Listen Technologies LR-100 User's Manual
Contents
1. User s Manual LR 100 Stationary Receiver Power Amplifier Don t miss a single sound i ten www Listen Tech com Listen Technologies Corporation 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Telephone 1 801 233 8992 Toll Free USA 1 800 330 0891 Fax 1 801 233 8995 E mail info listentech com V 030825 Listen and the Listen logo are registered trademarks of Listen Technologies Corporation Document LM 100 Copyright 2003 Listen Technologies Corporation All Rights Reserved Listen www ListenTech com For a complete description of connectors and controls please see page 4 of this manual Listen Architectural Specifications The FM stationary receiver power amplifier receiver shall be capable of receiving on 57 wide and narrow band channels in the frequency ranges of either 72 MHz or 216 MHz The receiver shall be programmable to electronically lock out unneeded channels The receiver shall have an adjustable squelch with an LED indication The frequency response of the receiver shall be within 3dB from 50 Hz to 15 kHz at 72 MHz or within 3dB from 50 Hz to 10 kHz at 216 MHz The signal to noise ratio shall be 80dB or greater The receiver will have an integrated power amplifier capable of driving a 4 ohm speaker The receiver shall be rack mountable and shall have the capability of a remote antenna The receiver shall incorporate an LCD display that indicates channel and RF signal strengt2. Unbalanced Audio Output There are two unbalanced phono audio OUTPUT connectors The nominal OUTPUT audio level is 10dBu LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com AUXILIARY Input The LR 100 has an AUXILIARY input that allows for greater functionality of the unit for a variety of applications The AUXILIARY input consists of a balanced input combination connector female XLR and 1 4 in and two unbalanced phono connectors All of these inputs are actively mixed together Thus any combination of input sources can be used Input level is adjusted via the front panel trim pot labeled AUX LEVEL ADJUST Adjust this level to fit the needs of your installation ensuring the last red LED on the VU meter is not illuminated indicating peak audio AUXILIARY Balanced Audio Input The nominal input level for the balanced input is OdBu Female XLR in combination connector pin outs Pin 2 tip Pin 3 ring Pin 1 sleeve Shield AUXILIARY Unbalanced Audio Input The nominal input level for the two unbalanced inputs is 10dBu Female XLR in combination connector pin outs Pin 2 tip Pin 1 and 3 ring sleeve Speaker Connection The LR 100 contains a 44 watt 31 watt RMS 4 Ohm power ampli
3. 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 tear on the prod uct or any other physical damage unless the damage was the result of a manufacturing defect Listen is not 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 limita tion any warranty that the use of such equipment for any purpose will comply with appli cable laws and regulations The terms of the warranty are governed by the laws of the state of Utah Listen will only accept returned products with prepaid shipping and with a return authoriza tion number To receive a return authorization number call 1 800 330 0891 or 1 801 233 8992 Listen will refund the purchase price of the product to the original purchaser within the first ninety days after purchase if the product does not perform better than a similar competitive product subject to an annual amount to any one original pur chaser not to exceed 1 000 and subject to the conditions of this limited warranty This is called our Whatever it takes Performance Guarantee To receive a refund call Listen for a return authorization number Refunds wi
4. with other brands and should be disabled in this case LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com FCC Statement This equipment has been tested and found to comply with the limits for a class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reason able protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e 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 connected e Consult the dealer or an experienced radio TV technician for help This equipment has been certified to comply wi
5. 250 75 275 38 216 1250 2C 216 6250 2M 72 275 6 75 300 J 216 1375 3C 216 6375 3M 72 300 B 75 325 39 216 1500 216 6500 72 325 7 75 350 216 1625 1D 216 6625 1N 72 350 75 375 40 216 1750 2D 216 6750 2N 72 375 8 75 400 R 216 1875 3D 216 6875 3N 72 400 N 75 425 21 216 2000 216 7000 72 425 9 75 450 216 2125 1E 216 7125 1P 72 450 75 475 22 216 2250 2E 216 7250 2P 72 475 10 75 500 F 216 2375 3E 216 7375 3P 72 500 C 75 525 23 216 2500 216 7500 72 525 11 75 550 216 2625 1F 216 7625 1R 72 550 75 575 24 216 2750 2F 216 7750 2R 72 575 12 75 600 S 216 2875 3F 216 7875 3R 72 600 O 75 625 25 216 3000 216 8000 72 625 13 75 650 216 3125 1G 216 8125 1S 72 650 75 675 26 216 3250 2G 216 8250 25 72 675 14 75 700 G 216 3375 3G 216 8375 3S 72 700 D 75 725 27 216 3500 216 8500 72 725 15 75 750 216 3625 1H 216 8625 1T 72 750 75 775 28 216 3750 2H 216 8750 2T 72 775 16 75 800 T 216 3875 3H 216 8875 3T 72 800 P 75 825 29 216 4000 216 9000 72 825 17 75 850 216 4125 1J 216 9125 1U 72 850 75 875 30 216 4250 2J 216 9250 2U 72 875 18 75 900 H 216 4375 3J 216 9375 3U 72 900 E 75 925 31 216 4500 216 9500 72 925 19 75 950 216 4625 216 9625 1V 72 950 75 975 32 216 4750 216 9750 2V 72 975 20 216 4875 216 9875 3V 216 5000 217 0000 Note If you plan to use your LR 100 with another manufacturer s transmitter please consult our frequency compatibility chart on the Listen website for assistance in selecting the correct channel for operation Please note that ListenSO will not work
