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The Lanyard IR Receiver shall be capable of receiving on four carriers (2.3, 2.8, 3.3, 3.8 MHz) and the channel shall be displayed on one of four front panel LEDs. The receiver will accept mono or stereo earphones with a 3.5 mm connector. The receiver shall be capable of being locked on a channel. The receiver shall be capable of receiving a stereo signal on each of the four carriers. The receiver shall have a SNR of 60 db or greater and have built in squelch control. The device shall have an audio frequency response of 63 Hz to 15 kHz, +/- 3db and shall have distortion of less than 2%. The device shall operate for 30 hours with two AAA alkaline batteries and 15 hours with two AAA NiMH rechargeable batteries. The receiver shall

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		Specifications	LR-44

		Carrier Frequencies	Selectable: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
		Number of Channels	Four (4) selectable channels
		IR Detectors	Two (2) detectors under front IR lenss
	RF	Sensitivity	One (1) nW/cm2 at 40 db SNR
		Frequency Accuracy	+/- .005% stability 0 to 50C
		Squelch	Automatic on loss of RF signal (40 db SNR)
		Compliance	FCC Part 15, Industry Canada, CE, RoHS

		** All system specifications are wireless end-to-end

		System Frequency Response	63Hz - 15kHz (+/- 3dB)
		System Signal to Noise Ratio	Mono: >60dB
	Audio	(A-weighted)	Stereo: >52dB
	Audio		Stereo: >52dB
		System Distortion	<2% total harmonic distortion (THD)
		Audio Output Jacks	3.5 mm connector unbalanced, mono or stereo headphones
		Audio Output Power	20 mW maximum at 32 ohms


	Controls	User Controls	Volume, Power, Channel Select

		Programming	Channel Lock, Auto Seek, Channel Lock-Out, Squelch
		Programming	Channel Lock, Auto Seek, Channel Lock-Out, Squelch


	Indicators	Unit Power	Indicated by current channel selection LED
	Indicators	Channel Selection	Red LED illuminates on the current channel selection
		Channel Selection	Red LED illuminates on the current channel selection

		Battery Type	Two (2) AAA alkaline batteries or NiMH battery pack
	Power	Battery Life	30 hours alkaline, 15 hours NiMH rechargeable pack
	Power		(LA-364)
			(LA-364)

		Battery Charging	Fully Automatic with NiMH battery pack and LA-350 charger

		Dimensions (H x W x D)	1.80 x 4.00 x 0.75 in. (46 x 102 x 19 mm)
		Color	Grey with White Silk Screening
	Physical	Unit Weight without batteries	1.75 oz. (49 g)
		Unit Weight with batteries	2.55 oz. (74 g)
		Shipping Weight	8.00 oz. (227 g)


		Temperature - Operation	-10 C (14 F) to +40 (104 F)

	Environmental	Temperature - Storage	-20 C (-4 F) to +50 (122 F)

		Humidity	0 to 95% relative humidity, non-condensing

•Specifications are subject to change without notification.

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$Listen Technologies LT-82LA, LR-42, LR-44, LA-351, LA-350 manual /DQ\DUG,55HFHLYHU6SHFLÀFDWLRQV$

