Listen Technologies Portable Radio 863050 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 providing

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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support@listentec h.c om

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Listen Tec hnologies G mbH

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905 22 Obera sba c h, G erma ny

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+49 911 955159 0

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+49 911 955159 40

www.listentec h.de

info@listentec h.de

Tha nk you a nd enjoy your listening experienc e!

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Russell G entner a nd the Listen Tea m

Lifetime Warranty – the best in the business!

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were needed, 99% of a ll c lients indic a ted tha t they were ha ppy with repa ir

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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.

The Word Around Listen

“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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Portable FM Table of Contents

Design G uide

FM Tec hnology Overview

System Overview

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Ac c essories

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Frequenc y C ha rt

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Troubleshooting

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Frequently Asked Questions

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Portable FM Design Guide Table of Contents

FM Tec hnology Overview

System Overview

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Frequenc y Modulation (FM) Tec hnology Overview

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This sa me tec hnology is used by loc a l FM ra dio sta tions to broa dc a st voic e a nd music . FM signa ls c a n tra vel

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frequenc y. This sec tion of the ma nua l will help you design a system tha t will get the best ra nge with the lea st

a mount of interferenc e.

Mic rophone

Rec eiver

FM Tra nsmitter

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• Multipath

Multipa th interferenc e is a form of RF interferenc e tha t oc c urs when ra dio signa ls ha ve more tha n one pa th

between the rec eiver a nd the tra nsmitter c a using the two RF signa ls to a dd out of pha se. This c ould oc c ur in a rea s

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a nd out of squelc h when the rec eiver is moved. Porta ble a pplic a tions a re muc h more susc eptible to multipa th

tha n those tha t a re sta tiona ry. Multipa th distortion is often worse a s the dista nc e between tra nsmitter a nd rec eiver

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• Antenna Positioning

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System Overview

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Thus, a person c a n use a line input sourc e a nd mic sourc e.

3.5mm Phone Wiring

Unba la nc ed

+ Tip

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Line input

Mic input

- Sleeve

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System Overview

Transmitter

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na on the unit.

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Receivers

Listen offers two different porta ble rec eivers.

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Key c onc epts in designing a portable FM system

Channel Selection

Use this sec tion of the guide to c hoose the c ha nnel settings for the tra nsmitter a nd rec eivers.

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interferenc e free c ha nnel.

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the tra nsmitting a ntenna .

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c ha rt on pa ge 61 to determine the a ppropria te c ha nnels.

EXAMPLE: 2 c hannel system use c hannels 01 & 11

3 c hannel system use c hannels 01, 06 & 11

Range

The ra nge of a porta ble tra nsmission will va ry from one a pplic a tion to a nother. There a re ma ny different

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Ra nge va ries depending on environment.

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• Move tra nsmitter a nd rec eivers a wa y from meta l objec ts.

• Orient both tra nsmitting a nd rec eiving a ntenna s vertic a lly.

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Key c onc epts in designing a portable FM system

Eliminating Multipath

As mentioned on pa ge 5, multipa th c a n oc c ur with porta ble RF systems. The a udio qua lity of the

tra nsmission c a n dec rea se with the oc c urrenc e of multipa th. Here a re a few potentia l improvements tha t

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Squelch

Squelc hing the rec eiver will mute the a udio output when the signa l from the tra nsmitter is turned off or

the signa l is too wea k to be rec eived. Without squelc h you would hea r ra dio noise in your ea rphone with

no RF signa l present. “Tightening” the squelc h will turn the rec eiver off if it is c ha ttering bec a use of

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ra nge between tra nsmitter a nd Rec eiver.

Transmitter power level

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The lower the power setting, the less ra nge the tra nsmitter will broa dc a st. Dec rea sing the broa dc a st ra nge

will forc e the rec eivers to rema in c loser to the tra nsmitter. To ma inta in a n RF signa l, the higher power

settings will inc rea se ra nge between tra nsmitter a nd rec eiver thus introduc ing a higher proba bility of

multipa th.

Multiple Portable Systems

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Squelch

Muc h like a multipa th situa tion, “tightening” the squelc h on the rec eiver will mute the a udio output when

the signa l is too wea k to be rec eived. Tightening the squelc h will help with forc e the rec eiver to squelc h

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Transmitter power level

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power c ould help dec rea se the a mount of interferenc e if there a re ma ny frequenc ies being used in the

vic inity.

Spacing of channels

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c ha nnels further from ea c h other.