6. 400 Mute Squelch Output Level page 7 o Power Recone A will not be displayed to the user AUXILIARY audio level adjust SQUELCH adjust so that PGM indicates the unit is in the LOCK When the padlock icon is visible ment when the transmitter is off the program mode that allows you to the unit is locked and you cannot change Squelch LED is illuminated lock out channels that are not the channel Press and hold SEEK for 5 When squelched receive audio used seconds to lock or unlock is muted LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Li ten www ListenTech com LR 100 Rear Panel Connections and Controls SPEAKER CONNECTION Connect 4 ohm or greater speaker here BALANCED OUTPUT CONTROL Male XLR 0 or 40 dBu nominal Remote control of UP DOWN and MUTE functions All functions are momentary closures ANTENNA CONNECTION to common Attach supplied 90 degree helical antenna or optional remote antenna here Uses standard 50 UNBALANCED AUXILIARY ohm BNC connector UNBALANCED OUTPUT INPUT phono 10dBu nominal Phono dna nominal Pra N se Audio Ut gt engann a y a apaa MODEL LR 100 072 MIC LINE LEVEL SWITCH Reduces the balanced OUTPUT POWER OPTION AL 12V POWER audio gain by 40dB in
7. Mic mode Cannes provided Connect optional battery or 12VDC source here Battery can power supply here be recharged see page 9 BALANCED AUXILIARY INPUT Combination female XLR 1 4 in connector O0dBu nominal SPEAKER SELECTION SWITCH Selects audio being routed to the AUDIO OUTPUT SELECTION speaker amplifier to either the For RECEIVE audio only select RX ONLY OUTPUT or AUXILIARY audio For RECEIVE audio mixed with AUXILIARY audio select RX AUX For RECEIVE audio when not squelched and AUXIL IARY audio when squelched select RX or AUX LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com System Block Diagram External Battery Remote Control Speaker 12 VDC 3 4 5 6 7 8 1 2 Detachable O O 92000 O O Terminal Block Power External Power Onori 115VAC Supply o o o LA 201 iy Power Supply h CPU Module ux Q Listen LCD Display O Remote 35MM Headphone Antenna Flexible helical antenna provided sa On Off internal rors Output Audio Processing O O Balanced BNC Module Line 0 dBu O RF Receiver Board Q Output O axorai Fiano Unbalanced O 10 dBu O O p Output Select Electronic gt gt lt lt lt Squelch V 5 Sensitivity XLR 1 4 Combo A
8. are shorted to each other or if they are shorted to the chassis for over 15 seconds In this condition the LR 100 will no longer function normally If the LR 100 stops functioning nor mally do the following 1 Turn the unit off and unplug it from power If you are operating the LR 100 with an external 12VDC source such as a battery disconnect the power source from the unit 2 Remove the short to the speaker terminals 3 Wait 30 seconds or longer 4 Plug the unit back in and turn the power on The LR 100 should now function normally If the unit is still not functioning normally contact Listen Support see page 21 LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Troubleshooting The unit does not power up or it has stopped operating i Ensure the power supply is connected properly ii The speaker terminals may be shorted see page 19 The audio is muted occasionally i Check to see if the unit is squelching indicated by the squelch LED In this case either improve the RF signal path or adjust the squelch setting for less squelch sensitivity l hear noise coming from the receiver i You may have inadequate RF signal strength Adjust the positioning of the anten nas Make the transmitter is o
9. iv The front panel headphone jack is in parallel with the speaker level Connect any mono or stereo headphone to this 3 5mm jack Adjust level with the SPEAKER vol ume knob Installation Antenna A properly installed antenna is critical to the operation of the LR 100 Without a strong and consistent RF signal from the transmitter the LR 100 will not meet the needs of your installa tion You can use the RF POWER indication on the LCD to provide a relative RF signal strength You should see four or more dots displayed on the LCD for best results Using the supplied helical antenna Connect the antenna to the rear BNC connector and orient the antenna vertically If recep tion is from the transmitter is not adequate consider using a remote antenna see below or place the LR 100 at an improved location to improve the signal strength See Strategies for Maximizing RF Reception with the LR 100 on page 7 for more information Using a remote antenna For better reception in longer broadcast range applications you should use a remote antenna A remote antenna will allow you to get the antenna higher in altitude and in a position that is clear of obstructions Please refer to the specific antennas instructions for installation Also refer to Strategies for Maximizing RF Reception with the LR 100 on page 7 for additional information CAUTION When installing antennas ensure the antenna is clear of power lines NOTES If the RF sign
