Listen Technologies LR-300 User's Manual
Contents
1. LR 500 Spec ifi ations Architectural Specifications The FM reciever shall be capable of receiving on 57 wide and band channels with a SNR of 80dB or greater The receiver shall be programmable to electronically lock out unneeded channels The receiver shall be capable of seeking channels The device shall have an adjustable squelch The device shall have an audio frequency response of 63 Hzto 15 KHz 3dB at 72 MHz or 63 Hzto 10 KHz at 216 MHz The device will incorporate a stereo headset jack that allowsthe userto plug in eithera mono orstereo headset The device shall incorporate an LCD display that indicates channel channel lock or lock status battery level battery charging and RF signal strength The receiver shall incorporate automatic battery charging circuitry for recharging of batteries The Listen LR 500 is specified Specifications Specification LR 500 072 LR 500 216 RF Frequency Range 72 025 75 950 MHz 216 025 216 975 MHz Number of Channels 57 17 wide 40 narrow 57 19 wide 38 narrow typical 1 uV maximum for 12dB SINAD RF All system specifications are wireless end to end System Frequency Response 63 Hz 15 Hz 3dB 63 Hz 10 kHz 3dB System Signal to Noise Ratio A weighted SQ enabled 80dB SOM enabled 80dB SOM disabled 60dB SOM disabled 50dB lt 2 total harmonic distortion THD at 80 deviation 3 5 mm connectors unbalanced 0dBu nomia2. len User s Manual www listentech com LR 500 Portable Programmable Display FM Receiver LR 400 Portable Display FM Receiver LR 300 Portable Digital FM Receiver iss a single sound 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 pnde 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 dunng installation orin the operation of our products Should you expenence any problems whatsoever with your Listen products we are ready to help you in any way we can with prompt efficient customer care Because at Listen it s all about you And should you have any comments 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 support listentech com www listtentech com Thank you and enjoy your listening expenence Best regards Russell Gentnerand the Listen Team e In the few instances where repairs were needed 99 of all clients indicated that they were happy with repairtum around times and 85 of the time clients were without their product for less than 10 days Overall client satisfacti
3. To charge the batteries using the LA 202 wall transformer plug the transformer into the jack marked PWR CHG on the side of the unit The unit can be operated while the batteries are charging To charge the batteries using a drop in charger simply place the unit into a slot in the chargerand connect the chargerto power Make sure the unit is fully seated in its slot SmartCharge usesa pulse charging which greatly extends the life of Nickel Metal Hydnde batteries The entire charging processtakes 13 hours Listen recommends that you allow the charger to complete its full cycle every time for maximum battery life NOTE In order to charge NiMH battenes the BATTERY SELECT switch in your Listen product must be set to the NiMH setting Use a pen or small screwdriver to move the switch located in the battery compartment to the proper position Connect LA 202 here and plug into an AC wall outlet IMPORTANT DO CHARGE ANY TYPE OF BATIERY 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 battenes include destruction of property or fire During the charge cycle the red LED on top of the Listen product will flash slowly When charging iscompleted the LED will tum off It isnot necessary to unplug the charger however if you unplug the unit fro
4. e SEEK Button Allows the user to search for orlock onto an active channel e Battery Select Switch Choose the type of battenes being used Alkaline or NIMH e SQ Switch Tums SQ On Off Battery Compartment Place two 2 AA battenes in compartment Be sure to follow polanty pattem LR 300 Setup Instructions Remove the product Remove outer packaging and plastic cover Inspect for physical damage If damage isapparent please contact Listen Technologies Corporation technical support for assistance Open the front access door If locked use a pocketknife or small screwdriverto unlock the doorlocks on both sides of the unit To unlock the door rotate the lock 1 4 tum counterclockwise the two tabs with yourthumb and index finger and pull the door downward Do NOT place battenes in the unit yet lt Select Battery Type You have two choices NIMH and Alkaline The unit is shipped with the switch Unlocked Locked in the Alkaline position Use a pen or small screwdnver to select the battery type CAUTION if you are using any battery type other than rechargeable Nickel Metal Hydnde batteries make sure the BATTERY selection switch is in the alkaline position WARNING Do not place the BATTERY switch in the NiMH position if you are not using Nickel Metal Hydride Batteries T
5. e Use the Channel UP and DOWN buttons to raise or lower the squelch sensitivity settings e lowernumbers mean that a less powerful and possibly noisy signal will be heard but you can have a longerrange e Higher numbers mean that a more powerful signal with no noise will be heard but you may have a shorter range Once the desired squelch setting is found press seek to exit the squelch programming mode Squelch setting 00 is no squelch this effectively disables Squelching capabilities of the receiver Squelch setting 20 is maximum squelch sensitivity you must have a very strong and stable RF signal forthe unit to not engage the squelch feature Adjusting the squelch setting will keep your LR 500 receiver from picking up noise when the transmitter is not transmitting or when you lose the signal by being out of range or if encountering interference 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 during the squelch function The Listen SQ feature is not squelch please referto page 45 for information on Listen SQ LR 500 Charging Battenes The LR 500 and all Listen receivers are unique because they have SmartCharge chargers built in When any of these units are connected to an LA 202 wall transformer or dropped into a Listen charging case NIMH batteries will be charged
6. extends the life of Nickel Metal Hydnde batteries The entire charging process takes 13 hours Listen recommends that you allow the charger to complete its full cycle every time for maximum battery life NOTE In order to charge NiMH battenes the BATTERY SELECT switch in your Listen product must be set to the NiMH setting Use a pen or small screwdnver to move the switch located in the battery compartment to the proper position Connect LA 202 here and plug into an AC wall outlet IMPORTANT DO NOT ATIEMPT TO CHARGE ANY TYPE OF BATTERY OTHER THAN NiMH NIC KEL METAL HYDRIDE with your Listen equipment Alkaline batteries may explode when connected to a charger Other nsks of charging non NiMH battenes include destruction of property or fire the charge cycle the red LED on top of the Listen product will flash slowly When charging iscompleted the LED will tum off It isnot necessary to unplug the charger however if you unplug the unit from the chargerand then plug it back in it will begin the 13 hour charge Cycle over again When not using the LR 300 it is recommended to leave the unit on the charger The charger providesa maintenance charge that keepsthe 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 high performance constant current NiMH Nickel Metal Hydnde batteries These may be purchas
