XRT75L00D Datasheet, PDF (75/92 Pages) Exar Corporation – E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

REV. 1.0.2
XRT75L00D
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
FIGURE 49. ILLUSTRATION OF BURST OF POINTER ADJUSTMENT SCENARIO
Pointer Adjustment Events
Pointer Adjustment Burst Train
0.5ms
t
0.5ms
>30s
Initialization
Cool Down
Measurement Period
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 "Burst of Pointer Adjustment" scenario, must NOT exceed 1.3UI-pp.
9.5.4 Phase Transients
Figure 50 presents an illustration of the "Phase Transients" Pointer Adjustment Scenario per Telcordia GR-
253-CORE.
FIGURE 50. ILLUSTRATION OF "PHASE-TRANSIENT" POINTER ADJUSTMENT SCENARIO
Pointer Adjustment Events
Pointer Adjustment Burst Train
0.5s
0.25s
0.25s
t
>30s
Initialization
Cool Down
Measurement Period
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 "Phase Transient - Pointer Adjustment" scenario must NOT exceed
1.2UI-pp.
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