Stationary IR Radiator

Item:LA-140

Combining a compact, stylish design with outstanding coverage and simple setup, the LA-140 IR Radiator/Emitter from Listen Technologies is an expandable option for any infrared assistive listening application.

Two LA-140 units can be mounted together horizontally or vertically, doubling the power of your system without taking up an excessive amount of space. Additionally, two units can be powered by a single LT-82 transmitter or optional power supply with standard CAT-5 cable, making setup and installation simple.

Each unit includes hardware for mounting on wall, ceiling, desk, mic stand or tripod, making the LA-140 an incredibly versatile choice for nearly any IR assistive listening system.

With a compact design and availability in either white (-WH) or grey (-GY), the LA-140 IR Radiator/Emitter from Listen Technologies is a discreet and dependable choice.

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This product is available through authorized resellers.

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Includes

One (1) LA-140 Stationary IR Radiator
One (1) Mounting hardware (allows for wall, ceiling, desk, mic stand and tripod mounting)
Twenty-five (25) ft. (7.6 m) of coax cable, matched color
Twenty-five (25) ft. (7.6 m) of CAT-5 cable, matched color
One (1) Quick Reference Card

Up to two LA-140 radiators can be powered by one LT-82. If additional power is required, order an additional power supply.

Highlights

  • Up to 3,716 m² (40,000 ft.²) of maximum coverage per radiator
  • Two (2) radiators can be combined and powered by a single LT-82 transmitter or optional power supply via standard CAT-5 cabling
  • Can be mounted together horizontally or vertically for double the power in a compact space
  • Automatic radiator diode shutoff feature extends radiator life
  • Delay compensation to eliminate dropout in the infrared signal
  • Available in either white or grey for discrete installation in a variety of settings

Also Needed

Specs

+Controls

User ControlsTermination Switch, Delay Compensation Switch, Indicator LEDs on/off, Compatibility Switch

+Indicators

Red LEDIndicates power is present.
Yellow LEDIndicates no connection to transmitter or radiator.
Green LEDIndicates carrier and power are present and radiator is emitting IR signal.

+RF

Frequency Range1 MHz - 5 MHz
Input/sBNC Connection. -25 dBm to -5 dBm input nominal
Output/sBNC Connection. -15 dBu nominal
Coverage Area3,716 m² (40,000 ft.²) maximum coverage per radiator when used with LR-4200 / LR-5200 Receivers

+Power

Power Supply InputRJ-45 connector. 30 VDC, powered from transmitter via CAT-5 cable or optional LA-205 power supply.
Power Supply OutputRJ-45 connector. 30 VDC, powers up to one additional radiator. (Maximum two radiators powered from each LT-82 transmitter or LA-205 power supply)
Emitter Power3 W
Cable Length250 ft. with (1) LT-82 and (2) LA-140 or 700 ft. with (1) LT-82 and (1) LA-140.

+Physical

Width8.00 in. (203 mm)
Height5.50 in. (140 mm)
Depth2.60 in. (66 mm)
ColorLA-140-GY (Grey), LA-140-WH (White)
Shipping Weight6.0 lbs. (2.70 kg)
MountingRadiator can be mounted on a wall, on a ceiling, in a corner, on a desk, on a mic stand or on a tripod. Wall box mounting plate fits a standard single gang electrical box.
Weight2.1 lbs. (0.95 kg)
Weight (Loaded)2.4 lbs. (1.09 kg)

+Environmental

Temperature - Operation-14 °F (-10 °C) to +104 °F (40 °C)
Temperature - Storage-4 °F (-20 °C) to +122 °F (50 °C)
Relative Humidity0 to 95% relative humidity, non-condensing

+Compliance

StandardsFCC Part 15, Industry Canada, CE, RoHS

FAQs

+How much coverage is provided with the LA-140?

Approximately 10,000 ft² (929 m²).

+Does the number of audio sources (carriers) affect the coverage?

Yes, for two (2) sources (carriers), the total coverage is half of 10,000 ft² (929 m²). For four (4) sources (carriers), the coverage per carrier is one-fourth.

+How many radiators can you use on a system?

Up to 100.

+How many radiators will I need?

Refer to the technical resource section of the Listen website for assistance in making this calculation.

+Does the LA-140 come with a power supply?

No, you must use either the power supply included with the LT-82 transmitter or purchase the optional LA-205 power supply.

+How do I connect multiple radiators?

You can daisy-chain the radiators together using coax cables. Power for up to two radiators can be daisy-chained using a short length of CAT-5 cabling or you can power two radiators off one transmitter.

+Can I disable the LEDs on the radiator?

Yes, the LEDs can be turned off at a switch on the back of the radiator.

+How many emitting diodes does the LA-140 have?

The LA-140 radiator has 84 diodes. It has 7 columns of diodes with 12 diodes each. If one diode goes out, you will lose only the diodes on that column.

+What is the warranty of the LA-140?

The LA-140 has a 3-year warranty.

+How is power delivered to the radiator?

Power is delivered with CAT-5 cables (connected between the radiator and either the LT-82 transmitter or the LA-205 power supply).

+How many radiators can be powered from the LT-82 or LA-205 power supply?

Two.

+What is the purpose of the delay compensation switch?

This switch allows you to set up delay timing in a multi-radiator system so that each radiator receives the carrier at exactly the same time. This prevents signal dropouts that can be caused by out-of-phase signals (multi-path). With Listen’s delay compensation switch, it is not necessary to cut all of your coaxial cables to the same length - your shorter runs can use shorter cables, keeping your installation clean (and cost-effective).