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ITU O.171:1997

ITU O.171:1997 Timing Jitter And Wander Measuring Equipment For Digital Systems Which Are Based On The Plesiochronous Digital Hierarchy (pdh) Defines requirements for the characteristics of the jitter and wander measuring equipment which are described below must be adhered to in order to ensure compatibility between equipment produced by di

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Table of Contents

1Scope
2References
2.1Normativereferences
2.2Bibliographicalreferences
3Definitions
4Abbreviations
5Blockdiagram
6Interfaces
6.1Electricalinterfaces
6.2Interfaceimpedances
7Testsignalsource
7.1Modulationsource
7.2Clockgenerator
7.2.1Accuracyoftheclockgenerator
7.3Testsequencegenerator
7.3.1Testsequences
7.3.2Generationerrors
8Jittermeasuringcircuit
8.1Inputsensitivityoftheelectricalinterfaces
8.2Jittermeasurementranges
8.2.1Measurementofpeak-to-peakjitter
8.2.2Selectablethreshold
8.2.3Measurementofr.m.s.jitter
8.3Measurementbandwidths
8.3.1Frequencyresponseofjittermeasuring
circuitandfilters
8.4Measurementaccuracy
8.4.1General
8.4.2Fixederror
8.4.3Erroratotherfrequencies
8.4.4Testsequencedependenterror
8.4.5Pulseshapeatthemeasurementaccesspoint
8.5Additionalfacilities
8.5.1Analogueoutput
8.5.2Referencetimingsignal
9Operatingenvironment
AppendixIGuidelinesconcerningthemeasurementofjitter
I.1Definitionsandcausesofjitter
I.2Testenvironment
I.2.1Controlledtestsequences
I.2.2Bitrate
I.2.3Pulseshapeandcablecharacteristics
I.2.4Secondarytestenvironmentparameters
I.3Glossaryoftestconfigurationfunctional
blockcomponents
I.4Jittertolerancemeasurement
I.4.1Actualtolerance
I.4.2Jittertolerancetemplatecompliance
I.5Jittertransfercharacteristicmeasurement
I.5.1Linearprocesses
I.6Outputjittermeasurement
I.6.1Livetraffic
I.6.2Controlledtestsequences
AppendixIIGuidelinesconcerningthemeasurementofwander
II.1Wandermeasurements
II.1.1Wandermeasurementconfigurations-
Generalconditions
II.1.2Synchronizedwandermeasurements
II.1.3Non-synchronizedwandermeasurements
II.2Clockstabilitymeasurements
II.3Quantitiestobemeasured
II.3.1Timedeviation
II.3.2Maximumtimeintervalerror
II.3.3Allandeviation
II.4Externalreference

Abstract

Defines requirements for the characteristics of the jitter and wander measuring equipment which are described below must be adhered to in order to ensure compatibility between equipment produced by different manufacturers.

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