Listen Technologies Stereo Receiver LA 350 User Manual

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Dea r Va lued C ustomer,

Tha nk you for c hoosing Listen! All of us a t Listen a re dedic a ted to provide you

with the highest qua lity produc ts a va ila ble. We ta ke grea t pride in their

outsta nding performa nc e bec a use we c a re tha t you a re c ompletely

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sta nda rds a nd ba c k them with a limited lifetime gua ra ntee. We sta nd rea dy

to a nswer a ny questions you might ha ve during insta lla tion or in the opera tion

of our produc ts. Should you experienc e a ny problems wha tsoever with your

Listen produc ts, we a re rea dy to help you in a ny wa y we c a n with prompt,

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ha ve a ny c omments on how we might improve our produc ts or our

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+1.801.233.8992

+1.800.330.0891 North Americ a

+1.801.233.8995 Fa x

support@listentec h.c om

www.listentec h.c om

Tha nk you a nd enjoy your listening experienc e!

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Russell G entner a nd the Listen Tea m

• In the few insta nc es where repa irs were needed, 99% of a ll c lients indic a ted tha t they were ha ppy

with repa ir turn-a round-times a nd 85% of the time, c lients were without their produc t for less tha n

10 da ys!

• Overa ll c lient sa tisfa c tion of working with Listen wa s ra ted 4.8 out of 5.

• “Plea se c ontinue with your exc ellent a ttitude towa rd c ustomer sa tisfa c tion. You guys a re grea t!”

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• “You sta nd behind your produc t wonderfully.”

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Stationary Infrared Table of Contents

Design G uide

Infra red Tec hnology Overview

System Overview

Designing a System

Design Tools

LT-82 Sta tiona ry IR Tra nsmitter

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Quic k Referenc e Pa ge

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Setup a nd Opera ting Instruc tions

Ac c essories for LT-82

LA-140 IR Ra dia tor

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Quic k Referenc e Pa ge

Setup Instruc tions

LED Indic a tions

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Mounting your Ra dia tor

Ac c essories for LA-140

LR-42/LR-44 4-C ha nnel IR Rec eivers

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LR-42 Quic k Referenc e Pa ge

LR-44 Quic k Referenc e Pa ge

Setup Instruc tions

Opera ting Instruc tions

Loc king Instruc tions

101

102

107

110

ꢊꢊꢊ

115

Progra mming Instruc tions

Progra mming Exa mples

Progra mma ble Fea tures Deta iled Desc riptions

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Ac c essories for LR-42/LR-44

LA-350/LA-351 8-Unit IR Rec eiver Stora ge/C ha rging C a ses

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125

128

LA-350 C ha rging Requirements/Instruc tions

C ord Tidy Ra c k

Supplementa ry Informa tion

Troubleshooting

137

139

141

Frequently Asked Questions

C omplia nc e Informa tion

Wa rra nty

C onta c ting Listen

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Stationary Infrared Design Guide Table of Contents

Infra red Tec hnology Overview

System Overview

Designing a System

Design Tools

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Infrared Tec hnology Overview

Infra red or “IR” tec hnology uses infra red light to tra nsmit a udio without wires. This type of tra nsmission is

a dva nta geous to RF tra nsmission bec a use it is sec ure, it is not susc eptible to RF interferenc e, a nd one rec eiver

c a n be used for multiple rooms within a fa c ility. The tra nsmitter a c c epts a n a udio signa l a nd then frequenc y

modula tes a n RF c a rrier a t 2.3, 2.8, 3.3 a nd/or 3.8MHz. This c a rrier a long with DC power (to power the

ra dia tor) is supplied to the ra dia tor via c a bles. The c a rriers a re then ra dia ted into the room using IR emitter

diodes. This is the sa me tec hnology used by the remote c ontrol of your TV set. A rec eiver then rec eives the IR

light a nd demodula tes the c a rrier.

Ra dia tor

Audio Sourc e

Rec eiver

IR Tra nsmitter

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a fa c ility so users will not ha ve drop outs of the IR signa l. This design guide will help you do this.

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a c hieve grea ter c overa ge. For exa mple, when emitting in a very la rge room (like a n exhibit ha ll) you will

notic e tha t you need to point the rec eiver direc tly a t the ra dia tor to pic k up the signa l. However, when

the ra dia tor is pla c ed in a sma ller room (for exa mple 50 ft²/14.6 m²squa re) with white wa lls you will

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direc tions, inc rea sing c overa ge.

• Listen systems use higher modula tion frequenc ies tha t ma ke the system less susc eptible to light

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interferenc e from sourc es tha t c rea te IR light suc h a s sunlight a nd pla sma displa ys.

• Listen produc ts a re c ompa tible with other ma nufa c turers who use the sa me modula tion frequenc ies

(2.3, 2.8, 3.3, 3.8 MHz).

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System Overview

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ers.

LT-82 Tra nsmitter

LA-140 Ra dia tor

LR-42

LR-44

Single Channel System

A single c ha nnel system c onsists of one LT-82 tra nsmitter a nd one or more ra dia tors. The dia gra m below shows

suc h a system with one ra dia tor. The ra dia tor is powered from the power supply a t the tra nsmitter. This power

supply c a n supply enough power for the LT-82 a nd up to two LA-140 ra dia tors. If you need more tha n two

ra dia tors, you will need more power supplies. This is disc ussed la ter in this doc ument. Power is supplied from

sta nda rd C AT-5 c a ble while RF from the tra nsmitter is delivered using 50-ohm RG -58 c oa xia l c a ble. The ra dia tor

is supplied with 25 feet (7.6 meters) of C AT-5 a nd RG -58 c oa xia l c a ble.

LT-82 Stationary IR Transmitter

LA-140 IR Radiator

LR-42 IR Stetho Receiver

Power – CAT-5 Cable

RF – RG-58 50 ohm Cable

Mounting hardware for

radiator included with

radiator

LR-44 IR Lanyard Receiver

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System Overview

Multiple Channel System

A multiple c ha nnel system c onsists of two to four LT-82 tra nsmitters a nd one or more ra dia tors. The dia gra m

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tra nsmitter. This power supply c a n supply enough power for the LT-82 a nd two LA-140 ra dia tors. If you need

more tha n two ra dia tors, you c a n use the power from the other tra nsmitters. In this exa mple, the four

tra nsmitter power supplies c a n supply enough power for up to eight LA-140 ra dia tors. This is disc ussed la ter in

this doc ument. Power issupplied from sta nda rd C AT-5 c a ble while RF from the tra nsmitter is delivered using

50-ohm RG -58 c oa xia l c a ble. Ea c h ra dia tor is supplied with 25 feet (7.6 meters) of C AT-5 a nd RG -58 c oa xia l

c a ble.

Up to 100 LA-140 radiators can be daisy chained

together (using RG-58 cable) to provide suﬃcient

IR power for most applications

Up to four LT-82 transmitters can

be daisy chained together (using

LA-140 IR Radiator

RG-58 cable) to create a

multi-channel system

Power – CAT-5 Cable

RF – RG-58 50 ohm Cable

LR-42 IR Stetho Receiver

LT-82 Stationary IR Transmitter

RF – RG-58 50 ohm Cable

Power – CAT-5 Cable

LA -89 RG-58 Multi-carrier

Interconnection Cable (included)

LT-82 Stationary IR Transmitter

LR-44 IR Lanyard Receiver

LA-140 IR Radiator

Radiator Power: Radiators can be

powered from the LT-82 (up to two

radiators) or an additional power supply

(LA-205) can power up to two radiators

Radiator RF: RF from the last LT-82 must be

daisy chained from radiator to radiator

LT-82 Stationary IR Transmitter

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System Overview

Key Concepts of Designing a Stationary IR System

Each LT-82 transmitter used can power two LA-140 radiators

Ea c h LT-82 tra nsmitter used c a n power up to two LA-140 ra dia tors. If you design a system tha t requires more

ra dia tors tha n the tra nsmitters c a n power, you need to order a dditiona l LA-205 power supplies. Ea c h LA-205

c a n power up to two LA-140 Ra dia tors.

Up to four LT-82 transmitters can be interconnected to create up to a four channel system

Up to four LT-82 tra nsmitters c a n be interc onnec ted to c rea te up to a four c ha nnel system. For the system,

there a re two RF outputs provided for c onnec tion to the ra dia tors. Ea c h of these two outputs is referred to a s

the “Ra dia tor Da isy C ha in.” RG -58 c oa xia l c a ble is used to interc onnec t the RF in the ra dia tor da isy c ha in. You

c a n c onnec t a s ma ny ra dia tors in the da isy c ha in a s you need.

NOTE: Adding additional transmitters will dec rease radiator c overage.

Each radiator requires one RF (RG-58 coax) connection and one power (CAT-5) connection

Ea c h ra dia tor requires one RF (RG -58 c oa x) c onnec tion a nd one power (C AT-5) c onnec tion. The RF

c onnec tion c a n c ome from a tra nsmitter or from a nother ra dia tor. The power c onnec tion c a n c ome from

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Listen has provided mounting hardware for most LA-140 mounting situations

To ma ke it ea sy for you to design, spec ify a nd insta ll a system, Listen ha s provided mounting ha rdwa re for

most mounting situa tions inc luding wa ll, c eiling, c orner, desk, tripod a nd mic sta nds. To double the ra dia tion

power you c a n vertic a lly or horizonta lly mount two ra dia tors together using the LA-342 dua l ra dia tor mounting

bra c kets. This inc ludes c oa xia l RF a nd C AT-5 power c a bles.

It is possible that the RF signal arrives to diﬀerent radiators at diﬀerent times

Due to the higher modula tion frequenc ies, it is possible tha t the RF signa l a rrives to different ra dia tors a t

different times. This dela y c a n c a use the IR c a rriers to a dd “out of pha se” a nd c a use the signa l to drop

out. To solve this problem, Listen ha s provided a dela y c ompensa tion a djustment on ea c h ra dia tor.

This design guide will help you c a lc ula te the setting for this a djustment.

As the number of channels increases, the eﬀective radiated coverage declines

As the number of c ha nnels inc rea ses, the effec tive ra dia ted c overa ge dec lines. For exa mple, a two

c ha nnel system will ha ve ha lf the c overa ge of a single c ha nnel system. If is importa nt to inc rea se the

number of ra dia tors for multiple c ha nnel systems.

The coverage patterns provide coverage of the system assuming no reﬂection

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a ddition, the ra dia tor ha s been under-ra ted to a c c ount for system degra da tion a s the IR emitting LEDs

a ge over time. It is importa nt to design the system ba sed on these c overa ge pa tterns a nd not by tria l

a nd error. The rea son for this is tha t the c overa ge pa ttern will be stronger when the ra dia tor is new.

A system tha t ha s a dequa te c overa ge toda y ma y not ha ve a dequa te c overa ge in the future if not

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The maximum length of CAT-5 power cable

C AT-5 power c a ble should never exc eed 1000 feet from the sourc e power supply.

The maximum length of coaxial RF cable

C oa xia l RF signa l c a ble should never exc eed 1000 feet from the sourc e tra nsmitter.

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Designing a System

Determine the number of audio channels

You will need to order one LT-82 tra nsmitter for ea c h a udio c ha nnel. The Listen system c a n deliver up to four

a udio c ha nnels simulta neously.

Determine the room size and shape

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Complete the room layout worksheet

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tra nsmitters, power supplies a nd ra dia tors using the worksheet key. The following fa c tors will determine the

c overa ge of the room.

Number of radiators and location

Exc ept in sma ll rooms it is rec ommended tha t a t lea st two ra dia tors be used to ensure good c overa ge a nd

minima l sha ding. Listen ra dia tors (when used with Listen rec eivers) will c over a pproxima tely 10,000 ft²

(929 m²) for one c ha nnel a s indic a ted in the dia gra m below (note the c overa ge dec rea ses a s the number

of c ha nnels goes up). For two c ha nnels, one ra dia tor will c over 5,000 ft²(465 m²) a nd for four c ha nnels, one

ra dia tor will c over 2,500 ft²(232 m²).

Horizontal Plane Footprint Pattern (feet)

Coverage pattern

shown in feet

4 TX

2 TX

1 TX

100

110

120

130

140

150

You should use the a bove c overa ge pa ttern to determine c overa ge of ea c h ra dia tor in your system, not

by tria l a nd error. The ra dia tor will be stronger when new a nd therefore is under-ra ted by 40 perc ent a nd

the c overa ge pa ttern a bove a c c ounts for this. 40 perc ent degra da tion will oc c ur a fter a pproxima tely 8,000

opera ting hours.

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Designing a System

Horizontal Polar Pattern

Single Channel System

Vertical Polar Pattern

Single Channel System

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Designing a System

It is a good idea to provide over-la pping c overa ge (like in a sprinkling system) of the signa l whenever possible to ensure tha t

the signa l does not ha ve drop outs. In a ddition, you should provide spec ia l ra dia tor c overa ge for sha ded a rea s suc h a s under

a ba lc ony or in the front of a room where the front mounted ra dia tors do not provide enough c overa ge.

The following dia gra ms illustra te these c onc epts.

In this example a total of four radiators, one in each corner, ensures good coverage at all locations and orientations.

Except in small rooms, it is recommended that at least two radiators are used to prevent shading of the IR signal.

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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.

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Designing a System

To double the ra dia tor power, it is possible to vertic a lly or horizonta lly mount two ra dia tors together using the

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RAD 1

RAD 2

Height of Radiators

It is c ritic a l to mount the ra dia tors a t the proper height. If the ra dia tor is mounted too low, the c overa ge

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required a ngle of the ra dia tor will c a use the ra dia tion pa ttern to be c ompromised. The best height of the

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Radiator Mounting Angle

The mounting system for Listen LA-140 ra dia tors a llow you to mount the ra dia tor in 15 degree inc rements.

The best a ngle depends on the sha pe of the room a nd the orienta tion of the ra dia tor to the sea ts within the

room. In genera l, mounting a ngles of 15 a nd 30 degrees provide the best c overa ge.

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Designing a System

Determine the number of radiators required

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is rec ommended tha t you dra w the room out indic a ting the loc a tion of ea c h ra dia tor in the room a nd c a ble

runs from the tra nsmitter(s) a nd power supplies (if a ny) to the ra dia tor. We ha ve provided the room la yout

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Designing a System

Complete the system layout worksheet

C omplete the system la yout worksheet for Power a nd RF c a ble lengths, dela y c ompensa tion, required

number of power supplies, a nd height a nd a ngle of ra dia tors. Refer to the system la yout worksheet

exa mple below.

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Designing a System

Cross out the LT-82 transmitters

C ross out the LT-82 tra nsmitters not required in your system.

Determine how many radiators will be used

Determine how ma ny ra dia tors will be used on ea c h ra dia tor da isy c ha in by reviewing the room la yout work-

sheet. C ross out the unused ra dia tors on the system la yout worksheet.

Write in the coaxial RF cable lengths for each radiator

Write in the c oa xia l RF c a ble lengths for ea c h ra dia tor used in the spa c es provided. Review your room la yout

worksheet for this informa tion.

Draw a connecting line from the power supply output

Dra w a c onnec ting line from the power supply output of the LT-82 tra nsmitter(s) a nd the LA-205 power

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LA-140 ra dia tors.

Cross out the unused power supplies

C ross out the unused power supplies.

Write in the CAT-5 power supply cable lengths

Write in the C AT-5 power supply c a ble lengths for ea c h ra dia tor used in the spa c es provided. Review your

room la yout worksheet for this informa tion.

