Listen Technologies 863.2 User's Manual
Contents
1. 29 Notes 30 Portable FM 863 MHz 863 050 863 200 863 400 863 5 LR 400 Portable Display FM Receiver LR 500 Portable Programmable Display FM Receiver Don t miss a single sound FREQUENCY MODULATION TECHNOLOGY LR 400 500 Users Manual Table of Contents Specifications 37 Block Diagram 37 Quick Reference 40 Setup Instructions 42 Operating Instructions 45 Programming Instructions LR 500 only 5 Accessones 52 Notes 53 LR 400 500 Package Contents e LR 400 500 e Quick Reference Card e Warranty Card i deg pa B T RY ne LR 500 863 Portable Programmable Display FM Receiver 863 MHz LR 400 863 Portable Display FM Receiver 863 MHz Listen Configurations e LR 400 863 e LR 500 863 35 LR 400 863 Specifications Architectural Specification The LR 400 863 FM receiver shall be capable of receiving on 17 wide band channels with a SNR of 70 dB or greater The device shall be able to be locked on a single channel The receiver shall be capble of seeking channels The device shall have an adjusta ble squelc h The device shall have an audio frequency response of 50 Hz to 15 KHz 3 dB The device will incorporate a stereo headset jack that allows the userto plug in eithera mono or stereo headset The device shall incorporate an LCD display that indicates channel battery level low battery battery charging and RF signal strength The receiver shall be able to function i2. 0 5 lt Frequentiy Asked Questions Frequentiy Asked Questions Can the receiver be locked on a channel if needed A Yes All Listen receiverscan be locked ona single channel What is the battery life of a receiver A 20 hours using alkaline batteries 10 hours using NiMH batterie s 2 Y o O o a 66 Compliance Wananty and Contact Information Compliance Information The following compliance information applies to the LT 800 863 LT 700 863 LR 500 863 and LR 400 863 These devices comply with ETSI EN 301 357 These devicesare CEcompliant These devices are RoHS compliant C MHOHS Listen Technologies Corporation Listen warrants its transmitters and receivers models LT 700 LT 800 LR 42 LR 44 LR 100 LR 300 LR 400 LR 500 and LR 600 to be free from defects in workmanship and material under normal use and conditionsforthe useful lifetime of the product from date of purchase Listen warrants it s Stationary IR Radiators LA 140 to be free from defects in workmanship and material under nor mal use and conditions forthree years from the date of purchase Listen warrants its Noise Canceling Microphone LA 270 to be free from defects in workmanship and material under normal use and conditions for one yearfrom date of purchase All otherproductsand accessonesare waranted for 90 days from date of purchase This warranty is only available to the original end purchaserof the product a
3. Meu w jddns me Listen Portable FM 883 MHz a Design Guide www dlistentech com 863 050 863 200 863 400 863 5 iss a single sound Portable FM Design Guide Table of Contents Y FM Technology Overview 5 System Overview 6 Key Concepts in Designing an FM System 8 S 10 D Notes Frequency Modulation FM Technology Overview Frequency modulation FM is a means of transmitting audio using electromagnetic waves This same technology is used by local FM radio stations to broadcast voice and music FM signalscan travel through most barriers walls floors and ceilings The distance a signal travels has many different variables such as Radio Frequency RF output power the type and placement of the antenna and the broadcasted frequency This section of the manual will help you design a system that will get the best range with the least amount of interference eg A G E o 0 Microphone g mes Teer ys pome Receiver FM Transmitter When designing an FM system it is important to keep the following in mind e Multipath Multipath interference isa form of PF interference that occurs when radio signals have more than one path between the receiver and the transmitter causing the two RF signalsto add out of phase This could occur in areas with RF reflective surfaces such as furniture walls or floors The result of multipath is the receiver audio coming in and o
4. Once in the program mode a function menu is displayed Function 1 F1 is displayed as default Pressing the channel up or down buttons will scroll through the functions F1 Pressing the seek button will enter that particular function Fl Channel Lock out No channels are locked out as default Pressing the up and down buttons will scroll through channels Pressing the seek button will toggle between available and locked out forthat channel When a chan nel is locked out the L O on the LCD shall be displayed NOTE Although it is possible to display an F2 function while in program mode there is no F2 function at this time Listen may add another programming function in the future but there is only one programming function F1 on the 863 MHz receivers When no button is pressed for 10 seconds the program menu is exited altogether regardless of whether a function is entered or not To exit out of the program menu or function manually EN When in the programming menu Press and hold power for 2 seconds This exits the program mode When in a programming function Press and hold power for 2 seconds This exits the function and goes back to the programming menu Ele Pressing and holding powerfora full 4 seconds will exit both programming function and programming menu 51 Accessones for LR 400 500 Accessones 52 LA 166 LA 164 LA 165 NS loo Ear Speaker Stereo Headphones LA 170 LA 361 B
5. selection switch is in the alkaline position Pi N CHANNEL I 4 Fall SELECT lt Q Battery select switch 20 LT 700 Setup Instructions E Set Mic Sensitivity Switch The microphone sensitivity switch islocated inside the battery compartment to the left of the BATTERY selection switch The LT 700 is shipped with this switch in the center MED position Listen recommends the following settings for our microphones If you are using a microphone from another vendor you may need to experiment with different settings Part Description Setting LA 261 Lavalier Microphone LA 262 Over the Head Microphone LA 272 Over the Head Microphone w Earphone LA 274 Hand Held Microphone LA 276 Collar Microphone LA 277 Behind the Head Microphone LA 278 Conference Microphone 5 Place Batteries in Unit Place two AA batteries in the compartment making note of the battery pola rty shown in the battery compartment and again verifying that the BATTERY SELECT switch is in the correct position for the batteries you are using Alkaline should be selected for all battery types other than NiMH ANNEL A SELECT MO re NNEL me CHSgLECT PWR E pa LI 700 Setup Instructions 6 Connect the Microphone The microphone jackislocated on top ofthe unit Connect the Line Input Cable Optional This cable allows you to connect a TV CD player or other equipment to the LT 700 To do this you must ord
