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Listen LT-700-072 User Manual

Portable display fm transmitter
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Summary of Contents for Listen LT-700-072

  • Page 3 Here’s how to reach us: +1.801.233.8992 +1.800.330.0891 North America +1.801.233.8995 support@listentech.com www.listentech.com Thank you and enjoy your listening experience! Best regards, Russell Gentner and the Listen Team • In the few instances where repairs were needed, 99% of all clients indicated that they were happy with repair turn-around-times and 85% of the time, clients were without their product for less than 10 days! •...

  • Page 5: Table Of Contents

    LT-700 Table of Contents Package Contents 72/216 MHz Specifi cations 863 MHz Specifi cations Quick Reference Setup Instructions Operating Instructions Programming Instructions Charging Batteries Wall Transformer Operation Channel Selection Listen SQ™ RF Reception Maximization Strategies 72 MHz Frequency Compatibility Table 216 MHz Frequency Compatibility Table Troubleshooting Compliance Notice...

  • Page 7: Package Contents

    LT-700 Package Contents LT-700-072/216 Contents LT-700-863 Contents • LT-700-072 (72 MHz) or • LT-700-863 (863 MHz) • LT-700-216 (216 MHz) Listen Part Number Listen Part Number LT-700-072 (72 MHz) LT-700-863 (863 MHz) LT-700-216 (216 MHz) Optional Accessories See page 23...

  • Page 8: 72/216 Mhz Specifi Cations

    RF signal strength. The portable transmitter shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen LT-700 is specified. Specifi cation Specifi cation LT-700-072 LT-700-216 RF Frequency Range 72.025 - 75.975 MHz 216.025 - 216.987 MHz...

  • Page 9: 863 Mhz Specifi Cations

    LT-700 Specifi cations Architectural Specifi cations The portable FM Transmitter shall be capable of broadcasting on 17 channels Channel tuning shall be capable of being locked. The transmitter shall have a SNR of 70 db or greater. The output power shall be adjustable to quarter, half or full.

  • Page 10: Quick Reference

    LT-700 Quick Reference LT-700 Front MUTE / TALK switch (more information on page 7) 3.5mm Input Jack A Listen microphone or line level cable connects here. Look & Listen Display™ The display shows level, channel, battery status, PROGRAM mode, whether a channel is locked, and whether a channel is locked out from selection (PROGRAM mode).
  • Page 11 LT-700 Quick Reference LT-700 Inside Access Door Battery Select Switch SQ Switch Mic Sensitivity Switch Mic Sensitivity Switch - it arrives set at MID, which will work for most microphones. If your mic level is too low, change the switch to HI;...

  • Page 12: Setup Instructions

    LT-700 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. See page 22 for contact information. 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 13 LT-700 Setup Instructions (cont.) Place Batteries in Unit Place two AA batteries in the compartment, making note of the battery polarity shown in the battery compartment, and again verifying that the BATTERY SELECT switch is in the correct position for the batteries you are using.

  • Page 14: Operating Instructions

    Press and hold either button again to unlock. 72MHz Units The LT-700-072 operates on 17 wide band channels and 40 narrow band channels. Channels represented by letters in the display (i.e. A) are wide band channels; channels represented by numbers are narrow band channels.

  • Page 15: Programming Instructions

    LT-700 Programming Instructions The LT-700 can be programmed to transmit on a limited number of channels. For applications where users are required to select a channel (such as classrooms or language interpretation), and you don’t want them to have to scroll through all of the available channels, this feature is ideal. You can set up the LT-700 so that only the channels they need to use are available for selection with the UP and DOWN buttons.

  • Page 16: Charging Batteries

    NOTE: Listen uses 2100mAh (milli-Amp-hour) constant current NiMH (Nickel Metal Hydride) batteries. These may be purchased from your Listen dealer (ask for part number LA-362). One of several charging cases available from Listen. See www.ListenTech.com for more options. LA-311 - 16-unit Drop In Charging Case shown...

