Listen Technologies LR-500 User Manual
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Listen Technologies LR-500 User Manual

Portable programmamble display fm receiver; portable display fm receiver
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Summary of Contents for Listen Technologies LR-500

  • Page 3 Dear Valued Customer, Thank you for choosing Listen! All of us at Listen are dedicated to providing you with the highest quality products available. We take great pride in their outstanding performance because we care that you are completely satisfi ed. That’s why we independently certify them to the highest quality standards and back them with a limited lifetime guarantee.

  • Page 5: Table Of Contents

    Receivers Table of Contents LR-500 Manual LR-500 Table of Contents LR-400 Manual LR-400 Table of Contents Supplementary Information Channel Selection Listen SQ™ RF Reception Maximization Strategies 150 MHz Frequency Compatibility Table Troubleshooting Warranty Contacting Listen Optional Accessories...
  • Page 9 LR-500 Table of Contents Package Contents Architectural Specifi cations Specifi cations Quick Reference Setup Instructions Operation Instructions Programming Instructions Squelch Information Squelch Programming Charging Batteries Wall Transformer Operation...

  • Page 10: Package Contents

    LR-500 Package Contents LR-500 Contents • LR-500 Portable Programmable Display FM Receiver (150 MHz) Listen Part Number •LR-500-150 (150 MHz)

  • Page 11: Architectural Specifi Cations

    The device shall incorporate an LCD display. The receiver shall incorporate automatic battery charging circuitry. The device shall be able to use of two (2) alkaline or NiMH batteries. The Listen LR-500-150 is specifi ed. Specifi cations* RF Frequency Range 150.8000 MHz - 152.3500 MHz...

  • Page 12: Quick Reference

    LR-500 Quick Reference LED: When lit, unit is on. When batteries are low or when charging the LED fl ashes. 3.5 mm Output Jack: Connect a Listen On/Off and Volume Control Dial earphone(s) here. Look&Listen™ Display: Shows receive level, channel,...

  • Page 13: Setup Instructions

    LR-500 Setup Instructions Remove the product Remove outer packaging and plastic cover. Inspect for physical damage. If damage is apparent, please contact Listen Technologies Corporation technical support for assistance. Open the front access door If locked, use a pocketknife or small screwdriver to unlock the door locks on both sides of the unit.
  • Page 14 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.

  • Page 15: Operation Instructions

    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 for a real broadcast signal.
  • Page 16 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 the top of the unit will flash when you press the SEEK button.

  • Page 17: Programming Instructions

    LR-500 Programming Instructions The LR-500 Display Receiver has some special features 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 For applications where users are required to select a channel (such as language interpretation or classrooms), and you don’t want them to have to go through all 32 available channels to find the...

  • Page 18: Squelch Programming

    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.

  • Page 19: Charging Batteries

    13-hour charge cycle over again. When not using the LR-500, it is recommended to leave the unit on the charger. The charger provides a “maintenance” charge that keeps the battery at 100%. If the unit is not on the charger, the battery will lose up to 20% of its charge per month.

  • Page 20: Wall Transformer Operation

    LR-500 marked “PWR/CHG” and plug the wall transformer into a grounded AC outlet. You do not need to have batteries installed in the LR-500 to operate it with a wall transformer. NOTE: If batteries are in the unit ensure that the battery selection switch is set properly as shown on page 9.

  • Page 25: Lr-400 Table Of Contents

    LR-400 Table of Contents Package Contents Architectural Specifi cations Specifi cations Quick Reference Setup Instructions Operation Instructions Squelch Information Squelch Programming Charging Batteries Wall Transformer Operation...
  • Page 26 LR-400 Package Contents LR-400 Contents • LR-400 Portable Display FM Receiver (150 MHz) Listen Part Number •LR-400-150 (150 MHz)
  • Page 27 LR-400 Specifi cations Architectural Specifi cations The FM receiver shall be capable of receiving on 32 channels. The receiver shall have a SNR of 80 dB or greater. The receiver shall be capable of seeking for open channels and locked on an active channel.
  • Page 28 LR-400 Quick Reference LED: When lit, unit is on. When batteries are low or when charging the LED fl ashes. 3.5 mm Output Jack: Connect a Listen On/Off and Volume Control Dial earphone(s) here. Look&Listen™ Display: Shows receive level, battery status, Power/Charging Port and lock status.
  • Page 29 LR-400 Setup Instructions Remove the product Remove outer packaging and plastic cover. Inspect for physical damage. If damage is apparent, please contact Listen Technologies Corporation technical support for assistance. Open the front access door If locked, use a pocketknife or small screwdriver to unlock the door locks on both sides of the unit.
  • Page 30 LR-400 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.
  • Page 31 LR-400 Operation Instructions Make Sure the Unit is On Rotate the volume knob counterclockwise with an earphone or headset connected to the unit. Listen receivers use the cable of the earphone or headset as a receiving antenna. Be careful when turning the unit on - if you turn 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...
  • Page 32 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 press the SEEK button.
  • Page 33 LR-400 Squelch Squelch The purpose of squelch is to mute the audio output of your receiver when the signal from the transmitter is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone. The squelch on your receiver can be adjusted so that it will mute the audio on different RF signal strengths.
  • Page 34 LR-400 Charging Batteries 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-208 wall transformer or dropped into a Listen charging case, NiMH batteries will be charged. To charge the batteries using the LA-208 wall transformer, plug the transformer into the jack marked “PWR/CHG”...
  • Page 35 LR-400 Wall Transformer Operation The LR-400 will operate normally when connected to a wall transformer. Use Listen part number LA-208, 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.

