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Design Guide Infrared Technology Overview System Overview Designing a System Design Tools 37 38 43 54 55 57 58 78 89 90 91 95 101 102 107 110 115 LR-42/LR-44 4-Channel IR Receivers 6SHFLÀFDWLRQV LR-42 Quick Reference Page LR-44 Quick Reference Page Setup Instructions Operating Instructions Locking Instructions Programming Instructions Programming Examples Programmable Features Detailed Descriptions %DWWHU\ &KDU
Infrared Technology Overview System Overview Designing a System Design Tools 5 6 9 21 Design Guide Guide Design Stationary Infrared Design Guide Table of Contents
Design Design Guide Guide
Design Guide Guide Design Infrared Technology Overview Infrared or “IR” technology uses infrared light to transmit audio without wires. This type of transmission is advantageous to RF transmission because it is secure, it is not susceptible to RF interference, and one receiver can be used for multiple rooms within a facility. The transmitter accepts an audio signal and then frequency modulates an RF carrier at 2.3, 2.8, 3.3 and/or 3.8MHz.
Design Design Guide Guide System Overview 7KHUH DUH WKUHH PDLQ FRPSRQHQWV RI DQ\ 6WDWLRQDU\ ,5 V\VWHP WKH WUDQVPLWWHU UDGLDWRU HPLWWHU DQG UHFHLYers. LT-82 Transmitter LA-140 Radiator 1 2 3 1 2 3 4 4 LR-42 LR-44 Single Channel System A single channel system consists of one LT-82 transmitter and one or more radiators. The diagram below shows such a system with one radiator. The radiator is powered from the power supply at the transmitter.
Design Guide Guide Design System Overview Multiple Channel System A multiple channel system consists of two to four LT-82 transmitters and one or more radiators. The diagram EHORZ VKRZV VXFK D V\VWHP ZLWK WZR UDGLDWRUV 7KH UDGLDWRUV DUH SRZHUHG IURP WKH SRZHU VXSSO\ IURP WKH ÀUVW transmitter. This power supply can supply enough power for the LT-82 and two LA-140 radiators. If you need more than two radiators, you can use the power from the other transmitters.
Design Design Guide Guide System Overview Key Concepts of Designing a Stationary IR System 1 Each LT-82 transmitter used can power two LA-140 radiators Each LT-82 transmitter used can power up to two LA-140 radiators. If you design a system that requires more radiators than the transmitters can power, you need to order additional LA-205 power supplies. Each LA-205 can power up to two LA-140 Radiators.
Design Guide Guide Design Designing a System 1 Determine the number of audio channels You will need to order one LT-82 transmitter for each audio channel. The Listen system can deliver up to four audio channels simultaneously.
Design Design Guide Guide Designing a System Horizontal Polar Pattern Single Channel System Vertical Polar Pattern Single Channel System 10
Design Guide Guide Design Designing a System It is a good idea to provide over-lapping coverage (like in a sprinkling system) of the signal whenever possible to ensure that the signal does not have drop outs. In addition, you should provide special radiator coverage for shaded areas such as under a balcony or in the front of a room where the front mounted radiators do not provide enough coverage. The following diagrams illustrate these concepts.
Design Design Guide Guide Designing a System If there is an area within a room (such as under a balcony) that is shielded from the main radiation pattern, you will need to provide additional radiator(s) to cover this area.
Design Guide Guide Design Designing a System To double the radiator power, it is possible to vertically or horizontally mount two radiators together using the /$ 'XDO 5DGLDWRU 0RXQWLQJ %UDFNHW VROG VHSDUDWHO\ 7KLV LV KLJKO\ UHFRPPHQGHG LQ ODUJHU URRPV RAD 1 RAD 2 3B Height of Radiators It is critical to mount the radiators at the proper height.
Design Design Guide Guide Designing a System 4 Determine the number of radiators required 'HWHUPLQH WKH QXPEHU RI UDGLDWRUV UHTXLUHG EDVHG RQ WKH VL]H DQG VKDSH RI WKH URRP %DVHG RQ VWHS WZR LW is recommended that you draw the room out indicating the location of each radiator in the room and cable runs from the transmitter(s) and power supplies (if any) to the radiator.
Design Guide Guide Design Designing a System 5 Complete the system layout worksheet Complete the system layout worksheet for Power and RF cable lengths, delay compensation, required number of power supplies, and height and angle of radiators. Refer to the system layout worksheet example below.
Design Design Guide Guide Designing a System 5A Cross out the LT-82 transmitters Cross out the LT-82 transmitters not required in your system. 5B Determine how many radiators will be used Determine how many radiators will be used on each radiator daisy chain by reviewing the room layout worksheet. Cross out the unused radiators on the system layout worksheet. 5C Write in the coaxial RF cable lengths for each radiator Write in the coaxial RF cable lengths for each radiator used in the spaces provided.
Design Guide Guide Design Designing a System 6 Complete the system materials worksheet Complete the system materials worksheet that determines the quantity of each part number required for your V\VWHP 8VH WKH 5RRP DQG 6\VWHP /D\RXW :RUNVKHHWV WR ÀOO LQ WKLV IRUP IRXQG LQ WKH ODVW VHFWLRQ RI WKLV JXLGH 6A Transmitters Fill in the number of transmitters required. Each transmitter includes a short piece (15 inches) of RG-58 coaxial RF cable for multiple channel installation interconnections.
