Listen Technologies Stereo Receiver LA 123 90 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  
sa tised. Tha ts why we independently c ertify them to the highest qua lity  
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  
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servic e, we’re here to listen.  
Here’s how to rea c h us:  
+1.801.233.8992  
North Americ a  
+1.800.330.0891  
fa x  
+1.801.233.8995  
support@listentec h.c om  
www.listentec h.c om  
Tha nk you a nd enjoy your listening experienc e!  
Best rega rds,  
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  
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Assistive Listening • La ngua ge Interpreta tion • Soundeld • Tour G roup • C onferenc ing  
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Value Pac kage Table of Contents  
Design G uide  
FM Tec hnology Overview  
System Overview  
5
6
Key C onc epts in Va lue Pa c ka ge Setup  
Alterna tive Options for Va lue Pa c ka ge Setup  
Notes  
7
11  
13  
LT-803-072 Sta tiona ry FM Tra nsmitter  
Spec ic a tions  
20  
21  
22  
23  
25  
29  
30  
Bloc k Dia gra m  
Quic k Referenc e  
Setup Instruc tions  
Opera ting Instruc tions  
Ac c essories  
Notes  
LR-200-072 FM Rec eiver  
Spec ic a tions  
Bloc k Dia gra m  
Quic k Referenc e  
Setup Instruc tions  
Ac c essories  
36  
37  
38  
39  
42  
43  
Notes  
Supplementa ry Informa tion  
Ba ttery C ha rging Informa tion  
Frequenc y C ha rt  
50  
51  
52  
54  
55  
57  
Troubleshooting  
Frequently Asked Questions  
C omplia nc e, Wa rra nty a nd C onta c t Informa tion  
Notes  
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Value Pac kage Design Guide Table of Contents  
FM Tec hnology Overview  
5
6
System Overview  
Key C onc epts in Va lue Pa c ka ge Setup  
Alterna tive Options for Va lue Pa c ka ge Setup  
Notes  
7
11  
13  
Value Pac kage Contents  
• (1) LT-803-072 Sta tiona ry 3-C ha nnel FM Tra nsmitter  
• (4) LR-200-072 Sta nda rd 3-C ha nnel FM Rec eiver  
• (1) LA-123 90° Helic a l Antenna  
LA-161 Single Ea r Bud  
• (4) LA-161 Single Ea r Bud  
• (1) LA-304 Assistive Listening Notic a tion Signa ge Kit  
• (1) LA-207 12 VDC Power Supply  
• (1) Insta lla tion G uide  
72  
R
E
IV  
E
C
E
R
D
R
A
D
N
A
T
S
LT-803-072 Sta tiona ry 3-C ha nnel FM Tra nsmitter  
LR-200-072 Sta nda rd 3-C ha nnel FM Rec eiver  
12 VDC Power Supply  
This fa c ility is e quippe d with  
he a ring a ssista nc e syste m.  
Ple a se a sk for a re c e ive r.  
a
LA-123 90° Helic a l Antenna  
LA-304 Assitive Listening  
Notic a tion Signa ge Kit  
Insta lla tion G uide  
3
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Frequenc y Modulation (FM) Tec hnology Overview  
Frequenc y modula tion or (FM) is a mea ns of tra nsmitting a udio using elec troma gnetic wa ves. This sa me  
tec hnology is used by loc a l FM ra dio sta tions to broa dc a st music . FM signa ls c a n tra vel through most ba rriers  
wa lls, oors, a nd c eilings. The dista nc e a signa l tra vels ha s ma ny different va ria bles suc h a s Ra dio Frequenc y  
(RF) output power, the type a nd pla c ement of the a ntenna , a nd the broa dc a sted frequenc y. Unlike infra red,  
FM tra nsmission a re not sec ure. This ena bles a rec eiver to tra vel further dista nc es from the sourc e. This sec tion of  
the ma nua l will help you design a system tha t will get the best ra nge a nd lea st a mount of interferenc e.  
Audio Mixer  
72  
ER  
V
EI  
EC  
R
D
R
A
D
N
A
ST  
FM Rec eiver  
FM Tra nsmitter  
Audio Sourc e  
5
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System Overview  
There a re four ma in c omponents to the Va lue Pa c ka ge – the tra nsmitter, a ntenna , rec eiver a nd input sourc e.  
Input Source  
The input sourc e c a n be a udio from a sound boa rd, mic rophone or a persona l a udio sourc e like a C D pla yer,  
MP3 pla yer, c omputer, DVD, etc . Audio will be c onnec ted into the a udio inputs of the Sta tiona ry Tra nsmitter.  
Transmitter  
The LT-803-072 tra nsmitter modula tes the a udio on a n FM c a rrier a nd tra nsmits the signa l via a n a ntenna .  
LT-803-072 Sta tiona ry 3-C ha nnel  
FM Tra nsmitter (72 MHz)  
Antenna  
The LP-3C V-072 inc ludes the LA-123 90° Helic a l Antenna . This a ntenna ha s a BNC c onnec tor a nd should be  
mounted on the ba c k of the LT-803-072. For further a ntenna options see pa ge 11.  
LA-123 90° Helic a l Antenna  
Receivers  
The LR-200-072 rec eiver c a ptures the signa l sent from the tra nsmitter a nd outputs it into the LA-161 Single ea r  
bud. Listen offers a va riety of rec eivers.  
LR-200-072 Sta nda rd 3-C ha nnel  
FM Rec eiver (72 MHz)  
72  
R
IVE  
CE  
ARD RE  
AND  
ST  
6
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Key Conc epts in Value Pac kage Setup  
Input Selection  
The LT-803-072 ha s two a udio input options: Input 1 a nd Input 2. Input 1 is a ba la nc ed c onnec tion using either a n  
XLR or ¼ in. phono c onnec tor, a nd input 2 is two unba la nc ed 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 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.  
Ba la nc ed XLR or  
1/4 in. phono c onnec tor  
Unba la nc ed right  
a nd left phono  
c onnec tors  
Input 1: Connecting the audio source  
Input 1 offers a c hoic e of ba la nc ed XLR or ¼ in. phono c onnec tor. Plug a n a udio sourc e into Input 1: move the  
input selec t switc h to the type of input sourc e being used. Selec t “Linefor Line Inputs, Mic ” for dyna mic  
mic rophones or “Mic + PH Power” for c ondenser mic rophones. A ba la nc ed feed from a soundboa rd c a n a lso  
be used with Input 1.  
Input 2: Connect the audio source  
Plug your unba la nc ed a udio sourc e into Input 2 a nd selec t the a udio level switc h for -10 dBu or +10 dBu to  
ma tc h the a udio level c oming from your equipment.  
7
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Key Conc epts in Value Pac kage Setup  
Using Multiple inputs  
The LT-803-072 c a n a c c ommoda te multiple inputs simulta neously with the use of the input level  
potentiometer. When multiple inputs a re present, both input level lights will be a c tiva ted.  