DX/Local

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Notes

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Notes

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LT-700 User’s Manual Table of Contents

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ꢁ

ꢍꢉ

ꢍꢆꢁꢁꢁ

ꢁꢁ%ORFNꢁ'LDJUDPꢁꢁ ꢁ

Quic k Referenc e

ꢁ

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Ac c essories

Notes

LT-700 Pac kage Contents

‡ꢁ/7ꢅꢉꢊꢊꢅꢆꢋꢌ

• Quic k Referenc e C a rd

• Wa rra nty C a rd

• FM Ma nua l C a rd

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Porta ble Displa y FM

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mec ha nic a lly loc ked. The devic e sha ll inc orpora te a n LC D displa y tha t indic a tes ba ttery level, c ha nnel, c ha nnel loc k, low ba ttery,

ba ttery c ha rging, progra mming, a nd RF signa l strength. The porta ble tra nsmitter sha ll inc orpora te a utoma tic ba ttery c ha rging

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863.050 - 864.950 MHz

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50 PPM

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LT-700 Bloc k Diagram

LC D Displa y

Down

Power Supply

C PU Module

Power

Universa l

Power Supply

(not inc luded)

7.5 VDC

115/230VAC

50/60 Hz

Power c ha rge indic a tor

Red LED

Alka line

NiMH

(2) AA Ba tteries

ALka line or NiMH

ANTENNA

C ompa nding

Q-Tec hnology

RF Modula tion

Pre-empha sis

3 VDC

Tip

Mic

Sleeve

Line

Ring

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LT-700 Quic k Referenc e

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Artic ula ting Flexible Antenna

/RRN /LVWHQŒꢁ'LVSOD\ꢄꢁ6KRZVꢁ

tra nsmit level, c ha nnel,

progra mming, ba ttery sta tus, a nd

loc k sta tus.

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3RZHUꢁ%XWWRQꢄꢁ7XUQVꢁ

SRZHUꢁ2Qꢐ2IIꢀ

Front Door Loc k

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the type of ba tteries being

used.

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pa ttern.

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RF Output

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the RF tra nsmit

level.

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func tion is in

proc ess.

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c ha nnel ha s been loc ked out.

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loc ked on c urrent c ha nnel.

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LT-700 Setup Instruc tions

Unpack the Product

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c onta c t the dea ler from whic h the produc t wa s purc ha sed or Listen Tec hnologies

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Open the front access door

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To unloc k the door, rota te the loc k ¼ turn c ounterc loc kwise. G rip the two ta bs with your thumb a nd index

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Select Battery Type

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position. Use a pen or sma ll sc rewdriver to selec t the ba ttery type.

WARNING: Do not plac e the BATTERY switc h in the NiMH position if you are not using Nic kel Metal Hydride

Batteries. The NiMH position will attempt to c harge any batteries in the unit, even if they are

not the proper type. Charging non-Nic kel Metal Hydride (NiMH) batteries will result in physic al

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CAUTION: If you are using any battery type other than rec hargeable Nic kel Metal Hydride (NiMH)

batteries, make sure the BATTERY selec tion switc h is in the alkaline position.

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LT-700 Setup Instruc tions

Set Mic Sensitivity Switch

The mic rophone sensitivity switc h is loc a ted inside the ba ttery c ompa rtment, to the left of the

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a nother vendor, you ma y need to experiment with different settings.

Part # Description Setting

ꢁ

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/$ꢅꢎꢉꢋꢁꢁ &ROODUꢁ0LFURSKRQH

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/$ꢅꢎꢉꢆꢁꢁ &RQIHUHQFHꢁ0LFURSKRQH

Place Batteries in Unit

Pla c e two AA ba tteries in the c ompa rtment, ma king note of the ba ttery pola rity shown in the

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LT-700 Setup Instruc tions

Connect the Microphone

The mic rophone ja c k is loc a ted on top of the unit.

Connect the Line Input Cable (Optional)

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ERWKꢁDꢁPLFURSKRQHꢁDQGꢁOLQHꢁLQSXWꢁWRꢁWKHꢁMDFNꢁRQꢁWRSꢁRIꢁWKHꢁ/7ꢅꢉꢊꢊꢀꢁ6HHꢁWKHꢁGLDJUDPꢁEHORZꢁIRUꢁFRQQHFWLRQꢁ

informa tion. You c a n use the mic rophone a nd the line input a t the sa me time.

NOTE: The MUTE switc h mutes only the mic rophone; the line sourc e will c ontinue transmitting when the

switc h is in the MUTE position.

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LT-700 Operating Instruc tions

Turn Unit On

1A Power On/Oﬀ Button

When you press the power button, the unit turns on. The LED on top of the unit will be

illumina ted a nd the LC D displa y will be visible.

Antenna Positioning

Ra ise the a ntenna to the upright position. When the a ntenna if fully upright, it will c lic k

into position.

NOTE: Be aware that the transmission range c ould dec rease if the antenna is

not in an upright position.

Select the channel for transmitting

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interferenc e free c ha nnel.