7. Door see Controls above 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 LR 500 Quick Reference 3 5 mm Output ack Connect a Listen earphone s here eLED When lit indicates unit has power When batteries are low or charging the LED flashes e On Off and Volume Control Dial voreliER 4 Articulating Hexible Antenna Place in upright position when Look disten Display in use Shows receive level channel programming battery status and lock status Power Charging Porte e SEEK Button Allowsthe userto search for orlock onto an active channel Channel Select Buttons e Battery Select Switch Choose the type of battenes being used Alkaline or NIMH FrontDoorlock e SQ Switch TumsSQ On Off Battery Compartment Place two 2 AA battenes in compartment Be sure to follow polanty pattem Channel Display Displays the channel the LR 500 863 is currently on RF Receive Indicator Indicates the RF receive level e x e 9 ERI eee a litte 4 S uo LA PGM nee Sad 9 Battery Level Indicator PGM e Indicates while in programming Program function is in process mode the specific channel hasbeen locked out 9 Lock Icon Indicates the unit is locked on current channel LR 500 Setup Instructions Remove the product R
8. switch on your transmitter and receivers istumed ON or OFF if some of your equipment is SQ capable Make sure you are not too close to the transmitting antenna If you can t get farther away from the antenna tum down the RF output poweron the stationary LT 800 transmitter There is interference Try different frequencies on the transmitter and receivers until you find a clear channel If this does not work try a different frequency band i e if you are using 72 MHz try 216 MHz or vice versa This is accomplished by retuming the equipment to Listen at no charge Please contact Listen technical support for assistance see page 52 for information My LR 300 sounds distorted or there is no audio Because the LR 300 has no LCD display it is important to recognize when the unit is locked on a channel If the unit sounds distorted orthere is no audio heard and pressing the seek button does not comect the problem the unit is probably locked on the wrong channel Press and hold the seek button for 5 secondsto unlock cannot pick up the signal on the receiver Checkto make sure the receiver and the transmitter are on the same frequency and channel Also make sure the receiver is in broadcast range of the transmitter can pick up the signal on the receiver but it sounds like it s not tuned in Check to make sure the transmitter and receiver are on exactly the same channel number letter If you re using the LR 300 re scan the cha
9. 2375 rows A O B 2 1 EA 216 2625 216 2750 216 2875 216 3125 216 3250 E 216 3375 216 3625 216 3750 216 3875 fF o 216 4125 216 4250 216 4375 216 5125 216 5250 E F H 216 1125 216 1250 216 1375 216 1625 2161750 216 1875 216 2125 216 2250 216 2375 216 2625 216 2750 216 2875 216 3125 216 3250 216 3375 216 3625 216 3790 216 3875 2164125 216 4250 2164375 2165125 216 5250 Frequency Phonak MHz Listen Microfield Comtek Williams Gentner CSI AVR 2165375 X 62 22 1 21656086 28 23 UN o e 5 2165875 3L a 24 cad Na 216625 IM 6 2 C 2M 55 5 J 8 2166375 am 8l 26 2166805 IN 82 7 o Cee K 13 18 93 2166875 34 68 28 2167127 2 ca 2167260 29 55 5 L 4 19 21607375 3P 83 30 21670585 IR 84 3 2157750 R 5 56 6 4 216785 72 32 Ca N72 2168125 15 73 33 2168250 25 57 57 13 2168375 35 76 34 1 2168 0 2L 58 58 9 216887
10. 80dB SOM disabled 60dB SOM disabled 50dB lt 2 total harmonic distortion THD at 80 deviation 3 5 mm connectors unbalanced 0dBu nomial output level 16mW maximum Output impedance 32 Ohms Set Up Controls Alkaline NiMH batteries and SQ enable disable and programmable squelch setting Volume channel UP DOWN SEEK All controls except volume are electronically User Controls lockable and are behind the door Controls Squelch can be adjusted for sensitivity and signal capture control Channel selection Programming can be locked by holding the SEEK button for 5 seconds Unit cannot be programmed to seek only used channels however it is capable of entering squelch mode LCD Display Indicates channel RF signal strength lock status and squelch setting Indicators LED Red illuminates when unit is on Flashes when batteries are low Flashes when charg ing Flashes when locked and user attempts to seek to another channel Battery Type Two AA batteries alkaline or NiMH Battery Life Listen batteries 30 hours alkaline LA 361 15 hours NiMH rechargeable LA 362 Battery Charging NiMH only Fully automatic 14 hours 2 3 mm OD by 0 7 mm ID barrel type connector 7 5VDC center positive lt 250mA Drop in contact points for use with Listen charging carrying cases UL Listed Dimensions Wx Dx H 3 0 x 1 0 x 4 25 in 7 6 x 2 5 x 13 cm Unit Weight 3 9 oz 1118 Physical 1 1 1 1 8 02 Power Supply Connector Unit W
11. radiate radio frequency energy and if not installed and used in accordance with the instructions may cause ha rmful interference to radio communications However there is no guarantee that interference will not occurin a particular installation If this equipment does cause harmful interference to radio ortelevision reception which can be determined by tuming the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures 9 Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is e connected e Consult the dealer oran experienced radio TV technician for help This equipment has been certified to comply with the limits fora class B computing device pursuant to FCC and IC Rules In orderto maintain compliance with FCC and IC regulations shielded cables must be used with this equipment Operation with non approved equipment or unshielded cables is likely to result in interference to radio and TV reception The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the user s authority to operate this equipment 51 O 3 Warranty amp Contacting Listen Listen Technologies Corporation Listen warrants its transmitters and receivers LT 82 LT 700 LT 800 L
12. the side of the unit The unit can be operated while the batteries are charging Mall the battenes using a charger ME the unit into a slot in the chargerand connect the chargerto power Make sure the unit is fully seated in its slot SmartC harge usesa pulse charging extends the life of Nickel Metal Hydnde batteries The entire charging process takes 13 hours Listen recommends that you allow the charger to complete its full cycle every time for maximum battery life NOTE In order to charge NiMH battenes the BATTERY SELECT switch in your Listen product must be set to the NiMH setting Use a pen or small screwdnver to move the switch located in the battery compartment to the proper position Connect LA 202 here and plug into an AC wall outlet IMPORTANT DO NOT ATIEMPT TO CHARGE ANY TYPE OF BATTERY OTHER THAN NiMH NIC KEL METAL HYDRIDE with your Listen equipment Alkaline batteries may explode when connected to a charger Other risks of charging non NiMH battenes include destruction of property or fire During the charge cycle the red LED on top of the Listen product will flash slowly When charging is completed the LED will tum off It is not necessary to unplug the charger however if you unplug the unit from the chargerand then plug it back in it will begin the 13 hour charge Cycle over again When not using the LR 400 it is recommended to leave the unit on the cha