Input Level Knob  
Mix Level  
The mix level a c ts a s the ma ster tra nsmit” c ontrol. It will inc rea se the tra nsmit ga in on the mix” of the two  
levels (if two levels a re in use).  
Mix Level Adjustment  
8
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Key Conc epts in Value Pac kage Setup  
Selecting Transmitting Frequencies  
Use this sec tion of the guide to c hoose the c ha nnel settings for the tra nsmitter a nd rec eivers.  
Find transmission channel(s)  
The goa l is to nd a tra nsmission c ha nnel(s) tha t is free from interferenc e. Interferenc e c omes from  
tra nsmitters a nd other outside FM signa ls.  
Listen’s LT-803-072 offers 3 different channels to choose from  
With 3 different c ha nnels to c hoose from, the c ha nc e of nding a n interferenc e free c ha nnel is inc rea sed.  
The best wa y to c hec k for interferenc e is to turn the LR-200-072 on a nd listen to ea c h c ha nnel. Tra nsmit on the  
c ha nnel tha t ha s the lea st a mount of noise.  
Testing System  
Monitor Jack  
The hea dphone ja c k is used to monitor the mix of input 1 & 2. You c a n a djust the monitor level with the volume  
knob. The hea dphone ja c k is a sta nda rd 3.5 mm ja c k.  
3
Hea dphone  
Monitoring Ja c k  
Test Tone  
Use the test tone to tra nsmit a 400 Hz tone. This tone will a llow the end user to know if the system is tra nsmitting  
properly. All rec eivers should be a ble to hea r this tone if tuned to the proper c ha nnel.  
Test Tone Button  
9
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Key Conc epts in Value Pac kage Setup  
Antenna placement (rear)  
Rear mounted antenna  
Rea r mounting the LA-123 90° Helic a l Antenna (72 MHz) will a llow the tra nsmitter to be moved if nec essa ry.  
Maximizing Transmission Range  
For proper a nd dependa ble opera tion, Listen rec eivers need to rec eive a strong a nd c onsistent signa l from the  
origina ting tra nsmitter. The following stra tegies should be used to ma ximize this signa l:  
Transmitting antenna  
When designing a nd insta lling your system, keep in mind tha t the loc a tion of both the tra nsmitting a nd  
rec eiving a ntenna s is c ritic a l to ma ximize broa dc a st ra nge. Minimize the dista nc e a nd remove a ny obstruc tions  
between the tra nsmitting a nd rec eiving a ntenna s. Keep tra nsmitting a nd rec eiving a ntenna s (rec eiver ea rphone  
c ord) a wa y from meta l or c onduc tive objec ts.  
RF Power switch  
Position the RF Power switc h on the ba c k of the LT-803-072 to full RF Power, unless lower power is nec essa ry.  
Low, med or high RF power  
10  
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Alternative Options for Value Pac kage Setup  
Remote antenna  
The LA-122 Universa l Antenna Kit (72 a nd 216 MHz) a nd the LA-116 C oa xia l Dipole Remote Antenna (72 MHz)  
c onnec t to the LT-803-072 a nd c a n be pla c ed a wa y from the tra nsmitter for better ra nge. They a lso a llow the  
unit to be ra c k mounted with the a ntenna remotely using the LA-326 Universa l Ra c k Mounting Kit. Both the  
LA-122 a nd LA-116 c ome with 25’ of bla c k c oa xia l c a ble (RG -58).  
ATTENTION: Long c able runs c an result in signal degradation due to the “loss” c harac teristic s of the c able.  
Minimize c able runs as muc h as possible or use “low loss” RG-8 c able.  
LA-122 Universa l Antenna Kit (72 a nd 216 MHz)  
LA-116 C oa xia l Dipole  
Remote Antenna (72 MHz)  
Receiver Options  
Listen offers a va riety of porta ble a nd sta tiona ry rec eivers. Ea c h rec eiver offers different fea tures to help further c us-  
tomize your FM system.  
ATTENTION: The SQ “Super Quiet” function must be turned OFF for better audio quality when using the LT-803-072  
contained in this Value Package.  
LR-500-072  
LR-400-072  
Porta ble Displa y FM Rec eiver  
(72 MHz)  
LR-300-072  
Porta ble Digita l FM Rec eiver  
(72 MHz)  
Porta ble Progra mma ble Displa y FM Rec eiver  
(72 MHz)  
Up  
RF Power  
Mute  
Squelch  
Channel  
Speaker  
Seek  
LR-100  
Output Level  
Power  
Headphone  
Down  
LR-100-072  
Sta tiona ry FM Rec eiver/ Power Amplier  
(72 MHz)  
LR-600-072  
Wireless FM Rec eiver/Spea ker  
(72 MHz)  
11  
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Key Conc epts in Value Pac kage Setup  
Rack Mounting the Transmitter  
The LT-803-072 c a n be ra c k mounted if nec essa ry. With the use of the Listen LA-326 Universa l Ra c k Mount Kit,  
you c a n mount one or two tra nsmitters to the sta nda rd 19” ra c k. The ra c k mounted unit will ta ke 1 ru of spa c e.  
LT-803 FM Transmitter  
LT-803 FM Transmitter  
Ra c k Mount with dua l units insta lled.  
LT-803 FM Transmitter  
Ra c k Mount with single unit insta lled.  
The a ntenna c a n a lso be in the front of the ra c k with the use of the LA-125 Antenna Kit for Ra c k Mount  
(72 MHz) a nd the LA-326 Universa l Ra c k Mounting Kit.  
LT-803 FM Transmitter  
Ra c k Mount with single unit a nd externa l a ntenna insta lled.  
NOTE: The antenna may need to be remote mounted using the LA-122 Remote Antenna Kit if the transmitter(s) is  
rac k mounted. If a rac k is metal, it is not rec ommended to have the antenna inside. Also, the depth of the rac k and  
equipment inside c ould prevent an antenna from being plac ed inside.  
12  
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Notes  
13  
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Notes  
14  
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LT-803-072 User’s Manual Table of Contents  
Spec ic a tions  
Bloc k Dia gra m  
Quic k Referenc e  
Setup Instruc tions  
Opera ting Instruc tions  
Ac c essories  
20  
21  
22  
23  
25  
29  
30  
Notes  
Listen Congurations  
• LT-803-072-01 (North Americ a )  
• LT-803-072-02 (Asia /UK)  
• LT-803-072-03 (Euro)  
LT-803-072 Pac kage Contents  
• (1) LT-803-072 Sta tiona ry 3-C ha nnel FM Tra nsmitter  
• (1) LA-207 12 VDC Power Supply  
• (1) Quic k Referenc e C a rd  
LT-803-072 Sta tiona ry 3-C ha nnel FM Tra nsmitter  
12 VDC Power Supply  
Quic k Referenc e C a rd  
18  
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LT-803-072 Spec ic ations  
Architectural Specication  
The Sta tiona ry FM Tra nsmitter sha ll be c a pa ble of broa dc a sting on one of a ny three c ha nnels – A (72.100 MHz),  
E (72.900 MHz) or H (75.900 MHz). The tra nsmitter sha ll ha ve a SNR of 62 dB or grea ter. The output power sha ll be  
a djusta ble to qua rter, ha lf or full. C ha nnel tuning sha ll be c a pa ble of being loc ked. The devic e sha ll ha ve a n a udio  
frequenc y response of 50 Hz to 15k Hz, ± 3 dB a t 72 MHz. It sha ll ha ve two (2) mixing a udio inputs. The devic e sha ll  
ha ve the following a udio c ontrols: input level, mix level a nd a n a djusta ble low pa ss lter (c ontour). The devic e sha ll  
ha ve a n a udio proc essor tha t is c a pa ble of a utoma tic ga in c ontrol a nd limiting. The Listen LT-803-072 is spec ied.  