Design Design Guide Guide Designing a System 6D Radiator Mounting Options Since the radiator comes with most radiator mounting options, there are only two additional choices. 1 Dual radiator mounting The LA-342 dual radiator mounting bracket allows you to mount two radiators together (vertically or horizontally). This includes short lengths of coaxial RF and CAT-5 power cables.
Design Guide Guide Design Notes 19
KEY CAT-5 RG-58 LA-140 LT-82 Room Layout Worksheet Design Guide LA-140 Design Guide LT-82 21
Design Guide Guide Design System Layout Worksheet 23
Design Guide LA-140 Design Guide LT-82 25
Design Guide Guide Design System Materials Worksheet Transmitters Description Stationary IR Transmitter Power Cord USA Part Number LT-82-01 UK LT-82-02 Euro LT-82-03 Quantity Transmitter Rack Mounting Description Universal Rack Mount Kit (Mounts two LT-82 units) Part Number LA-326 Quantity Radiators Description Stationary IR Radiator Color Grey Part Number LA-140-GY White LA-140-WH Quantity Radiator Mounting Options Description Dual Radiator Mounting Bracket Part Number LA-342 IR Radiator Floo
LT-82 User’s Manual Table of Contents 6SHFLÀFDWLRQV %ORFN 'LDJUDP Quick Reference Page Setup and Operating Instructions Accessories for LT-82 37 38 43 Design Guide LT-82 Design Guide LT-82 LT-82 Package Contents • LT-82 IR Transmitter • LA-205 Power Supply • LA-89 IR Interconnection Cable ,5 6\VWHP 'HVLJQ *XLGH DQG 8VHU·V 0DQXDO • LT-82 Quick Reference Card LT-82 IR Transmitter LA-89 IR Interconnection Cable LA-205 Power Supply /LVWHQ &RQÀJXUD
/7 6SHFLÀFDWLRQV $UFKLWHFWXUDO 6SHFLÀFDWLRQ 7KH 6WDWLRQDU\ ,5 7UDQVPLWWHU VKDOO EH FDSDEOH RI EURDGFDVWLQJ RQ IRXU PRQR RU VWHUHR FDUULHUV DQG 0+] &KDQQHO selection shall be capable of being locked. Multiple transmitters shall be capable of being daisy-chained together to transmit up to four channels simultaneously. The transmitter shall have a timer that shuts off the carriers after 30 minutes when no audio is present at the transmitter.
LT-82 Block Diagram POWER 3.5MM Stereo On Off Design Guide LT-82 Design Guide LT-82 Red LED 115/230VAC 50/60hz Universal Power Supply LA-205 (provided) CHANNEL SELECT HEADPHONE Up Volume 30VDC, 1.
LT-82 Quick Reference 7UDQVPLW /HYHO ,QGLFDWRU 6KRZV PL[HG DXGLR OHYHO 3URFHVV /(' ,QGLFDWHV DXGLR SURFHVVLQJ PRGH LV DFWLYH 6WHUHR /(' ,QGLFDWHV VWHUHR PRGH LV DFWLYH ,QSXW /HYHO ,QGLFDWRUV 6KRZV ,QSXW and Input 2 levels.
LT-82 Setup and Operating Instructions 1 Unpack the Product Design Guide LT-82 Design Guide LT-82 Remove outer packaging and plastic cover. Verify all components are present and no physical damage has occurred to the product. 2 Mount LT-82(s) in Rack (if desired) If rack mounting the transmitter(s), install the optional rack mount kit (part LA-326) according to the instructions included with the kit. Rack Mount with single unit installed. 3 Rack Mount with dual units installed.
LT-82 Setup and Operating Instructions 5 Connect LT-82 Power to Radiator(s)(if desired) Design Guide LT-82 Design Guide LT-82 The radiator(s) can be powered by either the transmitter Power Output or remotely with a power supply (LA-205) near the radiator. If powering the radiator(s) with the transmitter, connect the transmitter Power Output to the radiator Power Input with CAT-5 cable. NOTE: A maximum of two radiators can be powered by each LT-82.
LT-82 Setup and Operating Instructions 7 Select Operating Channel 7A Select the operating channel Design Guide LT-82 Design Guide LT-82 Select the operating channel (1-4). For single channel systems any channel can be used. In multi-channel systems each transmitter must be on a different channel. 'RZQ %XWWRQ Channel select buttons 8S %XWWRQ 7B RF-Off Channel Setting Information This channel does not have a carrier present however allows pass through from RF input to RF output.
LT-82 Setup and Operating Instructions 8 Connect Audio Inputs Design Guide LT-82 Design Guide LT-82 7KH /7 KDV WZR DXGLR LQSXW RSWLRQV ,QSXW DQG ,QSXW ,QSXW LV D balanced connection using either an XLR or 1/4” phono connector. Input 2 has two unbalanced mixing phono connectors. Use Input 1 if you are using a microphone or if you have a balanced connection such as from a professional audio mixer (you can also use Input 1 for unbalanced connections).
LT-82 Setup and Operating Instructions 9 Set Stereo and Process Features 9A Stereo and Process Mode Descriptions Design Guide LT-82 Design Guide LT-82 1 Stereo Mode A stereo signal can be transmitted to the receivers. Input 2 must be used if a stereo signal is desired and the stereo mode must be enabled on the transmitter. ATTENTION: If the transmitter is in stereo mode the receivers will need to be put into stereo mode. Refer to page 102 for more information.