10. routed to the OUTPUT RX AUX In this position both the RECEIVE and AUXILIARY audio are mixed and routed to the OUTPUT RX or AUX In this position the OUTPUT audio is either RECEIVE or AUXIL IARY audio When the RECEIVE audio is squelched indicated by the illumination of the SQUELCH LED on the front panel AUXILIARY audio is routed to the OUTPUT When RECEIVE audio is not squelched RECEIVE audio only is routed to the OUTPUT LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com What is Squelch See page 7 Balanced Audio Output When connecting to the XLR balanced OUTPUT use the pin out show below If the output is unbalanced either use the unbalanced phono connectors or wire the balanced XLR output as shown below with pins 3 and 1 wired together The OUTPUT audio has a nominal output level of OdBu i XLR pin out diagram for a balanced connection Pin 2 Pin 3 Pin 1 Shield 2 XLR pin out diagram for a unbalanced connection 5 Pin 2 a Pin 1 and 3 LINE MIC Switch This switch reduces the OUTPUT level of the balanced OUTPUT audio only It does not affect the OUTPUT level of the unbalanced audio The OUTPUT audio is reduced by 40dB to microphone level when this switch is selected to MIC
11. Amplifier Li ten www ListenTech com LR 100 Front Panel Connections and Controls MUTE SEEK BUTTON When illuminated the OUTPUT Press to find the next strongest audio is muted MUTE is signal Also used to lock unlock activated and deactivated by a SQUELCH INDICATOR channel selection press and hold momentary closure to ground on When adjusted properly this for 5 seconds Lock status is the rear detachable terminal block indicator is illuminated when the indicated by padlock symbol in the VU METER see next page transmitter is off LCD display Set Receive and Auxiliary levels so that the red LED at right does not illuminate UP BUTTON Selects the next channel up Headphone POWER SWITCH HEADPHONE If operated on battery switch is DOWN BUTTON Connect a mono or stereo inoperative Selects the next channel down headphone here 3 5 mm plug mini ACCESS PANEL Remove to make set up adjust ments LCD PANEL Indicates signal strength channel SPEAKER CONTROL indication program mode and Adjusts the volume of your locked mode see closeup below loudspeaker connected to the LR 100 and or the headphone connected to the unit BEHIND ACCESS PANEL LCD PANEL DETAILS RF Signal Strength Channel Indication RECEIVE audio level SQ to cab sana di to the ON position adjustment for more information on Listen SQ see L O When in the programming mode this symbol indicates the channel is locked out and
12. C battery supply the POWER switch is by passed and the unit is always on You can optionally charge batteries by also supplying power to unit with the batteries con nected In this case the batteries are trickled charged at a rate of 18 36 mA You should only use rechargeable type batteries CAUTION Attempting to charge non rechargeable batteries may result in explosion and or fire LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Installation Detachable Terminal Block Detachable Terminal Block Wiring Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Speaker Speaker Ground for Battery or Power Source connection 12VDC Battery or Power Source UP remote control function DOWN remote control function MUTE remote control function Common for remote control function Installation Audio Connections OUTPUT Audio The OUTPUT audio section is composed of an OUTPUT audio selection switch a male XLR balanced audio OUTPUT connector and two phono unbalanced audio OUTPUT connectors OUTPUT Audio Selection Switch This switch selects what audio is routed to the OUTPUT audio connectors The switch has three positions 1 Le 3 RX ONLY In this position only RECEIVE audio is
13. HOLDING the SEEK button for five seconds In this case the padlock symbol on the LCD will be displayed Repeat this process to unlock b NOTE It is highly recommended to lock the channel after installation to prevent accidental channel selection In some cases you may choose to give users the ability to select multiple channels For ex ample you re are using the LR 100 for language interpretation In this example channels A E and I are three different languages You can use the LR 100 programming feature to lock out all but the three channels used in this example By pressing the UP or DOWN button the user can select between the three channels To program the LR 100 i Simultaneously press and hold the UP and DOWN button You will notice the PGM indicator on the LCD indicating you are in the programming mode the unit will go out of the programming mode if you don t press a key for 10 seconds ii Now use the UP and DOWN buttons to select the channels you want to lock out iii Press the SEEK button to lock out a channel lock out means the channel will not be displayed to the user You will notice that the L O symbol is displayed on the LCD indicating the channel is locked To reverse the lock out process simply press the SEEK button on locked out channels iv When completed programming don t press any key for 10 seconds and the unit will exit the programming mode See What is Squelch on page 7 The squelch adjustme