Determine the delay compensation for each radiator

Now determine the dela y c ompensa tion for ea c h ra dia tor using the Dela y C ompensa tion C a lc ula tor loc a ted

in the ba c k of this design guide. The c orrec t setting of the dela y c ompensa tion is nec essa ry only in systems

where there is overla p in c overa ge between two or more ra dia tors. Write the dela y setting on the System

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Distance of Furthest Radiator (DFR)

Determine whic h ra dia tor is the furthest from the tra nsmitter on one of the two da isy

c ha ins. C a lc ula te the dista nc e from the furthest ra dia tor to the tra nsmitter a nd rec ord it in

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Radiator Distance from Transmitter (RDT)

For ea c h ra dia tor, determine the overa ll dista nc e from the tra nsmitter to the ra dia tor.

Rec ord the va lue of ea c h ra dia tor in the RDT c olumn. See exa mple below.

Cable Delay (CD)

Determine a nd rec ord the propa ga tion dela y of the c oa xia l c a ble being used. For Listen

c oa xia l c a ble the dela y is 1.54 ns/ft or 5.05 ns/m. This informa tion c a n be obta ined from

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Calculate the delay setting for each radiator

Now c a lc ula te the dela y setting for ea c h ra dia tor using the Dela y C ompensa tion

C a lc ula tor. The c a lc ula tor uses the following formula to determine the dela y setting of

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Delay Setting = (DFR – RDT) x CD / 25

NOTE: If your c alc ulations suggest a delay setting greater than nine, please

c ontac t Listen Tec hnologies tec h support for more information.

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Designing a System

Complete the system materials worksheet

C omplete the system ma teria ls worksheet tha t determines the qua ntity of ea c h pa rt number required for your

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Transmitters

Fill in the number of tra nsmitters required. Ea c h tra nsmitter inc ludes a short piec e (15 inc hes) of RG -58

c oa xia l RF c a ble for multiple c ha nnel insta lla tion interc onnec tions. You do not need to order this c a ble.

Transmitter Rack Mounting

Fill in the number of ra c k mounting kits required. One ra c k mount kit c a n mount two LT-82 tra nsmitters.

Radiators

Fill in the number of ea c h type of ra dia tor required. Ea c h ra dia tor c omes with mounting bra c kets for

most types of insta lla tion. In a ddition, the ra dia tor c omes with 25 ft (7.6 m) of c oa xia l RF a nd C AT-5 power

c a bles.

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Designing a System

Radiator Mounting Options

Sinc e the ra dia tor c omes with most ra dia tor mounting options, there a re only two a dditiona l c hoic es.

Dual radiator mounting

The LA-342 dua l ra dia tor mounting bra c ket a llows you to mount two ra dia tors together

(vertic a lly or horizonta lly). This inc ludes short lengths of c oa xia l RF a nd C AT-5 power c a bles.

Floor stand

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Radiator Power Supplies

Fill in the number a nd type of LA-205 power supplies required (if a ny).

Cables

From the System La yout Worksheet, insert the c a ble lengths for the prea ssembled c oa xia l RF c a bles (LA-391)

a nd C AT-5 power c a bles (LA-393).

Receivers

There a re two types of rec eivers to c hoose from. You ma y wa nt to c hoose a c ombina tion of both types of

rec eivers. The stetho type rec eiver ma kes it simple to dispense the units a nd prevents c ord ta ngling. However,

the stetho style for some guests is unc omforta ble espec ia lly for prolonged time periods. The a dva nta ge of the

la nya rd rec eiver is tha t you c a n use ma ny types of different ea rphones. However this c a n ma ke it more

c omplic a ted for distributing a nd the c ords c a n bec ome ta ngled. Ea c h rec eiver c omes with a n a lka line

ba ttery c ompa rtment (no ba tteries). You will need to dec ide whether to use a lka line AAA ba tteries (LA-363)

or a rec ha rgea ble ba ttery pa c k (LA-364). Alka line ba tteries will la st a bout 30 hours while the rec ha rgea ble

ba tteries will la st a bout 15 hours. If you order the rec ha rgea ble ba ttery pa c ks, you will need to order the 8-Unit

C ha rging/Stora ge Sta tion (LA-350).

Stetho Receiver

Fill in the number of LR-42 Stetho rec eivers required a nd the a ppropria te ba ttery options.

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Lanyard Receiver

Fill in the number of LR-44 la nya rd rec eivers required a nd the a ppropria te ba ttery options.

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(DUꢁ6SHDNHUꢁꢏ/$ꢋꢊꢇꢎꢐꢂꢁ6WHUHRꢁ+HDGSKRQHVꢁꢏ/$ꢋꢊꢇꢆꢐꢁDQGꢁWKHꢁ%HKLQGꢋWKHꢋ+HDGꢁ+HDGSKRQHVꢁ

(LA-170). Also, it is a good idea to order a qua ntity of Nec k Loops (LA-166) for c ustomers with

T-c oil equipped hea ring a ids.

Charging/Storage Options

If you c hose rec ha rgea ble ba ttery pa c ks for rec eivers, you need to order the a ppropria te qua ntity a nd type

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mounted on a ta ble or on a wa ll (vertic a lly or horizonta lly).

Other Accessories

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with US ADA regula tions.

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Notes

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System Layout Worksheet

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System Materials Worksheet

Description Stationary IR Transmitter

Power Cord USA

Part Number LT-82-01

LT-82-02

Euro

LT-82-03

Transmitters

Quantity

Description Universal Rack Mount Kit (Mounts two LT-82 units)

Part Number LA-326

Transmitter Rack Mounting

Quantity

Description Stationary IR Radiator

Color

Grey

White

LA-140-WH

Radiators

Part Number LA-140-GY

Quantity

Description Dual Radiator Mounting Bracket

Part Number LA-342

IR Radiator Floor Stand

LA-337

Radiator Mounting Options

Quantity

Description IR System Power Supply

Power Cord USA

Part Number LA-205-01

LA-205-02

Euro

LA-205-03

Radiator Power Supplies

Required

Quantity

Description BNC/RG-58 Coaxial Cable Preassembled (RF)

Part Number LA-391

Cable 1

RJ-45/CAT-5 Cable Preassembled (Power)

LA-393

Cable 2

Cable 3

Cable 4

Cable 5

Cables (length in feet)

Cable 6

Cable 7

Cable 8

Cable 9

Cable 10

Cable 11

Cable 12

Note: Each radiator includes 25 feet (7.6 meters) of RG-58 coaxial RF cable and CAT-5 power supply cable.

Description Stetho Receiver

Part Number LR-42

Rechargeable Battery Pack

LA-364

Alkaline Batteries

LA-363

Replacement Eartips (20)

LA-151

Stetho

Receiver

Quantity

Receivers

Recharge-

able Battery

Pack

Stereo

Head-

phones

LA-165

Lanyard

Description

Alkaline

Behind-the

-Headphones

Single Ear Dual Ear

Ear Speaker

Batteries

Neck Loop

LA-166

Receiver

Bud

Buds

Lanyard

Receiver

Part Number LR-44

Quantity

LA-364

LA-363

LA-164

LA-170

LA-161

LA-162

Description 8-Unit Charging/Storage Station

8-Unit Storage Station

Power Cord USA

Part Number LA-350-01

LA-350-02

Euro

LA-350-03

N/A

LA-351

Charging/Storage Stations

Other Accessories

Quantity

Description ADA Compliance Signage Kit (US Only)

Part Number LA-304

Quantity

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LT-82 User’s Manual Table of Contents

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Quic k Referenc e Pa ge

Setup a nd Opera ting Instruc tions

Ac c essories for LT-82

LT-82 Pac kage Contents

• LT-82 IR Tra nsmitter

• LA-205 Power Supply

• LA-89 IR Interc onnec tion C a ble

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• LT-82 Quic k Referenc e C a rd

LT-82 IR Tra nsmitter

LA-89 IR Interc onnec tion C a ble

LA-205 Power Supply

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• LT-82-01 (North Americ a )

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• LT-82-03 (Euro)

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$UFKLWHFWXUDOꢀ6SHFLÀFDWLRQ

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selec tion sha ll be c a pa ble of being loc ked. Multiple tra nsmitters sha ll be c a pa ble of being da isy-c ha ined together to tra nsmit up to

four c ha nnels simulta neously. The tra nsmitter sha ll ha ve a timer tha t shuts off the c a rriers a fter 30 minutes when no a udio is present a t

the tra nsmitter. The tra nsmitter sha ll ha ve a SNR of 60 db or better. The devic e sha ll ha ve a n a udio frequenc y response of 63 Hz to 15

kHz, +/- 3db. It sha ll ha ve two mixing a udio inputs, one ba la nc ed XLR/phone input a nd one unba la nc ed RC A input. The devic e sha ll

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proc essor tha t is c a pa ble of a utoma tic ga in c ontrol a nd limiting. The tra nsmitter sha ll provide power for up to two ra dia tors over

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Speciﬁcation

LT-82

Carrier Frequencies

Number of Channels

Carrier Shut Oﬀ0

Frequency Accuracy

Transmitter Stability

Selectable: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz

Four channels. Selectable one channel per transmitter (mono or stereo)

Carrier will shut oﬀ when no audio is present for 30 minutes to preserve radiator life.

+/- .005% stability 0 to 50C

50 PPM

(Two (2) BNC connectors, for connection to radiator(s) and/or additional transmitter(s).

50 mV, 50 ohm, -15 dBm

RF Output

One (1) BNC connector, for connection from additional transmitter(s).

50 mV, 50 ohm, -15 dBm

RF Input

Compliance

FCC Part 15, Industry Canada, CE, RoHS

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

System Frequency Response

63Hz - 15kHz (+/- 3dB)

Mono: >60dB

Stereo: >52dB

System Signal to Noise Ratio (A-weighted)

System Distortion

<2% total harmonic distortion (THD)

Mono Input (Rear Panel). Female-XLR and 1/4 in combo connector, balanced, 0/-

55dBu (line/mic) nominal input level adjustable; -30/+21dBu (mic/line) maximum

input level; impedance 20k/1k ohms (line/mic); phantom power +12VDC

Stereo or Mono Input (Rear Panel). (Two) Phono connectors, unbalanced, -10/+10dBu

nominal input level adjustable, +30dBu maximum, impedance 100k ohms

Audio Input 1

Audio

Audio Input 2

Audio Processing

Contour

Compression can be turned on/oﬀ. Slope adjustable from 1:1 to 4:1. Default 2:1

Cuts and boosts frequencies above 5 kHz

Input 1 and Input 2 Mixed Output (Rear panel). Two (2) Phono connectors, unbal-

anced, -10dBu nominal output level, +19dBu maximum, impedance 10 ohms.

Front panel. (One) 3.5mm connector, unbalanced, adjustable output level, +7dBu

maximum, impedance 10 ohms. 100mW, 32 ohms, 3.5mm stereo.

Combined Audio Output (Mix)

Headphone Output (Monitor)

Power, Test Tone on/oﬀ, Channel up/down, Input Level, Transmit Level, Contour,

Headset Level

Front Panel

Rear Panel

Internal Adjustments

Programming

Input 1 Level (Line, Mic, Mic-Phantom Power), Input 2 Level (-10/+10 dBu)

Compression ratio for audio processor

Stereo on/oﬀ, Processing on/oﬀ

Controls

Unit Power

Input 1, Input 2, Transmit Level

Stereo

Red LED illuminates when the unit is powered up (front panel)

Indicates Input 1, Input 2, and Transmit audio levels. 10 segment LED’s (8 green, 2 red)

Indicated by a green LED when on (front panel)

Indicators

Processing

Indicated by a green LED when on (front panel)

RF Carrier

LCD Display

Test Tone

Indicates carrier is active on the LCD Display (front panel)

Channel designation, lock status, RF Carrier, programming (front panel)

Red LED illuminates when test tone enabled (front panel)

In-line switching mode power supply, Listen part number LA-205

Input: 100-240 VAC, 47-63 hz

Power Supply

Output: 30 VDC, 1.5 A

Output Connector: RJ-45

Compliance: UL and CE Listed

Power

Power Output:

Two (2) RJ-45 jacks. For remote powering up to 2 radiators.

North America, Type B, (LT-82-01)

Asia, UK, Type G, (LT-82-02)

Power Line Cord

Euro type J, (LA-82-03)

Dimensions (H x W x D)

Color

Unit Weight

1.75 x 8.50 x 9.13 in. (4.5 x 21.5 x 23 cm)

Grey with White Silk Screening

2.6 lbs. (5.7 kg)

Physical

Unit Weight with LA-205 Power Supply

Shipping Weight

3.8 lbs. (8.3 kg)

4.4 lbs. (9.7 kg)

One rack space height, 1/2 rack space wide. One or two transmitters can be mounted

in one rack space. Optional rack mount (LA-326) not included.

Rack Mounting

Temperature - Operation

Temperature - Storage

Humidity

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

-20 C (-4 F) to +50 (122 F)

0 to 95% relative humidity, non-condensing

Environ-

mental

•Speciﬁcations are subject to change without notiﬁcation.

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LT-82 Bloc k Diagram

POWER

3.5MM

Stereo

Off

Red

LED

CHANNEL SELECT

HEADPHONE

Universa l

Power Supply

LA-205

115/230VAC

50/60hz

Volume

30VDC , 1.5A

(provided)

Down

Power Supply

C PU Module

Tra nsmit Level

Automa tic

Termina l

C AT5

Meter

Listen LC D Displa y

Ba c klit

Overloa d

Protec tion

DC Out

C ompression Ra tio

(interna l a djustment)

OUT

Tra nsmitter RF Boa rd

Stereo G enera tor

Pre-empha sis

Proc essing

BNC

G reen

LED

G reen

LED

Transmit

LEVEL

Off

CONTOUR

Off

Func tions c ontrolled by the C PU Module

STEREO

PROCESS

Input 1 VU

Meter

Input 2 VU

Meter

Input Level POT

Front Pa nel

12VDC

Input 1 Level Selec t Line,

Mic , Mic -pha ntom Pwr

Mic

Pha ntom

Pwr

Mic

Line

Input 2 Level Selec t

-10dBu, +10dBu

Test Tone Button

Front Pa nel

Off

+10

-10

Red

LED

400Hz

TEST TONE

Fema le XLR-1/4”

C ombo C onnec tor

2/Tip 3/Ring

1/Sleeve

INPUT 1

Mono Only

Phono

INPUT 2

Mono/Stereo

OUTPUT

Mono/Stereo

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LT-82 Quic k Referenc e

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a nd Input 2 levels.

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Adjust a udio

input levels of

Input 1 a nd

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Input 2 here

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quic k referenc e

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hea dset to

monitor a udio

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tone to a id system setup

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func tions

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boosts or c uts high frequenc ies

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Input a dditiona l RF

signa l here for

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input for c onnec tion

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multi-c ha nnel systems

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a c c epts either a XLR

or ¼” phono plug

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Pha ntom power a va ila ble in Mic -PH Power position

signa l to ra dia tor(s)

a nd/or a dditiona l LT-82

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ma tc h the level of your Input 2 sourc e

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supply here (inc luded)

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Input 2 mixed a udio outputs

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to power up to two ra dia tors

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c ha nnel the LT-82 is c urrently on

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tra nsmitter is outputting RF

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is in progra m mode

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loc ked on c urrent c ha nnel

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LT-82 Setup and Operating Instruc tions

Unpack the Product

Remove outer pa c ka ging a nd pla stic c over. Verify a ll c omponents a re

present a nd no physic a l da ma ge ha s oc c urred to the produc t.