Specifications  
RF Frequency Range  
LT-803-072  
(A) 72.100, (E) 72.900, (H) 75.900  
3 wide band  
Number of Channels  
Frequency Accuracy  
Transmitter Stability  
Transmittion Range  
Output Power  
+/-.005% stability 32˚ to 122˚F (0˚- 50˚C)  
50 PPM  
Up to 1,500 ft. (457.20 m)  
80,000uV at 3 m  
RF  
Antenna  
Various antennas available  
BNC  
Antenna Connector  
Compliance  
FCC Part 15, Part 90, Industry Canada  
** All system specifications are wireless end-to-end  
System Frequency Response  
System Signal to Noise Ratio  
System Distortion  
50 Hz - 15 kHz ( 3 dB)  
62 dB (A-Weighted)  
<2% total harmonic distortion (THD) at 80% deviation  
Rear panel, one (1) Female-XLR and ¼ in. combo connector, balanced, 0/-55 dBu (line/mic) nominal input level  
adjustable, -30/+21 dBu (line/mic) maximum input level, impedance 20k/1k Ohm (line/mic),  
phantom power +12 VDC.  
Audio Input 1  
Audio  
Audio Input 2  
Rear panel, two (2) Phono connectors, unbalanced, -10/+10 dBu nominal input level adjustable, +30 dBu maximum, impedance 100k Ohms.  
Compression can be turned on/off. Slope internally adjustable from 1:1 to 4:1. Default 2:1  
Cuts and boosts frequencies above 5 kHz  
Audio Processing (Process)  
Contour  
Input 1 and input 2, mixed output (rear panel), two (2) phono connectors, unbalanced, -10 dBu nominal output level, +15 dBu maximum,  
impedance 10 ohm.  
Combined Audio Output (Mix)  
Headphone Output (monitor)  
Front panel, one (1) 3.5 mm (0.14 in.) stereo connector, unbalanced, adjustable output level, +3 dBu maximum, impedance 10 Ohm.  
Front Panel  
Power, Test Tone on/off, Channel UP/DOWN, Input levels, Mix level, Contour, Monitor volume control  
Input 1 Level (line, mic, mic-phantom power), Input 2 Level (-10/+10 dBu), RF Power level (low, mid, high)  
Compression ratio for audio processor  
Rear Panel  
Controls  
Internal Adjustments  
Programming  
Process on/off. Channel lock  
Input 1, Input 2, Mix Level VU  
Processing  
Indicates Input 1, Input 2, and Mix audio levels; 10 segment LED’s (8 green, 2 red)  
Indicated by a green LED when on (front panel)  
Indicators  
RF Power  
Indicated on the LCD (low, mid, high)  
LCD Display  
Channel designation, lock status, RF Power Level, programming (front panel)  
Red LED illuminates when test tone is enabled  
Test Tone  
Power Supply  
In-line power supply. Listen part number LA-207 (line cord is determined by each country’s AC power standards  
Input: 100-240 VAC, 50-60 Hz. 0.4 A  
Power Supply Input  
Power Supply Output  
Power Supply Connector  
Power Supply Compliance  
Output: 12 VDC, 1.3 A, 15.6 W  
Power  
Output Connector: 0.02 in. (5.0 mm) OD, 0 .01 in. (2.5 mm) ID, barrel type  
UL, CE GS, TUV, RoHS  
Dimensions (H x W x D)  
Color  
8.50 x 1.75 x 9.12 in. (21.6 x 4.45 x 21.16 cm)  
Dark grey with white silk screening  
2.6 lbs. (1.2 kg)  
Unit Weight  
Unit Weight with LA-207-01 Power  
Supply  
Physical  
3.5 lbs. (1.6 kg)  
Shipping Weight  
4.5 lbs. (2.0 kg)  
One (1) rack space height, 1/2 rack space wide. One (1) or two (2) transmitters can be mounted in one rack space, optional rack mount  
(LA-326)  
Rack Mounting  
Temperature - Operation  
Temperature - Storage  
-10˚C (14˚F) to +40˚C (104˚F)  
-20˚C (-4˚F) to +50˚C (122˚F)  
Environmental  
Humidity  
0 to 95% Relative Humidity, non condensing  
20  
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LT-803-072 Bloc k Diagram  
POWER  
On  
Off  
115/230VAC  
50/60 Hz  
Universa l Power  
Supply (provided)  
12VDC , 1.3A  
Power Supply  
C PU Module  
Down  
MONITOR  
Volume  
Listen LC D  
Displa y Ba c klit  
C ompression Ra tio  
(interna l a djustment)  
MIX Level  
VU Meter  
ANTENNA  
Tra nsmitter  
RF Boa rd  
Pre-empha sis  
Proc essing  
BNC  
G reen LED  
MIX LEVEL  
Low  
High  
On  
Off  
Func tions c ontrolled by  
the C PU Module  
Mid  
RF POWER  
PROC ESS  
C ONTOUR  
Input 1 VU Meter  
Input 2 VU Meter  
Input Level  
Front Pa nel  
12VDC  
Input Level  
Selec t Mic -Pha ntom Pwr, Mic , Line  
Line  
Mic  
Mic  
Pha ntom Pwr  
Test Tone Button  
Front Pa nel  
Input Level  
Selec t Mic -Pha ntom Pwr, Mic , Line  
OFF  
ON  
+10dBu  
-10dBu  
Red LED  
Fema le XLR 1/4’  
C ombo C onnec tor  
Phono  
Phono  
400Hz  
2/Tip 3/Ring  
1/Sleeve  
INPUT 1  
INPUT 2  
MIX OUTPUT  
TEST TONE  
21  
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LT-803-072 Quic k Referenc e  
Mix Level: Shows mixed a udio output level.  
Input 1 and 2:  
Adjust a udio input levels of  
Input 1 a nd Input 2 here.  
Process LED: Indic a tes a udio proc essing mode is a c tive.  
Press a nd hold the down button for 10  
sec onds to a c tiva te progra m mode. Press  
up button to toggle proc ess On/Off.  
Input Level Indicators:  
Shows a udio Input 1  
a nd Input 2 levels.  
Monitor Jack: Plug in ea rphone(s)  
to monitor a udio.  
LT-803 FM Transmitter  
Monitor Level:  
Adjust the Monitor  
output volume.  