Accessories for LT-82 $FFHVVRULHV Design Guide LT-82 Design Guide LT-82 LA-326 Universal 5DFN 0RXQWLQJ .LW Will mount up to two LT-82 units LA-112 RG-58 50 Ohm Coaxial Cable Specify length LA-391 RG-58/50 Ohm Coaxial Cable Preassembled, specify length LA-393 RJ-45/CAT-5 Preassembled, specify length LA-115 5* %1& WR %1& &RXSOHU LA-71 RJ-45 CAT-5 Connector LA-70 CAT-5 Cable Specify length LA-127 5* %1& &RQQHFWRU LA-72 RJ-45 to RJ-45 CAT-5 Coupler (Pkg.
Design Guide LT-82 Design Guide LT-82 Notes 44
Notes Design Guide LT-82 Design Guide LT-82 45
Design Guide LT-82 Design Guide LT-82 Notes 46
LA-140 User’s Manual Table of Contents 6SHFLÀFDWLRQV Quick Reference Page Setup Instructions LED Indications Mounting Your Radiator Accessories for LA-140 54 55 57 58 78 LA-140 Package Contents Design Guide LA-140 Design Guide LT-82 • LA-140 Stationary IR Radiator • IR Radiator Quick Reference Card • 25 feet RG-58 Coaxial Cable • 25 feet CAT-5 Power Cable • IR Radiator Mounting Hardware 8QLYHUVDO %UDFNHW • Tilt Arm “A” 7LOW $UP ´%µ 7LOW %ROW &RUQHU 0RXQW
/$ 6SHFLÀFDWLRQV $UFKLWHFWXUDO 6SHFLÀFDWLRQ The radiator-emitter shall have a single carrier transmitting area of no less than 10,000 ft2 (929 m2 RU JUHDWHU IRU HDFK UDGLDWRU VSHFLÀHG ZKHQ XVHG ZLWK VSHFLÀHG UHFHLYHU The radiator shall be powered via CAT-5 cabling and the RF from the transmitter shall be carried by 50 ohm coaxial cable. The radiator shall have three indicating LEDs for power, no carrier present and carrier present.
LA-140 Quick Reference Design Guide LA-140 Design Guide LT-82 1R &RQQHFWLRQ
LA-140 Setup and Operating Instructions 1 Unpack the Product Remove outer packaging and plastic cover. Verify all components are present and that no physical damage has occurred to the product. 2 Mount Radiator 2A Determining Location Generally a higher location with a clear line of sight to the area the receivers will be used in is recommended. Refer to the design guide for detailed instructions about determining the location to mount the radiator(s).
LA-140 Setup and Operating Instructions 5 Set Delay Compensation Switch 5A Single Radiator Systems The position of the delay compensation switch does not matter in single radiator systems. 5B Multiple Radiator Systems Design Guide LA-140 Design Guide LT-82 It is necessary to select the correct delay compensation switch setting for each radiator to ensure that each radiator transmits the same signal at exactly the same time in an overlapping ,multiple radiator system.
LA-140 Setup and Operating Instructions 8 Set Compatibility Switch (SW2) If using a Listen LT-82 Transmitter with the Listen LA-140 Radiator leave this switch in the “OFF” position. ,I \RX DUH XVLQJ WKH /LVWHQ /$ 5DGLDWRU ZLWK DQRWKHU PDQXIDFWXUHU·V WUDQVPLWWHU PRGXODWRU VHW WKLV switch to the “ON” position. IMPORTANT: Ensure this switch is in the “OFF” position whenever using the radiator with the Listen LT-82 Transmitter.
LA-140 – Mounting your Radiator Overview 7KHUH DUH VHYHUDO GLIIHUHQW FRQÀJXUDWLRQV WKDW WKH UDGLDWRU FDQ EH PRXQWHG LQ $OO RI WKHP H[FHSW IRU WKH ´'XDO 5DGLDWRU 0RXQWLQJ &RQÀJXUDWLRQVµ FDQ EH DFFRPSOLVKHG XVLQJ WKH PRXQWLQJ KDUGZDUH LQFOXGHG ZLWK WKH /$ ,5 5DGLDWRU .LW WKH /$ 'XDO 0RXQWLQJ %UDFNHW LV QRW LQFOXGHG ZLWK WKH NLW but is required for mounting two radiators side-by-side).
LA-140 – Mounting your Radiator Wall Box Mounting The wall box mount is a preferred mounting option for the LA-140 IR Radiator. The wall box mount allows secure mounting of the radiator as well as for allowing the necessary cables to be placed inside the wall.
LA-140 – Mounting your Radiator 4 Pull CAT-5 and Coaxial cables through (if necessary) 3XOO &$7 DQG &RD[LDO FDEOHV WKURXJK KROH LQ :DOO %R[ 3ODWH 5 Determine correct angle Determine correct angle setting to use for the radiator using the design guide, see page 13 of design guide.
LA-140 – Mounting your Radiator Hollow Wall Mounting A hollow wall installation is not as preferrable as a wall box installation but can be done without problems.
LA-140 – Mounting your Radiator 3 Attach Tilt Arm “B” $WWDFK 7LOW $UP ´%µ WR 6ZLQJ $UP RI UDGLDWRU VZLQJ DUP FRPHV DWWDFKHG WR UHDU RI UDGLDWRU XVLQJ LQFOXGHG 0RXQWLQJ Hardware Screws. Any of the seven holes in Swing Arm can be used for this.
