User Manual for Listen Technologies 15-Person Advanced Portable RF System Click to enlarge the picture
Contents of the user manual for the Listen Technologies 15-Person Advanced Portable RF
- Product category: Assistive Listening Systems Listen Technologies
- Brand: Listen Technologies
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Listen Technologies Assistive Listening Systems
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User manual for the Listen Technologies 15-Person Advanced Portable RF contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Listen Technologies product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Listen Technologies user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Listen Technologies product will considerably shorten its lifespan!
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Product description The 72 MHz 15-Person Advanced Portable RF System from Listen Technologies is a complete assistive listening system designed for group applications, such as with tour guides or language interpretation. It includes one Listen Technologies Portable Display RF Transmitter, one Behind-the-Head Microphone, fifteen Portable Programmable Display RF Receivers, fifteen Ear Speakers, one 16-unit Portable RF Product Charging/Carrying Case, and thirty-two Rechargeable AA NiMH batteries. - LT-700 Portable Display RF Transmitter (72 MHz) The 72 MHz Listen Technologies LT-700 Portable Display RF Transmitter is used to wirelessly broadcast audio for a variety of portable applications. Whether its voice or music, you can broadcast your audio to everyone in the audience without having to carry a microphone or be plugged into a wall. The LT-700-072 is suitable for factory tours, outdoor events, wireless microphone applications, classrooms, training, or personal use - anywhere you need to amplify sound, but don't have (or want) an installed system. The many features of the LT-700 have made portable transmission considerably easier.
This product is approved by the FCC for use in the US. Please note that it cannot be used in all countries. Check with your local government or specific regulation with regard to broadcast frequency in your specific country. Note: FCC rules limit the use of this product to assistive listening. - A potent 80 dB signal-to-noise ratio
- A choice between 57 channels, with complete antenna and accessory options makes the LT-700-72 MHz suitable for a wide range of applications
- Look & Listen LCD shows channel, battery status, and programming information
- 100 % Digital - Listen receivers are digitally-tuned so transmission won't drift; assurance that when you select a channel, it stays on the channel
- Transmit up to six (6) channels simultaneously
- Uses standard alkaline or NiMH batteries
- Transformer charging plug or drop in charging contacts
- Built in SmartCharge won't allow batteries to overcharge
- Charging circuitry is conveniently built into Listen's LT-700 Transmitter; never worry about unplugging a transformer at a certain time
- Mic and/or line level inputs
UPC: 819267023192 - LA-278 Behind-the-Head Microphone The LA-278 Behind-the-Head Microphone from Listen Technologies is compatible with the LT-700 Portable Transmitter. The directional microphone is designed to cancel ambient noise and fits securely over your ears and around the back of your neck. It also features an antenna for the transmitter in the microphone cord.
- Ideal for use when unobtrusive placement and high performance are critical
- Designed to cancel ambient noise
- Fits securely over ears and around the back of the neck
- The transmitter antenna is built into the microphone cord
UPC: 819267020788 - Portable Programmable Display RF Receiver (72 MHz) The Portable Programmable Display RF Receiver from Listen Technologies is a 72 MHz receiver. It can receive up to 57 channels and has a Look & Listen LCD Display that shows programming status, channel, lock, battery level, and RF signal strength. Channel selector buttons are located on the front of the unit. It has channel SEEK capability and is compatible with mono or stereo headsets. It takes AA batteries (alkaline or NiMH rechargeable). SmartCharge capabilities prevent overcharging.
- 80 dB signal-to-noise ratio (SNR)
- Unneeded channels can be locked so this receiver will access only one or more channels of your choice
- Receiver is digitally-tuned so the transmission won't drift
- Uses standard alkaline or nickel-metal hydride (NiMH) batteries
- Built in SmartCharge won't allow batteries to overcharge
- Transformer charging plug
UPC: 819267022317 - LA-164 Ear Speaker The LA-164 Ear Speaker from Listen Technologies is designed to fit easily over your ear. It's constructed of hard plastic, making it easy to clean. The earpiece can be used at venues where it can be continuously cleaned and re-used, or with hearing aids.
- Single ear clip does not mess up hair
- The receiver's antenna is built into the headphone cord
UPC: 819267020368 - LA-311-01 16-Unit Portable RF Product Charging/Carrying Case (Gray) The grey LA-311-01 16-Unit Portable RF Product Charging/Carrying Case from Listen Technologies is compatible with the company's LT-700, LR-200, LR-300 and LR-500 series products. It is designed with 16 separate slots for storing and charging your RF devices, as well as individual earphone slots to prevent cable tangling. A power cable connects the case to a standard electrical outlet, and the units will automatically turn off once they are fully charged. There is a large pocket for storing the power supply, headsets, and any additional accessories. Durable latches with included keys allow you to lock the case for additional security. The case can be carried using the metal handle or by using the included detachable shoulder strap.
