參數(shù)資料
型號(hào): XRT75R06DIB-F
廠商: Exar Corporation
文件頁數(shù): 25/105頁
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 6CH 217BGA
標(biāo)準(zhǔn)包裝: 126
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 6/6
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: 217-BBGA
供應(yīng)商設(shè)備封裝: 217-BGA(23x23)
包裝: 托盤
XRT75R06D
á
REV. 1.0.0
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
21
3.5.3
E3 LOS Condition:
If the level of incoming line signal drops below the threshold as described in the ITU-T G.775 standard, the
LOS condition is detected. Loss of signal is defined as no transitions for 10 to 255 consecutive zeros. No
transitions is defined as a signal level between 15 and 35 dB below the normal. This is illustrated in Figure 9.
The LOS condition is cleared within 10 to 255 UI after restoration of the incoming line signal. Figure 10 shows
the LOS declaration and clearance conditions.
FIGURE 9. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775
FIGURE 10. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775.
0 dB
-12 dB
-15dB
-35dB
Maximum Cable Loss for E3
LOS Signal Must be Declared
LOS Signal Must be Cleared
LOS Signal may be Cleared or Declared
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
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