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LT-700 Operating Instruc tions

Using the MUTE / TALK switch

Slide the switc h to the mute position a nd the mic rophone a udio is muted. When the

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Locking the Transmitter 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 nnels even if the c ha nnel selec t

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or when multiple systems a re in the sa me a rea .

To lock on a channel

Press and hold the DOWN button for 5 seconds

Press a nd hold the DOWN button for 5 sec onds to loc k the tra nsmitter onto the desired

c ha nnel. Press a nd hold the button a ga in to unloc k.

NOTE: On the LT-700, when the c hannel is loc ked, a loc k ic on will appear underneath

“Listen” on the display.

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LT-700 Programming Instruc tions

Program Mode Overview

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from high to low power levels. Adjusting the power settings a llows you to set the ra nge of the tra nsmission.

Entering Program Mode

While the unit is ON, press a nd hold the c ha nnel down a nd up buttons simulta neously for 3 sec onds.

The “PG M” ic on on the LC D will a ppea r indic a ting progra m mode is entered.

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LT-700 Programming Instruc tions

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c ha nnel up or down buttons will sc roll through the func tions. Pressing the power button will enter tha t func tion.

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When no button is pressed for 10 sec onds, the progra m menu is exited a ltogether, rega rdless of whether a

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the progra mming menu.

Pressing a nd holding power for a full 4 sec onds will exit both progra mming func tion a nd progra mming menu.

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LT-700 Programming Instruc tions

Resetting to defaults

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Reset to default settings

Press and hold the Up and Down channel buttons while turning the unit on.

Press a nd hold the Up a nd Down c ha nnel buttons while turning the unit on. This will light

up a ll segments of the displa y.

After the transmitter has been reset

After the tra nsmitter ha s been reset, the displa y will return with defa ults present.

NOTE: The defaults are

• Power Level: P3

• Channel: 01

* Channel loc kout: All c hannels ac tive

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Ac c essories for LT-700

Accessories

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Ha nd Held Mic rophone

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C onferenc e Mic rophone

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Notes

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Notes

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LR-400/500 User’s Manual Table of Contents

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Quic k Referenc e

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Ac c essories

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LR-400/500 Pac kage Contents

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• Quic k Referenc e C a rd

• Wa rra nty C a rd

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Porta ble Displa y

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c a pble of seeking c ha nnels. The devic e sha ll ha ve a n a djusta ble squelc h. The devic e sha ll ha ve a n

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tha t a llows the user to plug in either a mono or stereo hea dset. The devic e sha ll inc orpora te a n LC D

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ba tteries. The rec eiver sha ll inc orpora te a utoma tic ba ttery c ha rging c irc uitry for rec ha rging of NiMH

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rec eiver sha ll inc orpora te a utoma tic ba ttery c ha rging c irc uitry for rec ha rging of NiMH ba tteries. The

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LR-500-863

863.050 - 864.950 MHz

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LR-400/500 Bloc k Diagram

LC D Displa y

Down

Seek

Power Supply

C PU Module

Universa l

Power Supply

(not inc luded)

115/230VAC

50/60 Hz

Power c ha rge indic a tor

Red LED

Alka line

NiMH

(2) AA Ba tteries

ALka line or NiMH

POWER

Off

ANTENNA

C ompa nding

Q-Tec hnology

de-empha sis

de-modula tion

VOLUME

Tip

3.5 mm C onnec tor

Sleeve

Ring

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LR-400-863 Quic k Referenc e

ꢌꢀꢇꢁPPꢁ2XWSXWꢁ-DFNꢄꢁ&RQQHFWꢁDꢁOLVWHQꢁHDUSLHFHꢁKHUHꢀ

Artic ula ting Flexible Antenna

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2Qꢐ2IIꢁDQGꢁ9ROXPHꢁ&RQWUROꢁ'LDO

/RRN /LVWHQŒꢁ'LVSOD\ꢄꢁ6KRZVꢁ

rec eive level, c ha nnel, ba ttery

sta tus, a nd loc k sta tus.

3RZHUꢐ&KDUJLQJꢁ3RUW

6((.ꢁ%XWWRQꢄꢁ$OORZVꢁWKHꢁ

user to c ha nge c ha nnels

or loc k on a c ha nnel.

Front Door Loc k

%DWWHU\ꢁ6HOHFWꢁ6ZLWFKꢄꢁ&KRRVHꢁ

the type of ba tteries being

used.

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%DWWHU\ꢁ&RPSDUWPHQWꢄꢁ3ODFHꢁ

ꢎꢅ$$ꢁEDWWHULHVꢁLQꢁFRPSDUWPHQWꢀꢁ

%HꢁVXUHꢁWRꢁIROORZꢁSRODULW\ꢁ

pa ttern.