- Sturdy case with hard foam interior and durable latches
- Stores up to 16 receivers and portable transmitters
- Large and small pocketets store earphones and other accessories
- Earphones can remain attached to receivers during storage
- Case comes with keys and can be locked for security
- Detachable nylon carrying strap
UPC: 819267020849 - LA-362 Rechargeable AA NiMH Batteries (Pack of 2) The pack of two LA-362 Rechargeable AA NiMH Batteries from Listen Technologies are designed to be recharged many times. They can be used with the company's charging cases, belt pack devices, and LR-600 Wireless Speaker/Receiver. The batteries provide 1.2V of power and have a 2300 mA capacity.
- Can be recharged many times
- Standard size AA batteries
UPC: 819267021228 In the Box Bundle Items LT-700 Portable Display RF Transmitter (72 MHz) ybecsvcecvsvy - Limited Lifetime Warranty
LA-278 Behind-the-Head Microphone 15 x Portable Programmable Display RF Receiver (72 MHz) - Limited Lifetime Warranty
15 x LA-164 Ear Speaker LA-311-01 16-Unit Portable RF Product Charging/Carrying Case (Gray) 16 x LA-362 Rechargeable AA NiMH Batteries (Pack of 2)
Also Includes - Limited Lifetime Warranty
Table of Contents
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Technical parameters - LT-700 Portable Display RF Transmitter (72 MHz)
| | | Frequency Response ± 3dB | 50 to 15 kHz | | Signal-to-Noise Ratio | SQ enabled: 80 dB; SQ disabled 60 dB | | Distortion | <2% total harmonic distortion (THD) at 80% deviation | | Microphone Sensitivity | Three position switch: high, middle, and low; 6 db increments | | Line Input | Unbalanced, ring of 3.5 mm connector, -10 dbu nominal input level, -3 dbu maximum, impedance 10 kOhms | | Microphone Power | 5 VDC Bias | | Microphone Input | Unbalanced, tip of 3.5 mm connector, -45 dBu nominal input level, -30 dBu maximum, impedance 20 kOhms | | | | User Controls | Power
Mute
Channel UP/DOWN
Mic sensitivity
NiMH/alkaline battery
SQ enable/disable
Programming:
Channel lock out
Channel lock | | Indicators | LEDs:
Red, illuminated when unit is on
Flashes when batteries are low, or to indicate charging
Flashes when muted
LCD:
Channel Designation
Lock status
Signal strength indication
Battery life
RF Power | | | | Frequency Range | 72.025 to 75.950 MHz | | Supported Transmitters | 6 | | Frequency Accuracy | ± .005% stability 32 to 122ºF (0 to 50ºC) | | Transmission Stability | 50 PPM | | Transmission Range | From 0 to 150' (45.7 m) | | Output Power | <10 mW | | Antenna Type | Microphone cable | | Antenna Connector | 3.5 mm | | | | Battery Type | 2 x AA batteries, alkaline or NiMH | | Battery Life | 15 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362) | | Battery Charging Time | Fully automatic, 13 hours | | Power Supply | I/P 120VAC; O/P 7.5VDC 250 mA; Drop in contact points for use with charging cases. Power supply optional, not included (LA-208) | | Power Supply Connector | 2.3mm OD by 0.7mm ID, barrel type connector 7.5 VDC, center positive <250mA.