Test Tone: Ac tiva tes a tone  
to a id system setup.  
LCD Display: See LC D  
displa y quic k referenc e.  
Power Button: Turns unit On/Off.  
Contour: Equa liza tion a djustment;  
boosts or c uts high frequenc ies.  
Channel Select UP/DOWN:  
Use to selec t c ha nnel  
(A,E,H). Buttons a lso used  
for progra mming func tions.  
Mix Transmit Levels: Adjusts the a mount of  
mixed a udio being tra nsmitted.  
RF Output Indicator:  
Indic a tes tra nsmitted  
RF power level.  
PGM: Indic a tes the unit is in progra m mode.  
Channel Display: Displa ys the c urrent c ha nnel.  
Lock Icon: Indic a tes the unit is loc ked on c urrent  
c ha nnel. Hold C ha nnel up button for 3  
sec onds to loc k On/Off c ha nnel.  
Power Input: C onnec t  
power supply here.  
Input 2: Unba la nc ed a udio inputs (stereo or mono).  
Audio Outputs:  
Input 1 a nd input 2  
mixed for a line output.  
Input 2 Level Switch: Set switc h to  
ma tc h the level of your Input 2 sourc e.  
RF Power Level:  
Low, Med or  
High RF power.  
Input 1: Ba la nc ed input  
for c onnec tion of a line  
level or mic rophone;  
a c c epts either a XLR or  
¼” phono plug.  
Input 1 Level Switch: Set  
switc h for line or mic  
level. Pha ntom power  
a va ila ble in Mic -PH  
power position.  
Top Mounted Antenna Output :  
Sc rew termina l for top  
mounted a ntenna .  
RF Antenna Output:  
BNC c onnec tor for  
a ntenna (50 Ohm).  
22  
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LT-803-072 Setup Instruc tions  
Unpack the Product  
1
2
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-803-072(s) in Rack (if desired)  
If ra c k mounting the tra nsmitter(s), insta ll the optiona l ra c k mount kit (LA-326) a c c ording to the  
instruc tions inc luded with the kit.  
LT-803 FM Transmitter  
LT-803 FM Transmitter  
LT-803 FM Transmitter  
Ra c k Mount with single unit insta lled.  
Ra c k Mount with dua l units insta lled.  
Connect Antenna  
3
4
C onnec t a ntenna to rea r of tra nsmitter.  
Connect Power  
Plug the power supply into the power c onnec tor on the ba c k pa nel. Plug the power supply into a n  
outlet. Only use a Listen a pproved power supply (12 VDC ).  
23  
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LT-803-072 Setup Instruc tions  
Set RF power  
5
Set the RF POWER switc h on the ba c k of the unit to High, Medium, or Low (Level is indic a ted on the  
LC D displa y by number of dots a bove Listen logo). The a mount of tra nsmitted RF power tha t you will  
need depends on your a pplic a tion. If you a re opera ting multiple tra nsmitters in the sa me environment,  
it is best to set the tra nsmitters output power to its lowest level to reduc e the possibility of interferenc e.  
Low, Med or High RF power  
Connect Audio Inputs  
6
The LT-803-072 ha s two (2) a udio input options: Input 1 a nd Input 2. Input 1 is a ba la nc ed c onnec tion  
using either a n XLR or ¼ in. 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.  
Input 1  
6A  
Input 1 offers a c hoic e of ba la nc ed XLR or ¼ in. phono c onnec tor. Plug a n a udio sourc e into Input 1: move  
the input selec t switc h to the type of input sourc e being used. Selec t “Linefor Line Inputs, Mic ” for dyna mic  
mic rophones or “Mic + PH Power” for c ondenser mic rophones. A ba la nc ed feed from a soundboa rd c a n  
a lso be used with Input 1.  
XLR Wiring  
1/4 in. Phono Wiring  
Ba la nc ed  
Unba la nc ed  
Tip  
Ring  
Sleeve  
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  
Sourc e  
6B  
Input 2  
Plug your unba la nc ed a udio sourc e into Input 2 a nd selec t the a udio level switc h for -10 dBu or +10  
dBu, to ma tc h the a udio level c oming from your equipment.  
24  
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LT-803-072 Operating Instruc tions  
Power Unit On  
1
Power Button  
Select a Channel  
2
Selec t the tra nsmit c ha nnel (A, E, H) by pressing the c ha nnel selec t UP/DOWN buttons.  
C ha nnel selec t UP/DOWN  
buttons  
Lock on Channel  
3
Onc e you determine your tra nsmit c ha nnel, you c a n loc k the tra nsmitter on tha t c ha nnel. To loc k  
a c ha nnel hold the C ha nnel Selec t UP button for 3 sec onds until the pa dloc k ic on a ppea rs on the  
displa y. To unloc k, repea t this proc ess a nd the pa dloc k ic on will disa ppea r.  
25  
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LT-803-072 Operating Instruc tions  
4
Test Tone (if necessary)  
Use the test tone to tra nsmit a 400 Hz tone. This tone will a llow the rec eiver to know if the system is  
tra nsmitting properly. All rec eivers should be a ble to hea r this tone if tuned to the proper c ha nnel.  
Test Tone Button  
Adjusting Audio Levels  
1
Adjust Audio Input Level  
Turn the input knob c ounter-c loc kwise to a dd ga in to Input 1. This will dec rea se ga in to Input 2.  
Turn input knob c loc kwise to a dd ga in to Input 2. This will dec rea se ga in to Input 1. If you ha ve two  
a udio sourc es c onnec ted to Input 1 a nd 2, a djust the level of one input using the VU meter, then  
a djust the output level of the other a udio sourc e. Adjust the input level until the left VU meter(s)  
oc c a siona lly illumina te the red LEDs. Illumina tion of the red LEDs indic a tes the unit is in limiting.  
Limiting is required so tha t the unit does not over-modula te the tra nsmit signa l. If you don’t wa nt  
a ny a udio limiting to oc c ur, ma ke sure the red LEDs never illumina te. If you wa nt a highly limited  
signa l, turn the a udio ga in up so the red LEDs illumina te often.  
Audio Input Level Knob  
26  
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LT-803-072 Operating Instruc tions  
2
Adjusting the Contour knob  
Turn the c ontour knob c ounter-c loc kwise if your a udio sourc e is mostly  
voic e. Turn the knob c loc kwise if your a udio sourc e is mostly music . The  
c ontour knob a djusts the rela tive equa liza tion of the unit. This  
equa liza tion boosts or c uts frequenc ies a bove 5 kHz.  
C ontour Knob  
3
Adjust Mix Level  
Adjust the mix level until the right VU meter oc c a siona lly illumina tes the  
red LED. This is the level a djustment for the c ombined output from Input  
1 a nd Input 2.  
Mix Level Adjustment Knob  
27  
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LT-803-072 Operating Instruc tions  
4
Process Mode  
Proc ess mode is used for Audio G a in C ontrol (AG C ). Press a nd hold the down button for 10 sec onds to  
a c tiva te progra m mode. Press up button to toggle proc ess On/Off. With the proc ess mode ena bled,  
the LT-803-072 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. 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 substa ntia lly. Typic a lly you would not wa nt to enga ge the Proc ess  
Mode when a spea kers empha sis is c ritic a l to the messa ge they a re c onveying.  
