參數(shù)資料
型號(hào): T8531A
元件分類: Codec
英文描述: T8531A/8532 Multichannel Programmable Codec Chip Set
中文描述: T8531A/8532多通道可編程解碼器芯片組
文件頁(yè)數(shù): 28/50頁(yè)
文件大?。?/td> 888K
代理商: T8531A
28
Agere Systems Inc.
Preliminary Data Sheet
September 2001
Codec Chip Set
T8531A/T8532 Multichannel Programmable
Transmission Characteristics
(continued)
Table 13. Noise (per Channel)
* Measured with a –50 dBm0 activation signal applied to VF
X
I input of channel under test.
Parameter
Symbol
N
XC
Test Conditions
0 dB transmit gain
Min
Typ
Max
18
Unit
dBrnC0
Transmit Noise,
C-message Weighted
Transmit Noise,
P-message Weighted
Receive Noise,
C-message Weighted
Receive Noise,
P-message Weighted
Noise, Single Frequency
N
XP
0 dB transmit gain
–68
dBm0p
N
RC
0 dB receive gain, digital pattern corre-
sponding to idle PCM code,
μ
-law
0 dB receive gain, digital pattern corre-
sponding to idle PCM code, A-law
f = 0 kHz to 100 kHz, loop around measure-
ment, VTX = 0 Vrms
V
DD
= 5.0 Vdc + 100 mVrms
f = 0 kHz to 4 kHz
f = 4 kHz to 50 kHz*
C-message weighted
Measured on VRP
V
DD
= 5.0 Vdc + 100 mVrms
f = 0 kHz to 4 kHz
f = 4 kHz to 25 kHz
f = 25 kHz to 50 kHz
Digital pattern corresponding to idle PCM
code,
μ
-law, C-message weighted
0 dBm0, 300 Hz to 3400 Hz input
oversampled data code applied at OSDR0
(or OSDR1):
4600 Hz to 7600 Hz
7600 Hz to 8400 Hz
8400 Hz to 50 kHz
13
dBrnC0
N
RP
–75
dBm0p
N
RS
–53
dBm0
Power Supply Rejection,
Transmit
PSR
X
36
30
dBC
dBC
Power Supply Rejection,
Receive
PSR
R
36
40
36
dBC
dBC
dBC
Spurious Out-of-band
Signals at the Channel
Outputs
SOS
–30
–40
–30
dB
dB
dB
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