6. A Volume knob Rotate the volume knob counterclockwise with an earphone or headset connected to the unit WARNING Excessive volume may result in hearing damage 2 Antenna Placement 2A Antenna Position Raise the antenna to the upright position When the antenna if fully extended it will click into position NOTE Be aware that the transmission range could decrease if the antenna is not in an upright position E Select a Channel 3A Select the channel using channel select buttons Select the channel to match the transmission channel by pressing the UP and DOWN buttons on the receiver an un EJ Listen I 862 35 i 45 LR 400 500 Operating Instructions EN Select the channel using SEEK Another way to find a channel on the LR 400 500 is to use the SEEK button When you do this the Listen receiver looks for the next active channel Sometimes the unit will mistake interference for a real broadcast signal If you get interference press the SEEK button again The unit may stop on a channel that is close to the actual broadcast channel in which case the channel will sound noisy or distorted Simply press SEEK again until you find the clearest operating channel 4 Adjust the volume control Use the control dial on the top of the unit to adjust the volume to a comfortable level 46 LR 400 500 Operating Instructions Locking the Receiver on One Channel The unit can be electronically locked on one chan
7. CHILI Battery Level Indicator Program gone Indicates while in programming Dos mode the ale channel has Function is been locked out pgs lock Icon Indicates the unit is locked on current channel 41 LR 400 500 Setup Instructions 1 Remove the product Remove outer packaging and plastic cover Inspect for physical damage If damage is apparent please contactthe dealerfrom which the product was purchased or Listen Technologies Corpora tion technical support for assistance refer to page 67 for contact information 2 Open the front access door If locked use a pocketknife or small screwdriver to unlock the door locks on both sides of the unit To unlock the door rotate the lock Y tum counterclockwise Grip the two tabs with your thumb and index finger and pull the door downward DO NOT place batteries in the unit at this time E Select Battery Type Two types of batteries may be used The unit is shipped with the switch in the Alkaline position Use a pen orsmall screwdriverto select the battery type u B ATI E RY pune NiMH amp Battery select switch WARNING Do not place the BATTERY switch in the NiMH position if you are not using Nickel Metal Hydnde Battenes The NiMH position will attemptto charge any batteries in the unit even if they are not the proper type Charging non Nic kel Metal Hydride NiMH battenes will result in physical ham destruction of property and or fire CAUTION
8. If you are using any battery type other than rechargeable Nickel Metal Hydnde NiMH battenes make sure the BATTERY selection switch is in the alkaline position 42 LR 400 500 Setup Instructions 4 Place Batteries in Unit Place two AA batteries in the compartment making note of the battery polarity shown in the battery compartment and again verifying that the BATTERY SELECT switch is in the correct position for the batteries you are using Alkaline should be selected for all battery types other than NiMH NOTE Listen provides industrial strength AA alkaline batteries part number LA 361 and high performance AA Nickel Metal Hydride batteries part number LA 362 These may be purc hased from your Listen dealer DI O nf i isten Hi LI Arche Y kaune 5 Connect an Earphone or Headset Your headset or earphone will connect to the jack on the top of the unit Either mono or stereo connectors may be used with a Listen receiver Make certain you push the plug all the way into the jack 43 LR 400 500 Setup Instructions 6 Turn the Unit On Receivers are tumed on by rotating the volume dial counterclockwise The red LED on top of the unit will illuminate and the LCD display should illuminate If they do not make sure you have installed the batter les correctly and that you are using fully charged battenes ABIE NEVER RE LR 400 500 Operating Instructions 1 Turn Unit On T
9. J lt 61 gt y o o o a 62 Battery Charging Information The LT 700 and LR 400 500 receivers are unique because they have SmartCharge chargers built in When any of these units are placed into a Listen charging case NiMH battenes will be charged SmartCharge uses a pulse charging which greatly extends the life of Nickel Metal Hydride NiMH batteries The entire charging process takes about 13 hours Listen recommendsthat you allow the chargerto complete its full cycle every time for ma ximum battery life During the charge cycle the red LED on top of the Listen product will flash slowly When charging is completed the LED will turn off It is not necessary to unplug the charger however if you unplug the unit from the charger and then plug it back in it will begin the 13 hour charge cycle overagain When not using the receiver it is recommended to leave the unit on the charger The charger provides a maintenance charge that keeps the battery at 100 If the unit is not on the charger the battery will lose up to 20 of its charge per month NOTE Listen provides 2300 mAH milli Amp hour constant current NiMH Nickel Metal Hydride batteries These may be purchased from Listen part number LA 362 Charging with a drop in charger To charge the batteries using a drop in charger simply place the unit into a slot in the charger and connect the chargerto power Make sure the unit is fully seated
10. Portable FM 863 MHz l 863 0501 863 200 863 400 863 9 Portable FM System Design Guide and Manual Don t miss a single sound FREQUENCY MODULATION TECHNOLOGY DearValued 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 satisfied That s why we independently certify them to the highest quality standardsand back them with a limited lifetime guarantee We stand ready to answer any questions you might have during installation orin the operation of our products Should you experience any problems whatsoever with your Listen products we are ready to help youin anyway we can with prompt efficient customer care Because at Listen it s all about you And should you have any comments on how we might improve our products or our service we re here to listen Here s how to reach Us 1 801 233 8992 1 800 330 0891 North America 1 801 233 8995 Fax support listentech com www listentech com Listen Technologies GmbH J asminstr 16 905 22 Oberasbach Germany 49 911 955159 0 Tel 49 911 955159 40 Fax www listentech de info listentech de Thank you and enjoy your listening experience Best regards Russell Gentner and the Listen Team Lifetime Warranty the best in the business Listen s full time technical support is passionate a