Mount LT-82(s) in Rack (if desired)

If ra c k mounting the tra nsmitter(s), insta ll the optiona l ra c k mount kit (pa rt LA-326) a c c ording to the

instruc tions inc luded with the kit.

Ra c k Mount with single unit insta lled.

Ra c k Mount with dua l units insta lled.

Interconnect Multiple LT-82s (if necessary)

If insta lling more tha n one tra nsmitter (for multi-c ha nnel a pplic a tions) it will be nec essa ry

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tra nsmitter. C ontinue da isy-c ha ining up to four tra nsmitters (four c ha nnels).

Connect LT-82 RF Signal to Radiator(s)

C onnec t RF output on tra nsmitter to RF input on ra dia tor. In multi-c ha nnel systems

c onnec t the la st tra nsmitter in the da isy-c ha in to the ra dia tor(s) RF input. See design

guide for more informa tion on c onnec ting multi-c ha nnel systems.

RF Signa l on c oa xia l c a ble

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LT-82 Setup and Operating Instruc tions

Connect LT-82 Power to Radiator(s)(if desired)

The ra dia tor(s) c a n be powered by either the tra nsmitter Power Output or remotely with a power

supply (LA-205) nea r the ra dia tor. If powering the ra dia tor(s) with the tra nsmitter, c onnec t the

tra nsmitter Power Output to the ra dia tor Power Input with C AT-5 c a ble.

NOTE: A maximum of two radiators c an be powered by eac h LT-82. It is important not to exc eed

powering more than two radiators per transmitter or external power supply.

RF Signa l on

c oa xia l c a ble

Powering the LT-82

ra dia tor power on C AT-5 c a ble

Plug the included power supply into the Power Input connection

Plug the inc luded power supply into the Power Input c onnec tion on the rea r pa nel of the tra nsmitter, a nd

then plug the power supply into a n outlet.

ATTENTION: Do not c onnec t the LT-82 power supply to an outlet until all other

power c onnec tions within the system have been made. This helps

to prevent power c onnec tion degradation.

Press the Power button

Press the Power button on the front pa nel of tra nsmitter(s) to turn the unit(s) on.

RF Signa l on

c oa xia l c a ble

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before c onnec ting to

power outlet

ra dia tor power on C AT-5 c a ble

TX power c a ble

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LT-82 Setup and Operating Instruc tions

Select Operating Channel

Select the operating channel

Selec t the opera ting c ha nnel (1-4). For single c ha nnel systems a ny c ha nnel c a n be used. In multi-c ha nnel

systems ea c h tra nsmitter must be on a different c ha nnel.

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C ha nnel selec t buttons

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RF-Oﬀ Channel Setting Information

This c ha nnel does not ha ve a c a rrier present however a llows pa ss through from RF input to RF output.

This a llows a c ha nnel to be disa bled in a da isy c ha in but a llows the system to still opera te a s the RF signa l

from the tra nsmitter(s) before it will still pa ss through. Note tha t the power (RJ-45 with C AT-5 c onnec tors)

will pa ss through in a ll c onditions (unit off, c ha nnel -- or c ha nnels 1-4).

RF-Off C ha nnel Setting

After channels have been selected, the transmitter(s) can be locked

After c ha nnels ha ve been selec ted, the tra nsmitter(s) c a n be loc ked on tha t c ha nnel by pressing

a nd holding the C ha nnel Selec t Up button for three sec onds. When loc ked, a pa dloc k ic on will be

displa yed on the LC D (see below).

Ic on indic a tes

c ha nnel is loc ked

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LT-82 Setup and Operating Instruc tions

Connect Audio Inputs

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ba la nc ed c onnec tion using either a n XLR or 1/4” phono c onnec tor.

Input 2 ha s two unba la nc ed mixing phono c onnec tors. Use Input 1 if you

a re using a mic rophone or if you ha ve a ba la nc ed c onnec tion suc h a s

from a professiona l a udio mixer (you c a n a lso use Input 1 for

unba la nc ed c onnec tions). Use Input 2 to c onnec t to a n unba la nc ed

a udio sourc e.

If using Input 1

C onnec t the a udio sourc e(s) to one or both a udio input c onnec tions. Input 1 offers a c hoic e of ba la nc ed

XLR or 1/4” phono c onnec tor. Plug your mic rophone into Input 1 a nd move the input selec t switc h to

Mic (for dyna mic mic rophones) or Mic + PH Power (for c ondenser mic rophones). Plug your ba la nc ed or

unba la nc ed a udio sourc e into Input 1. Use the following dia gra m.

XLR Wiring

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Ba la nc ed

Unba la nc ed

Tip

Ring

Sleeve

Input from

Top Ring

Top Ring/Sleeve

Ba la nc ed

Unba la nc ed

Audio

Sourc e

Audio from

Audio

Ba la nc ed

Audio

Sourc e

Unba la nc ed

Audio

Sourc e

If using Input 2

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ma tc h the a udio level c oming from your equipment.

ATTENTION: When using Input 1 and Input 2 simultaneously, the audio signals will mix together.

Input 1 will mix with both left and right signals of Input 2.

Test Tone (if necessary)

To broa dc a st a test tone, press the test tone button. This helps to test

rec eivers when no a udio sourc e is a va ila ble.

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LT-82 Setup and Operating Instruc tions

Set Stereo and Process Features

Stereo and Process Mode Descriptions

Stereo Mode

A stereo signa l c a n be tra nsmitted to the rec eivers. Input 2 must be used if a stereo signa l is

desired a nd the stereo mode must be ena bled on the tra nsmitter.

ATTENTION: If the transmitter is in stereo mode the rec eivers will need to be

put into stereo mode. Refer to page 102 for more information.

Process Mode

Proc ess mode is used for Audio G a in C ontrol (AG C ). With the proc ess mode ena bled, the

LT-82 will a utoma tic a lly a djust for inc onsistent signa l input levels by ra ising or lowering the

signa l level a c c ordingly to provide a c onsistent sound output level. This fea ture should be

used in a pplic a tions where a c onsistent sound level is importa nt a nd the input levels va ry

VXEVWDQWLDOO\ꢀꢁ7\SLFDOO\ꢁ\RXꢁZRXOGꢁQRWꢁZDQWꢁWRꢁHQJDJHꢁWKHꢁ3URFHVVꢁ0RGHꢁZKHQꢁDꢁVSHDNHU·Vꢁ

empha sis is c ritic a l to the messa ge they a re c onveying.

To Disable or Enable Stereo and Process Features

Transmitter is shipped to you with Stereo and Process disabled

Your tra nsmitter is shipped to you with Stereo a nd Proc ess disa bled.

With the unit on press and hold the channel select “Down” button

With the unit on, press a nd hold the c ha nnel selec t “Down” button for eight

sec onds. The progra m (PG M) ic on will a ppea r on the LC D. Onc e in the progra m

mode, the Stereo a nd Proc ess fea tures c a n be turned on a nd off by pressing the

c ha nnel selec t buttons. Press the c ha nnel selec t “Up” button to toggle

between Proc ess On a nd Off. Press the c ha nnel selec t “Down” button to toggle

between Stereo On a nd Off.

If the green LED is displa yed on the front pa nel, tha t fea ture is ena bled. Onc e you ha ve

ena bled or disa bled the fea tures a s desired, let the tra nsmitter exit the progra m mode

E\ꢁZDLWLQJꢁÀYHꢁVHFRQGVꢀ

Set Auto-Timeout Feature

If 30 minutes passes without audio to transmitter the unit will stop sending a signal to the radiators

10A

When the L/O ic on is illumina ted on the LC D a nd a period of 30 minutes pa sses without a udio being

input to the tra nsmitter the unit will stop sending a signa l to the ra dia tors. This is done to help c onserve

LED life on the ra dia tors.

10B

To disable or enable Auto-Timeout Feature

Your transmitter is shipped to you with the Auto-Timeout Feature enabled

Your tra nsmitter is shipped to you with the Auto-Timeout Fea ture ena bled.

To disable the Auto-Timeout Feature

To disa ble the Auto-Timeout Fea ture press a nd hold the “down” button while

turning the unit on.

To enable the Auto-Timeout Feature

To ena ble the Auto-Timeout Fea ture press a nd hold the “up” button while

turning the unit on.

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Ac c essories for LT-82

$FFHVVRULHV

LA-326 Universa l

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Will mount up to two LT-82 units

LA-112

LA-70

RG -58 50 Ohm C oa xia l C a ble

C AT-5 C a ble

Spec ify length

LA-115

LA-127

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LA-391

ꢁ5*ꢋꢆꢈꢁ%1&ꢁWRꢁ

%1&ꢁ&RXSOHU

RG -58/50 Ohm C oa xia l C a ble

Prea ssembled, spec ify length

LA-71

LA-72

LA-393

RJ-45 to RJ-45 C AT-5 C oupler

RJ-45 C AT-5 C onnec tor

RJ-45/C AT-5

(Pkg. of 10)

Prea ssembled, spec ify length

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Notes

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Notes

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Notes

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LA-140 User’s Manual Table of Contents

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ꢁ

ꢆꢅ

Quic k Referenc e Pa ge

Setup Instruc tions

LED Indic a tions

Mounting Your Ra dia tor

Ac c essories for LA-140

LA-140 Pac kage Contents

• LA-140 Sta tiona ry IR Ra dia tor

• IR Ra dia tor Quic k Referenc e C a rd

• 25 feet RG -58 C oa xia l C a ble

• 25 feet C AT-5 Power C a ble

• IR Ra dia tor Mounting Ha rdwa re

ꢁ

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• Tilt Arm “A”

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• Hollow Wa ll Anc hors with Sc rews

• Mounting Ha rdwa re Sc rews

• Universa l Sta nd Nut

LA-140

x10

&RUQHUꢁ0RXQWꢁ%UDFNHW Mounting Ha rdwa re Sc rews

C oa xia l RG -58 (25 feet)

C AT-5 (25 feet)

8QLYHUVDOꢁ%UDFNHW

7LOWꢁ%ROW

Hollow Wa ll Anc hors with Sc rews

Tilt Arm “A”

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Universa l Sta nd Nut

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/LVWHQꢀ&RQÀJXUDWLRQV

• LA-140-G Y (grey)

• LA-140-WH (white)

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/$ꢁꢄꢅꢆꢀ6SHFLÀFDWLRQV

$UFKLWHFWXUDOꢀ6SHFLÀFDWLRQ

The ra dia tor-emitter sha ll ha ve a single c a rrier tra nsmitting a rea of no less tha n 10,000 ft²(929

m²ꢐꢁRUꢁJUHDWHUꢁIRUꢁHDFKꢁUDGLDWRUꢁVSHFLÀHGꢁZKHQꢁXVHGꢁZLWKꢁVSHFLÀHGꢁUHFHLYHUꢀꢁ

The ra dia tor sha ll be powered via C AT-5 c a bling a nd the RF from the tra nsmitter sha ll be

c a rried by 50 ohm c oa xia l c a ble. The ra dia tor sha ll ha ve three indic a ting LEDs for power, no

c a rrier present a nd c a rrier present. The ra dia tor LEDs sha ll be dea c tiva ted a fter 30 minutes

if there is no a udio signa l present from the tra nsmitter. The ra dia tor sha ll c ome in a white or

grey c olor a nd sha ll inc lude a ll of the mounting ha rdwa re c a pa ble of mounting the ra dia tor

on a wa ll, on a c eiling, in a c orner, on a desk, on a mic sta nd, or on a tripod. The Listen

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Speciﬁcations

Frequency Range

LA-140

1 MHz - 5 Mhz

Input

BNC Connection. -25dbm to -5dbm input nominal

BNC Connection. -15 dbm nominal

Output

Compliance

Coverage Area

FCC Part 15, Industry Canada, CE, RoHS

10,000 ft (929 m ) when used with Listen Receivers

Termination Switch, Delay Compensation Switch, Indicator LEDs on/oﬀ,

compatibility switch.

Controls

User Controls

Red LED

Indicates power is present

Indicators

Yellow LED

Green LED

Indicates no connection to transmitter or radiator

Indicates carrier and power are present and radiator is emitting IR signal

RJ-45 connector. 30VDC, powered from transmitter via CAT-5 cable or op-

tional LA-205 power supply.

Input

RJ-45 connector. 30VDC, powers up to one additional radiator. (Maximum

(two) 2 radiators powered from each LT-82 transmitter or LA-205 power sup-

ply)

Power

Output

Emitter Power

3 Watts

Dimensions (H x W x D)

Color

5.50 x 8.00 x 2.60 in. (140 x 203 x 66 mm)

LA-140-GY (Grey), LA-140-WH (White)

2.1 lbs (.95 kg)

Unit Weight

Physical

Unit Weight with Wall/ Ceiling

Mounting

2.35 lbs (1.05 kg)

hardware

Shipping Weight

4.0 lbs. (1.8 kg)

Temperature - Operation

Temperature - Storage

Humidity

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

Environmental

-20 C (-4 F) to +50 (122 F)

0 to 95% relative humidity, non-condensing

•Speciﬁcations are subject to change without notiﬁcation.

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LA-140 Quic k Referenc e

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This yellow LED is lit when

the ra dia tor is not

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This green LED is lit when there

is signa l present to the

c onnec ted to a

tra nsmitter or ra dia tor.

ra dia tor. During norma l

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This red LED is lit when

there is power to the ra dia tor.

opera tion the red a nd green

LEDs will be c ontinuously lit.

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Input RF signa l from a

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tra nsmitter or ra dia tor here.

5)ꢁ2XWSXWꢄꢁ

Output RF signa l to a n

a dditiona l ra dia tor here.

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C ontrols LED indic a tors on front of

ra dia tor. If switc h is set to the “OFF”

position, LEDs will not light up on

front of ra dia tor.

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Adjust the a mount of signa l dela y

from the ra dia tor here. In single

ra dia tor systems the position

of this switc h does not ma tter,

in multiple ra dia tor systems this

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tra nsmitter/modula tor it is nec essa ry

to put this switc h in the “ON” position.

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“OFF” position when using a Listen LT-82

Tra nsmitter.

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RF being output from the RF

Output c onnec tion, this switc h

must be in the “ON” position.

switc h must be set properly.

see pa ge 56

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LA-140 Setup and Operating Instruc tions

Unpack the Product

Remove outer pa c ka ging a nd pla stic c over. Verify a ll c omponents a re

present a nd tha t no physic a l da ma ge ha s oc c urred to the produc t.

Mount Radiator

Determining Location

G enera lly a higher loc a tion with a c lea r line of sight to the a rea the rec eivers will be used in is rec ommended.

Refer to the design guide for deta iled instruc tions a bout determining the loc a tion to mount the ra dia tor(s).

Mounting in Desired Location

See “Mounting your Ra dia tor” sec tion on pa ge 58

for deta iled instruc tions on mounting your ra dia tor.

Connect RF Signal

Ea c h ra dia tor must be supplied a n RF signa l on RG -58 c oa xia l c a ble. The RF c a ble c a n origina te either

from a n LT-82 Tra nsmitter or from a different ra dia tor. C onnec t the RF signa l to the ra dia tor. See design

guide for more informa tion on supplying RF signa l to the ra dia tor(s).

RF Signa l on c oa xia l c a ble

Connect Power

Ea c h ra dia tor must be supplied DC power via C AT-5 c a ble. One LT-82 Tra nsmitter c a n power up to two

ra dia tors, a lso up to two ra dia tors c a n be powered using a n “IR Extended Power Supply” (Listen pa rt

number LA-205). C onnec t DC power to the ra dia tor. See design guide for more informa tion on supplying

DC power to the ra dia tor(s).