13. 5 31 86 36 2189125 u 7 3 car N7 9216950 2U 5 V 216 9375 3U 88 38 21690900 iV 79 3 col 7169750 2V 9 o 5 2169875 1280 4 5 48 Troubleshooting LR 300 LR 400 LR 500 Receivers Troubleshooting The receiver has no power Make sure the unit has either fully charged battenes ora Listen approved wall transformer connected Make sure the VOLUME knob has been rotated to the ON position If this does not work try a different set of batteries Make sure the batteries are installed properly There is no audio Make sure you have tumed the volume control up Make sure the earphone is plugged all the way into the jack on the top of the unit Make sure the tra nsmitter is broadcasting an audio source Make sure you re tuned to the same channel as the transmitter If the RF signal is too weak the receiver will squelch and mute the audio source move closer to the antenna or make sure the transmitter s output RF power switch is set on FULL 11 800 The audio is distorted Make sure you re receiving on the correct channel Make sure the audio on the transmitter is not tumed up too loud this will cause distortion Make sure the earphone connector is pushed all the way into the jack on top of the unit If you re using the LR 300 re scan the channels to find the clearest channel Make sure the SQ
14. 5500 72 5750 726000 O O 72 6250 72 6500 726750 14 4 727000 D 72 7250 747500 747750 36 6 36 36 4049 Frequency Phonak Phonic MHz Listen Microfield Ear Comtek Williams Gentner Telex 75 2250 37 7 3 37 1147 752500 8 23 E 752750 38 38 38 04249 J So 753000 J J J J 1350 24 P 75 3250 39 39 166550 75 3500 75 3750 75 4000 75 4250 75 4500 75 4750 40 0 75 5000 11 01 1 R 21 2 75 5250 75 5500 75 5750 75 6000 75 6250 75 6500 75 6750 757 75 7250 27 97 27 27 64608 75750 3 gt 757750 28 68 28 28 es gt 75 8250 29 19 29 29 6670 7580 1 82 3 gt 75 8750 30 o 5 30 6 75 gt 759250 3 H a 31 6591 7595 1 99 a 75970 32 m 3 8679 ae 5 Parenthesis indicate T35 and T20 namowband NOTE Wideband frequencies in highlighted rows 47 1 216 MHz Compatibility Chart Frequency Phonak Light MHz Listen Microfield Comtek Williams Gentner CSI AVR 216 012 216 025 216 037 216 062 216 075 216 087 216 1125 216 1250 216 1375 216 1625 216 1750 216 1875 216 2125 216 2250 NOTE Wideband frequencies in highlighted L ac 2 6 3D 8 8 um 216
15. Contents e LR 300 Portable Digital FM Receiver 72 MHz or 216 MHz Listen Part Number e LR 300 072 72 MHz 36 LR 300 Spec if ations Architectural Specifications The FM receiver shall be capable of receiving on 17 wide band channels and have a SNR of 80dB or greater The receiver shall be capable of seeking channels The device shall have a squelch The device shall have an audio frequency response of 63 Hz to 15 KHz 3dB at 72 MHz The device shall incorporate a stereo headset jack that allows the user to plug in eithera mono or stereo headset and listen to audio normally The receiver shall incomorate automatic battery charging circuitry for recharging of NiMH batteries The Listen LR 300 is specified Specifications Specification LR 300 072 RF Frequency Range 72 025 75 950 MHz Number of Channels 17 wide band GuV typical 1 maximum for 1248 NINAD Er RF Uses earphone cable Squelch Automatic on loss of RF signal Part 15 Industry Canada Frequency Accuracy 005 stability 32 to 122 F 0 to 50 C All system specifications are wireless end to end System Frequency Response 63 Hz 15 kHz 3dB System Signal to Noise Ratio A weighted SQ enabled 80dB SQ disabled 60dB lt 2 total harmonic distortion THD at 80 deviation 3 5 mm connectors unbalanced 0dBu nomial output level 16mW maximum Output impedance 32 Ohms Set Up Controls Alkaline NiMH batteries SQ enable disable C
16. R 100 LR 42 LR 44 LR 300 LR 400 LR 500 LR 600 to be free from defects in workmanship and material under normal use and conditions for the useful lifetime of the product from date of purchase Listen warrants its Stationary IR Radiators LA 140 to be free from defects in workmanship and material under normal use and conditionsforthree yearsfrom 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 conditionsforone yearfrom date of purchase Listen warrants its Charging Canying Cases LA 306 LA 311 LA 313 LA 317 LA 318 LA 319 LA 320 LA 321 LA 322 LA 323 LA 324 LA 325 to be free from defects in workmanship and material under normal use and conditionsfor one yearfrom date of purchase All other products and accessories are warranted for 90 daysfrom date of purchase This warranty isonly available to the original end purchaserof the product and cannot be transfemed Warranty is only valid if warranty card hasbeen retumed within 90 days of purchase This warranty is void if damage occurred because of misuse or if the product hasbeen repaired or modified by anyone otherthan a factory authorized service technician Warranty doesnot covernomal wearand tearon the product orany other physical damage unlessthe damage wasthe result of a manufacturing defect Listen is not liable for consequential damages due to any failure of equipment to perform a
17. Receivers are tumed on by rotating the volume dial counterclockwise The red LED on top of the unit should activate and the LCD display should illuminate If they do not make sure you have installed the batteries correctly and that you are using fully charged batteries Red LED will illuminate when on e Ium volume knob counterclockwise to tum on Earphone Headsetjack e 40 LR 300 Operation Instructions Make Sure the Unit is On Rotate the volume knob counterclockwise with an earphone orheadset connected to the unit Listen receivers use the cable of the earphone or headset asa receiving antenna Be careful when tuming the unit on if you tum the knob too far you might get too much volume in your earphone Test the audio If a transmitter is broadcasting on that channel you will be able to hearthe audio If the signal is too weak the audio will be muted squelched Find an audio transmission using SEEK Another way to find a channel on the LR 300 isto use the SEEK button When you do this the Listen receiver looks for the next active channel Sometimes the unit will mistake interference fora real broadcast signal If you get interference pressthe 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 Adjust the volume control Use the control dial
18. e signal from the transmitter is tumed 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 the audio on different RF signal strengths This is useful as follows e To ensure that users don t hear transmissions from other transmitters set the squelch setting to the highest level that doesn t squelch the receiver e f the receiver is going to be close to the transmitter i e in a classroom setting the squelch setting high so that when the transmitter is tumed off it immediately squelches and ignores transmitters in other rooms e If you are in an area that hasa lot of inference you may want to set the squelch setting to a high setting to ensure the interference isnot picked by the receiver e 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 CAUTION When setting the squelch level low the reliability of squelch function is compnsed This will cause radio noise to be heard in the earphone and there is a possibility of hearing damage Squelc h Programming Instructions Squelch Programming To enter Squelch programming mode e Tum the unit off e Pressand hold the seek button while still holding seek tum the ON OFF dial to tum the unit on e Release the seek button when the Listen name disappearsand a two digit display is seen To adjust the Squelch level
