge activation
  • Can be worn around the neck, with the belt clip, or concealed in a pocket
  • Use for single channel applications
  UPC: 819267022287
• Intelligent Ear Phone Neck Loop Lanyard The Intelligent Ear Phone Neck Loop Lanyard from LISTEN Technologies is an integrated neck loop that incorporates a DSP loop driver for an improved listening experience for people who have hearing aids and cochlear implants with telecoils. It is capable of providing the proper field strength and a flat frequency response according to IEC60118-4 from the neck to the listening plane of the hearing aid. The AGC circuit optimizes speech with a dynamic range of 36 dB to enable a wide range of signal levels. The integrated 3.5 mm earphone jack on one side provides connection to LISTEN's universal earphones for use as a lanyard. The LA-430 easily slips over the head to be worn around the neck and features a quick-release for safety. The LA-430 enables venues to meet legislative requirements for assistive listening and deliver a listening experience in places where it's difficult to hear, such as theaters, lecture halls, concert venues, and houses of worship.
  • Integrated neck loop that incorporates an advanced DSP loop driver for an improved listening experience for people who have hearing aids and cochlear implants with telecoils
  • Capable of providing the proper field strength and a flat frequency response according to IEC60118-4
  • Integrated 3.5mm earphone jack provides connection to earphones for use as a lanyard
  • Makes it easy for venues to meet legislative requirements for assistive listening and deliver an exceptional listening experience
  • Compatible with Listen iDSP receivers
  UPC: 819267021532
• LA-401 Universal Ear Speaker (Dark Gray) The dark grey LA-401 Universal Ear Speaker from Listen Technologies is designed to provide maximum audio quality and freedom of movement without cable snags. The universal style easily fits over your ear and offers a comfortable, secure fit on either your left or right side. The open design allows you to hear direct sounds, as well as enabling you to use the speaker along with hearing aids. It is constructed of hard plastic which can be easily and hygienically cleaned and reused. The speaker can be used with the short integrated neck loop/lanyard for minimizing cable tangles, or with the included extension cord for concealing your wires in your pocket.
  • Provides optimal audio and the freedom of movement without cable snags
  • Universally styled to easily fit comfortably over the right or left ear
  • Open design allows the user to hear direct sounds and can be used with hearing aids
  • Use with integrated neck loop/lanyard or 3.5mm extension cable
  • Hard plastic can be easily and hygienically cleaned and reused
  UPC: 819267021426
• LA-304 Assistive Listening Notification Signage Kit The LA-304 Assistive Listening Notification Signage Kit from Listen Technologies provides venues with signage identifying the availability of assistive listening devices. It can be easily displayed in a window using the included static cling window sticker.
  • Informs people that assistive listening devices are available
  • Allows you to place a hard placard or static cling for the window
  UPC: 819267020825
• LA-381-01 Intelligent 12-Unit Charging Tray (Black) The black LA-381-01 Intelligent 12-Unit Charging Tray from Listen Technologies is compatible with all of the company's iDSP products, and is designed for streamlining the collection, care, charging, and dispensing of your iDSP units. The LA-381-01 features tension locking charging slots for proper charging contact and security. Each slot can also accommodate additional items, such as an ID card, while the receiver is being used. The charging tray can be mounted to a wall, drawer, rack, or table top for easily dispensing the iDSP devices.
  • Drop-in charging and dispensing station for streamlined dispensing, collecting, and care of up to 12 iDSP devices
  • Can be mounted on your wall, drawer, rack, and table top for easy and convenient dispensing
  • Tension locking ability to ensure proper charging contact and security
  • Includes Quick Reference Laminated Card
  UPC: 819267021310
• LA-382 Intelligent Cable Management Unit The LA-382 Intelligent Cable Management Unit from Listen Technologies is designed to be used with the company's LA-381 Intelligent 12-Unit Charging Tray for streamlined dispensing, collecting, and care of your iDSP headsets, ear speakers, and integrated lanyards. The base of the LA-382 can be connected to the charging tray or mounted to a flat table top for a fixed installation. The cable management arm can be connected facing inward over the charging units, or outward behind the charging units.
  • Use with charging tray for streamlined dispensing, collecting, and care of iDSP headsets, ear speakers, and integrated lanyards
  • Flexible mounting options helps keep cables organized and tangle free
• Disinfecting Wipes (20-Count Individual Packets) This individual packet contains twenty Disinfecting Wipes from LISTEN Technologies. They are lint free and highly absorbent. The water-based formula makes them safe to use on plastics, laminates, metals, Plexiglas screens and rubber surfaces. They are also bactericidal, tuberculocidal, virucidal and have been independently lab tested to disinfect quickly, and are EPA registered and approved in all fifty states.
  • Fast acting, safe and gentle solutions assure effective cleaning
  • Disinfecting solution won't damage surface and works in any environment
  • EPA registered and approved
  • Alcohol free
• Dispensing Log Book This Dispensing Log Book from LISTEN Technologies makes it easy for venues to have a streamlined process for dispensing, collecting and managing LISTEN Technologies' assistive-listening devices. You can record up to 582 entries in this conveniently-sized book.
  • Makes it easy for venues to have a streamlined process for dispensing, collecting and managing LISTEN assistive listening devices
  • Record up to 582 entries in a conveniently-sized book that's easy to store

