Gebruiksaanwijzing /service van het product LA-123 90 van de fabrikant Listen Technologies
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Assistive Listening • Language Interpretation • Sound fi eld • Tour Group • Conferencing Dear Valued Customer, Thank you for choosing Listen! All of us at Listen are dedicated to providing you with the highest quality products available.
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Design Guide LT-803-072 LR-200-072 Supplementary Value Package Table of Contents Design Guide FM Technology Overview 5 System Overview 6 Key Concepts in Value Package Setup 7 Alternative Options for V.
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3 Design Guide Value Package Design Guide Table of Contents FM Technology Overview 5 System Overview 6 Key Concepts in Value Package Setup 7 Alternative Options for Value Package Setup 11 Notes 13 Val.
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5 Design Guide 72 S T A N D A R D R E C E I V E R LT- 80 3 Audio Source FM Transmitter FM Receiver 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.
6 Design Guide System Overview There are four main components to the Value Package – the transmitter, antenna, receiver and input source. The input source can be audio from a sound board, microphone or a personal audio source like a CD player, MP3 player, computer, DVD, etc.
7 Design Guide Input 1 offers a choice of balanced XLR or ¼ in. phono connector. Plug an audio source into Input 1: move the input select switch to the type of input source being used. Select “Line” for Line Inputs, “Mic” for dynamic microphones or “Mic + PH Power” for condenser microphones.
8 Design Guide L T-803 L T-803 Key Concepts in Value Package Setup The LT-803-072 can accommodate multiple inputs simultaneously with the use of the input level potentiometer. When multiple inputs are present, both input level lights will be activated.
9 Design Guide L T-803 LT- 8 0 3 T est T one Use the test tone to transmit a 400 Hz tone. This tone will allow the end user to know if the system is transmitting properly.
10 Design Guide Key Concepts in Value Package Setup Antenna placement (rear) Rear mounted antenna Rear mounting the LA-123 90° Helical Antenna (72 MHz) will allow the transmitter to be moved if necessary. For proper and dependable operation, Listen receivers need to receive a strong and consistent signal from the originating transmitter.
11 Design Guide Remote antenna The LA-122 Universal Antenna Kit (72 and 216 MHz) and the LA-116 Coaxial Dipole Remote Antenna (72 MHz) connect to the LT-803-072 and can be placed away from the transmitter for better range. They also allow the unit to be rack mounted with the antenna remotely using the LA-326 Universal Rack Mounting Kit.
12 Design Guide Key Concepts in Value Package Setup The antenna can also be in the front of the rack with the use of the LA-125 Antenna Kit for Rack Mount (72 MHz) and the LA-326 Universal Rack Mounting Kit. R ack Mounting the T ransmitter The LT-803-072 can be rack mounted if necessary.
13 Design Guide Notes.
14 Design Guide Notes.
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18 LT-800 LT-803-072 Listen Con fi gurations • LT-803-072-01 (North America) • LT-803-072-02 (Asia/UK) • LT-803-072-03 (Euro) LT-803-072 User’s Manual Table of Contents Speci fi cations 20 B.
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20 LT-800 LT-803-072 LT-803-072 Speci fi cations Architectural Speci fi cation The Stationary FM Transmitter shall be capable of broadcasting on one of any three channels – A (72.100 MHz), E (72.900 MHz) or H (75.900 MHz). The transmitter shall have a SNR of 62 dB or greater.
21 LT-800 LT-803-072 LT-803-072 Block Diagram Power Supply CPU Module Transmitter RF Board Pre-emphasis Processing Listen LCD Display Backlit Universal Power Supply (provided) Input 1 VU Meter Input L.
22 LT-800 LT-803-072 LT-803-072 Quick Reference L T -803 FM T ransmitter Input Level Indicators: Shows audio Input 1 and Input 2 levels. Input 1 and 2: Adjust audio input levels of Input 1 and Input 2 here. Power Button: Turns unit On/Off. Test Tone: Activates a tone to aid system setup.
23 LT-800 LT-803-072 LT-803-072 Setup Instructions 1 Unpack the Product Remove outer packaging and plastic cover. Verify all components are present and no physical damage has occurred to the product. 2 If rack mounting the transmitter(s), install the optional rack mount kit (LA-326) according to the instructions included with the kit.
24 LT-800 LT-803-072 XLR Wiring Input from Balanced Audio Source Unbalanced Audio Source 1/4 in. Phono Wiring Balanced Tip Ring Sleeve Unbalanced Top Ring Top Ring/Sleeve Audio from Balanced Audio Sou.
25 LT-800 LT-803-072 L T -803 LT-803-072 Operating Instructions 1 Po wer Unit On 2 Selec t a Channel Select the transmit channel (A, E, H) by pressing the channel select UP/DOWN buttons. 3 Lock on Channel Once you determine your transmit channel, you can lock the transmitter on that channel.
