Tektronix TDSUSB2 Primary User

Download

TDSUSB2

ZZZ

Universal Serial Bus Measurements Package

Online Help

*P077001507*

077-0015-07

TDSUSB2 Universal Serial Bus Measurements Package

ZZZ

Online Help

www.tektronix.com

077-0015-07

Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Speciﬁcations and price change privileges reserved.

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

Contacting Tektronix

Tektronix, Inc. 14150 SW Karl Braun Drive P. O . B o x 5 0 0 Beaverton, OR 97077 USA

For p roduct information, sales, service, and technical support:

In North America, call 1-800-833-9200. Worldwide, visit www.tektronix.com to ﬁnd contacts in your area.

Table of Contents

General Safety Summary

General Safety Summary .......................................................................................... 1

Introduction

Welcome to the TDSUSB2 Universal Serial Bus Measurements Package................................... 3

Online He

Printing from the Online Help..................................................................................... 5

Conventions.......... ................................ ................................ ............................... 5

Related Documentation ............................... ................................ ............................. 6

Feedback.................. ................................ .................................. ......................... 7

Getting Started

Introduction and Product Description ... ................................ ................................ ......... 9

Compatibility... . . .... ..... .... . .... ..... .... . .... ..... .... . .... ..... .... . .... ... . . .... . .... .... . .... . .... .... . .... . 10

Requirements and Restrictions................................................................................... 10

Accessories............................... .................................. ................................ ........ 10

Installation

Deskewing

lp and Related Documentation ......... ................................ ............................... 4

Setting up the Instrument to Take Measurements ... . .... ... . . .... . .... ..... .... . .... . .... .... . .... . .... .. 12

Installing the Application ... ..... .... . .... . .... .... . .... . .... ... . . .... . .... ..... .... . .... . .... ..... .... . .... . 12

Deskewing the Probes and Channels ............... ................................ ........................ 12

Deskewing Probes and Channels on the supported Instruments......................................... 13

Table of Contents

Operating Basics

About Basic Operations

About Basic Operations.............. .................................. ................................ ...... 19

Application Interface ......................................................................................... 19

Application Interface Menu Controls....................................................................... 20

Basic Instrument Functions

Using Basic Oscilloscope Functions.. . .... . .... . .... . .... ..... ..... .... . .... . .... . .... . .... ..... ..... .... . . 21

Minimizing and Maximizing the Application ................... .................................. ........ 21

Application Directories and File Names . ................................ .................................. 22

File Name Extensions ............ ................................ .................................. .......... 22

Returning to the Application ................................................................................ 23

Exiting the Application.... . .... .... . .... . .... ..... ... . . .... . .... . .... .... . .... . .... ..... .... . .... . .... . .... .. 23

Setting up the Software to take Measurements

Description of the Test Fixture .............................................................................. 23

Setting Up the Device Details .. . .... ... . . .... . .... .... . .... . .... .... . .... . .... .... . .... . .... .... . .... . .... .. 24

TDSUSB2 Universal Serial Bus Measurements Package i

Table of Contents

Setting Up the Software ..... ... . . .... . .... . .... ..... ..... .... . .... . .... ..... ..... .... . .... . .... . .... . .... .... 25

Setting Preferences . .... . .... ..... .... . .... . .... ... . . .... . .... . .... ..... .... . .... . .... ... . . .... . .... . .... ..... 25

Table of Measurements and Options...................... .................................. ................ 28

Selecting a Measurement ...................... ................................ .............................. 30

Signal Quality Check... . .... . .... ..... ... . . .... . .... . .... ..... ..... .... . .... . .... ..... ..... .... . .... . .... . ... 32

Inrush Current Check....... ................................ ................................ .................. 33

Droop Measurement.......................................................................................... 34

Receiver Sensitivity Measurement.......................................................................... 35

Chirp Measurement........................................................................................... 36

Monotonic Property .......................................................................................... 37

Conﬁguring a Measurement ................................................................................. 38

Conﬁgure Limits........ ................................ ................................ ...................... 38

Conﬁguring Signal Quality Measurements .... . .... . .... ... . . .... . .... ..... .... . .... . .... ..... .... . .... . .. 39

Conﬁguring Inrush Current Measurements ............ .................................. .................. 40

Conﬁguring Droop Measurements.......................................................................... 40

Conﬁguring Receiver Sensitivity Measurements.. ..... ... . . .... . .... . .... ... . . .... . .... . .... . .... .... . ... 41

Conﬁguring Chirp Measurement.. ................................ ................................ .......... 42

Conﬁguring Resume Measurement......................................................................... 44

Conﬁguring Suspend Measurement ........................................................................ 45

Conﬁguring Reset from Suspend Measurement ........................... ................................ 46

Conﬁguring Packet Parameter Measurement .............................................................. 46

Packet Parameter Measurement............................................................................. 48

Suspend Measurement ....................................................................................... 4

Resume Measurement........ ................................ .................................. .............. 50

Reset from Suspend Measurement.......................................................................... 51

Reset from High Speed Measurement...................................................................... 52

Taking Measurements

Acquiring Data................................................................................................ 52

Control Menu Options ....................................................................................... 54

Viewing Results............................................................................................... 55

Report Generation

Generating Reports ........................................................................................... 59

Viewing Reports .. .................................. ................................ .......................... 61

TSV File Generator................... ................................ ................................ ........ 62

Saving and Recalling Setups

How to Save and Recall a Setup .. ................................ .................................. ........ 63

Saving a Setup ........ ................................ ................................ ........................ 64

Recalling a Saved Setup ... .... . .... . .... . .... . .... .... . .... . .... . .... . .... ..... ... . . .... . .... . .... ..... ... . . 65

Recalling the Default Setup. . .... ... . . .... . .... . .... ..... .... . .... . .... ... . . .... . .... . .... ..... .... . .... . .... 66

Recently Saved Setup .......... ................................ ................................ .............. 67

Recently Recalled Setup ..................................................................................... 67

ii TDSUSB2 Universal Serial Bus Measurements Package

Tutorial

Introduction to the Tutorial....................................................................................... 69

Starting the Application. .................................. ................................ ........................ 69

Recalling a .tsv File .. .... . .... . .... ..... .... . .... . .... .... . .... . .... ... . . .... . .... ..... .... . .... . .... ..... .... . ... 69

Taking a Full Speed Signal Quality Measurement . .... . .... . .... ..... ... . . .... . .... . .... .... . .... . .... ..... ... 70

Taking a Low Speed Inrush Current Measurement .. ................................ .......................... 71

Taking a High Speed Signal Quality Measurement...... ................................ ...................... 72

Taking a Low Speed Signal Quality Measurement . . .... .... . .... . .... . . .... . ..... . .... . ..... . .... . ..... . .... . 73

Application Examples

About Application Examples....................... ................................ .............................. 75

Full Speed Signal Quality Tests for Downstream Testing

Specifying the Equipment-Full Speed Signal Quality Downstream Tests.............................. 75

Typical Equipment Setup-Full Speed Signal Quality Downstream Tests . .... ..... .... . .... . .... .... . . 75

Selecting

Viewing Results-Full Speed Signal Quality Tests. .... .... . .... . .... .... . .... . .... .... . .... . .... .... . .... . 78

Generating Reports-Full Speed Signal Quality Tests ..................................................... 79

Droop Test for Ports of Hub

Specifying the Equipment-Low Speed Droop Tests ...................................................... 79

Typical Equipment Setup-Low Speed Droop Tests ............. .................................. ........ 79

Selecting and Conﬁguring Measurements-Droop Tests .................................................. 82

Viewing Results-Droop Tests................................................................................ 82

Generating Reports-Droop Tests ............................................................................ 83

Full Speed Signal Quality Tests for Upstream Testing

Specifying the Equipment-Full Speed Signal Quality Tests for Upstream Testing.................... 83

Typical Equipment Setup-Full Speed Signal Quality Tests for Upstream Testing... . .... .... . .... . ... 83

Selecting and Conﬁguring Measurements-Full Speed Signal Quality Tests for Upstream Testing.. 84

Viewing Results-Full Speed Signal Quality Tests for Upstream Testing .... . .... ..... ..... .... . .... . .. 86

