参数资料
型号: XRT75R12DIB-L
厂商: Exar Corporation
文件页数: 21/133页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 12CH 420TBGA
标准包装: 40
类型: 线路接口装置(LIU)
驱动器/接收器数: 12/12
规程: DS3,E3,STS-1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 420-LBGA 裸露焊盘
供应商设备封装: 420-TBGA(35x35)
包装: 托盘
XRT75R12D
113
REV. 1.0.3
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
Telcordia GR-253-CORE defines an "87-3 Cancel" Pointer Adjustment, as the "87-3 Continuous" Pointer
Adjustment pattern, with an additional pointer adjustment cancelled (or not executed), as shown above in
Figure 60.
Telcordia GR-253-CORE mandates that the Intrinsic Jitter, within the DS3 signal that is de-mapped from a
SONET signal, which is experiencing the "87-3 Cancel" pattern of Pointer Adjustments, must not exceed 1.3UI-
pp.
8.5.8
Continuous Pattern
Figure 61 presents an illustration of the "Continuous" Pointer Adjustment Scenario per Telcordia GR-253-
CORE.
Telcordia GR-253-CORE mandates that the Intrinsic Jitter, within the DS3 signal that is de-mapped from a
SONET signal, which is experiencing the "Continuous" pattern of Pointer Adjustments, must not exceed 1.0UI-
pp. The spacing between individual pointer adjustments (within this scenario) can range from 7.5ms to 10s.
8.5.9
Continuous Add
Figure 62 presents an illustration of the "Continuous Add Pattern" Pointer Adjustment Scenario per Telcordia
GR-253-CORE.
FIGURE 61. ILLUSTRATION OF CONTINUOUS PERIODIC POINTER ADJUSTMENT SCENARIO
Initialization
Measurement Period
Repeating Continuous Pattern (see below)
Pointer Adjustment Events
T
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