11. ansmission will vary from one application to another There are many different obstructions that could minimize the range In most applications the range will be approximately as shown below P Power Level refer fo page 26 for programming power levels of the LT 700 P1 30 meters 100 ft P2 46 meters 150 ft P3 61 meters 200 ft Range vanesdepending on environment Maximizing Range Here are some tips to maximize the transmission range e Eliminate or minimize obstructions between the transmitter and receivers e Minimize the distance between the transmitter and receivers e Move transmitter and receivers away from metal objects Onent both transmitting and receiving antennas vertically Key concepts in designing a portable FM system Eliminating Multipath Asmentioned on page 5 multipath can occurwith portable RF systems The audio quality of the transmission can decrease with the occurence of multipath Here are a few potential improvements that can help if multipath takes place Squelch Squelching the receiver will mute the audio output when the signal from the transmitter istumed off or the signal istoo weak to be received Without squelch you would hear radio noise in yourearphone with no RF signal present Tightening the squelch will tum the receiver off if it ischattering because of multipath refer to page 48 for programming squelch Keep in mind tightening squelch will limit the range between tran
12. bout what they do and you can depend on them to solve any equipment issues with confidence In the few instances where repairs were needed 99 of all clients indicated that they were happy with repair turn around times and 85 of the time clients were without their product for less than 10 days Overall client satisfaction of working with Listen wasrated 4 8 out of 5 The Word Around Listen Please continue with your excellent attitude toward customer satisfaction You guys are great I ve never had such good service from any company Keep up the good work You stand behind your product wondertully Assistive Listening Language Interpretation Soundfield Tour Group Conferencing Portable FM Table of Contents Design Guide 4 Y 3 FM Technology Overview O 0 System Overview Key Concepts in Designing an FM System Notes LT 700 863 Portable FM Transmitter Specifications 17 Block Diagram 18 Quick Reference 19 Setup Instructions 20 Operating Instructions 23 Programming Instructions 25 Accessories 28 Notes 29 LR 400 500 863 FM Receivers Specifications Block Diagram Quick Reference Setup Instructions Operating Instructions Programming Instructions LR 500 only Accessones Notes Supplementary Information Frequency Chart 61 Battery Charging Information 62 Troubleshooting 63 Frequently Asked Questions 65 Compliance Warranty and Contact Information 6 Notes 68
13. cal mode Only strong channels will be automatically tuned in ET To change to DX Local mode 1A While the unit is OFF pressand hold the channel down button and tum the unit on 1B The LCD shall indicate the current setting D or L Pressing the down button will toggle between Local and DX Mode D or L 1D Pressing seek will enterthe setting and retum to nomal operational mode DX Local Resetting to defaults To reset the receiver to default settings follow these instructions ER Reset to default settings 1A Press and hold the Up and Down channel buttons while turning the unit on Press and hold the Up and Down channel buttons while tuming the unit on This will light up allsegments of the display 1B After the receiver has been reset After the receiver has been reset the display will retum with defaults present NOTE The defaults are ee T e Channel 01 Pe wis Channel lockout All channels active in LI I LR 500 Programming Instructions LR 500 only Programming Instructions The LR 500 can be programmed to receive on a limited number of channels When an application requires the use of more than one channel i e a classroom or language interpretation the receiver can be programmed to view only the necessary channels Entering Program Mode EI To enter program mode 1A While the unit isO N pressand hold the channel down and up buttons simulta neo usly for 3 seconds 2 To program
14. e an audio frequency response of 50 Hz to 15 kHz 3 dB The device shall incorporate a microphone sensitivity switch The device shall incorporate a mute switch The unit shall utilize two 2 AA batteries The battery door shall be capable of being mechanically locked The device shall incorporate an LCD display that indicates battery level channel channel lock low battery battery charging programming and RF signal strength The porta ble tra nsmitter shall incorporate automatic battery charging circuitry for recharging of NIMH batteries The Listen LT 700 863 is specified Specifications LT 700 863 005 stability 32 to 122 0 to 50 C Response System Signal to Noise 70 dB A Weighted AAA in O lt 2 total harmonic distortion THD at 80 deviation E Unbalanced tip of 3 5mm connector 20 dBu nominal 30 dBu Microphone Input E maximum impedance 21 ohms Microphone Sensitivity Three position switch high middle and low 6 dB increments eek Unbalanced ring of 3 5mm connector 10 dBu nominal input P level 3 dBu maximum impedance 10K ohms Microphone Power 3 VDC Bias Power mute channel UP DOWN Conto Set up Controls battery Mic sensitivity NiMH alkaline battery SQ enable disable compartment idic low or to indicate charging Flashes when muted battery life RF Power Listen batteries 362 NiMH only Physical Doon Manually Lockable Up down and power buttons through door Other controls behind doo
