Benchmark DAC3 HGC - Performance Graphs

Instruction Manual for DAC3 HGC and DAC3 L with 2.X Firmware Page 47
Performance Graphs
Graph 1 – FFT Idle Channel Noise
The extraordinary performance of the DAC3 is demonstrated by the FFT plot shown above. There
is no sign of any AC hum, there are no idle tones, and there are no spurious tones detected at a
measurement limit of -160 dBFS.
The rise at 0 Hz is normal in an FFT analysis and is not an indication of noise. This 32k point FFT
analysis uses a Blackman-Harris window with 16x power averaging, and spans a frequency range
of DC to 32 kHz.
Audio Precision
DAC3 - FFT Idle Channel Noise at Max Gain, 0 dBr = 0 dBFS = 27.5 dBu
DAC3 - FFT Idle Channel Noise.at27
Color
Sweep Trace Line Style
Thick Data Axis
Comment
1
1 Green
Solid 4 Fft.Ch.1 Ampl
Left
1 2 Red
Solid 4 Fft.Ch.2 Ampl
Right
-160
+0
-140
-120
-100
-80
-60
-40
-20
d
B
r
A
-160
+0
-140
-120
-100
-80
-60
-40
-20
d
B
r
A
0
32k
2k
4k 6k
8k 10k
12k
14k
16k
18k
20k 22k
24k
26k
28k
30k
Hz