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PAGE 21

Technical Support Contact 

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.

Listen’s.corporate.headquarters.are.located.in.Bluffdale,.Utah.U.S.A..and.are.open.Monday.through.
Friday, 8am to 5pm Mountain Time.

LISTEN TECHNOLOGIES

14912 Heritage Crest Way

Bluffdale,.Utah.84065-4818

+1.801.233.8992

+1.800.330.0891 North America

+1.801.233.8995 Fax

[email protected]

www.listentech.com

Summary of Contents for LT-141

Page 1: ...PAGE 0 Installation and Operation LT 84 ListenIR Transmitter Radiator Combo LA 141 ListenIR Expansion Radiator User Manual ...

Page 2: ...ning a System 9 Flexible Mounting Hardware Instructions 10 Mounting Hardware Kit 10 Mounting Provision Thread x 20 6mm x 1 0 thread 10 Wall Surface Mounting Example 11 Ceiling Surface Mounting Example 11 Mounting Two Units with Linking Mount Example 11 Interconnection and Control 12 Connection of the External Power Adaptor 12 Connection of External Audio Sources 13 I R Frequency Selection Control ...

Page 3: ...ar clearly Do not allow children or other unauthorized individuals to have access to this product without supervision Medical Device Safety Before using Listen Technologies receivers with an implantable or other medical device consult your implantable or other medical device physician or manufacturer Always make sure you are using this product in accordance with the safety guidelines established b...

Page 4: ...f not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the inte...

Page 5: ...rporate boardrooms courtrooms training rooms classrooms and theaters Its flexible audio inputs accept microphone consumer and line level inputs which are all mixed to the modulated IR transmission IR receivers then detect the modulated IR transmission and convert the IR signals back into an audio signal and presents it to headphones For better line of sight coverage or for coverage in larger areas...

Page 6: ...el Indicators Transmission On Off Green LED Power Indicator LT 84 Rear View This facility is equipped with a hearing assistance system Please ask for a receiver Este establecimiento está equipado con un sistema de asistencia auditiva Por favor solicite un receptor Cet éstablissement est équipé d un système d aide à l audition S il vous plaît demandez un récepteur Hearing Assistance Available Asist...

Page 7: ...J 45 Amber LED Status Indicator Green LED Power Indicator LA 141 Rear View LA 141 Rear View Quick Reference LA 141 Listen IR Transmitter Radiator Combo Quick Start Guide 1 25 ft 7 6 m CAT 5e Cable LA 344 Mounting Hardware Mounting Plate Cover Pan Tilt 1 4 x 20 Mount Adaptor Ceiling Tile Mounting Plate Flush Mounting Plate 2 Extension Bars All Thread Piece Pan and Tilt Lock Screw Hex Key Channel 1 ...

Page 8: ...coverage area is 30 000 ft2 2787 m2 and in 2 channel transmit mode the coverage area is 15 000 ft2 1394 m2 Use the diagrams below when evaluating a given space to determine the number of units required and placement of those units for best line of sight coverage with an LLR 4200 IR or LR 5200 IR receiver Figure 1 LT 84 or LA 141 Single Unit Coverage Pattern footprint 1 2 Channel Transmission Figur...

Page 9: ...attern footprint Overlapping 50 ft 15 24 m apart Figure 4 Single Channel Coverage Pattern footprint same emission point at an angle of 15 degrees off axis Figure 5 Single Channel Coverage Pattern fooptrint same emission point at an angle of 30 degrees off axis ...

Page 10: ...tprint to overlay the footprint on the room dimensions and determine the number of units required and the placement of those units to cover the desired listening audience Best performance is achieved When radiators face and have direct line of sight to audience When a system provides over lapping coverage like a sprinkling system When special coverage is provided for shaded areas like under a balc...

Page 11: ...ounting Socket x 20 6mm x 1 0 thread The LT 84 LA 141 have a x 20 thread 6mm x 1 0 thread hole located in the bottom and top of the enclosure This threaded hole is used to attach the units to the provided universal mounting kit or to any user provided mounting device using a x 20 thread 6mm x 1 0 thread Refer to the diagrams below of ceiling and wall mounting using the universal kit provided Mount...

Page 12: ...AGE 11 Wall Surface Mounting Example Ceiling Surface Mounting Example Mounting Two Units with Linking Mount Example Wall Mount Ceiling Mount Linking Mount Solid ceiling surface or T bar grid mounting or ...