Contents

Page Page VHUYLFHZH·UHKHUHWROLVWHQ +HUH·VKRZWRUHDFKXV Page Stationary Infrared Table of Contents Page Page Page Stationary Infrared Design Guide Table of Contents Design Guide Infrared Technology Overview System Overview Single Channel System Multiple Channel System Multi-channel system Key Concepts of Designing a Stationary IR System Each LT-82 transmitter used can power two LA-140 radiatorsMaximum length of CAT-5 power cable Maximum length of coaxial RF cable Determine the room size and shape Designing a SystemDetermine the number of audio channels Complete the room layout worksheet Vertical Polar Pattern Horizontal Polar PatternSingle Channel System Designing a System Designing a System 3B Height of Radiators 3C Radiator Mounting Angle Determine the number of radiators required Complete the system layout worksheet 5F Write in the CAT-5 power supply cable lengths 5D Draw a connecting line from the power supply output5E Cross out the unused power supplies 5G Determine the delay compensation for each radiator 6B Transmitter Rack Mounting Complete the system materials worksheet6A Transmitters 6C Radiators 6D Radiator Mounting Options 6E Radiator Power Supplies6H Other Accessories Dual radiator mounting DesignDesign GuideGuide Page Room Layout Worksheet Page System Layout Worksheet Page DesignDesignLA-140GuideGuide DesignLT-82Guide Page System Materials Worksheet USAPage Page Page Page Page LT-82 User’s Manual Table of Contents LT-82 Package ContentsPage 6SHFLÀFDWLRQV LT-82 Block Diagram Power LT-82 Quick Reference 7UDQVPLW/HYHO,QGLFDWRU6KRZVPLHGDXGLROHYHO Unpack the Product LT-82 Setup and Operating InstructionsConnect LT-82 RF Signal to Radiators Mount LT-82s in Rack if desired Powering the LT-82 Connect LT-82 Power to Radiatorsif desired6B Press the Power button Select Operating Channel 7B RF-Off Channel Setting Information7A Select the operating channel Connect Audio Inputs 8A If using Input8B If using Input 8C Test Tone if necessary Set Stereo and Process Features Set Auto-Timeout Feature Accessories for LT-82 $FFHVVRULHV DesignLT-82Guide DesignLTLT-82-82Guide DesignLT-82Guide Page Page Page Page LA-140 User’s Manual Table of Contents LA-140 Package ContentsPage $6SHFLÀFDWLRQV LA-140 Quick Reference DUULHU3UHVHQW*UHHQ Connect Power LA-140 Setup and Operating InstructionsConnect RF Signal Mount Radiator Set Termination Switch Set Delay Compensation SwitchSet LED Indicator Shutoff Switch SW1 9A Red LED Set Compatibility Switch SW2Front LED Indicators 9B Yellow LED Overview LA-140 Mounting your RadiatorMounting Hardware Pieces Screw Wall Box Plate to wall Installation StepsWall Box Mounting Attach Tilt Arm a Determine correct angle Attach Safety Mounting CablePull CAT-5 and Coaxial cables through if necessary Attach Radiator to Wall Box Plate Hollow Wall Mounting Fasten Wall Box Plate to wall 3XOO&$7DQG&RDLDOFDEOHVWKURXJKKROHLQDOO%R3ODWH Attach Safety Mounting Cable Corner Mounting ‡&RUQHU0RXQW%UDFNHW Attach Corner Mount Bracket Pull CAT-5 and Coaxial cables through Attach Radiator to Corner Mount Bracket Attach Safety Mounting Cable Ceiling Mounting Attach Wall Box Plate securely to ceiling Attach Tilt Arm a Attach Safety Mounting Cable Desk/Table Mounting Attach Radiator to Desk/Mic Stand DesignLALALT---140140Guide82 Microphone Stand Mounting Attach Universal Bracket to Mic Stand Determine correct angle setting Tripod Stand Mounting Attach Universal Bracket to tripod stand Attach Tilt Arm B Dual Radiator Mounting Accessories for LA-140 LA-205 LA-342 DesignLALA--140140Guide DesignLT-82Guide DesignLALA--140140Guide DesignLT-Guide82 Page Page Page Page LR-42/44 Package Contents LR-42/44 User’s Manual Table of ContentsListen Part Number Page ,56WHWKRVFRSH5HFHLYHU6SHFLÀFDWLRQV /DQ\DUG,55HFHLYHU6SHFLÀFDWLRQV LR-42 Quick Reference LR-44 Quick Reference Press to turn unit on, press and hold to turn unit off LR-42/44 Setup Instructions Determine Battery Type to be Used Place LA-364 battery pack in receiver Connect an Earphone or Headset LR-44 model only Turn Unit On Setup Additional Programming if desired Select Stereo/Mono ModeSelect a Channel and/or Program Channel Selection Method LR-42/44 Operating Instructions Position the Unit on User’s Body LR-42 LR-44 3B Auto-Seek Enabled 3A Auto-Seek Disabled Default OFFTurn the Unit On 5B Auto-Seek Enabled LED Sleep Mode5A Auto-Seek Disabled Default OFF Select Listening Channel Checking Battery Level and Current Channel Adjust Volume Level7A Checking Battery Level 7B Checking Current Channel Auto Shut-Off FeaturePowering down the unit After 10 seconds Lock Indicators Channel Lock ProcedureChannel Unlock Procedure LR-42/44 Locking Instructions While in Program Mode Program Mode OverviewEntering Program Mode LR-42/44 Programming Instructions Program Mode Functionality Diagram 1DYLJDWLQJZLWKLQWKH3URJUDP0RGH Channel Lock-Out Sub-Mode Instructions Channel Lock-Out Sub-Mode Functionality DiagramWhile in Channel Lock-Out Sub-Mode While in Squelch Adjustment Sub-Mode Squelch Adjustment Sub-Mode InstructionsSquelch Adjustment Sub-Mode Functionality Diagram Exiting Program Mode Resetting to DefaultsThere are two ways to exit the program mode Example #1 Programming ExamplesExample #2 Example #3 Want to reset the unit to factory defaultsExample #4 Want to tighten the squelch setting to setting Example #5 Channel Lock-Out Default is All Channels Available Programmable Features Detailed DescriptionsStereo Mode Default is OFF Auto-Seek Default is Off 1A NiMH Battery Pack LA-364 LR-42/44 Battery Charging InformationHow to Charge Batteries Requirements When the receiver is fully charged the green LED will light When the unit is seated correctly a red LED will lightPlace LR-42/LR-44 Receiver into a slot Place LA-364 battery pack into converted tray 114 Accessories for LR-42/44 LA-364 116 Page Page Page Page LA-350 Package Contents LA-350/351 User’s Manual Table of ContentsLA-351 Package Contents Page $6SHFLÀFDWLRQV $6SHFLÀFDWLRQV Requirements to Charge Receivers LA-350 Charging Requirements/InstructionsCharging Instructions 3A To Charge Batteries while in Receivers Install conversion trayCharging Scheme 3B To Charge Batteries separate from Receivers Verify batteries are charging Place LA-364 battery packs in converted charging slotsVerify full charge LA-350/351 Cord Tidy Rack Cord Tidy Rack 129 130 Page Page Page Page Supplementary Information Table of Contents Page Troubleshooting 7URXEOHVKRRWLQJ SupplementaryDesignLALT--14082Guide Frequently Asked Questions UHTXHQWO\$VNHG4XHVWLRQV \UHFKDUJHDEOHEDWWHULHVGRQ·WODVWYHU\ORQJK\ Compliance, Warranty and Contact Information RPSOLDQFH,QIRUPDWLRQ Listen Technologies Corporation 14912 Heritagecrest Way