19. e the SEEK button When you do this the Listen receiver looks for the next active channel Sometimes the unit will mistake interference fora 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 Adjust the volume control Use the control dial on the top of the unit to adjust the volume to a comfortable level Volume Control Dial 27 28 LR 400 Operation Instructions To Lock into Only One Channel Press and hold the SEEK button for 5 seconds to lock a receiver onto the currently tuned channel Press and hold the button again to unlock When locked the LED on top of the unit will flash when you pressthe SEEK button Is the Channel Locked on My Receiver On the LR 400 when the channel islocked the padlock icon will appearon the display If the unit is locked the red LED on top of the unit will flash when you press the SEEK button If locked LED flashes on all portable receivers when SEEK button is pressed Padlock appears when locked LR 400 Squelch Squelch The purpose of squelch isto mute the audio output of your receiver when the signal from the transmitter is tumed off or is too weak to be received Without squelch you would hear radio noise in your earpho
20. e this product with older Listen systems or equipment not manufactured by Listen you should disable SQ Your Listen equipment has been shipped to you with the SQ feature enabled You may need to disable the SQ function for one or more of the following reasons l You are using your new Listen system with older version Listen equipment that does not have the SQ function 2 You are using your new Listen system with equipment supplied by other manufacturers 3 You expect that end users may bring and use their own receivers that don t have the SQ function 50 Summary Improves noise performance by atleast 20dB e SQ isNOTcompatible with older version Listen products e SQ isNOTcompatible with other manufacturers products e SQ is NOTsquelch To work properly SQ must be enabled for both the transmitter and receivers SQ can be disabled to permit operation with older Listen products or other manufacturers products 45 3 E 2 46 RF Reception Maximization Strategies For properand dependable operation Listen receivers should receive a strong and consistent signal from the originating transmitter The following strategies should be used to maximize this signal a Q ID L When designing and installing your system keep in mind that the location of both the transmitter and receivers is cntical to maximizing signal strength Eliminate or minimize obs
21. ed from your Listen dealer ask for part number LA 362 42 LR 300 Wall Transformer Operation The LR 300 will operate normally when connected to a wall transformer Use Listen part number LA 202 available from any Listen dealer Connect the wall transformer to the jack on the side of the LR 300 marked PWR CHG and plug the wall transformer into a grounded AC outlet You do not need to have batteries installed in the LR 300 to operate it with a wall transformer NOTE If battenes are in the unit ensure that the battery selection switch is set properly as shown on page 39 Please review the information on page 42 for important information regarding battery type and charging The LA 202 wall transformer plugs into the side of your portable transmitter or receiver 43 Channel Selection It is highly recommended that after channel selection has been achieved you lock the channel so that it cannot be changed by the user To accomplish lock on receivers press and hold seek for 5 seconds Repeat the processto unlock It is important to choose channels that are free from interference to achieve proper operation of your Listen equipment This process 15 trial and error Before tuming on the transmitter listen to the wide band channels lettered channels at 72 MHz and channels that start with a 2 for 216 MHz Listen to the audio through the headphone or via the speaker Choose a channel with the least amount of int
22. eight with batteries 5 8 oz 164 4 g Shipping Weight 1 0 lbs 453 6 kg Manually lockable UP DOWN and SEEK protected by door 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 23 LR 400 Quick Reference Power Charging Porte Channel Select Buttons e Front Door Lock e RF Receive Indicator Indicates RF receive level e 24 3 5 mm Output ack Connect a Listen earphone s here LED When lit indicates unit has power When batteries are low orcharging the LED flashes e On Off and Volume Control Dial gt s Look amp disten Display Showsreceive level channel programming battery status and lock status e SEEK Button Allows the userto search for orlock onto an active channel Battery Select Switch C hoose the type of battenes being used Alkaline or NIMH e SQ Switch TumsSQ On Off Battery Compartment Place two 2 AA battenes in compartment Be sure to follow polanty pattem Channel Display Displays the channel the LR 500 863 is currently on o 9 9 9 ii nu Battery Level Indicator Lock Icon Indicatesthe unit is loc ked on cument channel LR 400 Setup Instructions Remove the product Remove outer packaging and plastic cover Inspect for physical damage If damage isapparent please contact Listen Techn
23. emove outer packaging and plastic cover Inspect for physical damage If damage isapparent please contact Listen Technologies Corporation technical support for assistance Open the front access door If locked use a pocketknife or small screwdriverto unlock the doorlocks on both sides of the unit To unlock the door rotate the lock 1 4 tum counterclockwise the two tabs with yourthumb and index finger and pull the door downward Do NOT place battenes in the unit yet lt Select Battery Type You have two choices NIMH and Alkaline The unit is shipped with the switch Unlocked Locked in the Alkaline position Use a pen or small screwdnver to select the battery type CAUTION if you are using any battery type other than rechargeable Nickel Metal Hydnde batteries make sure the BATTERY selection switch is in the alkaline position WARNING Do not place the BATTERY switch in the NiMH position if you are not using Nickel Metal Hydride Batteries The NiMH position will attempt to charge any batteries in the unit even if they are not the proper type Charging non Nickel Metal Hydride NiMH batteries will result in physical harm destruction of property and or fire Set SQ switch The SQ switch is inside the battery compartment next to the Battery Select switch The unit is shipped with SQ in the ON posi
24. erface Unless you are interfacing with an existing narrowband transmission system always use a wide band channel If you are using multiple channels follow this process a Same Space If you are using transmitters in the same space the most number of channels that will work simulta neously is six at 72 MHz and three at 216 MHz With all of the transmitters off listen for interference on all the wide band channels via the headphone jack Using the frequency compatibility tables on pages 47 48 eliminate any channelsthat have noticeable interference Now choose the channels with the widest channel spacing It is recommended that adjacent channels be spaced at least 300 KHz If there is no interference the following channels are recommended A C E and for 72 MHz and channels 2A 2K and 2V at 216 MHz b Distributed Spacing If you are using transmitters that are spread out over space you can achieve more simultaneous broadcast channels However it is critical that your receiver s be located as Close to its transmitter as possible You can use adjacent channels see frequency compatibility tables on pages 47 48 in this case aslong asthe adjacent channel transmitter is at least 50 further away from the receiver as its transmitter Example The transmitter for the receiver on channel is 100 feet from the receiver The adjacent channel transmitter on channel D should be at least 150 feet away Notes in regard to using 72 MHz and 216 MHz s