RF Signa l on

c oa xia l c a ble

ra dia tor power on C AT-5 c a ble

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LA-140 Setup and Operating Instruc tions

Set Delay Compensation Switch

Single Radiator Systems

The position of the dela y c ompensa tion switc h does not ma tter in single ra dia tor systems.

Multiple Radiator Systems

It is nec essa ry to selec t the c orrec t dela y c ompensa tion switc h

setting for ea c h ra dia tor to ensure tha t ea c h ra dia tor tra nsmits

the sa me signa l a t exa c tly the sa me time in a n overla pping

,multiple ra dia tor system. Not setting the dela y c ompensa tion

switc h c orrec tly will result in reduc ed c overa ge a rea for the

system. See design guide pa ge 16 for determining the c orrec t

dela y c ompensa tion switc h setting for ea c h ra dia tor in a multiple

ra dia tor system.

Dela y C ompensa tion Switc h

Set Termination Switch

Single Radiator Systems

Alwa ys set the termina tion switc h to the “ON” position in single ra dia tor systems.

Multiple Radiator Systems

Set the termina tion switc h to the “OFF” position on a ll ra dia tors

tha t a re outputting a n RF signa l to a nother ra dia tor.

Set the termina tion switc h to the “ON” position on the ra dia tors

tha t a re not outputting a n RF signa l to a nother ra dia tor.

Termina tion Switc h

Set LED Indicator Shutoﬀ Switch (SW1)

If desired, the three LED indic a tors on the front of the ra dia tor c a n be disa bled using this switc h. Set this

switc h to the position towa rds the left side of the rea r of the ra dia tor to disa ble the LED indic a tors.

To ena ble the LED indic a tors set this switc h to the position towa rds the right side of the rea r of the ra dia tor.

LED Indic a tor Shutoff Switc h (SW1)

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LA-140 Setup and Operating Instruc tions

Set Compatibility Switch (SW2)

If using a Listen LT-82 Tra nsmitter with the Listen LA-140 Ra dia tor lea ve this switc h in the “OFF” position.

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switc h to the “ON” position.

IMPORTANT: Ensure this switc h is in the “OFF” position whenever using the radiator

with the Listen LT-82 Transmitter.

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Front LED Indicators

There a re three LEDs loc a ted on the bottom c enter of the front of the ra dia tor. These LEDs a re very useful

for determining the c urrent sta tus of the ra dia tor. See below for possible LED c ombina tions a nd how to

interpret wha t the c ombina tions mea n.

ATTENTION: The LEDs c an be disabled using switc h 1 loc ated on the rear of the radiator. If you believe

there is power to the radiator but there are no LED indic ations on the front of the radiator,

switc h 1 has likely been set to the “OFF” position. Make sure switc h 1 is in the “ON” position

before attempting to c hec k the status of the radiator.

Red LED

The red LED is the “Power On” LED. If the Red LED is lit, the ra dia tor ha s power.

Yellow LED

The yellow LED is the “no c onnec tion” LED. If lit, the ra dia tor is not c onnec ted to a tra nsmitter or a nother ra dia tor.

When properly c onnec ted the yellow LED will be extinguished.

Green LED

The green LED is the “Signa l Present” LED. If the green LED is lit, the ra dia tor is outputting a n IR signa l into the room.

During norma l opera tion the red a nd green LEDs will be on simulta neously (unless defea ted by SWI)

Red LED

Yellow LED

G reen LED

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LA-140 – Mounting your Radiator

Overview

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but is required for mounting two ra dia tors side-by-side). Rea d through the following mounting stra tegies

to determine whic h works best for your a pplic a tion a nd then follow the instruc tions for mounting.

NOTE: The parts in this sec tion are not shown to sc ale.

Mounting Hardware Pieces

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Tilt Arm “A”

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Universa l Sta nd Nut

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Hollow Wa ll Anc hors with Sc rews (3 of ea c h)

Mounting Ha rdwa re Sc rews (10)

Sec urity C a ble (a tta c hed to ra dia tor)

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Hollow Wa ll Anc hors with Sc rews

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Tilt Arm “A”

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Universa l Sta nd Nut

Mounting Ha rdwa re Sc rews

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LA-140 – Mounting your Radiator

Wall Box Mounting

The wa ll box mount is a preferred mounting option for the LA-140 IR Ra dia tor. The wa ll box mount a l-

lows sec ure mounting of the ra dia tor a s well a s for a llowing the nec essa ry c a bles to be pla c ed inside

the wa ll.

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• Mounting Ha rdwa re Sc rews

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• Tilt Arm “A”

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• Mounting Ha rdwa re Sc rews

Installation Steps

Mounting Ha rdwa re Sc rews

Tilt Arm “A”

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Screw Wall Box Plate to wall

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Attach Tilt Arm “A”

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WKDWꢁLWꢁVLWVꢁDFURVVꢁ:DOOꢁ%R[ꢁ3ODWHꢂꢁQRWꢁXSꢁDQGꢁGRZQꢁRQꢁSODWHꢀꢁ

Attach Tilt Arm “B”

$WWDFKꢁ7LOWꢁ$UPꢁ´%µꢁWRꢁ6ZLQJꢁ$UPꢁRIꢁUDGLDWRUꢁꢏVZLQJꢁDUPꢁFRPHVꢁDWWDFKHGꢁWRꢁUHDUꢁRIꢁUDGLDWRUꢐꢁXVLQJꢁLQFOXGHGꢁ0RXQWLQJꢁ

Ha rdwa re Sc rews. Any of the seven holes in Swing Arm c a n be used for this.

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LA-140 – Mounting your Radiator

Pull CAT-5 and Coaxial cables through (if necessary)

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Determine correct angle

Determine c orrec t a ngle setting to use for the ra dia tor using the design guide, see pa ge 13 of design guide.

Attach Radiator to Wall Box Plate

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ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the c orrec t angle is selec ted

before fully tightening Tilt Bolt.

Attach Safety Mounting Cable

The ra dia tor ha s a sa fety c a ble a tta c hed to the top of the swing a rm. This c a ble must be a tta c hed to a sec ure ba se to

prevent the ra dia tor from fa lling in the event of a mounting ha rdwa re c omponent fa iling. Possible injury to persons a nd

da ma ge to the ra dia tor is prevented by sec urely a tta c hing this c a ble to a ba se.

a tta c h to a sec ure ba se

Connect CAT-5 and Coaxial cables

C onnec t C AT-5 a nd C oa xia l c a bles to a ppropria te loc a tions on ra dia tor.

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LA-140 – Mounting your Radiator

Hollow Wall Mounting

A hollow wa ll insta lla tion is not a s preferra ble a s a wa ll box insta lla tion but c a n be done without problems.

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• Hollow Wa ll Mounting Sc rews

• Tilt Arm “A”

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Hollow Wa ll Anc hors with Sc rews

Mounting Ha rdwa re Sc rews

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• Mounting Ha rdwa re Sc rews

Installation Steps

Tilt Arm “A”

7LOWꢁ$UPꢁ´%µ

Fasten Wall Box Plate to wall

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ATTENTION: The Wall Box Plate must be used in this installation to provide a sec ure base for the radiator

to be mounted on.

Attach Tilt Arm “A”

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LA-140 – Mounting your Radiator

Attach Tilt Arm “B”

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Ha rdwa re Sc rews. Any of the seven holes in Swing Arm c a n be used for this.

Pull CAT-5 and Coaxial cables through (if necessary)

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Determine correct angle

Determine c orrec t a ngle setting to use for the ra dia tor using the design guide, see pa ge 13 of design guide.

Attach Radiator to Wall Box Plate

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ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the c orrec t angle is selec ted

before fully tightening Tilt Bolt.

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LA-140 – Mounting your Radiator

Attach Safety Mounting Cable

The ra dia tor ha s a sa fety c a ble a tta c hed to the top of the swing a rm. This c a ble must be a tta c hed to a sec ure ba se to

prevent the ra dia tor from fa lling in the event of a mounting ha rdwa re c omponent fa iling. Possible injury to persons a nd

da ma ge to the ra dia tor is prevented by sec urely a tta c hing this c a ble to a ba se.

a tta c h to a sec ure ba se

Connect CAT-5 and Coaxial cables

C onnec t C AT-5 a nd C oa xia l c a bles to a ppropria te loc a tions on ra dia tor.

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LA-140 – Mounting your Radiator

Corner Mounting

The ra dia tor is mounted in the c orner of a room with or without a wa ll box a va ila ble for this use. A wa ll

box must be a t lea st four inc hes from the c orner if using for this insta ll.

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• Mounting Ha rdwa re Sc rews (if a tta c hing to wa ll box)

• Hollow Wa ll Anc hors with Sc rews (if a tta c hing to hollow wa ll)

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• Mounting Ha rdwa re Sc rews

• Tilt Arm “A”

‡ꢁ7LOWꢁ$UPꢁ´%µ

‡ꢁ7LOWꢁ%ROW

:DOOꢁ%R[ꢁ3ODWH

7LOWꢁ%ROW

&RUQHUꢁ0RXQWꢁ%UDFNHW

Hollow Wa ll Anc hors with Sc rews

Tilt Arm “A”

7LOWꢁ$UPꢁ´%µ

Mounting Ha rdwa re Sc rews :DOOꢁ%R[ꢁ3ODWHꢁ0RXQWLQJꢁ6FUHZV

Installation Steps

Fasten Wall Box Plate to wall

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,03257$17ꢇꢀ:DOOꢀ%R[ꢀ3ODWHꢀPXVWꢀEHꢀDWꢀOHDVWꢀIRXUꢀLQFKHVꢀIURPꢀFRUQHUꢀWRꢀHQVXUHꢀFRUQHUꢀEUDFNHWꢀZLOOꢀÀWꢀLQꢀFRUQHUꢈ

If using a wa ll box (wa ll box must be four inc hes from c orner),

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DWWDFKꢁ:DOOꢁ%R[ꢁ3ODWHꢁVHFXUHO\ꢁWRꢁZDOOꢁXVLQJꢁLQFOXGHGꢁ+ROORZꢁ:DOOꢁ0RXQWLQJꢁ6FUHZVꢀ

ATTENTION: The Wall Box Plate must be used in this installation to provide a sec ure base

for the radiator to be mounted on.

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LA-140 – Mounting your Radiator

Attach Corner Mount Bracket

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Mounting Ha rwa re Sc rews. Use a ll four a va ila ble holes to ensure a

sec ure a tta c hment.

Attach Tilt Arm “A”

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&RUQHUꢁ0RXQWꢁ%UDFNHWꢁDQGꢁGHWHUPLQLQJꢁGHVLUHGꢁSRVLWLRQꢁLQꢁFRUQHUꢀ

Attach Tilt Arm “B”

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Ha rdwa re Sc rews. Any of the seven holes in Swing Arm c a n be used for this c onnec tion.

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LA-140 – Mounting your Radiator

Pull CAT-5 and Coaxial cables through

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Determine correct angle

Determine c orrec t a ngle setting to use for the ra dia tor using the design guide, see pa ge 13 of design guide.

Attach Radiator to Corner Mount Bracket

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together.

ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the c orrec t angle is selec ted

before fully tightening Tilt Bolt.

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LA-140 – Mounting your Radiator

Attach Safety Mounting Cable

The ra dia tor ha s a sa fety c a ble a tta c hed to the top of the swing a rm. This c a ble must be a tta c hed to a sec ure ba se to

prevent the ra dia tor from fa lling in the event of a mounting ha rdwa re c omponent fa iling. Possible injury to persons a nd

da ma ge to the ra dia tor is prevented by sec urely a tta c hing this c a ble to a ba se.

Connect CAT-5 and Coaxial cables

C onnec t C AT-5 a nd C oa xia l c a bles to a ppropria te loc a tions on ra dia tor.

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LA-140 – Mounting your Radiator

Ceiling Mounting

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• Hollow Wa ll Mounting Sc rews (if a tta c hing to wa ll box) or

Hollow Wa ll Anc hors with Sc rews (if a tta c hed to hollow wa ll)

• Tilt Arm “A”

‡ꢁ7LOWꢁ$UPꢁ´%µ

‡ꢁ7LOWꢁ%ROW

• Mounting Ha rdwa re Sc rews

Anchors with

:DOOꢁ%R[ꢁ3ODWH

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Hollow Wa ll Anc hors with Sc rews

Mounting Ha rdwa re Sc rews

:DOOꢁ%R[ꢁ3ODWHꢁ0RXQWLQJꢁ6FUHZV

Tilt Arm “A”

7LOWꢁ$UPꢁ´%µ

Installation Steps

Attach Wall Box Plate securely to ceiling

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Sc rews

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Hollow Wa ll Anc hors with Sc rews.

ATTENTION: The Wall Box Plate must be used in this installation to provide a sec ure base

for the radiator to be mounted on.

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LA-140 – Mounting your Radiator

Attach Tilt Arm “A”

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Mounting Ha rdwa re Sc rews, not up a nd down on pla te.

Attach Tilt Arm “B”

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Mounting Ha rdwa re Sc rews. It is rec omended tha t the top hole of the ra dia tor swing a rm be used using inc luded

mounting ha rdwa re sc rews in this insta ll.

Pull CAT-5 and Coaxial cables through (if necessary)

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Determine correct angle

Determine c orrec t a ngle setting to use for the ra dia tor using the design guide, see pa ge 13 of design guide.

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LA-140 – Mounting your Radiator

Attach Radiator to Wall Box Plate using Tilt Arm “A” and Tilt Arm “B”

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ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the c orrec t angle is selec ted

before fully tightening Tilt Bolt.

Attach Safety Mounting Cable

The ra dia tor ha s a sa fety c a ble a tta c hed to the top of the swing a rm. This c a ble must be a tta c hed to a sec ure ba se

to prevent the ra dia tor from fa lling in the event of a mounting ha rdwa re c omponent fa iling. Possible injury to persons

a nd da ma ge to the ra dia tor is prevented by sec urely a tta c hing this c a ble to a ba se.

Connect CAT-5 and Coaxial cables

C onnec t C AT-5 a nd C oa xia l c a bles to a ppropria te loc a tions on ra dia tor.

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LA-140 – Mounting your Radiator

Desk/Table Mounting

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non-perma nent mounting stra tegy.

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• Tilt Arm “A”

8QLYHUVDOꢁ%UDFNHW

7LOWꢁ%ROW

‡ꢁ7LOWꢁ$UPꢁ´%µ

‡ꢁ7LOWꢁ%ROW

• Mounting Ha rdwa re Sc rews

Mounting Ha rdwa re Sc rews

Installation Steps

Tilt Arm “A”

7LOWꢁ$UPꢁ´%µ

Attach Tilt Arm “A”

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WRꢁHLWKHUꢁVLGHꢁRIꢁWKHꢁ8QLYHUVDOꢁ%DUFNHWꢀ

Attach Tilt Arm “B”

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Sc rews. The bottom hole in Swing Arm must be used for this insta ll.

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LA-140 – Mounting your Radiator

Determine correct angle

Determine c orrec t a ngle setting to use for the ra dia tor using the design guide, see pa ge 13 of design guide.

Attach Radiator to Desk/Mic Stand

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ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the c orrec t angle is selec ted

before fully tightening Tilt Bolt.

Connect CAT-5 and Coaxial cables

C onnec t C AT-5 a nd C oa xia l c a bles to a ppropria te loc a tions on ra dia tor.

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LA-140 – Mounting your Radiator

Microphone Stand Mounting

Ra dia tor is mounted on a sta nda rd mic rophone sta nd.

