Stationary IR Transmitter

The heart of the Listen Technologies ListenIR system is the LT-82 single-channel transmitter. Capable of operating in either mono or stereo modes, the LT-82 transmits your audio signal to and provides DC power for one or more LA-140 infrared radiator/emitter units through a standard CAT-5 cable. Plus, units can be combined to offer up to four (4) channels of mono or stereo audio for expanded applications.

The LT-82 transmitter is an ideal infrared transmitter for a wide range of assistive listening needs, including theatres, houses of worship, language interpretation, and more.

• Frequency Response: 63 Hz - 15 kHz (+/- 3 dB)
• Signal-to-Noise Ratio: 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
• Audio Processing: Compression can be turned on/off.
• Contour: Cuts and boosts frequencies above 5 kHz
• 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
• Output/s: 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

• Programming: Stereo on/off, Processing on/off
• 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

• LCD: Channel designation, lock status, RF Carrier, programming (front panel)
• 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)
• Test Tone: Red LED illuminates when test tone enabled (front panel)

• Input/s: One (1) BNC connector, for connection from additional transmitter(s). 50 mV, 50 ohm, -15 dBm
• Output/s: Two (2) BNC connectors, for connection to radiator(s) and/or additional transmitter(s). 50 mV, 50 ohm, -15 dBm
• 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)
• Frequency Accuracy: +/- .005% stability 0 to 50 øC
• Carrier Shut Off: Carrier will shut off when no audio is present for 30 minutes to preserve radiator life.
• Transmitter Stability: 50 PPM

• Power Supply: In-line switching mode power supply, Listen part number LA-205
• Power Supply Input: 100-240 VAC, 47-63 Hz
• Power Supply Output: 30 VDC, 1.5 A
• Power Supply Connector: RJ-45
• Power Output: Two (2) RJ-45 jacks. For remote powering up to two (2) radiators

• Width: 8.50 in. (21.5 cm)
• Height: 1.75 in. (4.5 cm)
• Depth: 9.13 in. (23 cm)
• Colour: Dark Grey
• Unit Weight with Power Supply: 3.8 lbs. (1.72 kg)
• Shipping Weight: 6.0 lbs. (2.7 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.
• Weight: 2.6 lbs. (1.18 kg)
• Power Line Cord: North America, Type B, (LT-82-01)Asia, UK, Type G, (LT-82-02)Euro Type J, (LT-82-03)

• Temperature - Operation: 14 øF (-10 øC) to +104 øF (40 øC)
• Temperature - Storage: -4 øF (-20 øC) to +122 øF (50 øC)
• Relative Humidity: 0 to 95% relative humidity, non-condensing

• Standards: FCC Part 15, Industry Canada, CE, RoHS, UL