15. e transmitters What is the range of the LT 700 Transmitter A The range of the LT 700 will depend upon the power setting and interference refer to page 8 Generally the range is up to 61 m 200 ft Is there a limit to the number of transmitters can use in one room A Yes Listen recommends that no more that 8 channels are in used simultaneously refer to page 9 on using multiple channels in the same room What reciever should be used with multiple trasmitters A We recommend the LR 500 for use with multiple transmitters because the LR 500 is programmable and can lock out unused channels O How many channels can program into the LR 500 A l to 17 The receiver has 17 channels and you can program it to have just the channels you want to have access to lt can be a two channel receiver a 12 channel receiver or keep all 17 O How many receivers can have in a system A As many as you need the number is endless O What are the major differences between the LR 400 and the LR 500 A Both receivers can tune to 17 broadband channels However the LR 400 has the buttons under the battery compartment door and the LR 400 is not programmable to lock out channels If you plan to use one receiver with multiple transmitters you should use the LR 500 which is progra mmable to just those channels you need O What is the battery life of the LT 700 Transmitter A Fifteen hours alkaline Eight hours NiMH 2 y i D 3
16. ehind the Head Assistive Listening High Capacity AA Alkaline Stereo Headphones Notification Signage Kit Batteries 2 LA 311 LA 313 LA 317 LA 318 LA 320 LA 321 LA 322 LA 323 LA 324 LA 325 Rechargeable AA NiMH Batteries 2 16 Unit Portable Charging Carrying Case 16 Unit Portable Carrying Case 4 Unit Portable Charging Carrying Case 4 Unit Portable Carrying Case Configurable Carrying Case 8 Unit Portable Charging Carrying Case 8 Unit Portable Carrying Case 4 Unit Portable Charging Carrying Case w Removable Lid 8 Unit Portable Charging Carrying Case w Removable Lid 16 Unit Portable Charging Carrying Case w Removable Lid Notes 53 Notes 54 D gt Listen Portable FM 863 MHz www listentech com 863 050 863 200 863 400 863 5 Supplementary Information iss a single sound perle re lea LE EMIL BEA BE FREQUENCY MODULATION TECHNOLOGY ll Supplementary Information Table of Contents Frequency Chart 61 Battery Charging Information 62 Troubleshooting 63 Frequently Asked Questions 65 Compliance Warranty and Contact Information 6 Notes 68 Lo o D 3 oO 5 lt Te T TT Tt Fs o 59 Frequency Chart Frequencies Channel 01 863 050 02 863 200 03 863 400 04 863 550 05 863 750 06 863 900 07 864 100 08 864 250 09 864 450 10 864 600 11 864 800 12 864 950 13 863 300 14 863 650 15 864 000 16 864 350 17 864 700 3 pei 2 3 0
17. er 863 MHz Receivers Listen offers two different portable receivers LR 400 863 i LR 500 863 2 ii SEDE sima a Al Display FM Receiver 863 MHz eg MD G E o 0 Key concepts in designing a portable FM system Channel Selection Q 2 gt Q o G A Use this section of the guide to choose the channel settings forthe transmitter and receivers e The goal is to find a transmission channel s that is free from interference Interference originates from other transmitters and from other equipment such as a computer e Listen products offer 17 different channels to choose from This increases the chance you ll find an interference free channel e The best way to check for interference is to use the SEEK button on the receiver Be sure all Listen transmitters have been turned off if there is interference the receiver will find these channels If the receiver finds a frequency in use do not use this channel e In general most of the channels will be free from interference e Interference can be overcome by maximizing the transmission power and by using the receivers close to the transmitting antenna e If more than one channel is in use space the channels further from each other Use the Listen frequency chart on page 61 to determine the appropnate channels EXAMPLE 2 channel system use channels 01 amp 11 3 channel system use channels 01 06 amp 11 Range The range of a portable tr
18. er the Listen LA 263 Line Input Cable not included with your unit This cable allows you to connect both a microphone and line input to the jack on top of the LT 700 See the diagram below for connection information You can use the microphone and the line input at the same time NOTE The MUTE switch mutes only the microphone the line source will continue transmitting when the switc h is in the MUTE position 22 LI 700 Operating Instructions 1 Turn Unit On 1A Power On Off Button When you pressthe power button the unit tumson The LED on top of the unit will be illuminated and the LCD display will be visible FJ Antenna Positioning Raise the antenna to the upright position When the antenna if fully upright it will click into position NOTE Be aware thatthe transmission as could decrease if the antenna is notin an upright position i x E Select the channel for transmitting 863 MHz operates on 17 wide band channels Channels are displayed numerically i e 01 17 refer to Channel Selection in design guide page 8 for guidelines on choosing an interference free channel Litor 23 LI 700 Operating Instructions Using the MUTE TALK switch Slide the switch to the mute position and the microphone audio ismuted When the microphone audio is muted the LED on top of the unit flashes rapidly Slide the switch back to the talk position and the microphone audio will return to the transmission If you are using
19. ermine the channels frequency and space the number of channels further from each other DX Local The receiver can be adjusted to receive only the strongest signals refer to page 50 for DX Local information A DX signal will be less sensitive because distance is the ultimate goal For applications where you want to minimize the distance local mode will only search for strong signals Local mode is much more sensitive than DX MD G E o 0 Notes opino ubisag 10 Design Guide Notes 11 Portable FM 863 MHz 863 0501 863 200 863 400 863 5 O LT 700 863 Portable Display Transmitter Don t miss a single sound FREQUENCY MODULATION TECHNOLOGY LT 700 Users Manual Table of Contents Specifications 17 Block Diagram 18 Quick Reference 19 Setup Instructions 20 Operating Instructions 23 Programming Instructions 25 Accessories 28 Notes 29 LF700 Package Contents e LT 700 863 e Quick Reference Card e Warranty Card e FM ManualCard Marche pene er SATER LT 700 863 Portable Displa y FM Transmitter 863 MHz Listen Configurations e LT 00 863 LT 700 863 Specifications Architectural Specification The LT 700 863 portable FM Transmitter shall be capable of broadcasting on 17 channels Channel tuning shall be capable of being locked The transmitter shall have a SNR of 70 db or greater The output power shall be adjustable to quarter half or full The device shall hav
