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參數(shù)資料
| 型號： | T8531 |
| 元件分類： | Codec |
| 英文描述： | T8502 and T8503 Dual PCM Codecs with Filters |
| 中文描述： | T8502和T8503雙的PCM編解碼器與濾波器 |
| 文件頁數(shù)： | 28/48頁 |
| 文件大小： | 999K |
| 代理商： | T8531 |
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28
Lucent Technologies Inc.
Preliminary Data Sheet
November 2000
Codec Chip Set
T8531/T8532 Multichannel Programmable
Transmission Characteristics
(continued)
Table 14. Distortion and Group Delay
* Varies as a function of bit offset. See Appendix A.
Table 15. Crosstalk
Parameter
Symbol
STD
X
STD
R
Test Conditions
Sinusoidal test method level:
3.0 dBm0
0 dBm0
0 dBm0 single frequency input,
200 Hz
≤
f
IN
≤
3400 Hz; measure at
any other single frequency
0 dBm0 single frequency input,
200 Hz
≤
f
IN
≤
3400 Hz; measure at
any other single frequency
Transmit or receive, two frequencies
in the range (300 Hz to 3400 Hz)
f = 1600 Hz, SCK = 4.096 MHz,
bit offset = 419
f = 1600 Hz
Min
Typ
Max
Unit
Signal to Total Distortion
Transmit or Receive
C-message Weighted
Single Frequency Distortion,
Transmit
33
36
—
—
—
—
—
—
–46
dB
dB
dB
SFD
X
Single Frequency Distortion,
Receive
SFD
R
—
—
–46
dB
Intermodulation Distortion
IMD
—
–55
–41
dB
TX Group Delay, Absolute
D
XA
—
250*
300
μ
s
RX Group Delay, Absolute
D
RA
—
250
300
μ
s
Parameter
Symbol
CT
X-X
Test Conditions
f = 300 Hz to 3400 Hz,
Any channel to any channel
f = 300 Hz to 3400 Hz,
Any channel to any other channel
In-channel
f = 300 Hz to 3400 Hz,
Any channel to any other channel
In-channel
f = 300 Hz to 3400 Hz,
Any channel to any channel
Min
Typ
Max
Unit
Transmit to Transmit Crosstalk,
0 dBm0 Level
Transmit to Receive Crosstalk,
0 dBm0 Level
—
—
–75
dB
CT
X-R
—
—
—
—
–75
–50
dB
dB
Receive to Transmit Crosstalk,
0 dBm0 Level
CT
R-X
—
—
—
—
–75
–50
dB
dB
Receive to Receive Crosstalk,
0 dBm0 Level
CT
R-R
—
—
–75
dB
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