Page 3 - VHUYLFHZH·UHKHUHWROLVWHQ; Lifetime Warranty – the best in the business!
Dear Valued Customer, Thank you for choosing Listen! All of us at Listen are dedicated to providing you with the highest quality products available. We take great pride in their outstanding performance because we care that you are completely VDWLVÀHG7KDW·VZK\ZHLQGHSHQGHQWO\FHUWLI\WKHPWRWKHKLJKHVWTXD...
Page 5 - SHUDWLQJ,QVWUXFWLRQV; Portable FM Table of Contents
Design Guide LT-700 LR-400/500 Supplementary Design Guide FM Technology Overview 5 System Overview 6 .H\&RQFHSWVLQ'HVLJQLQJDQ)06\VWHP Notes 10 /73RUWDEOH)07UDQVPLWWHU6SHFLÀFDWLRQV %ORFN'LDJUDP Quick Reference 19 6HWXS,QVWUXFWLRQV 2SHUDWLQJ,QVWUXFWLRQV 3URJUDPPLQJ,QVWUXFWLRQV Accessories 28 Notes...
Page 9 - Design Guide; Portable FM Design Guide Table of Contents; FM
3 Design Guide Portable FM Design Guide Table of Contents FM Technology Overview 5 System Overview 6 .H\&RQFHSWVLQ'HVLJQLQJDQ)06\VWHP Notes 10
Page 11 - Frequency Modulation (FM) Technology Overview; • Multipath; • Antenna Positioning
5 Design Guide Frequency Modulation (FM) Technology Overview )UHTXHQF\PRGXODWLRQ)0LVDPHDQVRIWUDQVPLWWLQJDXGLRXVLQJHOHFWURPDJQHWLFZDYHV This same technology is used by local FM radio stations to broadcast voice and music. FM signals can travel WKURXJKPRVWEDUULHUV²ZDOOVÁRRUVDQGFHLOLQJV7KHGLVWDQFHDVLJQ...
Page 12 - System Overview; Input Source
6 Design Guide System Overview 7KHUHDUHWKUHHPDLQSDUWVWRD3RUWDEOH)06\VWHP²,QSXWVRXUFHWUDQVPLWWHUDQGUHFHLYHU $PLFURSKRQHLVWKHPRVWFRPPRQLQSXWVRXUFHIRUWKH/7WUDQVPLWWHUDOWKRXJKWKH/7FDQWUDQVPLWWZRDXGLRLQSXWVDWRQFHRQRQHWUDQVPLVVLRQFKDQQHO:LWKWKHXVHRIWKH/$ERWKWKHLQSXWVZLOOEHPL[HG Thus, a person can use a li...
Page 13 - Receivers; Transmitter
Design Guide System Overview Listen offers two different portable receivers. Receivers /5 Portable Programmable 'LVSOD\)05HFHLYHU0+] /5 Portable Display FM 5HFHLYHU0+] 7KH/7PRGXODWHVWKHDXGLRRQDQ)0FDUULHUDQGWUDQVPLWVWKHVLJQDOYLDDQDQWHQ na on the unit. Transmitter /7 Portable Display FM 7UDQVPLWWHU0+]
Page 14 - Key concepts in designing a portable FM system; Channel Selection
8 Design Guide The range of a portable transmission will vary from one application to another. There are many different REVWUXFWLRQVWKDWFRXOGPLQLPL]HWKHUDQJH,QPRVWDSSOLFDWLRQVWKHUDQJHZLOOEHDSSUR[LPDWHO\DVVKRZQEHORZ3 3RZHU/HYHOUHIHUWRSDJHIRUSURJUDPPLQJSRZHUOHYHOVRIWKH/7 3²PHWHUVIW3²PHWHUVIW3²PHWHUVIW...
Page 15 - Eliminating Multipath; Transmitter power level; Multiple Portable Systems; Squelch
9 Design Guide Key concepts in designing a portable FM system As mentioned on page 5, multipath can occur with portable RF systems. The audio quality of the transmission can decrease with the occurrence of multipath. Here are a few potential improvements that FDQKHOSLIPXOWLSDWKWDNHVSODFH Eliminating...