20. hannel battery status and lock status Power Charging Port e SEEK Button Allows the POROTE N userto change channels ES seex orlock on a channel Front Door Locke dos o dre zu hy Battery Select Switch Choose the type of battenes being used Channel select Buttons e e Battery Compartment Place 2 AA batteries in compartment Be sure to follow polarity pattem Channel Display Displays the channel the LR 400 is currently on e RF Input Indicator e een um T Indicates the RF receive Listen E level o II O Battery Level Indicator lock Icon Indicates the unit is locked on current channel 40 LR 500 863 Quick Reference 3 5 mm Output Jack Connect a listen earpiece here LED When lit indicates unit has power e On Off and Volume Control Dial Articulating Flexible Antennae Look amp Listen Display Shows receive level channel programming battery status and lock status SEEK Button Allows the userto change channels orlockona channel Power Charging Port Front Door Locke Battery Select Switch Choose the type of battenes being used Ch I Select Butt annel select BUTTONS e e Battery Compartment Place 2 AA batteries in compartment Be sure to follow polarity pattem Channel Display Displays the channel the LR 500 is currently on RF Input Indicator Indicates the RF receive Listen m vel FER Pom GL LJO
21. he audio is distorted Make sure you are using an approved Listen microphone Try using a different mic sensitivity switch setting the switch is located inside the battery compartment of the unit If you are using a line level input try tuming down the level of the input Make sure the receiver is ON and receiving the appropnate channel There is hum in the audio The microphone may be too close to a transformer Try moving away from the transformerand see if the hum goesaway The microphone level is low The mic sensitivity switch may be on the wrong setting see page 21 Try a different setting the switch is located inside the battery compartment Some microphones have directional pickups ensure that the microphone in use is oriented and positioned properly pointing at the soeakers mouth The microphone must be in close proximity to the person who is speaking If this does not work try using a head worn microphone There is too much noise This is most likely because the microphone is not close enough to the talker s mouth and it is picking up background noise Try positioning the microphone closerortry using a microphone that is directional such as a head worn mic Try another setting on the mic sensitivity switch located inside the battery compartment There is interference Try different frequencies to find a clear channel Use a receiver to sweep the area without any transmitters on The receiverwill stop o
22. in its slot IMPORTANT DO NOTATIEMPT TO CHARGE ANY TYPE OF BATTERY OTHER THAN NiMH NIC KEL METAL HYDRIDE with your Listen equipment Alkaline battenes may explode when connected to a charger Other nsks of charging non NiMH batteries include destruction of property or fire IMPORTANT In order to charge NiMH batteries the BATTERY SELECT switch in your Listen product must be set to the NiMH setting Use a pen or small screwdriverto move the switch located in the battery compartment to the proper position WARNING The case lid MUST be open or removed while the units are charging The charging process generates heat Air ventilation is required It is best to store your charging case at room temperature away from heat sources and direct sunlight Troubleshooting Troubleshooting The unit has no power Make sure the unit has fully charged batteries Press the POWER button If this does not work try a different set of battenes Make sure the battenes are installed correctly There is no audio Make sure the MUTE TALK switch is in the TALK position Make sure you have the microphone plugged all the way into the input jack Make sure you are using a Listen approved microphone see list on page 21 If you are using the line input make sure you have connected a line level Unbalanced input at the ring of the connector Also be sure the receiverison volume istumed up and headphones are placed firmly in the jack T
23. ion The LR 500 863 FM receiver shall be capable of receiving on 17 wide band channels with a SNR of 70 dB or greater The receiver shall be programmable to electronically lock out unneeded channels The receiver shallbe capable of seeking channels The device shall be able to be locked on a single channel The device shall have an adjustable squelch The device shall have an audio frequency response of 50 Hz to 15 KHz 3 dB The device will incorporate a stereo headset jack that allows the userto plug in eithera mono orstereo headset The device shall incorporate an LCD display that ind ic ates channel battery level low battery battery charging and RF signal strength The receiver shall be able to function in both DX and Local mode The unit shall operate off of 2 AA batteries The receiver shall incorporate automatic battery charging circuitry for recharging of NIMH battenes The Listen LR 500 863 is specified Specification LR 500 863 005 stability 32 to 122 0 to 50 C Sausich Programmable in 20 steps automatic on loss of RF signal CE ETSI RoHS System Frequency 50 Hz 15 kHz 3 dB Response System Signal to Noise 70 dB A Weighted Ratio lt 2 total harmonic distortion THD at 80 deviation 3 5 mm connector unbalanced OdBu nominal output level 16 mW Output maximum impedance 32 Ohms Channel up down SEEK volume Control Set up Controls battery Alkaline NiMH battery switch compartment Channel Lock O
24. is found press SEEK to exit the squelch programming mode NOTE Keep in mind low squelch may allow multipath and squelch chattering at long distances Squelch setting 00 is no squelch this setting disables the squelching capabilities of the receiver Squelch setting 20 is maximum squelch sensitivity when on this setting there must be a very strong and stable RF signal forthe unit to not engage the squelch feature NOTE For squelch settings 1 3 the squelch function is slow which allows for maximum transmission range For squelch settings 4 20 the squelch function is fast to ensure little radio noise is heard dunng the squelch function LR 400 500 Operating Instructions Squelch The purpose of squelch isto mute the audio output of your receiver when the signal from the transmitter is tumed off oristoo weak to be received Without squelch you would hear radio noise in yourearphone The squelch on your receivercan be adjusted so that it will mute the audio on different RF signal strengths This is useful as follows Squelch Setting If the receiver is close to the transmitter set the squelch high a default If the receiver is going to be close to the transmitter i e in a classroom set the squelch setting high so that when the transmitter is tumed off it immediately squelches and ignores transmitters in other rooms Set the squelch setting to the highest level To ensure that users don t hear transmissions from other tra