Page 13: ...ersal switching power supply that can be used with an AC power source from 100 240 VAC 50 60Hz The overall length of the line cord and DC power cable is 10 ft 3 m Note that if the LT 84 is located further than 10 ft 3 m from the nearest AC outlet provisions will need to be made for extending the power 2 The Power Switch On OFF control is a three 3 position switch located to the right of the power ...

Page 14: ...er 3 A balanced audio input is provided through the three 3 pin Phoenix type connector This is a 4 dBu nominal level balanced input 4 To the right of the balanced input is the audio input level adjustment control This control rotates clockwise to increase the audio level counter clockwise to decrease the audio level From the factory this adjustment is set fully counter clockwise 5 A red and green ...

Page 15: ...stop the IR frequency is set to 2 3MHz Position 2 is 2 8MHz position 3 is 3 3 MHz and position 4 is 3 8MHz 2 The IR Transmission On Off switch is used to activate the IR signal transmission for this channel In the up position the IR signal is active In the down position the IR signal for this channel is NOT active Note If both channels are active and set to the same frequency the LT 84 will indica...

Page 16: ...2 Delay Com pensation switches to the same setting For a two channel application set Delay Compensation switches channel 1 and 2 independently Pick appropriate frequency row then move over to the overall cable distance from the LT 84 to the LA 141 being set this is the switch setting Cable Length 1 to 9 ft 10 to 19 ft 20 to 29 ft 30 to 39 ft 40 to 49 ft 3 to 2 8 m 3 to 5 8 m 6 to 8 8 m 9 1 to 11 9...

Page 17: ... to AC power outlet Green LED solid Power is applied to the unit Green LED flashing Unit has entered Power Save Mode Amber LED Off No Carrier present or problem with IR LEDs Amber LED solid Carrier is present and unit is actively transmitting IR LA 141 RJ 45 Green and Amber LED Indicators Green LED OFF LT 84 power switch is Off LT 84 has entered Power Save Mode LA 141 indicator lights switch in Of...

Page 18: ...for 15 minute Make sure the audio source is playing and plugged into the LT 84 properly Make sure the green level indicator is solid green and the red level indicator occasionally flashes red with audio peaks Make sure the receivers are operating on the same channel frequency as the LT 84 Make sure the LT 84 is transmitting IR light and that the IR light is not being blocked by objects If some of ...

Page 19: ...ators Power Supply LED Green LED on in line power supply indicates AC power is applied Audio Level Indicators Green LED indicates Audio presence and Red LED indicates peaks in the audio Green LEDs Power Solid Green indicates power is applied to unit flashing Indicator RJ 45 indicates unit has entered power save mode Amber LEDs Status Solid Amber indicates carrier is present and IR is being transmi...

Page 20: ...24 AWG dasiy chain of 100 ft maximum cable length Power Save Mode Shuts off carrier when no audio is present for 15 minutes Controls Indicator Lights Two 2 position switch Indicator Lights OFF Indicator Lights ON On Off Switch Indicators Green LEDs Power Solid Green indicates power is applied to unit Indicator RJ 45 Amber LEDs Status Solid Amber indicates carrier is present and IR is being transmi...

Page 21: ... of the product and cannot be transferred Warranty is only valid if warranty card has been returned within 90 days of purchase This warranty is void if damage occurred because of misuse or if the product has been repaired or modified by anyone other than a factory authorized service technician Warranty does not cover normal wear and tear on the product or any other physical damage unless the damag...

Page 22: ...ct the carrier then contact Listen for replacement or repair requirements payable by the carrier Listen s corporate headquarters are located in Bluffdale Utah U S A and are open Monday through Friday 8am to 5pm Mountain Time LISTEN TECHNOLOGIES 14912 Heritage Crest Way Bluffdale Utah 84065 4818 1 801 233 8992 1 800 330 0891 North America 1 801 233 8995 Fax support listentech com www listentech com...

Page 23: ...PAGE 22 NOTES ...

Page 24: ...95 Fax support listentech com www listentech com 2014 Listen Technologies Corporation All Rights Reserved For further details regarding use adjustment or programming of your Listen products visit our website at www listentech com support manuals or contact Listen at 1 801 233 8992 or 1 800 330 0891 20141229 ...

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