Listen Technologies LT-800-216, LT-800-072 LT-800 Specifications, Architectural Specifications

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Specifications

LT-800 Specifications

Architectural Specifications

The stationary FM transmitter shall be capable of broadcasting on 57 channels. The transmitter shall have a SNR of 80dB or greater. The output power shall be adjustable to quarter, half or full. Channel tuning shall be capable of being locked. The device shall broadcast on both wide and narrow band channels. The device shall have an audio frequency response of 63 Hz to

15k Hz, ± 3dB at 72 MHz, or of 63 Hz to 10k Hz, ± 3dB at 216 MHz. It shall have two mixing audio inputs. The device shall have the following audio controls: input level, mix level and an adjustable low pass filter. The device shall have an audio processor that is capable of automatic gain control and limiting. The Listen LT-800 is specified.

Specification

 

Specifications

LT-800-072

 

LT-800-216

 

RF Frequency Range

72.025 - 75.950 MHz

 

216.025 - 216.9875 MHz

 

Number of Channels

17 wide band, 40 narrow band

 

19 wide band, 38 narrow band

 

Frequency Accuracy

+/-.005% stability 32˚ to 122˚F (0˚- 50˚C)

RF

Transmitter Stability

 

 

50 PPM

Output Power

80,000uV at 3 m

 

100mW (max allowed by FCC)

 

 

 

Antenna

 

 

Various Antennas available

 

Antenna Connector

 

 

BNC

 

Compliance

FCC Part 15, Industry Canada

 

FCC Part 90, Industry Canada

 

 

** All system specifications

are wireless end-to-end

 

System Frequency Response

50 Hz - 15 kHz (±3 dB)

 

50 Hz - 10 kHz (±3 dB)

 

System Signal to Noise Ratio

80 dB SQ enabled; 60 dB SQ disabled

 

80 dB SQ enabled; 50 dB SQ disabled

 

(A-Weighted)

 

 

 

 

 

 

System Distortion

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

 

Audio Input 1

Rear panel. (1) Female-XLR and ¼ in. combo connector, balanced, 0/-55 dBu (line/mic) nominal input level adjustable,

 

-30/+21 dBu (line/mic) maximum input level, impedance 20k/1k Ohms (line/mic), phantom power +12 VDC.

 

 

Audio

Audio Input 2

Rear panel. Two (2) Phono connectors, unbalanced, -10/+10 dBu nominal input level

 

adjustable, +30 dBu maximum, impedance 100k Ohms.

 

 

 

Audio Processing (Process)

Compression can be turned on/off. Slope internally adjustable from 1:1 to 4:1. Default 2:1

 

Contour

Cuts 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,

 

+19 dBu maximum, impedance 10 ohm.

 

 

 

Headphone Output (Monitor)

Front panel. One (1) 3.5 mm stereo connector, unbalanced, adjustable output level, +7 maximum, impedance 10 Ohm.

 

 

 

 

Front Panel

Power, Test Tone on/off, Channel UP/DOWN, Input levels, Mix level, Contour, Monitor volume control.

Controls

Rear Panel

Input 1 Level (line, mic, mic-phantom power), Input 2 Level (-10/+10 dBu), RF Power (low, mid, high)

Internal Adjustments

Compression ratio for audio processor

 

 

Programming

SQ on/off, Processing on/off. Channel lock

 

 

 

 

Input 1 and Input 2, Mix VU

Indicates Input 1, Input 2 and Mix audio levels. 10 segment LED’s (8 green, 2 red)

 

SQ and Processing

Indicated by a green LED when on (front panel)

Indicators

RF Power

Indicated on the LCD (low, mid, high)

 

LCD Display

Channel designation, lock status, RF Power Level, programming (front panel)

 

Test Tone

Red LED illuminates when test tone enabled

 

 

 

 

Power Supply Type

In-line power supply. Listen part number LA-207 (Line cord is determined by each country’s AC power standards).

