Listen Technologies LT-84 User Manual
Listenir transmitter/radiator combo and expansion radiator
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Summary of Contents for Listen Technologies LT-84
- Page 1 U s e r M a n u a l I n s t a l l a t i o n a n d O p e r a t i o n LT-84 ListenIR Transmitter/Radiator Combo LA-141 ListenIR Expansion Radiator...
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Page 2: Table Of Contents
Compliance Notice, FCC and Industry Canada Statements ....................3 System Overview ....................................4 LT-84 ListenIR Transmitter/Radiator Combo ...........................5 Package Contents .....................................5 LT-84 Rear View Quick Reference ..............................5 LA-141 ListenIR Expansion Radiator ............................6 Package Contents .....................................6 LA-141 Rear View Quick Reference ...............................6 LT-84 and LA-141 Coverage ................................7... -
Page 3: Safety Cautions
LT-84, LA-141 or other equipment and will void the warranty. Hearing Safety: The LT-84 is designed to be used with Listen Technologies receivers. These receivers are designed to amplify audio to a high volume level which could potentially cause hearing damage if used improperly. To protect your hearing, make sure the volume is turned down before putting on the ear speaker or headphones, then adjust the volume up to the minimum setting require to hear clearly. -
Page 4: Compliance Information
Compliance Information No FCC license or radio approval is required to operate this equipment. Compliance Notice, FCC and Industry Canada Statements 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. -
Page 5: System Overview
For better line of sight coverage or for coverage in larger areas the LT-84 can be combined with up to four (4) LA-141 Listen IR Expansion Radiators. The LA-141s are connected in a daisy chain fashion to the LT-84 via a 24 AWG unschielded CAT-5e cable. -
Page 6: Lt-84 Listenir Transmitter/Radiator Combo
Package Contents LT-84 ListenIR Transmitter/Radiator Combo LA-210 12 VDC Universal Power Supply Power Cord LA-344 Mounting Hardware (2) Phoenix Type Connectors LT-84 Stationary IR Transmitter/Radiator Combo Quick Start Guide LA-303 Small Room Signage Kit Power Cord (2) Phoenix Type Connectors... -
Page 7: La-141 Listenir Expansion Radiator
LA-141 ListenIR Expansion Radiator Package Contents LA-141 ListenIR Expansion Radiator (1) 25 ft. (7.6 m) CAT-5e Cable LA-344 Mounting Hardware Quick Start Guide LA-141 Listen IR Transmitter/Radiator Combo LA-344 Mounting Hardware (1) 25 ft. (7.6 m) CAT-5e Cable Pan & Tilt 1/4”... -
Page 8: Lt-84 And La-141 Coverage
LLR-4200-IR or LR-5200-IR receiver. Figure 1: LT-84 or LA-141 Single Unit Coverage Pattern “footprint” 1 & 2 Channel Transmission Figure 2: LT-84 and LA-141 Single Channel Coverage Pattern “footprint” from same emission point... - Page 9 Figure 3: LT-84 and LA-141 Single Channel Coverage Pattern “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 8...
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Page 10: Designing A System
When mounted above and angled down into the listening audience 9 – 16 ft. (2.8 - 4.9 m) high and at an angle between 10 and 30 degrees. Examples below are provided for design concept only and do not represent the actual LT-84 coverage pattern “footprint”. Direct Line-Of-Sight Coverage... -
Page 11: Flexible Mounting Hardware Instructions
Threaded Mounting Socket ¼” x 20 (6mm x 1.0 thread) The LT-84/LA-141 have a ¼” 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 ¼”... -
Page 12: Wall Surface Mounting Example
Wall Surface Mounting Example Wall Mount Ceiling Surface Mounting Example Ceiling Mount Solid ceiling surface or T bar grid mounting Mounting Two Units with Linking Mount Example Linking Mount PAGE 11... -
Page 13: Interconnection And Control
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. -
Page 14: Connection Of External Audio Sources
With a typical audio source connected adjust the audio level adjustment up or down until the green.LED.is.solid.green.and.the.red.LED.flickers.red.occasionally.with.peaks.in.the.audio... Note: LT-84 will enter Power Save Mode after 15 minutes of no audio. This state is indicated by the Green LED.(Power.indicator).on.the.expansion.link.output.RJ-45.flashing.slowly. PAGE 13... -
Page 15: Ir Frequency Selection/Control
IR Frequency Selection/Control The LT-84 provides the ability for the user to select the IR carrier frequency to be used for transmission of the audio connected to the channel input. The carrier frequencies are at 2.3MHz, 2.8MHz, 3.3MHz, and 3.8MHz. -
Page 16: Listenir Expansion Link Rj-45 Connections
The coverage area of the LT-84 can be extended by adding up to four (4) LA-141 Expansion Radiators. A maximum of two (2) LA-141s can be connected to each Expansion Link output RJ-45 on the LT-84 with a maximum daisy chained CAT-5e cable length of 100 ft. (30.5 m). CAT-5e cable must be at least 24 AWG! Refer to the diagram below. -
Page 17: Indicator Lights
Green.LED.Off.and.Red.LED.Ch1.and.Ch2.flashing.quickly.4.times. with.a.2.second.off.state,.repeated.–.Frequency.selectors.are.set. Level to the same frequency and transmission switch is active on both Indicators channels (error state) LT-84 RJ-45 Green and Amber LED Indicators: Amber LED Expansion Link Green.LED.OFF.–.Power.switch.is.Off.or.in.the.indicator. (Status Indicator) Output RJ-45 lights.Off.position,.bad.power.supply.or.not.connect.to. -
Page 18: Troubleshooting
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 the receivers work but others do not, check the battery and/or earphones. -
Page 19: L T-84.Specifications
Power Supply Output 12 VDC, 4A, 48W, center positive, 2.5 mm ID barrel connector Power Line Cord North America Type B (LT-84-01), Asia and UK Type G (LT-84-02), Euro Type J (LT-84-03) Carrier Frequencies 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz, selectable... -
Page 20: La-141 Specifications
12 VDC, provided via LT-84 Expansion Link Output RJ-45s Current Draw 600 mA per LA-141, maximum of two (2) LA-141s daisy chained with CAT-5e cable 24 AWG to each LT-84 Expansion Link Output Carrier Frequencies 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz... -
Page 21: Warranty Information
Listen warrants it’s Listen IR Radiators (LA-140, LT-84, LA-141) to be free from defects in workmanship and material under normal use and conditions for three years from the date of purchase. -
Page 22: Technical Support Contact
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... - Page 23 NOTES: PAGE 22...
- Page 24 +1.800.330.0891 North America +1.801.233.8995 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.
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