XRT75R03D_06 Datasheet, PDF (117/135 Pages) Exar Corporation – EXAR DATA SHEET FORMAT TEMPLATES

XRT75R03D
REV. 1.0.4
THREE CHANNEL E3/DS3/STS-1 LINE
2. Testing must be performed for both Incrementing and Decrementing Pointer Adjustments.
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.
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