Generating Reports-Full Speed Signal Quality Tests for Upstream Testing ..................... ...... 86

Inrush Current Test for a device

Specifying the Equipment-Full Speed Inrush Current Test .......... ................................ .... 86

Typical Equipment Setup-Inrush Current Test............................................................. 87

Selecting and Conﬁguring Measurements-Inrush Current Test.. ................................ ........ 89

Viewing Results-Inrush Current Test....................................................................... 89

Generating Reports-Inrush Current Test ................................................................... 90

View Inrush Measurements Report in CSV format ................... .................................. .. 91

High Speed Report in Tektronix Format ................................................................... 92

View Procedural Steps from the Application .............................................................. 92

View Waveform Plot for Signal Quality Check High Speed Devices. . .... . .... . .... . .... . .... . .... . ... 95

View Chirp Measurement Results .......................... ................................ ................ 96

Signal Quality Tests for High Speed Devices

Specifying the Equipment-Signal Quality Tests for High Speed Devices for Upstream Testing .... 96

and Conﬁguring Measurements-Full Speed Signal Quality Tests .... . .... .... . .... . .... ... . 76

Table of Contents

TDSUSB2 Universal Serial Bus Measurements Packa ge iii

Table of Contents

Typical Equipment Setup-Signal Quality Tests for High Speed Devices for Upstream Testing ... .. 97

Selecting and Conﬁguring Measurements-Signal Quality Tests for High Speed Devices for Upstream

Viewing Results-Signal Quality Tests for High Speed Devices for Upstream Testing.. . . .... . .... . 101

Generating Reports-Signal Quality Tests for High Speed Devices for Upstream Testing... . .... . . 102

Packet Parameter Measurement

Specifying the Equipment-Packet Parameter Measurement ........................................... 102

Selecting and Conﬁguring Measurement-Packet Parameter Measurement .................. ........ 102

Viewing Results-Packet Parameter Measurement............................. .......................... 104

Generating Reports-Packet Parameter Measurement................................................... 105

Resume Measurement

Specifying the Equipment-Resume Measurement ................ ................................ ...... 108

Typical Equipment Setup-Resume Measurement ......... ................................ .............. 109

Selecting and Conﬁguring Measurement-Resume .................... .................................. 110

Viewing Results-Resume Measurement............................................ ...................... 111

Generating Reports-Resume Measurement.... ................................ .......................... 111

Reset from Suspend Measurement

Specifying the Equipment-Reset from Suspend Measurement ................ ........................ 113

Typical Equipment Setup-Reset from Suspend Measurement ........................... .............. 113

Selecting and Conﬁguring Measurement-Reset from Suspend Measurement ....................... 115

Viewing Results-Reset from Suspend Measurement ................................................... 115

Generating Reports-Reset from Suspend Measurement.............. ................................ .. 117

Suspend Measurement

Specifying the Equipment-Suspend Measurement...................................................... 118

Typical Equipment Setup-Suspend Measurement....................................................... 119

Selecting and Conﬁguring Measurement-Suspend Measurement ..................................... 120

Viewing Results-Suspend Measurement ................................................................. 120

Generating Reports-Suspend Measurement.............................................................. 122

Reset From High Speed Measurement

Specifying the Equipment-Reset from High Speed Measurement .................................... 123

Typical Equipment Setup-Reset from High Speed Measurement ........... .......................... 124

Selecting and Conﬁguring Measurement-Reset from High Speed Measurement ................... 126

Viewing Res

Generating Reports-Reset from High Speed Measurement ............................................ 128

Chirp Measurement

Specifying the Equipment-Chirp.... ................................ .................................. .... 129

Typical Equipment Setup-Chirp................................. ................................ .......... 130

Selecting and Conﬁguring Measurement-Chirp............. ................................ ............ 133

Viewing Results-Chirp ..................................................................................... 133

Generating Reports-Chirp ................................................................................. 135

View High Speed Measurement Plug-Fest Speciﬁc Format . ................................ .......... 138

View Full Speed Measurements Report in Plug-Fest Speciﬁc Format................................ 139

Testing....................................... .................................. ............................ 99

ults -Reset from High Speed Measurement............. ................................ .. 126

iv TDSUSB2 Universal Serial Bus Measurements Package

View Signal Quality Check Eye Diagram.. . .... . .... .... . .... . .... ..... .... . .... . .... ..... .... . .... . .... 140

View Signal Quality Check Waveform Plot . . .... . .... ... . . .... . .... ..... .... . .... . .... ..... .... . .... . .. 141

View the Report for Full Speed Measurements .............................................................. 142

View Inrush Results Details .................................. ................................ .................. 142

View Waveform Plot for Full Speed Signal Quality Check Measurements ..... .... . .... . .... ..... ... . . .. 143

View Signal Quality Check Details.. . .... . .... ..... ..... .... . .... . .... . .... ..... .... . .... . .... . .... . .... .... . . 143

View Eye Diagram for F

View Eye Diagram For High Speed Measurements ......................................................... 144

View Waveform Plot For High Speed Measurements ... ................................ .................... 145

View Signal Quality Check Results Details . . .... .... . .... . .... . .... . .... .... . .... . .... . .... . .... .... . .... . .. 146

View Sample Report File for Inrush Current Check ........................... .............................. 147

R-GPIB Commands

About the R-GPIB Program.. ................................ ................................ .................. 149

R-GPIB Reference Materials ................................................................................... 149

Introduction to R-GPIB command

Guidelines to R-GPIB Programming.......................................................................... 150

Launching the Application using R-GPIB .......... ................................ .......................... 150

Variable: Value Command...................................................................................... 151

Variable: Value TDSUSB2 Command Arguments and Queries- Application ............................ 151

Variable: Value TDSUSB2 Command Arguments and Queries- Sequencer.............................. 151

Variable: Value TDSUSB2 Command Arguments and Queries-Conﬁrm Waveform...... .............. 152

Variable: Value TDSUSB2 Command Arguments and Queries- Save/Recall ............................ 152

Variable: Value TDSUSB2 Command Arguments and Queries- Report Generation .................... 153

Variable: Value TDSUSB2 Command Argume

Sample Program ................................................................................................. 157

Table of Contents

ull Speed Signal Quality Check Measurements ................. ................ 144

s............................................................................ 149

nts and Queries- Results ................................. 153

Reference

Shortcut Keys .................. ................................ .................................. ................ 165

USB2.0 Speciﬁcations .. ................................ .................................. ...................... 165

Error Codes and Warnings........................................ ................................ .............. 168

Settings for the supported Instruments .. . . .... . .... . .... ... . . .... . .... . .... . .... .... . .... . .... . .... . .... .... . . 176

Parameters

About Application Parameters ............................................................................ 183

File Menus

File Menu Parameters ................................................................................. 184

Save and Recall Menu Parameters ............................. .................................. .... 184

Preferences Parameters................................................................................ 185

Measurement Menus

Measurement Menus................................................................................... 185

Measurement Parameters ..................... .................................. ...................... 185

Conﬁgure Menus

TDSUSB2 Universal Serial Bus Measurements Packa ge v

Table of Contents

Results Menu

Utilities Menus

Help Menu

Control Menu

Measurement Algorithms

About Measurement Algorithms .................................. ................................ ........ 192

Cross-Over Voltage for Low Speed and Full Speed Signals ......................... .................. 193

Cross-Over Voltage for High-Spe

Signal Rate ............ ................................ ................................ ...................... 196

EOP Width Calculation .................................................................................... 197

Consecutive and Paired Jitter .... . .... . .... . .... . .... . .... . .... .... . .... . .... . .... . .... . .... . .... ... . . .... . 197

Eye Diagram .............. .................................. ................................ ................ 199

Eye Violation................................................................................................ 199

Inrush Current............................................................................................... 199

Droop Test ................................................................................................... 20

Receiver Sensitivity Test................................................................................... 202

Chirp Test for a Device..................................................................................... 203

Host Chirp Test.............................................................................................. 203

Monotonic Property Test......................... ................................ .......................... 204

Rising Edge Rate.......... ................................ .................................. ................ 204