Page 16 - Notes
Page 21 - SHFLÀFDWLRQV
15 LT-800 LT-700 LT-700 Package Contents /7 • Quick Reference Card • Warranty Card • FM Manual Card /LVWHQ&RQÀJXUDWLRQV /7 LT-700 User’s Manual Table of Contents 6SHFLÀFDWLRQV %ORFN'LDJUDP Quick Reference 19 6HWXS,QVWUXFWLRQV 2SHUDWLQJ,QVWUXFWLRQV 3URJUDPPLQJ,QVWUXFWLRQV Accessories 28 Notes 2...
Page 23 - $UFKLWHFWXUDO6SHFLÀFDWLRQ
LT-800 LT-700 /76SHFLÀFDWLRQV $UFKLWHFWXUDO6SHFLÀFDWLRQ 7KH/7SRUWDEOH)07UDQVPLWWHUVKDOOEHFDSDEOHRIEURDGFDVWLQJRQFKDQQHOV&KDQQHOWXQLQJVKDOOEHFDSDEOHRIEHLQJORFNHG7KHWUDQVPLWWHUVKDOOKDYHD615RIGERUJUHDWHU7KHRXWSXWSRZHUVKDOOEHDGMXVWDEOHWRTXDUWHUKDOIRUIXOO7KHGHYLFHVKDOOKDYHDQDXGLRIUHTXHQF\UHVSRQVHRI+]...
Page 25 - LT-700 Quick Reference; Articulating Flexible Antenna; RF Output
19 LT-800 LT-700 LT-700 Quick Reference Articulating Flexible Antenna 3RZHU%XWWRQ7XUQV SRZHU2Q2II PP,QSXW-DFN&RQQHFWD/LVWHQPLFURSKRQHKHUH /RRN /LVWHQ'LVSOD\6KRZV transmit level, channel, programming, battery status, and lock status. %DWWHU\&RPSDUWPHQW3ODFH $$EDWWHULHVLQFRPSDUWPHQW %HVXUHWRI...
Page 26 - LT-700 Setup Instructions; Unpack the Product; Select Battery Type
20 LT-800 LT-700 LT-700 Setup Instructions Unpack the Product 5HPRYHRXWHUSDFNDJLQJDQGSODVWLFFRYHU,QVSHFWIRUSK\VLFDOGDPDJH,IGDPDJHLVDSSDUHQWSOHDVH contact the dealer from which the product was purchased or Listen Technologies &RUSRUDWLRQWHFKQLFDOVXSSRUWIRUDVVLVWDQFHUHIHUWRSDJHIRUFRQWDFWLQIRUPDWLR...
Page 27 - Set Mic Sensitivity Switch; Part # Description Setting; Place Batteries in Unit
21 LT-800 LT-700 LT-700 Setup Instructions The microphone sensitivity switch is located inside the battery compartment, to the left of the %$77(5<VHOHFWLRQVZLWFK7KH/7LVVKLSSHGZLWKWKLVVZLWFKLQWKHFHQWHU0('SRVLWLRQ/LVWHQUHFRPPHQGVWKHIROORZLQJVHWWLQJVIRURXUPLFURSKRQHV,I\RXDUHXVLQJDPLFURSKRQHIURP anot...
Page 28 - Connect the Microphone
22 LT-800 LT-700 LT-700 Setup Instructions Connect the Microphone The microphone jack is located on top of the unit. Connect the Line Input Cable (Optional) 7KLVFDEOHDOORZV\RXWRFRQQHFWD79&'SOD\HURURWKHUHTXLSPHQWWRWKH/77RGRWKLV\RXPXVWRUGHUWKH/LVWHQ/$/LQH,QSXW&DEOHQRWLQFOXGHGZLWK\RXUXQLW7KLVFD...
Page 29 - LT-700 Operating Instructions; Turn Unit On; Antenna Positioning; Select the channel for transmitting
23 LT-800 LT-700 LT-700 Operating Instructions Turn Unit On Power On/Off Button When you press the power button, the unit turns on. The LED on top of the unit will be illuminated and the LCD display will be visible. Antenna Positioning NOTE: Be aware that the transmission range could decrease if the...
