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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+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  
Listen Tec hnologies G mbH  
Ja sminstr. 16  
905 22 Obera sba c h, G erma ny  
Tel  
+49 911 955159 0  
Fa x  
+49 911 955159 40  
www.listentec h.de  
info@listentec h.de  
Tha nk you a nd enjoy your listening experienc e!  
%HVWꢁUHJDUGVꢂ  
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  
5
6
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Notes  
10  
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Quic k Referenc e  
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Ac c essories  
Notes  
29  
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53  
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Ac c essories  
Notes  
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Frequenc y C ha rt  
61  
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63  
65  
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68  
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Troubleshooting  
Frequently Asked Questions  
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Notes  
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Portable FM Design Guide Table of Contents  
FM Tec hnology Overview  
5
System Overview  
6
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Notes  
10  
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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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5
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System Overview  
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Porta ble Progra mma ble  
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Porta ble Displa y FM  
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Input Source  
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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  
+ Ring  
Line input  
Mic input  
- Sleeve  
-
6
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System Overview  
Transmitter  
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na on the unit.  
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Porta ble Displa y FM  
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Receivers  
Listen offers two different porta ble rec eivers.  
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Porta ble Displa y FM  
Porta ble Progra mma ble  
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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.  
8
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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  
8VHꢁDꢁ/LVWHQꢁIUHTXHQF\ꢁFKDUWꢁꢒRQꢁSDJHꢁꢋꢍꢓꢁWRꢁGHWHUPLQHꢁWKHꢁFKDQQHOVꢁIUHTXHQF\ꢁDQGꢁVSDFHꢁWKHꢁQXPEHUꢁRIꢁ  
c ha nnels further from ea c h other.  
DX/Local  
7KHꢁUHFHLYHUꢁFDQꢁEHꢁDGMXVWHGꢁWRꢁUHFHLYHꢁRQO\ꢁWKHꢁVWURQJHVWꢁVLJQDOVꢁꢒUHIHUꢁWRꢁSDJHꢁꢇꢊꢁIRUꢁ';ꢐ/RFDO  
LQIRUPDWLRQꢓꢀꢁ$ꢁ';ꢁVLJQDOꢁZLOOꢁEHꢁOHVVꢁVHQVLWLYHꢁEHFDXVHꢁGLVWDQFHꢁLVꢁWKHꢁXOWLPDWHꢁJRDOꢀꢁ)RUꢁDSSOLFDWLRQVꢁZKHUHꢁ  
\RXꢁZDQWꢁWRꢁPLQLPL]HꢁWKHꢁGLVWDQFHꢂꢁORFDOꢁPRGHꢁZLOOꢁRQO\ꢁVHDUFKꢁIRUꢁVWURQJꢁVLJQDOVꢀꢁ/RFDOꢁPRGHꢁLVꢁPXFKꢁ  
PRUHꢁVHQVLWLYHꢁWKDQꢁ';ꢀ  
9
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Notes  
10  
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Notes  