Falling Edge Rate .... . .... . .... . .... .... . .... . .... . .... . .... .... . .... . .... . .... . .... .... . .... . .... . .... . .... 205

Packet Parameter............................................................................................ 205

Resume....................................................................................................... 206

Suspend ...................................................................................................... 207

Reset from Suspend ...................... ................................ ................................ .. 208

Reset from High Speed..................................................................................... 209

Equipment Setup for Tests

Conﬁgure Menu .............................. ................................ .......................... 187

Conﬁgure Signal Quality Measurements Parameters .... ..... ..... .... . .... . .... . .... . .... . .... . .. 187

Conﬁgure Inrush Current Measurement Parameters ............................................... 188

Conﬁgure Droop Test Parameters........................ .................................. .......... 189

Conﬁgure Receiver Sensitivity ... . .... ..... .... . .... . .... . .... ..... .... . .... . .... . .... ..... .... . .... . 189

Conﬁgure Suspend, Reset from High Speed, Resume, Reset from Suspend .................... 189

Conﬁgure Packet Parameter .......................................................................... 190

Conﬁgure Chirp ........................................................................................ 190

Results Menus.......................................................................................... 191

Utilities Menus .... . .... . .... . .... . .... . .... . .... . .... ..... ..... ..... ..... .... . .... . .... . .... . .... . .... . 191

Deskew.................. ................................ .................................. .............. 191

Report Generator Menu Parameters ............... ................................ .................. 191

TSV File Generator Menu Parameters................................... ............................ 192

Help Menu .......................... ................................ .................................. .. 192

Control Menu Parameters... ................................ ................................ .......... 192

ed Signals......................................... .................... 194

vi TDSUSB2 Universal Serial Bus Measurements Package

Glossary

Glossary .................... ................................ ................................ ...................... 233

Table of Contents

Low Speed Downstream Signal Quality Host Equipment Setup ... . .... . .... ... . . .... . .... ... . . .... . . 209

Low Speed Signal Quality for HUB Downstream . . .... ..... ..... .... . .... . .... . .... . .... .... . .... . .... 210

Full Speed Sig

Full Speed Downstream Host Equipment Setup ........................ ................................ 212

Full Speed Upstream Signal Quality Setup . ..... .... . .... . .... . .... . .... ..... ..... .... . .... . .... . .... . .. 213

High Speed Device Signal Quality Setup .... . .... . .... .... . .... . .... .... . .... . .... ..... .... . .... . .... ... 215

Chirp Test Equipment Setup........................... ................................ .................... 215

Receiver Sensitivity Setup . .... . .... . .... ... . . .... . .... . .... . .... .... . .... . .... . .... . .... .... . .... . .... . ... 217

Inrush set

Resume Test Equipment Setup .......................... ................................ .................. 219

Reset from Suspend Test Equipment Setup.............................. ................................ 220

Suspend Test Equipment Setup............................................................................ 221

Reset from High Speed Test Equipment Setup ............................ .............................. 222

Packet Parameter Test Equipment Setup................................................................. 223

nal Quality HUB Downstream Setup. .... . .... .... . .... . .... ... . . .... . .... .... . .... . .... 211

up.................. ................................ ................................ ................ 217

Index

TDSUSB2 Universal Serial Bus Measurements Packa ge vii

Table of Contents

viii TDSUSB2 Universal Serial Bus Measurements Package

General Safety Summary General Safety Summary

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as speciﬁed.

Only qualiﬁed personnel should perform service procedures. While using this product, you may need to access other parts of the system.

Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system .

To avoid Fire and Personal Injury

Use Proper Power Cord. Use only the power cord speciﬁed for this product and certiﬁed for the country

of use.

Connect

connecting the probe to the circuit under test. Disconnect the probe input and the probe ground from the circuit under test before disconnecting the probe from the measurement oscilloscope.

Ground the Product. This product is indirectly grounded through the grounding conductor of the

mainframe power cord. To avoid electric shock, the grounding conductor must be connected to earth groun is properly grounded.

Observe All Terminal Ratings. To a void ﬁre or shock hazard, observe all ratings and markings on the

product. Consult the product manual for further ratings information before making connections to the product.

Use Proper AC Adapter. Use only the AC adapter speciﬁed for this product.

Use Proper Fuse. Use only the fuse type and rating speciﬁed for this product.

Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected

yqualiﬁed service personnel.

Do Not Operate in Wet/Damp Conditions.

and Disconnect Properly. Connect the probe output to the measurement oscilloscope before

d. Before making connections to the input or output terminals of the product, ensure that the product

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

TDSUSB2 Universal Serial Bus Measurements Packa ge 1

General Safety Summary General Safety Summary

Terms in this Manual

These terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION. Caution statements identify conditions or practices that could result in damage to t his product

or other property.

Terms on the Product

These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the marking.

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION

indicates a hazard to property including the product.

Symbols on the Product

The following symbol(s) may appear on the product:

2 TDSUSB2 Universal Serial Bus Measurements Package

Introduction Welcome to the TDSUSB2 Universal Serial Bus Measurements P ackage

Welcome to the TDSUSB2 Universal Serial Bus Measurements Package

TDSUSB2 Universal Serial Bus Measurements Package is a Sun Java-based application that runs on the supported instruments connected to a PC. You can use the application software with the compliance test ﬁxture to take the following measurements:

Signal Quality

Inrush

Droop

supported by the test ﬁxture only)

Drop (

Receiver Sensitivity

Impedance Measurement using Time Domain Reﬂectometry (TDR), supported by the application

only with the test ﬁxture

Chirp measurements

Packet Parameter

Resume

Reset from Suspend

eset from High Speed

Suspend

The application runs on the oscilloscope and displays on the lower part of the screen. The oscilloscope application runs on the upper part of the screen.

TDSUSB2 Universal Serial Bus Measurements Packa ge 3

Introduction Online Help and Related Documentation

What do you want to do?

Online Help and Related Documentation (see page 4)

Introduction and Product Description (see page 9)

Installing the Application (see page 12)

TIP. To return to the Table of Contents, select Help Topics from the Help Topic Menu.

Online Help and Related Documentation

You can access the information on how to operate the application and the oscilloscope through the following related documents and online help.

Click Start > Programs > TekApplications > TDSUSB2 > Help to access the Online Help.

Click St version of the Online Help.

Click S Test procedure.

Click Test procedure.

Clic Test procedure.

Clic Reference Card.

art > Programs > TekApplications > TDSUSB2 > Help (PDF Version) to access the PDF

tart > Programs > TekApplications > TDSUSB2 > Host Test Procedure to access the Host

Start > Programs > TekApplications > TDSUSB2 > Hub Test Procedure to access the Hub

k Start > Programs > TekApplications > TDSUSB2 > Device Test Procedure to access the Device

k Start > Programs > TekApplications > TDSUSB2 > Quick Reference Card to access the Quick

See Also

Conventions (see page 5)

Printing from the Online Help

Some online help topics have color in the examples of the displayed application. If you want to print this type of topic on a monochrome printer, some information may not print because of certain colors. Instead, you Online Help. You can ﬁnd the ﬁle in the Documents directory o n the Optional Applications Software on Windows-Based Oscilloscopes DVD.Theﬁgures of application menus in the PDF ﬁle are gray scale and all of the information prints.

should print the topic from the PDF (portable document format) ﬁle that corresponds to the

Conventions

Online help uses the following conventions:

Refers to the software p art of the TDSUSB2 Universal Serial Bus Measurements Package as the

TDSUSB2 application or as the application.

When steps require a sequence of selections using the application interface, the ">" delimiter marks

each transition between a menu and an option. For example, one of the steps to recall a setup ﬁle

would appear as File > Recall.

Unit under test (UUT) refers to the USB2.0 device under test, hub under test, host under test, and

port under test.

SOF refers to the Start of Frames exchanged between the host controller and the device when the

device is connected to the host and enumerated by the test mode software.

TDSUSB2 Universal Serial Bus Measurements Package 5

Introduction Related Documentation

Feedback

Tektronix values your feedback on our products. To help us serve you better, please send us your suggestions, ideas, or comments about your oscilloscope.