14. al to the 216MHz model is too high the audio will be distorted This may happen if the LR 100 is within 40 feet of the LT 800 216 transmitter Consider reducing the output power of the transmitter or optionally removing the antenna on the LR 100 there is sufficient internal antenna inside the LR 100 to receive an adequate signal from the trans mitter LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Installation Remote Control The LR 100 can be programmed see Set up Programming page 17 so only used channels can be selected For example You are broadcasting material on channels A E and F 72MHz You would program the LR 100 so that it could only receive these channels Thus depression of the front panel UP DOWN and SEEK would only allow you to select one of these three channels The UP and DOWN functions can be remotely controlled with a momentary clo sure to common see Set up Diagram above In addition the MUTE function can be re motely controlled Please note that the MUTE function cannot be controlled on the unit and must be remotely controlled All control is obtained with a momentary closure to ground Remote control pin outs a UP Channel Selection pin 5 b DOWN Channel Selection pin 6 MUTE f
15. ce for your opera tion and set your transmitter to this channel If you are using multiple channels at the facility follow this process als Same Space If your transmitters are located in the same space i e an equipment rack you can only use six channels at 72MHz or three at 216MHz With all of the transmitters off listen for interference on the wide band channels listed on page 22 in the channel selection guide via the headphone jack Do not attempt to use channels that have noticeable interference Now choose the channels with the widest channel spacing It is recommended that adjacent channels in a facility be spaced at least 300KHz If there is no interference the following channels are recommended A C E I J and H for 72MHz and channels 2A 2K and 2V at 216MHz b Distributed Spacing If you are using transmitters that are spread out over space you can have more simultaneous broadcast channels You can use adjacent channels see LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com selection chart on page 22 as long as the adjacent channel transmitter is at least 50 further away from an LR 100 than its own transmitter Example The transmitter for the LR 100 on channel E is 100 feet from the LR 100 The adjace
16. ed 60dB 72 MHz 50dB 216 MHz with SQ disabled 50 to 15 kHz 3dB 10 kHz at 216 MHz lt 2 at 80 deviation 25 Hz to 20 kHz 3dB lt 2 distortion gt 80dB SNR Male XLR OdBu nominal Phono 2 10dBu nominal Female XLR 1 4 combo connector adjustable input level OdBu nominal Phono 2 adjustable input level 10dBu nominal 44 Watt peak 31 Watt RMS 4 ohms Detachable terminal block connector Momentary closure to ground for UP DOWN and MUTE functions Mute function is indicated on front panel Adjustable with front panel control LED indicator Front panel can be locked by holding down the SEEK button for five seconds receive channels can be programmed so user can only access certain channels Standard BNC flexible helical included 9 in 23 cm for 72 MHz 5 5 in 14 cm for 216 MHz Optional remote antennas available see antenna selection guide 8 0 in 20 3 cm W x 8 0 in 20 3 cm D x 1 75 in 4 45 cm H Provided Listen part number LA 201 same as LT 800 power supply Input 120 VAC 60 Hz 19 Watts maximum coninuous Output 18 VAC 1000 mA Connector 02 in 5 0 mm OD 01 in 2 5 mm ID barrel type 12 VDC Wireless Transmission System Specifications End to end LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power
17. enna in a different location than on the top of the unit you must use cable and connectors rated at 50 ohms Although cable used for cable TV installa tions looks similar to this cable it won t work with your Listen system If you need to run cable over a greater length than 50 feet for 216 MHz applications or greater than 100 feet for 72 MHz applications we recommend that you use RG 8 cable rather than RG 58 It is a lower loss cable meaning that more of your signal will reach the antenna LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Long cable runs can result in signal degradation due to loss characteristics of the cable At 72 MHz there is a loss of 2dB per 100 feet of cable and at 216 MHz there is a loss of 5 dB per 100 feet of cable A 3dB loss means half of your power has been lost However it is better to suffer coaxial power loss than to try to shoot your signal through obstacles Obstacles especially metal can create drop outs or reflections of your signal that will result in poor listening conditions Strategies for Maximizing RF Reception with the LR 100 For proper and dependable operation the LR 100 should receive a strong and consistent signal from the originating transmitter The following s
