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LT-803-072 Stationary FM Transmitter Specifications Block Diagram Quick Reference Setup Instructions Operating Instructions Accessories Notes 20 21 22 23 25 29 30 LR-200-072 FM Receiver Specifications Block Diagram Quick Reference Setup Instructions Accessories Notes 36 37 38 39 42 43 Supplementary Information Battery Charging Information Frequency Chart Troubleshooting Frequently Asked Questions Compliance, Warranty and Contact Information Notes 50 51 52 54 55 57 LR-200-072 5 6 7 11 13 LT-803-072
FM Technology Overview System Overview Key Concepts in Value Package Setup Alternative Options for Value Package Setup Notes Design Guide Value Package Design Guide Table of Contents 5 6 7 11 13 Value Package Contents • (1) LT-803-072 Stationary 3-Channel FM Transmitter • (4) LR-200-072 Standard 3-Channel FM Receiver • (1) LA-123 90° Helical Antenna • (4) LA-161 Single Ear Bud • (1) LA-304 Assistive Listening Notification Signage Kit • (1) LA-207 12 VDC Power Supply • (1) Installation Guide LA-161 Singl
Design Guide 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.
Design Guide System Overview There are four main components to the Value Package – the transmitter, antenna, receiver and input source. 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. Audio will be connected into the audio inputs of the Stationary Transmitter. Transmitter The LT-803-072 transmitter modulates the audio on an FM carrier and transmits the signal via an antenna.
Design Guide Key Concepts in Value Package Setup Input Selection The LT-803-072 has two audio input options: Input 1 and Input 2. Input 1 is a balanced connection using either an XLR or ¼ in. phono connector, and input 2 is two unbalanced phono connectors. Use Input 1 if you are using a microphone or if you have a balanced connection such as a professional audio mixer (you can also use Input 1 for unbalanced connections). Use Input 2 to connect to an unbalanced audio source. Balanced XLR or 1/4 in.
Design Guide Key Concepts in Value Package Setup Using Multiple inputs 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. 3 LT-80 Input Level Knob Mix Level The mix level acts as the “master transmit” control. It will increase the transmit gain on the “mix” of the two levels (if two levels are in use).
Design Guide Key Concepts in Value Package Setup 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 transmitters and other outside FM signals.
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. Maximizing Transmission Range For proper and dependable operation, Listen receivers need to receive a strong and consistent signal from the originating transmitter.
Design Guide Alternative Options for Value Package Setup 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. Both the LA-122 and LA-116 come with 25’ of black coaxial cable (RG-58).
Design Guide Key Concepts in Value Package Setup Rack Mounting the Transmitter The LT-803-072 can be rack mounted if necessary. With the use of the Listen LA-326 Universal Rack Mount Kit, you can mount one or two transmitters to the standard 19” rack. The rack mounted unit will take 1 ru of space. LT-803 FM Transmitter LT-803 FM Transmitter Rack Mount with dual units installed. LT-803 FM Transmitter Rack Mount with single unit installed.
Design Guide Notes 13
Design Guide Notes 14
LT-803-072 User’s Manual Table of Contents Specifications Block Diagram Quick Reference Setup Instructions Operating Instructions Accessories Notes 20 21 22 23 25 29 30 Listen Configurations LT-803-072 LT-800 • LT-803-072-01 (North America) • LT-803-072-02 (Asia/UK) • LT-803-072-03 (Euro) LT-803-072 Package Contents • (1) LT-803-072 Stationary 3-Channel FM Transmitter • (1) LA-207 12 VDC Power Supply • (1) Quick Reference Card LT-803 LT-803-072 Stationary 3-Channel FM Transmitter Quick Reference Card
LT-803-072 Specifications Architectural Specification 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. 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 response of 50 Hz to 15k Hz, ± 3 dB at 72 MHz. It shall have two (2) mixing audio inputs.