Direct your feedback via email to

techsupport@tektronix.com or FAX at (503) 627-5695

and include the following information. Please be as speciﬁc as possible.

General information:

Instrumen

Probes used

Your name, company, mailing address, phone number, FAX number

Please indicate if you would like to be contacted by Tektronix about your suggestion or comments

Application speciﬁc information:

Software version number

Descri

If possible, save the oscilloscope and application setup ﬁles as .set ﬁles

If possible, save the waveform on which you are performing the measurement as a .wfm ﬁle

Once you have gathered this information, you can contact technical support by phone or through e-mail. If using e-mail, be sure to enter in t he subject line "TDSUSB2 Problem," and attach the .set and .wfm ﬁles.

TIP. To include screen shots from the oscilloscope menu bar, select File> Export Setup> Image tab or File

ve > Screen Capture. Save the screen shot in the default directory or you can choose a directory of

>Sa your choice. If you want the screen shots in color, select Edit> Copy setup> Images tab or select File > Save > Screen Capture and select Options to get the Screen Capture Save Option dialog box. Select the Color, Full Screen and the Normal option buttons. Select Copy. Copy the picture to any Paint editor software. You can then attach the ﬁle to your email (depending on the capabilities of your email editor).

t model number and hardware options, if any

ption of the problem such that technical support can duplicate the problem

TDSUSB2 Universal Serial Bus Measurements Packa ge 7

Introduction Feedback

8 TDSUSB2 Universal Serial Bus Measurements Package

Getting Started Introduction and Product Description

Introduction and Product Description

The TDSUSB2 Universal Serial Bus Measurements package, consists of a Java-based application and a comprehensive test ﬁxture. You can use the application software with the compliance test ﬁxture to take the followin

Signal Quality

Inrush

Droop

Drop (supported by the test ﬁxture only)

Receiver Sensitivity

g measurements:

Impedanc

only with the test ﬁxture

Chirp me

Packet Parameter

Resume

Reset from Suspend

Reset from High Speed

Suspend

pplication performs tests that measure the test signals for USB2.0 compliance, displays eye diagrams

The a and plots, displays the results as a summary or as details, and generates reports in different formats.

e Measurement using Time Domain Reﬂectometry (TDR), supported by the application

asurements

What do you want to do?

Accessories (see page 10)

Compatibility (see page 10)

equirements and Restrictions

Installing the Application (see page 12)

(see page 10)

TDSUSB2 Universal Serial Bus Measurements Packa ge 9

Getting Started Compatibility

Compatibility

For information on oscilloscope compatibility1, refer to the Optional Applications Software on Windows-Based Oscilloscopes Installation Manual, Tektronix part number 071-1888-XX. The manual is

also availab should be at least ± 8 volts. For High Speed testing, the dynamic range should be ± 2 volts.

For a current

le as a PDF ﬁle. The dynamic range of the probes used for Low Speed and Full Speed testing

list of compatible instruments, see the Software and Drivers category on the Tektronix Web site.

Requirements and Restrictions

You must install Java Run-Time Environment V1.4.2_02 on the supported oscilloscope.

The application uses the Math1 channel for Low Speed, Full Speed, and Single-ended High Speed Signal Quality modes of operation. You will lose any information that you have stored in the Math1 channel.

You cannot restore the oscilloscope settings if you select File > Exit from the application.

Accessories

The application include s the following standard accessories:

Optional Application Software on Windows-Based Instruments DVD

Optional Application Software on Windows-Based Instruments Installation Manual

TDSU

TDSUSBF USB2.0 Compliance Test Fixture Instructions

TDSUSBF USB2.0 Compliance Test Fixture (Revision B)

Optional Accessories:

Signal Source (for Receiver Sensitivity Tests):

DTG5334 or DTG5274 or DTG5078 with a DTGM 21 Output module-Data G enerator

AWG5 000 ser ies (AWG 500 2) or AWG7000 series

TDSUSBF USB2.0 Compliance Test Fixture (Revision B)

X5 attenuators required when using AWG models.

SB2 Universal Serial Bus Measurements Package Reference

10 TDSUSB2 Universal Serial Bus Measurements Package

Getting Started Accessories

Voltage Probes:

HP62481, P6330- High Bandwidth Differential Probe

H P6245 or P6243- High Bandwidth Single-ended Active Probe

The P6248 probe is approved for compliance testing, higher performance differential probes may be used for design applications. It is recommended to have an attenuation of divide by 1 for better results.

For DPO7000 series:

TDP1500 or TDP3500

TAP1500

P6248, P6330, or P6245 (these require TPA-BNC Adapter on DPO7000 series models)

2SMAcabl

es with SMA connectors for single-ended HS Signal Quality measurements

Current Probes:

TCP0030

TCP202

(requires TPA-BNC Adapter on DPO7000 series models)

TDR Measurements (for I mpedance Measurement test):

Tektronix DSA8000 Sampling Oscilloscope with Time Domain Reﬂectometer (TDR) Sampling

Module

Deskew Fixture: for supported instrument-Probe Calibration and Deskew Fixture, Tektronix part number (067-0405-XX)

6-inch AB Cable with USB-IF compliance logo tag

NOTE. Any references to standard cable or standard length of cable in all TDSUSB manuals refers to "6-inch AB Cable (standard USB cable with USB-IF compliance logo tag)", and references to USB cablerefersto"1-metreUSBcable”.

TDSUSB2 Universal Serial Bus Measurements Packa ge 11

Getting Started Setting up the Instrument to Take Measurements

Setting up the Instrument to Take Measurements

To set up the oscilloscope, follow these steps:

1. You must power on the oscilloscope for twenty minutes before you can start to take measurements.

2. You must run the compensation signal path on the oscilloscope.

3. You must make sure that the default factory setup is recalled before you start using the application in

the oscilloscope. To do so, push the recall default setup button on the front-panel of the oscilloscope to recall the default factory settings.

4. You should always use calibrated probes and degauss the current probes.

Recommended Instruments and Probes

Forinformationonrecommendedinstrumentsandprobes,refertotheOptional Application Software on Windows-Based Oscilloscopes Installation Manual.

Installing the Application

Refer to the Optional Applications Software on Windows-Based Instruments Installation Manual for the following information:

Installing an application

Applying a new label

Enabling an application

nloading updates from the Tektronix Web site

Dow

You ca n ﬁnd a PDF (portable document format) ﬁle of this document in the Documents directory on the

tional Applications Software on Windows-Based Instruments DVD. The DVD booklet only contains

information on installing the application from the DVD and on how to apply a new label.

Deskewing the Probes and Channels

To ensure accurate measurements, you must des kew the probes before you take measurements from your unit under test. The deskew process is where the oscilloscope adjusts the relative delay between the signals to accurately time correlate the displayed waveforms.

The application includes an automated deskew utility that you can use to deskew any pair of oscilloscope channels.

12 TDSUSB2 Universal Serial Bus Measurements Package

Getting Started Deskewing Probes and Channels on the supported Instruments

NOTE. It is recommend that you use the deskew ﬁxture speciﬁed in the accessories section to perform deskew. The deskew source can be the built-in probe compensation signal in the oscilloscope or an external sign

NOTE. The oscilloscope has a deskew range of 50 n s.

al source.

See Also

Deskewing P

robes and Channels on the supported Instruments

(see page 13)

Deskewing Probes and Channels on the supported Instruments

To deskew probes and channels on the supported instruments, follow these steps:

1. Connect the probes to Ch1 and Ch2 on the oscilloscope.

2. Connect the probe compensation signal to the deskew ﬁxture. You can use the probe compensation

signal from the oscilloscope as the source for the deskew ﬁxture.

3. Follow the on-screen prompts for the deskew operation with an external source.

The following ﬁgure shows signals before performing the deskew procedure with a single edge.

TDSUSB2 Universal Serial Bus Measurements Packa ge 13

Getting Started Deskewing Probes and Channels on the supported Instruments

4. To start the application from a supported oscilloscope, select File > Run Application > USB2.0 Test Package from the menu bar of the oscilloscope.

