simultaneous interpretation

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 Listen Technologies Simultaneous Interpretation Receiver LR-300 Specs
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 50Hz to 15KHz, +/- 3dB at 72MHz

The device shall incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset and listen to audio normally.

The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen LR-300 is specified.

The LR-300 carries a 90-Day Performance Guarantee and the Listen Limited Lifetime Warranty.

  Specification LR-300 Specifications
RF RF Frequency Range 72.025 - 75.950 MHz
Number of Channels 17
Sensitivity .6uV typical, 1 uV maximum for 12dB SINAD
Frequency Accuracy ± .005% stability 0° to 50°C (32° to 122° F)
Antenna Uses earphone cable
Antenna Connector 3.5mm connector
Squelch Automatic on loss of RF signal
Compliance FCC Part 15, Industry Canada
Audio ** All system specifications are wireless end-to-end
System Frequency Response 63Hz - 15kHz (±3dB)
System Signal to Noise Ratio (A-weighted) SQ enabled: 80dB; SQ disabled 60dB
System Distortion <2% total harmonic distortion (THD) at 80% deviation
Output 3.5mm connectors, unbalanced, 0dBu nominal output level, 16mW maximum, impedance 32 Ohms
Controls Set Up Controls Alkaline/NiMH batteries and SQ enable/disable
User Controls Volume and SEEK. (SEEK is electronically lockable, and are behind the door).
Programming Channel selection can be locked by holding the SEEK button for 5 seconds
Indicators LED Red, illuminates when unit is on. Flashes when batteries are low. Flashes when charging. Flashes when locked and user attempts to seek to another channel.
Power 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
Power Supply Connector 2.3mm OD by 0.7mm ID, barrel type connector. 7.5VDC, center positive <250mA. Drop in contact points for use with Listen charging cases.
Compliance UL Listed
Physical Dimensions 3.0 in x 1.0 in x 5 in WxDxH (7.6cm x 2.5cm x
Unit Weight 3.9oz (111g)
Unit Weight with batteries 5.8 oz (164.4g)
Shipping Weight 1.0 lbs (453.6kg)
Door Manually lockable. SEEK behind the door (see Controls above).
Environmental Temperature - Operation -10° to 40°C (14° to 104° F)
Temperature - Storage -20° to 50°C (-4° to 122° F)
Humidity 0 to 95% relative humidity, non-condensing


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