LA-140 – Mounting your Radiator 7 Attach Safety Mounting Cable The radiator has a safety cable attached to the top of the swing arm. This cable must be attached to a secure base to prevent the radiator from falling in the event of a mounting hardware component failing. Possible injury to persons and damage to the radiator is prevented by securely attaching this cable to a base.
LA-140 – Mounting your Radiator Corner Mounting The radiator is mounted in the corner of a room with or without a wall box available for this use. A wall box must be at least four inches from the corner if using for this install.
LA-140 – Mounting your Radiator 2 Attach Corner Mount Bracket 3 Attach Tilt Arm “A” $WWDFK &RUQHU 0RXQW %UDFNHW WR :DOO %R[ 3ODWH XVLQJ LQFOXGHG Mounting Harware Screws. Use all four available holes to ensure a secure attachment.
LA-140 – Mounting your Radiator 5 Pull CAT-5 and Coaxial cables through Design Guide LA-140 Design Guide LT-82 3XOO &$7 DQG &RD[LDO FDEOHV WKURXJK KROH LQ :DOO %R[ 3ODWH LI QHFHVVDU\ 6 Determine correct angle Determine correct angle setting to use for the radiator using the design guide, see page 13 of design guide. 7 Attach Radiator to Corner Mount Bracket $WWDFK 5DGLDWRU WR &RUQHU 0RXQW %UDFNHW XVLQJ 7LOW $UP ´$µ DQG 7LOW $UP ´% µ 8VH WKH 7LOW %ROW WR IDVWHQ WKH WLOW DUPV together.
LA-140 – Mounting your Radiator 8 Attach Safety Mounting Cable The radiator has a safety cable attached to the top of the swing arm. This cable must be attached to a secure base to prevent the radiator from falling in the event of a mounting hardware component failing. Possible injury to persons and damage to the radiator is prevented by securely attaching this cable to a base. 9 Connect CAT-5 and Coaxial cables Connect CAT-5 and Coaxial cables to appropriate locations on radiator.
LA-140 – Mounting your Radiator Ceiling Mounting 'HVFULSWLRQ 5DGLDWRU LV PRXQWHG RQ WKH FHLOLQJ ZLWK RU ZLWKRXW D ZDOO ER[ DYDLODEOH IRU WKLV XVH 3LHFHV 8VHG :DOO %R[ 3ODWH • Hollow Wall Mounting Screws (if attaching to wall box) or Hollow Wall Anchors with Screws (if attached to hollow wall) • Tilt Arm “A” 7LOW $UP ´%µ 7LOW %ROW • Mounting Hardware Screws Anchors with or :DOO %R[ 3ODWH Design Guide LA-140 Design Guide LT-82 7LOW %ROW Hollow Wall Anchors with Screws Tilt Arm “A” 7LOW $UP ´%µ
LA-140 – Mounting your Radiator 2 Attach Tilt Arm “A” $WWDFK 7LOW $UP ´$µ WR :DOO %R[ 3ODWH $WWDFK 7LOW $UP ´$µ LQ VXFK D PDQQHU WKDW LW VLWV DFURVV :DOO %R[ 3ODWH XVLQJ Mounting Hardware Screws, not up and down on plate. 3 Attach Tilt Arm “B” 4 Design Guide LA-140 Design Guide LT-82 $WWDFK 7LOW $UP ´%µ WR 6ZLQJ $UP RI UDGLDWRU VZLQJ DUP FRPHV DWWDFKHG WR UHDU RI UDGLDWRU XVLQJ LQFOXGHG Mounting Hardware Screws.
LA-140 – Mounting your Radiator 6 Attach Radiator to Wall Box Plate using Tilt Arm “A” and Tilt Arm “B” $WWDFK 5DGLDWRU WR :DOO %R[ 3ODWH XVLQJ 7LOW $UP ´$µ DQG 7LOW $UP ´% µ 8VH WKH 7LOW %ROW WR IDVWHQ WKH WLOW DUPV WRJHWKHU Design Guide LA-140 Design Guide LT-82 ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the correct angle is selected before fully tightening Tilt Bolt. 7 Attach Safety Mounting Cable The radiator has a safety cable attached to the top of the swing arm.
LA-140 – Mounting your Radiator Desk/Table Mounting 5DGLDWRU LV PRXQWHG WR D VXSSRUW EUDFNHW WKDW FDQ EH VHW RQ DQ\ ÁDW VXUIDFH 7KLV LV D ÁH[LEOH DQG non-permanent mounting strategy.
LA-140 – Mounting your Radiator 3 Determine correct angle Determine correct angle setting to use for the radiator using the design guide, see page 13 of design guide. 4 Attach Radiator to Desk/Mic Stand $WWDFK 5DGLDWRU WR 'HVN 0LF 6WDQG XVLQJ 7LOW $UP ´$µ DQG 7LOW $UP ´% µ 8VH WKH 7LOW %ROW WR IDVWHQ WKH WLOW DUPV WRJHWKHU Design Guide LA-140 Design Guide LT-82 ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the correct angle is selected before fully tightening Tilt Bolt.
LA-140 – Mounting your Radiator Microphone Stand Mounting Radiator is mounted on a standard microphone stand.
