Listen Technologies LR-300, LR-400 manual LR-500 Specifications, Architectural Specifications

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LR-500 Specifications

Architectural Specifications

The FM reciever shall be capable of receiving on 57 wide and narrow band channels with a SNR of 80dB or greater. The receiver shall be programmable to electronically lock out unneeded channels. The receiver shall be capable of seeking channels. The device shall have an adjustable squelch. The device shall have an audio frequency response of 63 Hz to 15 KHz, ± 3dB at 72 MHz, or 63 Hz to 10 KHz, ±3dB at 216 MHz. The device will incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset. The device shall incorporate an LCD display that indicates channel, channel lock or lock status, battery level, battery charging, and RF signal strength. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen LR-500 is specified.

Specifications

 

Specification

 

LR-500-072

LR-500-216

 

RF Frequency Range

 

72.025-75.950 MHz

216.025-216.975 MHz

 

Number of Channels

 

57 (17 wide, 40 narrow)

57 (19 wide, 38 narrow)

 

Sensitivity

 

.6uV typical, 1 uV maximum for 12dB

SINAD

RF

Frequency Accuracy

 

± .005% stability 32 to 122º F (0 to 50º C)

Antenna

 

Uses earphone cable

 

 

 

 

 

Antenna Connector

 

3.5 mm connector

 

 

Squelch

 

Programmable in 20 steps

 

 

Compliance

 

FCC Part 15, Industry Canada

 

 

 

 

 

 

** All system specifications are wireless end-to-end

 

System Frequency Response

 

63 Hz-15 Hz (±3dB)

63 Hz-10 kHz (±3dB)

 

System Signal to Noise Ratio (A-weighted)

SQ™ enabled: 80dB;

SQ™ enabled: 80dB;

Audio

 

 

SQ™ disabled: 60dB

SQ™ disabled: 50dB

System Distortion

 

< 2% total harmonic distortion (THD) at 80% deviation

 

 

 

Output

 

3.5 mm connectors, unbalanced, 0dBu nomial output level, 16mW maximum,

 

 

impedance 32 Ohms

 

 

 

 

 

 

 

 

 

Set Up Controls

Programmable channel selection (see below), alkaline/NiMH batteries and squelch,

 

SQ™ enable/disable

 

 

 

 

 

User Controls

Volume, channel UP/DOWN/SEEK. All controls except volume are electronically

Controls

lockable

 

 

 

 

 

Unit can be programmed so that only desired channels are displayed. Squelch can be

 

Programming

adjusted for sensitivity and signal capture control. Channel selection can be locked by

 

 

holding the SEEK button for 5 seconds.

 

 

 

 

 

LCD Display

Indicates channel, RF signal strength, lock status, squelch, battery power level and

 

channel programming

 

Indicators

 

 

LED

Red, illuminates when unit is on. Flashes when batteries are low. Flashes when charg-

 

 

ing. Flashes when locked and user attempts to seek to another channel.

 

 

 

 

 

 

 

Battery Type

Two AA batteries, alkaline or NiMH

 

 

Battery Life (Listen batteries)

30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)

Power

Battery Charging (NiMH only)

Fully automatic, 14 hours

 

Power Supply Connector

2.3 mm OD by 0.7 mm ID, barrel type connector. 7.5VDC, center positive <250mA.

 

 

Drop in contact points for use with Listen charging cases

 

 

 

Compliance

UL Listed

 

 

 

 

 

 

Dimensions W x D x H

3.0 x 1.0 x 4.25 in. (7.6 x 2.5 x 13 cm)

 

 

Unit Weight

3.9 oz. (111 g)

 

Physical

Unit Weight with batteries

5.8 oz. (164.4 g)

 

Shipping Weight

1.0 lbs. (453.6 kg)

 

 

 

 

Door

Manually lockable. UP, DOWN and SEEK through door, other controls behind door

 

(see Controls above)

 

 

 

 

 

 

 

 

 

Temperature - Operation

14 to 104º F (10 to 40º C)

