參數(shù)資料
型號(hào): MSM7602
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: Echo Canceler
中文描述: 回聲消除器
文件頁數(shù): 20/29頁
文件大小: 238K
代理商: MSM7602
Semiconductor
MSM7602
20/29
ECHO CANCELER CHARACTERISTICS DIAGRAM
0
10
20
30
40
40
30
20
10
0
ERL vs. echo attenuation
E
ERL [dB]
Measurement Conditions
RIN input = –10 dBm 5 kHz band white noise
(0 dBm = 2.2 dBm0)
Echo delay time T
D
= 20 ms
ATT, GC, NLP = OFF
Power supply voltage 5 V
0
10
20
30
40
–50 –40 –30 –20 –10
0
RIN input level vs. echo attenuation
E
RIN input level [dBm]
0 dBm = 2.2 dBm0
Measurement Conditions
RIN input: 5 kHz band white noise
Echo delay time T
D
= 20 ms
ERL = 6 dB
ATT, GC, NLP = OFF
Power supply voltage 5 V
0
10
20
30
0
Echo delay time vs. echo attenuation
E
Echo delay time [ms]
200
150
100
50
Measurement Conditions
RIN input = –10 dBm
5 kHz band white noise
(0 dBm = 2.2 dBm0)
1
2
3
4
5
6
7chip
ERL = 6 dB
ATT, GC, NLP = OFF
The second through seventh chips
are connected in a cascade.
Power supply voltage 5 V
–10
Note:
The characteristics above are for the MSM7543 (V
DD
5 V,
m
-law interface). The
MSM7566 (V
DD
3 V,
m
-law interface) provides the same characleristics without input
and output levels. Refer to are PCM CODEC data sheet.
MSM7543
(for both transmit and receive)
0 dBm0 = 0.6007 Vrms = –2.2 dBm (600
W
)
MSM7566
(for transmit side)
0 dBm0 = 0.35 Vrms = –6.9 dBm (600
W
)
(for receive side)
0 dBm0 = 0.5 Vrms = –3.8 dBm (600
W
)
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