LA-140 – Mounting your Radiator 4 Determine correct angle setting Determine correct angle setting to use for the radiator using the design guide, see page 13 of design guide. 5 Attach Radiator to Desk/Mic Stand $WWDFK 5DGLDWRU WR 'HVN 0LF 6WDQG XVLQJ 7LOW $UP ´$µ DQG 7LOW $UP ´% µ 8VH WKH 7LOW %ROW WR IDVWHQ WKH WLOW arms together.
LA-140 – Mounting your Radiator Tripod Stand Mounting Radiator is mounted on a tripod stand. If Listen part number LA-337 is used the radiator can be mounted up to nine feet high.
LA-140 – Mounting your Radiator 3 Attach Tilt Arm “B” Design Guide LA-140 Design Guide LT-82 $WWDFK 7LOW $UP ´%µ WR 6ZLQJ $UP RI UDGLDWRU VZLQJ DUP FRPHV DWWDFKHG WR UHDU RI UDGLDWRU XVLQJ LQFOXGHG PRXQWLQJ hardware screws. The bottom hole in Swing Arm must be used for this install. 4 Determine correct angle Determine correct angle setting to use for the radiator using the design guide, see page 13 of design guide.
LA-140 – Mounting your Radiator Dual Radiator Mounting It is possible to mount two Listen LA-140 Radiators either side by side or on top of each other using the /$ 'XDO 5DGLDWRU 0RXQWLQJ %UDFNHW VROG VHSDUDWHO\ 7KH PRXQWLQJ VWUDWHJ\ LV YHU\ VLPLODU WR DOO RI the previous scenerios except you will be working with two radiators connected together. The instructions for connecting two radiators together with the LA-342 bracket are included with the bracket.
Accessories for LA-140 $FFHVVRULHV LA-205 IR Extended Power Supply (powers two LA-140 radiators) Design Guide LA-140 Design Guide LT-82 1RWH
Notes Design Guide LA-140 Design Guide LT-82 79
Design Guide LA-140 Design Guide LT-82 Notes 80
LR-42/44 User’s Manual Table of Contents LR-42/LR-44 4-Channel IR Receivers 6SHFLÀFDWLRQV LR-42 Quick Reference Page LR-44 Quick Reference Page Setup Instructions Operating Instructions Locking Instructions Programming Instructions Programming Examples Programmable Features Detailed Descriptions %DWWHU\ &KDUJLQJ ,QIRUPDWLRQ Accessories for LR-42/LR-44 89 90 91 95 101 102 107 110 115 LR-42/44 Package Contents • LR-42 IR Stethoscope 4-Channel Receiver (or)
/5 ,5 6WHWKRVFRSH 5HFHLYHU 6SHFLÀFDWLRQV $UFKLWHFWXUDO 6SHFLÀFDWLRQ The IR stethoscope 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 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.
/5 /DQ\DUG ,5 5HFHLYHU 6SHFLÀFDWLRQV $UFKLWHFWXUDO 6SHFLÀFDWLRQ 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.
LR-42 Quick Reference 6WHWKR $UPV /5 PRGHO RQO\ Speakers located in ends of stetho arms, place in ears to listen to audio Design Guide LA-140 LR-42/44 Design Guide LT-82 &KDQQHO ,QGLFDWRU /('V Displays which channel the unit is currently tuned to. Also can display battery level, etc.
LR-44 Quick Reference Design Guide LA-140 LR-42/44 Design Guide LT-82 /DQ\DUG /5 PRGHO RQO\ Holds receiver in place below chin of wearer &KDQQHO ,QGLFDWRU /('V Displays which channel the unit is currently tuned to. Also can display battery level, etc.
LR-42/44 Setup Instructions 1 Unpack the Product Remove outer packaging and plastic cover. Verify all components are present and that no physical damage has occurred to the product. 2 Determine Battery Type to be Used 2A $ONDOLQH %DWWHULHV ,I XVLQJ DONDOLQH EDWWHULHV LQVWDOO WKHP LQ DONDOLQH EDWWHU\ FRPSDUWPHQW DWWDFKHG WR UHDU of unit using the following process (purchase Listen part number LA-363). 1 Remove alkaline battery compartment Press down on compartment and push towards the bottom of unit.
LR-42/44 Setup Instructions 2B 5HFKDUJHDEOH 1L0+ EDWWHULHV 7R XVH UHFKDUJDEOH 1L0+ EDWWHULHV LQ WKH UHFHLYHU \RX ZLOO QHHG WR SXUFKDVH DQ 1L0+ UHFKDUJHDEOH EDWWHU\ SDFN /LVWHQ SDUW QXPEHU /$ IMPORTANT: Do not install AAA NiMH batteries in included alkaline battery pack because the batteries will not charge in this pack, only use a Listen provided sealed battery pack (LA-364) for battery charging.
LR-42/44 Setup Instructions 3 Connect an Earphone or Headset (LR-44 model only) An earphone or headset will connect to the jack on the bottom of the unit. Either mono or stereo connectors may be used with Listen receivers. Make sure to push the connector all the way into the jack. 1 1 3 4 Design Guide LA-140 LR-42/44 Design Guide LT-82 4 2 Turn Unit On Turn the unit on by pressing either button on the front of the unit.
LR-42/44 Setup Instructions 5 Select a Channel and/or Program Channel Selection Method The Select button is used to change the channel. Press the button once to change the channel. The unit will either seek or scroll through the channels depending upon which channel selection method you have enabled. See below for description of possible channel selection methods. 5A Upon Power up When set to factory defaults the unit will turn on to the last channel is was tuned to upon power up.