11  
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LT-700 User’s Manual Table of Contents  
ꢁꢁ6SHFLÀFDWLRQVꢁꢁ  
ꢍꢉ  
ꢍꢆꢁꢁꢁ  
19  
ꢁꢁ%ORFNꢁ'LDJUDPꢁꢁ   
Quic k Referenc e  
ꢁꢁ6HWXSꢁ,QVWUXFWLRQVꢁꢁ  
ꢎꢊ  
ꢎꢌ  
ꢎꢇ  
28  
ꢁꢁ2SHUDWLQJꢁ,QVWUXFWLRQVꢁ   
ꢁꢁ3URJUDPPLQJꢁ,QVWUXFWLRQVꢁ  
Ac c essories  
Notes  
29  
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  
/7ꢅꢉꢊꢊꢅꢆꢋꢌꢁ  
Porta ble Displa y FM  
7UDQVPLWWHUꢁꢒꢆꢋꢌꢁ0+]ꢓ  
/LVWHQꢀ&RQÀJXUDWLRQV  
‡ꢁ/7ꢅꢉꢊꢊꢅꢆꢋꢌ  
15  
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/7ꢁꢂꢃꢃꢁꢄꢅꢆꢀ6SHFLÀFDWLRQV  
$UFKLWHFWXUDOꢀ6SHFLÀFDWLRQ  
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ORFNHGꢀꢁ7KHꢁWUDQVPLWWHUꢁVKDOOꢁKDYHꢁDꢁ615ꢁRIꢁꢉꢊꢁGEꢁRUꢁJUHDWHUꢀꢁ7KHꢁRXWSXWꢁSRZHUꢁVKDOOꢁEHꢁDGMXVWDEOHꢁWRꢁTXDUWHUꢂꢁKDOIꢁRUꢁIXOOꢀꢁ7KHꢁGHYLFHꢁ  
VKDOOꢁKDYHꢁDQꢁDXGLRꢁIUHTXHQF\ꢁUHVSRQVHꢁRIꢁꢇꢊꢁ+]ꢁWRꢁꢍꢇꢁN+]ꢂꢁꢔꢐꢅꢌꢁG%ꢀꢁ7KHꢁGHYLFHꢁVKDOOꢁLQFRUSRUDWHꢁDꢁPLFURSKRQHꢁVHQVLWLYLW\ꢁVZLWFKꢀꢁ  
7KHꢁGHYLFHꢁVKDOOꢁLQFRUSRUDWHꢁDꢁPXWHꢁVZLWFKꢀꢁ7KHꢁXQLWꢁVKDOOꢁXWLOL]HꢁWZRꢁꢎꢁ$$ꢁEDWWHULHVꢀꢁ7KHꢁEDWWHU\ꢁGRRUꢁVKDOOꢁEHꢁFDSDEOHꢁRIꢁEHLQJꢁ  
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  
FLUFXLWU\ꢁIRUꢁUHFKDUJLQJꢁRIꢁ1L0+ꢁEDWWHULHVꢀꢁ7KHꢁ/LVWHQꢁ/7ꢅꢉꢊꢊꢅꢆꢋꢌꢁLVꢁVSHFLÀHGꢀ  
6SHFL¿FDWLRQV  
5)ꢀ)UHTXHQF\ꢀ5DQJH  
1XPEHUꢀRIꢀ&KDQQHOV  
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7UDQVPLVVLRQꢀ5DQJH  
2XWSXWꢀ3RZHU  
$QWHQQD  
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&RPSOLDQFH  
LT-700-863  
863.050 - 864.950 MHz  
ꢁꢂꢀZLGHꢀEDQG  
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50 PPM  
RF  
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ꢇꢃꢅꢀPPꢀFRQQHFWRU  
&(ꢍꢀ(76,ꢍꢀ5R+6  
6\VWHPꢀ)UHTXHQF\ꢀ  
5HVSRQVH  
ꢅꢄꢀ+]ꢀꢎꢀꢁꢅꢀN+]ꢀꢉ“ꢀꢇꢀG%ꢊ  
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PD[LPXPꢍꢀLPSHGDQFHꢀꢈꢁꢀRKPV  
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FRPSDUWPHQWꢊ  
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&RQWUROV  
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ORZꢍꢀRUꢀWRꢀLQGLFDWHꢀFKDUJLQJꢃꢀ)ODVKHVꢀZKHQꢀPXWHG  
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ꢉ/LVWHQꢀEDWWHULHVꢊ  
ꢁꢅꢀKRXUVꢀDONDOLQHꢀꢉ/$ꢎꢇꢋꢁꢊꢍꢀꢐꢀKRXUVꢀ1L0+ꢀUHFKDUJHDEOHꢀꢉ/$ꢎ  
ꢇꢋꢈꢊ  
3RZHU  
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ꢉ1L0+ꢀRQO\ꢊ  
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LT-700 Bloc k Diagram  
Up  
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  
18  
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LT-700 Quic k Referenc e  
ꢌꢀꢇPPꢁ,QSXWꢁ-DFNꢄꢁ&RQQHFWꢁDꢁ/LVWHQꢁPLFURSKRQHꢁKHUHꢀ  
/('ꢄꢁ:KHQꢁOLWꢂꢁLQGLFDWHVꢁXQLWꢁKDVꢁSRZHUꢂꢁ  
ZKHQꢁÁDVKLQJꢁXQLWꢁLVꢁPXWHGꢐFKDUJLQJꢀ  
0XWHꢁ2Qꢐ2IIꢁVZLWFK  
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.  
3RZHUꢐ&KDUJLQJꢁ3RUt  
3RZHUꢁ%XWWRQꢄꢁ7XUQVꢁ  
SRZHUꢁ2Qꢐ2IIꢀ  
Front Door Loc k  
%DWWHU\ꢁ6HOHFWꢁ6ZLWFKꢄꢁ&KRRVHꢁ  
the type of ba tteries being  
used.  
&KDQQHOꢁ6HOHFWꢁ%XWWRQV  
%DWWHU\ꢁ&RPSDUWPHQWꢄꢁ3ODFHꢁ  
ꢎꢅ$$ꢁEDWWHULHVꢁLQꢁFRPSDUWPHQWꢀꢁ  
%HꢁVXUHꢁWRꢁIROORZꢁSRODULW\ꢁ  
pa ttern.  
&KDQQHOꢁ'LVSOD\ꢄꢁ'LVSOD\VꢁWKHꢁ  
FKDQQHOꢁWKHꢁ/7ꢅꢉꢊꢊꢁLVꢁFXUUHQWO\ꢁRQ.  
RF Output  
,QGLFDWRUꢄꢁ,QGLFDWHVꢁ  
the RF tra nsmit  
level.  
%DWWHU\ꢁ/HYHOꢁ,QGLFDWRU  
/ꢐ2ꢄꢁ,QGLFDWHVꢁZKLOHꢁLQꢁ  
3URJUDPꢄꢁ  
func tion is in  
proc ess.  
SURJUDPPLQJꢁPRGHꢁWKHꢁVSHFLÀFꢁ  
c ha nnel ha s been loc ked out.  
/RFNꢁ,FRQꢄꢁ,QGLFDWHVꢁWKHꢁXQLWꢁLVꢁ  
loc ked on c urrent c ha nnel.  
