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 satisfied. 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.
Table of Contents Design Guide LT-800 Table of Contents Supplementary Information Troubleshooting Compliance Notice FCC Statement Warranty Contacting Listen Optional Accessories 18 18 20 20 21 21 22 Listen SQ™ 14 15 15 16 17 Operating Instructions Channel Selection Compatibility Charts 72 MHz Frequency Compatibility Chart 216 MHz Frequency Compatibility Chart Phonak Frequency Compatibility Chart Setup Instructions 6 7 10 11 12 13 13 Quick Reference Quick Reference Setup Instructions Operating Ins
LT-800 Package Contents • • • • LT-800-072 (72 MHz) or LT-800-216 (216 MHz) or 12 VDC Power Supply User Manual Package Package Contents Contents LT-800 Contents Listen Part Number LT-800-072 (72 MHz) LT-800-216 (216 MHz) Optional Accessories See page 22 3
LT-800 Specifications Architectural Specifications Specifi Package Contents Package Contents Specifications 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.
LT-800 Block Diagram POWER On Off Red LED Up HEADPHONE 15VAC, 1A Power Supply CPU Module Package Contents Specifi Package Contents Specifications cations 115VAC6 0 Hz 3.
LT-800 Quick Reference LT-800 Front Panel: Controls & Displays Top mount antenna connection: Remove rubber plug and screw antenna in place. LCD: Shows which channel is selected. Monitor Port: Plug in a headset and adjust volume. Package Contents Specifi cations Quick Reference Package Contents Quick Reference Adjust audio input levels of Input 1 and Input 2 here. See page 11 for more information. Indicates Process Mode is active. Indicates Super Quiet Indicates audio input mode is active.
LT-800 Setup Instructions 1 Unpack the Product 2 Mount in Rack (if necessary) Remove outer packaging and plastic cover. Inspect for physical damage. 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.
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.
LT-800 Setup Instructions (cont.) 8 Set RF Power Set the RF POWER switch on the back of the unit 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 are operating multiple transmitters in the same environment, it is best to set the transmitters output power to its lowest level to reduce the possibility of interference. 9 Full power 12 VDC 1.
LT-800 Operating Instructions 1 Power Unit On 2 Select a Channel Turn power on by pressing the power button. 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 Operating Instructions Package Contents Specifi cations Setup Instructions Quick Reference Package Contents Operating Instructions NOTE: The LT-800 is shipped with only limited channels (Basic Mode).
LT-800 Audio Control 1 Adjust Audio Input Level 2 Adjust Contour 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 output level of the other audio source. Adjust the input level until the left VU meter(s) occasionally illuminate the red LEDs.
Listen SQ™ (Super Quiet) - Improving Your Listening Experience People are accustomed to listening to low noise, high fidelity audio (delivered via CD, DVD, etc.). FM radio systems, such as those made by Listen, have more inherent noise compared to most sound systems. To minimize noise, Listen uses a noise reduction technology called ListenSQ™. Both the transmitter and receiver must have the SQ feature enabled to achieve the desired results.
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 of both the transmitting and receiving antennas is critical to maximize broadcast range.
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 (lettered channels at 72 MHz and channels that start with a “2” for 216 MHz when using a Listen receiver). Listen to the audio through the headphone or via the speaker and choose a channel with the least amount of interference.
72 MHz Compatibility Chart Package Contents Specifi cations Compatibility Charts Setup Instructions Quick Reference Package Contents Compatibility Charts 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.
216 MHz Compatibility Chart Compatibility Charts Package Contents Specifi cations Setup Instructions Quick Reference Package Contents Compatibility Charts Frequency Phonic MHz Listen Ear Comtek 216.0125 1A 1 2A 41 41 216.0250 3A 2 216.0375 216.0625 1B 3 216.0750 2B 42 42 3B 4 216.0875 1C 5 216.1125 216.1250 2C 43 43 216.1375 3C 6 216.1625 1D 7 2D 44 44 216.1750 216.1875 3D 8 216.2125 1E 9 216.2250 2E 45 45 3E 10 216.2375 1F 11 216.2625 216.2750 2F 46 46 216.2875 3F 12 1G 13 216.3125 2G 47 47 216.3250 216.
Phonak Frequency Chart Listen Phonak 216.012 1A 1 216.025 2A 41 216.037 3A 2 216.062 1B 21 216.075 2B 42 216.088 3B 4 216.113 1C 5 216.125 2C 43 216.137 3C 22 216.162 1D 23 216.175 2D 44 216.188 3D 8 216.213 1E 9 216.225 2E 45 216.238 3E 24 216.262 1F 25 216.275 2F 46 216.287 3F 12 216.312 1G 13 216.325 2G 47 216.338 3G 26 216.363 1H 27 216.375 2H 48 216.387 3H 16 216.412 1J 17 216.425 2J 49 216.438 3J 18 216.
LT-800 Troubleshooting Troubleshooting The LT-800 has no power Make sure the LA-207 power supply is connected to a power source and is connected to the jack marked “Power Input”. Make sure the POWER button is pressed in. There is no audio or the audio level is too low Make sure that your audio source is properly connected to Input 1 and/or Input 2. The Input 1 or Input 2 switches must be in the correct position for the appropriate input level.
LT-800 Troubleshooting (cont.) Troubleshooting I’m using another brand of receiver - how do I tell which channel to use Refer to Listen’s Frequency Compatibility Tables (pages 15-17). Adjust Listen’s transmitter to the same frequency as the other major brand. Since Listen products can access 57 channels, they will most likely receive on the same fixed channel or channels of other major brands. If you are using another brand of receiver, make sure you have turned off the SQ feature on the Listen product(s).
Compliance Notice & FCC Statement Compliance Notice This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) These devices may not cause harmful interference, and (2) these devices must accept any interference received, including interference that may cause undesirable operation. Listen’s LT-800 Transmitter (216 MHz only) Listen’s LT-800 transmitter is authorized by rule under the Low Power Radio Service (47 C.F.R.
Warranty & Contacting Listen Warranty Listen Technologies Corporation (Listen) warrants its transmitters and receivers (LT-82, LT-700, LT-800, LR-100, LR-42, LR-44, LR-300, LR-400, LR-500, LR-600) to be free from defects in workmanship and material under normal use and conditions for the useful lifetime of the product from date of purchase.
Optional Accessories Antenna Accessories LA-101 Helical Top Mounted Antenna (72 MHz) LA-102 Telescoping Top Mounted Antenna (216 MHz) LA-107 Ground Plane Remote Antenna (216 MHz) LA-122 Universal Antenna Kit LA-106 Telescoping Top Mounted Antenna (72 MHz) LA-123 90˚ Helical Antenna (72 MHz) The single solution for all of your indoor remote antenna needs. Includes: 72 and 216 MHz components; flexible and rigid dipoles and monopole radials; hardware for multiple mounting configurations; and 25 feet (7.
Optional Accessories (cont.) Cable & Connectors Accessories LA-112 RG-58 50 Ohm Coaxial Cable (per ft.) LA-128 RG-8 BNC Connector LA-127 RG-58 BNC Connector LA-113 RG-8 50 Ohm Low-Loss Coaxial Cable (per ft.) LA-390 RG-8 50 Ohm Preassembled Coaxial Cable (per ft.) LA-391 RG-58 50 Ohm Preassembled Coaxial Cable (per ft.
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Listen Technologies Corporation 14912 Heritagecrest Way Bluffdale, Utah 84065-4818, U.S.A. +1.801.233.8992 +1.800.330.0891 North America +1.801.233.8995 fax www.listentech.