LT-803-072 Block Diagram POWER On 115/230VAC 50/60 Hz Universal Power Supply (provided) 12VDC, 1.
LT-803-072 Quick Reference Mix Level: Shows mixed audio output level. Input 1 and 2: Adjust audio input levels of Input 1 and Input 2 here. Process LED: Indicates audio processing mode is active. Press and hold the down button for 10 seconds to activate program mode. Press up button to toggle process On/Off. Input Level Indicators: Shows audio Input 1 and Input 2 levels. Monitor Jack: Plug in earphone(s) to monitor audio.
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 Mount LT-803-072(s) in Rack (if desired) If rack mounting the transmitter(s), install the optional rack mount kit (LA-326) according to the instructions included with the kit. LT-803 FM Transmitter 3 LT-803 FM Transmitter LT-803 FM Transmitter Rack Mount with dual units installed.
LT-803-072 Setup Instructions 5 Set RF power Set the RF POWER switch on the back of the unit to High, Medium, or Low (Level is indicated on the LCD display by number of dots above Listen logo). 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.
LT-803-072 Operating Instructions 1 Power Unit On 3 LT-80 LT-803-072 LT-800 Power Button 2 Select a Channel Select the transmit channel (A, E, H) by pressing the channel select UP/DOWN buttons. 803 T--8 T LT Channel select UP/DOWN buttons 3 Lock on Channel Once you determine your transmit channel, you can lock the transmitter on that channel. To lock a channel hold the Channel Select UP button for 3 seconds until the padlock icon appears on the display.
LT-803-072 Operating Instructions 4 Test Tone (if necessary) LT-803-072 LT-800 Use the test tone to transmit a 400 Hz tone. This tone will allow the receiver to know if the system is transmitting properly. All receivers should be able to hear this tone if tuned to the proper channel. 3 LT-80 Adjusting Audio Levels 1 Test Tone Button Adjust Audio Input Level Turn the input knob counter-clockwise to add gain to Input 1. This will decrease gain to Input 2.
LT-803-072 Operating Instructions 2 Adjusting the Contour 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. This equalization boosts or cuts frequencies above 5 kHz. LT-803-072 LT-800 3 LT-80 Contour Knob 3 Adjust Mix Level Adjust the mix level until the right VU meter occasionally illuminates the red LED.
LT-803-072 Operating Instructions 4 Process Mode LT-803-072 LT-800 Process mode is used for Audio Gain Control (AGC). Press and hold the down button for 10 seconds to activate program mode. Press up button to toggle process On/Off. With the process mode enabled, the LT-803-072 will automatically adjust for inconsistent signal input levels by raising or lowering the signal level accordingly.
Accessories for LT-803-072 v Accessories Antennas LA-123 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 Antenna (72MHz) LA-106 Telescoping Top Mounted Antenna (72 MHz) LA-116 Coaxial Dipole Remote Antenna (72MHz) LA-122 Universal Antenna Kit (72 and 216 MHz) LA-123 90˚ Helical Antenna (72 MHz) LA-125 Antenna Kit for Rack Mount (72 MHz) LT-803-072 LT-800 Power Supply LA-207-01 12 VDC Replacement Power Supply for LT-803-072 (No
Design Guide Notes 30
LR-200-072 User’s Manual Table of Contents Specifications Block Diagram Quick Reference Setup Instructions Accessories Notes 36 37 38 39 42 43 Listen Configurations • LR-200-072 LR-200-072 Package Contents • (1) LR-200-072 Standard 3-Channel FM Receiver (72 MHz) • (1) Quick Reference Card 72 Quick Reference Card LR-200-072 LT-800 LR-200-072 Standard 3-Channel FM Receiver (72 MHz) IVER RECE DARD STAN 34
LR-200-072 Specifications Architectural Specification 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. The device shall incorporate a stereo headset jack that allows the user to plug in either a mono or stereo earphone(s). The unit shall operate with (2) AA batteries.