19  
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LT-700 Setup Instruc tions  
1
Unpack the Product  
5HPRYHꢁRXWHUꢁSDFNDJLQJꢁDQGꢁSODVWLFꢁFRYHUꢀꢁ,QVSHFWꢁIRUꢁSK\VLFDOꢁGDPDJHꢀꢁ,IꢁGDPDJHꢁLVꢁDSSDUHQWꢂꢁSOHDVHꢁ  
c onta c t the dea ler from whic h the produc t wa s purc ha sed or Listen Tec hnologies  
&RUSRUDWLRQꢁWHFKQLFDOꢁVXSSRUWꢁIRUꢁDVVLVWDQFHꢁꢒUHIHUꢁWRꢁSDJHꢁꢋꢉꢁIRUꢁFRQWDFWꢁLQIRUPDWLRQꢓꢀ  
2
Open the front access door  
,IꢁORFNHGꢂꢁXVHꢁDꢁSRFNHWNQLIHꢁRUꢁVPDOOꢁVFUHZGULYHUꢁWRꢁXQORFNꢁWKHꢁGRRUꢁORFNVꢁRQꢁERWKꢁVLGHVꢁRIꢁWKHꢁXQLWꢀꢁ  
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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3
Select Battery Type  
7ZRꢁW\SHVꢁRIꢁEDWWHULHVꢁPD\ꢁEHꢁXVHGꢄꢁ1L0+ꢁRUꢁ$ONDOLQHꢀꢁ7KHꢁXQLWꢁLVꢁVKLSSHGꢁZLWKꢁWKHꢁVZLWFKꢁLQꢁWKHꢁ$ONDOLQHꢁ  
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  
KDUPꢇꢀGHVWUXFWLRQꢀRIꢀSURSHUW\ꢀ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.  
%DWWHU\ꢁVHOHFWꢁVZLWFK  
20  
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LT-700 Setup Instruc tions  
Set Mic Sensitivity Switch  
4
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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UHFRPPHQGVꢁWKHꢁIROORZLQJꢁVHWWLQJVꢁIRUꢁRXUꢁPLFURSKRQHVꢀꢁ,Iꢁ\RXꢁDUHꢁXVLQJꢁDꢁPLFURSKRQHꢁIURPꢁ  
a nother vendor, you ma y need to experiment with different settings.  
Part # Description Setting  
/$ꢅꢎꢋꢍꢁꢁ /DYDOLHUꢁ0LFURSKRQH  
/$ꢅꢎꢋꢎꢁꢁ 2YHUꢅWKHꢅ+HDGꢁ0LFURSKRQH  
/$ꢅꢎꢉꢎꢁꢁ 2YHUꢅWKHꢅ+HDGꢁ0LFURSKRQHꢁZꢐ(DUSKRQH  
/$ꢅꢎꢉꢏꢁꢁ +DQGꢁ+HOGꢁ0LFURSKRQH  
/$ꢅꢎꢉꢋꢁꢁ &ROODUꢁ0LFURSKRQH  
/$ꢅꢎꢉꢉꢁꢁ %HKLQGꢅWKHꢅ+HDGꢁ0LFURSKRQH  
/$ꢅꢎꢉꢆꢁꢁ &RQIHUHQFHꢁ0LFURSKRQH  
5
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  
EDWWHU\ꢁFRPSDUWPHQWꢂꢁDQGꢁDJDLQꢁYHULI\LQJꢁWKDWꢁWKHꢁ%$77(5<ꢁ6(/(&7ꢁVZLWFKꢁLVꢁLQꢁWKHꢁFRUUHFWꢁSRVLWLRQꢁ  
IRUꢁWKHꢁEDWWHULHVꢁ\RXꢁDUHꢁXVLQJꢀꢁꢒ$ONDOLQHꢁVKRXOGꢁEHꢁVHOHFWHGꢁIRUꢁDOOꢁEDWWHU\ꢁW\SHVꢁRWKHUꢁWKDQꢁ1L0+ꢓꢀ  
+
-
-
+
21  
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LT-700 Setup Instruc tions  
6
Connect the Microphone  
The mic rophone ja c k is loc a ted on top of the unit.  
7
Connect the Line Input Cable (Optional)  
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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.  
22  
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LT-700 Operating Instruc tions  
1
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  
2
Ra ise the a ntenna to the ully upright, it will c lic k  
into position.  
NOTE: Be aware that the antenna is  
not in an upright p
3
Select the channel for t
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ꢒUHIHUꢁWRꢁ&KDQQHOꢁ6HOHFHVꢁRQꢁFKRRVLQJꢁDQꢁ  
interferenc e free c ha nnel.  
23  
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LT-700 Operating Instruc tions  
7
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 .  
1
To lock on a channel  
1A  
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.  
24  
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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.  
1
The “PG M” ic on on the LC D will a ppea r indic a ting progra m mode is entered.  
2
25  
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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.  
3
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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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4
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4A  
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the progra mming menu.  
4C  
Pressing a nd holding power for a full 4 sec onds will exit both progra mming func tion a nd progra mming menu.  
26  
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LT-700 Programming Instruc tions  
Resetting to defaults  
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3
Reset to default settings  
Press and hold the Up and Down channel buttons while turning the unit on.  
4A  
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.  