 

Environmental

Temperature - Storage

-4 to 122º F (-20 to 50º C)

 

 

Humidity

0 to 95% relative humidity, non-condensing

 

LR-500

7

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Contents Page Page Page Page Receivers Table of Contents Page Page Page LR-500 Table of Contents LR-500 Package Contents Architectural Specifications LR-500 SpecificationsLR-500 Quick Reference Battery CompartmentRemove the product LR-500 Setup InstructionsSelect Channels Make Sure the Unit is On LR-500 Operation InstructionsTo Lock into Only One Channel Locking Out Unwanted Channels LR-500 Programming InstructionsSquelch Programming Instructions LR-500 SquelchLR-500 Charging Batteries LR-500 Wall Transformer Operation Page Page Page Page LR-400 Table of Contents LR-400 Package Contents Specification LR-400-072 LR-400-216 LR-400 SpecificationsLR-400 Quick Reference LR-400 Setup Instructions See page 29 for squelch and programming information LR-400 Operation Instructions To Lock into Only One Channel LR-400 Squelch LR-400 Charging Batteries LR-400 Wall Transformer Operation Page Page Page LR-300 Table of Contents LR-300 Package Contents Specification LR-300-072 LR-300 SpecificationsLR-300 Quick Reference LR-300 Setup Instructions Red LED will illuminate when on Earphone/Headset jack LR-300 Operation Instructions LR-300 Charging Batteries LR-300 Wall Transformer Operation Channel Selection SQ Summary Listen SQRF Reception Maximization Strategies Comtek Williams Gentner Telex Drake MHz Compatibility ChartCSI AVR Troubleshooting Troubleshooting LR-300, LR-400, LR-500 ReceiversUsers keep changing channels TroubleshootingCompliance Notice Compliance Notice and FCC StatementWarranty Warranty & Contacting ListenEarphone Options Optional AccessoriesPage
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LR-500, LR-300, LR-400 specifications

Listen Technologies has established itself as a leader in providing innovative audio solutions that enhance communication in various environments. Among their standout products are the LR-400, LR-300, and LR-500, which are designed for assistive listening, language interpretation, and audio distribution. Each of these portable receivers offers unique features, ensuring that users have a seamless experience during presentations, events, and meetings.

The LR-400 is a versatile listening receiver that operates on a wide frequency range. It is specifically engineered for maximum clarity and disturbance-free reception. One of its primary features is the ability to connect directly to a variety of audio sources, making it compatible with numerous sound systems. This device boasts a prominent LCD display, which provides real-time information about channel selection and battery life, enhancing user accessibility. Additionally, the LR-400 supports both mono and stereo audio configurations, catering to different listening preferences and needs.

The LR-300, on the other hand, is specifically built for personal listening purposes, often utilized in classrooms, theaters, and guided tours. It is lightweight and compact, designed for ease of use and portability. One of the LR-300’s standout features is its long battery life, allowing for extended use without the need for frequent recharging. Users can easily adjust the volume for optimal sound levels, ensuring they can fully engage with the presented audio without compromising comfort. The LR-300 can also be equipped with various headphones and earphones, providing flexibility to suit individual preferences.

Finally, the LR-500 expands on the capabilities of its predecessors with advanced technology aimed at improving audiology experiences. It offers a digital communication protocol that significantly enhances audio quality while minimizing interference. The LR-500 is particularly suitable for professional settings, such as conferences and multinational events, where language interpretation is required. With multiple channel options, it allows participants to select their preferred language effortlessly. Its robust design ensures durability, making it suitable for frequent travel and usage in diverse environments.

In conclusion, the LR-400, LR-300, and LR-500 receivers from Listen Technologies exemplify the company's commitment to delivering high-quality audio solutions. Each device is equipped with advanced features and technologies that address specific user needs, whether for personal listening, language interpretation, or professional audio distribution. With their reliability and performance, these receivers enhance communication and accessibility in various settings, ensuring that every voice is heard loud and clear.