Proc ess  
28  
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Ac c essories for LT-803-072  
Accessories  
Antennas  
LA-80 2-Wa y RF Antenna C ombiner  
LA-81 4-Wa y RF Antenna C ombiner  
LA-82 6-Wa y RF Antenna C ombiner  
LA-101 Helic a l Top Mounted Antenna (72MHz)  
LA-106 Telesc oping Top Mounted Antenna (72 MHz)  
LA-116 C oa xia l Dipole Remote Antenna (72MHz)  
LA-122 Universa l Antenna Kit (72 a nd 216 MHz)  
LA-123 90˚ Helic a l Antenna (72 MHz)  
LA-125 Antenna Kit for Ra c k Mount (72 MHz)  
123  
Power Supply  
LA-207-01 12 VDC Repla c ement Power Supply for LT-803-072 (North Americ a )  
LA-207-02 12 VDC Repla c ement Power Supply for LT-803-072 (Asia , UK)  
LA-207-03 12 VDC Repla c ement Power Supply for LT-803-072 (Euro)  
LA-207  
Cables/ Connectors  
LA-112 RG -58 50 Ohm C oa xia l C a ble (Per ft.)  
LA-113 RG -8 50 Ohm Low-Loss C oa xia l C a ble (Per ft.)  
LA-115 RG -58 BNC C oupler  
LA-127 RG -58 BNC C onnec tor  
LA-128 RG -8 BNC C onnec tor  
LA-390 RG -8/50 Ohm Prea ssembled C oa xia l C a ble (Per ft.)  
LA-391 RG -58/50 Ohm Prea ssembled C oa xia l C a ble (Per ft.)  
LA-127  
LA-304  
Miscellaneous  
LA-304 Assistive Listening Notic a tion Signa ge Kit  
LA-326 Universa l Ra c k Mounting Kit  
29  
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Notes  
30  
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LR-200-072 User’s Manual Table of Contents  
Spec ic a tions  
Bloc k Dia gra m  
Quic k Referenc e  
Setup Instruc tions  
Ac c essories  
36  
37  
38  
39  
42  
43  
Notes  
Listen Congurations  
• LR-200-072  
LR-200-072 Pac kage Contents  
• (1) LR-200-072 Sta nda rd 3-C ha nnel FM Rec eiver (72 MHz)  
• (1) Quic k Referenc e C a rd  
72  
Quic k Referenc e C a rd  
LR-200-072  
Sta nda rd 3-C ha nnel  
FM Rec eiver  
(72 MHz)  
R
E
IV  
E
C
E
R
D
R
A
D
N
A
T
S
34  
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LR-200-072 Spec ic ations  
Architectural Specication  
The FM rec eiver sha ll be c a pa ble of rec eiving on three wide ba nd c ha nnels. The rec eiver sha ll ha ve a  
SNR of 62 dB or grea ter. The devic e sha ll ha ve a n a udio frequenc y response of 50 Hz to 15 KHz, ± 3 dB  
a t 72 MHz. The devic e sha ll inc orpora te a stereo hea dset ja c k tha t a llows the user to plug in either a  
mono or stereo ea rphone(s). The unit sha ll opera te with (2) AA 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 ba tteries. The devic e sha ll ha ve a  
switc ha ble option for the use of (2) a lka line or (2) NiMH ba tteries. The Listen LR-200-072 is spec ied.  
Spec ic a tions  
RF C ha nnel Ra nge  
LR-200-072  
(A) 72.100, (E) 72.900, (H) 75.900  
3 wide ba nd  
Number of C ha nnels  
Sensitivity  
.6 uV typic a l, 1 uV ma ximum for 12 dB sina d  
+/-.005% sta bility 32˚ to 122˚F (0˚ - 50˚C )  
Uses ea rphone c a ble  
Frequenc y Ac c ura c y  
Antenna  
RF  
Squelc h  
None  
C omplia nc e  
FC C Pa rt 15, Industry C a na da , RoHS  
** All system spec ic a tions a re wireless end-to-end  
System Frequenc y Response  
System Signa l to Noise Ra tio  
System Distortion  
50Hz - 15kHz (+/-3dB)  
62 dB  
Audio  
<2% tota l ha rmonic distortion (THD) a t 80% devia tion  
3.5 mm (0.14 in.) c onnec tors, unba la nc ed, 0 dBu nomina l output level, 16 mW ma ximum,  
impeda nc e 32 Ohms  
Output  
User C ontrols  
ON/OFF, volume  
Alka line/NiMH ba tteries, c ha nnel switc h  
None  
Set up C ontrols  
(ba ttery c ompa rtment)  
C ontrols  
Progra mming  
LED  
Red, illumina ted when unit is on or to indic a te c ha rging, a shes when ba tteries a re low.  
Indic a tors  
LC D Displa y  
None  
Ba ttery Type  
Two (2) AA ba tteries, a lka line or NiMH  
120 hours a lka line (LA-361), 75 hours NiMH rec ha rgea ble (LA-362)  
Fully a utoma tic , 10-12 hours under norma l use.  
Ba ttery Life (Listen Ba tteries)  
Ba ttery C ha rging (NiMH only)  
I/P 120VAC ; O/P 7.5VDC 250 mA; drop in c onta c t points for use with c ha rging c a ses.  
Power supply not inc luded (LA-202)  
Power  
Power Supply  
2.3 mm OD by 0.7 mm ID, ba rrel type c onnec tor, 7.5 VDC , c enter positive <250 mA.  
Drop in c onta c t points for use with Listen c ha rging c a ses.  
Power Supply C onnec tor  
Power Supply C omplia nc e  
RoHS, WEEE, UL, PSE, C E, C UL, TUV, C B c omplia nt  
Dimensions H x W x D  
C olor  
4.25 x 2.75 x 1.50 in. (10.8 x 7.0 x 3.8 c m)  
Da rk G rey with white silk sc reening a nd da rk lens  
3.1 oz. (88 g)  
Unit Weight  
Physic a l  
Unit Weight with ba tteries  
Shipping Weight  
Door  
5.2 oz. (147 g)  
5.8 oz. (164 g)  
Ma nua lly loc ka ble. SEEK behind the door.  
Tempera ture - Opera tion  
Tempera ture - Stora ge  
Humidity  
14˚ to 104˚F - (-10˚ to 40˚C )  
-4˚ to 122˚F - (-20˚ to 50˚C )  
Environmenta l  
0 to 95% rela tive humidity, non-c ondensing  
** Spec ic a tions a re subjec t to c ha nge without notic a tion  
36  
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LR-200-072 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  
de-empha sis  
de-modula tion  
VOLUME  
Tip  
3.5 mm C onnec tor  
Sleeve  
Ring  
37  
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LR-200-072 Quic k Referenc e  
3.5 mm Output Jack: C onnec t a Listen ea rphone(s) here.  