25. es 13 and 14 for squelch and programming information Program Channels see page 13 Red LED will illuminate when e Tum volume knob counterclockwise to tum on Earphone Headsetjack e LCD display will activate when on LR 500 Operation Instructions Make Sure the Unit is On Rotate the volume knob counterclockwise with an earphone orheadset connected to the unit Listen receivers use the cable of the earphone or headset asa receiving antenna Be careful when tuming the unit on if you tum the knob too far you might get too much volume in your earphone Select a Channel Select the channel to match the transmission channel by pressing the UP and DOWN buttons on the receiver Listen recommendsthe use of wide band channels At 72 MHz 72 MHz receivers operate on 17 wide band channels and 40 narow band channels Channels represented by letters on the display 16 A are wideband channels channels represented by numbers are narowband channels At 216 MHz 216 MHz receivers operate on 19 wide band channels and 38 band channels Channel numbers starting with a 2 are wide band channels beginning with a 1 or 3 are narow band channels Referto the Frequency Compatibility Tables pages 47 48 for specific frequencies and compatibility with other ma nufa cturers Test the audio Ifa transmitter is broadcasting on that channel you will be able to hearthe audio If the signal i
26. ference Setup Instructions Operation Instructions Squelch Information Squelch Programming Charging Battenes Wall Transformer Operation 21 LR 400 Package Contents LR 400 Contents e LR 400 Portable Display FM Receiver 72 MHz 216 MHz Listen Part Number e R 400 072 72 MHz e R 400 216 216 MHz 22 LR 400 Spec fic ations Architectural Specifications The FM receiver shall be capable of receiving on 57 wide and narow band channels with a SNR of 80dB or greater The receiver shall be capable of seeking channels The device shall have an adjustable squelch The device shall have an audio frequency response of 63 Hz to 15 KHz at 72 MHz or of 63 Hz to 10 kHz 3dB at 216 MHz The device will incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset and listen to the audio normally The device shall incomorate an LCD display that indicates channel battery level low battery battery Charging RF signal strength and channel lock status The receiver shall incorporate automatic battery charging circuitry for recharging of NIMH battenes The Listen LR 400 Is specified Specifications Specification LR 400 072 LR 400 216 005 stability 32 to 122 0 to 50 C All system specifications are wireless end to end System Frequency Response 63 Hz 15 Hz 3dB 63 Hz 10 kHz 3dB System Signal to Noise Ratio A weighted SQ enabled 80dB SOM enabled
27. he NiMH position will attempt to charge any batteries in the unit even if they are not the proper type Charging non Nickel Metal Hydride NiMH batteries will result in physical harm destruction of property and or fire Set SQ switch The SQ switch is inside the battery compartment next to the Battery Select switch The unit is shipped with SQ in the ON position To tum it off use small screwdriveror pen to slide the switch to the OFF position to the nght See page 45 for more information on SQ e SQ Select Switch Battery Select Switch sei et SEEN O BATTERY A WARNING y JE E Place Battenes in Unit Place two AA battenes in the compartment making note of the battery polanty shown in the battery compartment and again venfying that the BATTERY SELECT switch isin the correct position forthe battenes you are using ALK should be selected for all battery types other than NiMH NOTE Listen provides industial strength AA alkaline batteries part number LA 361 and high performance AA Nickel Metal Hydride battenes part number LA 362 These may be purchased from your Listen dealer 39 LR 300 Setup Instructions 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 Turn the Unit On
28. l output level 16mW maximum Output impedance 32 Ohms UP Controls Programmable channel selection see below alkaline NiMH batteries and squelch P SOM enable disable Volume channel UPIDOWN SEEK All controls except volume are electronically User Controls Controls lockable Unit can be programmed so that only desired channels are displayed Squelch can be Programming adjusted for sensitivity and signal capture control Channel selection can be locked by holding the SEEK button for 5 seconds LCD Displa Indicates channel RF signal strength lock status squelch battery power level and channel programming Indicators LED Red illuminates when unit is on Flashes when batteries are low Flashes when charg ing Flashes when locked and user attempts to seek to another channel Battery Type Two AA batteries alkaline or NiMH Battery Life Listen batteries 30 hours alkaline LA 361 15 hours NiMH rechargeable LA 362 Battery Charging NiMH only Fully automatic 14 hours 2 3 mm OD by 0 7 mm ID barrel type connector 7 5VDC center positive lt 250mA Power Supply Connector Drop in contact points for use with Listen charging cases UL Listed Dimensions Wx Dx H 3 0 x 1 0 x 4 25 in 7 6 x 2 5 x 13 cm Unit Weight 3 9 oz 1118 Physical Unit Weight with batteries 5 8 oz 164 4 g Shipping Weight 1 0 lbs 453 6 kg Manually lockable UP DOWN and SEEK through door other controls behind door
29. m the chargerand then plug it back in it will begin the 13 hour charge cycle over again When not using the LR 500 it is recommended to leave the unit on the charger The charger providesa 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 high performance constant current NiMH Nickel Metal Hydnde battenes These may be purchased from your Listen dealer ask for part number LA 362 15 LR 500 Wall Transformer Operation The LR 500 will operate normally when connected to a wall transformer Use Listen part number LA 202 available from any Listen dealer Connect the wall transformer to the jack on the side of the LR 500 marked PWR CHG and plug the wall transformer into a grounded AC outlet You do not need to have battenes installed in the LR 500 to operate it with a wall transformer NOTE If battenes are in the unit ensure that the battery selection switch is set propeny as shown on page 9 Please review the information on page 15 for important information regarding battery type and charging The LA 202 wall transformer plugs into the side of your portable transmitter or receiver 16 Listen User s Manual www listentech com LR 400 Portable Display FM Receiver iss a single sound LR 400 Table of Contents Package Contents Architectural Specifications Specifications Quick Re
30. minstr 16 90522 Oberasbach Germany 1 801 233 8992 49 911 955 159 O Europe 1 800 330 0891 North Amenca 49 911 955 159 40 Fax 41 801 233 8995 fax support listentech de www listentech de support listentech com www listentech com E 2 52 Optional Accessones Earphone Options LA 161 LA 164 Single Ear Bud LA 162 Ear Speaker Stereo Ear Buds LA 165 LA 170 Stereo Headphones LA 166 Behind the Head Neck Loop Stereo Headphones Connector Options LA 265 LA 266 Consumer Professional Camcorder Cable Camcorder Cable LA 275 Sacrificial Cable 53 3 54 Notes Notes 55 li amp www listentech com Listen Technologies Corporation 14912 Hentagecrest Wa y Bluffd a le Utah 84065 4818 U S A 1 801 233 8992 1 800 330 0891 North America 1 801 233 8995 fax www listentech com O 2008 Listen Technologies Cormoration All Rights Reserved 081208
