XRT75VL00D_08 Datasheet, PDF (80/92 Pages) Exar Corporation – E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET

XRT75VL00D
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
REV. 1.0.4
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 56.
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.
9.6 A Review of the DS3 Wander Requirements per ANSI T1.105.03b-1997.
To be provided in the next revision of this data sheet.
9.7 A Review of the Intrinsic Jitter and Wander Capabilities of the LIU in a typical system
application
The Intrinsic Jitter and Wander Test results are summarized in this section.
9.7.1 Intrinsic Jitter Test results
The Intrinsic Jitter Test results for the LIU in DS3 being de-mapped from SONET is summarized below in Table
2.
TABLE 19: SUMMARY OF "CATEGORY I INTRINSIC JITTER TEST RESULTS" FOR SONET/DS3 APPLICATIONS
SCENARIO
DESCRIPTION
DS3 De-Mapping
Jitter
Single Pointer
Adjustment
Pointer Bursts
Phase Transients
87-3 Pattern
87-3 Add
87-3 Cancel
Continuous
Pattern
Continuous Add
Continuous
Cancel
SCENARIO
NUMBER
A1
A2
A3
A4
A5
A5
A4
A5
A5
LIU
INTRINSIC JITTER TEST RESULTS
0.13UI-pp
0.201UI-pp
0.582UI-pp
0.526UI-pp
0.790UI-pp
0.926UI-pp
0.885UI-pp
0.497UI-pp
0.598UI-pp
0.589UI-pp
TELCORDIA GR-253-CORE CATEGORY I
INTRINSIC JITTER REQUIREMENTS
0.4UI-pp
0.43UI-pp (e.g. 0.13UI-pp + 0.3UI-pp)
1.3UI-pp
1.2UI-pp
1.0UI-pp
1.3UI-pp
1.3UI-pp
1.0UI-pp
1.3UI-pp
1.3UI-pp
NOTES:
1. A detailed test report on our Test Procedures and Test Results is available and can be obtained by contacting your
Exar Sales Representative.
2. These test results were obtained via the LIUs mounted on our XRT94L43 12-Channel DS3/E3/STS-1 Mapper
Evaluation Board.
3. These same results apply to SDH/AU-3 Mapping applications.
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