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Dear Valued Customer, Thank you for choosing Listen! All of us at Listen are dedicated to providing you with the highest quality products available. We take great pride in their outstanding performance because we care that you are completely satisfi ed. That’s why we independently certify them to the highest quality standards and back them with a limited lifetime guarantee. We stand ready to answer any questions you might have during installation or in the operation of our products. Should
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Table of Contents Package Contents Table of Contents Specifi cations Quick Reference Setup Instructions Operating Instructions Listen SQ™ RF Reception Channel Selection Channel Selection Compatibility Charts Compatibility Charts Information Design Guide Package Contents Specifi cations Quick Reference Setup Instructions Operating Instructions Listen SQ™ RF Reception Information LT-800 Table of Contents Package Contents 3 Specifi cations 4 Architectural Specifi cations 4 Sp
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Package Contents Package Contents Package Contents LT-800 Package Contents LT-800 Contents Listen Part Number • LT-800-072 (72 MHz) or LT-800-072 (72 MHz) • LT-800-216 (216 MHz) or LT-800-216 (216 MHz) • 12 VDC Power Supply • User Manual Optional Accessories See page 22 3
Inhaltszusammenfassung zur Seite Nr. 8
LT-800 Specifi cations Architectural Specifi cations 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 shal
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Package Contents Specifi cations Package Contents Specifi cations LT-800 Block Diagram POWER On Off Red 3.5MM LED Stereo In-Line CHANNEL SELECT Power Supply 115VAC6 LA-201 Up 0 Hz HEADPHONE (provided) 15VAC, 1A Power Supply Down CPU Module Volume Listen LCD Display Backlighted MIX Level Top Mounted Compression Ratio VU Meter Antenna Stud (internal adjustment) Remote Antenna Connection Transmitter RF Board Pre-emphasis Processing SQ Companding BNC ANTENNA Green Green LED LED MIX LEVEL On Off Low
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LT-800 Quick Reference LT-800 Front Panel: Controls & Displays Top mount antenna connection: Indicates Remove rubber plug and screw Process Mode antenna in place. is active. Indicates LCD: Shows Super Quiet which channel Adjust audio input levels Indicates audio input Monitor Port: Plug mode is active. is selected. of Input 1 and Input 2 level of Input 1 and in a headset and Shows here. See page 11 for Input 2. adjust volume. mixed audio more information. level. Mix Level: Adjust so
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Package Contents Setup Instructions Quick Reference Specifi cations Package Contents Setup Instructions LT-800 Setup Instructions 1 Unpack the Product Remove outer packaging and plastic cover. Inspect for physical damage. Mount in Rack (if necessary) 2 If rack mounting the unit, install the optional rack mount kit (part LA-326) according to the instructions included with the kit, then install the LT-800 in the rack. NOTE: If rack mounting, you will need to use a rear connection antenna. Rack Mou
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LT-800 Setup Instructions (cont.) To Select Phonak Mode: Press and hold down the channel select “up” button while powering on the unit. The LCD will display a “P” momentarily upon power up indicating that the transmitter is in the Phonak Channel Mode. The channels displayed will now match Phonak channels. To return to the Listen channel designations, repeat this process. The LCD will display an “L” momentarily upon power up indicating that you are in the Listen Channel Mode. 6 Select Chan
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Package Contents Setup Instructions Quick Reference Specifi cations Package Contents Setup Instructions LT-800 Setup Instructions (cont.) 8 Set RF Power Full Set the RF POWER switch on the back of the unit power to Full, 1/2 or 1/4 (Level is indicated on the LCD display). The amount of transmitted RF power that you will need depends on your application. If you 1/2 are operating multiple transmitters in the same power environment, it is best to set the transmitters Back of LT-800 unit outpu
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LT-800 Operating Instructions Power Unit On 1 Turn power on by pressing the power button. 2 Select a Channel Select the transmit channel by pressing the channel select UP and DOWN buttons. See Channel Selection on page 14 for more information. Channel Select UP and DOWN buttons NOTE: The LT-800 is shipped with only limited channels (Basic Mode). To select from all channels (Expanded Mode) refer to page 12. (for a more detailed description of Basic and Expanded Mode refer to page 12) 3 Lock o
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Operating Instructions Package Contents Setup Instructions Quick Reference Specifi cations Package Contents Operating Instructions LT-800 Audio Control Adjust Audio Input Level 1 Adjust the input knob counterclockwise to add gain to Input 1. This will decrease gain to Input 2. Adjust input knob clockwise to add gain to Input 2. This will decrease gain to Input 1. If you have two audio sources connected to both Input 1 and 2, adjust the level of one input using the VU meter, then adjust the out
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Listen SQ™ (Super Quiet) - Improving Your Listening Experience People are accustomed to listening to low noise, high fidelity audio SQ Summary (delivered via CD, DVD, etc.). FM radio systems, such as those made • SQ is NOT squelch by Listen, have more inherent noise compared to most sound systems. • SQ improves noise performance To minimize noise, Listen uses a noise reduction technology called by at least 20dB ListenSQ™. Both the transmitter and receiver must have the SQ feature enabled
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Package Contents Setup Instructions Quick Reference Speci RF Reception fi cations Package Contents RF Reception RF Reception Maximization Strategies For proper and dependable operation, Listen receivers need to receive a strong and consistent signal from the originating transmitter. Note that on portable receivers the headset wire is the receiving antenna. The following strategies should be used maximize this signal: 1 When designing and installing your system, keep in mind that the location o
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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 Wide Band Recommendation and error. Before turning on the transmitter, listen to the wide band Listen recommends that you always channels on the receivers (lettered channels at 72 MHz and channels use a wide band channel unless you that start with a “2” for 216 MHz when using a Listen receiver). Listen to need to be compatible with ex
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Compatibility Charts Package Contents Setup Instructions Quick Reference Specifi cations Package Contents Compatibility Charts 72 MHz Compatibility Chart Wideband frequencies are indicated in highlighted rows. The highlighted channels also indicated those channels available in the “basic” mode (default). All channels can be accessed when in the “expanded” channel mode (see page 8 for more information). *Parenthesis indicate T35 and T20 narrowband. 15
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216 MHz Compatibility Chart Frequency Phonic Light MHz Listen Ear Comtek Phonak Williams Gentner CSI AVR Speed 216.0125 1A 11 C01 N01 216.0250 2A 41 41 41 1 1 216.0375 3A 22 216.0625 1B 3 21 216.0750 2B 42 42 42 2 10 216.0875 3B 4 4 216.1125 1C 5 5 C05 216.1250 2C 43 43 43 A 3 6 216.1375 3C 6 22 216.1625 1D 7 23 216.1750 2D 44 44 44 B 4 14 216.1875 3D 8 8 216.2125 1E 9 9 C09 N09 216.2250 2E 45 45 45 C 5 2 216.2375 3E 10 24 216.2625 1F 11 25 216.2750 2F 46 46 46 D 6 11 216.2875 3F 12 12 C12 N12 2
