Channel Selection

It is important to choose channels that are free from interference to achieve proper operation of your Listen equipment. This process is trial and error. Before turning on the transmitter, listen to the wide band channels. Listen to the audio through the headphone or on a Listen receiver or

receiver / speaker. Choose a channel with the least amount of interface. Unless you are interfacing with an existing narrowband transmission system, always use a wide band channel. If you are using multiple channels follow this process:

a. Same Space If you are using multiple transmitters in the same space, the maximum number of channels that will work simultaneously is six at 150 MHz. With all of the transmitters off, listen for interference on all the wide band channels via the headphone jack on a Listen receiver. Using the frequency chart on page 16, eliminate any channels that have noticeable interference. Now choose the channels with the widest channel spacing. It is recommended that adjacent channels be spaced at least 300 kHz.

b. Distributed spacing if you are using transmitters that are spread out over space, you can achieve more simultaneous broadcast channels. However, it is critical that your receiver(s) be located as close to its transmitter as possible. You can use adjacent channels (see frequency chart on page

16)in this case as long as the adjacent channel transmitter is at least 50% further away from the receiver as its transmitter.

It is highly recommended that after channel selection has been achieved, you lock the channel so that it cannot be changed by the user. To accomplish LOCK on the LT-700, press both the UP or DOWN buttons simultaneously for 5 seconds. Repeat the process to unlock.

Wide Band Recommendation

Listen recommends that you always use a wide band channel unless you need to be compatible with existing narrow band receivers from other manufacturers. Wide band channels have lower noise than their

narrow band counterparts.

At 150MHz

The LT-800 at 72MHz operates on 6 wide band channels and 27 narrow band channels.

• Numbers (0-6)= Wide Band Channels (Example: 4)

• Numbers (7-32)= Narrow Band

Channels (Example: 32)

LT-700-150 specifications

Listen Technologies LT-700-150 is a state-of-the-art assistive listening transmitter designed to enhance the listening experience in various settings, such as theaters, conference rooms, and classrooms. This device stands out for its robust features and advanced technologies, making it an ideal choice for venues that prioritize accessibility and high-quality audio transmission.

One of the primary features of the LT-700-150 is its exceptional audio clarity. The transmitter operates on a broad frequency range, ensuring that it delivers crisp and clear sound quality to listeners. With a frequency response of 20Hz to 20kHz, this device captures the full spectrum of audio, which is particularly beneficial in environments with diverse sound requirements.

The LT-700-150 incorporates advanced digital processing technology, which minimizes distortion and enhances audio fidelity. This is crucial in settings where clear communication is imperative, especially for individuals with hearing impairments. The unit is designed to transmit audio over a range of up to 500 feet, making it suitable for large venues without compromising on sound quality.

Another notable characteristic of the LT-700-150 is its versatility. The device allows for easy integration into existing audio systems, thanks to its multiple input options, including microphone and line-level inputs. This flexibility makes it an excellent choice for various applications, from live performances to guided tours.

The transmitter is also equipped with a built-in limiter to prevent sudden audio spikes, which can be jarring for listeners. This feature ensures a consistent listening experience, further enhancing user comfort. Additionally, the LT-700-150 includes an automatic frequency selection feature, which scans available channels to find the clearest transmission path, helping to avoid interference from other electronic devices.

User-friendly design is another aspect of the LT-700-150, featuring a straightforward interface with clearly labeled controls. This allows operators to adjust settings quickly and efficiently, optimizing the listening experience for all users.

In summary, the Listen Technologies LT-700-150 is a sophisticated transmission device that excels in delivering high-quality audio in a variety of settings. Its advanced features, excellent sound quality, and ease of use make it an indispensable tool for ensuring accessibility and enhancing communication. Whether in a theatrical performance or an educational environment, the LT-700-150 addresses the needs of listeners, providing clarity and convenience like no other.

Listen Technologies LT-700-150 manual Channel Selection, Wide Band Recommendation

Models: LT-700-150