1. Manuals
  2. Brands
  3. Listen Technologies Manuals
  4. Radio
  5. 863 .050
  6. User manual

Listen Technologies 863 .050 User Manual

Stationary fm system 863 mhz
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 863 .050 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Listen Technologies 863 .050

Summary of Contents for Listen Technologies 863 .050

  • Page 3 Here’s how to reach us: 801.233.8992 800.330.0891 North America 801.233.8995 Fax support@listentech.com www.listentech.com Thank you and enjoy your listening experience! Best regards, Russell Gentner and the Listen Team Lifetime Warranty – the best in the business! Lifetime Warranty –...

  • Page 5: Table Of Contents

    Stationary FM Table of Contents Design Guide FM Technology Overview System Overview Key Concepts in Designing an FM System Notes LT-800 Stationary FM Transmitter Specifications Block Diagram Quick Reference Setup Instructions Operating Instructions Accessories Notes LR400/500 FM Receivers Specifications Block Diagram Quick Reference Setup Instructions Operating Instructions...

  • Page 9: Table Of Contents

    Stationary FM Design Guide Table of Contents Table of Contents Technology Overview System Overview Key Concepts in Designing an FM System Notes...

  • Page 11: Technology Overview

    Frequency Modulation (FM) Technology Overview Frequency modulation or FM is a means of transmitting audio using electromagnetic waves. This same technology is used by local FM radio stations to broadcast music. FM signals can travel through most barriers – walls, floors, and ceilings. The distance a signal travels has many different variables such as Radio Frequency (RF) output power, the type and placement of the antenna, and the broadcasted frequency.

  • Page 12: System Overview

    System Overview There are four main parts to a Stationary FM system – transmitter, antenna, receiver and input source, . LT-800 Stationary FM Transmitter (863 MHz) Input source LA-129 Articulating Antenna LR-400 Portable LR-500 Portable Display FM Reciver Programable Display FM (863 MHz) Reciver (863 MHz) Input Source...
  • Page 13 System Overview Antenna There are a several options for antennas. Antennas can either be back-mounted on the unit or remote mounted. LA-130 Remote Antenna Kit (863 MHz) LA-129 Articulating Antenna LA-131 Antenna Kit for Rack Mount (863 MHz) Receivers Listen offers two different portable receivers, the LR-400 and LR-500. LR-400 Portable LR-500 Portable Display FM Reciver...

  • Page 14: Key Concepts In Designing An Fm System

    Key Concepts in Designing a Stationary FM System Input Selection The LT-800 has two audio input options: Input 1 and Input 2. Input 1 is a balanced connection using either an XLR or ¼” phono connector. The LT-800 has two audio input options: Input 1 and Input 2. Input 1 is a balanced connection using either an XLR or ¼”...
  • Page 15 Key Concepts in Designing a Stationary FM System Input 2: Connect the audio source(s) Plug your unbalanced audio source into Input 2 and select the audio level switch for -10dBu or +10dBu, to match the audio level coming from your equipment. Using Two inputs The LT-800 can accomdate inputs simultaneously with the use of the input level potentiometer.
  • Page 16 Key Concepts in Designing a Stationary FM System Selecting Transmitting Frequencies Use this section of the guide to choose the channel settings for the transmitter and receivers. Find transmission channel(s) The goal is to find a transmission channel(s) that is free from interference. Interference comes from other transmitters and from other equipment (such as a computer).
  • Page 17 Key Concepts in Designing a Stationary FM System Antenna placement (rear or remote) Rear mounted antenna Rear mounting the LA-129 will allow the transmitter to be moved if necessary. Remote antenna The LA-130 Remote Antenna Kit connects to the LT-800 and can be placed away from the transmitter for better range.
  • Page 18 Key Concepts in Designing a Stationary FM System Front of the rack mounted antenna The antenna can also be in the front of the rack with the use of the LA-131 Antenna Kit for Rack Mount (863 MHz) and the LA-326 Universal Rack Mounting Kit. Maximizing Transmission Range For proper and dependable operation, Listen receivers need to receive a strong and consistent signal from the originating transmitter.
  • Page 19 Key Concepts in Designing a Stationary FM System Orientation Orient both transmitting and receiving antennas vertically. RF Power switch Position the RF Power switch on the back of the LT-800 to full RF Power, unless lower power is necessary. RF Power Switch Cable Length Keep coaxial cable from transmitter to antenna as short as possible.
  • Page 20 Key Concepts in Designing a Stationary FM System Mounting Transmitter The LT-800-863 can be rack mounted if necessary. With the use of the Listen LA-326 Universal rack mounting kit, you can mount one or two transmitters to the standard 19” rack. The rack mounted unit will take 1ru of space Rack Mount with dual units installed.
  • Page 21 Key Concepts in Designing a Stationary FM System Multiple Channels Guidelines for multiple channels in multiple and single spaces. Example #1 A museum patron walks to an exhibit and needs to listen to one channel at a time. In general, such systems work very well because of what is called “capture effect”. A Listen receiver will lock onto or “capture”...
  • Page 22 Key Concepts in Designing a Stationary FM System Example #2 Meeting participants need to select any one of, say, six language interpretations of the meeting. say, six language interpretations of the meeting. to listen to one channel at a time. In general, the first 12 channels with Listen’s L maximum number of channels is listed below.

