Stationary 3-Channel FM Transmitter
LT-803-072

Highlights

  • Economical price – backed by Listen’s exceptional service and support.
  • Three (3) channels – makes it simple to install, manage and use.
  • 100 % Digital – Listen transmitters are digitally-tuned so the transmission won’t drift.
  • Limited Lifetime Warranty.
  • Look & Listen™ LCD shows channel, channel lock, and signal strength.
  • Reliable clear sound quality - 62 dB Signal-to-noise ratio (SNR).
  • Balanced/Unbalanced Inputs – you can interface with any audio source on the market.
  • Designed for installation – rack mountable with optional remote antennas and rack mount kit make installation easy and service reliable.
  • Auto Processor – to condition the audio for voice/music prior to transmission.
  • VU level meter and test tone – simply makes the installation easier to set-up.
  • 30-day no obligation demonstrations available.
  • Many accessory options make Listen products ideal for a wide range of applications.

Overview

The LT-803-072 Stationary 3-Channel FM Transmitter can be used for assistive listening in a variety of venues. The transmitter offers universal inputs ensuring your ability to interface with any audio source i.e. mixer, microphone, IPod, or CD. The signature Look & Listen LCD shows channel, lock, and RF power. The LT-803-072 comes with a power supply (LA-207).

Includes

LT-803-072 Stationary 3-Channel FM Transmitter (72 MHz)
Power Supply
Quick Reference Card
Limited Lifetime Warranty Program Card

Configurations

LT-803-072-01 Stationary 3-Channel FM Transmitter (72 MHz) (North America)*
LT-803-072-02 Stationary 3-Channel FM Transmitter (72 MHz) (Asia, UK)*
LT-803-072-03 Stationary 3-Channel FM Transmitter (72 MHz) (Euro)*

Architectural Specs

The stationary FM transmitter shall be capable of broadcasting on one of any three channels – A (72.100 MHz), E (72.900 MHz) or H (75.900 MHz). The transmitter shall have a SNR of 62 dB or greater. The output power shall be adjustable to quarter, half or full. Channel tuning shall be capable of being locked. The device shall have an audio frequency response of 50 Hz to 15k Hz, ± 3 dB at 72 MHz. It shall have two (2) mixing audio inputs. The device shall have the following audio controls: input level, mix level and an adjustable low pass filter (contour). The device shall have an audio processor that is capable of automatic gain control and limiting. The Listen LT-803-072 is specified

CAD Drawing

    • Line Drawing

     
     

    Specifications

     SpecificationsLT-803-072
    RFRF Frequency Range(A) 72.100, (E) 72.900, (H) 75.900
    Number of Channels3 wide band
    Frequency Accuracy± .005% stability 32 to 122º (0 to 50ºC)
    Transmitter Stability50 PPM
    Transmission RangeUp to 1,500 ft. (457.20 m)
    Output Power 80,000 uV at 3 m  
    AntennaVarious antennas available
    Antenna ConnectorBNC
    ComplianceFCC Part 15, Part 90, Industry Canada
       
    Audio** All system specifications are wireless end to end**
    System Frequency Response50 Hz - 15 kHz (±3 dB)
    System Signal to Noise Ratio62 dB (A-Weighted)
    System Distortion<2% total harmonic distortion (THD) at 80% deviation
    Audio Input 1Rear panel, one (1) Female XLR and 1/4 in combo connector, balanced, 0 / -55 dBu (line/mic) nominal input level adjustable, -30 / +21 dBu (line/mic) maximum input level, impedance 20k / 1k ohm (line/mic), phantom power +12 VDC
    Audio Input 2Rear panel, two (2) phono connectors, unbalanced, -10 / +10 dBu nominal input level adjustable, +30 dBu maximum, impedance 100k ohm
    Audio Processing (Process)Compression can be turned on/off. Slope internally adjustable from 1:1 to 4:1. Default 2:1
    ContourCuts 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, +15 dBu maximum, impedance 10 ohm
    Headphone Output (Monitor)Front panel, one (1) 3.5 mm (0.14 in.) stereo connector, unbalanced, adjustable output level, +3 dBu maximum, impedance 10 ohm
     
    ControlsFront PanelPower, Test Tone on/off, Channel up/down, Input Levels, Mix Level, Contour, Monitor volume control
    Rear PanelInput 1 Level, (Line, Mic, Mic-Phantom Power), Input 2 level (-10 / +10 dBu), RF power level (low, mid, high)
    Internal AdjustmentsCompression ratio for audio processor
    ProgrammingProcess on/off, channel lock
       
    IndicatorsInput1, Input 2, Mix Level VUIndicates Input 1, Input 2, and Mix audio levels; 10 segment LED's (8 green, 2 red)
    ProcessingIndicated by a green LED when on (front panel)
    RF PowerIndicated on the LCD (low, mid, high)
    LCD DisplayChannel Designation, lock status, RF power level (front panel)
    Test ToneRed LED illuminates when test tone is enabled.
       
    PowerPower SupplyIn line power supply, Listen part number LA-207 (Line cord is determined by the each Country's AC power standards)
    Power Supply InputInput: 100-240 VAC, 50-60 Hz, 0.4 A
    Power Supply OutputOutput: 12 VDC, 1.3 A, 15.6 W
    Power Supply ConnectorOutput Connector: 0.02 in (5.0 mm) OD, 0.01 in. (2.5 mm) ID, barrel type
    Power Supply ComplianceUL, CE, GS, TÜV, RoHS
       
    PhysicalDimensions (H x W x D)1.75 x 8.50 x 9.13 in (4.5 x 21.5 x 23 cm)
    ColorDark Grey with white silk screening
    Unit Weight2.6 lbs. (1.2 kg)
    Unit Weight with LA-207-03 Power Supply4.5 lbs. (2.0 kg)
    Shipping Weight6.0 lbs. (2.7 kg)
    Rack MountingOne (1) rack space height, 1/2 rack space wide. One (1) or two (2) transmitters can be mounted in one rack space,optional rack mount (LA-326)
       
    EnvironmentalTemperature - Operation -10 ºC (14 ºF) to +40 ºC (104 ºF)
    Temperature - Storage -20 ºC (-4 ºF) to +50 ºC (122 ºF)
    Humidity0 to 95% relative humidity, non condensing
       
    Specifications are subject to change without notification

    Requirements

    Used With

    Accessories

    Support Documents

    • FAQ

    What is the range of the LT-803-072 transmitter?
    Line of site up to 1,500 ft. (457.20 m) with remote antenna.
     
    Does the LT-803-072 include the rack mount?
    No, but an LA-326 Universal Rack Mounting Kit is available for purchase. Antenna options for rack mounting also available.
     
    Do I need a transmitter for each audio source?
    Yes.
     
    Is there a limit to the number of LT-803-072 transmitters I can use in one room?
    Yes. The maximum is three.
     
    How many receivers can I have on a system?
    As many as you need, the number is endless.
    What is the warranty of Listen transmitters?
    Limited lifetime warranty. The following cases will void the warranty:
    • Misuse, dropping, or any other noticeable cosmetic damage.
    Is the LT-803-072 compatible with Listen’s other receivers (LR-300-072, LR-400-072, LR-500-072, LR-100-072, and LR-600-072)?
    Yes. Remember, the LT-803-072 has only three (3) channels (A, E, H) therefore the receiver will need to be tuned to one of those channels. Also, the SQ (Super Quiet) function must be turned off on the receiver.

    Troubleshooting Guide

     
     

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