LED: When lit, unit is On or c ha rging.  
When ba tteries a re low, the LED a shes.  
On/Off and Volume Control Dial  
72  
Power/Charging Port  
Front Door Lock  
Battery Select Switch:  
C hoose the type of ba tteries  
being used - Alka line or NiMH.  
Battery Select  
NiMH  
ect  
Sel  
Alkaline  
Channel  
Channel Select Switch:  
There a re 3 sepa ra te c ha nnels  
(A, E, H) a va ila ble.  
Battery Compartment:  
Pla c e two (2) AA ba tteries in  
c ompa rtment. Be sure to  
follow pola rity pa ttern.  
38  
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LR-200-072 Setup Instruc tions  
1
2
Remove the product  
Remove outer pa c ka ging a nd pla stic c over. Inspec t for physic a l da ma ge. If da ma ge is a ppa rent,  
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 tion tec hnic a l support for a ssista nc e (refer to pa ge 55 for c onta c t informa tion).  
Open the front access door  
If loc ked, use a sma ll sc rewdriver to unloc k the door loc ks on both sides of 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 your thumb a nd  
index nger a nd pull the door downwa rd. DO NOT pla c e ba tteries in the unit a t this time.  
72  
t
lec  
tery Se  
Bat  
NiMH  
ect  
Sel  
el  
nn  
Alkaline  
Cha  
Select Battery Type  
3
Two types of ba tteries ma y be used: The unit is shipped with the switc h in the Alka line position.  
Use a pen or sma ll sc rewdriver to selec t the ba ttery type.  
T
Y SELEC  
TER  
T
BA  
72  
t
c
lec  
Se  
tery  
at  
Bat  
iMH  
N
e
n
el Select  
Ba ttery Selec t Switc h  
nn  
Alkalin
Cha  
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,  
destruc tion of property and/or re.  
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.  
39  
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LR-200-072 Setup Instruc tions  
Channel Select  
4
Set c ha nnel selec t switc h to desired c ha nnel (A, E, H). Ma ke  
sure tha t the c ha nnel on both rec eiver a nd tra nsmitter a re the  
sa me.  
C ha nnel Selec t Switc h  
Place Batteries in Unit  
5
Insert two AA ba tteries ma king note of the ba ttery  
pola rity shown in the ba ttery c ompa rtment, a nd a ga in  
verifying tha t the BATTERY SELEC T switc h is in the c orrec t  
position for the ba tteries you a re using. (Alka line should  
be selec ted for a ll ba ttery types other tha n NiMH).  
72  
+
t
lec  
Se  
tery  
Bat  
NiMH  
Select  
el  
nn  
Alkaline  
Cha  
NOTE: Listen provides industrial strength AA alkaline  
batteries (LA-361) and high performanc e AA  
Nic kel Metal Hydride batteries (LA-362). These  
may be purc hased from your Listen dealer.  
-
-
+
Connect an Earphone or Headset  
6
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.  
72  
VER  
ARD RECEI  
AND  
ST  
40  
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LR-200-072 Setup Instruc tions  
7
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 illumina te.  
If it does not, ma ke sure you ha ve insta lled the ba tteries  
c orrec tly a nd tha t you a re using fully c ha rged ba tteries.  
72  
R
E
IV  
E
C
E
R
D
R
A
D
N
A
T
S
Adjust the volume control  
8
Use the c ontrol dia l on the top of the unit to a djust the volume  
to a c omforta ble level.  
72  
RD RECEIVER  
A
AND  
ST  
41  
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Ac c essories for LR-200-072  
Accessories  
Headphones  
LA-161 Single Ea r Bud  
LA-162 Stereo Ea r Bud  
LA-164 Ea r Spea ker  
LA-165 Stereo Hea dphones  
LA-166 Nec k Loop  
LA-170 Behind-the-Hea d Stereo Hea dphones  
LA-171 Noise C a nc eling Hea dphones  
LA-170  
Power/Charging Supplies  
LA-202 Power/C ha rging Supply for FM Porta ble Produc ts  
LA-202  
Cables  
LA-265 C onsumer C a mc order C a ble  
LA-266 Professiona l C a mc order C a ble  
LA-275 Sa c ric ia l C a ble  
LA-266  
Charging/ Carrying Cases with Removable Lid  
LA-311-01 16-Unit Porta ble FM Produc t C ha rging/C a rrying C a se (North Americ a )  
LA-317-01 4-Unit Porta ble FM Produc t C ha rging/C a rrying C a se (North Americ a )  
LA-321-01 8-Unit Porta ble FM Produc t C ha rging/C a rrying C a se (North Americ a )  
LA-323-01 4-Unit Porta ble FM Produc t C ha rging/C a rrying C a se w/Remova ble Lid (North Americ a )  
LA-324-01 8-Unit Porta ble FM Produc t C ha rging/C a rrying C a se w/Remova ble Lid (North Americ a )  
LA-325-01 16-Unit Porta ble FM Produc t C ha rging/C a rrying C a se w/Remova ble Lid (North Americ a )  
LA-321  
Carrying Cases  
LA-306 Soft C a se (72 MHz & 216 MHz only)  
LA-313 16-Unit Porta ble FM Produc t C a rrying C a se  
LA-318 4-Unit Porta ble FM Produc t C a rrying C a se  
LA-319 Protec tive Pouc h for Porta ble FM Produc ts  
LA-320 C ongura ble C a rrying C a se  
LA-322 8-Unit Porta ble FM Produc t C a rrying C a se  
LA-320  
LA-362  
Miscellaneous  
LA-330 Porta ble Unit La nya rd  
LA-361 High C a pa c ity AA Alka line Ba tteries (2)  
LA-362 Rec ha rgea ble AA NiMH Ba tteries (2)  
42  
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Notes  
43  
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Notes  
44  
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Supplementary Information Table of Contents  
Ba ttery C ha rging Informa tion  
50  
51  
52  
54  
55  
57  
Frequenc y C ha rt  
Troubleshooting  
Frequently Asked Questions  
C omplia nc e, Wa rra nty a nd C onta c t Informa tion  
Notes  
48  
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Battery Charging Information  
The LR-200-072 rec eiver uses a tric kle c ha rging method. When one of these rec eivers is pla c ed into a Listen c ha rging c a se a ny NiMH  
ba tteries will be c ha rged. The entire c ha rging proc ess ta kes 10-12 hours under norma l c onditions.  
During the c ha rging c yc le, the red LED on top of the Listen produc t will rema in illumina ted.  
When not using the rec eiver, it is rec ommended to lea ve the unit in the c ha rging c a se or plugged into the LA-202 power sourc e.  
If the unit is not on the c ha rger, the ba ttery will lose up to 20% of its c ha rge per month.  
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 (LA-362).  
Charging with a drop-in charger  
To c ha rge the ba tteries using a drop-in c ha rging c a se, simply pla c e the unit into a slot in the c ha rging c a se  
a nd c onnec t the c a se to power. Ma ke sure the unit is fully sea ted in its slot.  