• USB-to-Micro USB Cable (Replacement)

• 30 VDC Power Adapter for LA-140/LT-82

• Interconnection Coaxial Cable

• Limited 5-Year Warranty

• Left Side Bracket

• Right Side Long Bracket

• Right Side Short Bracket

• Dual Mount Center Bracket

• Quick Reference Card

• 10 x Machine Screws

• Limited 90-Day Warranty

• Mounting Hardware

• Coaxial Cable (25')

• CAT-5 Cable (25')

• Quick Reference Card

• Limited 3-Year Warranty

• Field-Replaceable Lithium-Ion Battery

• Limited Lifetime Warranty

• Limited 90-Day Warranty

• Earphone Extension Cable for Universal Earphones

• Limited 90-Day Warranty

• Hard Plaque

• Static Cling Window Sticker

• Limited 90-Day Warranty

• LA-209-01 5 VDC Intelligent 12-Unit Charging Tray Replacement Power Supply (Black)

• Quick Reference Laminated Card

• Limited 1-Year Warranty

• Base

• Arm

• Mounting Hardware

• Limited 90-Day Warranty

• Limited 90-Day Warranty

• Limited 90-Day Warranty

Also Includes

• Limited Lifetime Warranty

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Technical parameters

• ListenIR LT-82 1-Channel Transmitter

  Frequency Response	63 Hz to 15 kHz (+/- 3 dB)
  Signal to Noise Ratio (SNR)	Mono: >60 dB Stereo: >52 dB
  System Distortion	<2% total harmonic distortion (THD)
  Input	Input 1: 1x Female XLR or 1/4" combo connector, balanced, 0 / -55 dBu (line/mic) nominal input level adjustable, -30 / +21 dBu (line/mic) maximum input level, impedance 20 k / 1 kOhm (line/mic), phantom power 12 V DC - on rear panel Input 2: 2x phono connectors, unbalanced, -10 / +10 dBu nominal input level adjustable, +30 dBu maximum, impedance 100k ohm - on rear panel
  Output	Input 1, Input 2, mixed output on rear panel: 2x Phono connectors, unbalanced, -10 dBu nominal output level, +19 d Bu maximum, impedance 10 ohms
  Audio Processing	Compression can be turned on or off

  Controls	Front Panel: Power, Test Tone on/off, Channel up/down, Input Level, Transmit Level, Contour, Monitor Level Rear Panel: Input 1 Level (Line, Mic, Mic-Phantom Power), Input 2 Level (-10/+10 dBu) Internal Adjustments: Compression ratio for audio processor. Slope adjustable from 1:1 to 4:1. Default 2:1 Programming: Stereo on/off, Processing on/off
  Indicators	Unit Power: Red LED illuminates when the unit is powered up (front panel) Input 1, Input 2, Transmit Level: indicates Input 1, Input 2, and Transmit audio levels. 10 segment LEDs (8 green, 2 red) Stereo: Indicated by a green LED when on (front panel) Processing: Indicated by a green LED when on (front panel) RF Carrier: Indicates carrier is active on the LCD Display (front panel) LCD: Channel designation, lock status, RF Carrier, programming (front panel) Test Tone: Red LED illuminates when test tone enabled (front panel)

  Audio Carrier Frequencies	2.3 MHz 2.8 MHz 3.3 MHz 3.8 MHz
  Number of Channels	4 Channels, selectable one channel per transmitter (mono or stereo)
  Frequency Accuracy	+/- 0.005% stability 32 to 122ºF / 0 to 50ºC
  Transmitter	Transmitter stability: 50 PPM
  Outputs	2x BNC connectors for connection to radiator(s) and/or additional transmitter(s); 50 mV, 50 ohm, -15 dBm
  Inputs	1x BNC connector, for connection from additional transmitter(s); 50 mV, 50 ohm, -15 dBm