31. more information on SQ e SQ Select Switch Battery Select Switch sei et SEEN O BATTERY A WARNING y JE E Place Battenes in Unit Place two AA batteries in the compartment making note of the battery polarity shown in the battery compartment and again venfying that the BATTERY SELECT switch isin the correct position forthe battenes you are using ALK should be selected for all battery types other than NiMH NOTE Listen provides industial strength AA alkaline batteries part number LA 361 and high performance AA Nickel Metal Hydride battenes part number LA 362 These may be purchased from your Listen dealer 23 LR 400 Setup Instructions 6 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 Turn the Unit On Receivers are tumed on by rotating the volume dial counterclockwise The red LED on top of the unit should activate and the LCD display should illuminate If they do not make sure you have installed the batteries correctly and that you are using fully charged batteries Select Channel s See page 44 for complete channel selection information Set Squelch See page 29 for squelch and programming information Red LED will illuminate when e Tum volume knob counterc l
32. ne The squelch on your receiver can be adjusted so that it will mute the audio on different RF signal strengths This is useful as follows e To ensure that users don t hear transmissions from other transmitters set the squelch setting to the highest level that doesn t squelch the receiver e f the receiver is going to be close to the transmitter i e in a classroom setting the squelch setting high so that when the transmitter istumed off it immediately squelches and ignores transmitters in other rooms e If you are in an area that hasa lot of inference you may want to set the squelch setting to a high setting to ensure the interference isnot picked by the receiver e 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 CAUTION When setting the squelch level low the reliability of squelch function is compnsed This will cause radio noise to be heard in the earphone and there is a possibility of hearing damage Squelc h Programming Instructions Squelch Programming To enter Squelch programming mode e the unit off e Pressand hold the seek button while still holding seek tum the ON OFF dial to tum the unit on e Release the seek button when the Listen name disappears and a two digit display is seen To adjust the Squelch level e Use the Channel UP and DOWN buttons to raise or lower the squelch sensitivity settings e lowernumbers mean that a less powe
33. nnels to find the clearest channel by pressing SEEK using another brand of transmitter how do tell which channel to use Referto Listen s Frequency Compatibility Tables pages 47 48 Either adjust the transmitter or the receiverto a common channel There is not sufficient range Make sure you are located asclose as possible to the antenna of the transmitter Iry to place the antenna as high as possible and free from obstacles You can also checkthe squelch setting perhaps it istoo sensitive To change this setting refer page 20 LR 500 orto page 43 LR 400 3 5 TO Troubleshooting Troubleshooting Users keep changing channels You can prevent users from changing channels by locking in the channel selection This is done by pressing and holding the SEEK button for 5 seconds When the channel is locked the padlock icon will appear on the LR 400 and LR 500 displays On the LR 300 the LED will flash when the channel is locked and seek is pressed In addition you can lock the access doors to the units cannot change channels when pressing the UP and DOWN buttons or the SEEK button The unit is locked Press the SEEK button for 5 secondsto unlock When I change channels only certain channels are accessible The unit has been programmed to tune to only certain channels LR 500 only You can change these channel lock out selections by re programming the unit see page 13 My battenes are not charging Make sure
34. oc kwise to tum on Earphone Headsetjack e LCD display will activate when on 26 LR 400 Operation Instructions Make Sure the Unit is On Rotate the volume knob counterclockwise with an earphone orheadset connected to the unit Listen receivers use the cable of the earphone or headset asa receiving antenna Be careful when tuming the unit on if you tum the knob too far you might get too much volume in your earphone Select a Channel Select the channel to match the transmission channel by pressing the UP and DOWN buttons on the receiver Listen recommends the use of wide band channels At 72 MHz 72 MHz receivers operate on 17 wide band channels and 40 band channels Channels represented by letters on the display 16 A are wideband channels channels represented by numbers are narowband channels At 216 MHz 216 MHz receivers operate on 19 wide band channels and 38 band channels Channel numbers starting with a 2 are wide band channels beginning with a 1 or 3 are narow band channels Referto the Frequency Compatibility Tables pages 47 48 for specific frequencies and compatibility with other ma nufa cturers Test the audio If a transmitter is broadcasting on that channel you will be able to hearthe audio If the signal is too weak the audio will be muted squelched Find an audio transmission using SEEK Another way to find a channel on the LR 400 is to us
35. ologies Corporation technical support for assistance Open the front access door If locked use a pocketknife or small screwdriverto unlock the doorlocks on both sides of the unit To unlock the door rotate the lock 1 4 tum counterclockwise the two tabs with yourthumb and index finger and pull the door downward Do NOT place battenes in the unit yet lt Select Battery Type You have two choices NIMH and Alkaline The unit is shipped with the switch Unlocked Locked in the Alkaline position Use a pen or small screwdnver to select the battery type CAUTION if you are using any battery type other than rechargeable Nickel Metal Hydnde batteries make sure the BATTERY selection switch is in the alkaline position WARNING Do not place the BATTERY switch in the NiMH position if you are not using Nickel Metal Hydride Batteries The NiMH position will attempt to charge any batteries in the unit even if they are not the proper type Charging non Nickel Metal Hydride NiMH batteries will result in physical harm destruction of property and or fire Set SQ switch The SQ switch is inside the battery compartment next to the Battery Select switch The unit is shipped with SQ in the ON position To tum it off use a small screwdriveror pen to slide the switch to the OFF position to the nght See page 45 for