25. mming mode the specific process channel hasbeen locked out Lock Icon Indicates the unit is locked on current channel LT 700 Setup Instructions EN Unpack the Product Remove outer packaging and plastic cover Inspect for physical damage If damage is apparent please contactthe dealerfrom which the product was purchased or Listen Technologies Corporation technical support for assistance refer to page 67 for contact information 2 Open the front access door locked use a pocketknife or small screwdriver to unlock the door locks on both sides of the unit o unlock the door rotate the lock Y tum counterclockwise Grip the two tabs with your thumb and index nger and pull the door downward DO NOT place batteries in the unit at this time N NNEL 408 n CHAZIECT EJ Select Battery Type Two types of batteries may be used NiMH or Alkaline The unit is shipped with the switch in the Alkaline position Use a pen or small screwdniver to select the battery type WARNING Do not place the BATTERY switch in the NiMH position if you are not using Nickel Metal Hydride Battenes The NiMH position will attemptto charge any battenes in the unit even if they are not the proper type Charging non Nic kel Metal Hydride NiMH battenes will result in physical harm destruction of property and or fire CAUTION If you are using any battery type other than rechargeable Nickel Metal Hydnde NiMH battenes make sure the BATIERY
26. n any channelsthat are being broadcasted in the area Avoid the channels that the receiver detects having a signal cannot pick up the signal on the receiver Make sure the transmitter and the receiver are on the same frequency channel It s confusing for users to have 17 available channels Use the PROGRAM function LT 700 and LR 500 only to lock out Unwanted channels Users will only be able to scroll through available channels I cannot change the channel The transmitter or receiver may be locked on a channel check for the padlock icon To unlock press and hold the UP or DOWN button for 5 seconds 3 pl D 3 D J lt Troubleshooting Troubleshooting My batteries are not charging Make sure you are using NiMH batteries and that the BATTERY SELECT switch inside the battery compartment is set to the NiMH position Make sure the batteries are installed correctly Make sure you are using a Listen charging case Make sure the charging case isconnected to powerand the unit is securely pushed into its slot in the case NOTE Listen uses 2300 mAh milli Amp hour constant current NiMH Nickel Metal Hydride battenes These may be purchased from a Listen dealer ask for part number LA 362 gt o O o a 64 Frequently Asked Questions Frequently Asked Questions Do need a transmitter for each audio source A Yes To transmit two different frequencies there must be two separat
27. n both DX and Local mode The unit shall operate off of 2 AA battenes The receiver shall incorporate automatic battery charging circuitry for recharging of NIMH batteries The Listen LR 400 863 is specified Specifications LR 400 863 RF 005 stability 32 to 122 0 to 50 C System Frequency Response 50 Hz 15 kHz 3 dB System Signal to Noise Ratio 70 dB A Weighted lt 2 total harmonic distortion THD at 80 deviation Ben 3 5 mm connector unbalanced OdBu nominal output level 16 P mW maximum impedance 32 Ohms Channel up down SEEK volume Controls Set up Controls battery compartment Alkaline NiMH battery switch Channel Lock DX Local squelch LED Red illuminated when unit is on Flashes when batteries are ala low or Charging Flashes when locked and SEEK is pushed E Channel Designation lock status signal strength indication Pea battery life Battery Type Type 2 AA batteries alkaline or NIMH fuga CN LA 361 10 hours NiMH rechargeable Battery Charging NiMH only Fully Automatic 13 hours maximum Physical Door Manually Lockable Up down and power buttons through door Other controls behind door see controls Temperature Operation 10 C 14 F to 40 C 104 F Environmental Temperature Storage 20 C 4 F to 50 C 122 F 0 to 95 Relative Humidity non condensing Specifications are subject to change without notification LR 500 863 Specifications Architectural Specificat
28. nd cannot be transfered Warranty is only valid if warranty card hasbeen retumed oronline warranty registration hasbeen completed within 90 days of purchase This warranty is void if damage occurred because of misuse or if the product has been repaired or modified by anyone other than a factory authorized service technician Warranty does not cover normal wear and tearon the product or any other physical damage unless the damage wasthe result of a manufacturing defect Warranty doesnot include inbound freight costs Listen isnot liable for consequential damages due to any failure of equipment to perform as intended Listen shall bear no responsibility or obligation with respect to the manner of use of any equipment sold by it Listen specifically disclaims and negates any warranty of merchantability or fitness of use of such equipment including without limitation any waranty that the use of such equipment for any purpose will comply with applicable laws and regulations The terms of the warranty are govemed by the laws of the state of Utah In the first ninety days after purchase any defective product will be replaced with a new unit After 90 days Listen will at its own discretion either repair orreplace transmitters and receivers with a new unit ora unit of similar type and condition Product that isnot covered under warranty shall be repaired orreplaced with a unit of similar type and condition based on a flat fee This limited warranty prices a
29. nd the specifications of products are subject to change without notice Contacting Listen If technical service is needed please contact Listen Pre authorization is required before returning Listen products If products were damaged in shipment please contact the camer then contact Listen for replacement or repair requirements payable by the camer All Listen European markets are supported through the Listen Technologies GmbH office located in Oberasbach Germany For more information on Listen solutions contact Listen Technologies at 1 801 233 8992 1 800 330 0891 North America Listen Technologies GmbH at 49 911 955159 0 or visit www listentech com For Europe Middle East Africa and India office visit www listentech de 14912 Hentagecrest way Listen Technologies GmbH Salt Lake City Utah U S A 84065 4818 J asminstr 16 90522 Oberasbach Germany 1 801 233 8992 49 911 955 159 O Europe 1 800 330 0891 North America 49 911 955 159 40 Fax 1 801 233 8995 Fax support listentech de support listentech com www listentech de www listeentech com 67 3 al D 3 D 5 lt Notes Meu w jddns E www listentech com Listen Technologies Corporation 14912 Heritagecrest Way Bluffdale Utah 84065 4818 U S A 1 801 233 8992 1 800 330 0891 North America 1 801 233 8995 Fax www listentech com info listentec h com Listen Technologies GmbH J asmin
