CM6571 Datasheet, PDF (61/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
Audio Precision
A-D THD+N vs FREQUENCY
12/28/11 10:42:20 Audio Precision
A-D THD+N vs FREQUENCY
12/28/11 10:45:36
dx=19.9800 kHz
+40
dy=+0.570 dB
dx=-19.980 kHz
+10
dy=-0.194 dB
+20
+0
d
B
-20
r
-40
A
-60
+5
+-00..1072+130
d
-5
B
r
-10
A
-15
-20
-810.05-8810
-100
20
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
Anlr.THD+N Ampl Left
A-A THD+N.at27
10k 202k0k
-25
-30
20
50
100
200
500
1k
2k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
Anlr.Ampl Left
1
2
Cyan Solid
1
Anlr.Ampl Left
A-A FR+PR.at27
5k
10k 202k0k
Curs or1
*-0.171 dBr
-0.099 dBr A
FIGURE 31. LINE IN TO LINE OUT, THD+N
FIGURE 32. LINE IN TO LINE OUT, FREQUENCY RESPONSE
Audio Precision
A-D THD+N vs FREQUENCY
12/28/11 10:45:36 Audio Precision
A-D THD+N vs FREQUENCY
12/28/11 11:01:21
+1
+0.8
dx=76.8234 Hz
dy=+0.002 dB
+0.6
+0.4
d
+0.2
B
r _-0.00+420
A
-0.2
-0.4
-0.6
-0.8
-1
20
50
100 1862.20220623.045 500
1k
2k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
Anlr.Ampl Left
1
2
Cyan Solid
1
Anlr.Ampl Left
A-A FR+PR.at27
5k
10k 20k
Curs or1
*-0.004 dBr
+0.066 dBr A
dx=19.9307 kHz
+0
dy=-26.636 dB
-20
-40
d
-60
B
-80
-82.012
-100
-108.648
-120
20
5069.3474100
200
500
1k
2k
Hz
5k
10k 202k0k
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
Anlr.Crosstalk Left
1
2
Cyan Solid
1
Anlr.Crosstalk Left
Curs or1
-103.624 dB
*-108.648 dB
A-A CrossTalk.at27
FIGURE 33. LINE IN TO LINE OUT, PASSBAND RIPPLE
FIGURE 34. LINE IN TO LINE OUT, CROSSTALK L
Audio Precision
A-D THD+N vs FREQUENCY
dx=19.9786 kHz
+0
dy=+21.382 dB
12/28/11 11:01:21
-20
-40
d
-60
B
-80
-82.007
-100
-103.389
-120
212.04304
50
100
200
500
1k
2k
Hz
5k
10k 202k0k
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
Anlr.Crosstalk Left
1
2
Cyan Solid
1
Anlr.Crosstalk Left
A-A CrossTalk.at27
Curs or1
*-103.389 dB
-105.533 dB
FIGURE 35. LINE IN TO LINE OUT, CROSSTALK R
Revised: Nov. 2012
Page 61 / 63
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