Page 30 - Using the MUTE / TALK switch; To lock on a channel; Press and hold the DOWN button for 5 seconds; Locking the Transmitter on One Channel
24 LT-800 LT-700 Using the MUTE / TALK switch Slide the switch to the mute position and the microphone audio is muted. When the PLFURSKRQHDXGLRLVPXWHGWKH/('RQWRSRIWKHXQLWÁDVKHVUDSLGO\6OLGHWKHVZLWFKEDFNWRWKHWDONSRVLWLRQDQGWKHPLFURSKRQHDXGLRZLOOUHWXUQWRWKHWUDQVPLVVLRQ,I\RXDUHXVLQJWKHOLQHOHYHOLQSXWLWZL...
Page 31 - LT-700 Programming Instructions; Program Mode Overview; Entering Program Mode
25 LT-800 LT-700 LT-700 Programming Instructions Program Mode Overview 7KH/7FDQEHSURJUDPPHGWRWUDQVPLWRQDOLPLWHGQXPEHURIFKDQQHOV)RUDSSOLFDWLRQVZKHUHXVHUVDUHUHTXLUHGWRVHOHFWDFKDQQHOVXFKDVFODVVURRPVRUODQJXDJHLQWHUSUHWDWLRQDSSOLFDWLRQDQG\RXGRQ·WZDQWWKHPWRKDYHWRVFUROOWKURXJKDOORIWKHDYDLODEOHFKDQQHOVWKLVI...
Page 33 - Reset to default settings; After the transmitter has been reset; Resetting to defaults
LT-800 LT-700 LT-700 Programming Instructions 7RUHVHWWKHWUDQVPLWWHUWRGHIDXOWVHWWLQJVIROORZWKHVHLQVWUXFWLRQV Reset to default settings After the transmitter has been reset, the display will return with defaults present. After the transmitter has been reset Press and hold the Up and Down channel butto...
Page 34 - Accessories for LT-700; Accessories; YHUWKH+HDG0LFURSKRQH
28 LT-800 LT-700 Accessories for LT-700 Accessories /$8QLW3RUWDEOH&KDUJLQJ&DUU\LQJ&DVH/$8QLW3RUWDEOH&DUU\LQJ&DVH /$8QLW3RUWDEOH&KDUJLQJ&DUU\LQJ&DVH/$8QLW3RUWDEOH&DUU\LQJ&DVH/$&RQÀJXUDEOH&DUU\LQJ&DVH/$8QLW3RUWDEOH&KDUJLQJ&DUU\LQJ&DVH/$8Q...
Page 41 - LR-400/500 User’s Manual Table of Contents
35 LR-400/500 LR-400/500 Package Contents /5 • Quick Reference Card • Warranty Card /LVWHQ&RQÀJXUDWLRQV /5/5 LR-400/500 User’s Manual Table of Contents 6SHFLÀFDWLRQV %ORFN'LDJUDP Quick Reference 40 6HWXS,QVWUXFWLRQV 2SHUDWLQJ,QVWUXFWLRQV 3URJUDPPLQJ,QVWUXFWLRQV/5RQO\ Accessories 52 Notes 53 /...
Page 46 - locked on current channel.
40 LT-800 LR-400/500 LR-400-863 Quick Reference 5),QSXW,QGLFDWRU,QGLFDWHVWKH5)UHFHLYH level. &KDQQHO'LVSOD\'LVSOD\VWKHFKDQQHOWKH/5LVFXUUHQWO\RQ /RFN,FRQ,QGLFDWHVWKHXQLWLV locked on current channel. %DWWHU\/HYHO,QGLFDWRU Articulating Flexible Antenna 6((.%XWWRQ$OORZVWKH user to change channels or...
Page 47 - locked on current channel
41 LR-400/500 LR-500-863 Quick Reference Articulating Flexible Antenna 6((.%XWWRQ$OORZVWKH user to change channels or lock on a channel. PP2XWSXW-DFN&RQQHFWDOLVWHQHDUSLHFHKHUH /RRN /LVWHQ'LVSOD\ Shows receive level, channel, programming, battery status, and lock status. %DWWHU\&RPSDUWPHQW3O...