  • Page 36: Channel Selection

    Channel Selection It is important to choose channels that are free from interference to achieve proper operation of your Listen equipment. This process is trial Wide Band Recommendation and error. Before turning on the transmitter, listen to the wide band Listen recommends that you always channels on the receivers (channels 1-6).

  • Page 37: Listen Sq

    Listen SQ™ (Super Quiet) - Improving Your Listening Experience People are accustomed to listening to low noise, high fidelity audio SQ Summary (delivered via CD, DVD, etc.). FM radio systems, such as those made • SQ is NOT squelch by Listen, have more inherent noise compared to most sound systems. To minimize noise, Listen uses a noise reduction technology called •...

  • Page 38: Rf Reception Maximization Strategies

    RF Reception Maximization Strategies For proper and dependable operation, Listen receivers need to receive a strong and consistent signal from the originating transmitter. Note that on portable receivers the headset wire is the receiving antenna. The following strategies should be used maximize to this signal: When designing and installing your system, keep in mind that the location of both the transmitting and receiving antennas is critical to maximize broadcast range.
  • Page 39 150 MHz Compatibility Chart Channel Frequency 150.900 152.400 151.500 152.100 151.200 151.800 150.850 150.950 151.000 151.050 151.100 151.150 151.250 151.300 151.350 151.400 151.450 151.550 151.600 151.650 151.700 151.750 151.850 151.900 151.950 152.000 152.050 152.150 152.200 152.250 152.300 152.350...

  • Page 40: Troubleshooting

    Make sure you are located as close as possible to the antenna of the transmitter. Try to place the antenna as high as possible and free from obstacles. You can also check the squelch setting; perhaps it is too sensitive. To change this setting, refer page 14 (LR-500) or to page 29 (LR-400).

  • Page 41: Troubleshooting

    SEEK button for 5 seconds. When the channel is locked, the padlock icon will appear on the LR-400 and LR-500 displays. The LED will also flash when the channel is locked and seek is pressed. In addition, you can lock the access doors to the units.

  • Page 42: Warranty

    Listen Technologies Corporation (Listen) warrants its transmitters and receivers (LT-82, LT-700, LT-800, LR-42, LR-44, LR-400, LR-500) 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.

  • Page 43: Optional Accessories

    Optional Accessories Earphone Options LA-161 LA-162 LA-164 LA 164 Single Ear Bud Stereo Ear Buds Ear Speaker LA-165 LA-170 LA-170 Stereo Headphones LA-166 LA-166 Behind-the-Head Neck Loop Stereo Headphones Connector Options LA-266 LA-265 LA-275 Professional Consumer Sacrificial Cable Camcorder Cable Camcorder Cable...
  • Page 44 Optional Accessories Accessories LA-361 High Capacity AA Alkaline Batteries (2) LA-311 16-Unit Portable Charging/Carrying Case LA-313 16-Unit Portable Carrying Case LA-317 4-Unit Portable Charging/Carrying Case LA-318 4-Unit Portable Carrying Case LA-320 Confi gurable Carrying Case LA-321 8-Unit Portable Charging/Carrying Case LA-322 8-Unit Portable Carrying Case LA-362 LA-323 4-Unit Portable Charging/Carrying Case w/Removable Lid...
  • Page 45 Notes...
  • Page 46 Notes...
  • Page 47 Notes...
  • Page 48 Listen Technologies Corporation 14912 Heritagecrest Way Bluffdale, Utah 84065-4818, U.S.A. +1.801.233.8992 1.800.330.0891 North America +1.801.233.8995 www.listentech.com © 2009 Listen Technologies Corporation All Rights Reserved 09162009 ®...

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Lr-400

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