4B  
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  
ꢎꢉ  
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Ac c essories for LT-700  
Accessories  
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La va lier Mic rophone  
/$ꢅꢎꢉꢏꢁ  
/$ꢅꢎꢉꢋꢁ  
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Ha nd Held Mic rophone  
C olla r Mic rophone  
C onferenc e Mic rophone  
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High C a pa c ity AA Alka line  
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28  
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Notes  
29  
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Notes  
30  
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Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
LR-400/500 User’s Manual Table of Contents  
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LR-400/500 Pac kage Contents  
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Quic k Referenc e C a rd  
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35  
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The rec eiver sha ll be c a pa ble of seeking c ha nnels. The devic e sha ll be a ble to be loc ked on a single  
c ha nnel. The devic e sha ll ha ve a n a djusta ble squelc h. The devic e sha ll ha ve a n a udio frequenc y  
UHVSRQVHꢁRIꢁꢇꢊꢁ+]ꢁWRꢁꢍꢇꢁ.+]ꢂꢁ“ꢌꢁG%ꢀꢁ7KHꢁGHYLFHꢁZLOOꢁLQFRUSRUDWHꢁDꢁVWHUHRꢁKHDGVHWꢁMDFNꢁWKDWꢁDOORZVꢁWKHꢁ  
user to plug in either a mono or stereo hea dset. The devic e sha ll inc orpora te a n LC D displa y tha t  
indic a tes c ha nnel, ba ttery level, low ba ttery, ba ttery c ha rging, a nd RF signa l strength. The rec eiver  
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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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863.050 - 864.950 MHz  
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38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
LR-400/500 Bloc k Diagram  
Up  
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  
On  
Off  
ANTENNA  
RF  
C ompa nding  
Q-Tec hnology  
de-empha sis  
de-modula tion  
VOLUME  
Tip  
3.5 mm C onnec tor  
Sleeve  
Ring  
39  
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LR-400-863 Quic k Referenc e  
ꢌꢀꢇꢁPPꢁ2XWSXWꢁ-DFNꢄꢁ&RQQHFWꢁDꢁOLVWHQꢁHDUSLHFHꢁKHUHꢀ  
Artic ula ting Flexible Antenna  
/('ꢄꢁ:KHQꢁOLWꢂꢁLQGLFDWHVꢁXQLWꢁKDVꢁSRZHUꢀ  
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.  
&KDQQHOꢁ6HOHFWꢁ%XWWRQV  
%DWWHU\ꢁ&RPSDUWPHQWꢄꢁ3ODFHꢁ  
ꢎꢅ$$ꢁEDWWHULHVꢁLQꢁFRPSDUWPHQWꢀꢁ  
%HꢁVXUHꢁWRꢁIROORZꢁSRODULW\ꢁ  
pa ttern.  
&KDQQHOꢁ'LVSOD\ꢄꢁ'LVSOD\VꢁWKHꢁ  
FKDQQHOꢁWKHꢁ/5ꢅꢏꢊꢊꢁLVꢁFXUUHQWO\ꢁRQꢀ  
5)ꢁ,QSXWꢁ,QGLFDWRUꢄꢁ  
,QGLFDWHVꢁWKHꢁ5)ꢁUHFHLYHꢁ  
level.  
%DWWHU\ꢁ/HYHOꢁ,QGLFDWRU  
/RFNꢁ,FRQꢄꢁ,QGLFDWHVꢁWKHꢁXQLWꢁLVꢁ  
loc ked on c urrent c ha nnel.  
40  
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LR-500-863 Quic k Referenc e  
ꢌꢀꢇꢁPPꢁ2XWSXWꢁ-DFNꢄꢁ&RQQHFWꢁDꢁOLVWHQꢁHDUSLHFHꢁKHUHꢀ  
/('ꢄꢁ:KHQꢁOLWꢂꢁLQGLFDWHVꢁXQLWꢁKDVꢁSRZHUꢀ  
2Qꢐ2IIꢁDQGꢁ9ROXPHꢁ&RQWUROꢁ'LDO  
Artic ula ting Flexible Antenna  
/RRN /LVWHQŒꢁ'LVSOD\ꢄꢁ  
Shows rec eive level, c ha nnel,  
progra mming, ba ttery  
sta tus, a nd loc k sta tus.  
3RZHUꢐ&KDUJLQJꢁ3RUt  
6((.ꢁ%XWWRQꢄꢁ$OORZVꢁWKHꢁ  
user to c ha nge c ha nnels  
or loc k on a c ha nnel.  
Front Door Loc k  
%DWWHU\ꢁ6HOHFWꢁ6ZLWFKꢄꢁ&KRRVHꢁ  
the type of ba tteries being  
used.  
&KDQQHOꢁ6HOHFWꢁ%XWWRQV  
%DWWHU\ꢁ&RPSDUWPHQWꢄꢁ3ODFHꢁ  
ꢎꢅ$$ꢁEDWWHULHVꢁLQꢁFRPSDUWPHQWꢀꢁ  
%HꢁVXUHꢁWRꢁIROORZꢁSRODULW\ꢁ  
pa ttern.  
&KDQQHOꢁ'LVSOD\ꢄꢁ'LVSOD\VꢁWKHꢁ  
FKDQQHOꢁWKHꢁ/5ꢅꢇꢊꢊꢁLVꢁFXUUHQWO\ꢁRQꢀ  
5)ꢁ,QSXWꢁ  
,QGLFDWRUꢄꢁ  
,QGLFDWHVꢁWKHꢁ  
RF rec eive  
level.  
%DWWHU\ꢁ/HYHOꢁ,QGLFDWRU  
/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  
41  
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LR-400/500 Setup Instruc tions  
1
2
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  
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Open the front access door  
,IꢁORFNHGꢂꢁXVHꢁDꢁSRFNHWNQLIHꢁRUꢁVPDOOꢁVFUHZGULYHUꢁWRꢁXQORFNꢁWKHꢁGRRUꢁORFNVꢁRQꢁERWKꢁVLGHVꢁRIꢁ  
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  
\RXUꢁWKXPEꢁDQGꢁLQGH[ꢁÀQJHUꢁDQGꢁSXOOꢁWKHꢁGRRUꢁGRZQZDUGꢀꢁ'2ꢁ127ꢁSODFHꢁEDWWHULHVꢁLQꢁWKHꢁ  
unit a t this time.  