36. on of working with Listen wasrated 4 8 out of 5 Please continue with your excellent attitude toward customer satisfaction You guysare great I ve neverhad such good service from any company Keep up the good work You stand behind your product wonderfully Assistive Listening Language Interpretation Soundfield TourGroup Conferencing Receivers Table of Contents LR 500 Manual LR 500 Table of Contents LR 400 Manual LR 400 Table of Contents LR 300 Manual LR 300 Table of Contents y 9 0 8 A 8 Supplementary Information Channel Selection Listen SQ RF Reception Maximization Strategies 72 MHz Frequency Compatibility Table 216 MHz Frequency Compatibility Table Troubleshooting Compliance Notice FCC Statement Warranty Contacting Listen Optional Accessories uoneuuojul Listen User s Manual www listentech com Dit AT LR 500 Portable Programmable Display FM Receiver niss a single sound LR 500 Table of Contents Package Contents Architectural Specifications Specifications Quick Reference Setup Instructions Operation Instructions Programming Instructions Squelch Information Squelch Programming Charging Battenes Wall Transformer Operation LR 500 Package Contents LR 500 Contents e LR 500 Portable Programmable Disolay FM Receiver 72 MHz 216 MHz Listen Part Number 1 500 072 72 MHz e R 500 216 216 MHz
37. on the top of the unit to adjust the volume to a comfortable level Volume Control Dial To Lock into Only One Channel Press and hold the SEEK button for 5 secondsto lock a receiver onto the curently tuned channel Press and hold the button again to unlock When locked the LED on top of the unit Will flash when you pressthe SEEK button IMPORTANT Because the LR 300 has no LCD display it is important to recognize when the unit is locked on a channel If the unit sounds distorted or there is no audio heard and pressing the seek button does not conect the problem the unit is probably locked on the wrong channel Press and hold the seek button for 5 seconds to unlock If locked LED flasheson all portable receivers when SEEK button is pressed 41 LR 300 Charging Battenes The LR 300 and all Listen receivers are unique because they have SmartCharge chargers built in When any of these units are connected to an LA 202 wall transformer or dropped into a Listen charging case NiMH batteries will be charged To charge the batteries using the LA 202 wall transformer plug the transformer into the jack marked PWR CHG on the side of the unit The unit can be operated while the batteries are charging Mall the battenes using a charger ME the unit into a slot in the chargerand connect the chargerto power Make sure the unit is fully seated in its slot SmartC harge usesa pulse charging
38. ontrols Volume SEEK Channel SEEK is electronically lockable Channel selection can be locked by holding the SEEK button for 5 seconds Red illuminates when unit is on Flashes when batteries are low Flashes when charg Indicators LED ing Flashes when locked and user attempts to seek to another channel Battery Type Two AA batteries alkaline or NiMH Battery Life Listen batteries 30 hours alkaline LA 361 15 hours NiMH rechargeable LA 362 Pier Battery Charging NiMH only Fully automatic 14 hours 2 3 mm OD by 0 7 mm ID barrel type connector 7 5 VDC center positive lt 250mA Drop in contact points for use with Listen charging cases UL Listed Dimensions Wx Dx H 3 0 1 0 4 25 in 7 6 2 5 x 13 cm Unit Weight 3 9 oz 1118 Physical Power Supply Connector Unit Weight with batteries 5 8 oz 164 4 g Shipping Weight 1 0 lbs 453 6 kg Manually lockable SEEK behind the door 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 37 LR 300 Quick Reference Power Charging Porte Front Door Lock e 38 e 3 5 mm Output ack Connect a Listen earphone s here e LED When lit indicates unit has power When batteries are low orcharging the LED flashes eOn Off and Volume Control Dial fin momentarily press channel EK function hold 2 gk for 4 seconds
39. res not available in the other receivers you may lock out unwanted channels and you can adjust the squelch in the unit Locking Out Unwanted Channels Forapplications where users are required to select a channel such aslanguage interpretation or classrooms and you don t want them to have to go through all 57 available channels to find the appropriate channel you can lock out all channels except the ones you are using in your facility 7 UP and DOWN buttons front of LR 500 Enter the PROGRAM mode Press the UP and DOWN buttons simultaneously for 5 seconds until the PGM symbol appears in the display Use the UP and DOWN keys to select channels As channels are displayed on the unit those channels that are locked out from user access will be indicated by the L O Locked Out symbol When a channel is locked out the receiver will skip over that channel when a user is tuning the receiver Press the SEEK button to toggle channels between locked out and non locked out modes Exiting PROGRAM mode To exit the PROGRAM mode let the receiver sit idle don t press any buttons for 5 seconds The receiver will automatically retum to normal operation If you haven t finished programming the unit and it automatically exits press and hold the UP amp DOWN buttons simultaneously for 5 secondsto re enterthe PROGRAM mode 13 14 LR 500 Squelch Squelch The purpose of squelch isto mute the audio output of your receiver when th
40. rful and possibly noisy signal will be heard but you can have a longerrange e Higher numbers mean that a more powerful signal with no noise will be heard but you may have a shorter range Once the desired squelch setting is found press seek to exit the squelch programming mode Squelch setting 00 is no squelch this effectively disables Squelching capabilities of the receiver Squelch setting 20 is maximum squelch sensitivity you must have a very strong and stable RF Signal forthe unit to not engage the squelch feature Adjusting the squelch setting will keep your LR 500 receiver from picking up noise when the transmitter is not transmitting or when you lose the signal by being out of range or if encountering interference 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 litte radio noise is heard during the squelch function The Listen SQ feature is not squelch please referto page 45 for information on Listen SQ 29 LR 400 Charging Battenes The LR 400 and all Listen receivers are unique because they have SmartCharge chargers built in When any of these units are connected to an LA 202 wall transformer or dropped into a Listen charging case NiMH batteries will be charged To charge the batteries using the LA 202 wall transformer plug the transformer into the jack marked PWR CHG on
41. rger The charger providesa maintenance charge that keepsthe 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 high performance constant current NiMH Nickel Metal Hydnde battenes These may be purchased from your Listen dealer ask for part number LA 362 30 LR 400 Wall Transformer Operation The LR 400 will operate normally when connected to a wall transformer Use Listen part number LA 202 available from any Listen dealer Connect the wall transformer to the jack on the side of the LR 400 marked PWR CHG and plug the wall transformer into a grounded AC outlet You do not need to have battenes installed in the LR 400 to operate it with a wall transformer NOTE If battenes are in the unit ensure that the battery selection switch is set properly as shown on page 25 Please review the information on page 30 for important information regarding battery type and charging The LA 202 wall transformer plugs into the side of your portable transmitter or receiver 31 Listen User s Manual www listentech LR 300 Portable Digital FM Receiver iss a single sound LR 300 Table of Contents Package Contents Architectural Specifications Specifications Quick Reference Setup Instructions Operation Instructions Charging Battenes Wall Transformer Operation LR 300 Package Contents LR 400
