Audiolab M-DAC, Руководство по обслуживанию

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SPECIFICATION
M-DAC
M-DAC-Specification and Features-P1/2
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32Bit 84.000MHz 512 Element MultiBit Array DAC
Asynchronous USB supporting 24 Bits / 96kHz with Remote Control of PC / MAC
MediaPlayer via HID support
x2 192KHz 24Bits Coax SPDIF Digital Inputs
x2 96KHz Optical Digital Inputs
High Current, High Linearity RCA Single Ended & XLR True Balanced with fully discrete
JFET CROSS* Class A Output stage's
High Current, High Linearity CROSS* JFET Class A Headphone Amplifier
Triple cascaded Jitter attenuation stages, with triple cascaded Asynchronies Clock
domain isolation all but eliminating the First order effects of Jitter from the external input
Test condition: AC~253V, COAX: 997Hz Digital Signal,SR: 48kHz
Load: 10 kohms impedance, with Filter NAL setting
Z-out: 20ohms
M-DAC Performance Test
L R L R
1 Output Level 997Hz,Digital COAX Input Vrms 2.21 2.22 4.23 4.22
stereo 997Hz output 2V % 0.001 0.001 0.001 0.001
stereo 20kHz output 2V % 0.0005 0.0005
0.0002 0.0002
Line output, dB 108 108 116 116
Line output, with 22-22kHz BW and A-wtd dB 112 112 120 120
4 Gain 0dBFS Input (0dBV) dB
5 Noise Level no signal,pre-amp out dBV -100.8 -101.4 102.5 102.7
6 DC Offset To measure the output DC Voltage mV 0.8 0.5
7 Crosstalk L/R Cross talk,refer to 997Hz dB 108 108
116 116
8 L/R different L/R different,un-balance dB
9 Phase no reverse deg
10 Freq Respond Refer to 997Hz input as 0dBr,+/-0.5dB Hz
12 Idle Current Idle Current,230VAC mA
Condition Units
XLR
13.2
0.01
7.1
20-20k
0
18mA
0
20-20k
0.05
2 THD
RCA
S/N 3
No. Test Items
Digital OUT Test
Units Limit L R L R
1 Output Level dBFS 0±0.05 0 0 0 0
2 Harmonic Distortion % <0.005 0.00001 0.00001 0.00001 0.00001
3 L/R phase deg ±1 0 0 0 0
4 Digital Output Intensity Vpp >500
5 Level Linearity dBFS -143 -143 -143 -143
6 Frequency response dB 0.5dB 0.01 0.01 0.01 0.01
7 Output impedance ohm 75±1
32KHz
44.1KHz 44.1±0.01
48KHz 48±0.01
96KHz 96±0.01
No. Test item Track
44.1KHz
48KHz
96KHz
48KHz
8 Sampling Rate kHz
96KHz
44.1KHz
COAX
32, 44.1,48,96KHz
(16,24bit)
580
OPT
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