3LHFHVꢁ8VHGꢄ

‡ꢁ8QLYHUVDOꢁ%UDFNHW

• Universa l Sta nd Nut

• Tilt Arm “A”

8QLYHUVDOꢁ%UDFNHW

7LOWꢁ%ROW

Universa l Sta nd Nut

‡ꢁ7LOWꢁ$UPꢁ´%µ

‡ꢁ7LOWꢁ%ROW

Installation Steps

Mounting Ha rdwa re Sc rews

Tilt Arm “A”

7LOWꢁ$UPꢁ´%µ

Attach Universal Bracket to Mic Stand

$WWDFKꢁ8QLYHUVDOꢁ%UDFNHWꢁWRꢁ0LFꢁ6WDQGꢁXVLQJꢁ8QLYHUVDOꢁ6WDQGꢁ1XWꢀ

Mic rophone sta nd

Attach Tilt Arm “A”

$WWDFKꢁ7LOWꢁ$UPꢁ´$µꢁWRꢁ8QLYHUVDOꢁ%UDFNHWꢁXVLQJꢁLQFOXGHGꢁ0RXQWLQJꢁ+DUGZDUHꢁ6FUHZVꢀꢁ7LOWꢁ$UPꢁ´$µꢁFDQꢁEHꢁDWWDFKHGꢁWRꢁ

HLWKHUꢁVLGHꢁRIꢁWKHꢁ8QLYHUVDOꢁ%DUFNHWꢀ

Attach Tilt Arm “B”

$WWDFKꢁ7LOWꢁ$UPꢁ´%µꢁWRꢁ6ZLQJꢁ$UPꢁRIꢁUDGLDWRUꢁꢏVZLQJꢁDUPꢁFRPHVꢁDWWDFKHGꢁWRꢁUHDUꢁRIꢁUDGLDWRUꢐꢁXVLQJꢁLQFOXGHGꢁ0RXQWLQJꢁ

Ha rdwa re Sc rews. The bottom hole in Swing Arm must be used for this insta ll.

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LA-140 – Mounting your Radiator

Determine correct angle setting

Determine c orrec t a ngle setting to use for the ra dia tor using the design guide, see pa ge 13 of design guide.

Attach Radiator to Desk/Mic Stand

$WWDFKꢁ5DGLDWRUꢁWRꢁ'HVNꢑ0LFꢁ6WDQGꢁXVLQJꢁ7LOWꢁ$UPꢁ´$µꢁDQGꢁ7LOWꢁ$UPꢁ´%ꢀµꢁ8VHꢁWKHꢁ7LOWꢁ%ROWꢁWRꢁIDVWHQꢁWKHꢁWLOWꢁ

a rms together.

ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the c orrec t angle

is selec ted before fully tightening Tilt Bolt.

Connect CAT-5 and Coaxial cables

C onnec t C AT-5 a nd C oa xia l c a bles to a ppropria te loc a tions on ra dia tor.

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LA-140 – Mounting your Radiator

Tripod Stand Mounting

Ra dia tor is mounted on a tripod sta nd. If Listen pa rt number LA-337 is used the ra dia tor c a n be

mounted up to nine feet high.

3LHFHVꢁ8VHGꢄ

8QLYHUVDOꢁ%UDFNHW

• Universa l Sta nd Nut

‡ꢁ8QLYHUVDOꢁ%UDFNHW

• Tilt Arm “A”

Universa l Sta nd Nut

7LOWꢁ%ROW

‡ꢁ7LOWꢁ$UPꢁ´%µ

‡ꢁ7LOWꢁ%ROW

• Mounting Ha rdwa re Sc rews

Mounting Ha rdwa re Sc rews

Tilt Arm “A”

7LOWꢁ$UPꢁ´%µ

Installation Steps

Attach Universal Bracket to tripod stand

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Tripod

Attach Tilt Arm “A”

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LA-140 – Mounting your Radiator

Attach Tilt Arm “B”

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ha rdwa re sc rews. The bottom hole in Swing Arm must be used for this insta ll.

Determine correct angle

Determine c orrec t a ngle setting to use for the ra dia tor using the design guide, see pa ge 13 of design guide.

Attach Radiator to Desk/Mic Stand

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ATTENTION: Note the angle measurements on Tilt Arm “B” and verify that the c orrec t angle is selec ted

before fully tightening Tilt Bolt.

Connect CAT-5 and Coaxial cables

C onnec t C AT-5 a nd C oa xia l c a bles to a ppropria te loc a tions on ra dia tor.

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LA-140 – Mounting your Radiator

Dual Radiator Mounting

It is possible to mount two Listen LA-140 Ra dia tors either side by side or on top of ea c h other using the

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the previous sc enerios exc ept you will be working with two ra dia tors c onnec ted together. The instruc -

tions for c onnec ting two ra dia tors together with the LA-342 bra c ket a re inc luded with the bra c ket. Af-

ter the two ra dia tors a re c onnec ted together a ll of the a bove instruc tions a re the sa me exc ept when

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the dua l mounting bra c ket.

Vertic a l

Horizonta l

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Ac c essories for LA-140

$FFHVVRULHV

LA-205

IR Extended Power Supply

(powers two LA-140 ra dia tors)

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a re using more tha n two LA-140

ra dia tors per LT-82 tra nsmitter or if you

wish to remote power the ra dia tor(s).

LA-342

IR 'XDOꢁ5DGLDWRUꢁ0RXQWLQJꢁ%UDFNHWꢁ

(for mounting two ra dia tors

LA-70

vertic a lly or horizonta lly)

-inc ludes RG -58 c oa xia l c a ble a nd C AT-5 c a ble to

interc onnec t the two ra dia tors

C AT-5 C a ble

spec ify length

LA-127

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LA-115

LA-112

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%1&ꢁ&RXSOHU

RG -58 50 Ohm C oa xia l C a ble

spec ify length

LA-71

LA-391

LA-72

RJ-45 C AT-5 C onnec tor

RG -58/50 Ohm C oa xia l C a ble

RJ-45 to RJ-45 C AT-5 C oupler

(Pkg. of 10)

prea ssembled, spec ify length

LA-393

RJ-45/C AT-5

prea ssembled, spec ify length

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Notes

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Notes

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LR-42/44 User’s Manual Table of Contents

LR-42/LR-44 4-C ha nnel IR Rec eivers

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LR-42 Quic k Referenc e Pa ge

LR-44 Quic k Referenc e Pa ge

Setup Instruc tions

Opera ting Instruc tions

Loc king Instruc tions

101

102

107

110

ꢊꢊꢊ

115

Progra mming Instruc tions

Progra mming Exa mples

Progra mma ble Fea tures Deta iled Desc riptions

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Ac c essories for LR-42/LR-44

LR-42/44 Pac kage Contents

• LR-42 IR Stethosc ope 4-C ha nnel Rec eiver (or)

LR-44 IR La nya rd 4-C ha nnel Rec eiver

• Quic k Referenc e C a rd

LR-42

LR-44

Listen Part Number

• LR-42

• LR-44

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The IR stethosc ope rec eiver sha ll be c a pa ble of rec eiving on four c a rriers (2.3, 2.8, 3.3, 3.8

MHz) a nd the c ha nnel sha ll be displa yed on one of four front pa nel LEDs. The rec eiver sha ll

be c a pa ble of being loc ked on a c ha nnel. The rec eiver sha ll be c a pa ble of rec eiving a

stereo signa l on ea c h of the four c a rriers. The rec eiver sha ll ha ve a SNR of 60 db or grea ter

a nd ha ve built in squelc h c ontrol. The devic e sha ll ha ve a n a udio frequenc y response of

63 Hz to 15 kHz, +/- 3db a nd sha ll ha ve distortion of less tha n 2%. The devic e sha ll opera te

for 30 hours with two AAA a lka line ba tteries a nd 15 hours with two AAA NiMH rec ha rgea ble

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Speciﬁcations

Carrier Frequencies

LR-42

Selectable: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz

Number of Channels

IR Detectors

Four (4) selectable channels

Two (2) detectors under front IR lens

Sensitivity

One (1) nW/cm2 at 40 db SNR

Frequency Accuracy

Squelch

+/- .005% stability 0 to 50C

Automatic on loss of RF signal (40 db SNR)

FCC Part 15, Industry Canada, CE, RoHS

Compliance

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

System Frequency Response

63Hz - 15kHz (+/- 3dB)

Mono: >60dB

System Signal to Noise Ratio

(A-weighted)

Audio

Stereo: >52dB

System Distortion

Audio Output Jacks

Audio Output Power

<2% total harmonic distortion (THD)

3.5 mm connector unbalanced, mono or stereo headphones

20 mW maximum at 32 ohms

User Controls

Programming

Volume, Power, Channel Select

Controls

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

Unit Power

Indicated by current channel selection LED

Indicators

Channel Selection

Red LED illuminates on the current channel selection

Battery Type

Battery Life

Two (2) AAA alkaline batteries or NiMH battery pack

30 hours alkaline, 15 hours NiMH rechargeable pack

(LA-364)

Power

Battery Charging

Fully Automatic with NiMH battery pack and LA-350 charger

Dimensions (H x W x D)

Color

1.8 x 4.0 x .75 in (46x102x19 mm) Stethoscope Arm length 8 in (203 mm)

Grey with White Silk Screening

1.75 oz. (49 g)

Unit Weight without batteries

Unit Weight with batteries

Physical

2.55 oz. (74 g)

Shipping Weight

8.00 oz. (227 grams)

Temperature - Operation

Temperature - Storage

Humidity

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

Environmental

-20 C (-4 F) to +50 (122 F)

0 to 95% relative humidity, non-condensing

•Speciﬁcations are subject to change without notiﬁcation.

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The La nya rd IR Rec eiver sha ll be c a pa ble of rec eiving on four c a rriers (2.3, 2.8, 3.3, 3.8 MHz)

a nd the c ha nnel sha ll be displa yed on one of four front pa nel LEDs. The rec eiver will a c c ept

mono or stereo ea rphones with a 3.5 mm c onnec tor. The rec eiver sha ll be c a pa ble of being

loc ked on a c ha nnel. The rec eiver sha ll be c a pa ble of rec eiving a stereo signa l on ea c h of

the four c a rriers. The rec eiver sha ll ha ve a SNR of 60 db or grea ter a nd ha ve built in squelc h

c ontrol. The devic e sha ll ha ve a n a udio frequenc y response of 63 Hz to 15 kHz, +/- 3db a nd

sha ll ha ve distortion of less tha n 2%. The devic e sha ll opera te for 30 hours with two AAA

a lka line ba tteries a nd 15 hours with two AAA NiMH rec ha rgea ble ba tteries. The rec eiver sha ll

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Speciﬁcations

LR-44

Selectable: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz

Four (4) selectable channels

Carrier Frequencies

Number of Channels

IR Detectors

Two (2) detectors under front IR lenss

One (1) nW/cm2 at 40 db SNR

Sensitivity

Frequency Accuracy

Squelch

+/- .005% stability 0 to 50C

Automatic on loss of RF signal (40 db SNR)

FCC Part 15, Industry Canada, CE, RoHS

Compliance

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

System Frequency Response

63Hz - 15kHz (+/- 3dB)

System Signal to Noise Ratio

(A-weighted)

Mono: >60dB

Audio

Stereo: >52dB

System Distortion

Audio Output Jacks

Audio Output Power

<2% total harmonic distortion (THD)

3.5 mm connector unbalanced, mono or stereo headphones

20 mW maximum at 32 ohms

User Controls

Programming

Volume, Power, Channel Select

Controls

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

Unit Power

Indicated by current channel selection LED

Indicators

Channel Selection

Red LED illuminates on the current channel selection

Battery Type

Battery Life

Two (2) AAA alkaline batteries or NiMH battery pack

30 hours alkaline, 15 hours NiMH rechargeable pack

(LA-364)

Power

Battery Charging

Fully Automatic with NiMH battery pack and LA-350 charger

Dimensions (H x W x D)

Color

1.80 x 4.00 x 0.75 in. (46 x 102 x 19 mm)

Grey with White Silk Screening

1.75 oz. (49 g)

Physical

Unit Weight without batteries

Unit Weight with batteries

Shipping Weight

2.55 oz. (74 g)

8.00 oz. (227 g)

Temperature - Operation

Temperature - Storage

Humidity

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

Environmental

-20 C (-4 F) to +50 (122 F)

0 to 95% relative humidity, non-condensing

•Speciﬁcations are subject to change without notiﬁcation.

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LR-42 Quic k Referenc e

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Spea kers loc a ted in ends of stetho

a rms, pla c e in ea rs to listen to a udio

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Displa ys whic h c ha nnel the

unit is c urrently tuned to. Also

c a n displa y ba ttery level, etc .

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IR rec eiving c omponents, ensure

entire lens is visible during use

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Use to a djust volume

level in spea ker(s)

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Press to turn unit on, press

a nd hold to turn unit off

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Press to c ha nge the

c ha nnel, a lso used with

progra mming func tion

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LR-44 Quic k Referenc e

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Holds rec eiver in pla c e

below c hin of wea rer

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Displa ys whic h c ha nnel the

unit is c urrently tuned to.

Also c a n displa y ba ttery

level, etc .

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IR rec eiving c omponents, ensure

entire lens is visible during use

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Use to a djust volume

level in spea ker(s)

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Press to turn unit on, press

a nd hold to turn unit off

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Press to c ha nge the

c ha nnel, a lso used with

progra mming func tion

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Adjust the loop size of the

la nya rd by pulling on this

ba ll (usua lly done a fter

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Ac c epts a ny ea rpiec e with a

3.5 mm TRS c onnec tor.

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LR-42/44 Setup Instruc tions

Unpack the Product

Remove outer pa c ka ging a nd pla stic c over. Verify a ll c omponents a re

present a nd tha t no physic a l da ma ge ha s oc c urred to the produc t.

Determine Battery Type to be Used

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of unit using the following proc ess (purc ha se Listen pa rt number LA-363).

Remove alkaline battery compartment

Press down on c ompa rtment a nd push towa rds the bottom of unit.

Model: 4-Channel IR Receiver

FCC: This device complies with Part 15 of the FCC Rules.

IC: This Class A digital apparatus complies with Canadian ICES-003.

Listen Support: 800.330.0891

801.233.8992, www.listentech.com

Open battery compartment

Open by pulling into two piec es using the grips on the top of the c ompa rtment.

G rips

Install batteries

Insert two AAA a lka line ba tteries in c ompa rtment noting pola rity.

Close battery compartment

Sna p the two c ompa rtment piec es ba c k together.

Return battery compartment to rear of receiver.

Pla c e ba ttery c ompa rtment on rea r of rec eiver.

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LR-42/44 Setup Instruc tions

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IMPORTANT: Do not install AAA NiMH batteries in inc luded alkaline battery pac k bec ause the batteries will

not c harge in this pac k, only use a Listen provided sealed battery pac k (LA-364) for battery

c harging.

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Remove alkaline battery compartment

Remove a lka line ba ttery c ompa rtment by pressing down on c ompa rtment a nd pushing

towa rds the bottom of unit. Store a lka line ba ttery pa c k for la ter use if desired.

Model: 4-Channel IR Receiver

FCC: This device complies with Part 15 of the FCC Rules.

IC: This Class A digital apparatus complies with Canadian ICES-003.

Listen Support: 800.330.0891

801.233.8992, www.listentech.com

Place LA-364 battery pack in receiver

Pla c e LA-364 ba ttery pa c k in rec eiver. The unit will now rec ognize the rec ha rgea ble

ba tteries a nd c ha rge them c orrec tly when unit is pla c ed in a c ha rging c a se (LA-350).