&KDQQHOꢁ'LVSOD\ꢄꢁ'LVSOD\VꢁWKHꢁ

FKDQQHOꢁWKHꢁ/5ꢅꢏꢊꢊꢁLVꢁFXUUHQWO\ꢁRQꢀ

5)ꢁ,QSXWꢁ,QGLFDWRUꢄꢁ

,QGLFDWHVꢁWKHꢁ5)ꢁUHFHLYHꢁ

level.

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/RFNꢁ,FRQꢄꢁ,QGLFDWHVꢁWKHꢁXQLWꢁLVꢁ

loc ked on c urrent c ha nnel.

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LR-500-863 Quic k Referenc e

ꢌꢀꢇꢁPPꢁ2XWSXWꢁ-DFNꢄꢁ&RQQHFWꢁDꢁOLVWHQꢁHDUSLHFHꢁKHUHꢀ

/('ꢄꢁ:KHQꢁOLWꢂꢁLQGLFDWHVꢁXQLWꢁKDVꢁSRZHUꢀ

2Qꢐ2IIꢁDQGꢁ9ROXPHꢁ&RQWUROꢁ'LDO

Artic ula ting Flexible Antenna

/RRN /LVWHQŒꢁ'LVSOD\ꢄꢁ

Shows rec eive level, c ha nnel,

progra mming, ba ttery

sta tus, a nd loc k sta tus.

3RZHUꢐ&KDUJLQJꢁ3RUt

6((.ꢁ%XWWRQꢄꢁ$OORZVꢁWKHꢁ

user to c ha nge c ha nnels

or loc k on a c ha nnel.

Front Door Loc k

%DWWHU\ꢁ6HOHFWꢁ6ZLWFKꢄꢁ&KRRVHꢁ

the type of ba tteries being

used.

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ꢎꢅ$$ꢁEDWWHULHVꢁLQꢁFRPSDUWPHQWꢀꢁ

%HꢁVXUHꢁWRꢁIROORZꢁSRODULW\ꢁ

pa ttern.

&KDQQHOꢁ'LVSOD\ꢄꢁ'LVSOD\VꢁWKHꢁ

FKDQQHOꢁWKHꢁ/5ꢅꢇꢊꢊꢁLVꢁFXUUHQWO\ꢁRQꢀ

5)ꢁ,QSXWꢁ

,QGLFDWRUꢄꢁ

,QGLFDWHVꢁWKHꢁ

RF rec eive

level.

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/ꢐ2ꢄꢁ,QGLFDWHVꢁZKLOHꢁLQꢁSURJUDPPLQJꢁ

3URJUDPꢄꢁ

Func tion is

in proc ess.

PRGHꢁWKHꢁVSHFLÀFꢁFKDQQHOꢁKDVꢁ

been loc ked out.

/RFNꢁ,FRQꢄꢁ,QGLFDWHVꢁWKHꢁXQLWꢁLVꢁ

loc ked on c urrent c ha nnel

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LR-400/500 Setup Instruc tions

Remove the product

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plea se c onta c t the dea ler from whic h the produc t wa s purc ha sed or Listen Tec hnologies C orpora ꢅ

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Open the front access door

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the unit. To unloc k the door, rota te the loc k ¼ turn c ounterc loc kwise. G rip the two ta bs with

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unit a t this time.

Select Battery Type

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Use a pen or sma ll sc rewdriver to selec t the ba ttery type.

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WARNING: Do not plac e the BATTERY switc h in the NiMH position if you are not using

Nic kel Metal Hydride Batteries. The NiMH position will attempt to c harge

any batteries in the unit, even if they are not the proper type. Charging

non-Nic kel Metal Hydride (NiMH) batteries will result in physic al harm,

GHVWUXFWLRQꢀRIꢀSURSHUW\ꢀDQGꢈRUꢀÀUHꢉ

CAUTION: If you are using any battery type other than rec hargeable Nic kel Metal

Hydride (NiMH) batteries, make sure the BATTERY selec tion switc h is in the

alkaline position.

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LR-400/500 Setup Instruc tions

Place Batteries in Unit

Pla c e two AA ba tteries in the c ompa rtment, ma king note of the ba ttery pola rity shown in the ba ttery

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EDWWHULHVꢁ\RXꢁDUHꢁXVLQJꢀꢁꢒ$ONDOLQHꢁVKRXOGꢁEHꢁVHOHFWHGꢁIRUꢁDOOꢁEDWWHU\ꢁW\SHVꢁRWKHUꢁWKDQꢁ1L0+ꢓꢀꢁ

NOTE: Listen provides industrial strength AA alkaline batteries (part number LA-361) and high

performanc e AA Nic kel Metal Hydride batteries (part number LA-362). These may be

purc hased from your Listen dealer.

