參數(shù)資料
型號(hào): XRT73L04B
廠商: Exar Corporation
英文描述: 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
中文描述: 4通道DS3/E3/STS-1線路接口單元
文件頁(yè)數(shù): 35/64頁(yè)
文件大?。?/td> 359K
代理商: XRT73L04B
XRT73L04B
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.1
31
a. Operating in the HOST Mode.
When the XRT73L04B 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 Chan-
nel(n) by setting the
(SR/DR)_(n)
bit-field within Com-
mand Register (CR3-(n)) to "1" as illustrated below.
N
OTE
:
This method can only be used if the XRT73L04B 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
TxLEV_(n) bit-field to “High”or "Low". The purpose of
the Transmit Line Build-Out circuit is to permit config-
uration 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 spec-
ifications state that the cable length between the
Transmit Output and the Digital Cross Connect sys-
tem can range anywhere from 0 to 450 feet.
The Isolated DSX-3 Pulse Template Requirement per
Bellcore GR-499-CORE is illustrated in Figure 19 and
the Isolated STSX-1 Pulse Template Requirement
per Bellcore GR-253-CORE is illustrated in Figure 20.
COMMAND REGISTER CR3-(n)
D4
D3
D2
D1
D0
(SR/DR)_(n)
LOSMUT_(n)
RxOFF
RxClk_(n)INV
Reserved
1
X
X
X
X
F
IGURE
19. T
HE
B
ELLCORE
GR-499-CORE T
RANSMIT
O
UTPUT
P
ULSE
T
EMPLATE
FOR
DS3 A
PPLICATIONS
DS3 Pulse Template
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
-1
-09
-08
-07
-06
-05
-04
-03
-02
-01
0
01
02
03
04
05
06
07
08
09
1
11
12
13
14
Time, in UI
N
Lower Curve
Upper Curve
相關(guān)PDF資料
PDF描述
XRT73L04BIV 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L04 4 Channel E3/DS3/STS-1 Line Interface Unit(4通道 E3/DS3/STS-1線接口單元)
XRT73L06 SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L06IB SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73LC00A E3/DS3/STS-1 LINE INTERFACE UNIT
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