XRT75R03D_06 Datasheet, PDF (122/135 Pages) Exar Corporation – EXAR DATA SHEET FORMAT TEMPLATES

XRT75R03D
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER
REV. 1.0.4
FIGURE 57. ILLUSTRATION OF CONTINUOUS-CANCEL POINTER ADJUSTMENT SCENARIO
Continuous Pointer Adjustments
T
Cancelled
Pointer Adjustment
Telcordia GR-253-CORE defines a "Continuous Cancel" Pointer Adjustment, as the "Continuous" Pointer
Adjustment pattern, with an additional pointer adjustment cancelled (or not executed), as shown above in
Figure 57.
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 Cancel" pattern of Pointer Adjustments, must not
exceed 1.3UI-pp.
10.6 A Review of the DS3 Wander Requirements per ANSI T1.105.03b-1997.
To be provided in the next revision of this data sheet.
10.7 A Review of the Intrinsic Jitter and Wander Capabilities of the XRT75R03D in a typical system
application
The Intrinsic Jitter and Wander Test results are summarized in this section.
10.7.1 Intrinsic Jitter Test results
The Intrinsic Jitter Test results for the XRT75R03D in DS3 being de-mapped from SONET is summarized
below in Table 2.
TABLE 32: SUMMARY OF "CATEGORY I INTRINSIC JITTER TEST RESULTS" FOR SONET/DS3 APPLICATIONS
SCENARIO
DESCRIPTION
SCENARIO
NUMBER
XRT75R03D
INTRINSIC JITTER TEST RESULTS
TELCORDIA GR-253-CORE CATEGORY I
INTRINSIC JITTER REQUIREMENTS
DS3 De-Mapping
Jitter
0.13UI-pp
0.4UI-pp
Single Pointer
A1
Adjustment
0.201UI-pp
0.43UI-pp (e.g. 0.13UI-pp + 0.3UI-pp)
Pointer Bursts
A2
0.582UI-pp
1.3UI-pp
Phase Transients
A3
0.526UI-pp
1.2UI-pp
118