Connect an Earphone or Headset

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

c onnec tors ma y be used with a Listen rec eiver. Ma ke c erta in you push the plug a ll the wa y into

the ja c k.

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LR-400/500 Setup Instruc tions

Turn the Unit On

Rec eivers a re turned on by rota ting the volume dia l c ounterc loc kwise. The red LED on top of the unit will

LOOXPLQDWHꢁDQGꢁWKHꢁ/&'ꢁGLVSOD\ꢁVKRXOGꢁLOOXPLQDWHꢀꢁ,IꢁWKH\ꢁGRꢁQRWꢂꢁPDNHꢁVXUHꢁ\RXꢁKDYHꢁLQVWDOOHGꢁWKHꢁEDWWHUꢅ

ies c orrec tly a nd tha t you a re using fully c ha rged ba tteries.

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LR-400/500 Operating Instruc tions

Turn Unit On

Volume knob

Rota te the volume knob c ounterc loc kwise with a n ea rphone or hea dset c onnec ted to

the unit.

WARNING: Exc essive volume may result in hearing damage.

Antenna Placement

Antenna Position

Ra ise the a ntenna to the upright position. When the a ntenna if fully extended, it will

c lic k into position.

NOTE: Be aware that the transmission range c ould dec rease if the antenna is

not in an upright position.

Select a Channel

Select the channel using channel select buttons

Selec t the c ha nnel to ma tc h the tra nsmission c ha nnel by pressing the UP a nd DOWN

buttons on the rec eiver.

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LR-400/500 Operating Instruc tions

Select the channel using SEEK

$QRWKHUꢁZD\ꢁWRꢁÀQGꢁDꢁFKDQQHOꢁRQꢁWKHꢁ/5ꢅꢏꢊꢊꢐꢇꢊꢊꢁLVꢁWRꢁXVHꢁWKHꢁ6((.ꢁEXWWRQꢀꢁ

When you do this, the Listen rec eiver looks for the next a c tive c ha nnel.

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JHWꢁLQWHUIHUHQFHꢂꢁSUHVVꢁWKHꢁ6((.ꢁEXWWRQꢁDJDLQꢀꢁ7KHꢁXQLWꢁPD\ꢁVWRSꢁRQꢁDꢁ

c ha nnel tha t is c lose to the a c tua l broa dc a st c ha nnel, in whic h c a se the

FKDQQHOꢁZLOOꢁVRXQGꢁQRLV\ꢁRUꢁGLVWRUWHGꢀꢁ6LPSO\ꢁSUHVVꢁ6((.ꢁDJDLQꢁXQWLOꢁ\RXꢁÀQGꢁWKHꢁ

c lea rest opera ting c ha nnel.

Adjust the volume control

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

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LR-400/500 Operating Instruc tions

Locking the Receiver on One Channel

7KHꢁXQLWꢁFDQꢁEHꢁHOHFWURQLFDOO\ꢁORFNHGꢁRQꢁRQHꢁFKDQQHOꢁVRꢁWKDWꢁLWꢁZLOOꢁQRWꢁFKDQJHꢁFKDQQHOVꢁHYHQꢁLIꢁWKHꢁ´6((.µꢁEXWWRQꢁLVꢁ

SUHVVHGꢀꢁ,WꢁLVꢁUHFRPPHQGHGꢁWRꢁORFNꢁWKHꢁUHFHLYHUꢁRQꢁDꢁFKDQQHOꢁWKDWꢁLVꢁEHLQJꢁXVHGꢁLQꢁDꢁVLQJOHꢁFKDQQHOꢁV\VWHPꢁRUꢁZKHQꢁPXOꢅ

tiple systems a re in the sa me a rea .

To lock on a channel

Press and hold the SEEK button for 5 seconds

3UHVVꢁDQGꢁKROGꢁWKHꢁ6((.ꢁEXWWRQꢁIRUꢁꢇꢁVHFRQGVꢁWRꢁORFNꢁDꢁUHFHLYHUꢁRQWRꢁWKHꢁFXUUHQWO\ꢁWXQHGꢁ

c ha nnel. Press a nd hold the button a ga in to unloc k. When loc ked the LED on top of

WKHꢁXQLWꢁZLOOꢁÁDVKꢁZKHQꢁ\RXꢁSUHVVꢁWKHꢁ6((.ꢁEXWWRQꢀ

NOTE: On the LR-400/500, when the c hannel is loc ked, a loc k ic on will appear underneath

“Listen” on the display. Also if the unit is loc ked, the red LED on top of the rec eiver will

ÁDVKꢀZKHQꢀWKHꢀ6((.ꢀEXWWRQꢀLVꢀSUHVVHG.

