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參數(shù)資料
| 型號： | T8534 |
| 英文描述： | T8533/34 Quad Programmable Line Card Signal Processor |
| 中文描述： | T8533/34四線卡可編程信號處理器 |
| 文件頁數(shù)： | 42/48頁 |
| 文件大?。?/td> | 890K |
| 代理商： | T8534 |
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Preliminary Data Sheet
July 2001
Signal Processor
T8533/34 Quad Programmable Line Card
42
Agere Systems Inc.
Software Interface
(continued)
Table 18. Control Bit Definitions
(continued)
Control Name
(Address, Decimal)
[Address, Hex]
CTZCTRL
(140—143)
[0x8c
—0x8f]
LMSCTRL
(144)
[0x90]
RECCTRL
(145)
[0x91]
Bit
Assignments
Function
0—30
Coefficients for the CTZ termination bleed. Defaults to 0x07ed0000.
3—7
0—2
Load as 0s.
Leak coefficient for LMS adaptation algorithm. Defaults to 1.
5—7
4
3
0—2
Load as 0s.
Noise match enable (comfort noise). Defaults to 0 (disabled).
Enable residual echo control. Defaults to 0 (disabled).
Residual echo control sensitivity factor.
Defaults to 0.
Bit Number
2
1
Function
(dB)
(Threshold =)
0.0
3.5
6.0
9.5
12.0
15.5
18.0
21.6
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
SDCTRL
(146)
[0x92]
7
6
Load as 0.
Enable
analog loopback
. Defaults to 0 (no loopback).
RTZ gain. Defaults to 3 (equal level point value of 3 * 0.075 = 0.225).
Transmit analog gain (XAG). Defaults to 1
(6 dB) gain.
3—5
0—2
Bit Number
2
1
0
0
0
0
0
1
0
1
1
0
Function
(dB)
0.0
6.02
12.04
18.06
24.08
0
0
1
0
1
0
SDTSI
(147)
[0x93]
7
6
Load as 0.
Digital loopback, loopback from receive to transmit at the sigma-delta
converters (
digital loopback 2
). Defaults to 0 (no loopback).
Digital channel feeding this analog receive channel. Defaults to channel
number.
Send idle channel code (alternating bits) to this analog receive path.
Defaults to 0 (do not send idle channel code).
Loopback from transmit to receive at the sigma-delta converters (
digital
loopback 3
). Defaults to 0 (no loopback).
Analog channel feeding this digital channel in the transmit direction.
Defaults to channel number.
Gain control for gain transfer stage in transmit direction. Defaults to
0x0400 (0 dB). This is a 12-bit multiply operation with a maximum gain of
4 (12 dB).
4—5
3
2
0—1
GTX2
(148—149)
[0x94
—0x95]
0—11
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