Drop in contact points for use with Listen charging cases | | Compliance | RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant
RF:FCC Part 15, Industry Canada
Safety: RoHS | | | | Temperature (Operating) | 14 to 104º F (-10 to 40ºC) | | Storage Temperature | -4 to 122°F (-20 to 50ºC) | | Relative Humidity | 0 to 95% relative humidity, non-condensing | | Color | Dark gray with white silk screening | | Door Type | Manually lockable, controls accessible through doors | | Component Dimensions & Weights | Dimensions(H x W x D): 5 x 3 x 1"(13.0 x 7.6 x 2.5 cm)
Unit Weight with Batteries: 5.8 oz. (164 g)
3.9 oz. (111 g) | | | | Box Dimensions (LxWxH) | 6.063 x 4.331 x 2.126" | - LA-278 Behind-the-Head Microphone
| Compatibility | Listen Technologies LT-700 Portable Transmitter | | Frequency Response | 300 Hz to 10 kHz | | Impedance | 1 kOhm | | Phantom Power | 3 VDC required | | Connections | 1 x 3.5 mm Mono | | Approvals and Compliance | RoHS | | Cable Length | 55.0" / 139.7 cm | | Weight | 2.0 oz / 56.7 g | | | | Box Dimensions (LxWxH) | 6.221 x 6.063 x 1.654" | - Portable Programmable Display RF Receiver (72 MHz)
| | | RF Frequency Range | 72.025 to 75.95 MHz | | Number of Channels | 17 wide band, 40 narrow band | | Sensitivity | 0.6 uV typical, 1 uV maximum for 12 dB SINAD | | Frequency Accuracy | ± .005% stability +32 to 122°F (0 to 50°C) | | Antenna Type | Uses earphone cable | | Squelch | Programmable in 20 steps, automatic on loss of RF signal | | | | Frequency Response | System: 50 Hz to 15 kHz (±3 dB) | | Signal to Noise Ratio | SQ enabled: 80dB; SQ disabled 60dB | | System Distortion | <2% total harmonic distortion (THD) at 80% deviation | | Audio Output Jack | 3.5 mm connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, 32 Ohms | | | | User Controls | Channel up/down, SEEK, volume, SQ enable/disable | | Programming | Channel lock, squelch, channel lock out | | | | LEDs | Red, illuminated when unit is on, flashes when batteries are low or to indicate charging, flashes when locked and SEEK is pushed | | LCD | Channel Designation, lock status, signal strength indication, programming | | | | Battery Type | 2 x AA batteries, alkaline or NiMH | | Battery Life | 30 hours alkaline, 15 hours NiMH rechargeable | | Battery Charging Time | Fully automatic, 13 hours | | Power Supply | I/P 120 VAC, O/P 7.5 VDC 250 mA, drop in contact points for use with charging cases | | Power Supply Connector | 0.09 OD by 0.02" ID (2.3 OD by 0.7 mm ID}, barrel type connector 7.5 VDC, center positive <250 mA, drop in contact points for use with Listen charging cases | | Compliance | RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant | | | | Operation Temperature | 14 to 104°F (-10 to 40°C) | | Storage Temperature | -4 to 122°F (-20 to 50°C) | | Humidity (Non-Condensing) | 0 to 95% relative humidity | | | | RF | FCC Part 15, Industry Canada | | | | Color | Dark gray with white silk screening | | Doors | Manually lockable, up, down, and power buttons through door, and other controls behind door | | Dimensions | 3 x 5 x 1" (7.6 x 13 x 2.5 cm) | | Weight | Unit: 3.9 oz (111 g) Unit with Batteries: 5.8 oz (164 g) | | | | Box Dimensions (LxWxH) | 6.0 x 4.5 x 2.1" | - LA-164 Ear Speaker
| Connections | 1 x 3.5 mm Stereo | | Frequency Response | 20 Hz to 20 kHz | | Impedance | 32 Ohms ±15% @ 1 kHz | | Input Sensitivity | Headset: 115 dB ±4 dB @ 1 kHz, 1 mW | | Power Input | Rated: 50 mW
Maximum: 100 mW | | Approvals and Compliance | RoHS | | Cable Length | 36.0" / 91.4 cm | | Weight | 4.0 oz / 113.4 g | | | | Box Dimensions (LxWxH) | 2.3 x 2.3 x 1.5" | - LA-311-01 16-Unit Portable RF Product Charging/Carrying Case (Gray)
| Compatibility | Listen Technologies LT-700, LR-200, LR-300, LR-400, LR-500
NiMH batteries | | Capacity | 16 Units | | Power Supply Input | 100 to 240 V, 50 to 60 Hz, 1200 mA | | Power Supply Output | 7.5 V, 4 A, 30 W | | Approvals and Compliance | Power Supply Compliance: UL, CE, GS, TUV, RoHS
Safety: RoHS | | Material | Exterior: hard case
Interior: foam
Carrying strap: nylon | | Power Cord Length | 12.0' / 3.7 m | | Dimensions | 7.0 x 18.5 x 13.8" / 17.8 x 47.0 x 34.9 cm
Shoulder Strap Length: adjustable 33.0 to 53.0" / 83.8 to 134.6 cm | | Weight | 7.6 lb / 3.4 kg | | | | Box Dimensions (LxWxH) | 19.2 x 15.0 x 7.7" | - LA-362 Rechargeable AA NiMH Batteries (Pack of 2)
| Packaged Quantity | 2 | | Battery Size | AA | | Classification | NiMH | | Nominal Voltage | 1.2 VDC | | Battery Capacity | 2300 mA | | Operating Temperature | 0 to 131°F / -18 to 55°C | | Weight | 1.1 oz / 31.2 g | | | | Box Dimensions (LxWxH) | 2.3 x 1.8 x 0.3" |
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