LR-42/44 Operating Instructions 127( 7KH IROORZLQJ RSHUDWLQJ LQVWUXFWLRQV EULHÁ\ GHVFULEH KRZ D XQLW RSHUDWHV EDVHG RQ ZKLFK SURJUDPPLQJ IHDWXUHV have been enabled/disabled, with the factory default settings highlighted. See page 102 for detailed information about programming and operating units using non-default settings. 1 Connect an Earphone or Headset (LR-44 Model Only) An earphone or headset will connect to the jack on the bottom of the unit.
LR-42/44 Operating Instructions 2A LR-42 Position the receiver so the stethoscope arm tips rest in the ear holding the unit below the chin of the user. 2B LR-44 Design Guide LA-140 LR-42/44 Design Guide LT-82 Position the lanyard around the neck holding the unit below the chin of the user.
LR-42/44 Operating Instructions 3 Turn the Unit On Turn on the unit by pressing either button on the front of the receiver. 1 2 3 1 2 3 4 ATTENTION 1: The LR-44 model must have a headset connected to the unit to turn on and remain on for longer than ten seconds. ATTENTION 2: If using a new LA-364 NiMH battery pack the batteries may need to be put through one charge cycle before they will turn the unit on.
LR-42/44 Operating Instructions 4 LED Sleep Mode The receiver will shut off the channel indicator LEDs after a period of 10 seconds passes without any buttons being pressed. The receiver will still produce audio and the volume can still be adjusted, only the LEDs shut down. It will be necessary to “wake up” the receiver by tapping either the PWR or Select button before doing many of the operating tasks described in the next sections.
LR-42/44 Operating Instructions 6 Adjust Volume Level Use the control dial on the top of the unit to adjust the volume to a comfortable level. 2 1 7 3 4 Checking Battery Level and Current Channel 7A Checking Battery Level 1 Tapping the power button will display the battery level on the channel indicator LEDs. 2 3 1 2 3 4 2 When a battery check is initiated all four LEDs will turn on. Then the LEDs will ramp down to the current battery level.
LR-42/44 Operating Instructions 7B Checking Current Channel The channel the unit is currently on is represented by the corresponding LED in the channel indicator LEDs being lit (unless unit is in LED sleep mode). To check which channel the unit is on without changing the current channel while the unit is in LED sleep mode, press either the PWR or Select button once. This will turn the channel indicator LEDs back on for 10 seconds.
LR-42/44 Locking Instructions Locking the Receiver on One Channel The unit can be electronically locked on one channel so that it will not change channel even if the Select button is pressed. It is recommended to lock the receivers on the channel that is being used in systems that do not require the user to change channels (single channel systems). Channel Lock Procedure The unit can be electronically locked on the channel it is currently on using the following process.
LR-42/44 Programming Instructions Program Mode Overview 7KH IROORZLQJ IHDWXUHV FDQ EH SURJUDPPHG ZLWKLQ WKH SURJUDP PRGH 6WHUHR 2Q 2II &KDQQHO /RFN 2XW Auto Seek and Squelch. The following sections outline the procedures required to enter the program mode, modify the programmable features and exit the program mode. There are also several examples of how to use the program mode to change the settings of the receiver.
LR-42/44 Programming Instructions Program Mode Functionality Diagram Use this chart to help with navigating through, and adjusting the features within, the program mode. 3URJUDPPDEOH Feature 1 2 3 Stereo On/Off Channel Lock-Out 1DYLJDWLQJ ZLWKLQ WKH 3URJUDP 0RGH 1 1 Auto-Seek 1 Squelch 5 No Function 6 Reset to Defaults 1 1 1 7 3UHVVLQJ WKH 3RZHU %XWWRQ Exit Program Mode 1 2 3 Advances to Feature 2 Toggles Stereo On/Off.
LR-42/44 Programming Instructions Channel Lock-Out “Sub-Mode” Instructions While in Channel Lock-Out “Sub-Mode” 1 The channels that would be available are represented by the corresponding channel indicator LED being on and the channels that would be “locked out” are represented by the channel indicator LED being off. 2 Press the Select button to advance to the next channel(s) active combination.
LR-42/44 Programming Instructions Squelch Adjustment “Sub-Mode” Instructions While in Squelch Adjustment “Sub-Mode” 1 There are 16 available squelch settings. The 16 settings are represented by binary code (refer to the chart below). 2 Press the Select button to advance to the next possible squelch setting. 3 Press the Power button to save the selected squelch setting, and return to regular program mode.
LR-42/44 Programming Instructions Resetting to Defaults 1 It is possible to reset the unit to factory default settings and the unit must be in the program mode to be reset. 2 While in program mode, select the “Reset to Defaults” function and press the power button.
Programming Examples Example #1 I want to turn on/off the Stereo Mode function and then exit program mode 1 Enter Program Mode (see page 102) 2 :KHQ SURJUDP PRGH LV HQWHUHG WKH ÀUVW IXQFWLRQ LV DFWLYH DQG WKH /('·V ZLOO VKRZ 1 2 3 Using the functionality chart on a previous page note that this is the Stereo On/Off Function. 3 Note that the channel 4 LED indicates whether or not this function is on/off. 4 Press the power button to turn Stereo Mode on/off. 5 Exit Program Mode.