5. Select Utilities> Deskew.

6. Set the channel Source in the From area to Ch1. The Source waveform is the reference point to which

the remaining channels are deskewed.

7. Set the channel Source in the To area to Ch2, to deskew the channel.

8. Select the Reference Level for Ch1 and set the reference value. The reference level is the percentage

level of the waveform from which to take the edges to deskew.

9. Select the Reference Level in the To area for Ch2 and set the reference value.

10. Select the Hysteresis in the From area for Ch1. Hysteresis

level in the waveform.

11. Select the Hysteresis in the To area for Ch2 and set the hysteresis value.

elect the Slope, Rise or Fall, on which to perform the deskew operation.

12.S

13. Select the number of edges used for deskew.

(see page 18) helps to ignore the noise

14 TDSUSB2 Universal Serial Bus Measurements Package

Getting Started Deskewing Probes and Channels on the supported Instruments

14. To start the deskew utility, select Utilities> Perform Deskew and conﬁrm the operation.

15. Without changing the From: Ch1 channel, deskew the remaining channels.

The next ﬁgure shows the results after performing the deskew operation with a single edge. The reference level is set to 50% for Ch1 and Ch2, the hysteresis is set to 5%, the number of edges is set to 1, and the slope is set to the rising edge.

NOTE. The probe compensation signals varies from 0.8to1volt(forallsupportedTDSinstruments) and from 0.3 traditional oscilloscope. Set the Reference level and the Hysteresis level appropriately so that the Ref level is at the middle of the swing on the signal.

5 to 1 volt (for all supported DPO instruments) rather than swinging from 0 to 1 volt in a

To perform the deskew operation with an external source, follow these steps:

1. Co

2. Connect an external source to the deskew ﬁxture.

3. Follow the instructions of the Probe Calibration and Deskew ﬁxture (Tektronix part number:

TDSUSB2 Universal Serial Bus Measurements Packa ge 15

nnect the probes to Ch1 and Ch2 on the oscilloscope.

067-0405-xx) to make the connections.

Getting Started Deskewing Probes and Channels on the supported Instruments

4. Set up the oscilloscope as follows:

Use the Horizontal Scale knob to set the oscilloscope to an acquisition rate so that there are two or more samples on the deskew edge.

Use the Ve rtical Scale and Position knobs to adjust the signals to ﬁll the display without missing any part of the signals.

Set the Record Length so that there are more samples for the edges in the acquisition. It is recommended that you set the record length to 25000 points.

5. To start the application from a supported oscilloscope, select File > Run Application > USB2.0 Test Package from the menu bar of the oscilloscope.

6. Select Utilities > Deskew.

7. Set the channel Source in the From area to Ch1. The remaining channels are deskewed to the Source

waveform, which is the reference point.

8. Set the channel Source in the To area to Ch2, the channel to be deskewed.

9. Select the Reference Level for Ch1. The reference level is the percentage level of the waveform from

whichtotaketheedgestodeskew.

10. Select the Reference Level in the To a r ea for Ch2 and set the reference value.

11. Selec

12. Sele

13. Select the Slope, Rise or Fall, on which to perform the deskew operation.

14. Select the number of edges used for deskew.

15. To start the deskew utility, select Utilities> Perform Deskew and conﬁrm the operation.

16. Without changing the From: Ch1 channel, deskew the remaining channels.

17. The setup is an acquisition of a square signal at 100 KHz, with the Record length set to 25000 points to

t the Hysteresis in the From area for Ch1. Hysteresis

level in the waveform.

ct the Hysteresis in the To area for Ch2 and set the hysteresis value.

achieve the sample resolution of 1.6 ns.

The next ﬁgure shows an example of a deskew setup.

(see page 18) helps to ignore the noise

16 TDSUSB2 Universal Serial Bus Measurements Package

Getting Started Deskewing Probes and Channels on the supported Instruments

18. Set the Reference levels for Ch1 and Ch2 in the application to 50%, the hysteresis to 10%, the number of edges to 4, and the type to rising edge.

The next ﬁgure shows the display after performing the deskew for the multiple edge.

TDSUSB2 Universal Serial Bus Measurements Packa ge 17

Getting Started Deskewing Probes and Channels on the supported Instruments

19. The zoomed section of the waveform available on the lower part of the screen shows the results of the deskew operation clearly. You will see that after performing the deskew operation, the skew is automa

tically removed.

Hysteresis

Hysteresis indicates the noise level in the waveform.

18 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics About Basic Operations

About Basic Operations

This section contains information on the following topics and tasks:

Application Interface (see page 19)

Using Basic O

Setting Up the Software (see page 25)

Selecting a Measurement (see page 30)

HowtoSaveandRecallaSetup(see page 63)

Exiting the Application (see page 23)

scilloscope Functions

Application Interface

The application uses a Windows interface. You should refer to your oscilloscope user manual for the operating details of other controls, such as the front-panel buttons.

NOTE. The o scilloscope screen shrinks and appears in the top half of the display when the application is running on the supported instruments.

Application Directories and File Names (see page 22)

Application Interface Menu Controls (see page 20)

(see page 21)

TDSUSB2 Universal Serial Bus Measurements Packa ge 19

Operating Basics Application Interface Menu Controls

Application Interface Menu Controls

Item Description

Menu bar

Tab

Area

Option button Button that deﬁnes a particular command or task

List box

Box Box that yo

Check Boxes Square box that you can use to select or clear preferences

Scroll bar Vertical or horizontal bar at the side or bottom of a display area that can be used for

Browse

Command button

Keypad Keypad appears when you select the box; select and use it to enter a value

MP/GPknob A line that appears between the knob and the box when the MP or GP knob is selected;

xxx

Located at the top of the application display and contains application menus

Labeled group of options containing similar items

Visual frame that encloses a set of related options

Box that contains a list of items from which you can select one item

u can use to type in text, or to enter a value with the Keypad or a Multipurpose

knob

moving around in that area

Displays a window where you can look through a list of directories and ﬁles

Button that initiates an immediate action

turn the knob and select a value

20 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Using Basic Oscilloscope Functions

Using Basic Oscilloscope Functions

You can use the Help menu to access information about the oscilloscope. You can also use other oscilloscope functions and easily return to the application.

The TDSUSB2 application includes Online Help about the application menus and controls.

To display the Online Help, follow these steps:

1. Choose Help from the TDSUSB2 menu.

2. Use the Contents, Table of contents, or Index tabs to navigate through the help.

Minim

3. The touch s Screen OFF button on the oscilloscope front panel.

See Also

Minimizing and Maximizing the Application (see page 21)

Returning to the Application (see page 23)

creen mode of operation is enabled by default. You can disable this by using the Touch

izing and Maximizing the Application

To min is continually displayed.

To ma

imize the application, select File > Minimize. When you minimize the oscilloscope, the application

ximize the application, select the TDSUSB2 icon in the Windows taskbar.

TDSUSB2 Universal Serial Bus Measurements Packa ge 21

Operating Basics Application Directories and File Names

Application Directories and File Names

The application uses the directories for several functions, such as save and recall setup ﬁles, and uses the extensions appended to the ﬁle names to identify the ﬁle type.

The following table lists default directory names for the supported instruments:

See Also

ame Extensions

File N

File Name Extensions

Extensions Description

.csv

.ini

.set

.tsv

xxx

See Also

Used for

Home location

generato

Digital Sensitivity Test

r and for other csv ﬁles

signal generator pattern ﬁles for use in Receiver

(see page 22)

Input ﬁle is in the .csv (comma separated variable) format and is used to generate a .tsv (tab separated variable) ﬁle. An exported waveform that may be used as a source to generate a tsv format ﬁle

Application setup ﬁle

Instrument setup ﬁle with the same name, saved and recalled with .ini and .set ﬁle name extension

Input ﬁle in a Tab Separated Variable format

CSV File Format

TSV File Generator (see page 62)

22 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Returning to the Application

ReturningtotheApplication

When you access oscilloscope functions, the oscilloscope ﬁlls the display. You can access oscilloscope functions in the following ways:

1. Select the Hide button in the application display.

2. Select the Menu bar or the Toolbar mode on the oscilloscope and access the menus.

3. To return to the application, click the App button on the menu bar of the oscilloscope or click on

Analyze > Restore Application to restore the application.