  Power Supply	In-line power supply, (part number LA-205)
  Power Supply Input	100 to 240 V AC, 47 to 63 Hz
  Power Supply Output	30 V DC, 1.5 A
  Power Supply Connector	1x RJ-45
  Power Output	2x RJ-45 jack, for remote-powering up to two radiators
  Power Cord	North America: Type B (LT-82-01) Asia, UK: Type G (LT-82-02) Europe: Type J (LT-82-03)

  Color	Dark gray
  Rack Mount	1U high, 1/2U space wide One or two transmitters can be mounted in a single rack space.
  Environmental	Operation Temperature: 14 to 104°F / -10 to 40°C Storage Temperature: -4 to 122°F / -20 to 50°C Relative Humidity: 0 to 95% relative humidity, non-condensing
  Compliance	FCC Part 15, Industry Canada, CE, RoHS, UL
  Dimensions	1.75 x 8.5 x 9.13" / 4.5 x 21.5 x 23.0 cm
  Weight	With Power Supply: 3.8 lb / 1.72 kg Unit Weight: 2.6 lb / 1.18 kg

  Box Dimensions (LxWxH)	14.3 x 10.9 x 3.1"

• LA-326 Universal Rack Mounting Kit

  Compatibility	Listen Technologies LT-800, LT-803, LT-82, LR-00
  Dimensions	19.0 x 1.8 x 8.0" / 48.3 x 4.4 x 20.3 cm
  Weight	4.4 lb / 2.0 kg

  Box Dimensions (LxWxH)	13.5 x 9.8 x 2.2"

• LA-140 Stationary IR Radiator (White)

  Buttons or Switches	Termination switch Delay compensation switch Compatibility switch
  LED Indicators	1 x Power (Red) 1 x Connection to transmitter/radiator (Yellow) 1 x Carrier and power are present, emitting IR signal (Green)
  Frequency Range	1 to 5 MHz
  Coverage Area	Up to 10,000 ft² / 929 m² when used with receiver
  Inputs	BNC connection (-25 dBm to -5 dBm input nominal) RJ-45 connector
  Outputs	BNC connection (-15 dBu nominal) RJ-45 connector
  Power Supply	Input: 30 VDC (powered from transmitter via CAT-5 cable) Output: 30 VDC (powers up to one additional radiator)
  Emitter	Power: 3 W
  Operating Temperature	-14 to 104°F / -26 to 40°C
  Storage Temperature	-4 to 122°F / -20 to 50°C
  Relative Humidity	0 to 95% RH, non condensing
  Approvals and Compliance	FCC Part 15, Industry Canada, CE RoHS
  Dimensions	5.5 x 8.0 x 2.6" / 14.0 x 20.3 x 6.6 cm
  Weight	2.1 lb / 1.0 kg Loaded: 2.4 lb / 1.1 kg

  Box Dimensions (LxWxH)	14.2 x 10.8 x 3.0"

• Intelligent DSP IR Receiver

  Frequency Response	63 Hz to 15 kHz (±3 dB)
  Signal to Noise Ratio	Mono: >60 dB Stereo: >52 dB
  Distortion	<2% total harmonic distortion (THD) at 80% deviation
  Audio Output Jacks	2 x 3.5 mm connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 Ohms, accepts mono or stereo phone plug

  User Controls	Power on/off and volume up/down
  Set-Up	Press and hold up/down volume buttons for 5 seconds to enter channel adjust, use up/down to select channel
  Programming	Via software and USB port

  LED	Flashes when batteries are low or to indicate charging, solid when fully charged
  Display	OLED; channel designation, battery level, unit number, charging status, volume status

  Carrier Frequency	2.3 MHz, 2.8 MHz, 3.3 MHz, and 3.8 MHz
  Number of Channels	4 x selectable channel
  Frequency Accuracy	± .005% stability 32 to 122°F (0 to 50°C)
  Modulation	FM Wideband, ±50 kHz deviation max, 50 uS de-emphasis

  Sensitivity	IR: better than 1 nW/cm2 @40 dB SNR
  Squelch	IR: programmable in 20 steps, automatic on loss of IR signal
  Power Save Mode	IR: turns unit off after a specified time of no IR signal, default is 30 minutes