Model: 4-Channel IR Receiver

FCC: This device complies with Part 15 of the FCC Rules.

IC: This Class A digital apparatus complies with Canadian ICES-003.

Listen Support: 800.330.0891

801.233.8992, www.listentech.com

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LR-42/44 Setup Instruc tions

Connect an Earphone or Headset (LR-44 model only)

An ea rphone or hea dset will c onnec t to the ja c k on the bottom of the unit. Either mono or

stereo c onnec tors ma y be used with Listen rec eivers. Ma ke sure to push the c onnec tor a ll

the wa y into the ja c k.

Turn Unit On

Turn the unit on by pressing either button on the front of the unit.

ATTENTION 1: The LR-44 model must have a headset c onnec ted to the unit to turn on and

remain on for longer than ten sec onds.

ATTENTION 2: If using a new LA-364 NiMH battery pac k the batteries may need to be put

through one c harge c yc le before they will turn the unit on.

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LR-42/44 Setup Instruc tions

Select a Channel and/or Program Channel Selection Method

The Selec t button is used to c ha nge the c ha nnel. Press the button onc e to c ha nge the c ha nnel. The

unit will either seek or sc roll through the c ha nnels depending upon whic h c ha nnel selec tion method you

ha ve ena bled. See below for desc ription of possible c ha nnel selec tion methods.

Upon Power up

When set to fa c tory defa ults the unit will turn on to the la st c ha nnel is wa s tuned to upon

power up. However, the unit c a n be progra mmed to c ontinuously seek for a c ha nnel with

signa l upon power up until one is found (Auto-Seek). See pa ge 102 for more progra mming

informa tion.

Single Channel Systems

If you know wha t c ha nnel the unit will be used on, a nd you know tha t there is only one

c ha nnel tha t the unit will need to be used on, you c a n loc k it onto tha t c ha nnel now.

See pa ge 101 for c ha nnel loc k informa tion.

5C Multiple Channel Systems

In systems tha t require the rec eivers to be a ble to a c c ess more tha n one c ha nnel you

must dec ide whic h type of c ha nnel selec tion method you wa nt ena bled. The defa ult

setting is tha t ea c h time you press the Selec t button the unit will sc roll to the next

c ha nnel. If you wa nt the rec eiver to a utoma tic a lly begin seeking for a nother c ha nnel

when the signa l is lost (suc h a s wa lking from room to room in a museum) the Auto-Seek

func tion must be ena bled. See pa ge 102 for more informa tion.

Select Stereo/Mono Mode

If the rec eiver will be rec eiving a mono signa l (stereo mode is not ena bled on LT-82) no a c tion is required a s

Mono Mode is the defa ult setting. However, if the rec eiver will be rec eiving a stereo signa l the rec eiver must be

set to Stereo Mode to func tion properly.

Setup Additional Programming (if desired)

Additiona l progra mming options, in a ddition to the Auto-Seek a nd Stereo/Mono Mode func tions desc ribed

a bove, a re the C ha nnel Loc k-out a nd Squelc h setting. See pa ge 102 for a c omplete expla na tion of the

progra mming func tions for the rec eiver.

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LR-42/44 Operating Instruc tions

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have been enabled/disabled, with the fac tory default settings highlighted. See page 102 for detailed

information about programming and operating units using non-default settings.

Connect an Earphone or Headset (LR-44 Model Only)

An ea rphone or hea dset will c onnec t to the ja c k on the bottom of the unit. Either mono or stereo

c onnec tors ma y be used with Listen rec eivers. Ma ke sure to push the c onnec tor a ll the wa y into the ja c k.

Position the Unit on User’s Body

ATTENTION: If desired, this step c an be done after turning the unit on and selec ting a c hannel as long as

the front of the rec eiver is not obstruc ted during the c hannel selec tion proc ess.

IMPORTANT: Always wear the rec eiver in suc h a way that there is nothing c overing the front lens of the

rec eiver. If the front lens is c overed or obstruc ted the rec eiver will have very poor range.

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LR-42/44 Operating Instruc tions

LR-42

Position the rec eiver so the stethosc ope a rm tips rest in the ea r holding the unit below the

c hin of the user.

LR-44

Position the la nya rd a round the nec k holding the unit below the c hin of the user. If desired,

pull on the la nya rd a djustment ba ll to dec rea se the size of the la nya rd loop (bringing the

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c ord a bove the point it pa sses through the rec eiver.

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LR-42/44 Operating Instruc tions

Turn the Unit On

Turn on the unit by pressing either button on the front of the rec eiver.

ATTENTION 1: The LR-44 model must have a headset c onnec ted to the unit to turn

on and remain on for longer than ten sec onds.

ATTENTION 2: If using a new LA-364 NiMH battery pac k the batteries may need to

be put through one c harge c yc le before they will turn the unit on.

Auto-Seek Disabled (Default OFF)

The unit will power up to the sa me c ha nnel tha t it wa s on when it wa s la st turned off.

Auto-Seek Enabled

The unit will power up to the sa me c ha nnel tha t it wa s on when it wa s la st turned off. If

no signa l is present on tha t c ha nnel it will seek for a c ha nnel with signa l present. If none is

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its c ha nnel this loc k will override Auto-Seek

To turn the unit off press a nd hold the PWR button for 1.5 sec onds.

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LR-42/44 Operating Instruc tions

LED Sleep Mode

The rec eiver will shut off the c ha nnel indic a tor LEDs a fter a period of 10 sec onds pa sses without a ny

buttons being pressed. The rec eiver will still produc e a udio a nd the volume c a n still be a djusted,

only the LEDs shut down. It will be nec essa ry to “wa ke up” the rec eiver by ta pping either the PWR or

Selec t button before doing ma ny of the opera ting ta sks desc ribed in the next sec tions.

Select Listening Channel

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Auto-Seek Disabled (Default OFF)

Press the Selec t button to sc roll through the four c ha nnels. If the c ha nnel indic a tor LED

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loc ked on the c urrent c ha nnel. See pa ge 101 for c ha nnel loc k informa tion. Also, if the

unit “skips” over the desired c ha nnel it is bec a use tha t c ha nnel ha s been loc ked out. See

pa ge 102 for more informa tion a bout the progra mma ble fea tures.

Auto-Seek Enabled

The unit will c ontinuously seek for a signa l until one is found a nd then it will sta y on tha t

c ha nnel. If the signa l is not detec ted for a short time period, or the user presses the SEL but-

ton, the unit will seek for a nother signa l a nd will keep seeking until a signa l is detec ted. If,

however, the unit is loc ked on the c urrent c ha nnel this loc k will “override” Auto-Seek a nd

the unit will not c ha nge c ha nnels when the signa l is lost. Also, if there a re c ha nnels tha t

ha ve been loc ked out in the C ha nnel Loc k Out mode the Auto-Seek will not stop on these

c ha nnels. See pa ge 102 for more informa tion.

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LR-42/44 Operating Instruc tions

Adjust Volume Level

Use the c ontrol dia l on the top of the unit to a djust the volume to a c omforta ble level.

Checking Battery Level and Current Channel

Checking Battery Level

Ta pping the power button will displa y the ba ttery level on the c ha nnel indic a tor LEDs.

When a ba ttery c hec k is initia ted a ll four LEDs will turn on. Then the LEDs will ra mp down to the

c urrent ba ttery level. If a ll four LEDs turn on a nd rema in on the ba tteries a re full.

The ba ttery level will then displa y on the c ha nnel indic a tor LEDs for two sec onds (unless ba ttery

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UHSUHVHQWVꢁDSSUR[LPDWHO\ꢁꢍꢆꢔꢁRIꢁWKHꢁEDWWHU\·VꢁFDSDFLW\ꢀꢁꢏVHHꢁFKDUWꢁEHORZꢐꢀ

LED on

LED off

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LR-42/44 Operating Instruc tions

Checking Current Channel

The c ha nnel the unit is c urrently on is represented by the c orresponding LED in the c ha nnel

indic a tor LEDs being lit (unless unit is in LED sleep mode). To c hec k whic h c ha nnel the unit is on

without c ha nging the c urrent c ha nnel while the unit is in LED sleep mode, press either the PWR or

Selec t button onc e. This will turn the c ha nnel indic a tor LEDs ba c k on for 10 sec onds.

Auto Shut-Oﬀ Feature

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After 10 seconds

After 10 sec onds if there is no hea dset plugged into the hea dset ja c k (LR-44 model only).

This a llows for a quic k ba ttery sta tus c hec k without ha ving to plug in a hea dset.

This func tion is a lso disa bled while in Progra m Mode.

After 30 minutes

After 30 minutes if no signa l is detec ted by the rec eiver (both models).

Powering down the unit

To power down the unit press a nd hold the PWR button for 1.5 sec onds. All of the LEDs will light up

momenta rily a nd then turn off signa ling power ha s been shut off.

100

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LR-42/44 Loc king Instruc tions

Locking the Receiver on One Channel

The unit c a n be elec tronic a lly loc ked on one c ha nnel so tha t it will not c ha nge c ha nnel even if the Selec t button is

pressed. It is rec ommended to loc k the rec eivers on the c ha nnel tha t is being used in systems tha t do not require the user

to c ha nge c ha nnels (single c ha nnel systems).

Channel Lock Procedure

The unit c a n be elec tronic a lly loc ked on the c ha nnel it is c urrently on using the following proc ess.

Selec t the c ha nnel tha t you wa nt to loc k the unit on.

Wa it until the unit enters LED sleep mode. LED sleep mode begins when the unit extinguishes

the c ha nnel indic a tor LED whic h will ha ppen 10 sec onds a fter the la st button is pressed.

Onc e in LED sleep mode, press a nd hold both the Selec t a nd Power buttons for three sec onds.

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a nd Selec t buttons.

Channel Unlock Procedure

The proc edure for unloc king the unit is the sa me a s loc king the unit.

Lock Indicators

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ZLOOꢁÁDVKꢁIRXUꢁWLPHVꢁDQGꢁWKHꢁXQLWꢁZLOOꢁQRWꢁFKDQJHꢁFKDQQHOVꢀꢁ)ROORZꢁWKHꢁORFNꢑXQORFNꢁSURFHGXUHꢁVKRZQꢁDERYHꢁ

to be a ble to c ha nge the c ha nnel.

101

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LR-42/44 Programming Instruc tions

Program Mode Overview

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Auto Seek a nd Squelc h. The following sec tions outline the proc edures required to enter the progra m mode,

modify the progra mma ble fea tures a nd exit the progra m mode. There a re a lso severa l exa mples of how to

use the progra m mode to c ha nge the settings of the rec eiver. La stly, the end of this progra mming sec tion

provides a deta iled desc ription a bout ea c h progra mma ble fea ture a nd when they c a n or should be used.

Entering Program Mode

Ma ke sure tha t the unit is off (not just in LED sleep mode).

Press a nd hold the Power a nd Selec t buttons for three sec onds.

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fea tures, the Stereo On/Off func tion.

While in Program Mode

The C ha nnels 1, 2 a nd 3 LED indic a tors a re used to displa y whic h progra mma ble fea ture

is c urrently selec ted.

The C ha nnel 4 LED indic a tor shows whether the Stereo On/Off a nd Auto-Seek fea tures

a re ena bled or disa bled. If the C ha nnel 4 LED is on these fea tures a re ena bled.

Press the Selec t button to a dva nc e to the next progra m mode fea ture.

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Ena ble or disa ble the Stereo On/Off a nd Auto-Seek Fea tures (or),

Enter the progra m “sub-mode” required to a djust the C ha nnel Loc k-Out a nd Squelc h fea tures.

102

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LR-42/44 Programming Instruc tions

Program Mode Functionality Diagram

Use this c ha rt to help with na viga ting through, a nd a djusting the fea tures within, the progra m mode.

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3URJUDPPDEOHꢀ

5HFHLYHUꢀ/('ꢀ'LVSOD\ꢀ6KRZV

Pressing the

6HOHFWꢁ%XWWRQ

Feature

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Toggles Stereo On/Off. LED 4

Stereo On/Off

Adva nc es to Fea ture 2

Adva nc es to Fea ture 3

illumina ted indic a tes stereo is ON

GHIDXOWꢁꢄꢁRII

Enters C ha nnel Loc k-Out

“Sub-Mode” (See next pa ge for

instruc tions)

C ha nnel Loc k-Out

Toggles Auto Seek On/Off. LED 4

illumina ted indic a tes

Auto-Seek

Adva nc es to Fea ture 4

Auto-Seek is ON

GHIDXOWꢁꢄꢁRII

Enters Squelc h Adjustment

“Sub-Mode”

Squelc h

Adva nc es to Fea ture 5

Adva nc es to Fea ture 6

Adva nc es to Fea ture 7

Returns to Fea ture 1

(See pa ge 105)

No Func tion

8QLWꢁÁDVKHVꢁDOOꢁ/('·VꢁꢅꢁWLPHVꢁ

indic a ting reset a nd then

the unit shuts off

Reset to Defa ults

Exit Progra m Mode

Exits Progra m Mode a nd returns to

sta nda rd opera ting mode

LED on

LED off

103

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LR-42/44 Programming Instruc tions

Channel Lock-Out “Sub-Mode” Instructions

While in Channel Lock-Out “Sub-Mode”

The c ha nnels tha t would be a va ila ble a re represented by the c orresponding c ha nnel

indic a tor LED being on a nd the c ha nnels tha t would be “loc ked out” a re represented

by the c ha nnel indic a tor LED being off.

Press the Selec t button to a dva nc e to the next c ha nnel(s) a c tive c ombina tion.

Press the Power button to sa ve the selec ted c ha nnel(s) a c tive c ombina tion, a nd return to regula r

mode (the Auto-Seek func tion will be the selec ted fea ture).

Channel Lock-Out “Sub-Mode” Functionality Diagram

Use this c ha rt to help with na viga ting through, a nd a djusting the c ha nnels a c tive, within the C ha nnel Loc k-Out “Sub-Mode”.

Na viga ting within the C ha nnel Loc k-Out “Sub-Mode”

C ha nnels

Ac tive

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3UHVVLQJꢁWKHꢁ6HOHFWꢁ%XWWRQ

3UHVVLQJꢁWKHꢁ3RZHUꢁ%XWWRQ

1,2

1,3

2,3

1,2,3

Adva nc es to the next

c ha nnel(s) a c tive

c ombina tion

Sa ves the selec ted c ha nnel(s) a c tive

c ombina tion a nd returns to regula r

progra m mode

1,4

2,4

1,2,4

3,4

1,3,4

2,3,4

1,2,3,4

(defa ult)

LED off

LED on (channel active)

104

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LR-42/44 Programming Instruc tions

Squelch Adjustment “Sub-Mode” Instructions

While in Squelch Adjustment “Sub-Mode”

There a re 16 a va ila ble squelc h settings. The 16 settings a re represented by bina ry c ode

(refer to the c ha rt below).

Press the Selec t button to a dva nc e to the next possible squelc h setting.

Press the Power button to sa ve the selec ted squelc h setting, a nd return to regula r progra m mode.

Squelch Adjustment “Sub-Mode” Functionality Diagram

Use this c ha rt to help with na viga ting through, a nd a djusting the c ha nnels a c tive, within the Squelc h Adjustment “Sub-Mode”.

Na viga ting within the Squelc h Adjustment “Sub-Mode”

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Squelc h

Setting

Squelc h

5HFHLYHUꢁ/('ꢁ'LVSOD\ꢁ6KRZVꢄ

(defa ult)

Sa ves the selec ted squel-

Adva nc es to the next

c h setting a nd returns to

squelc h setting

regula r progra m mode

LED off

LED on

105

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LR-42/44 Programming Instruc tions

Resetting to Defaults

It is possible to reset the unit to fa c tory defa ult settings a nd the unit must be in the progra m mode to be reset.