Programming Examples Example #3 I want to lock-out channels 2 and 3 using the Channel Lock-Out Function. 1 Enter Program Mode. 2 :KHQ SURJUDP PRGH LV HQWHUHG WKH ÀUVW IXQFWLRQ LV DFWLYH DQG WKH /('·V ZLOO VKRZ 2 1 3 Using the functionality chart on a previous page note that this is the Stereo On/Off Function. 3 3UHVV WKH 6HOHFW EXWWRQ RQFH VR WKH /('·V VKRZ 2 1 3 Note that this is the Channel Lock-Out function. 4 Press the Power button to enter the Channel Lock-Out “Sub-Mode”.
Programming Examples Example #5 I want to tighten the squelch setting to setting 10. 1 Enter Program Mode. 2 :KHQ SURJUDP PRGH LV HQWHUHG WKH ÀUVW IXQFWLRQ LV DFWLYH DQG WKH /('·V ZLOO VKRZ 2 1 3 Using the functionality chart on a previous page note that this is the Stereo On/Off Function. 3 3UHVV WKH 6HOHFW EXWWRQ WKUHH WLPHV VR WKH /('·V VKRZ 2 1 3 Note that this is the Squelch Adjustment Function. 4 Press the Power button to enter the Squelch Adjustment “Sub-Mode”.
Programmable Features Detailed Descriptions Stereo Mode (Default is OFF) Stereo Mode Function This function must be set to match the type of signal that the receiver is receiving. If the receiver is receiving a mono signal this function must be OFF. If the receiver is receiving a stereo signal this function must be ON. When to enable Stereo Mode Stereo Mode must be enabled if the receiver is receiving a stereo signal from the transmitter.
LR-42/44 Battery Charging Information 1 Requirements 1A NiMH Battery Pack (LA-364) It is not possible to charge batteries in the alkaline battery pack that comes with the unit. The LA-364 NiMH rechargeable battery pack must be used. 1B IR 8-Unit Charging/Storage Station The only way to charge the LA-364 battery packs is by inserting them into the LA-350 Charging Station. The battery packs can be charged while installed on the receiver or they can be charged while separate from the receiver.
LR-42/44 Battery Charging Information 2 Place LR-42/LR-44 Receiver into a slot Place LR-42/LR-44 Receiver into a slot on the LA-350 case. Ensure that the LA-350 charging station has power to it. 1 3 2 3 4 When the unit is seated correctly a red LED will light Design Guide LA-140 LR-42/44 Design Guide LT-82 When the unit is seated correctly a red LED will light up on the LA-350 charging station adjacent to the charging slot indicating charging has begun.
LR-42/44 Battery Charging Information 2A Charging LA-364 Battery Pack Separate from the Receiver 1 Install Battery Pack Conversion Plates to charging tray ,QVWDOO %DWWHU\ 3DFN &RQYHUVLRQ 3ODWH WR FKDUJLQJ WUD\ RI /$ FRQYHUVLRQ SODWHV included with LA-350). 2 Place LA-364 battery pack into converted tray Place LA-364 battery pack into converted tray of LA-350. Ensure that the LA-350 charging station has power to it.
LR-42/44 Battery Charging Information 4 When the battery pack is fully charged the red LED will turn off When the battery pack is fully charged the red LED will turn off and a green LED will light up to indicate battery pack is fully charged. The green LED will stay lit until the battery pack is removed from the charging station. Design Guide LA-140 LR-42/44 Design Guide LT-82 IMPORTANT: When not using your LR-42/LR-44 Receiver it is recommended to keep the receiver on the charging station.
Accessories for LR-42/44 $FFHVVRULHV LA-152 LA-364 LA-150 IR Alkaline battery compartment 1,0+ 5HFKDUJHDEOH %DWWHU\ 3DFN Replacement Lanyard for LR-44 included with receiver requires LA-350 Charging Station LA-351 LA-350 LA-161 8-Unit IR Receiver 8-Unit IR Receiver Storage Station Charging/Storage Station LA-151 6LQJOH (DU %XG Replacement Ear Tips (Pkg.
Design Guide LA-140 LR-42/44 Design Guide LT-82 Notes 116
LA-350/351 User’s Manual Table of Contents /$ 6SHFLÀFDWLRQV DQG )HDWXUHV /$ 6SHFLÀFDWLRQV DQG )HDWXUHV LA-350 Charging Requirements/Instructions Cord Tidy Rack 121 124 LA-350 Package Contents • LA-350 Charging/Storage Station • LA-204 Power Supply %DWWHU\ 3DFN &RQYHUVLRQ 7UD\V • Cord Tidy Rack • LA-350 Quick Reference Card LA-350 %DWWHU\ 3DFN &RQYHUVLRQ 7UD\V LA-204 LA-351 Package Contents • LA-351 Storage Station • Cord Tidy Rack LA-351 Design
/$ 6SHFLÀFDWLRQV Features • Can charge or store up to eight LR-42 and/or LR-44 receivers at one time. (DV\ WR LGHQWLI\ FKDUJLQJ *UHHQ /(' IXOO\ FKDUJHG XQLWV 5HG /(' FKDUJLQJ LQ SURJUHVV • Pockets grab and hold receivers so they will not fall out. &KDUJLQJ 6WRUDJH 6WDWLRQ FDQ EH PRXQWHG RQ D ÁDW VXUIDFH RU RQ D ZDOO • Can charge battery packs while they are attached to the receiver or while they are separate from the receiver (by use of included conversion tray).