  Battery Type	Lithium-ion
  Battery Life	8 hours of typical use
  Battery Charging Time	Fully charged in 2.5 hours
  Power Supply	Micro-USB connector, 5 V, 500 mA

  Operating Temperature	14 to 104°F (-10 to 40°C)
  Storage Temperature	-4 to 122°F (-20 to 50°C)
  Humidity (Non-condensing)	0 to 95% relative humidity

  Standards	FCC Part 15, ICS-03, CE, RoHS, WEEE

  Color	Flat black
  Dimensions	Unit: 3.75 x 2 x 0.64" (9.6 x 5 x 1.7 cm) Unit with Belt Clip: 3.75 x 2 x 0.80" (9.6 x 5 x 2.1 cm)
  Weight	Unit: 1.9 oz (53.9 g) Unit with Batteries: 2.8 oz (79.4 g)

  Box Dimensions (LxWxH)	4.3 x 2.4 x 1.1"

• Intelligent Ear Phone Neck Loop Lanyard

  Connectors	Connection to receiver: male 3.5 mm (TRS) to Male 3.5 mm (TRS) Connection to short ear phone: female 3.5 mm (TRS)
  Loop	Neck loop field strength: 400 mA/m (+/- 3dB) Neck loop frequency response: 100Hz to 5kHz (+/- 3 dB ref 1kHz)
  Compliance	RoHS, IEC60118-4
  Cable Length	29" (74 cm)
  Color	Black
  Weight	1.5 oz (43 g)

  Box Dimensions (LxWxH)	3.4 x 2.8 x 0.83"

• LA-401 Universal Ear Speaker (Dark Gray)

  Frequency Response	20 Hz to 20 kHz
  Impedance	32 ohms ±15% @ 1 kHz
  Power Input	Rated: 50 mW Maximum: 100 mW
  Input Sensitivity	115 dB ±4 dB @ 1 kHz, 1 mW
  Connections	1 x Male 3.5 mm (TRS)
  Approvals and Compliance	RoHS
  Cable Length	13.0" / 33.0 cm Extension cable: 28.0" / 71.1 cm
  Weight	0.4 oz / 11.3 g

  Box Dimensions (LxWxH)	4.0 x 2.5 x 0.5"

• LA-304 Assistive Listening Notification Signage Kit

  Dimensions	Hard plaque: 6.0 x 8.0" / 15.2 x 20.3 cm Soft cling: 6.0 x 7.9" / 15.2 x 19.9 cm
  Weight	6.0 oz / 170.1 g

  Box Dimensions (LxWxH)	8.3 x 6.4 x 0.2"

• LA-381-01 Intelligent 12-Unit Charging Tray (Black)

  Capacity	12 Units
  Power Supply Input	100 to 240 VAC, 50 to 60 Hz
  Power Supply Output	5.0 VDC, 8 A, 40 W
  Power Supply Connector	Barrel Type Inside diameter: 0.1" / 2.3 mm Outside diameter: 0.2" / 5.6 mm
  Approvals and Compliance	UL, CE, RoHS
  Dimensions	1.8 x 14.0 x 7.5" / 4.4 x 35.6 x 19.1 cm Input Power Cord: 72.0" / 182.9 cm Output Power Cord: 45.0" / 114.3 cm
  Weight	5.0 lb / 2.3 kg

  Box Dimensions (LxWxH)	18.0 x 12.4 x 3.0"

• LA-382 Intelligent Cable Management Unit

  Material	Steel
  Dimensions	Base: 12.4 x 7.5 x 8.1" / 31.4 x 19.1 x 20.6 cm Arm: 1.8 x 3.6 x 11.8" / 4.6 x 9.0 x 30.0 cm
  Weight	2.8 lb / 1.3 kg

  Box Dimensions (LxWxH)	12.9 x 8.5 x 0.2"

• Disinfecting Wipes (20-Count Individual Packets)

  Dimensions	Individual Sheet: 7 x 8" (17.8 x 20.3 cm) Package: 2 x 5.25 x 2.75" (5.1 x 13.3 x 7.0 cm)
  Weight	6.50 oz (184 g)

  Box Dimensions (LxWxH)	25.0 x 4.4 x 4.3"

• Dispensing Log Book

  Log Entries	582
  Dimensions	11 x 7 x 0.5" (27.9 x 17.8 x 1.3 cm)
  Weight	10.6 oz (0.30 kg)

  Box Dimensions (LxWxH)	10.9 x 7.1 x 0.5"

• USB-to-Micro USB Cable (Replacement)

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