Stationary IR Transmitter
- Secure wireless communication - ideal for applications where isolation of the signal is important
- Up to four (4) channels mono, or four (4) channels stereo – no need to sacrifice multiple channels to achieve stereo transmissions (one LT-82 is required for each channel)
- Transmitter can power two (2) radiator/emitters (LA-140) using CAT-5 cabling
- Easy to specify, install and use
- Outstanding performance - ensures crystal clear sound for listeners
- Limited Lifetime Warranty
OverviewThe Listen LT-82 is the heart of a stationary IR listening system. It takes the desired audio signal and transmits the signal via coaxial cable to one (1) or more IR radiator-emitters (LA-140). The LT-82 can be operated in mono or stereo on one (1) of four (4) different carriers; up to four (4) LT-82 units may be connected to provide up to four (4) mono or stereo carriers to the radiator(s). The LT-82 generates DC power to power up to two (2) LA-140 radiator-emitters. Two (2) LT-82 units can be rack mounted in a single rack space using the LA-326 rack mounting kit. The LT-82 is used for government compliance (such as ADA), assistive listening, language interpretation, live theatre, houses of worship, courtrooms, secure rooms and for auditory description.
The Stationary IR Transmitter shall be capable of broadcasting on four (4) mono or stereo carriers; 2.3, 2.8, 3.3 and 3.8 MHz. Channel Selection shall be capable of being locked. Multiple transmitters shall be capable of being daisy-chained together to transmit up to four (4) channels simultaneously. The transmitter shall have a timer that shuts off the carriers after 30 minutes when no audio is present at the transmitter. The transmitter shall have a SNR of 60 db or better. The device shall have an audio frequency response of 63 Hz to 15 kHz, +/- 3db. It shall have two (2) mixing audio inputs, one (1) balanced XLR/phone input and one (1) unbalanced RCA input. The device shall have the following audio controls: input level, transmit level, contour level and stereo on/off control. The device shall have an audio processor that is capable of automatic gain control and limiting. The transmitter shall provide power for up to two (2) radiators over CAT-5 cable. The LT-82 is specified.
|RF||Carrier Frequencies||2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz|
|Number of Channels||Four (4) channels. Selectable one (1) channel per transmitter (mono or stereo)|
|Carrier Shut Off||Carrier will shut off when no audio is present for 30 minutes to preserve radiator life.|
|Frequency Accuracy||+/- .005% stability 0 to 50 °C|
|Transmitter Stability||50 PPM|
|RF Output||Two (2) BNC connectors, for connection to radiator(s) and/or additional transmitter(s). 50 mV, 50 ohm, -15 dBm|
|RF Input||One (1) BNC connector, for connection from additional transmitter(s). 50 mV, 50 ohm, -15 dBm|
|Compliance||FCC Part 15, Industry Canada, CE, RoHS|
|Audio||** All system specifications are wireless end-to-end|
|System Frequency Response||63 Hz - 15 kHz (+/- 3 dB)|
|System Signal to Noise Ratio (A-weighted)||Mono: >60 dB|
|Stereo: >52 dB|
|System Distortion||<2% total harmonic distortion (THD)|
|Audio Input 1||Mono Input (Rear Panel). Female-XLR and 1/4 in. combo connector, balanced, 0/-55 dBu (line/mic) nominal input level adjustable; +21/-30 dBu (line/mic) maximum input level; impedance 20k/1k ohms (line/mic); phantom power +12 VDC|
|Audio Input 2||Stereo or Mono Input (Rear Panel). Two (2) Phono connectors, unbalanced, -10/+10 dBu nominal input level adjustable, +30 dBu maximum, impedance 100k ohms|
|Audio Processing||Compression can be turned on/off.|
|Contour||Cuts and boosts frequencies above 5 kHz|
|Combined Audio Output (Mix)||Input 1 and Input 2 Mixed Output (Rear panel). Two (2) Phono connectors, unbalanced, -10 dBu nominal output level, +19 dBu maximum, impedance 10 ohms|
|Monitor Output||Front panel. One (1) 3.5 mm (0.14 in.) connector, unbalanced, adjustable output level, +7 dBu maximum, impedance 10 ohms. 100 mW, 32 ohms|
|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 LED's (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)|
|Power||Power Supply||In-line switching mode power supply, Listen part number LA-205|
|Input: 100-240 VAC, 47-63 Hz|
|Output: 30 VDC, 1.5 A|
|Output Connector: RJ-45|
|Compliance: UL and CE Listed|
|Power Output:||Two (2) RJ-45 jacks. For remote powering up to two (2) radiators|
|Power Line Cord||North America, Type B, (LT-82-01)|
|Asia, UK, Type G, (LT-82-02)|
|Euro Type J, (LT-82-03)|
|Physical||Dimensions (H x W x D)||1.75 x 8.50 x 9.13 in. (4.5 x 21.5 x 23 cm)|
|Color||Dark Grey with White Silk Screening|
|Unit Weight||2.6 lbs. (1.18 kg)|
|Unit Weight with LA-205 Power Supply||3.8 lbs. (1.72 kg)|
|Shipping Weight||4.4 lbs. (2.00 kg)|
|Rack Mounting||One (1) rack space high (1U), 1/2 rack space wide. One (1) or two (2) transmitters can be mounted in a single rack space. Optional rack mount (LA-326) not included.|
|Environmental||Temperature - Operation||14 °F (-10 °C) to +104 °F (40 °C)|
|Temperature - Storage||-4 °F (-20 °C) to +122 °F (50 °C)|
|Humidity||0 to 95% relative humidity, non-condensing|
|Specifications are subject to change without notification|
The IR radiator/emitter packs high infrared power in a small and attractive design, with your choice of grey or white packaging.
The IR Lanyard 4-Channel Receiver is comfortably worn around the neck and earphones are plugged into the receiver.
This all-in-one receiver can receive up to four (4) channels in mono or stereo.
BNC connector for the LA-86 RG59 Coaxial Cable.
The RJ-45 connector is used to terminate CAT-5 cable for use with Listen Stationary IR systems.
Listen preassembles the RG-59 (75 ohm) coaxial cable for you, terminated at both ends and to your specified length.
BNC connector used for the LA-112 RG-58 Coaxial Cable (Crimp style).
Female to female BNC coupler is designed to connect two (2) coaxial cables together.
This kit is for mounting Listen's Stationary FM and IR Transmitters or the LR-100 Stationary Receiver/Amplifier.
The coupler is used to connect two CAT-5 cables together. NOT to be used with DIS Digital Conferencing equipment.
The cable is used to run power from the LT-82 Stationary IR Transmitter to the LA-140 IR Radiator and to extend the power supply to the transmitter and/or radiator.
Listen preassembles the RJ-45/CAT-5e cable for you, terminated at both ends and to your specified length.
RG-58 50 Ohm Coaxial Cable is used when more distance is needed for the antennas to have better coverage.
Gives the right amount of cable for your FM/IR predesigned system.