Exiting the Application

To exit the application, select the Exit button or File > Exit or select the Exit button from the control panel.

When you exit the application, you can keep the oscilloscope s etup currently in use or restore the oscilloscope setup that was present before you started the application.

Description of the Test Fixture

The TDSUSBF USB2.0 Compliance Test Fixture (Revision B) is a break-out board that enables you to test live USB2.0 signals, exchanged between the device and the host. For more information on the compliance test ﬁxture, refer to the TDSUSBF USB2.0 Compliance Test Fixture Instructions shipped with the test ﬁxture.

The compliance test ﬁxture consists of the following sections:

SQ Test Section

Receiver Sensitivity Test

Impedance Measurement Test (TDR)

TDSUSB2 Universal Serial Bus Measurements Packa ge 23

Operating Basics Setting Up the Device Details

Disconnect Detect Test

Adjacent Trigger and Droop Test

Host SQ

Inrush Test

Downstream Sig Qual

Setting Up the Device Details

You can enter a unique identiﬁer (ID ) and description for the unit under test (device). The identiﬁer and the description appear in the generated reports for the tests performed on the unit under test. You can either type in the text directly in the boxe to generate automatic IDs for the unit or enter a preﬁx using the keypad.

NOTE. If you check the Generate Automatic ID, the Device ID ﬁeld is disabled and the Preﬁx ﬁeld is enabled. The report for Inrush Measurement displays details of the Signal Setup with the device description.

sfortheseﬁelds, or u se the keypad or a keyboard. You can also choose

24 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Setting Up the Software

Setting Up the Software

You can set up the application to take one or more measurements a t the same time. In addition, you can view the results as a summary, details, an eye diagram, and a waveform plot for Signal Quality checks. You can also gene

The application runs on the oscilloscope. It is recommended that you connect the keyboard and the mouse to use

See Also

View the Default Setup

rate the reports in one of the three formats: Tektronix Speciﬁc, Plug-Fest and CSV formats.

the application effectively.

Selectin

Conﬁguring a Measurement (see page 38)

g a Measurement

Setting Preferences

The Preferences menu consists of two tabs: General and Advanced. To access the Preferences menu, select File > Preferences.

(see page 30)

TDSUSB2 Universal Serial Bus Measurements Packa ge 25

Operating Basics Setting Preferences

In the General tab, you can select the following options:

Set a warning to indicate that the conﬁguration options were not changed since the last time you ran the application. If you set this option, the application prompts you to conﬁgure the measurements before acquiring data.

Automatically display the Eye Diagram without having to select the Eye Diagram button in the Results screen.

Automatically display the Waveform Plot without having to select the Waveform Plot in the Results screen.

Prompt for a File name or Device ID before automatically generating reports or data ﬁles.

Automatically generate .tsv ﬁles.

play the generated report.

Dis

Always display the waiver mask for High-Speed Near End and Low Speed eye diagrams.

Do Autoset Every Time.

NOTE. Autoset will happen only for Full-Speed/High Speed SQC measurements.

26 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Setting Preferences

In the Advanced tab, you can select the following options:

Enable user deﬁned scope BW. When you enable this option, you can set the oscilloscope BW for the application in DPO series oscilloscopes using the Horiz/Acq menu.

Prompt during report generation for the Droop test readout. When you enable this option, the application disables report generation in the Automatic mode.

Conﬁgure the test limits. The result: PASS or FAIL is determined by the limits you have deﬁned.

Place the vertical cursors between the start and end of the single USB2.0 packet. This is used when more than one USB2.0 packet is displayed on the oscilloscope for Signal Quality measurements.

Set the trigger holdoff value to capture the USB2.0 high-speed test packet.

NOTE. If you enable the Conﬁgure Test Limits options, the Results Summary and Report Generation in Plug-Fest format is disabled.

TDSUSB2 Universal Serial Bus Measurements Packa ge 27

Operating Basics Table of Measurements and Options

Table of Measurements and Options

Low Speed and F

Area

Signal Qual

Signal Quality Check Signal Rate Measures the inverse of the average bit-time that

Signal Quality Check

Signal Qu

Signal Quality Check Consecutive Jitter

Signal Quality Check EOP Width Measures the width of the end-of-packet of a USB

Signal Quality Check Cross-Over voltage

Signal Quality Check

Inrush Current Check Inrush Current Measures the amount of electrical charge drawn

roop Test

xxx

ity Check

ality Check

ull Speed Measurements

Option

Eye Diagram

Paired JK Jitter

Paired KJ Jitter

Rising Edge Rate

Falling Edge Rate

roop Test

Description

Checks whet corresponding eye diagram

gives the transmission rate of the USB signal

Measures the jitter time for paired (JK next to KJ) different

Measures differential data transition

Measure calculated using the signal rate

signal

Measures the voltage at which the D+ voltage crosses the D– voltage

Measures the Rising Edge/Slew rate in V/ μs and is cal

Rising Edge Rate = Amplitude / Rise Time

Where Amplitude is the peak-to-peak amplitude for the c is calculated based on the high level of the inner vertical eye height reference levels

Measures the Falling Edge/Slew rate in V/ μs and

alculated using the Fall time as

is c

Falling Edge Rate = Amplitude / Fall Time

Where Amplitude is the peak-to-peak amplitude for

corresponding signaling rate and the Fall time

the is calculated based on the lower level of the inner vertical eye height reference levels

a device as soon as it is connected to a USB

by network

Measures the difference in the VBUS voltage when the load switch is open to the lowest value of the

oltage and the load switch

her the USB signal is aligned with its

ial data transition

the jitter time for paired (KJ next to JK)

s the jitter at every consecutive data bit

culated using the Rise time as

orresponding signaling rate and the Rise time

28 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Table of Measurements and Options

High Speed Measurements

Area

Signal Quality Check

Signal Quali

Signal Quality Check

Signal Qu

Signal Quality Check

Inrush Current Check Inrush Current Measures the amount of electrical charge drawn

Droop Test Droop Test

Receiver Sensitivity Test Receiver Sensitivity Is an indicator of Receiver Sensitivity. A High

Chirp Test Chirp Checks a part of handshake that occurs during

ty Check

ality Check

Option

Eye Diagram

Signal Rate Measures the

Monotonic P

EOP Width Measures

Rising Ed

Fallin

roperty

ge Rate

g Edge Rate

Description

Checks whether the USB signal is aligned with its correspondin

gives the transmission rate of the Test_Packet

Detects when the Signal is Monotonic if and only if data [i+1] ≥ data [i] in case of consistently increasing [i+1] ≤ data [i] when consistently decreasing (falling slope) and never increasing in value where i ranges fr

a Test_Packet

Measures the Rising Edge/Slew rate in V/ μs and is calculated using the Rise time as

Rising E

Where Amplitude is the peak-to-peak amplitude for the corresponding signaling rate and the Rise time is calc vertical eye height reference levels

Measures the Falling Edge/Slew rate in V/ μs and is calculated using the Fall time as

ng Edge Rate = Amplitude / Fall Time

Falli

Where Amplitude is the peak-to-peak amplitude for the corresponding signaling rate and the Fall time is cal vertical eye height reference levels

by a device as soon as it is connected to a USB

work

net

sures the difference in the VBUS voltage when

Mea the load switch is open to the lowest value of the voltage and the load switch

eed capable device must indicate 'packet(Data)

Sp not received' (squelch) when the input of the receiver falls below 100 mV differential amplitude.

imilarly the device must not indicate squelch if the

S differential amplitude is greater than 150 mV

Reset Protocol for high speed capable hubs and devices. In this handshake, the hub/host and the device are required to detect chirp J and K of a speciﬁed minimum duration and amplitude

g eye diagram

inverse of the average bit-time that

(rising slope), never decreasing data

om0ton

the width of the end-of-packet pattern of

dge Rate = Amplitude / Rise Time

ulated based on the high level of the inner

culated based on the lower level of the inner

TDSUSB2 Universal Serial Bus Measurements Packa ge 29

Operating Basics Selecting a Measurement

Area

Suspend Test Suspend Measures the t

Resume Test Resume Resumes the High-speed operation in a device

Rest from High-Speed Test

Reset from Suspend Reset from Suspend Measures the time between the falling edge of