ꢏꢉ

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LR-400/500 Operating Instruc tions

Squelch Programming

Entering Squelch Program Mode

Turn unit off

3UHVVꢁDQGꢁKROGꢁWKHꢁ6((.ꢁEXWWRQꢕꢁZKLOHꢁKROGLQJꢁ6((.ꢁEXWWRQꢁGRZQꢂꢁWXUQꢁWKHꢁ21ꢐ2))ꢐ92/80(ꢁGLDOꢁWRꢁWXUQꢁ

the unit on.

5HOHDVHꢁWKHꢁ6((.ꢁEXWWRQꢁZKHQꢁWKHꢁ/LVWHQꢁQDPHꢁGLVDSSHDUVꢁꢒDSSUR[LPDWHO\ꢁꢎꢁVHFRQGVꢓꢁDQGꢁDꢁWZRꢁGLJLWꢁ

displa y is seen.

Adjusting the Squelch level

8VHꢁWKHꢁ&KDQQHOꢁ83ꢁDQGꢁ'2:1ꢁEXWWRQVꢁWRꢁUDLVHꢁRUꢁORZHUꢁWKHꢁVTXHOFKꢁVHQVLWLYLW\ꢁVHWWLQJVꢁꢒUHIHUꢁWRꢁWKHꢁFKDUWꢁRQꢁ

pa ge 49 for settings.

Lower numbers mea n tha t a less powerful a nd possibly noisy signa l will be hea rd, but you c a n ha ve a

longer ra nge before the unit will squelc h.

2QFHꢁWKHꢁGHVLUHGꢁVTXHOFKꢁVHWWLQJꢁLVꢁIRXQGꢂꢁSUHVVꢁ6((.ꢁWRꢁH[LWꢁWKHꢁVTXHOFKꢁSURJUDPPLQJꢁPRGHꢀ

NOTE: Keep in mind, low squelc h may allow multipath and squelc h c hattering at long distanc es.

6TXHOFKꢁVHWWLQJꢁꢊꢊꢁLVꢁQRꢁVTXHOFKꢕꢁWKLVꢁVHWWLQJꢁGLVDEOHVꢁWKHꢁVTXHOFKLQJꢁFDSDELOLWLHVꢁRIꢁWKHꢁUHFHLYHUꢀꢁ6TXHOFKꢁ

VHWWLQJꢁꢎꢊꢁLVꢁPD[LPXPꢁVTXHOFKꢁVHQVLWLYLW\ꢕꢁZKHQꢁRQꢁWKLVꢁVHWWLQJꢂꢁWKHUHꢁPXVWꢁEHꢁDꢁYHU\ꢁVWURQJꢁDQGꢁVWDEOHꢁ

RF signa l for the unit to not enga ge the squelc h fea ture.

NOTE: For squelc h settings 1-3, the squelc h func tion is slow whic h allows for maximum

transmission range. For squelc h settings 4-20 the squelc h func tion is fast to ensure little

radio noise is heard during the squelc h func tion.

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LR-400/500 Operating Instruc tions

Squelch

The purpose of squelc h is to mute the a udio output of your rec eiver when the signa l from the

tra nsmitter 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 the a udio on

GLIIHUHQWꢁ5)ꢁVLJQDOꢁVWUHQJWKVꢀꢁ7KLVꢁLVꢁXVHIXOꢁDVꢁIROORZVꢄ

Squelc h

Setting

Set the squelch setting to the highest level

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tra nsmitters, set the squelc h setting to the highest level tha t

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If the receiver is close to the transmitter, set the squelch high

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tra nsmitter is turned off it immedia tely squelc hes a nd ignores

tra nsmitters in other rooms.

If in an area that has a lot of interference, set the squelch high

ꢉ

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set the squelc h setting to a high setting to ensure the

interferenc e is not pic ked up by the rec eiver.

ꢍꢉ

For maximum amount of range, set the squelch to a low level

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NOTE: Default squelc h setting is 3

CAUTION: When setting the squelc h level low the reliability of squelc h

func tion is c ompromised. This will c ause radio noise to be heard

in the earphone and there is a possibility of hearing damage.

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LR-400/500 Operating Instruc tions

DX/Local

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interferenc e in a busy RF environment. This is done by limiting the a mount of RF ga in in the rec eiver.

When loc a l mode is selec ted, the ra nge of the rec eiver is c ompromised. Depending on your a pplic a tion

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DX Mode (default)

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when ma ny frequenc ies a re being used.

Local mode

Only strong c ha nnels will be a utoma tic a lly tuned in

To change to DX/Local mode

1A While the unit is OFF, press a nd hold the c ha nnel down button a nd turn the unit on.

The LC D sha ll indic a te the c urrent setting “D” or “L”.

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Pressing seek will enter the setting a nd return to norma l opera tiona l mode.