While in progra m mode, selec t the “Reset to Defa ults” func tion a nd press the power button.

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Exiting Program Mode

There are two ways to exit the program mode

Wa it 10 sec onds without pressing a button (a ny c ha nges ma de a re sa ved.)

Use the Selec t button to sc roll through the progra m mode func tions until the “Exit Progra m Mode”

func tion is selec ted a nd then press the Power button.

106

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Programming Examples

Example #1

I want to turn on/oﬀ the Stereo Mode function and then exit program mode

Enter Progra m Mode (see pa ge 102)

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Using the func tiona lity c ha rt on a previous pa ge note tha t this is the Stereo On/Off Func tion.

Note tha t the c ha nnel 4 LED indic a tes whether or not this func tion is on/off.

Press the power button to turn Stereo Mode on/off.

Exit Progra m Mode.

Example #2

I want to turn on/oﬀ the Stereo Mode function and the Auto-Seek Function and then

exit program mode.

Enter Progra m Mode

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Using the func tiona lity c ha rt on a previous pa ge note tha t this is the Stereo On/Off Func tion.

Note tha t the c ha nnel 4 LED indic a tor represents whether or not this func tion is on/off.

Press the power button to turn Stereo Mode on/off.

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Using the c ha rt on a previous pa ge note tha t this is the Auto-Seek Func tion.

Aga in, note tha t the c ha nnel 4 LED indic a tes whether this func tion is on/off.

Press the power button to turn Auto-Seek on/off.

Exit Progra m Mode.

107

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Programming Examples

Example #3

I want to lock-out channels 2 and 3 using the Channel Lock-Out Function.

Enter Progra m Mode.

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Using the func tiona lity c ha rt on a previous pa ge note tha t this is the Stereo On/Off Func tion.

3UHVVꢁWKHꢁ6HOHFWꢁEXWWRQꢁRQFHꢁVRꢁWKHꢁ/('·VꢁVKRZꢁ

Note tha t this is the C ha nnel Loc k-Out func tion.

Press the Power button to enter the C ha nnel Loc k-Out “Sub-Mode”.

8SRQꢁHQWU\ꢁWRꢁWKHꢁ&KDQQHOꢁ/RFNꢋ2XWꢁ´6XEꢋ0RGHµꢁWKHꢁ/('·VꢁZLOOꢁVKRZꢁZKLFKꢁFKDQQHOVꢁDUHꢁFXUUHQWO\ꢁ

DFWLYHꢁꢏLIꢁWKHꢁXQLWꢁLVꢁDWꢁGHIDXOWꢁVHWWLQJVꢁDOOꢁIRXUꢁ/('·VꢁZLOOꢁEHꢁRQꢁLQGLFDWLQJꢁWKDWꢁDOOꢁFKDQQHOVꢁDUHꢁDFWLYHꢐꢀꢁꢁ

Press the Selec t button to sc roll through the 15 possible c ombina tions of a c tive/loc ked out c ha nnels

until the unit displa ys.

Press the Power button to sa ve this setting a nd return to regula r progra m mode.

Exit Progra m Mode.

Example #4

I want to reset the unit to factory defaults.

Enter Progra m Mode.

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Using the func tiona lity c ha rt on a previous pa ge note tha t this is the Stereo On/Off Func tion.

3UHVVꢁWKHꢁ6HOHFWꢁ%XWWRQꢁÀYHꢁWLPHVꢁXQWLOꢁWKHꢁXQLWꢁGLVSOD\V

3UHVVꢁWKHꢁ3RZHUꢁ%XWWRQꢁWRꢁUHVHWꢁWKHꢁXQLWꢀ

7KHꢁXQLWꢁZLOOꢁÁDVKꢁWKHꢁIRXUꢁ/('·VꢁWKUHHꢁWLPHVꢁDQGꢁWKHQꢁVKXWꢁGRZQꢀꢁ,WꢁZLOOꢁEHꢁQHFHVVDU\ꢁWRꢁPDQXDOO\ꢁWXUQꢁ

the unit ba c k on a fter a reset.

108

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Programming Examples

Example #5

I want to tighten the squelch setting to setting 10.

Enter Progra m Mode.

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Using the func tiona lity c ha rt on a previous pa ge note tha t this is the Stereo On/Off Func tion.

3UHVVꢁWKHꢁ6HOHFWꢁEXWWRQꢁWKUHHꢁWLPHVꢁVRꢁWKHꢁ/('·VꢁVKRZꢁ

Note tha t this is the Squelc h Adjustment Func tion.

Press the Power button to enter the Squelc h Adjustment “Sub-Mode”.

8SRQꢁHQWU\ꢁWRꢁWKHꢁ6TXHOFKꢁ$GMXVWPHQWꢁ´6XEꢋ0RGHµꢁWKHꢁ/('·VꢁZLOOꢁVKRZꢁZKLFKꢁVTXHOFKꢁVHWWLQJꢁLVꢁ

FXUUHQWO\ꢁVHOHFWHGꢁꢏLIꢁWKHꢁXQLWꢁLVꢁDWꢁGHIDXOWꢁVHWWLQJVꢁWKHꢁXQLWꢁZLOOꢁGLVSOD\ꢁUHSUHVHQWLQJꢁDꢁVTXHOFKꢁVHWWLQJꢁÀYHꢐꢀ

Press the Selec t button to sc roll through the 16 squelc h settings until the unit displa ys.

Press the Power button to sa ve this setting a nd return to regula r progra m mode.

Exit Progra m Mode

109

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Programmable Features Detailed Desc riptions

Stereo Mode (Default is OFF)

Stereo Mode Function

This func tion must be set to ma tc h the type of signa l tha t the rec eiver is rec eiving. If the rec eiver is rec eiving a

mono signa l this func tion must be OFF. If the rec eiver is rec eiving a stereo signa l this func tion must be ON.

When to enable Stereo Mode

Stereo Mode must be ena bled if the rec eiver is rec eiving a stereo signa l from the tra nsmitter.

Channel Lock-Out (Default is All Channels Available)

Channel Lock Out function

This func tion is used to loc k out c ha nnels from being a c c essible to the user when the Selec t button

is pressed or when the unit is seeking for a c ha nnel in Auto-Seek Mode. This func tion is different

from the C ha nnel Loc k func tion in tha t this func tion removes c ha nnels from being selec ta ble

ZKHUHDVꢁWKHꢁ&KDQQHOꢁ/RFNꢁIXQFWLRQꢁKROGVꢁWKHꢁXQLWꢁRQꢁWKHꢁFXUUHQWꢁFKDQQHOꢀꢁ%\ꢁXVLQJꢁWKLVꢁSURJUDPꢁ

mode you c a n loc k out a ny c ombina tion of c ha nnels.

When to Lock Out Channels

If you ha ve Auto-Seek disa bled (defa ult setting) the unit sc rolls to the next c ha nnel with ea c h press of the

Selec t button. If, for exa mple, you ha ve a two c ha nnel system you c a n use this fea ture to “loc k out” the

other two unused c ha nnels so tha t the user will not ha ve to sc roll through them to get to the c ha nnels with

a signa l. If you ha ve Auto-Seek ena bled a nd a re using less tha n four c ha nnels, you c a n use the C ha nnel

Loc k-Out mode to ensure the rec eiver will not stop on a c ha nnel without a signa l. If, for exa mple, you a re

XVLQJꢁ$XWRꢋ6HHNꢁ0RGHꢁDQGꢁKDYHꢁWZRꢁFKDQQHOVꢁDFWLYHꢁꢏFKDQQHOVꢁRQHꢁDQGꢁIRXUꢐꢁDQGꢁÀQGꢁWKDWꢁRIWHQꢁWLPHVꢁ

when the unit seeks for c ha nnel four is stops on c ha nnel three, you would use the C ha nnel Loc k-Out Mode

to elimina te the problem.

Auto-Seek (Default is Oﬀ)

Auto-Seek function

Upon power-up with the Auto-Seek fea ture ena bled the unit will sea rc h for a c ha nnel with a signa l present. If

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seek until one is found. If the unit is on a c ha nnel with a signa l it will rema in on tha t c ha nnel until the signa l is not

detec ted for a short time a t whic h point it will a utoma tic a lly seek for a nother c ha nnel with signa l. If the Selec t

button is pressed when the unit is on a c ha nnel it will seek for the next c ha nnel with a signa l.

When to Enable Auto-Seek

It is rec ommended to ena ble the Auto-Seek fea ture in a pplic a tions where a user will be moving from one a rea

to a nother a nd does not wa nt to ha ve to ma nua lly c ha nge the c ha nnel on the rec eiver in ea c h new a rea . Also

if it is desired tha t the Selec t button a c t a s a “seek” button instea d of a ma nua l sc roll to the next c ha nnel button,

Auto-Seek should be ena bled.

Priority

If the rec eiver ha s been loc ked on a c ha nnel the loc k will ta ke priority over Auto-Seek.

Squelch Setting (Default is 3)

Squelch Setting

The purpose of squelc h is to mute the a udio output of the rec eiver when the signa l from the ra dia tor(s) is

turned off or is too wea k to be rec eived. Without squelc h you would hea r ra dio noise in your ea rphone.

The squelc h on your rec eiver c a n be a djusted so tha t it will mute a t va rying levels of signa l strength. There a re

16 settings tha t the squelc h setting c a n be set to. The lowest squelc h setting (no squelc h) is “0” a nd the

tightest squelc h setting is “15.” The defa ult setting is “3.”

When to Adjust Squelch Setting

For ma ximum ra nge the squelc h setting should be set to a low level (0, 1 or 2). However when setting the

squelc h level low the relia bility of the squelc h setting is c ompromised a nd will lea d to ra dio noise being

hea rd in the ea rphone when signa l strength is low. If no ra dio noise is desired to be hea rd the squelc h

setting should be set to a tighter position. However when setting the squelc h level high the rec eiver will

ha ve reduc ed ra nge due to the a udio being c ut-off when signa l is low. See “Progra mming Unit” sec tion

for instruc tions on how to a djust squelc h setting.

110

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LR-42/44 Battery Charging Information

Requirements

NiMH Battery Pack (LA-364)

It is not possible to c ha rge ba tteries in the a lka line ba ttery pa c k tha t c omes with the

unit. The LA-364 NiMH rec ha rgea ble ba ttery pa c k must be used.

IR 8-Unit Charging/Storage Station

The only wa y to c ha rge the LA-364 ba ttery pa c ks is by inserting them into the LA-350 C ha rging

Sta tion. The ba ttery pa c ks c a n be c ha rged while insta lled on the rec eiver or they c a n be

c ha rged while sepa ra te from the rec eiver.

How to Charge Batteries

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from the rec eiver. Within the rec eiver is the ea siest method however c ha rging the ba ttery pa c ks while they a re

sepa ra te from the rec eiver a llows for the rec eiver to be used c ontinuously while a nother set of ba tteries a re

being c ha rged for it.

Charging Batteries within the Receiver

Install LA-364 rechargeable NiMH Battery Pack

,QVWDOOꢁ/$ꢋꢅꢇꢎꢁUHFKDUJHDEOHꢁ1L0+ꢁ%DWWHU\ꢁ3DFNꢁWRꢁUHDUꢁRIꢁUHFHLYHUꢀ

Model: 4-Channel IR Receiver

FCC: This device complies with Part 15 of the FCC Rules.

IC: This Class A digital apparatus complies with Canadian ICES-003.

Listen Support: 800.330.0891

801.233.8992, www.listentech.com

111

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LR-42/44 Battery Charging Information

Place LR-42/LR-44 Receiver into a slot

Pla c e LR-42/LR-44 Rec eiver into a slot on the LA-350 c a se. Ensure tha t the LA-350

c ha rging sta tion ha s power to it.

When the unit is seated correctly a red LED will light

When the unit is sea ted c orrec tly a red LED will light up on the LA-350 c ha rging sta tion a dja c ent to the

c ha rging slot indic a ting c ha rging ha s begun.

Red LED=C ha rging in Proc ess,

G reen LED=C ha rging C omplete.

When the receiver is fully charged the green LED will light

When the rec eiver is fully c ha rged the red LED will turn off a nd a green LED will light up to indic a te unit

is fully c ha rged. The green LED will sta y lit until unit is removed from the c ha rging sta tion.

IMPORTANT: When not using your LR-42/LR-44 Rec eiver it is rec ommended to keep

the rec eiver on the c harging station. The c harging station provides a

maintenanc e c harge that will keep the battery level at 100%. If the

rec eiver is not kept on the c harger it c an lose 20% of its c harge

per month.

112

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LR-42/44 Battery Charging Information

Charging LA-364 Battery Pack Separate from the Receiver

Install Battery Pack Conversion Plates to charging tray

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inc luded with LA-350).

Place LA-364 battery pack into converted tray

Pla c e LA-364 ba ttery pa c k into c onverted tra y of LA-350. Ensure tha t the LA-350

c ha rging sta tion ha s power to it.

When the battery pack is seated correctly a red LED will light

When the ba ttery pa c k is sea ted c orrec tly a red LED will light up on the LA-350 c ha rging

sta tion a dja c ent to the c ha rging slot indic a ting c ha rging ha s begun.

Red LED=C ha rging in Proc ess,

G reen LED=C ha rging C omplete.

113

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LR-42/44 Battery Charging Information

When the battery pack is fully charged the red LED will turn oﬀ

When the ba ttery pa c k is fully c ha rged the red LED will turn off a nd a green LED

will light up to indic a te ba ttery pa c k is fully c ha rged. The green LED will sta y lit until

the ba ttery pa c k is removed from the c ha rging sta tion.

IMPORTANT: When not using your LR-42/LR-44 Rec eiver it is rec ommended to keep

the rec eiver on the c harging station. The c harging station provides a

maintanenc e c harge that will keep the battery level at 100%. If the

rec eiver is not kept on the c harger it c an lose 20% of its c harge

per month.

114

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Ac c essories for LR-42/44

$FFHVVRULHV

LA-152

LA-364

LA-150

IR Alka line ba ttery c ompa rtment

inc luded with rec eiver

Repla c ement La nya rd for LR-44

1,0+ꢁ5HFKDUJHDEOHꢁ%DWWHU\ꢁ3DFN

requires LA-350 C ha rging Sta tion

LA-350

LA-351

LA-161

6LQJOHꢁ(DUꢁ%XG

LA-151

Repla c ement Ea r Tips

(Pkg. of 20)

8-Unit IR Rec eiver

C ha rging/Stora ge Sta tion

LA-364 required

8-Unit IR Rec eiver Stora ge Sta tion

LA-162

6WHUHRꢁ(DUꢁ%XG

LA-164

Ea rspea ker

LA-165

Stereo Hea dphones

LA-166

Nec k Loop

LA-170

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115

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Notes

116

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LA-350/351 User’s Manual Table of Contents

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/$ꢋꢅꢆꢊꢁ6SHFLÀFDWLRQVꢁDQGꢁ)HDWXUHVꢁ ꢁ

LA-350 C ha rging Requirements/Instruc tions

C ord Tidy Ra c k

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121

124

LA-350 Pac kage Contents

• LA-350 C ha rging/Stora ge Sta tion

• LA-204 Power Supply

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• C ord Tidy Ra c k

• LA-350 Quic k Referenc e C a rd

LA-350

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LA-204

LA-351 Pac kage Contents

• LA-351 Stora ge Sta tion

• C ord Tidy Ra c k

LA-351

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• LA-350-01 (North Americ a )

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• LA-350-03 (Euro)

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Features

• C a n c ha rge or store up to eight LR-42 a nd/or LR-44 rec eivers a t one time.

