參數(shù)資料
型號: XRT75R12DIB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
中文描述: DATACOM, PCM TRANSCEIVER, PBGA420
封裝: 35 X 35 MM, TBGA-420
文件頁數(shù): 116/131頁
文件大小: 717K
代理商: XRT75R12DIB
XRT75R12D
REV. P1.0.1
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
PRELIMINARY
111
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.
F
IGURE
61. I
LLUSTRATION
OF
C
ONTINUOUS
P
ERIODIC
P
OINTER
A
DJUSTMENT
S
CENARIO
Initialization
Measurement Period
Repeating Continuous Pattern (see below)
Pointer Adjustment Events
T
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