Listen Technologies LT-800-150 manuale d’uso

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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 satis fi ed. That’s why we independently certify them to the highest quality standards and back them with[...]

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1 Package Contents 3 150 MHz Speci fi cations 4 Block Diagram 5 Quick Reference 6 Setup Instructions 7 Operating Instructions 10 Audio Control 11 Listen SQ™ (Super Quiet) 12 RF Reception Maximization Strategies 13 Coaxial Cable 13 Channel Selection 14 150 MHz Frequency Chart 15 Troubleshooting 16 Warranty 18 Contacting Listen 18 Optional Accesso[...]

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3 LT-800 Package Contents Optional Accessories See pages 19-20 Listen Part Number LT-800-150 (150 MHz) LT-800 Contents • LT-800-150 (150 MHz) • 12 VDC Power Supply • User Manual • Quick Reference Card[...]

4 LT-800 Speci fi cations Architectural Speci fi cations The stationary FM transmitter shall be capable of broadcasting on 32 channels. The transmitter shall have an SNR of 80 dB or greater. The output power shall be adjustable to quarter, half or full. Channel tuning shall be capable of being locked. The device shall have an audio frequency resp[...]

5 In-Line Power Supply LA-201 (provided) 115VAC6 0 Hz Top Mounted Antenna Stud BNC Listen LCD Display Backlighted HEADPHONE 3.5MM Stereo 15VAC, 1A Transmitter RF Board Power Supply CPU Module SQ Companding Processing Pre-emphasis POWER On O PROCESS SQ ANTENNA Functions controlled by the CP Module Volume Up Down Remote Antenna Connection On O [...]

6 Adjust audio input levels of Input 1 and Input 2 here. See page 11 for more information. Indicates audio input level of Input 1 and Input 2. Shows mixed audio level. Indicates Process Mode is active. LCD: Shows which channel is selected. Monitor Port: Plug in a headset and adjust volume. Channel Select Down: Press for 8 seconds to enter program m[...]

7 LT-800 Setup Instructions Coax antenna connection. Rear of LT-800 shown. LA-132 Remote Antenna See RF Reception Maximization Strategies and Coaxial Cable on page 13. 1 2 3 Unpack the Product Remove outer packaging and plastic cover. Inspect for physical damage. Mount in Rack (if necessary) If rack mounting the unit, install the optional rack moun[...]

8 LT-800 Setup Instructions (cont.) Set SQ™ (Super Quiet) and Process Features Your transmitter is shipped to you with SQ (super quiet) enabled and Process disabled. For a detailed description of these features and when to use them, please refer to page 12. To Disable or Enable SQ and Process Features: With the unit on press and hold the channel [...]

9 - + XLR Wiring 1/4” Phone Wiring Back of LT-800 with XLR connected to Input 1 Line Mic Mic with Phantom Power LT-800 Setup Instructions (cont.) Connect Audio Inputs The LT-800 has two audio input options: Input 1 and Input 2. Input 1 is a balanced connection using either an XLR or 1/4” phono connector. Input 2 has two unbalanced mixing phono [...]

10 LT-800 Operating Instructions Press Test Tone button here Channel Select UP and DOWN buttons 1 Power Unit On Turn power on by pressing the power button. 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. 2 Lock on Channel Once you determine your [...]

11 Adjust Mix Level Adjust the mix level until the right VU meter occasionally illuminates the red LED. This is the level adjustment for the combined output from Input 1 and Input 2. 1 Adjust Audio Input Level 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 t[...]

12 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 ena[...]

13 The antenna for the LT-800 can be mounted directly on the unit if desired. However, you may find that the unit will provide better performance when the antenna is located elsewhere. If you plan to mount the antenna in a different location other than the top of the unit, you must use cable and connectors rated at 50 ohms. Although cable used for [...]

14 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 l[...]

15 150 MHz Frequency Chart Channel Frequency 01 150.900 02 152.400 03 151.500 04 152.100 05 151.200 06 151.800 07 150.850 08 150.950 09 151.000 10 151.050 11 151.100 12 151.150 13 151.250 14 151.300 15 151.350 16 151.400 17 151.450 18 151.550 19 151.600 20 151.650 21 151.700 22 151.750 23 151.850 24 151.900 25 151.950 26 152.000 27 152.050 28 152.1[...]

16 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 I[...]

17 LT-800 Troubleshooting (cont.) Troubleshooting There is not sufficient range First make sure that the receivers you are using are operating properly, then make sure that you have an antenna connected either to the top of the LT-800 transmitter or connected to the back of the unit (but not both!). The antenna should be as high as possible and fre[...]

18 Warranty & Contacting Listen Warranty Listen Technologies Corporation (Listen) warrants its transmitters and receivers (LT-82, LT-700, LT-800, LR-42, LR-44, LR-400, LR-500) 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. Listen warrants its Stat[...]

19 Optional Accessories Antenna Accessories LT-800 Rack Mount Accessories Includes components for single and dual rack configuration and a security cover NOTE: Rack mounted units cannot use the LA-134 top mounted antenna. LA-132 Universal Antenna Kit LA-134 Telescoping Top Mounted Antenna (150 MHz) LA-326 Universal Rack Mounting Kit LA-135 Antenna [...]

20 Optional Accessories (cont.) Cable & Connectors Accessories Microphone Accessories NOTE: To use Listen microphones you must use a converter (LA-280) to adapt the 3.5 mm connection to a 1/4” phono connection. LA-127 RG-58 BNC Connector LA-128 RG-8 BNC Connector LA-112 RG-58 50 Ohm Coaxial Cable (per ft.) LA-113 RG-8 50 Ohm Low-Loss Coaxial [...]

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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.com © 2009 Listen Technologies Corporation ® All Rights Reserved 09162009 Printed in China[...]