/$ 6SHFLÀFDWLRQV Features • Can store up to eight LR-42 and/or LR-44 receivers at one time. • Pockets grab and hold receivers so they will not fall out. 6WRUDJH 6WDWLRQ FDQ EH PRXQWHG RQ D ÁDW VXUIDFH RU RQ D ZDOO • Lanyard cords are stored without tangling with use of Cord Tidy Rack. Specifications LA-351 Compliance Safety Compliance FCC, Industry Canada, CE, RoHS Controls User Controls None Power Electrical None Dimensions (H x W x D) 1.50 x 13.60 x 5.40 in.
LA-350 Charging Requirements/Instructions Requirements to Charge Receivers 1 Requirements to Charge Receivers To charge Listen LA-42 or LR-44 IR Receiver batteries you must have an LA-364 Rechargeable %DWWHU\ 3DFN IRU HDFK UHFHLYHU 7KH /$ ZLOO QRW FKDUJH $$$ 1L0+ EDWWHULHV SODFHG LQVLGH the alkaline battery pack that comes with the receiver. The LA-364 battery packs can be charged while attached to the receiver or they can be charged separate from the receiver.
LA-350 Charging Requirements/Instructions 3 Charging Scheme 3A To Charge Batteries while in Receivers 1 Place receivers in charging slots Place receivers in charging slots. It may be necessary to press down on the units to ensure that they are touching the charging contacts. 1 3B 2 Install conversion tray Install conversion tray in slots.
LA-350 Charging Requirements/Instructions 2 Place LA-364 battery packs in converted charging slots Place LA-364 battery packs in converted charging slots. 4 Verify batteries are charging Verify batteries are charging. When units begin to charge a red LED will come on near the charging slot. This LED will stay lit until the receivers are fully charged. 5 Verify full charge Verify full charge. When the units are fully charged a green LED will come on near the charging slot.
LA-350/351 Cord Tidy Rack The Cord Tidy Rack The Cord Tidy Rack can be used, if desired, to help with organizing the lanyard cords of the LR-44 receiver during charging or storage. Insert the tidy rack into the holes on top of the station to use.
Notes Design Guide LA-140 LA-350/351 Design Guide LT-82 129
Design Guide LA-140 LA-350/351 Design Guide LT-82 Notes 130
Supplementary Information Table of Contents Troubleshooting Frequently Asked Questions Compliance Information Warranty Contacting Listen 133 135 137 137 137 Design Guide LA-140 Supplementary Design Guide LT-82
Troubleshooting 7URXEOHVKRRWLQJ I believe my radiator has power but none of the LEDs on the front are on. 6: KDV EHHQ WXUQHG 2)) 7XUQ WKLV VZLWFK WR WKH 21 SRVLWLRQ IRU YHULÀFDWLRQ RI SRZHU DQG FDUULHU My radiator is not radiating a signal. If there is no audio at the transmitter for 30 minutes, the radiator(s) will stop radiating to conserve the life of the radiator diodes. When the audio returns, the radiators will return to normal operation.
Troubleshooting 7URXEOHVKRRWLQJ I cannot get my receiver to scroll to the channel I want to use. There are two reasons why the receiver would not scroll to the channel you want the unit to be on. 7KH ÀUVW LV WKDW WKH XQLW LV LQ ´$XWR 6HHNµ PRGH DQG LV QRW ÀQGLQJ D VLJQDO RQ WKH FKDQQHO \RX DUH trying to tune the unit to. See page 102 for more information about Auto-Seek mode. The second is that the unit is programmed to not tune to the channel you are trying to tune it to.
Frequently Asked Questions )UHTXHQWO\ $VNHG 4XHVWLRQV radiators can an LT-82 power? Q How many Up to two radiators can be powered using an LT-82. You must use an external power A supply (LA-205) for more radiators. radiators can an LA-205 power? Q How many Up to two radiators can be powered using an LA-205 external power supply. A do the LEDs on the front of my radiator tell me? Q What Refer to page 57 for detailed information about the LED indicators on the front of the LA-140 Radiator.
Frequently Asked Questions )UHTXHQWO\ $VNHG 4XHVWLRQV Q ,to ZDQW WR RFFDVLRQDOO\ WXUQ RII RQH RU PRUH FKDQQHOV LQ D PXOWL FKDQQHO V\VWHP EXW , GRQ·W ZDQW WR KDYH rewire the system every time I do this. Is this possible? The transmitter should be placed on channel “--”. This does not add a channel to the A Yes. system in your daisy-chain, however allows other channels to pass through. See page 40 for more information.
Compliance, Warranty and Contact Information &RPSOLDQFH ,QIRUPDWLRQ The following compliance information applies to the LT-82, LA-140-GY, LA-140-WH, LR-42, LR-44 and LA-350. 7KLV GHYLFH FRPSOLHV ZLWK 3DUW RI WKH )&& 5XOHV 2SHUDWLRQ LV VXEMHFW WR WKH IROORZLQJ WZR FRQGLWLRQV 7KLV device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Listen Technologies Corporation 14912 Heritagecrest Way %OXIIGDOH 8WDK 8 6 $ +1.801.233.8992 +1.800.330.0891 North America +1.801.233.8995 fax www.listentech.