Page 49 - Connect an Earphone or Headset
43 LR-400/500 LR-400/500 Setup Instructions Place two AA batteries in the compartment, making note of the battery polarity shown in the battery FRPSDUWPHQWDQGDJDLQYHULI\LQJWKDWWKH%$77(5<6(/(&7VZLWFKLVLQWKHFRUUHFWSRVLWLRQIRUWKHEDWWHULHV\RXDUHXVLQJ$ONDOLQHVKRXOGEHVHOHFWHGIRUDOOEDWWHU\W\SHVRWKHU...
Page 50 - Turn the Unit On
44 LT-800 LR-400/500 LR-400/500 Setup Instructions Receivers are turned on by rotating the volume dial counterclockwise. The red LED on top of the unit will LOOXPLQDWHDQGWKH/&'GLVSOD\VKRXOGLOOXPLQDWH,IWKH\GRQRWPDNHVXUH\RXKDYHLQVWDOOHGWKHEDWWHU ies correctly and that you are using fully charged b...
Page 51 - Volume knob; Antenna Placement; Antenna Position; Select a Channel; Select the channel using channel select buttons
45 LR-400/500 LR-400/500 Operating Instructions Turn Unit On WARNING: Excessive volume may result in hearing damage. Volume knob Rotate the volume knob counterclockwise with an earphone or headset connected to the unit. Antenna Placement NOTE: Be aware that the transmission range could decrease if t...
Page 52 - Adjust the volume control; Select the channel using SEEK
46 LT-800 LR-400/500 LR-400/500 Operating Instructions Adjust the volume control Use the control dial on the top of the unit to adjust the volume to a comfortable level. $QRWKHUZD\WRÀQGDFKDQQHORQWKH/5LVWRXVHWKH6((.EXWWRQ When you do this, the Listen receiver looks for the next active channel. 6RPHWL...
Page 53 - Press and hold the SEEK button for 5 seconds; Locking the Receiver on One Channel
LR-400/500 To lock on a channel NOTE: On the LR-400/500, when the channel is locked, a lock icon will appear underneath “Listen” on the display. Also if the unit is locked, the red LED on top of the receiver will ÁDVKZKHQWKH6((.EXWWRQLVSUHVVHG. Press and hold the SEEK button for 5 seconds 3UHVVDQGKR...
Page 54 - Squelch Programming; Entering Squelch Program Mode; Adjusting the Squelch level
48 LT-800 LR-400/500 LR-400/500 Operating Instructions Squelch Programming Entering Squelch Program Mode Turn unit off 3UHVVDQGKROGWKH6((.EXWWRQZKLOHKROGLQJ6((.EXWWRQGRZQWXUQWKH212))92/80(GLDOWRWXUQ the unit on. 5HOHDVHWKH6((.EXWWRQZKHQWKH/LVWHQQDPHGLVDSSHDUVDSSUR[LPDWHO\VHFRQGVDQGDWZRGLJLW display ...
Page 55 - Set the squelch setting to the highest level; If the receiver is close to the transmitter, set the squelch high; If in an area that has a lot of interference, set the squelch high; For maximum amount of range, set the squelch to a low level
49 LR-400/500 Squelch The purpose of squelch is to mute the audio output of your receiver when the signal from the transmitter is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone. The squelch on your receiver can be adjusted so that it will mute t...
Page 56 - Local mode; After the receiver has been reset; To change to DX/Local mode
50 LT-800 LR-400/500 DX/Local ';LVWKHQRUPDORSHUDWLRQDOPRGH/RFDOPRGHFDQHIIHFWLYHO\OLPLWDQ\LQWHUPRGXODWLRQDQGRU interference in a busy RF environment. This is done by limiting the amount of RF gain in the receiver. When local mode is selected, the range of the receiver is compromised. Depending on you...