  • Page 23: Notes

    Notes...
  • Page 24 Notes...
  • Page 29 LT-800 User’s Manual Table of Contents Specifications Block Diagram Quick Reference Setup Instructions Operating Instructions Accessories Notes LT-800-863 Package Contents • LT-800-863 • Quick Reference sticker • Antenna w/ BNC Connector • LA-207-03 12v DC power supply LA-129 Articulating Antenna LT-800-863 Stationary FM Transmitter LA-207 Power Supply Listen Configurations...

  • Page 31: Specifications

    LT-800 Specifications Architectural Specification The Stationary FM Transmitter shall be capable of broadcasting on 17 channels. Channel tuning shall be capable of being locked. The transmitter shall have a SNR of 70 db or greater. The output power shall be adjustable to quarter, half or full. The device shall have an audio frequency response of 50 Hz to 15 kHz, +/-3db.

  • Page 32: Block Diagram

    LT-800 Block Diagram POWER 115/230VAC Universial Power 50/60 Hz Supply (provided) 12VDC, 1.3A Power Supply CPU Module Down MONITOR Volume Listen LCD Display Backlit Compression Ratio (internal ajustment) MIX Level VU Meter ANTENNA Transmitter Pre-emphasis Companding Processing RF Board MIX LEVEL Green LED High Functions controlled by...

  • Page 33: Quick Reference

    LT-800 Quick Reference Mix audio level: Shows mixed level Input level indicators: Shows input 1 Process LED: Indicates audio processing mode is active and input 2 levels. Input 1 and 2: Adjust audio input levels of LCD Display: input 1 and See LCD display input 2 here quick reference...

  • Page 34: Setup Instructions

    LT-800 Setup Instructions Unpack the Product Remove outer packaging and plastic cover. Verify all components are present and no physical damage has occurred to the product. Mount LT-800(s) in Rack (if desired) If rack mounting the transmitter(s), install the optional rack mount kit (part LA-326) according to the instructions included with the kit.
  • Page 35 LT-800 Setup Instructions Set RF power Set the RF POWER switch on the back of the unit to Full, ½ or ¼ (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 transmitter’s output power to its lowest level to reduce the possibility of interference.

  • Page 36: Operating Instructions

    LT-800-863 Operating Instructions Power Unit On Turn power on by pressing the power button. Power Button Select a Channel Select the transmit channel by pressing the channel select UP and DOWN buttons. Channel select up and down buttons Lock on Channel Once you determine your transmit channel, you can lock the transmitter on that channel.
  • Page 37 LT-800 Operating Instructions Test Tone (if necessary) To broadcast a test tone, press the test tone button. This helps to test the system when no audio source is available. Test Tone Button Adjusting Audio Levels 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 to Input 2.
  • Page 38 LT-800 Operating Instructions Adjusting the Contour knob Adjust the contour knob counterclockwise if your audio source is mostly voice. Adjust the knob clockwise if your audio source is mostly music. The contour knob adjusts the relative equalization of the unit. This equalization boosts or cuts frequencies above 5 kHz.
  • Page 39 LT-800 Operating Instructions Process Mode Process mode is used for Audio Gain Control (AGC). With the process mode enabled, the LT-800 will automatically adjust for inconsistent signal input levels by raising or lowering the signal level accordingly to provide a consistent sound output level. This feature should be used in applications where a consistent sound level is important and the input levels vary substantially.

