Listen Technologies LT-800-150 manual Channel Selection

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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 on the receivers (channels 1-6). Listen to the audio through the headphone or via the speaker and choose a channel with the least amount of interference. 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:

1.Same Space: If you are using multiple transmitters in the same space, the most 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 15, 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 300kHz.

2.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 15) 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-800, press the “UP” button for 3 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.

150 MHz

The LT-800-150 MHz operates on 6 wide band channels and 26 narrow band channels.

•1 - 6 = Wide Band Channels

•7 - 32 = Narrow Band Channels

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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 & DisplaysUnpack the Product LT-800 Setup InstructionsConnect Power Mount in Rack if necessarySet SQ Super Quiet and Process Features To Disable or Enable SQ and Process FeaturesSet RF Power Connect Audio Inputs InputSelect a Channel Power Unit OnLT-800 Operating Instructions Lock on ChannelAdjust Contour Adjust Audio Input LevelAdjust 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 Frequency Chart LT-800 Troubleshooting TroubleshootingThere is not sufficient range Warranty & Contacting Listen WarrantyContacting Listen Optional Accessories Antenna AccessoriesLT-800 Rack Mount Accessories Cable & Connectors Accessories Microphone AccessoriesPage Page

LT-800-150 specifications

Listen Technologies LT-800-150 is a robust and versatile transmitter designed primarily for assistive listening applications. It is a pivotal component of the Listen Technologies assistive listening systems, allowing users to experience clear audio in various environments, such as theaters, churches, conference rooms, and other public venues.

The LT-800-150 operates in the 72-76 MHz frequency range, which is specifically allocated for assistive listening devices, providing reliable audio transmission without interference. This wide frequency range ensures compatibility with a myriad of receivers, enabling a seamless experience for users with hearing impairments. The device offers a power output of 150 mW, ensuring a strong and clear signal that can cover a large area, making it ideal for spacious venues.

One of the standout features of the LT-800-150 is its exceptional audio quality. The transmitter is equipped with a balanced XLR microphone input, allowing users to connect a variety of audio sources, such as microphones or sound systems. This flexibility ensures that whether it's a live performance or a pre-recorded presentation, the audio remains crystal clear for the audience.

The LT-800-150 also supports multiple channels, allowing several transmitters to operate simultaneously without cross-interference. This characteristic is particularly valuable in environments where multiple events or services occur concurrently, enabling each to cater to the specific audio needs of their attendees.

User-friendly design is another hallmark of the LT-800-150. The device features a simple interface with LED indicators that provide users with real-time feedback on power, audio activity, and other essential functions. Additionally, it comes with a built-in audio compression feature, which helps to optimize sound quality and maintain consistent audio levels.

Built for durability, the LT-800-150 is constructed with high-quality materials, making it suitable for frequent use in various settings. Its compact design means it can be easily integrated into existing audio setups without taking up significant space.

In summary, the Listen Technologies LT-800-150 is a reliable and effective solution for assistive listening. With its powerful output, excellent sound quality, and user-friendly features, it stands out as an essential tool for ensuring accessible audio experiences for all individuals, particularly those with hearing challenges. Whether in a public space or at a private event, the LT-800-150 delivers superior performance that enhances communication and inclusivity.
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