VISSONIC Digital Infrared Language Distribution System Digital Infrared Receivers

VISSONIC Digital Infrared Language Distribution System Digital Infrared Receivers

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

1.Compliant to IEC 61603-7 and IEC 60914

2.Compatible with any other IR simultaneous interpretation system compliant to IEC 61603-7

3.Digital infrared processor with DQPSK digital modulation/demodulation technology

4.Transmitting in 2~8 MHz frequency band eliminates disturbance from high frequency lighting systems

5.Channel selection via up/down button, at most 4,8,16 or 32 channels available

6.LCD display with channel number, language name, battery and signal status indication

7.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

8.Adjustable volume

9.Unique 270º super wide reception angle, ensuring perfect sound quality even when casually placed

10.Audio signal automatically muted when signal is too low, ensuring that the user receives only high quality audio.

11.Ergonomically compact and elegant design

12.Lightweight and handy receiver in conjunction with single earphone or headphone for easy and comfortable use

13.Can be hung over the neck via a nice strap or fit into pocket

14.Free movement within the range of IR power radiator

15.No limit to the receiver number within the IR power radiation range

16.Works without errors, even in bright sunlight

17.Built-in high precision rechargeable circuitry to prolong battery life

18.Environmentally-friendly lithium rechargeable battery pack

19.No power consumption and auto-off when headphone is disconnected after 5 minutes

Technical Parameters

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

System Diagram

Application