Select Battery Type  
3
7ZRꢁW\SHVꢁRIꢁEDWWHULHVꢁPD\ꢁEHꢁXVHGꢄꢁ7KHꢁXQLWꢁLVꢁVKLSSHGꢁZLWKꢁWKHꢁVZLWFKꢁLQꢁWKHꢁ$ONDOLQHꢁSRVLWLRQꢀꢁ  
Use a pen or sma ll sc rewdriver to selec t the ba ttery type.  
%DWWHU\ꢁVHOHFWꢁVZLWFK  
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.  
42  
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LR-400/500 Setup Instruc tions  
Place Batteries in Unit  
4
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  
FRPSDUWPHQWꢂꢁDQGꢁDJDLQꢁYHULI\LQJꢁWKDWꢁWKHꢁ%$77(5<ꢁ6(/(&7ꢁVZLWFKꢁLVꢁLQꢁWKHꢁFRUUHFWꢁSRVLWLRQꢁIRUꢁWKHꢁ  
EDWWHULHVꢁ\RXꢁDUHꢁXVLQJꢀꢁꢒ$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.  
+
-
-
+
5
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.  
43  
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LR-400/500 Setup Instruc tions  
6
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.  
44  
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LR-400/500 Operating Instruc tions  
1
Turn Unit On  
1A  
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  
2
2A  
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.  
3
Select a Channel  
3A  
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.  
45  
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LR-400/500 Operating Instruc tions  
Select the channel using SEEK  
3A  
$QRWKHUꢁZD\ꢁWRꢁÀQGꢁDꢁFKDQQHOꢁRQꢁWKHꢁ/5ꢅꢏꢊꢊꢐꢇꢊꢊꢁLVꢁWRꢁXVHꢁWKHꢁ6((.ꢁEXWWRQꢀꢁ  
When you do this, the Listen rec eiver looks for the next a c tive c ha nnel.  
6RPHWLPHVꢁWKHꢁXQLWꢁZLOOꢁPLVWDNHꢁLQWHUIHUHQFHꢁIRUꢁDꢁUHDOꢁEURDGFDVWꢁVLJQDOꢀꢁ,Iꢁ\RXꢁ  
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.  
4
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.  
46  
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LR-400/500 Operating Instruc tions  
Locking the Receiver on One Channel  
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tiple systems a re in the sa me a rea .  
1
To lock on a channel  
1A  
Press and hold the SEEK button for 5 seconds  
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c ha nnel. Press a nd hold the button a ga in to unloc k. When loc ked the LED on top of  
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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.  
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LR-400/500 Operating Instruc tions  
Squelch Programming  
Entering Squelch Program Mode  
1
Turn unit off  
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2
3
the unit on.  
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displa y is seen.  
Adjusting the Squelch level  
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pa ge 49 for settings.  
1
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.  
2
3
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NOTE: Keep in mind, low squelc h may allow multipath and squelc h c hattering at long distanc es.  
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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.  
48  
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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  
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  
0
1
2
GRHVQ·WꢁVTXHOFKꢁWKHꢁUHFHLYHUꢀ  
If the receiver is close to the transmitter, set the squelch high  
3
ꢒGHIDXOWꢓ  
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DꢁFODVVURRPꢓꢂꢁVHWꢁWKHꢁVTXHOFKꢁVHWWLQJꢁKLJKꢁVRꢁWKDWꢁZKHQꢁWKHꢁ  
tra nsmitter is turned off it immedia tely squelc hes a nd ignores  
tra nsmitters in other rooms.  
4
5
6
If in an area that has a lot of interference, set the squelch high  
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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.  
8
9
10  
11  
12  
13  
14  
15  
16  
ꢍꢉ  
18  
19  
20  
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.  
49  
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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  
1
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.  
1B  
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1C  
1D  
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  
1
1A  
1B  
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  
50  
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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  
1
While the unit is ON, press a nd hold the c ha nnel down a nd up buttons simulta neously for 3 sec onds.  
1A  
The “PG M” ic on on the LC D will a ppea r indic a ting progra m mode is a c tive.  
1B  
2
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 n  
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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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3
3A  
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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.  