30. nel so that it will not change channels even if the SEEK button is pressed It is recommended to lock the receiver on a channel that is being used in a single channel system or when mul tiple systems are in the same area p To lock on a channel TA Press and hold the SEEK button for 5 seconds Press and hold the SEEK button for 5 seconds to lock a receiver onto the currently tuned channel Pressand hold the button again to unlock When locked the LED on top of the unit will flash when you press the SEEK button NOTE On the LR 400 500 when the channel is locked a lock icon will appear undemeath Listen on the display Also if the unit is locked the red LED on top of the receiver will flash when the SEEK button is pressed LR 400 500 Operating Instructions Squelch Programming Entering Squelch Program Mode E Tum unit off 2 Press and hold the SEEK button while holding SEEK button down turn the ON OFF VOLUME dial to turn the unit on Release the SEEK button when the Listen name disappears approximately 2 seconds and a two digit display is seen Adjusting the Squelch level 48 1052222222228 A ag Use the Channel UP and DOWN buttons to raise or lower the squelch sensitivity settings refer to the chart on page 49 for settings Lowernumbers mean that a less powerful and possibly noisy signal will be heard but you can have a longer range before the unit will squelch Once the desired squelch setting
31. nsmitters set the squelch setting to the highest level that doesn t squelch the receiver y gt jonbg on sBuoy JSOW yajanbs 3500 If in an area that has a lot of interference set the squelch high If you are in an area that has a lot of inference you may want to set the squelch setting to a high setting to ensure the interference isnot picked up by the receiver For maximum amount of range set the squelch to a low level If you need the maximum amount of range you may want to consider setting the squelch setting to a low level 0 1 or 2 NOTE Default squelch setting is 3 CAUTION When setting the squelch level low the reliability of squelch function is compromised This will cause radio noise to be heard in the earphone and there isa possibility of hearing damage 1 2 3 4 5 7 10 11 12 13 14 15 16 17 18 19 20 9BPuby 15091 Yyajanbs 1y BiL 49 50 LR 400 500 Operating Instructions DX Local DX is the normal operational mode Local mode can effectively limit any inter modulation and or interference in a busy RF environment This is done by limiting the amount of RF gain in the receiver When local mode isselected the range of the receiveriscompromised Depending on yourapplication and environment Local mode may be necessary for better performance DX mode is default DX Mode default DX is normal operation The local mode feature can be used when many frequenciesare being used Lo
32. nstructions E Reset to default settings 4A Press and hold the Up and Down channel buttons while turning the unit on Press and hold the Up and Down channel buttons while tuming the unit on This will light up allsegments of the display 4B After the transmitter has been reset After the tra nsmitter has been reset the display will rtum with defaults present NOTE The defaults are e Power Level P3 e Channel 01 Channel lockout All channels active Listen 100 fa PGM el In N Accessones for LT 700 Accessones LA 261 FLA 272 Lavalier Microphone Over the Head Microphor Over the Head Microphone w Earphone LA 274 0 LA 276 LA 277 Hand Held Microphone Collar Microphone Conference Microphone LA 304 LA 361 LA 278 Behind the Head Assistive Listening High Capacity AA Alkaline Microphone Notification Signage Kit Batteries 2 pa j Ki LAS i ha E bei LA 362 LA 311 16 Unit Portable Charging Carrying Case Rechargeable AA NiMH LA 313 16 Unit Portable Carrying Case Batteries 2 LA 317 4 Unit Portable Charging Carrying Case LA 318 4 Unit Portable Carrying Case LA 320 Configurable Carrying Case LA 321 8 Unit Portable Charging Carrying Case LA 322 8 Unit Portable Carrying Case LA 323 4 Unit Portable Charging Carrying Case w Removable Lid LA 324 8 Unit Portable Charging Carrying Case w Removable Lid LA 325 16 Unit Portable Charging Carrying Case w Removable Lid 28 Notes
33. r see controls Temperature Operation 14 to 104 F 10 to 40 C Environmental Temperature Storage 4 to 122 F 20 to 50 C 0 to 95 relative humidity non condensing Specifications are subject to change without notification 17 LF700 Block Diagram LCD Displa y Power Supply CPU Module 115 230VAC Universal 7 5 VDC 50 60 Hz Power Supply not included NiMH 2 AA Batteries Alkaline or NiMH ANTENNA RF Modulation 18 AAA AA EEE Powercharge indicator Red LED Companding Q Technology LT 700 Quick Reference 3 5mm Input Jack Connect a Listen microphone here LED When lit indicates unit has power when flashing unit is muted charging Articulating Flexible Antenna Power Charging Porte Front Door Lock ALKALINE Channel Select Buttons amp Channel Display Displays the channel the LT 700 is currently on a RF Output 0 Mute On Off switch Look amp Listen Display Shows transmit level channel programming battery status and lock status Power Button Turns power On Off Battery Select Switch Choose the type of battenes being used Battery Compartment Place 2 AA batteries in compartment Be sure to follow polarity pattem Indicator Indicates ef SOF So mw ent Listen ST E Battery Level Indicator PGM Y Lo ES SESS Program e O Indicates while in function is in e progra
