msm7620 Oki Semiconductor, msm7620 Datasheet - Page 21

• Manufacturer Part Number: msm7620
• Description: Echo Canceler
• Manufacturer: Oki Semiconductor

¡ Semiconductor
ECHO CANCELER CHARACTERISTICS DIAGRAM
40
30
20
10
30
20
10
0
0
Measurement Conditions
RIN input = –10 dBm
5 kHz band white noise
(0 dBm = 2.2 dBm0)
Measurement Conditions
RIN input = –10 dBm 5 kHz band white noise
(0 dBm = 2.2 dBm0)
Echo delay time T
ATT, GC, NLP = OFF
0
ERL vs. echo attenuation
40
30
1
ERL. [dB]
20
50
D
= 20 ms
Echo delay time vs. echo attenuation
2
10
Echo delay time [ms]
0
100
3
–10
4
ERL = 6 dB
ATT, GC, NLP = OFF
The second through seventh chips
are connected in a cascade.
150
5
40
30
20
10
0
Measurement Conditions
RIN input: 5 kHz band white noise
Echo delay time T
ERL = 6 dB
ATT, GC, NLP = OFF
6
200
RIN input level vs. echo attenuation
–50 –40 –30 –20 –10
RIN input level [dBm]
7chip
0 dBm = 2.2 dBm0
D
= 20 ms
MSM7620
0
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