18. fier i The Speaker Selection switch determines what audio is directed to the power ampli fier With the switch in the OUTPUT position the OUTPUT audio same audio that is on the OUTPUT audio connectors is directed to the power amplifier With the switch in the AUX position AUXILIARY input audio only is directed to the power amp This allows you to use the power amplifier separate of the RECEIVER audio if desired Note When the speaker switch is in the OUTPUT position and the MUTE control is enabled indicated by the illumination of MUTE LED the speaker output is also muted ii Connection to the speaker is achieved through pins 1 and 2 on the detachable termi nal block Strip the speaker wires rotate the screws on the terminal block counter clockwise insert the wires and then tighten the screw clockwise until the wire is secure in the connector block You may connect any parallel series combination of speakers that produces an impedance of 4 ohms or greater LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Example If you have two 8 ohm speakers you can connect these in parallel to pro duce a 4 ohm load to the power amp iii The SPEAKER level control on the front panel adjusts the level of the speaker
19. h The Listen LR 100 is specified Contents of Package Listen Part Number LR 100 072 72 MHz or LR 100 072 for 72 MHz LR 100 216 216MHz LR 100 216 for 216 MHz Helical Antenna LA 123 for 72Mhz LA 124 for 216Mhz Optional Accessories Power Supply LA 201 Detachable Terminal Block installed on the unit LA 326 Rack Mounting Kit LA 327 L Bracket Mounting Kit LA 123 90 Degree Helical Antenna 72 MHz One included LA 124 90 Degree Helical Antenna 216 MHz One included LA 122 Universal Antenna Kit Use With LA 315 Portable Antenna Stand for LA 122 Universal Antenna Kit LA 127 RG58 BNC Cable Connector User s Manual LT 800 072 Stationary Transmitter LA 128 RG8 BNC Cable Connector LT 800 216 Stationary Transmitter LA 112 RG58 Coaxial Cable LT 700 072 Portable Transmitter LA 113 RG8 Low Loss Coaxial Cable 1700 216 Portable Transmitter LA 114 Coaxial Connector Installation 2 connectors LA 316 Expansion Speaker Thank you for purchasing this Listen product If you have any questions or would like to offer suggestions on future Listen products please contact us at the address shown below LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Table of Contents Specifications www ListenTech com Architectural Sp c
20. hear AUX audio on the OUTPUT i Move the OUTPUT audio selection switch to either RX AUX or RX or AUX depending on your application cannot change channels i The unit is locked on channel Press and hold the SEEK button for five seconds The power switch does not work i This is normal when using the 12VDC power on the rear terminal block If you are still having problems after checking the above items call Listen for help We are available from 8 AM to 5 PM Mountain time Monday through Friday at 1 800 330 0881 or 801 233 8992 or you can e mail us at support listentech com Our full contact information is available on page 1 of this manual LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Channel Selection Chart 72 MHz 216 MHz Frequency MHz Channel Frequency MHz Channel Frequency MHz Channel Frequency MHz Channel 72 025 1 74 625 33 216 0125 1A 216 5125 1K 72 050 74 650 216 0250 2A 216 5250 2K 72 075 2 74 675 34 216 0375 3A 216 5375 3K 72 100 A 74 700 216 0500 216 5500 72 125 3 74 725 35 216 0625 1B 216 5625 1L 72 150 74 750 216 0750 2B 216 5750 2L 72 175 4 74 775 36 216 0875 3B 216 5875 3L 72 200 K 75 225 37 216 1000 216 6000 72 225 5 75 250 216 1125 1C 216 6125 1M 72
21. ificati ns sssssiscsisssiisisssiressrseisiererisisr serevesiiiieasest page 2 Specifi cAtigNS sasscavasuniaravasante toriese oren s eee s Koreke E Ee ESE eee Eee page 3 Front and Rear Panel Descriptions sssssesssssssssssssesessesessssssesesrsseseene page 4 System Block Diagta M sascnnsssadcaiessearsunvaneedimananivangaaiassareansehiovins page 6 Important Things to Note Before Starting sessessessssesesesrerssessesesrsee page 7 DiS Oi nireset eer erer e Eeen E N E eiiis page 9 SETUP sieri a E E ender yainenlanmeneaniiay page 15 Resetting After an Overload Condition sssssesssssssssesseressssssesesreresess page 19 Troubleshooting tessseisiesesiissesssseser cirese tiree erara eean anis Eaei page 20 Channel Selection Guide sss seseesosessssesesossesessssssosesesseseosesesssseseseess page 22 FOC Statement 5 aicissnaniGraniaienueenanainenateraauinanieoruanseet page 23 Warranty ersesssetensrier eeii rse sig EN E AE VRE KEE EEE E ETSE page 24 RF Frequency Range 72 MHz 72 025 75 950 MHz 216 MHz 216 0250 MHz 216 975 MHz Number of Channels 57 Sensitivity 6 uV typical 1 uV maximum for 12dB SINAD Signal to Noise Ratio Frequency Response Distortion Auxiliary Input to Audio Output Speaker Balanced Output Unbalanced Output Balanced Auxiliary Input Unbalanced Auxiliary Input Power Amplification Remote Channel Select Squelch Programming Antenna Physical Power Supply Optional External Battery 80dB with SQ enabl