Page 57 - Programming Instructions; To enter program mode
51 LR-400/500 LR-500 Programming Instructions (LR-500 only) Programming Instructions 7KH/5FDQEHSURJUDPPHGWRUHFHLYHRQDOLPLWHGQXPEHURIFKDQQHOV:KHQDQDSSOLFDWLRQUHTXLUHVWKHXVHRIPRUHWKDQRQHFKDQQHOLHDFODVVURRPRUODQJXDJHLQWHUSUHWDWLRQWKHUHFHLYHUFDQEHSURJUDPPHGWRYLHZRQO\WKHQHFHVVDU\FKDQQHOV Entering Program...
Page 58 - RWLÀFDWLRQ6LJQDJH.LW
52 LT-800 LR-400/500 Accessories for LR-400/500 Accessories /$ Stereo Headphones /$ Neck Loop /$ Ear Speaker /$ %HKLQGWKH+HDG Stereo Headphones /$8QLW3RUWDEOH&KDUJLQJ&DUU\LQJ&DVH/$8QLW3RUWDEOH&DUU\LQJ&DVH/$8QLW3RUWDEOH&KDUJLQJ&DUU\LQJ&DVH/$8QLW3RUWDEOH&DUU\LQJ&...
Page 65 - Supplementary; Supplementary Information Table of Contents
59 Supplementary Supplementary Information Table of Contents Frequency Chart 61 %DWWHU\&KDUJLQJ,QIRUPDWLRQ Troubleshooting 63 Frequently Asked Questions 65 &RPSOLDQFH:DUUDQW\DQG&RQWDFW,QIRUPDWLRQ Notes 68
Page 67 - Frequency Chart; Frequencies
Page 68 - Battery Charging Information; Charging with a drop-in charger
62 LT-800 Supplementary Battery Charging Information Charging with a drop-in charger 7RFKDUJHWKHEDWWHULHVXVLQJDGURSLQFKDUJHUVLPSO\SODFHWKHXQLWLQWRDVORWLQWKHFKDUJHUDQGFRQQHFW the charger to power. Make sure the unit is fully seated in its slot. IMPORTANT: DO NOT ATTEMPT TO CHARGE ANY TYPE OF BATTERY ...
Page 69 - Troubleshooting
63 Supplementary Troubleshooting Troubleshooting The unit has no power. 0DNHVXUHWKHXQLWKDVIXOO\FKDUJHGEDWWHULHV3UHVVWKH32:(5EXWWRQ,IWKLVGRHVQRWZRUNWU\D different set of batteries. Make sure the batteries are installed correctly. There is no audio. 0DNHVXUHWKH087(7$/.VZLWFKLVLQWKH7$/.SRVLWLRQ0DNHVXUH...
Page 71 - Frequently Asked Questions
65 Supplementary Frequently Asked Questions Frequently Asked Questions Q 'R,QHHGDWUDQVPLWWHUIRUHDFKDXGLRVRXUFH" A Yes. To transmit two different frequencies, there must be two separate transmitters. Q :KDWLVWKHUDQJHRIWKH/77UDQVPLWWHU" A 7KHUDQJHRIWKH/7ZLOOGHSHQGXSRQWKHSRZHUVHWWLQJDQGLQWHUIHU...
Page 73 - Compliance, Warranty and Contact Information; Contacting Listen; Compliance Information; Warranty
Supplementary Compliance, Warranty and Contact Information Contacting Listen ,IWHFKQLFDOVHUYLFHLVQHHGHGSOHDVHFRQWDFW/LVWHQ3UHDXWKRUL]DWLRQLVUHTXLUHGEHIRUHUHWXUQLQJ/LVWHQSURGXFWV,ISURGXFWVZHUH damaged in shipment, please contact the carrier, then contact Listen for replacement or repair requirements ...
Page 76 - Printed in the United States of America
Printed in the United States of America /LVWHQ7HFKQRORJLHV&RUSRUDWLRQ ® $OO5LJKWV5HVHUYHG Listen Technologies Corporation 14912 Heritagecrest Way %OXIIGDOH8WDK86$ +1.801.233.8992 +1.800.330.0891 North America +1.801.233.8995 Fax www.listentech.com [email protected] Listen Technologies GmbH Ja...