42. s too weak the audio will be muted squelched Find an audio transmission using SEEK Another way to find a channel on the LR 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 fora 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 Adjust the volume control Use the control dial on the top of the unit to adjust the volume to a comfortable level Volume Control Dial 11 12 LR 500 Operation Instructions To Lock into Only One Channel Press and hold the SEEK button for 5 seconds to lock a receiver onto the currently tuned channel Press and hold the button again to unlock When locked the LED on top of the unit will flash when you pressthe SEEK button Is the Channel Locked on My Receiver On the LR 500 when the channel is locked the padlock icon will appear on the display If the unit is locked the red LED on top of the unit will flash when you press the SEEK button If locked LED flashes on all portable receivers when SEEK button is pressed Padlock appears when locked LR 500 Programming Instructions The LR 500 Displa y Receiver has some special featu
43. sintended 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 wananty of merchantability or fitness of use of such equipment including without limitation any warranty that the use of such equipment for any purpose will comply with applicable lawsand regulations The termsof the warranty are govemed by the lawsof 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 repairorreplace transmitters and receivers with a new unit ora unit of simila r type and condition Product that is not covered under warranty shall be repaired orreplaced with a unit of similartype and condition based on a flat fee Contact Listen for details This limited warranty prices and 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 retuming Listen products If products were damaged in shipment please contactthe carrier then contact Listen for replacement orrepair requirements payable by the camer Listen s corporate headquartersare located in Bluffdale Utah U S A and are open Monday through Frida y 8am to 5pm Mountain Time 14912 Heritagecrest Way Listen Technologies GmbH Bluffdale Utah 84065 4818 J as
44. the battery switch is in the NiMH setting and that you are using NiMH Nickel Metal Hydnde battenes Make sure you are using only a Listen supplied charging unit or transformer Never try to charge alkaline or NICAD batteries wantto run the unit from a wall transformer Simply plug a Listen approved transformer LA 202 to the CHG PWR connector on the side of the unit Batteries do not need to be installed when operating the unit with a wall transformer however if you have NiMH batteries installed and the BATTERY select switch is set to NiMH the batteries will charge while the unit is being used It s confusing for users to have 57 choices when switching between channels Use the programming feature only available in the LR 500 to limit the number of channels accessible by users E 2 50 Compliance Notice and FCC Statement Compliance Notice This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 These devices may not cause harmful interference and 2 these devices must accept any interference received including interference that may cause undesirable operation FCC Statement This equipment has been tested and found to comply with the limits fora class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can
45. tion To tum it off use a small screwdriveror pen to slide the switch to the OFF position to the nght See page 45 for more information on SQ e SQ Select Switch Battery Select Switch sei et SEEN O BATTERY A WARNING y JE E Place Battenes in Unit Place two AA batteries in the compartment making note of the battery polarity shown in the battery compartment and again venfying that the BATTERY SELECT switch isin the correct position forthe battenes you are using ALK should be selected for all battery types other than NiMH NOTE Listen provides industial strength AA alkaline batteries part number LA 361 and high performance AA Nickel Metal Hydride battenes part number LA 362 These may be purchased from your Listen dealer 10 LR 500 Setup Instructions 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 Turn the Unit On Receivers are tumed on by rotating the volume dial counterclockwise The red LED on top of the unit should activate and the LCD display should illuminate If they do not make sure you have installed the batteries correctly and that you are using fully charged batteries Select Channel s See page 44 for complete channel selection information Set Squelch See pag
46. tructions between the transmitter and receivers Minimize the distance between the transmitter and receivers Move transmitter and receivers away from metal objects Place the transmitting antenna ashigh as possible on stationary transmitters Orient both transmitting and receiving antennas vertically For216 MHz stationary LT 800 transmitter only consder using a gain antenna such asa Yagitype antenna orthe LA 107 ground plane antenna On portable transmitters and receivers the cable from the microphone or headset is the antenna ensure that the cable is not coiled orlaying horizontal CAUTION When installing remote antennas ensure the antenna is clear of power lines NOTE If the RF signal to the 216 MHz models is too high the audio will be distorted This may happen if you are within 40 feet 12m of the LT 800 216 transmitter or within 5 feet 1 5 m of the LT 700 216 tansmitter Coaxial cable connectors and optional antenna mounting kits are available from Listen Visit www listentec h com or a sk your dealer for details 72 MHz Compatbility Chart Frequency Phonak Phonic MHz Listen Microfield Ear Comtek Williams Gentner Telex lt lt 72 0250 720500 72 0750 72 1000 72 1250 721500 72 1750 4 4 72 2000 72 2250 722500 722750 6 723000 B B 72 3250 723500 72 3750 8 88 72 4000 724250 9 NO 724500 72 4750 72 5000 72 5250 72
47. ystems 2MHzin a secondary frequency band This means that other transmitters are licensed to use these frequencies Thus you may experience interference from paging transmitters and othertype transmissions You will need to find a clear channel by listening to all the wide band channels i 216 MHz primary frequency band and no other types of transmissions are authorized to use it Thus you will find the highest probability of clear channels in this band However you may experience intermodulation of the TV Channel 13 aural camer if there isa channel 13 transmitter in your area and you are close to the transmitter If you cannot find a clear channel in 216 MHz band due to channel 13 it is recommended that you switch to a 72 MHz system NOTE The LR 300 072 can only be used with the 17 wide band 72 MHz channels if you are using the LR 300 choose only lettered wide band frequencies on your tansmitter E 44 Listen SQ We are accustomed to listening to low noise high fidelity audio delivered via CD DVD etc FM radio systems such as those made by Listen have more inherent noise compared to most sound systems To reduce noise of our systems Listen now offers a noise reduction technology called Listen SQ Both the transmitter and receiver must have SQ on to achieve the desired results SQ is now available on new Listen systems including the system you received in this shipment If you are planning to us
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