參數(shù)資料
型號(hào)： XRT73L04
廠(chǎng)商： Exar Corporation
英文描述： 4 Channel E3/DS3/STS-1 Line Interface Unit(4通道 E3/DS3/STS-1線(xiàn)接口單元)
中文描述： 4頻道E3/DS3/STS-1線(xiàn)路接口單元（4通道E3/DS3/STS-1線(xiàn)接口單元）
文件頁(yè)數(shù)： 33/62頁(yè)
文件大?。?/td> 781K
代理商： XRT73L04
á
XRT73L04
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
PRELIMINARY
REV. P1.0.5
29
2.3.3
The XRT73L04 HDB3/B3ZS Encoder can be disabled
by two methods.
a. Operating in the Hardware Mode.
The HBD3/B3ZS Encoder blocks within all channels
are disabled by setting the CS/(SR/DR) input pin to
"0".
Disabling the HDB3/B3ZS Encoder
N
OTE
:
By executing this step the HDB3/B3ZS Encoder and
Decoder blocks in all channels of the XRT73L04 are glo-
bally disabled.
a. Operating in the HOST Mode.
When the XRT73L04 is operating in the HOST Mode,
then the HDB3/B3ZS Encoders within each channel
can be individually enabled or disabled. Disable the
HDB3/B3ZS Encoder block within Channel(n) by set-
ting the
(SR/DR)_(n)
bit-field within Command Regis-
ter (CR3-(n)) to "1" as illustrated below.
COMMAND REGISTER CR3-(N)
N
OTE
:
This method can only be used if the XRT73L04 is
operating in the HOST Mode.
If either of these methods are used to disable the
HDB3/B3ZS Encoder, then the LIU transmits the data
as received via the TPData(n) and TNData(n) input
pins.
2.4
T
HE
T
RANSMIT
P
ULSE
S
HAPING
C
IRCUITRY
The Transmit Pulse Shaper Circuitry consists of a
Transmit Line Build-Out circuit which can be enabled
or disabled by setting the TxLEV(n) input pin or Tx-
LEV(n) bit-field to “High”or "Low". The purpose of the
Transmit Line Build-Out circuit is to permit configura-
tion of each channel to transmit an output pulse which
is compliant to either of the following pulse template
requirements when measured at the Digital Cross
Connect System. Each of these Bellcore specifica-
tions state that the cable length between the Transmit
Output and the Digital Cross Connect system can
range anywhere from 0 to 450 feet.
The Isolated DSX-3 Pulse Template Requirement per
Bellcore GR-499-CORE is illustrated in Figure 16 and
the Isolated STSX-1 Pulse Template Requirement
per Bellcore GR-253-CORE is illustrated in Figure 17.
F
IGURE
15. A
N
E
XAMPLE
OF
HDB3 E
NCODING
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
1
0
0
0
0
0
0
0
B
0
V
0
0
V
Line Signal
TxClk
TNData
TPData
Data
0
0
D4
D3
D2
D1
D0
(SR/DR)_(n)
LOSMUT(n)
RxOFF
RxClk(n)INV
Reserved
1
X
X
X
X
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT73L04A 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L04AIV 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L04B 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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XRT73L04BIV 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
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