CVSD Codec
1.7.1.3 Operating Characteristics (continued)
Typical Codec Performance
CMX639
0
Input Level = -15dBmO
Data Clocks = 32kbps
Xtal = 1.024MHz
-10
-20
-30
-40
-50
-60
1
2
3
4
5
6
Frequency (kHz)
Figure 5 Typical Frequency Response (32kbps)
Input Level = -20dB
35
30
64kb/s
25
20
32kb/s
15
10
16kb/s
5
500
1000
1500
2000
2500
3000
3500
Frequency (Hz)
Figure 6 Typical S/N Ratio with Input Frequency
© 2000 Consumer Microcircuits Limited
13
CMX639/2