26 LT-800 LT-803-072 LT-803-072 Operating Instructions T est T one (if necessary) Adjust Audio Input L evel Turn the input knob counter-clockwise to add gain to Input 1. This will decrease gain to Input 2. Turn input knob clockwise to add gain to Input 2.
27 LT-800 LT-803-072 L T -803 Adjusting the Cont our knob Turn the contour knob counter-clockwise if your audio source is mostly voice. Turn the knob clockwise if your audio source is mostly music. The contour knob adjusts the relative equalization of the unit.
28 LT-800 LT-803-072 Process Mode Process mode is used for Audio Gain Control (AGC). Press and hold the down button for 10 seconds to activate program mode.
29 LT-800 LT-803-072 Accessories for LT-803-072 v Accessories Antennas LA-80 2-Way RF Antenna Combiner LA-81 4-Way RF Antenna Combiner LA-82 6-Way RF Antenna Combiner LA-101 Helical Top Mounted Antenn.
30 Design Guide Notes.
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34 LT-800 LR-200-072 LR-200-072 Package Contents • (1) LR-200-072 Standard 3-Channel FM Receiver (72 MHz) • (1) Quick Reference Card Listen Con fi gurations • LR-200-072 LR-200-072 User’s Man.
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36 LT-800 LR-200-072 LR-200-072 Speci fi cations Architectural Speci fi cation The FM receiver shall be capable of receiving on three wide band channels. The receiver shall have a SNR of 62 dB or greater. The device shall have an audio frequency response of 50 Hz to 15 KHz, ± 3 dB at 72 MHz.
37 LR-200-072 LR-200-072 Block Diagram POWER ANTENNA 3.5 mm Connector VOLUME On Off de-emphasis RF de-modulation LCD Display Universal Power Supply (not included) Power Supply CPU Module Up Power char.
38 LT-800 LR-200-072 LR-200-072 Quick Reference 72 Alkaline Battery Select Channel Sel ect NiMH Battery Compartment: Place two (2) AA batteries in compartment. Be sure to follow polarity pattern. On/Off and Volume Control Dial Battery Select Switch: Choose the type of batteries being used - Alkaline or NiMH.
39 LR-200-072 72 Alkaline Bat tery Se lec t Cha nn el Sel ect NiMH LR-200-072 Setup Instructions Remo ve the product Remove outer packaging and plastic cover.
40 LT-800 LR-200-072 LR-200-072 Setup Instructions Insert two AA batteries 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.
41 LR-200-072 LR-200-072 Setup Instructions Receivers are turned on by rotating the volume dial counterclockwise. The red LED on top of the unit will illuminate. If it does not, make sure you have installed the batteries correctly and that you are using fully charged batteries.
42 LT-800 LR-200-072 Accessories for LR-200-072 Accessories LA-362 Headphones LA-161 Single Ear Bud LA-162 Stereo Ear Bud LA-164 Ear Speaker LA-165 Stereo Headphones LA-166 Neck Loop LA-170 Behind-the.
43 LR-200-072 Notes.
44 LT-800 LR-200-072 Notes.
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48 LT-800 Supplementary Supplementary Information Table of Contents Battery Charging Information 50 Frequency Chart 51 Troubleshooting 52 Frequently Asked Questions 54 Compliance, Warranty and Contact.
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50 LT-800 Supplementary Battery Charging Information Charging with a drop-in charger To charge the batteries using a drop-in charging case, simply place the unit into a slot in the charging case and connect the case to power. Make sure the unit is fully seated in its slot.
51 Supplementary Frequency Chart Channel Frequency (MHz) A 72.100 E 72.900 H 75.900.
52 LT-800 Supplementary Troubleshooting Troubleshooting The LT-803-072 has no power. Make sure the 12 VDC power transformer is connected to a power source and is connected to the jack marked “Power Input”. Make sure the PWR button is pressed in. There is no audio or the audio level is too low.
53 Supplementary 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.
54 LT-800 Supplementary Frequently Asked Questions Q What are the differences between the LR-200 and other Listen receivers? A The LR-200 offers three (3) frequencies and can be changed inside the door of the receiver via a switch. The LR-200 does not have an LCD screen, the ability to SEEK for open frequencies, SQ (Super Quiet) or programmability.
55 Supplementary Compliance Notice and FCC Statement Compliance Notice FCC Statement This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
56 LT-800 Supplementary Warranty and Contact Information Contacting Listen If technical service is needed, please contact Listen. Pre-authorization is required before returning Listen products. If products were damaged in shipment, please contact the carrier, then contact Listen for replacement or repair requirements payable by the carrier.
57 Supplementary Notes.
58 LT-800 Supplementary Notes.
© 2008 Listen Technologies Corporation ® All Rights Reserved 20080129 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 info@listentech.
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