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Charging with the LA-202  
To c ha rge ba tteries using the LA-202 7.5 DC Power C ha rging Supply, plug the  
tra nsformer into the ja c k ma rked PWR/C HG a nd plug into AC Power sourc e.  
The unit c a n opera te while ba tteries a re being c ha rged If the ba ttery selec t  
switc h is in the NiMH position a nd NiMH ba tteries a re pla c ed inside.  
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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  
c harging non-NiMH batteries inc lude destruc tion of property or re.  
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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Frequenc y Chart  
Channel  
Frequency (MHz)  
72.100  
A
E
72.900  
H
75.900  
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Troubleshooting  
Troubleshooting  
The LT-803-072 has no power.  
Ma ke sure the 12 VDC power tra nsformer is c onnec ted to a power sourc e a nd is c onnec ted to the  
ja c k ma rked Power Input”. Ma ke sure the PWR button is pressed in.  
There is no audio or the audio level is too low.  
1. Ma ke sure tha t your a udio sourc e is properly c onnec ted to Input 1 a nd/or Input 2. The Input 1 or  
Input 2 switc hes must be in the c orrec t position for the a ppropria te input level. For exa mple: if you  
a re using the output of a mixer on Input 2, the switc h should be in the -10 dBu position. If it were to be  
in the +10 dBu position, the level would be too low. Also, c hec k the Input knob to ensure it is properly  
a djusted. You should be a ble to see illumina ted lights on the VU meter on Input 1 or Input 2  
c orresponding with the input level of the a udio sourc e. You c a n listen to the a udio sourc e by  
c onnec ting a hea dset to the front pa nel ja c k a nd a djusting the Monitor volume c ontrol.  
2. If the level of a udio into the tra nsmitter is low a nd c a nnot be c orrec ted using the level input switc hes,  
the a udio proc essor c a n be turned on to boost the signa l (see pa ge 28 for desc ription of Proc ess  
Mode).  
The audio is distorted.  
C hec k to ma ke sure you ha ve the input level selec t switc hes in the proper position. You ma y be  
providing too muc h a udio level for the input sta ge to ha ndle.  
There is hum in the audio.  
Ma ke sure you ha ve properly grounded the a udio sourc e to the LT-803-072. C hec k the c onnec tions  
from the a udio sourc e to the LT-803-072. If you c a n, try to use a ba la nc ed a udio sourc e - this will  
reduc e the c ha nc e of c rea ting hum. C onnec t a ground wire from the LT-803-072 to ground a nd/or to  
the ground of the sourc e a udio.  
There is a tone.  
The Test Tone button ha s been pressed (its LED light is on). Push the Test Tone button to turn off the tone.  
The Audio Input 1 sounds “tinny”.  
If you a re using a n unba la nc ed a udio sourc e, ma ke sure Pin 3 on the XLR or the ring on the ¼ in. plug is  
grounded .  
I c annot pic k up the signal on the rec eiver.  
C hec k to ma ke sure the rec eiver a nd the tra nsmitter a re on the sa me c ha nnel. Ma ke sure the  
LT-803-072 ha s a n a ntenna c onnec ted. Ensure tha t the rec eiver ha s a n ea rphone c onnec ted.  
I c an pic k up the signal on the rec eiver, but it sounds like it’s not tuned in.  
C hec k to ma ke sure the tra nsmitter a nd rec eiver a re on exa c tly the sa me c ha nnel. Its a good idea to  
loc k the c ha nnels onc e they ha ve been set. To loc k the LT-803-072, press the UP button for 3 sec onds.  
There is not sufc ient range.  
First ma ke sure tha t the rec eivers you a re using a re opera ting properly, then ma ke sure tha t you ha ve  
a n a ntenna c onnec ted either to the top of the LT-803-072 tra nsmitter or c onnec ted to the ba c k of the  
unit (but not both!). The a ntenna should be a s high a s possible a nd free of obsta c les. In a ddition, ma ke  
sure you a re using the c orrec t a ntenna type for your unit. You might wa nt to use a remote a ntenna  
[LA-122 Universa l Antenna Kit (72 MHz) or LA-116 C oa xia l Dipole Remote Antenna (72 MHz)] tha t c a n  
be mounted on a ma st or wa ll. Try using different frequenc ies to nd one with less interferenc e.  
(see pa ge 25 for informa tion rega rding c ha nnel selec tion)  
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Troubleshooting  
Troubleshooting  
There is interferenc e in my transmission.  
Ensure tha t the tra nsmitter a nd rec eivers a re on the sa me c ha nnel. Verify tha t there a re no other  
tra nsmitters on the sa me c ha nnel or a c lose c ha nnel to the one exhibiting interferenc e. Try  
different c ha nnels until you nd a c lea r c ha nnel. Plea se c onta c t Listen for more idea s on  
troubleshooting the interferenc e.  
End users are adjusting the unit.  
First, loc k the c ha nnel on the LT-803-072 by pressing a nd holding the c ha nnel selec t UP button for 3  
sec onds. C onsider removing the Input, Mix Level a nd C ontour knobs. You c a n order a ra c k mount  
kit (LA-326) from Listen whic h offers a sec urity c over tha t will limit a c c ess to the unit.  
I am using another manfac tures rec eiver with the LT-803-072.  
Listen’s 72 MHz equipment is c ompa tible with a ny other 72 MHz equipment.  
Several transmitters are operating in the same environment.  
Be sure ea c h tra nsmitter is using a sepera te frequenc y (A,E,H).  
Can I have two antenna’s c onnec ted to my transmitter.  
No. The LT-803-072 tra nsmitter c a n use only one a ntenna c onnec tion a t a time. You ma y c onnec t  
either a top mount a ntenna through the top a ntenna port, or a remote a ntenna c onnec ted to  
the BNC c onnec tion on the rea r of the unit. If multiple a ntenna s a re simulta neously c onnec ted to  
both ports the tra nsmitter will ha ve extremely poor broa dc a st performa nc e a nd ra nge.  
53  
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Frequently Asked Questions  
Frequently Asked Questions  
Wha t is the ra nge of the LT-803-072 tra nsmitter?  
Q
Q
Q
Q
Q
Line of site up to 1000 ft. (304.8 m).  
A
Does the LT-803-072 inc lude the ra c k mount?  
No, but a n LA-326 Universa l Ra c k Mounting Kit is a va ila ble for purc ha se.  
A
Do I need a tra nsmitter for ea c h a udio sourc e?  
Yes.  
A
Is there a limit to the number of tra nsmitters I c a n use in one room?  
Yes, a ma ximum of 3.  
A
How ma ny rec eivers c a n I ha ve on a system?  
As ma ny a s you wa nt. The tra nsmitter simply tra nsmits a signa l a nd you c a n ha ve a s ma ny  
rec eivers pic k tha t signa l up a s nec essa ry. Its like a ra dio sta tion tra nsmitting a nd the rec eivers a re  
the ra dios tuning into the c ha nnel.  
A
Wha t is the wa rra nty of LIsten tra nsmitters?  