22. ll only be given to the original purchaser of product once the product has been returned to the factory in good working order with an explana tion for the refund Return the product with a letter on the end user s letterhead stating the reason for the refund and a copy of the original invoice If the product was purchased through a dealer refunds must be processed through the original dealer In the first ninety days after purchase any defective product will be replaced with a new unit After ninety days Listen will at its own discretion either replace transmitters and receivers with a new unit or a unit of similar type and condition Product that is not covered under warranty can be replaced with a unit of similar type 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 Visit www listentech com or contact Listen at the address shown below LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com
23. n high power ii You may be experiencing interference try a different channel iii Make sure the transmitter and receiver are on the same channel The channel is often accidentally changed i Lock the unit on channel by pressing and holding the SEEK button for five seconds The padlock symbol is illuminated on the LCD There is no audio i Make sure the RECEIVE and or AUX trim adjustments are turned clockwise ii Make sure the unit is not MUTED indicated by the MUTE LED iii Make sure the unit is wired correctly iv Make sure the transmitter and receiver are on the same channel v Make sure the squelch adjustment is set correctly The audio is distorted i Make sure the transmitter and receiver are on the same channel ii Make sure that the SQ switch is ON or OFF for both the transmitter and receiver iii Make sure the audio level is not set too high iv Make sure you are not too close to the transmitter LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com The OUTPUT level is low i Make sure the MIC LINE switch is in LINE ii Adjust the RECEIVE or AUX input levels There is no audio on the speaker i Make sure the speaker selection switch is in the correct position I can t
24. nt channel transmit ter on channel D should be at least 150 feet away Notes in regard to using 72MHz and 216MHz systems i 72MHz is a secondary frequency band This means that other applications such as paging systems are licensed to use these frequencies Thus you may experience inter ference from other types of transmissions You will need to find a clear channel by listening to all the wide band channels ii 216MHz is a primary frequency band and no other types of transmissions are autho rized to use it Thus you will find the highest probability of clear channels in this band However if there is a TV Channel 13 in your area you may experience intermodulation of the TV Channel 13 aural carrier If you cannot find a clear channel in 216MHz band due to channel 13 interference it is recommended that you switch to a 72MHz system NOTE Once you have selected your transmit and receive channels it is recommended that you lock the channel so that it cannot be changed by the user To accomplish LOCK press and hold the SEEK button for five seconds Repeat to unlock Setup Adjustments To make setup adjustments remove the two hex screws that secure the front panel security cover Setup VU Meter The front panel VU meter indicates the audio level of the OUTPUT signal When making input audio level adjustments ensure that the red LED only illuminates occasionally Input Audio Levels Proper adjustment of input levels is critical to
25. nt is important to ensure the radio audio is muted when no transmit signal is present You want to set the squelch adjustment for the highest setting without squelching the incoming signal LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com To set the squelch control a Turn the transmitter OFF b Listen to the receiver audio on the speaker or headphone Turn the audio level down in the beginning Adjust the squelch adjustment clockwise until the squelch LED goes off not illumi nated You will hear radio noise now This is the audio you want to squelch mute when the transmitter is off d Now adjust the squelch setting counter clockwise until it squelches mutes This is the minimum squelch setting e Now turn the transmitter on Adjust the squelch setting counter clockwise until the unit squelches This is the maxium squelch theshold Please note that if you are close to the transmitter you may not be able to find the maxium squelch threshold due to the high RF signal of the transmitter f Set the squelch adjustment between the maximum and minimum squelch thresholds keeping the following in mind i Minimum squelch threshold By adjusting the unit near this threshold you will maximize the probabilit
