Китайская электронная обучающая лаборатория на английском языке с программным обеспечением и

System

1.        MTBF: more than 1000 hours, Crash and failure dropped≤ 1.

2.        The success rate of terminal start: 100%

3.        Conditions of Use: -10- 45 ℃.

4.        Relative Humidity: 20% -80%.

5.        Atmospheric pressure 86-106Kpa.

6.        System power supply 220V ± 22V AC voltage.

7.        Power frequency: 50 ± 2.5Hz.

Audio Data Switch

1.        Of 128 44.1 KHz/16bit audio data transmission, voice delay <1ms.

2.        Power supply: standard 220V ± 22V power supply, output voltage: 9V.

3.        Intelligent switches: all the students’ terminal power supply unified by audio data switch.

4.        SNR> 80dB, distortion <1%.

5.        Three-in-one network port (power supply, communication control, data exchange).

Student Terminal

1.        Continuously variable transmission to the same tune: 50% - +200%.

2.        SNR> 80Db.

3.        Frequency Response: 125Hz-10.0kHz (± 2dB), more than 16-bit linear sampling.

4.        The recording time: ≥ 600 minutes.

Headset

Headphones:

1.        Frequency Response: 125Hz ~ 8000 Hz, ± 17 dB (0dB = 20uPa The) (input power = 1mW).

2.        Electrical Impedance: 32Ω± 20%.

3.        Sensitivity≥ 100dB/1mW (0dB = 20uPa).

Microphone:

1.        Frequency response: 40-20000HZ.

2.        Type: electrets microphone.

3.        Sensitivity: -47 ± 2 dB (0 dB = 1V/Pa).

4.        Directional type: two-way.

Voice Delay

1.        broadcast≤1ms.

2.        Intercom≤1ms.

3.        Breakdown time: 0.

Network

1.        Three-in-one network mode.

2.        Power supply, data exchange and communication control through CAT 5/6.