3C  
51  
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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  
/$ꢅꢌꢋꢍ  
Stereo Hea dphones  
/$ꢅꢌꢊꢏ  
High C a pa c ity AA Alka line  
Assistive Listening  
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%DWWHULHVꢁꢒꢎꢓꢁ  
/$ꢅꢌꢋꢎ  
Rec ha rgea ble AA NiMH  
%DWWHULHVꢁꢒꢎꢓ  
/$ꢅꢌꢍꢍꢁꢁꢍꢋꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVH  
/$ꢅꢌꢍꢌꢁꢁꢍꢋꢅ8QLWꢁ3RUWDEOHꢁ&DUU\LQJꢁ&DVH  
/$ꢅꢌꢍꢉꢁꢁꢏꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVH  
/$ꢅꢌꢍꢆꢁꢁꢏꢅ8QLWꢁ3RUWDEOHꢁ&DUU\LQJꢁ&DVH  
/$ꢅꢌꢎꢊꢁꢁ&RQÀJXUDEOHꢁ&DUU\LQJꢁ&DVH  
/$ꢅꢌꢎꢍꢁꢁꢆꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVH  
/$ꢅꢌꢎꢎꢁꢁꢆꢅ8QLWꢁ3RUWDEOHꢁ&DUU\LQJꢁ&DVH  
/$ꢅꢌꢎꢌꢁꢁꢏꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVHꢁZꢐ5HPRYDEOHꢁ/LG  
/$ꢅꢌꢎꢏꢁꢁꢆꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVHꢁZꢐ5HPRYDEOHꢁ/LG  
/$ꢅꢌꢎꢇꢁꢁꢍꢋꢅ8QLWꢁ3RUWDEOHꢁ&KDUJLQJꢐ&DUU\LQJꢁ&DVHꢁZꢐ5HPRYDEOHꢁ/LG  
52  
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Notes  
53  
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Notes  
54  
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Supplementary Information Table of Contents  
Frequenc y C ha rt  
61  
ꢋꢎ  
63  
65  
ꢋꢉ  
68  
%DWWHU\ꢁ&KDUJLQJꢁ,QIRUPDWLRQꢁ   
Troubleshooting  
Frequently Asked Questions  
&RPSOLDQFHꢂꢁ:DUUDQW\ꢁDQGꢁ&RQWDFWꢁ,QIRUPDWLRQꢁ   
Notes  
59  
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Frequenc y Chart  
Frequencies  
61  
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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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QHFHVVDU\ꢁWRꢁXQSOXJꢁWKHꢁFKDUJHUꢕꢁKRZHYHUꢂꢁLIꢁ\RXꢁXQSOXJꢁWKHꢁXQLWꢁIURPꢁWKHꢁFKDUJHUꢁDQGꢁWKHQꢁSOXJꢁLWꢁEDFNꢁLQꢂꢁLWꢁZLOOꢁEHJLQꢁWKHꢁꢍꢌꢅKRXUꢁFKDUJHꢁ  
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  
62  
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Troubleshooting  
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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DOOꢁWKHꢁZD\ꢁLQWRꢁWKHꢁLQSXWꢁMDFNꢀꢁ0DNHꢁVXUHꢁ\RXꢁDUHꢁXVLQJꢁDꢁ/LVWHQꢁDSSURYHGꢁPLFURSKRQHꢁꢒVHHꢁOLVWꢁRQꢁ  
SDJHꢁꢎꢍꢓꢀꢁ,Iꢁ\RXꢁDUHꢁXVLQJꢁWKHꢁOLQHꢁLQSXWꢂꢁPDNHꢁVXUHꢁ\RXꢁKDYHꢁFRQQHFWHGꢁDꢁOLQHꢁOHYHOꢂꢁXQEDODQFHGꢁLQSXWꢁ  
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  
DUHꢁSODFHGꢁÀUPO\ꢁLQꢁWKHꢁMDFNꢁꢀ  
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.  
7KHꢁPLFꢁVHQVLWLYLW\ꢁVZLWFKꢁPD\ꢁEHꢁRQꢁWKHꢁZURQJꢁVHWWLQJꢂꢁꢒVHHꢁSDJHꢁꢎꢍꢓꢀꢁ7U\ꢁDꢁGLIIHUHQWꢁVHWWLQJꢁꢒWKHꢁVZLWFKꢁ  
LVꢁORFDWHGꢁLQVLGHꢁWKHꢁEDWWHU\ꢁFRPSDUWPHQWꢓꢀꢁ6RPHꢁPLFURSKRQHVꢁKDYHꢁGLUHFWLRQDOꢁSLFNXSVꢂꢁHQVXUHꢁWKDWꢁ  
WKHꢁPLFURSKRQHꢁLQꢁXVHꢁLVꢁRULHQWHGꢁDQGꢁSRVLWLRQHGꢁSURSHUO\ꢁꢒSRLQWLQJꢁDWꢁWKHꢁVSHDNHUVꢁPRXWKꢓꢀꢁ  
7KHꢁPLFURSKRQHꢁPXVWꢁEHꢁLQꢁFORVHꢁSUR[LPLW\ꢁWRꢁWKHꢁSHUVRQꢁZKRꢁLVꢁVSHDNLQJꢀꢁ,IꢁWKLVꢁGRHVꢁQRWꢁZRUNꢂꢁWU\ꢁXVLQJꢁ  
DꢁKHDGꢅZRUQꢁPLFURSKRQHꢀ  
There is too muc h noise.  
7KLVꢁLVꢁPRVWꢁOLNHO\ꢁEHFDXVHꢁWKHꢁPLFURSKRQHꢁLVꢁQRWꢁFORVHꢁHQRXJKꢁWRꢁWKHꢁWDONHU·VꢁPRXWKꢂꢁDQGꢁLWꢁLVꢁSLFNLQJꢁXSꢁ  
ba c kground noise. Try positioning the mic rophone c loser or try using a mic rophone tha t is direc tiona l  
ꢒVXFKꢁDVꢁDꢁKHDGꢅZRUQꢁPLFꢓꢀꢁ7U\ꢁDQRWKHUꢁVHWWLQJꢁRQꢁWKHꢁPLFꢁVHQVLWLYLW\ꢁVZLWFKꢁꢒORFDWHGꢁLQVLGHꢁWKHꢁEDWWHU\ꢁ  
FRPSDUWPHQWꢓꢀꢁ  
There is interferenc e.  
7U\ꢁGLIIHUHQWꢁIUHTXHQFLHVꢁWRꢁÀQGꢁDꢁFOHDUꢁFKDQQHOꢀꢁ8VHꢁDꢁUHFHLYHUꢁWRꢁVZHHSꢁWKHꢁDUHDꢁZLWKRXWꢁDQ\  
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.  
8VHꢁWKHꢁ352*5$0ꢁIXQFWLRQꢁꢒ/7ꢅꢉꢊꢊꢁDQGꢁ/5ꢅꢇꢊꢊꢁRQO\ꢓꢁWRꢁORFNꢁRXWꢁXQZDQWHGꢁFKDQQHOVꢀꢁ8VHUVꢁZLOOꢁRQO\ꢁEHꢁ  
a ble to sc roll through a va ila ble c ha nnels.  
