參數(shù)資料
型號: XRT73R12IB
廠商: Exar Corporation
文件頁數(shù): 20/89頁
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 12CH 420TBGA
標(biāo)準包裝: 40
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 12/12
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 420-LBGA 裸露焊盤
供應(yīng)商設(shè)備封裝: 420-TBGA(35x35)
包裝: 托盤
XRT73R12
24
REV. 1.0.3
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
3.5.4
Interference Tolerance
For E3 mode, ITU-T G.703 Recommendation specifies that the receiver be able to recover error free clock and
data in the presence of a sinusoidal interfering tone signal. For DS3 and STS-1 modes, the same
recommendation is being used. Figure 10 shows the configuration to test the interference margin for DS3/
STS1. Figure 11 shows the set up for E3.
FIGURE 9. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775.
FIGURE 10. INTERFERENCE MARGIN TEST SET UP FOR DS3/STS-1
FIGURE 11. INTERFERENCE MARGIN TEST SET UP FOR E3.
Actual Occurrence
of LOS Condition
Line Signal
is Restored
Time Range for
LOS Declaration
Time Range for
LOS Clearance
G.775
Compliance
G.775
Compliance
0 UI
10 UI
0 UI
10 UI
255 UI
RTIP/
RRing
RLOS Output Pin
Sine Wave
Generator
Pattern Generator
2 23 -1 PRBS
N
S
Attenuator
Test
Equipment
DUT
XRT73R12
DS3 = 22.368 MHz
STS-1 = 25.92 MHz
Cable Simulator
Attenuator 1
N
S
Sine Wave
Generator
17.184mHz
Signal Source
223-1 PRBS
Attenuator 2
Test
Equipment
DUT
XRT73R12
Cable Simulator
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