26. th the limits for a class B computing device pursuant to FCC and IC Rules In order to maintain compliance with FCC and IC regula tions 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 the manufacturer could void the user s authority to operate this equipment LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www ListenTech com LR 100 Stationary Receiver Power Amplifier Listen Warranty www ListenTech com Listen Offers a Limited Lifetime Warranty Including a Performance Guarantee Listen Technologies Corporation Listen warrants its transmitters and receivers LT 700 LT 800 LR 100 LR 300 LR 400 LR 500 LR 600 etc to be free from defects in workman ship and material under normal use and conditions for the useful lifetime of the product from date of purchase All other products and accessories are warranted for ninety days from date of purchase This warranty is only available to the original end purchaser of the product and cannot be transferred Warranty is only valid if warranty card has been re turned within 90 days of purchase This warranty is void if damage occurred because of
27. the proper operation of the LR 100 a Receiver Audio Level Adjustment Under normal audio conditions adjust the re ceive audio level to meet the output level needs of your installation Ensure the red LED on the VU meter only illuminates occasionally b Auxiliary Input Level Adjustment Under normal audio conditions adjust the receive audio level to meet the output level needs of your installation Make sure that the red LED on the VU meter only illuminates occasionally LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Selecting SQ ON or OFF See What is Listen SQ on page 6 If the transmitter that is broadcasting to the LR 100 is SQ capable make sure the SQ switch for the transmitter and the LR 100 is turned ON If not the SQ switch should be turned OFE Channel Selection Programming Squelch Select the most appropriate channel by pressing the UP or DOWN button see What Channel Should I Use on page 15 You can optionally press the SEEK button and the unit will SEEK for the strongest RF signal Please note that the unit will stop on interfering signals and adja cent channels In this case redepress the SEEK button a Locking the unit on channel The unit can be locked on channel by pressing and
28. trategies should be used maximize this signal a When designing and installing your system keep in mind that the location of both the transmitting and receiving antennas is critical to maximizing signal strength b Eliminate or minimize obstructions between the transmitting antenna and the receiv ing antenna Minimize the distance between the transmitting and receiving antennas d Move transmitting and receiving antennas away from metal objects e For the LR 100 consider using a remote antenna instead of the supplied 90 degree helical antenna This will allow you to place the antenna at a location with improved line of site to the transmitting antenna You will need to be careful about the type and length of coaxial cable see the note above F Place the transmitting antenna as high as possible g Orient both transmitting and receiving antennas vertically h For 216MHz unit only consider using a gain antenna such as a Yagi type antenna CAUTION When installing antennas ensure the antenna is clear of power lines NOTES If the RF signal to the LR 100 is too high the audio will be distorted This may happen if you are within 40 feet of the LT 800 transmitter Consider reducing the output power of the transmitter or optionally removing the antenna on the LR 100 there is sufficient internal antenna inside the LR 100 to receive an adequate signal from the transmitter Coaxial cable connectors and optional antenna mounting ki
29. ts are available from Listen Visit our website for details LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen Installation Powering the Unit www ListenTech com If you are using the LR 100 s power amplifier make sure the unit is given sufficient room around the ventilation holes If you are rack mounting the LR 100 use the optional LA 326 rack mounting kit This kit allows for single and dual rack mounting and comes with a security cover For mounting on vertical or horizontal surfaces use the optional L bracket mounting kit part number LA 327 Note The LR 100 will shut down to prevent damage to the unit if the speaker terminals are shorted Please see page 19 for details AC Power Operation The unit comes with a UL listed inline power supply designed for 115 VAC 60Hz operation Do not use any other power supply Use of any non Listen supplied power supply will void the warranty Plug the power supply into the back of the unit at the connector labeled POWER Now connect the power supply to power Battery Operation To operate the unit on a battery or 12VDC power supply connect to the rear detachable terminal block as follows i Pin 3 12VDC ii Pin 4 Ground Please note that when operating on the 12VD