Packet Parameter Packet Parameter

xxx

Option

Reset

Description

ime between the end of the last Start of Frame (SOF) and the rising edge transition to the Full Speed J state. The acceptable range should be betw applicable if you have selected a Host, Device, or a Hub-Upstream device

or a hub, which is indicated by the presence of High-speed amplitude) following the K state driven by the host controller. For the Host this is the time between the falling not exceed 3.0mS

Measures the time between the beginning of the last SOF and before the reset and the beginning of ChirpThis test will be applicable for Device and HUB upstream

D+ signa between 2.5 us and 3 ms. This test is applicable for Device and HUB upstream

Measures the parameter of the packet such as Sync Bi on the selected measurement

een 3 m s to 3.125 ms. This is

SOF packets (with 400mV nominal

edge of D+ to the First SOF. This should

K. This is between 3.1 ms and 6 ms.

l and the start of Device chirp-K. This is

ts, EOP, and Inter-Packet Gap depending

Selecting a Measurement

To take a measurement, select Measurement from the Measurements menu, which is also the default opening screen in the application. To access the Select option in the Measurement menu, select

surements> Select.

Mea

Therearethreecategoriesofmeasurements:LowSpeed, Full Speed, and High Speed measurements. The

surements for Low, Full and High Speed signals are S ignal Quality Checks, Inrush Current Check,

mea and Droop Test. The additional measurements for High Speed tests are Receiver Sensitivity, Monotonic Property, and Chirp Test, Packet Parameter, Suspend, Resume, Reset from Suspend, and Reset from High Speed.

You need to select the measurements for a particular signal speed of the unit under test. After selecting the tests, you must conﬁgure the application based on Signal Source, Tier, Test Point, and Signal Direction.

You can test the units for the following:

Devices for Upstream Signal Quality Check

Hubs and Hosts for Downstream Signal Quality Check

30 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Selecting a Measurement

Ports of a Hub for Droop Test

Devices for Inrush Current

See Also

Selecting a Measurement (see page 30)

Measurement Menu (see page 30)

Signal Quality Check (see page 32)

Inrush Current Check (see page 33)

Droop Tes

Receiver Sensitivity Measurement (see page 35)

Chirp Measurement (see page 36)

Packet Parameter Measurement (see page 48)

Suspend Measurement (see page 49)

(see page 201)

Resume Measurement (see page 50)

from Suspend Measurement

Reset

Reset from High Speed Measurement (see page 52)

What do youwant to do?. Table of Measurements and Options (see page 28)

guring a Measurement

Conﬁ

Saving a Setup (see page 64)

Recalling a Saved Setup (see page 65)

(see page 51)

(see page 38)

TDSUSB2 Universal Serial Bus Measurements Packa ge 31

Operating Basics Signal Quality Check

Signal Quality Check

The application performs Signal Quality tests that include the following tests:

Area

Signal Quality Check

Signal Qual

Signal Quality Check

Signal Qu

Signal Quality Check Consecutive Jitter

Signal Quality Check EOP Width Measures the width of the end-of-packet of

Signal Quality Check Cross-Over voltage

Signal Quality Check

nal Quality Check

Sig

Signal Quality Check Monotonic Property (For High

xxx

ity Check

ality Check

Option

Eye Diagram

Signal Rate Measures th

PairedJKJitter

Paired KJ Jitter

Rising Edge Rate

Falling Edge Rate

Speed only)

Description

Checks whether the USB signal is aligned with its corr

that gives the transmission rate of the USB signal

Measures the jitter time for paired (JK next to KJ) differ

Measures JK) differential data transition

Measures bit calculated using the signal rate

a USB signal

Measures the voltage at which the D+ voltage crosses the D– voltage

The Rising Edge/Slew rate in (V/μs) is calcu

Rising Edge Rate = Amplitude / Rise Time

Where Amplitude is the peak-to-peak ampli rate and the Rise time is calculated based on the high level of the inner vertical eye height refe

The calculated using the Fall time as

Falling Edge Rate = Amplitude / Fall Time

Whe amplitude for the corresponding signaling rate and the Fall time is calculated based on

e lower level of the inner vertical eye height

th reference levels

Measures the Monotonic Signal if the data [i] < data [i-1] where data[l] is the record

oint in the acquired waveform. This is in

p the case of consistently increasing (rising Slope) only. If the data [i] > data [i-1] in case

f consistently decreasing )falling Slope) and

o never increasing in value where i ranges from 0 to n, the signal I is said to be monotonic

esponding eye diagram

e inverse of the average bit-time

ential data transition

the jitter time for paired (KJ next to

the jitter at every consecutive data

latedusingtheRisetimeas

tude for the corresponding signaling

rence levels

Falling Edge/Slew rate in (V/μs) is

re Amplitude is the peak-to-peak

32 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Inrush Current Check

NOTE. The USB2.0 speciﬁcations recommend that you should test the signal quality for upstream and downstream trafﬁc. In upstream testing, the application captures the signals transmitted from the device to the host. In do

Downstream testing is performed on ports of a hub. When testing a hub, you need to connect the USB2.0 unit to Tier 6 connected to the Tier 5, so that you can test the hub on the Tier 6.

wnstream testing, the application captures the signals transmitted from the host to the device.

to ensure the worst case. Each hub level is referred to as a Tier. The hub under test is

Inrush Cur

The applic current higher than that speciﬁed in the USB2.0 speciﬁcations when connected to a USB2.0 system. If the measured current drawn is higher than a speciﬁed value, the other USB2.0 devices connected to the bus may not be able to function properly.

When a unit is connected, there is a sharp intake of current followed by a comparatively less steep decay. Small humps or perturbations are noticed in the current trace, depending on when the unit resets.

The TDSUSB2 application automatically sets up the oscilloscope. The application gives a direct readout of Charge (µC) and Capacitance (µF) values. The application displays the details of the results after comparing the test results with the USB2.0 speciﬁcations.

rent Check

ation can perform an Inrush current check to v erify that the unit under test does not draw

Probe Degaussing

It is mandatory to perform degauss for the current probe before carrying out inrush measurement. You can refer to the probe manual for the degaussing procedure.

TDSUSB2 Universal Serial Bus Measurements Packa ge 33

Operating Basics Droop Measurement

Droop Measurement

The Droop voltage is the difference in the V

voltage when you apply a no load condition and a 100 mA

BUS

load to the port under test (all other ports are fully loaded).

The Droop test evaluates the worst case droop by alternately applying a droop load and no load to the port under test while all other ports are supplying the maximum load possible. All the V are relativ

e to local ground.

measurements

BUS

The TDSUSB2 application automatically sets up the oscilloscope for the speciﬁed test conﬁguration. When you st

art the application, it acquires the signal, and provides the V

measurement, and displays

DROOP

PASS or FA I L.

NOTE. The TDSUSB2 application helps to report the Drop test. You can do this by enabling an option in

le> Preferences> Advanced menu. You can enter the multimeter reading for the Drop test in the

the Fi TDSUSB2 application during report generation for a consolidated report.

34 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Receiver Sensitivity Measurement

Receiver Sensitivity Measurement

To improve the performance of the application in a noisy environment, the USB2.0 high speed device should respond to IN tokens with NAKs when the signaling level is at or above the speciﬁed level.

The Receiver Sensitivity test requires a high-speed data simulator, such as the Tektronix DTG5334, DTG5274, or DTG5078; or the AWG5000 series (AWG5002) or AWG7000 series generators, to transmit IN tokens of mode. The host is then replaced by the data simulator to continue to transmit IN tokens. The signaling amplitude is presented to the device under test at a level at or above 150 mV. At these levels, the unit under test must not be in the squelched mode, responding to IN packets with NAKs. The amplitude of the signals from data senerator varies less than 100 mV. The unit under test must be squelched and not respond to IN tokens with NAKs.