LR-200-072 Block Diagram Up LCD Display Down Power Supply CPU Module 115/230VAC 50/60 Hz Seek Universal Power Supply (not included) Alkaline Power charge indicator Red LED NiMH (2) AA Batteries ALkaline or NiMH POWER On Off ANTENNA RF de-modulation de-emphasis VOLUME Tip 3.
LR-200-072 Quick Reference 3.5 mm Output Jack: Connect a Listen earphone(s) here. LED: When lit, unit is On or charging. When batteries are low, the LED flashes. On/Off and Volume Control Dial 72 Power/Charging Port Battery Select Switch: Choose the type of batteries being used - Alkaline or NiMH. Front Door Lock Chan LR-200-072 LT-800 Channel Select Switch: There are 3 separate channels (A, E, H) available.
LR-200-072 Setup Instructions 1 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 55 for contact information). 2 Open the front access door If locked, use a small screwdriver to unlock the door locks on both sides of the unit. To unlock the door, rotate the lock ¼ turn counterclockwise.
LR-200-072 Setup Instructions 4 Channel Select Set channel select switch to desired channel (A, E, H). Make sure that the channel on both receiver and transmitter are the same. Channel Select Switch 5 Place Batteries in Unit 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. (Alkaline should be selected for all battery types other than NiMH).
LR-200-072 Setup Instructions 7 Turn the Unit On 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. 72 ER D DAR STAN 8 IV RECE Adjust the volume control Use the control dial on the top of the unit to adjust the volume to a comfortable level.
Accessories for LR-200-072 Accessories Headphones LA-170 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-Head Stereo Headphones LA-171 Noise Canceling Headphones Power/Charging Supplies LA-202 Power/Charging Supply for FM Portable Products LA-202 Cables LA-265 Consumer Camcorder Cable LA-266 Professional Camcorder Cable LA-275 Sacrificial Cable LA-266 Charging/ Carrying Cases with Removable Lid LR-200-072 LT-800 LA-311-01 16
Notes LR-200-072 43
LR-200-072 LT-800 Notes 44
Supplementary Information Table of Contents Supplementary LT-800 Battery Charging Information Frequency Chart Troubleshooting Frequently Asked Questions Compliance, Warranty and Contact Information Notes 48 50 51 52 54 55 57
Battery Charging Information The LR-200-072 receiver uses a trickle charging method. When one of these receivers is placed into a Listen charging case any NiMH batteries will be charged. The entire charging process takes 10-12 hours under normal conditions. During the charging cycle, the red LED on top of the Listen product will remain illuminated. When not using the receiver, it is recommended to leave the unit in the charging case or plugged into the LA-202 power source.
Frequency Chart Channel A E H Frequency (MHz) 72.100 72.900 75.
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. 1. 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.
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. Please contact Listen for more ideas on troubleshooting the interference. End users are adjusting the unit.
Frequently Asked Questions Frequently Asked Questions Q What is the range of the LT-803-072 transmitter? A Line of site up to 1000 ft. (304.8 m). Q Does the LT-803-072 include the rack mount? A No, but an LA-326 Universal Rack Mounting Kit is available for purchase. Q Do I need a transmitter for each audio source? A Yes. Q Is there a limit to the number of transmitters I can use in one room? A Yes, a maximum of 3. Q How many receivers can I have on a system? As many as you want.
Compliance Notice and 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 and Contact Information Warranty Listen Technologies Corporation (Listen) warrants its transmitters and receivers (models LT-700, LT-800, LT-803, LR-42, LR-44, LR-100, LR-200, LR-300, LR-400, LR-500 and 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.
Notes Supplementary 57
Supplementary LT-800 Notes 58
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.com Listen Technologies GmbH Jasminstr. 16 905 22 Oberasbach, Germany +49 911 955159 0 EMEAI +49 911 955159 40 Fax www.listentech.de info@listentech.
