XRT75R03D Datasheet, PDF (117/134 Pages) Exar Corporation – THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER

XRT75R03D
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER REV. 1.0.2
10.5.3 Pointer Burst
Figure 50 presents an illustration of the "Pointer Burst" Pointer Adjustment Scenario per Telcordia GR-253-
CORE.
FIGURE 50. 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.
10.5.4 Phase Transients
Figure 51 presents an illustration of the "Phase Transients" Pointer Adjustment Scenario per Telcordia GR-
253-CORE.
FIGURE 51. 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
112