DIGITAL AUDIO MIXER

(1) 기   능

본 기기의 기능은 마이크와 신호라인들을 통해 전송받은 음성신호를 조정하고 다시 증폭하여 하나의 신호로 혼합하여 앰프로 전송하는 장비로 다음의 성능 이상이어야 한다.

(2) 기기 특성

- Channel	: 28 IN / 11 OUT

Microphone Inputs

- input	Electronically balanced

- Frequency Response to direct Output	: 20Hz - 20KHZ at 0dBu ±0.5dB

- Distortion (THD&N) to Main Output	: 0,005% at 4dBu 1KHz

- SNR (Signal to Noise Ratio)	: 108dB

- Maximum Input Level	: +22dBu

- Phantom Power(+/-3V)	: +48VDC

Line inputs

- Inputs	: Unbalanced

- Frequency Response to direct Output	: 20Hz-20KHz at 0dBu ± 0.5dB

- Distortion (THD&N) to Main Output	: <0,005 % at 4dBu 1 KHz

- Gain	: -15dBu / ±35dBu

- Maximum Input Level (Gain at 0dBu)	: +18dBu

USB

- Frequency Response to Main Output	: 20Hz-20KHz at +4dBu ±0.5dB

- Distortion (THD&N) to Main Output	: <0,005% at 0dBu 1 KHz

Gain	: -∞ to +10dBu

- Maximum Input Level	: +22dBu

- Maximum Output Level

Main Outputs	: +20dBu

- Control Room Outputs	: +20dBu

- Phone Out	: +20dBu

System Crosstalk

- Input to Output (at +4dBu 1 KHz)	: -90dBu

- Adjacent Channels (at +4dBu 1 KHz)	: -90dBu

- Noise (Bus noise)	: -90dBu

Noise Gate

- Threshold Range	: -90dBu - 0dB

- Attack time	: 0.5ms - 200ms

- Release time	: 5ms - 2s

Compressor

- Threshold Range	: -30dBu ±20dB

- Attack time	: 10ms - 150ms

- Release time	: 10ms - Is

- Ratio	: 1:1 to 28:1

- Gain	: 0dBu - +24dB

EO

- Low (Low Pass or Low Shelf)	: 21Hz - 19.2KHz ±24dB

- Low Mid	: 21Hz - 19.2KHz ±24dB

- High Mid	: 21Hz-  19.2KHz ±24dB

- High (High Pass or High Shelf)	: 21Hz - 19.2KHz ±24dB

Digital Audio

- ADC Dynamic Range	: 14dB

- DAC Dynamic Range	: 114dB

- Internal Processor	: 32bit, floating point

- ADC, DAC bit depth	: 24bit

Impedances

- Microphone input	: 1,4KOhm

- Channel Insert return	: 2.5KOhm

- All other inputs	: 10K Ohm or greater

- Tape out	: 1K Ohm

- All other output	: 120 Ohm

Physical

- Operating free-air temperature range	: 0°C - 40°C

- Storage temperature range	: -20°C - 60°C

- Dimensions	: 535 x 485 x 205  mm

- Weight	: 10.7 kg