XRT75VL00D datasheet(80/92 Pages) EXAR

80 / 92 page

XRT75VL00D

E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

REV. 1.0.3

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

NOTES:

A detailed test report on our Test Procedures and Test Results is available and can be obtained by contacting your

Exar Sales Representative.

These test results were obtained via the LIUs mounted on our XRT94L43 12-Channel DS3/E3/STS-1 Mapper

Evaluation Board.

These same results apply to SDH/AU-3 Mapping applications.

TABLE 19: SUMMARY OF "CATEGORY I INTRINSIC JITTER TEST RESULTS" FOR SONET/DS3 APPLICATIONS

SCENARIO

DESCRIPTION

SCENARIO

NUMBER

LIU

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

Adjustment

0.201UI-pp

0.43UI-pp (e.g. 0.13UI-pp + 0.3UI-pp)

Pointer Bursts

0.582UI-pp

1.3UI-pp

Phase Transients

0.526UI-pp

1.2UI-pp

87-3 Pattern

0.790UI-pp

1.0UI-pp

87-3 Add

0.926UI-pp

1.3UI-pp

87-3 Cancel

0.885UI-pp

1.3UI-pp

Continuous

Pattern

0.497UI-pp

1.0UI-pp

Continuous Add

0.598UI-pp

1.3UI-pp

Continuous

Cancel

0.589UI-pp

1.3UI-pp

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