34. red 25 LI 700 Programming Instructions Once in the program mode a function menu is displayed Function 1 F1 is displayed as default Pressing the channel up or down buttons will sc roll through the functions Pressing the power button will enterthat function Fl Channel Lock out No channels are locked out as default Pressing the up and down buttons will scroll through channels Pressing the power button will toggle between lock lockout for that channel When a channel is locked out the L O on the LCD shall be displayed F2 Transmitter Power High transmit power P3 is the default Pressing the channel up button will toggle through the following settings a Low power LCD displays P1 b Med power LCD displays P2 c High power LCD displays P3 4 When no button is pressed for 10 seconds the program menu isexited altogether regardless of whethera function is entered or not To exit out of the program menu or function manually 4A When in the programming menu Press and hold power for 2 seconds This exits the program mode When in a programming function Press and hold power for 2 seconds This exits the function and goes back to the programming menu AC Pressing and holding powerfora full 4 seconds will exit both programming function and programming menu 26 PP PEESSSSOD gg LI 700 Programming Instructions Resetting to defaults To reset the transmitter to default settings follow these i
35. smitter and Receiver Transmitter power level The RF power level can be adjusted on the LT 700 refer to page 26 for programming LT 700 power levels The lowerthe power setting the lessrange the transmitter will broadcast Decreasing the broadcast range will force the receiversto remain closerto the transmitter To maintain an RF signal the higher power settings will increase range between transmitter and receiver thus introducing a higher probability of multipath Multiple Portable Systems In some applications there will be more than one RF transmission in the same general vicinity Intermodulation interference can occur if the transmission frequencies are too close together Here are some ways to eliminate the chance of RF interference Squelch Much like a multipath situation tightening the squelch on the receiver will mute the audio output when the signal istoo weak to be received Tightening the squelch will help with force the receiver to squelch when signal becomes too weak refer to page 48 for programming squelch Transmitter power level As mentioned above the RF power level can be adjusted on the LT 700 refer to page 26 for programming LT 700 power levels The lower the power setting the less range the transmitter will broadcast Lowering the power could help decrease the amount of interference if there are many frequencies being used in the vicinity Spacing of channels Use a Listen frequency chart on page 61 to det
36. str 16 905 22 Oberasbach Germany 49 911 955159 O EMEAI 49 911 955159 40 Fax www listentech de info listentech de Printed in the United States of America O 2007 Listen Technologies Corporation All Rights Reserved 20071015
37. the line level input it will not be affected by the mute talk switch Locking the Transmitter on One Channel The unit can be electronically locked on one channel so that it will not change channels even if the channel select buttons are pressed It is recommended to lock the transmitter on a channel that is being used in a single channel system orwhen multiple systems are in the same area 1 To lock on a channel 1A Press and hold the DOWN button for 5 seconds Pressand hold the DOWN button for 5 secondsto lock the transmitter onto the desired channel Press and hold the button again to unlock NOTE On the LT 700 when the channel is locked a lock icon will appear undemeath Listen on the display 24 LI 700 Programming Instructions Program Mode Overview The LT 700 can be programmed to transmit on a limited number of channels For applications where users are required to select a channel such as classrooms or language interpretation application and you don t want them to have to scroll through all of the available channels this feature is ideal The LT 700 can also be changed from high to low power levels Adjusting the power settings allows you to set the range of the transmission Entering Program Mode 1 While the unit isON pressand hold the channel down and up buttons simulta neously for 3 seconds 2 The PGM icon on the LCD will appearindic ating program mode is ente
38. ut Channel Lock DX Local squelch LED Red illuminated when unit is on Flashes when batteries are low or nie Charging Flashes when locked and SEEK is pushed LCD Display Channel Designation lock status signal strength indication pro gramming Battery Type Type 2 AA batteries alkaline or NIMH Battery Life Listen 20 hours alkaline LA 361 10 hours NiMH rechargeable LA 362 batteries Battery Charging NiMH Fully Automatic 13 hours maximum only Physical Door Manually Lockable Up down and power buttons through door Other controls behind door see controls Temperature Operation 10 C 14 F to 40 C 104 F Environmental Temperature Storage 20 C 4 F to 50 C 122 F 0 to 95 Relative Humidity non condensing Specifications are subject to change without notification 38 LR 400 500 Block Diagram LCD Display O H Down Power Supply O CPU Module O k 115 230VAC Universal see uu 50 60 Hz Power Supply gt 0 u IRE not included o e NiMH 2 AA Batteries Alkaline or NIMH o POWER a PAZ Qof ANTENNA E E p _ ompanding VOLUME lt 3 5 mm Connector O Sleeve O lt Ring LR 400 863 Quick Reference 3 5 mm Output Jack Connect a listen earpiece here Articulating Flexible Antenna J LED When lit indicates unit has power e On Off and Volume Control Dial Look amp Listen Display Shows receive level c
39. ut of squelch when the receiver is moved Portable applications are much more susceptible to multipath than those that are stationary Multipath distortion is often worse asthe distance between transmitter and receiver increases RF power decreases Multipath can decrease the audio quality of the transmission refer to page 9 for strategies on eliminating multipath e Antenna Positioning For full RF functionality of the portable system the antenna on both the LT 700 transmitter and receiver LR 400 500 must be in the upright position shown below System Overview There are three main parts to a Portable FM System Input source transmitter and receiver Q 2 gt Q o G A LA 278 Behind the Head Microphone 500 other microphones available LT 700 363 LR 400 863 Portab E che u ble Portable Display FM Portable Display FM gl Display FM Receiver 863 MHz Transmitter 863 MHz Receiver 863 MHz Input Source A microphone is the most common input source for the LT 700 transmitter although the LT 700 can transmit two audio inputs at once on one transmission channel With the use of the LA 263 both the inputs will be mixed Thus a personcanusea line input source and mic source 3 5mm Phone Wining Unbalanced Mic input System Overview Transmitter The LT 700 modulates the audio on an FM carrier and transmits the signal via an anten na on the unit LT 700 863 Portable Display FM Transmitt
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