Loc a l

Resetting to defaults

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Reset to default settings

Press and hold the Up and Down channel buttons while turning the unit on.

Press a nd hold the Up a nd Down c ha nnel buttons while turning the unit on. This will light

up a ll segments of the displa y.

After the receiver has been reset

After the rec eiver ha s been reset, the displa y will return with defa ults present.

NOTE: The defaults are

• Channel: 01

* Channel loc kout: All c hannels ac tive

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LR-500 Programming Instruc tions (LR-500 only)

Programming Instructions

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Entering Program Mode

To enter program mode

While the unit is ON, press a nd hold the c ha nnel down a nd up buttons simulta neously for 3 sec onds.

The “PG M” ic on on the LC D will a ppea r indic a ting progra m mode is a c tive.

To program

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Pressing the seek button will enter tha t pa rtic ula r func tion.

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c ha nnels. Pressing the seek button will toggle between a va ila ble a nd loc ked out for tha t c ha nnel. When a c ha nꢅ

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NOTE: Although it is possible to display an F2 func tion while in program mode, there is no F2 func tion at this

time. Listen may add another programming func tion in the future, but there is only one programming

func tion (F1) on the 863 MHz rec eivers.

When no button is pressed for 10 sec onds, the progra m menu is exited a ltogether, rega rdless of whether a

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:KHQꢁLQꢁWKHꢁSURJUDPPLQJꢁPHQXꢄꢁ3UHVVꢁDQGꢁKROGꢁSRZHUꢁIRUꢁꢎꢁVHFRQGVꢀꢁ7KLVꢁH[LWVꢁWKHꢁSURJUDPꢁPRGHꢀ

3B :KHQꢁLQꢁDꢁSURJUDPPLQJꢁIXQFWLRQꢄꢁ3UHVVꢁDQGꢁKROGꢁSRZHUꢁIRUꢁꢎꢁVHFRQGVꢀꢁ7KLVꢁH[LWVꢁWKHꢁIXQFWLRQꢁDQGꢁJRHVꢁEDFNꢁWRꢁ

the progra mming menu.

Pressing a nd holding power for a full 4 sec onds will exit both progra mming func tion a nd progra mming menu.

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Ac c essories for LR-400/500

Accessories

/$ꢅꢍꢋꢋ

/$ꢅꢍꢋꢏ

/$ꢅꢍꢋꢇ

Nec k Loop

Ea r Spea ker

Stereo Hea dphones

/$ꢅꢌꢋꢍ

/$ꢅꢍꢉꢊ

%HKLQGꢅWKHꢅ+HDGꢁ

Stereo Hea dphones

/$ꢅꢌꢊꢏ

High C a pa c ity AA Alka line

Assistive Listening

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%DWWHULHVꢁꢒꢎꢓꢁ

/$ꢅꢌꢋꢎ

Rec ha rgea ble AA NiMH

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/$ꢅꢌꢍꢌꢁꢁꢍꢋꢅ8QLWꢁ3RUWDEOHꢁ&DUU\LQJꢁ&DVH

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/$ꢅꢌꢍꢆꢁꢁꢏꢅ8QLWꢁ3RUWDEOHꢁ&DUU\LQJꢁ&DVH

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/$ꢅꢌꢎꢏꢁꢁꢆꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVHꢁZꢐ5HPRYDEOHꢁ/LG

/$ꢅꢌꢎꢇꢁꢁꢍꢋꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVHꢁZꢐ5HPRYDEOHꢁ/LG

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Notes

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Notes

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ꢇꢉ

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Supplementary Information Table of Contents

Frequenc y C ha rt

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Troubleshooting

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Frequently Asked Questions

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Notes

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Frequenc y Chart

Frequencies

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Battery Charging Information

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into a Listen c ha rging c a se, NiMH ba tteries will be c ha rged.

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ta kes a bout 13 hours. Listen rec ommends tha t you a llow the c ha rger to c omplete its full c yc le every time for ma ximum ba ttery life.

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c yc le over a ga in.

When not using the rec eiver, it is rec ommended to lea ve the unit on the c ha rger. The c ha rger provides a “ma intena nc e”

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NOTE: Listen provides 2300 mAH (milli-Amp-hour) c onstant c urrent (NiMH Nic kel Metal Hydride) batteries.

These may be purc hased from Listen (part number LA-362).

Charging with a drop-in charger

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the c ha rger to power. Ma ke sure the unit is fully sea ted in its slot.

IMPORTANT: DO NOT ATTEMPT TO CHARGE ANY TYPE OF BATTERY OTHER THAN NiMH (NICKEL METAL HYDRIDE) with

your Listen equipment. Alkaline batteries may explode when c onnec ted to a c harger. Other risks of

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IMPORTANT: In order to c harge NiMH batteries, the BATTERY SELECT switc h in your Listen produc t must be set to the

NiMH setting. Use a pen or small sc rewdriver to move the switc h (loc ated in the battery c ompartment)

to the proper position.