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• Poc kets gra b a nd hold rec eivers so they will not fa ll out.

‡ꢁ&KDUJLQJꢑ6WRUDJHꢁ6WDWLRQꢁFDQꢁEHꢁPRXQWHGꢁRQꢁDꢁÁDWꢁVXUIDFHꢁRUꢁRQꢁDꢁZDOOꢀ

• C a n c ha rge ba ttery pa c ks while they a re a tta c hed to the rec eiver or while they a re

sepa ra te from the rec eiver (by use of inc luded c onversion tra y).

• La nya rd c ords a re stored without ta ngling with use of C ord Tidy Ra c k.

Speciﬁcations

RF, Safety Compliance

LA-350

FCC, Industry Canada, CE, RoHS

None

Compliance

Controls

User Controls

Bicolor LED

Indicators

Red when charging, Green when charging is complete

Type

In-line switching mode power supply, Listen part number LA-204

100-240 VAC, 47-63 Hz

Input

Output

7.5 VDC, 4 A

North America, Type B, (LA-350-01)

Asia, UK, Type G, (LA-350-02)

Euro type J, (LA-350-03)

Power Supply

Power Line Cord

Output Connector

Compliance

5.0mm x 2.1mm Barrel

UL, CE Listed

Dimensions (H x W x D)

Color

1.50 x 13.60 x 5.40 in. (38 x 345 x 137 mm)

Grey with White Silk Screening

1.2 lbs. (450 g)

Physical

Unit Weight

Shipping Weight

Mounting Options

3.0 lbs. (1.30 kg)

Desk or wall mount

Temperature - Storage

Temperature - Operation

Humidity

-20 C (-4 F) to +50 (122 F)

Environmental

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

0 to 95% relative humidity, non-condensing

•Speciﬁcations are subject to change without notiﬁcation.

123

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Features

• C a n store up to eight LR-42 a nd/or LR-44 rec eivers a t one time.

• Poc kets gra b a nd hold rec eivers so they will not fa ll out.

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• La nya rd c ords a re stored without ta ngling with use of C ord Tidy Ra c k.

Speciﬁcations

LA-351

Compliance

Controls

Power

Safety Compliance

FCC, Industry Canada, CE, RoHS

User Controls

Electrical

None

Dimensions (H x W x D)

Color

1.50 x 13.60 x 5.40 in. (38 x 345 x 137 mm)

Dark Grey with White Silk Screening

0.9 lbs. (400 g)

Physical

Unit Weight

Shipping Weight

Mounting Options

2.6 lbs. (1.10 kg)

Desk or wall mount

Temperature - Storage

Humidity

20 C (-4 F) to +50 (122 F)

Environmental

0 to 95% relative humidity, non-condensing

•Speciﬁcations are subject to change without notiﬁcation.

124

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LA-350 Charging Requirements/Instruc tions

Requirements to Charge Receivers

To c ha rge Listen LA-42 or LR-44 IR Rec eiver ba tteries you must ha ve a n LA-364 Rec ha rgea ble

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the a lka line ba ttery pa c k tha t c omes with the rec eiver. The LA-364 ba ttery pa c ks c a n be

c ha rged while a tta c hed to the rec eiver or they c a n be c ha rged sepa ra te from the rec eiver.

Model: 4-Channel IR Receiver

FCC: This device complies with Part 15 of the FCC Rules.

IC: This Class A digital apparatus complies with Canadian ICES-003.

Listen Support: 800.330.0891

801.233.8992, www.listentech.com

Charging Instructions

Plug power supply into power source

Plug power supply into power sourc e.

Plug power into charging/storage station

Plug power into c ha rging/stora ge sta tion.

125

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LA-350 Charging Requirements/Instruc tions

3 Charging Scheme

To Charge Batteries while in Receivers

Place receivers in charging slots

Pla c e rec eivers in c ha rging slots. It ma y be nec essa ry to press down on the

units to ensure tha t they a re touc hing the c ha rging c onta c ts.

To Charge Batteries separate from Receivers

Install conversion tray

Insta ll c onversion tra y in slots.

126

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LA-350 Charging Requirements/Instruc tions

Place LA-364 battery packs in converted charging slots

Pla c e LA-364 ba ttery pa c ks in c onverted c ha rging slots.

Verify batteries are charging

Verify ba tteries a re c ha rging. When units begin to c ha rge a red LED will c ome on

nea r the c ha rging slot. This LED will sta y lit until the rec eivers a re fully c ha rged.

Verify full charge

Verify full c ha rge. When the units a re fully c ha rged a green LED will c ome on nea r

the c ha rging slot.

Red LED=C ha rging in Proc ess, G reen

LED=C ha rging C omplete.

127

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LA-350/351 Cord Tidy Rac k

The Cord Tidy Rack

The C ord Tidy Ra c k c a n be used, if desired, to help with orga nizing the la nya rd c ords of the LR-44

rec eiver during c ha rging or stora ge. Insert the tidy ra c k into the holes on top of the sta tion to use.

C ord Tidy Ra c k

128

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Notes

129

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Notes

130

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Supplementary Information Table of Contents

Troubleshooting

133

135

137

Frequently Asked Questions

C omplia nc e Informa tion

Wa rra nty

C onta c ting Listen

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Troubleshooting

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I believe my radiator has power but none of the LEDs on the front are on.

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My radiator is not radiating a signal.

If there is no a udio a t the tra nsmitter for 30 minutes, the ra dia tor(s) will stop ra dia ting to c onserve

the life of the ra dia tor diodes. When the a udio returns, the ra dia tors will return to norma l opera tion.

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one c ha nnel on one ra dia tor will c over up to 10,000 ft²(929 m²)a nd tha t this is c ut in ha lf for every

a dditiona l c ha nnel used.

There is interferenc e in my transmission.

In a multi-c ha nnel system, ma ke sure tha t the tra nsmitters a re on different c ha nnels. Also, windows

a nd sunlight c a n c a use interferenc e a nd noise on the rec eiver.

The audio “drops out” in areas I don’t believe it should.

ꢁ

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tria l a nd error. With degra da tion of the IR diodes, the system now ha s dropouts due to this

reduc tion in IR output power from the ra dia tor. Ma ke sure to a lwa ys design the system using the

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switc h settings ma y be inc orrec t. The ra dia tors c ould be out of pha se a nd therefore c a nc eling

ea c h other out. Ma ke sure to set up the dela y c ompensa tion switc h c orrec tly, refer to pa ge 16 for

further informa tion.

The audio sounds distorted in my rec eivers.

The rec eiver ma y be a pproa c hing the edge of the c overa ge pa ttern where the distortion a nd

noise c a n be higher. Also, if the rec eiver is within 10 feet of the ra dia tor it c a n c a use the rec eiver

to be sa tura ted with IR. It is a good idea to ha ve a minimum dista nc e of 10 feet from a ny ra dia tor.

I turn up the volume wheel all the way on my rec eiver but the audio level is still too low.

Ma ke sure tha t the Input level a nd Tra nsmit Level is a djusted a ppropria tely on the tra nsmitter.

Low ba tteries in the rec eiver will a lso c a use low output volume.

There is a tone in the audio.

Ma ke sure the test tone button on the tra nsmitter is OFF. Also, ma ke sure tha t two tra nsmitters a re

not on the sa me c ha nnel in a multi-c ha nnel system.

I c annot c hange the c hannel on my rec eiver.

ꢁ

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c ha nge c ha nnel, the rec eiver is loc ked on the c urrent c ha nnel. See pa ge 101 for informa tion on

unloc king the unit.

137

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Troubleshooting

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I c annot get my rec eiver to sc roll to the c hannel I want to use.

There a re two rea sons why the rec eiver would not sc roll to the c ha nnel you wa nt the unit to be on.

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trying to tune the unit to. See pa ge 102 for more informa tion a bout Auto-Seek mode. The sec ond

is tha t the unit is progra mmed to not tune to the c ha nnel you a re trying to tune it to. Refer to pa ge

102 for more informa tion a bout c ha nnel progra mming.

The batteries are not c harging in my rec eivers.

Ma ke sure tha t you ha ve a n LA-364 NiMH ba ttery pa c k insta lled on the rec eiver a nd tha t the

c ha rger is plugged in.

138

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Frequently Asked Questions

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How ma ny ra dia tors c a n a n LT-82 power?

Up to two ra dia tors c a n be powered using a n LT-82. You must use a n externa l power

supply (LA-205) for more ra dia tors.

How ma ny ra dia tors c a n a n LA-205 power?

Up to two ra dia tors c a n be powered using a n LA-205 externa l power supply.

^WA^{ha t do the LEDs on the front of my ra dia tor tell me?}

Refer to pa ge 57 for deta iled informa tion a bout the LED indic a tors on the front of the LA-140 Ra dia tor.

^CA^{a n I turn off the LEDs on the front of my ra dia tor a nd still ha ve it func tion norma lly.}

Yes, you c a n disa ble the LED indic a tors if you desire to do so. Turn SW1 on the rea r of the ra dia tor to

the OFF position. See pa ge 56 for more informa tion.

^WA^{ha t is the life-spa n of the Listen LA-140 Ra dia tor?}

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a t a pproxima tely 8,000 hours. This is equiva lent to three yea rs of opera ting a t eight hours per da y.

^IfA^{one of the LEDs on a ra dia tor fa ils, how ma ny LEDs will stop working?}

If a diode goes out, the ra dia tor ha s been designed to minimize the impa c t on the rest of the LEDs.

Worse c a se, 12 diodes out of 84 stop working.

^IfA^{I wa nt to mount two ra dia tors side by side c a n I do this a nd wha t pa rt to I need to order?}

Yes this is possible a nd often times it is rec ommended. You will need to order Listen pa rt number

LA-342. See pa ge 77 for more informa tion a bout the dua l mounting bra c ket.

I a m using Non-Listen rec eivers with Listen LT-82 Tra nsmitters,how do I know whic h c ha nnel to use?

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I a m using a non-Listen tra nsmitter with a Listen LA-140 ra dia tor, wha t do I need to know?

It is importa nt tha t SW2 on the rea r of the ra dia tor is switc hed to “c ompa tibility mode.” This will a llow

the ra dia tor to work with other ma nufa c turers tra nsmitters. See pa ge 57 for more informa tion.

139

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Frequently Asked Questions

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to rewire the system every time I do this. Is this possible?

Yes. The tra nsmitter should be pla c ed on c ha nnel “--”. This does not a dd a c ha nnel to the

system in your da isy-c ha in, however a llows other c ha nnels to pa ss through. See pa ge 40

for more informa tion.

C a n I ma ke my rec eiver c ha nge c ha nnels a utoma tic a lly if I enter a room with a signa l present on a

different c ha nnel?

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squelc hes or the selec t button is pressed, the unit will a utoma tic a lly sea rc h for a n a c tive

c ha nnel. Refer to pa ge 102 for more informa tion a bout Auto-Seek Mode.

How do I c hec k the ba ttery level on my rec eivers?

When the unit is on, press the power button momenta rily. The LEDs will displa y the ba ttery

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How do I a djust the squelc h setting on my rec eiver?

See pa ge 106 for deta iled instruc tions on a djusting the squelc h setting.

How c a n I tell if the rec eiver ha s been fully c ha rged when using the LA-350?

The green LED to the side of c ha rging poc ket will illumina te.

^CA^{a n I use rec ha rgea ble ba tteries in the a lka line ba ttery c ompa rtment?}

No. You must purc ha se a Listen LA-364 NiMH ba ttery pa c k if you wa nt to use a c ha rging c a se.

^ꢁ0A^{\ꢁUHFKDUJHDEOHꢁEDWWHULHVꢁGRQ·WꢁODVWꢁYHU\ꢁORQJꢀꢁ:K\"}

If your ba tteries ha ve been through ma ny c ha rging c yc les they ma y need to be repla c ed.

140

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Complianc e, Warranty and Contac t Information

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The following c omplia nc e informa tion a pplies to the LT-82, LA-140-G Y, LA-140-WH, LR-42, LR-44 a nd LA-350.

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devic e ma y not c a use ha rmful interferenc e, a nd (2) this devic e must a c c ept a ny interferenc e rec eived, inc luding

interferenc e tha t ma y c a use undesired opera tion.

This C la ss A digita l a ppa ra tus c omplies with C a na dia n IC ES-003.

These devic es a re RoHS c omplia nt.

Warranty

Listen Tec hnologies C orpora tion (Listen) wa rra nts its tra nsmitters a nd rec eivers (LT-82, LT-700, LT-800, LR-100, LR-42,

LR-44, LR-300, LR-400, LR-500, LR-600) to be free from defec ts in workma nship a nd ma teria l under norma l use a nd

c onditions for the useful lifetime of the produc t from da te of purc ha se.

Listen wa rra nts its Sta tiona ry IR Ra dia tors (LA-140) to be free from defec ts in workma nship a nd ma teria l under norma l

use a nd c onditions for three yea rs from the da te of purc ha se.

Listen wa rra nts its Noise C a nc eling Mic rophone (LA-270) to be free from defec ts in workma nship a nd ma teria l under

norma l use a nd c onditions for one yea r from da te of purc ha se.

Listen wa rra nts its C ha rging/C a rrying C a ses (LA-306, LA-311, LA-313, LA-317, LA-318, LA-319, LA-320,

LA-321, LA-322, LA-323, LA-324, LA-325) to be free from defec ts in workma nship a nd ma teria l under norma l use a nd

c onditions for one yea r from da te of purc ha se.

All other produc ts a nd a c c essories a re wa rra nted for 90 da ys from da te of purc ha se.

This wa rra nty is only a va ila ble to the origina l end purc ha ser of the produc t a nd c a nnot be tra nsferred. Wa rra nty is

only va lid if wa rra nty c a rd ha s been returned within 90 da ys of purc ha se. This wa rra nty is void if da ma ge oc c urred

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servic e tec hnic ia n. Wa rra nty does not c over norma l wea r a nd tea r on the produc t or a ny other physic a l da ma ge

unless the da ma ge wa s the result of a ma nufa c turing defec t. Listen is not lia ble for c onsequentia l da ma ges due to

a ny fa ilure of equipment to perform a s intended. Listen sha ll bea r no responsibility or obliga tion with respec t to the

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purpose will c omply with a pplic a ble la ws a nd regula tions. The terms of the wa rra nty a re governed by the la ws of the

sta te of Uta h.

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will, a t its own disc retion either repa ir or repla c e tra nsmitters a nd rec eivers with a new unit or a unit of simila r type

a nd c ondition. Produc t tha t is not c overed under wa rra nty sha ll be repa ired or repla c ed with a unit of simila r type

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If tec hnic a l servic e is needed, plea se c onta c t Listen. Pre-a uthoriza tion is required before returning Listen produc ts.

If produc ts were da ma ged in shipment, plea se c onta c t the c a rrier, then c onta c t Listen for repla c ement or repa ir

requirements pa ya ble by the c a rrier.

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5pm Mounta in Time.

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+1.801.233.8992

North Americ a

+1.800.330.0891

+1.801.233.8995 Fa x

support@listentec h.c om

www.listentec h.c om

141

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Listen Tec hnologies C orpora tion

14912 Herita gec rest Wa y

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+1.801.233.8992

North Americ a

+1.800.330.0891

+1.801.233.8995

fa x

www.listentec h.c om

Printed in the United Sta tes of Americ a

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