  • Page 40: Accessories

    Accessories for LT-800-863 Accessories LA-131 LA-280 Antenna Kit for Rack Mount ¼ in. to 3.5 mm (863 MHz) Microphone Adapter for LT-800/LT-82 LA-261 LA-278 Lavalier Microphone Behind-the-Head Microphone LA-326 LA-130 Universal Rack Mounting Kit Remote Antenna Kit (863 MHz)

  • Page 41: Notes

    Notes...
  • Page 42 Notes...
  • Page 43 Notes...
  • Page 44 Notes...
  • Page 49 LR-400/500 User’s Manual Table of Contents Specifications Block Diagram Quick Reference Setup Instructions Operating Instructions Programming Instructions (LR-500 only) Accessories Notes LR-400/500 Package Contents • LR-400/500 • Quick Reference card LR-500 LR-400 Portable Programmable Portable Display Display FM Receiver FM Receiver (863 MHz) (863 MHz) Listen Configurations...

  • Page 51: Specifications

    LR-400 Specifications Architectural Specification The LR-400-863 FM receiver shall be capable of receiving on 17 wide band channels with a SNR of 70dB or greater. The device shall be able to be locked on a single channel. The receiver shall be capable of seeking channels.
  • Page 52 LR-500 Specifications Architectural Specification The LR-500-863 FM receiver shall be capable of receiving on 17 wide band channels with a SNR of 70dB or greater. The receiver shall be programmable to electronically lock out unneeded channels. The receiver shall be capable of seeking channels. The device shall be able to be locked on a single channel.

  • Page 53: Block Diagram

    LR-400/500 Block Diagram LCD Display Down Power Supply CPU Module Seek Universal 115/230VAC Power charge indicator Power Supply 50/60 Hz Red LED (not included) NiMH Alkaline (2) AA Batteries ALkaline or NiMH POWER ANTENNA Companding RF Modulation Pre-emphasis Q-Technology VOLUME 3.5 mm Connector Sleeve Ring...

  • Page 54: Quick Reference

    LR-400 Quick Reference 3.5mm Input Jack: Connect a listen earpeice here. LED: When lit, indicates unit has power. On/Off and Volume Control Dial. Look&Listen™ Display: Shows receive level,channel, battery status, and lock status. Articulating Flexible Antenna Power/ Seek button: Allows the user to charging port change channels or look on a channel.
  • Page 55 LR-500 Quick Reference 3.5mm Input Jack: Connect a listen earpeice here. LED: When lit, indicates unit has power. On/Off and Volume Control Dial. Look&Listen™ Display: Shows receive level,channel, programming, battery status, and lock status. Articulating Flexible Antenna Power/ Seek button: Allows the user to charging port change channels or look on a channel.

  • Page 56: Setup Instructions

    LR-400/500 Setup Instructions Remove the product Remove outer packaging and plastic cover. Inspect for physical damage. If damage is apparent, please contact the dealer from which the product was purchased or Listen Technologies Corporation technical support for assistance (refer to page 72 for contact information). Open the front access door If locked, use a pocketknife or small screwdriver to unlock the door locks on both sides of the unit.
  • Page 57 LR-400/500 Setup Instructions Place Batteries in Unit Place two AA batteries in the compartment, making note of the battery polarity shown in the battery compartment, and again verifying that the BATTERY SELECT switch is in the correct position for the batteries you are using.
  • Page 58 LR-400/500 Setup Instructions Turn the Unit On Receivers are turned on by rotating the volume dial counterclockwise. The red LED on top of the unit should activate and the LCD display should illuminate. If they do not, make sure you have installed the batteries correctly and that you are using fully charged batteries.

  • Page 59: Operating Instructions

    LR-400/500 Operating Instructions Turn Unit On Volume knob Rotate the volume knob counterclockwise with an earphone or headset connected to the unit. WARNING: Excessive volume may result in hearing damage. Antenna Placement Antenna Position Raise the antenna to the upright position. When the antenna if fully extended, it will click into position.
  • Page 60 LR-400/500 Operating Instructions Select the channel using SEEK Another way to find a channel on the LR-400/500 is to use the SEEK button. When you do this, the Listen receiver looks for the next active channel. Sometimes the unit will mistake interference for a real broadcast signal. If you get interference, press the SEEK button again.
  • Page 61 LR-400/500 Operating Instructions Locking the Receiver on One Channel The unit can be electronically locked on one channel so that it will not change channels even if the “SEEK” button is pressed. It is recommended to lock the receiver on a channel that is being used in a single channel system or when mul- tiple systems are in the same area.
  • Page 62 LR-400/500 Operating Instructions Squelch Programming Entering Squelch Program Mode Turn unit off Press and hold the SEEK button; while holding SEEK button down, turn the ON/OFF/VOLUME dial to turn the unit on. Release the SEEK button when the Listen name disappears (approximately 2 seconds) and a two digit display is seen.
  • Page 63 LR-400/500 Operating Instructions Squelch The purpose of squelch is to mute the audio output of your receiver when the signal from the transmitter is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone.
  • Page 64 LR-400/500 Operating Instructions DX/Local DX is the normal operational mode. Local mode can effectively limit any inter-modulation and/or interference in a busy RF enviorment. This is done by limiting the amount of RF gain in the receiver. When local mode is selected, the range of the receiver is compromised. Depending on your application and environment, Local mode may be necessary for better performance.