I c annot c hange the c hannel.  
7KHꢁWUDQVPLWWHUꢁRUꢁUHFHLYHUꢁPD\ꢁEHꢁORFNHGꢁRQꢁDꢁFKDQQHOꢁꢒFKHFNꢁIRUꢁWKHꢁSDGORFNꢁLFRQꢓꢀꢁ7RꢁXQORFNꢂꢁSUHVVꢁ  
a nd hold the UP or DOWN button for 5 sec onds.  
63  
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Troubleshooting  
Troubleshooting  
My batteries are not c harging  
0DNHꢁVXUHꢁ\RXꢁDUHꢁXVLQJꢁ1L0+ꢁEDWWHULHVꢁDQGꢁWKDWꢁWKHꢁ%$77(5<ꢁ6(/(&7ꢁVZLWFKꢁꢒLQVLGHꢁWKHꢁEDWWHU\ꢁ  
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).  
64  
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Frequently Asked Questions  
Frequently Asked Questions  
'ARꢁ,ꢁQHHGꢁDꢁWUDQVPLWWHUꢁIRUꢁHDFKꢁDXGLRꢁVRXUFH"  
Q
Q
Q
Yes. To tra nsmit two different frequenc ies, there must be two sepa ra te tra nsmitters.  
:AKDWꢁLVꢁWKHꢁUDQJHꢁRIꢁWKHꢁ/7ꢅꢉꢊꢊꢁ7UDQVPLWWHU"  
7KHꢁUDQJHꢁRIꢁWKHꢁ/7ꢅꢉꢊꢊꢁZLOOꢁGHSHQGꢁXSRQꢁWKHꢁSRZHUꢁVHWWLQJꢁDQGꢁLQWHUIHUHQFHꢁꢒUHIHUꢁWRꢁSDJHꢁꢆꢓꢀꢁ  
ꢁꢁꢁꢁꢁꢁꢁ*HQHUDOO\ꢁWKHꢁUDQJHꢁLVꢁXSꢁWRꢁꢋꢍꢁPꢁꢒꢎꢊꢊꢁIWꢀꢓꢀ  
,VꢁWKHUHꢁDꢁOLPLWꢁWRꢁWKHꢁQXPEHUꢁRIꢁWUDQVPLWWHUVꢁ,ꢁFDQꢁXVHꢁLQꢁRQHꢁURRP"  
<HVꢀꢁ/LVWHQꢁUHFRPPHQGVꢁWKDWꢁQRꢁPRUHꢁWKDWꢁꢆꢁFKDQQHOVꢁDUHꢁLQꢁXVHGꢁVLPXOWDQHRXVO\ꢁꢒUHIHUꢁWRꢁSDJHꢁꢑꢁꢁRQꢁ  
XVLQJꢁPXOWLSOHꢁFKDQQHOVꢁLQꢁWKHꢁVDPHꢁURRPꢓꢀ  
A
:AKDWꢁUHFLHYHUꢁVKRXOGꢁEHꢁXVHGꢁZLWKꢁPXOWLSOHꢁWUDVPLWWHUV"ꢁ  
Q
Q
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a nd c a n loc k out unused c ha nnels.  
+RZꢁPDQ\ꢁFKDQQHOVꢁFDQꢁ,ꢁSURJUDPꢁLQWRꢁWKHꢁ/5ꢅꢇꢊꢊ"ꢁ  
ꢍꢁWRꢁꢍꢉꢀꢁ7KHꢁUHFHLYHUꢁKDVꢁꢍꢉꢁFKDQQHOVꢁDQGꢁ\RXꢁFDQꢁSURJUDPꢁLWꢁWRꢁKDYHꢁMXVWꢁWKHꢁFKDQQHOVꢁ\RXꢁZDQWꢁ  
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A
+RZꢁPDQ\ꢁUHFHLYHUVꢁFDQꢁ,ꢁKDYHꢁLQꢁDꢁV\VWHP"ꢁ  
Q
Q
As ma ny a s you need, the number is endless.  
A
:AKDWꢁDUHꢁWKHꢁPDMRUꢁGLIIHUHQFHVꢁEHWZHHQꢁWKHꢁ/5ꢅꢏꢊꢊꢁDQGꢁWKHꢁ/5ꢅꢇꢊꢊ"  
%RWKꢁUHFHLYHUVꢁFDQꢁWXQHꢁWRꢁꢍꢉꢁEURDGEDQGꢁFKDQQHOVꢀꢁ+RZHYHUꢂꢁWKHꢁ/5ꢅꢏꢊꢊꢁKDVꢁWKHꢁEXWWRQVꢁXQGHUꢁ  
WKHꢁEDWWHU\ꢁFRPSDUWPHQWꢁGRRUꢁDQGꢁWKHꢁ/5ꢅꢏꢊꢊꢁLVꢁQRWꢁSURJUDPPDEOHꢁWRꢁORFNꢁRXWꢁFKDQQHOVꢀꢁ,Iꢁ\RXꢁ  
SODQꢁWRꢁXVHꢁRQHꢁUHFHLYHUꢁZLWKꢁPXOWLSOHꢁWUDQVPLWWHUVꢁ\RXꢁVKRXOGꢁXVHꢁWKHꢁ/5ꢅꢇꢊꢊꢁZKLFKꢁLVꢁ  
progra mma ble to just those c ha nnels you need.  