 

Power Supply Input

Input: 100-240 VAC, 50-60 Hz, 0.4 A

Power

Power Supply Output

 

Output: 12 VDC, 1.3 A, 15.6 W

 

Power Supply Connector

Output Connector: .02 in. (5.0 mm) OD, .01 in. (2.5 mm) ID, barrel type

 

Power Supply Compliance

 

 

UL, CE, GS, TUV

 

 

 

 

Dimensions (H x W x D)

1.75 x 8.50 x 9.13 in. (4.5 x 21.5 x 23 cm)

 

Color

 

Dark Grey with white silk screening

 

Unit Weight

 

 

2.6 lbs. (5.7 kg)

Physical

Unit Weight with LA-201

 

 

4.4 lbs. (2.0 kg)

Power Supply

 

 

 

 

 

 

 

 

Shipping Weight

 

 

5.0 lbs. (2.26 kg)

 

Rack Mounting

One (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)

 

 

 

 

 

 

 

 

Temperature - Operation

 

-10˚C (14˚F) to +40˚C (104˚F)

Environmental

Temperature - Storage

 

-20˚C (-4˚F) to +50˚C (122˚F)

 

Humidity

0 to 95% Relative Humidity, non condensing

Specifications are subject to change without notification

4

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Contents Page Page Page Page LT-800 Table of Contents Page LT-800 Package Contents LT-800 Specifications Architectural SpecificationsLT-800 Block Diagram HeadphoneLT-800 Quick Reference LT-800 Front Panel Controls & DisplaysLT-800 Setup Instructions To Select Phonak Mode Select Channel Mode if necessaryTo Select Expanded Mode Set SQ Super Quiet and Process FeaturesInput Set RF PowerConnect Audio Inputs Power Unit On LT-800 Operating InstructionsSelect a Channel Lock on ChannelAdjust Audio Input Level Adjust ContourAdjust Mix Level LT-800 Audio ControlListen SQ Super Quiet Improving Your Listening Experience RF Reception Maximization Strategies Coaxial CableIf you are using multiple channels follow this process Channel SelectionMHz Compatibility Chart CSI AVR Phonak Frequency Chart Frequency MHz Listen PhonakLT-800 Troubleshooting TroubleshootingThere is not sufficient range FCC Statement Compliance Notice & FCC StatementCompliance Notice Contacting Listen Warranty & Contacting ListenWarranty LT-800 Rack Mount Accessories Optional AccessoriesAntenna Accessories Cable & Connectors Accessories Microphone AccessoriesPage Page Page
Related manuals
Manual 31 pages 29.25 Kb

LT-800-072, LT-800-216 specifications

Listen Technologies has established itself as a leading provider of assistive listening systems, and its LT-800-072 and LT-800-216 transmitters are exemplars of their commitment to quality and innovation. These devices are designed to enhance the audio experience in environments where clear sound transmission is crucial, such as theaters, lecture halls, museums, and places of worship.

The LT-800-072 is a powerful, reliable FM transmitter that operates on the 72-76 MHz frequency band. It supports both mono and stereo transmission, making it versatile for various applications. One of its standout features is its robust selectable power output, which allows users to adjust the strength of the transmission based on the specific requirements of the environment, ensuring optimal coverage without interference. This flexibility is particularly beneficial in larger spaces, where sound needs to travel further without losing clarity.

On the other hand, the LT-800-216 is designed for use within the 216 MHz frequency range, offering another layer of versatility for varying listening preferences and regulatory requirements. It boasts a compact design, making it easy to integrate into existing audio systems or set up independently. The device also features a built-in audio input that accommodates multiple audio sources, including microphones, mixers, and other devices, allowing for seamless integration and functionality.

Both transmitters utilize advanced technology to deliver exceptional audio quality. The modulation techniques employed in these devices help eliminate static and background noise, ensuring that users receive crystal clear sound. The inclusion of multiple channels allows simultaneous transmission, which is a significant advantage in settings where multiple languages or presentation options are necessary.

Durability and ease of use are also critical characteristics of the LT-800-072 and LT-800-216. They are constructed with high-quality materials that withstand the rigors of regular use, making them ideal for both permanent installations and portable applications. Additionally, user-friendly controls and clear indicators simplify operation, enabling operators to focus on delivering an excellent auditory experience rather than troubleshooting technical issues.

In summary, the Listen Technologies LT-800-072 and LT-800-216 transmitters provide advanced sound transmission solutions characterized by flexibility, excellent sound quality, and robust build quality. Their capabilities make them suitable for various applications, effectively addressing the diverse needs of listeners in a range of environments.