WARNING: The c ase lid MUST be open or removed while the units are c harging. The c harging proc ess generates

heat. Air ventilation is required. It is best to store your c harging c ase at room temperature away from

heat sourc es and direc t sunlight

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Troubleshooting

The unit has no power.

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different set of ba tteries. Ma ke sure the ba tteries a re insta lled c orrec tly.

There is no audio.

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ꢁ

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a t the “ring” of the c onnec tor. Also,be sure the rec eiver is on, volume is turned “up”, a nd hea dphones

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The audio is distorted.

Ma ke sure you a re using a n a pproved Listen mic rophone. Try using a different mic sensitivity switc h

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input, try turning down the level of the input. Ma ke sure the rec eiver is “ON” a nd rec eiving the

a ppropria te c ha nnel.

There is hum in the audio.

The mic rophone ma y be too c lose to a tra nsformer. Try moving a wa y from the tra nsformer a nd see if

the hum goes a wa y.

The mic rophone level is low.

ꢁ

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DꢁKHDGꢅZRUQꢁPLFURSKRQHꢀ

ꢁ

There is too muc h noise.

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ꢁ

ba c kground noise. Try positioning the mic rophone c loser or try using a mic rophone tha t is direc tiona l

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FRPSDUWPHQWꢓꢀꢁ

There is interferenc e.

ꢁ

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tra nsmitters “on”. The rec eiver will stop on a ny c ha nnels tha t a re being broa dc a sted in the a rea .

Avoid the c ha nnels tha t the rec eiver detec ts ha ving a signa l.

I c annot pic k up the signal on the rec eiver.

Ma ke sure the tra nsmitter a nd the rec eiver a re on the sa me frequenc y c ha nnel.

It’s c onfusing for users to have 17 available c hannels.

ꢁ

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a ble to sc roll through a va ila ble c ha nnels.

I c annot c hange the c hannel.

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a nd hold the UP or DOWN button for 5 sec onds.

ꢁ

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Troubleshooting

My batteries are not c harging

ꢁ

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FRPSDUWPHQWꢓꢁLVꢁVHWꢁWRꢁWKHꢁ1L0+ꢁSRVLWLRQꢀꢁ0DNHꢁVXUHꢁWKHꢁEDWWHULHVꢁDUHꢁLQVWDOOHGꢁFRUUHFWO\ꢀꢁ0DNHꢁVXUHꢁ

you a re using a Listen c ha rging c a se. Ma ke sure the c ha rging c a se is c onnec ted to power a nd

the unit is sec urely pushed into its slot in the c a se.

NOTE: Listen uses 2300 mAh (milli-Amp-hour) c onstant c urrent NiMH (Nic kel Metal Hydride) batteries. These

may be purc hased from a Listen dealer (ask for part number LA-362).

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Frequently Asked Questions

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Yes. To tra nsmit two different frequenc ies, there must be two sepa ra te tra nsmitters.

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a nd c a n loc k out unused c ha nnels.

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As ma ny a s you need, the number is endless.

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progra mma ble to just those c ha nnels you need.

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Fifteen hours a lka line. Eight hours NiMH.

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Frequently Asked Questions

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Yes. All Listen rec eivers c a n be loc ked on a single c ha nnel.

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20 hours using a lka line ba tteries. 10 hours using NiMH ba tteries.

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Complianc e, Warranty and Contac t Information

Compliance Information

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These devic es a re C E c omplia nt.

These devic es a re RoHS c omplia nt.

Warranty

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

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

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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, or online wa rra nty registra tion, ha s been c ompleted within 90 da ys

of purc ha se. This wa rra nty is void if da ma ge oc c urred bec a use of misuse or if the produc t ha s been repa ired or

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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.

Wa rra nty does not inc lude inbound freight c osts. 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 ma nner of

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of use of suc h equipment inc luding, without limita tion, a ny wa rra nty tha t the use of suc h equipment for a ny 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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Contacting Listen

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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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more informa tion on Listen solutions, c onta c t Listen Tec hnologies a t +1.801.233.8992, +1.800.330.0891 North Americ a ,

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Europe

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support@listentec h.de

www.listentec h.de

support@listentec h.c om

www.listentec h.c om

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Notes

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Listen Tec hnologies C orpora tion

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+1.801.233.8992

North Americ a

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www.listentec h.c om

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Listen Tec hnologies G mbH

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905 22 Obera sba c h, G erma ny

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+49 911 955159 0

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Printed in the United Sta tes of Americ a

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