:AKDWꢁLVꢁWKHꢁEDWWHU\ꢁOLIHꢁRIꢁWKHꢁ/7ꢅꢉꢊꢊꢁ7UDQVPLWWHU"ꢁ  
Q
Fifteen hours a lka line. Eight hours NiMH.  
65  
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Frequently Asked Questions  
Frequently Asked Questions  
&ADQꢁWKHꢁUHFHLYHUꢁEHꢁ´ORFNHGµꢁRQꢁDꢁFKDQQHOꢁLIꢁQHHGHG"ꢁ  
Q
Q
Yes. All Listen rec eivers c a n be loc ked on a single c ha nnel.  
:KDWꢁLVꢁWKHꢁEDWWHU\ꢁOLIHꢁRIꢁDꢁUHFHLYHU"  
20 hours using a lka line ba tteries. 10 hours using NiMH ba tteries.  
A
66  
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Complianc e, Warranty and Contac t Information  
Compliance Information  
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7KHVHꢁGHYLFHVꢁFRPSO\ꢁZLWKꢁ(76,ꢁ(1ꢁꢌꢊꢍꢁꢌꢇꢉ  
These devic es a re C E c omplia nt.  
These devic es a re RoHS c omplia nt.  
Warranty  
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/5ꢅꢍꢊꢊꢂꢁ/5ꢅꢌꢊꢊꢂꢁ/5ꢅꢏꢊꢊꢂꢁ/5ꢅꢇꢊꢊꢁDQGꢁ/5ꢅꢋꢊꢊꢓꢁWRꢁEHꢁIUHHꢁIURPꢁGHIHFWVꢁLQꢁZRUNPDQVKLSꢁDQGꢁPDWHULDOꢁXQGHUꢁQRUPDOꢁXVHꢁ  
a nd c onditions for the useful lifetime of the produc t from da te of purc ha se.  
/LVWHQꢁZDUUDQWVꢁLW·Vꢁ6WDWLRQDU\ꢁ,5ꢁ5DGLDWRUVꢁꢒ/$ꢅꢍꢏꢊꢓꢁWRꢁEHꢁIUHHꢁIURPꢁGHIHFWVꢁLQꢁZRUNPDQVKLSꢁDQGꢁPDWHULDOꢁXQGHUꢁQRUꢅ  
ma l use a nd c onditions for three yea rs from the da te of purc ha se.  
/LVWHQꢁZDUUDQWVꢁLWVꢁ1RLVHꢁ&DQFHOLQJꢁ0LFURSKRQHꢁꢒ/$ꢅꢎꢉꢊꢓꢁWRꢁEHꢁIUHHꢁIURPꢁGHIHFWVꢁLQꢁZRUNPDQVKLSꢁDQGꢁPDWHULDOꢁXQGHUꢁ  
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  
PRGLÀHGꢁE\ꢁDQ\RQHꢁRWKHUꢁWKDQꢁDꢁIDFWRU\ꢁDXWKRUL]HGꢁVHUYLFHꢁWHFKQLFLDQꢀꢁ:DUUDQW\ꢁGRHVꢁQRWꢁFRYHUꢁQRUPDOꢁZHDUꢁDQGꢁ  
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  
,IꢁWHFKQLFDOꢁVHUYLFHꢁLVꢁQHHGHGꢂꢁSOHDVHꢁFRQWDFWꢁ/LVWHQꢀꢁ3UHꢅDXWKRUL]DWLRQꢁLVꢁUHTXLUHGꢁEHIRUHꢁUHWXUQLQJꢁ/LVWHQꢁSURGXFWVꢀꢁ,IꢁSURGXFWVꢁZHUHꢁ  
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.  
$OOꢁ/LVWHQꢁ(XURSHDQꢁPDUNHWVꢁDUHꢁVXSSRUWHGꢁWKURXJKꢁWKHꢁ/LVWHQꢁ7HFKQRORJLHVꢁ*PE+ꢁRIÀFHꢁORFDWHGꢁLQꢁ2EHUDVEDFKꢂꢁ*HUPDQ\ꢀꢁ)RUꢁ  
more informa tion on Listen solutions, c onta c t Listen Tec hnologies a t +1.801.233.8992, +1.800.330.0891 North Americ a ,  
/LVWHQꢁ7HFKQRORJLHVꢁ*PE+ꢁDWꢁꢔꢏꢑꢁꢑꢍꢍꢁꢑꢇꢇꢍꢇꢑꢅꢊꢁRUꢁYLVLWꢁZZZꢀOLVWHQWHFKꢀFRPꢀꢁ)RUꢁ(XURSHꢂꢁ0LGGOHꢁ(DVWꢂꢁ$IULFDꢁDQGꢁ,QGLDꢁRIÀFHꢁYLVLWꢁ  
www.listentec h.de.  
14912 Herita gec rest wa y  
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+1.801.233.8992  
Listen Tec hnologies G mbH  
Ja sminstr.16, 90522 Obera sba c h, G erma ny  
Europe  
+49 911 955 159 0  
North Americ a  
Fa x  
+1.800.330.0891  
+49 911 955 159 40  
Fa x  
+1.801.233.8995  
support@listentec h.de  
www.listentec h.de  
support@listentec h.c om  
www.listentec h.c om  
ꢋꢉ  
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Notes  
68  
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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  
info@listentec h.c om  
Listen Tec hnologies G mbH  
Ja sminstr. 16  
905 22 Obera sba c h, G erma ny  
(0($,  
+49 911 955159 0  
Fa x  
+49 911 955159 40  
www.listentec h.de  
info@listentec h.de  
Printed in the United Sta tes of Americ a  
®
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