ADA Calculator
Stationary IR Radiator
LA-140
Highlights
- Outstanding coverage - 10,000 ft² (929 m²)
- Two (2) radiators can be powered from a single LT-82 transmitter or optional power supply using standard CAT-5 cabling - eliminating the need for multiple cables
- White or grey color - allows for a variety of aesthetic settings
- Includes wall, ceiling, desk, mic stand and tripod mounting brackets - gives multiple options for mounting
- Units can be horizontally or vertically mounted together - doubles the power in a small footprint
- Radiator diodes are turned off if no audio signal is present at the transmitter after 30 minutes - saves radiator diode life
- Delay compensation - ensures no drop out in the IR signal
Overview
The LA-140 IR radiator/emitter packs high infrared power in a small and attractive design, with your choice of grey or white packaging. Designed for easy installation using standard components, the LA-140 is powered via CAT-5 cabling while the RF modulated carriers are delivered via standard coax cable. Mounting brackets are included for wall, ceiling, desk, mic stand and tripod mounting. Power can be supplied by the LT-82 transmitter or from a separate power supply (LA-205). Built-in delay compensation prevents signal cancellation (multi-path) problems and eliminates the piled-up cabling that is required with other systems. The LA-140 is used for government compliance (such as ADA), assistive listening, language interpretation, live theatre, houses of worship, courtrooms, secure rooms and for auditory description.Includes
Up to two LA-140 radiators can be powered by one LT-82. If additional power is required, order an additional LA-205 power supply.
Configurations
Architectural Specs
The radiator-emitter shall have a single carrier transmitting area of no less than 10,000 ft² (929 m²) or greater for each radiator specified when used with specified receiver. The radiator shall be powered via CAT-5 cabling and the RF from the transmitter shall be carried by 50 ohm coaxial cable. The radiator shall have three indicating LEDs for power, no carrier present and carrier present. The radiator LEDs shall be deactivated after 30 minutes if there is no audio signal present from the transmitter. The radiator shall come in a white or grey color and shall include all of the mounting hardware capable of mounting the radiator on a wall, on a ceiling, in a corner, on a desk, on a mic stand or on a tripod. The Listen LA-140 is specified.
CAD Drawing
Specifications
| Specifications | LA-140 | |
| RF | Frequency Range | 1 MHz - 5 MHz |
| Input | BNC Connection. -25 dBm to -5 dBm input nominal | |
| Output | BNC Connection. -15 dBu nominal | |
| Compliance | FCC Part 15, Industry Canada, CE, RoHS | |
| Coverage Area | 10,000 ft² (929 m²) when used with Listen Receivers | |
| Controls | User Controls | Termination Switch, Delay Compensation Switch, Indicator LEDs on/off, Compatibility Switch |
| Indicators | Red LED | Indicates power is present. |
| Yellow LED | Indicates no connection to transmitter or radiator. | |
| Green LED | Indicates carrier and power are present and radiator is emitting IR signal. | |
| Power | Input | RJ-45 connector. 30 VDC, powered from transmitter via CAT-5 cable or optional LA-205 power supply. |
| Output | RJ-45 connector. 30 VDC, powers up to one additional radiator. (Maximum two radiators powered from each LT-82 transmitter or LA-205 power supply) | |
| Number of Emitting Diodes | 84 | |
| Emitter Power | 3 W | |
| Physical | Dimensions (H x W x D) | 5.50 x 8.00 x 2.60 in. (140 x 203 x 66 mm) |
| Color | LA-140-GY (Grey), LA-140-WH (White) | |
| Unit Weight | 2.1 lbs. (0.95 kg) | |
| Unit Weight with Wall/ Ceiling Mounting hardware | 2.4 lbs. (1.09 kg) | |
| Shipping Weight | 4.0 lbs. (1.81 kg) | |
| 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 | |
| ** All system specifications are wireless end to end** | ||
Requirements
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LT-82 Stationary IR Transmitter
The 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).
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LA-205 30 VDC Extension/Replacement Power Supply for LA-140/LT-82 (North America)
The LA-205 is a replacement for the LT-82 power supply or can used to power an additional two (2) stationary IR radiators.
Used With
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LR-42 IR Stethoscope 4-Channel Receiver
This all-in-one receiver can receive up to four (4) channels in mono or stereo.
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LR-44 IR Lanyard 4-Channel Receiver
The IR Lanyard 4-Channel Receiver is comfortably worn around the neck and earphones are plugged into the receiver.
Accessories
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LA-391 RG-58 50 Ohm Preassembled Coaxial Cable (Per ft.)
Gives the right amount of cable for your FM/IR predesigned system.
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LA-337 IR Radiator Floor Stand
The radiator stand is a portable tri-pod stand for the stationary IR radiators.
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LA-127 RG-58 BNC Connector
BNC connector used for the LA-112 RG-58 Coaxial Cable (Crimp style).
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LA-115 BNC Coupler
Female to female BNC coupler is designed to connect two (2) coaxial cables together.
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LA-71 RJ-45 Cat-5 Connector (Pkg. of 10)
The RJ-45 connector is used to terminate CAT-5 cable for use with Listen Stationary IR systems.
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LA-393 Cat-5e Preassembled Cable (Per ft.)
Listen preassembles the RJ-45/CAT-5e cable for you, terminated at both ends and to your specified length.
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LA-342 Stationary IR Dual Radiator Mounting Bracket
The dual mount radiator bracket is designed to allow you to mount two radiators on one bracket.
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LA-205 30 VDC Extension/Replacement Power Supply for LA-140/LT-82 (North America)
The LA-205 is a replacement for the LT-82 power supply or can used to power an additional two (2) stationary IR radiators.
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LA-112 RG-58 50 Ohm Coaxial Cable (Per ft.)
RG-58 50 Ohm Coaxial Cable is used when more distance is needed for the antennas to have better coverage.
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LA-72 RJ-45 Cat-5e Coupler
The coupler is used to connect two CAT-5 cables together. NOT to be used with DIS Digital Conferencing equipment.
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LA-70 Cat-5e Cable (Per ft.)
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.
Support Documents