These ergonomically designed pocket receivers incorporate the latest electronics technology. VIS-VLI703A series of IR receivers, which can receive up to 32 language channels and is equipped with channel selector, volume control, power switch, Ø 3.5 mm stereo earphone jack. A LCD displays channel number with language name, received signal intensity, battery capacity and volume. The pocket receivers can be used for both language and music distribution.
Features
Compliant to IEC 61603-7 and IEC 60914
Compatible 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 channels
Adjustable 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 pocket
Free movement within the range of IR power radiator
No limit to the receiver number within the IR power radiation range
Works without errors, even in bright sunlight
Built-in high precision rechargeable circuitry to prolong battery life
No power consumption and auto-off when headphone is disconnected after 5 minutes
Technical Specifications
Modulation...............DQPSK, according to IEC 61603-7 Modulation frequency Carriers 0 to 5...............2 to 6 MHz, according to IEC 61603-7 Frequency response...............20 Hz to 10 kHz (-3dB) at standard quality; 20 Hz to 20 kHz (-3dB) at perfect quality THD at 1 kHz ...............<0.05% Isolation...............>80 dB Dynamic range...............>80 dB Weighted SNR...............>80 dBA Input range...............-12 dBV ~ +12 dBV (adjustable) Electrical IR irradiance level...............4 mW/m2 per carrier Angle of sensitivity...............270º Headphone output level at 2.4 V 450 mVrms (speech at maximum volume, 32 Ohm headphone) Headphone output freq. range...............20 Hz to 20 kHz Headphone output impedance...............32 Ohm to 2 kOhm Max. SNR...............>80 dBA Supply voltage...............3V to 4.2V, nominal 3.7 V Headphone jack unplugged after 5 minutes...............0 mA Battery life Rechargeable battery pack ...............24 hours
Mechanical Dimensions (H x W x D) ...............159 x 49 x 23 mm Weight............... excluding battery 85 g, including battery 128g (0.27 lb) Color...............black with silver