30. turned up high enough could damage the listen ers ears The squelch control is a threshold adjustment determining at what RF signal level the unit will squelch or mute the receiver s output audio When the squelch is set high it takes more RF signal to unsquelch the receiver For information on setting up the LR 100 s squelch please see page 17 What is ListenSQ We are accustomed to listening to low noise high fidelity audio delivered to us via compact discs and other audio mediums FM radio systems such as used in the LR 100 are inherently noisy as compared to most sound systems In order to reduce noise of the broadcast system the LR 100 uses a noise reduction technology called ListenSQ Both the transmitter and receiver must have SQ on to achieve the desired results You will notice on the front panel of the LR 100 under the security plate a switch labeled SQ ON OFF To receive the benefits of SQ turn this switch to the ON position Also make sure that the transmitter also has its SQ switch turned on If the transmitter is not capable of SQ if you are using an older version Listen transmitter or a product from a different manufacturer you should turn SQ OFF on the LR 100 Coaxial Cable The antenna for the LR 100 can be mounted directly on the unit if desired However you may find that the unit will provide better performance when the antenna is located elsewhere If you plan to mount the LR 100 s ant
31. unction pin 7 d COMMON pin 8 NOTE The MUTE function is indicated on the front panel MUTE LED If the unit loses power the unit will remember the MUTE function when power is restored LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen Setup www ListenTech com Understanding the LCD display The front panel LCD provides important information to the operation of the LR 100 RF Power Channel Channel This indicates the currently tuned channel See Which channel should I use below for more information and the Channel Selection Chart on page 22 RF Power This indicates the relative power from the transmitter You should maximize the level for best operation Which channel s should I use Your LR 100 gives you the ability to select both wideband and narrowband receiving chan nels so finding a clear reception channel should not be difficult Listen recommends the use of wideband channels channels designated with a letter on 72 MHz or starting with a 2 on 216 MHz unless you are interfacing with an existing narrowband transmission system Before turning on the system transmitter use the Seek button to find any other transmitters that might be in the area Choose a channel with the least amount of interferen
32. uxiliary Level OC Auxiliary Input Balanced O 0 dBu Phono Auxiliary Input Unbalanced Q 10dBu Before Installing Your LR 100 Please carefully compare the contents of your kit with the list found on page 2 of this manual If any items are missing or damaged please contact Listen Technologies If items were dam aged in shipment contact your carrier immediately and retain all packaging for inspection by your carrier Listen is not responsible for shipping damage Listen Technologies Corporation 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Telephone 1 801 233 8992 USA Toll Free 1 800 330 0891 Fax 1 801 233 8995 e mail info listentech com LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Important Things to Note Before Starting Your Installation What is Squelch The LR 100 is a radio receiver that receives an RF signal from either an LT 800 or LT 700 radio transmitter Many radio receivers including the LR 100 include a control called squelch that mutes the receiver s output signal when there is no received RF signal Without the squelch control a strong noise is heard at the receiver whenever it is not receiving a signal This noise can be disturbing to listeners and if sound is
33. y the unit will NOT squelch when the transmit ter is on However you also run the risk having the unit NOT squelched and resulting radio noise coming through the system when the transmitter is off You may experience unsquelching of the receiver by interference as well ii Maximum squelch threshold By adjusting the unit hear this threshold you will greatly increase the chance the unit will squelch when the transmitter is off AND you will minimize the probability that the unit will be unsquelched by interference However you are also increasing the chances that the signal coming from the transmitter will be squelched Thus if the RF signal from the transmitter dips just slightly someone walks in front of the antenna you will experience momentary squelching of the audio CAUTION Ensure proper setting of the squelch adjustment to prevent user ear damage and unwanted radio noise Users will find unsquelched radio noise very objectionable LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West Suite A Sandy Utah 84070 2515 USA Phone 1 801 233 8992 U S A Toll Free 1 800 330 0891 Fax 1 801 233 8995 www Listenlech com LR 100 Stationary Receiver Power Amplifier Listen www ListenTech com Resetting After an Overload Condition In an overload condition the LR 100 will go into a protective state to protect the unit and power supply from excessive current and heat This condition will occur if the speaker termi nals
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