Jitter Jitter ExperimentExperiment

Midterm presentationMidterm presentation

Performed byPerformed byGreenberg OlegGreenberg OlegHahamovich EvgenyHahamovich Evgeny

Spring 2008

Supervised by

Mony Orbah

AgendaAgenda

ObjectiveObjective Exp. environmentExp. environment Accomplished TasksAccomplished Tasks Topics to be coveredTopics to be covered Implementation difficultiesImplementation difficulties Time TableTime Table

ObjectiveObjective

Creating an experiment environment, which will Creating an experiment environment, which will include theoretical introduction and practical include theoretical introduction and practical exposure to the jitter subject, allowing the exposure to the jitter subject, allowing the student to investigate and get familiar with Jitter student to investigate and get familiar with Jitter types, components and sourcestypes, components and sources

Experiment EnvironmentExperiment Environment

Tabor Arbitrary Waveform Generetor 2571aMaximum frequency 100 MHzSampling Rate 250 MS/s

Ability to create different Modulation types

Agilent Oscilloscope MS08104ABandwidth 1 GHzSample Rate 4 GS/sCustomization Package,

Jitter and Timing Analysis

Jitter created by FM

Accomplished TasksAccomplished Tasks Eye diagramEye diagram

comparing between eye diagram of a clean signal vs. “noisy” comparing between eye diagram of a clean signal vs. “noisy” (modulated) signal(modulated) signal

Unmodulated signalUnmodulated signal FM modulated signalFM modulated signal

Accomplished TasksAccomplished Tasks HistogramHistogram

- Histograms for different wave shapes- Histograms for different wave shapes

- Histograms for different jitter measurement types- Histograms for different jitter measurement types

Sin wave histogramSin wave histogram TIE histogram for FM TIE histogram for FM modulation by a sin wavemodulation by a sin wave

Accomplished TasksAccomplished Tasks

Relation between different jitter measurement Relation between different jitter measurement typestypes

- Visualization of diff-int relation between jitter measurement types- Visualization of diff-int relation between jitter measurement types

- Calculating ratio of Std Dev for different jitter measurement types- Calculating ratio of Std Dev for different jitter measurement types

TIE jitter trendTIE jitter trend

Modulation by Square wave Modulation by Square wave

t

C2C jitter trendC2C jitter trend

Period jitter trendPeriod jitter trend

t

Std Dev CalculationStd Dev Calculation

2 40.873 31.2521.732 3 1.324 223.604 23.604

0.03% 6.4%

C C TIE

Period Period

Difference Difference

Topics to be coveredTopics to be covered DCD DCD

create and measure for different waveformscreate and measure for different waveforms(tabor)(tabor) Bathtub curve Bathtub curve

theory and relation to eye diagram, BER explanation, theory and relation to eye diagram, BER explanation, extrapolation theoryextrapolation theory

(ezjit+)(ezjit+) Methods for jitter separation Methods for jitter separation

- Dual Dirac model + tail fit method- Dual Dirac model + tail fit method- Furrier transport- Furrier transport

(ezjit+)(ezjit+)

Implementation difficultiesImplementation difficulties

Time TableTime Table Implementing the uncovered parts of the experimentImplementing the uncovered parts of the experiment

- DCD implementation option check- DCD implementation option check ½ week½ week- Bathtub curve- Bathtub curve 1 week1 week- Jitter separation methods- Jitter separation methods 1 week1 week

2 weeks2 weeks

Writing detailed documentation including step by step Writing detailed documentation including step by step guidance to scope setup and measurement theoryguidance to scope setup and measurement theory

2 weeks2 weeks

Preparing final presentationPreparing final presentation1 week1 week

Estimated deadline - mid. OctoberEstimated deadline - mid. October

QuestionsQuestions