參數(shù)資料
型號： XRT75R12D
廠商： Exar Corporation
英文描述： TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
中文描述： 第十二章通道E3/DS3/STS-1線路接口單元與SONET DESYNCHRONIZER
文件頁數(shù)： 76/131頁
文件大?。?/td> 717K
代理商： XRT75R12D
XRT75R12D
REV. P1.0.1
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
PRELIMINARY
71
5
Digital LOS Defect
Declared
R/O
Digital LOS Defect Declared:
This READ-ONLY bit-field indicates whether or not the Digital LOS
(Loss of Signal) detector is declaring the LOS Defect condition.
For DS3 and STS-1 applications, the Digital LOS Detector will declare
the LOS Defect condition whenever it detects an absence of pulses
(within the incoming DS3 or STS-1 data-stream) for 160 consecutive
bit-periods.
Further, (again for DS3 and STS-1 applications) the Digital LOS Detec-
tor will clear the LOS Defect condition whenever it determines that the
pulse density (within the incoming DS3 or STS-1 signal) is at least
33%.
0 - Indicates that the Digital LOS Detector is NOT declaring the LOS
Defect Condition.
1 - Indicates that the Digital LOS Detector is currently declaring the
LOS Defect condition.
N
OTES
:
1.
LOS Detection (within each channel of the XRT75R12D) is
performed by both an Analog LOS Detector and a Digital LOS
Detector. The LOS state of a given Channel is simply a
WIRED-OR of the LOS Defect Declare states of these two
detectors.
2.
The current LOS Defect Condition (for the channel) can be
determined by reading out the contents of Bit 1 (Receive LOS
Defect Declared) within this register.
4
Analog LOS Defect
Declared
R/O
Analog LOS Defect Declared:
This READ-ONLY bit-field indicates whether or not the Analog LOS
(Loss of Signal) detector is declaring the LOS Defect condition.
For DS3 and STS-1 applications, the Analog LOS Detector will declare
the LOS Defect condition whenever it determines that the amplitude of
the pulses (within the incoming DS3/STS-1 line signal) drops below a
certain Analog LOS Defect Declaration threshold level.
Conversely, (again for DS3 and STS-1 applications) the Analog LOS
Detector will clear the LOS Defect condition whenever it determines
that the amplitude of the pulses (within the incoming DS3/STS-1 line
signal) has risen above a certain Analog LOS Defect Clearance
threshold level.
It should be noted that, in order to prevent "chattering" within the Ana-
log LOS Detector output, there is some built-in hysteresis between the
Analog LOS Defect Declaration and the Analog LOS Defect Clearance
threshold levels.
0 - Indicates that the Analog LOS Detector is NOT declaring the LOS
Defect Condition.
1 - Indicates that the Analog LOS Detector is currently declaring the
LOS Defect condition.
N
OTES
:
1.
LOS Detection (within each channel of the XRT75R12D) is
performed by both an Analog LOS Detector and a Digital LOS
Detector. The LOS state of a given Channel is simply a
WIRED-OR of the LOS Defect Declare states of these two
detectors.
2.
The current LOS Defect Condition (for the channel) can be
determined by reading out the contents of Bit 1 (Receive LOS
Defect Declared) within this register.
B
IT
N
UMBER
N
AME
T
YPE
D
ESCRIPTION
相關(guān)PDF資料
PDF描述
XRT75R12DIB TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75R12 TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75R12IB TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75VL00 E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75VL00IV E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT75R12D_06 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET
XRT75R12D_07 制造商:EXAR 制造商全稱:EXAR 功能描述:TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET
XRT75R12DES 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT75R12DIB 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 12CH E3/DS3/STS W/JITTER R3 TECH RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT75R12DIB-F 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 12 Channel 3.3V-5V temp -45 to 85C RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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