  • Page 65: Programming Instructions (Lr-500 Only)

    LR-500 Programming Instructions (LR-500 only) Program Mode Overview The LR-500 is a programmable receiver. In applications where users are required to select a channel (such as language interpretation or classrooms), it may not be necessary for the receiver to search 17 channels looking for the appropriate channel. The LR-500 can lockout unused channels so the user can toggle only between occupied frequencies Entering Program Mode To enter program mode...

  • Page 66: Accessories

    Accessories for LR-400/500 Accessories LA-163 LA-162 Replacement Cushions for Stereo Ear Buds LA-161 Ear Buds (20) Single Ear Bud LA-164 LA-165 Ear Speaker Stereo Headphones LA-166 Neck Loop LA-311 16-Unit Portable Charging/Carrying Case LA-313 16-Unit Portable Carrying Case LA-317 4-Unit Portable Charging/Carrying Case LA-318 4-Unit Portable Carrying Case LA-170...

  • Page 67: Notes

    Notes...
  • Page 68 Notes...
  • Page 73 Supplementary Information Table of Contents Battery Charging Information Frequency Chart Troubleshooting Frequently Asked Questions Compliance, Warranty and Contact Information Notes...

  • Page 75: Battery Charging Information

    Battery Charging Information The Listen receivers are unique because they have SmartCharge™ chargers built in. When any of these units are connected to an LA-208 wall transformer or dropped into a Listen charging case, NiMH batteries will be charged. SmartCharge™ uses a pulse charging, which greatly extends the life of Nickel Metal Hydride (NiMH) batteries. The entire charging process takes about 13 hours.

  • Page 76: Frequency Chart

    Frequency Chart Frequencies...

  • Page 77: Troubleshooting

    Troubleshooting Troubleshooting The LT-800 has no power. Make sure the LA-207-03 power transformer 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. 1.

  • Page 78: Troubleshooting

    Troubleshooting Troubleshooting There is interference in my transmission. Ensure that the transmitter and receivers are on the same channel. Verify that there are no other transmitters on the same channel or a close channel to the one exhibiting interference. Try different channels until you find a clear channel.

  • Page 79: Frequently Asked Questions

    Frequently Asked Questions Frequently Asked Questions Does the LT-800 include the rack mount? No, but the LT-800 may be ordered in a rack mountable system. Do I need a transmitter for each audio source? No, Each Transmitter can mix two different input sources. What is the range of the LT-800 Transmitter? 1,000 ft.
  • Page 80 Frequently Asked Questions Frequently Asked Questions Can the receiver be “locked” on a channel if I need that? Yes. All Listen receivers can be locked. What is the battery life of a receiver? 20 hours using alkaline batteries. 12 hours using NiMH batteries.

  • Page 81: Compliance, Warranty And Contact Information

    All Listen European markets are supported through the Listen Technologies GmbH office located in Oberasbach, Germany. For more information on Listen solutions, contact Listen Technologies at +1.801.233.8992, +1.800.330.0891 North America, Listen Technol- ogies GmbH at +49 911 955159-0 or visit www.listentech.com For Europe, Middle East, Africa and India office visit www.listentech.de. 14912 Heritagecrest way Listen Technologies GmbH Salt Lake City, Utah U.S.A.

  • Page 82: Notes

    Notes...
  • Page 84 Listen Technologies Corporation 14912 Heritagecrest Way Salt Lake City, Utah 84065-4818, U.S.A. 801.233.8992 800.330.0891 North America 801.233.8995 www.listentech.com Printed in the United States of America © 2007 Listen Technologies Corporation All Rights Reserved 200752 ®...

This manual is also suitable for:

863 .200863 .400863.500

Table of Contents