  • Page 17: Wall Transformer Operation

    LT-700 Wall Transformer Operation The LT-700 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 LT-700 marked “PWR/CHG” and plug the wall transformer into a grounded AC outlet. You do not need to have batteries installed in the LT-700 to operate it with a wall transformer.

  • Page 18: 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 and error. Before turning on the transmitter, listen to the wide band channels (lettered channels at 72MHz and channels that start with a “2” for 216MHz when using a Listen receiver).

  • Page 19: Listen Sq

    Listen SQ™ - Improving your Listening Experience People are accustomed to listening to low noise, high fi delity audio (delivered via • SQ is NOT squelch CD, DVD, etc.). FM radio systems, such as those made by Listen, have more •...

  • Page 20: Rf Reception Maximization Strategies

    RF Reception Maximization Strategies For proper and dependable operation, Listen receivers should receive a strong and consistent signal from the originating transmitter. The following strategies should be used maximize this signal: a. When using your system, keep in mind that the location of both the transmitter and receiver is critical to maximizing signal strength.

  • Page 21: 72 Mhz Frequency Compatibility Table

    72 MHz Compatibility Chart Frequency Phonak Phonic Listen Microfi eld Comtek Williams* Gentner Telex Drake 72.0250 (11, 1) 72.0500 72.0750 (12, 3) 72.1000 A, (13, 4) 72.1 72.1250 (14, 5) 72.1500 72.1750 (15, 7) 72.2000 K, (8) 72.2 72.2250 (16, 9) 72.2500 (10) 72.2750...

  • Page 22: 216 Mhz Frequency Compatibility Table

    216 MHz Compatibility Chart Frequency Phonak Light Listen Microfi eld Comtek Williams Gentner Speed 216.0125 216.0250 216.0375 216.0625 216.0750 216.0875 216.1125 216.1250 216.1375 216.1625 216.1750 216.1875 216.2125 216.2250 216.2375 216.2625 216.2750 216.2875 216.3125 216.3250 216.3375 216.3625 216.3750 216.3875 216.4125 216.4250 216.4375 216.5125 216.5250...

  • Page 23: Troubleshooting

    LT-700 Troubleshooting Troubleshooting The LT-700 has no power Make sure the unit has fully charged batteries, or has a Listen LA-202 wall transformer connected to it. Press the ON button. If this does not work, try a different set of batteries. Make sure the batteries are installed correctly.
  • Page 24 LT-700 Troubleshooting (cont.) Troubleshooting There is not sufficient range The LT-700 is a portable transmitter that uses the microphone cable as an antenna and the range will vary depending on the location of the receivers compared to the transmitter. You can only expect about 100 feet of average effective working range.

  • Page 25: Compliance Notice

    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. Listen’s LT-700 Transmitter (216MHz only) Listen’s LT-700 transmitter is authorized by rule under the Low Power Radio Service (47 C.F.R.

  • Page 26: Warranty

    Listen’s corporate headquarters are located in Bluffdale, Utah U.S.A. and are open Monday through Friday, 8am to 5pm Mountain Time. Listen Technologies GmbH 14912 Heritagecrest Way Jasminstr.16, 90522 Oberasbach, Germany Bluffdale, Utah 84065-4818 +49 911 955 159 0 +1.801.233.8992 Europe +1.800.330.0891 North America +49 911 955 159 40 +1.801.233.8995 fax support@listentech.de www.listentech.de support@listentech.com www.listentech.com...

  • Page 27: Optional Accessories

    Optional Accessories Microphone Accessories LA-270 LA-272 LA-261 LA-2 -261 LA-262 LA-274 Noise Canceling Over-the-Head Mic Hand-Held Lavalier Microphone Over-the-Head w/ Earphone Microphone Microphone Microphone LA-276 LA-277 LA-278 LA-278 LA-263 LA-279 LA 2 LA-2 Conferencing Collar Behind-the-Head Line/Mic Y Input Over-the-Ear Microphone Microphone Microphone Microphone...
  • Page 28 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 Printed in the United States of America © 2008 Listen Technologies Corporation All Rights Reserved 081308 ®...

This manual is also suitable for:

Lt-700-216Lt-700-863Lt-700-216Lt-700-863

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