參數(shù)資料
型號(hào)： T8538B
元件分類(lèi)： Codec
英文描述： T8538B Quad Programmable Codec
中文描述： T8538B四可編程編解碼器
文件頁(yè)數(shù)： 29/44頁(yè)
文件大?。?/td> 847K
代理商： T8538B
Agere Systems Inc.
29
Preliminary Data Sheet
August 2001
T8538B Quad Programmable Codec
Electrical Characteristics
(continued)
Distortion and Group Delay
Table 11. Distortion and Group Delay
* Absolute group delay is a function of time-slot assignment, and the maximum in this table refers to the optimal (minimum group delay) time-
slot assignment.
Parameter
Symbol
STD
X
STD
R
Test Conditions
Sinusoidal test method level:
μ
-law
30 dBm0 to +3 dBm0
A-law
30 dBm0 to +3 dBm0
μ
-law
40 dBm0 to
30 dBm0
A-law
40 dBm0 to
30 dBm0
μ
-law
45 dBm0 to
40 dBm0
A-law
45 dBm0 to
40 dBm0
0 dBm0 single frequency input,
200 Hz <
f
IN
< 3400 Hz; measured
at any other single frequency.
0 dBm0 single frequency input,
200 Hz <
f
IN
< 3400 Hz; measured
at any other single frequency.
Transmit or receive, two
frequencies in the range of
300 Hz to 3400 Hz.
f = 1600 Hz, 600
resistive termination.
f = 1600 Hz, 600
resistive termination
Min
Typ
Max
Unit
Signal to Total Distortion,
Transmit or Receive
36
35
31
30
27
25
—
—
—
—
—
—
—
—
—
—
—
—
—
—
46
dB
dB
dB
dB
dB
dB
dB
Single Frequency Distortion,
Transmit
SFD
X
Single Frequency Distortion,
Receive
SFD
R
—
—
46
dB
Intermodulation Distortion
IMD
—
55
49
dB
TX Group Delay, Absolute*
D
XA
—
—
475
μ
s
RX Group Delay, Absolute*
D
RA
—
—
235
μ
s
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