New Generation Digital Infrared Language Distribution System Digital Infrared Receivers

New Generation Digital Infrared Language Distribution System Digital Infrared ReceiversFeatureCompliant to IEC 61603-7 and IEC 60914Compatible with any other IR simultaneous interpretation system compliant to IEC 61603-7 Digital infrared processor with DQPSK digital modulation/demodulation technology Transmitting in 2~8 MHz frequency band eliminates disturbance from high frequency lighting systems Channel selection via up/down button, at most 4,8,16 or 32 channels available LCD display with channel number, language name, battery and signal status indication Number of available channels is always the same as the number of channels in use by the system, eliminating the need to scroll through unused channelsAdjustable volume Unique 270º super wide reception angle, ensuring perfect sound quality even when casually placed Audio signal automatically muted when signal is too low, ensuring that the user receives only high quality audio.Ergonomically compact and elegant design Lightweight and handy receiver in conjunction with single earphone or headphone for easy and comfortable use Can be hung over the neck via a nice strap or fit into the shirt pocket Freedom of movement within the range of IR power radiator No limit to the receiver number within the IR power radiation rangeWorks without errors, even in bright sunlight Built-in high precision rechargeable circuitry to prolong battery life Environmentally-friendly lithium rechargeable battery packNo power consumption and auto-off when headphone is disconnected after 5 minutesControls and IndicatorsLCD displays channel number, language name, battery capacity, signal intensity and volume Power switchChannel selector buttonsVolume control buttons InterconnectionsØ 3.5 mm stereo earphone jackCharging contacts Technical SpecificationsSystem SpecificationsModulation...............DQPSK, according to IEC 61603-7 Modulation frequencyCarriers 0 to 5...............2 to 6 MHz, according to IEC 61603-7Frequency response...............20 Hz to 10 kHz (-3dB) at standard quality;20 Hz to 20 kHz (-3dB) at perfect qualityTHD at 1 KHz ...............80 dBDynamic range...............>80 dBWeighted SNR...............>80 dBAInput range...............-12 dBV ~ +12 dBV (adjustable)ElectricalIR irradiance level...............4 mW/m2 per carrierAngle of sensitivity...............270ºHeadphone output level at 2.4 V  450 mVrms (speech at maximum volume, 32 Ohm headphone)Headphone output freq. range...............20 Hz to 20 kHzHeadphone output impedance...............32 Ohm to 2 kOhmMax. SNR...............>80 dBASupply voltage...............3V to 4.2V,nominal 3.7 VHeadphone jack unplugged after 5 minutes...............0 mA Battery lifeRechargeable battery pack ...............24 hours MechanicalDimensions (H x W x D) ...............159 x 49 x 23 mmWeight............... excluding battery 85 gincluding battery 128g (0.27 lb)Color...............black with silver  Application/* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1