參數(shù)資料
型號(hào): XRT83SH38
廠商: Exar Corporation
英文描述: 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: 8通道的T1/E1/J1短途線路接口單元
文件頁數(shù): 57/78頁
文件大小: 606K
代理商: XRT83SH38
XRT83SH38
54
REV. 1.0.7
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
T
ABLE
23: E
QUALIZER
C
ONTROL
AND
T
RANSMIT
L
INE
B
UILD
O
UT
EQC[4:0]
T1/E1 M
ODE
/R
ECEIVE
S
ENSITIVITY
T
RANSMIT
LBO
C
ABLE
C
ODING
0x08h
T1 Short Haul/15dB
0 to 133 feet (0.6dB)
100
TP
B8ZS
0x09h
T1 Short Haul/15dB
133 to 266 feet (1.2dB)
100
TP
B8ZS
0x0Ah
T1 Short Haul/15dB
266 to 399 feet (1.8dB)
100
TP
B8ZS
0x0Bh
T1 Short Haul/15dB
399 to 533 feet (2.4dB)
100
TP
B8ZS
0x0Ch
T1 Short Haul/15dB
533 to 655 feet (3.0dB)
100
TP
B8ZS
0x0Dh
T1 Short Haul/15dB
Arbitrary Pulse
100
TP
B8ZS
0x1Ch
E1 Short Haul/15dB
ITU G.703
75
Coax
HDB3
0x1Dh
E1 Short Haul/15dB
ITU G.703
120
TP
HDB3
T
ABLE
24: M
ICROPROCESSOR
R
EGISTER
0
X
01
H
B
IT
D
ESCRIPTION
C
HANNEL
0-7 (0
X
01
H
-0
X
71
H
)
B
IT
N
AME
F
UNCTION
Register
Type
Default
Value
(HW reset)
D7
RxTSEL
Receive Termination Select
Upon power up, the receiver is in "High" impedance. RxTSEL is
used to switch between the internal termination and "High" imped-
ance.
0 = "High" Impedance
1 = Internal Termination
R/W
0
D6
TxTSEL
Transmit Termination Select
Upon power up, the transmitter is in "High" impedance. TxTSEL is
used to switch between the internal termination and "High" imped-
ance.
0 = "High" Impedance
1 = Internal Termination
R/W
0
D5
D4
TERSEL1
TERSEL0
Receive Line Impedance Select
TERSEL[1:0] are used to select the line impedance for T1/J1/E1.
00 = 100
01 = 110
10 = 75
11 = 120
R/W
0
0
D[3:2]
JASEL[1:0]
Jitter Attenuator Select
JASEL[1:0] are used to select the jitter attenuator in the transmit or
receive path.
00 = Disabled
01 = Transmit Path
10 = Receive Path
11 = Receive Path
R/W
0
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