Q
Q
Limited lifetime wa rra nty. The following c a ses will void the wa rra nty:  
• Misuse, dropping, or a ny other notic ea ble c osmetic da ma ge.  
A
WAha t a re the differenc es between the LR-200 a nd other Listen rec eivers?  
The LR-200 offers three (3) frequenc ies a nd c a n be c ha nged inside the door of the rec eiver via a switc h.  
The LR-200 does not ha ve a n LC D sc reen, the a bility to SEEK for open frequenc ies, SQ (Super Quiet) or  
progra mma bility. Also, the Signa l to Noise is 62 dB c ompa red to 80 dB on Listen’s other rec eivers.  
C a n the LR-200 be used with the LT-800-072?  
Q
Yes. The SQ func tion on the tra nsmitter must be turned off a nd the tra nsmitter c a n only be used with one  
A
of the three optiona l frequenc ies (A, E, H).  
C a n the LR-200 be used with the LT-700-072?  
Q
Q
Q
Q
No.  
A
Wha t is the ba ttery life of the LR-200-072  
120 hours a lka line. 75 hours NiMH.  
A
Wha t is the c ha rge time of the LR-200-072 using two (2) NiMH ba tteries?  
10-12 hours under norma l use.  
A
Wha t is the wa rra nty of Listen rec ievers?  
Limited lifetime wa rra nty. The following c a ses will void the wa rra nty:  
A
• Misuse, dropping, or a ny other notic ea ble c osmetic da ma ge.  
• C ha rging a lka line ba tteries instea d of NiMH.  
Overhea ting the c ha rging proc ess by c losing the lid on the c ha rging c a se.  
54  
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Complianc e Notic e and FCC Statement  
Compliance Notice  
This devic e c omplies with pa rt 15 of the FC C Rules. Opera tion is subjec t to the following two c onditions:  
(1) These devic es ma y not c a use ha rmful interferenc e, a nd (2) these devic es must a c c ept a ny  
interferenc e rec eived, inc luding interferenc e tha t ma y c a use undesira ble opera tion.  
Listen’s LT-800 Transmitter (216 MHz only)  
Listen’s LT-800 tra nsmitter is a uthorized by rule under the Low Power Ra dio Servic e (47 C .F.R. Pa rt 95) a nd  
must not c a use ha rmful interferenc e to TV rec eption or United Sta tes Na vy SPASUR insta lla tions. You do  
not need a n FC C lic ense to opera te these tra nsmitters. These tra nsmitters ma y only be used to provide:  
a uditory a ssista nc e to persons with disa bilities, persons who require la ngua ge tra nsla tion, or persons in  
educ a tiona l settings; hea lth c a re servic es to the ill; la w enforc ement tra c king servic es under a greement  
with a la w enforc ement a genc y; or a utoma ted ma ritime telec ommunic a tions system (AMTS) network  
c ontrol c ommunic a tions. Two-wa y voic e c ommunic a tions a nd a ll other types of uses not mentioned  
a bove a re expressly prohibited.  
This devic e must be insta lled by a tra ined a udio professiona l or c ertified dea ler of Listen. The user  
c a n’t ma ke a ny modific a tions to the unit without expressed written c onsent of Listen Tec hnologies  
C orpora tion. Any modific a tions ma de will void the FC C c omplia nc e, Listen wa rra nty a nd the users  
a uthority to opera te Listen’s equipment.  
FCC Statement  
This equipment ha s been tested a nd found to c omply with the limits for a c la ss B digita l devic e, pursua nt  
to pa rt 15 of the FC C Rules. These limits a re designed to provide rea sona ble protec tion a ga inst ha rmful  
interferenc e in a residentia l insta lla tion. This equipment genera tes, uses a nd c a n ra dia te ra dio frequenc y  
energy a nd if not insta lled a nd used in a c c orda nc e with the instruc tions, ma y c a use ha rmful interferenc e  
to ra dio c ommunic a tions. However, there is no gua ra ntee tha t interferenc e will not oc c ur in a pa rtic ula r  
insta lla tion. If this equipment does c a use ha rmful interferenc e to ra dio or television rec eption, whic h c a n  
be determined by turning the equipment off a nd on, the user is enc oura ged to try to c orrec t the  
interferenc e by one or more of the following mea sures:  
Reorient or reloc a te the rec eiving a ntenna .  
Inc rea se the sepa ra tion between the equipment a nd rec eiver.  
C onnec t the equipment into a n outlet on a c irc uit different from tha t to whic h the rec eiver is  
c onnec ted.  
C onsult the dea ler or a n experienc ed ra dio/TV tec hnic ia n for help.  
This equipment ha s been c ertified to c omply with the limits for a c la ss B c omputing devic e, pursua nt to  
FC C a nd IC Rules. In order to ma inta in c omplia nc e with FC C a nd IC regula tions, shielded c a bles must  
be used with this equipment. Opera tion with non-a pproved equipment or unshielded c a bles is likely to  
result in interferenc e to ra dio a nd TV rec eption. The user is c a utioned tha t c ha nges a nd modific a tions  
ma de to the equipment without the a pprova l of ma nufa c turer c ould void the users a uthority to opera te  
this equipment.  
55  
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Warranty and Contac t Information  
Warranty  
Listen Tec hnologies C orpora tion (Listen) wa rra nts its tra nsmitters a nd rec eivers (models LT-700, LT-800, LT-803, LR-42,  
LR-44, LR-100, LR-200, LR-300, LR-400, LR-500 a nd 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-311, LA-313, LA-317, LA-318, 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, 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  
modied by a nyone other tha n a fa c tory a uthorized 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.  
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  
use of a ny equipment sold by it. Listen spec ic a lly disc la ims a nd nega tes a ny wa rra nty of merc ha nta bility or tness  
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.  
In the rst ninety da ys a fter purc ha se, a ny defec tive produc t will be repla c ed with a new unit. After 90 da ys, Listen  
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  
a nd c ondition ba sed on a a t fee.  
This limited wa rra nty, pric es a nd the spec ic a tions of produc ts a re subjec t to c ha nge without notic e.  
Contacting Listen  
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.  
All Listen Europea n ma rkets a re supported through the Listen Tec hnologies G mbH ofc e loc a ted in Obera sba c h, G erma ny. For  
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 ,  
Listen Tec hnologies G mbH a t +49 911 955159-0 or visit www.listentec h.c om. For Europe, Middle Ea st, Afric a a nd India ofc e visit  
www.listentec h.de.  
14912 Herita gec rest wa y  
Bluffda le, Uta h U.S.A. 84065-4818  
+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  
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Notes  
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Notes  
58  
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Listen Tec hnologies C orpora tion  
14912 Herita gec rest Wa y  
Bluffda le, Uta h 84065-4818, U.S.A.  
+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  
EMEAI  
+49 911 955159 0  
Fa x  
+49 911 955159 40  
www.listentec h.de  
info@listentec h.de  
© 2008 Listen Tec hnologies C orpora tion® All Rights Reserved 20080129  
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