This tests the receiver capability of high speed units (device) to respond to the particular data pattern generated by the USB2.0 data simulator. The unit under test responds to the data pattern level above the squelch (<100 mV).

varying amplitude. The test requires the unit under test to be placed in the Test_SE0_NAK

level (>150 mV) and should not respond when the data pattern level is below the squelch level

The TDS Digital signal generator pattern ﬁles (AWG5k-HS-USB.zip and DTG_setup.zip are available for download from www.tektronix.com). Pattern ﬁles for other Tektronix data simulators are available from www.tektronix.com.

USB2 application provides the procedural steps to perform this measurement. It also provides

TDSUSB2 Universal Serial Bus Measurements Packa ge 35

Operating Basics Chirp Measurement

Chirp Measurement

To perform a Chirp test, connect the unit under test and the single-ended probes to acquire data. You can measure the Data for Chirp K amplitude, Chirp K duration, and Reset duration. You need to manually verify that t

here are three K–J pairs in less than 500 µs.

The TDSUSB2 application automates this process and automatically generates the results (see page 96) and reports for the results of Chirp-K duration, Chirp-K amplitude, and Reset duration.

36 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Monotonic Property

Monotonic Property

While performing a USB2.0 High Speed compliance test, you need to verify that the signal to be tested is monotonic.

The following graph shows the monotonic behavior of a USB2.0 high speed signal with a rise time of 500 ps.

To verify the monotonic behavior of a signal, the oscilloscope must have a sample rate high enough to capture as many sample points as possible on a rising or falling edge. In addition, the oscilloscope should have en

The application coupled with a high performance Tektronix oscilloscope automates the process and ensur

ough bandwidth to ensure that the high frequency non-monotonic transition is not attenuated.

es repeatability of test results.

TDSUSB2 Universal Serial Bus Measurements Packa ge 37

Operating Basics Conﬁguring a Measurement

Conﬁguring a M easurement

To access the Conﬁgure: Measurement, go to Measurements> Conﬁgure. The application also provides a Conﬁgure option with each measurement area to allow you to conﬁgure the selected measurements.

NOTE. If you s ‘The selected measurements have not been conﬁgured. Do you want to continue?.’ In this case, the application runs with the default settings. If you select the Run button before conﬁguring the measurement and have enabled the File> Preferences> General option, the application displays the warning message ‘Warn if conﬁguration was not changed since last run, when the run button is pressed.’

See Also

Conﬁg

The a on the keypad to conﬁgure limits for these options.

elect the Run button before conﬁguring a measurement, the application displays the message

Conﬁguring Signal Quality Measurements (see page 39)

Conﬁguring Inrush Current Measurements (see page 40)

Conﬁguring Droop Measurements (see page 40)

Conﬁguring Receiver Sensitivity Measurements (see page 41)

Conﬁguring Chirp Measurement (see page 42)

ure Limits

pplication displays the maximum and minimum values for the selected tests. You can use the ‘>’ sign

Option

Set Sets the values you enter

Default Restore the default values

Cancel Cancels all the changes you enter

xxx

NOTE. The application enables the Conﬁgure Limits values when you select the option File> Preferences> Advanced menu.

38 TDSUSB2 Universal Serial Bus Measurements Package

Description

Operating Basics Conﬁguring Signal Quality Measurements

Conﬁguring Signal Quality Measurements

To access the Measurement: Conﬁgure, go to Measurements> Conﬁgure. Be sure to select the relevant measurements before you conﬁgure them. There are two tabs for the Signal Quality Measurements: Conﬁgure and

The Conﬁgure tab allows you to select and set the Tier, Signal Direction and the Test Point options. You must select Point (Near End or Far End) at which the unit will be tested.

Source.

the Tier (Tier 1 through 6), the direction of signal (Upstream or Downstream) and the Test

For Low Spe signals, you can set the Test Point to Far End only.

For Monot

The Source tab allows you to select the Source of the signal: a live signal or the signal from a ﬁle. For a live sig you can test only single-ended signals (D+ and D–). For High Speed devices, it is recommended that you use a differential probe.

ed and High Speed signals, you can se t Test Point to Near End or Far End. For Full Speed

onic Property measurement, you can conﬁgure the measurement levels.

nal there are two options: Differential and Single-Ended. For Low Speed and Full Speed devices,

See Also

Conﬁgure Signal Quality Measurements Parameters (see page 187)

Signal Quality Conﬁguration Options

Signal Quality Checks (see page 32)

TDSUSB2 Universal Serial Bus Measurements Packa ge 39

Operating Basics Conﬁguring Inrush Current Measurements

Conﬁguring Inrush Current Measurements

To access the Measurements: Conﬁgure menu, go to the Measurements > Conﬁgure.

The Conﬁgure tab allows you to set the voltage value on V be entered manually or probed from a channel that is captured f

and the unit under test. The V

bus

rom the test ﬁxture. Select this option

bus

can

from the Source tab of Inrush Conﬁguration menu.

The Tier 1 is always used for testing. The unit under test can be any one of the following types:

Hot Plug Attach

Low Powered Conﬁgure

Low Powered Resume

High Powered Conﬁgure

High Powered Unconﬁgure

High Powered Resume

The Hot Plug Attach is the most common unit under test. The Source tab allows you to select the source of the signal: a live signal or the signal taken from a tsv ﬁle. If you choose to manually enter the V voltage, you cannot select the V

voltage source.

BUS

See Also

Conﬁgure Inrush Current Measurement Parameters (see page 188)

Inrush Current Conﬁguration Options

Inrush Current Check (see page 33)

Conﬁguring Droop Measurements

Select the Droop measurement and conﬁgure it. To access the Conﬁgure: Measurements menu, go to Measurements > Conﬁgure.

The Conﬁgure tab allows you to select the Port (Port 1 through 7), Hub and Source of the sig nal. The source of the signal can be live or from a .tsv ﬁle. The hubs can either be Self powered or Bus powered.

See Also

View Droop Test Conﬁgure Menu

Droop Test Conﬁguration Options

Droop Test (see page 201)

40 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Conﬁguring Receiver Sensitivity Measurements

Conﬁguring Receiver Sensitivity Measurements

To c onﬁgure receiver sensitivity measurements, follow these steps:

NOTE. Receiver Sensitivity Tests setup ﬁles for AWG and DTG models (AWG5k-HS-USB.zip or DTG_setup.z

1. Select the High Speed measurement tab > More button > Receiver Sensitivity measurement.

2. To access the Conﬁgure Measurements menu, select Measurements> Conﬁgure.

ip) are available for download from www.tektronix.com

3. Select the Source from Ch1 to Ch4.

4. Select the Run button.

5. Select OK and follow the on-screen prompts to perform the tests.

6. To generate reports, select Utilities > Report Generator.

See Also

Generating Reports (see page 59)

Viewing Reports (see page 61)

iew Conﬁgure Receiver Sensitivity

Selecting a Measurement (see page 30)

Receiver Sensitivity Measurement (see page 35)

TDSUSB2 Universal Serial Bus Measurements Packa ge 41

Operating Basics Conﬁguring Chirp Measurement

Conﬁguring Chirp Measurement

To conﬁgure chirp measurements, follow these steps:

1. Select the High Speed measurement tab>Morebutton>Chirpmeasurement.

2. To access the Conﬁgure Measurements menu, go to Measurements> Conﬁgure.

3. In the Conﬁgure tab, you ca n select the DUT (Host or Device) and perform selected tests associated

with it.

4. Select the Host option to display the different tests for the DUT. The available tests are:

EL_33, EL_34: You can perform two separate measurements o n an acquired waveform.

EL_35: You can perform a single measurement on an acquired waveform.

42 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Conﬁguring Chirp Measurement

5. Select the Device option to display the different tests for the DUT. The available tests are:

EL_28, EL_29: You can perform two separate measurements on an acquired waveform.

6. Select the channel source in the D+ and D– ﬁelds. Use the drop down arrow in the D+, D- ﬁeld to set the source. The available options are:Ch1- Ch4 and Ref1-Ref4.

7. Select the Run button.

8. To generate reports, select Utilities > Report Generator.

See Also

Generating Reports (see page 59)

Viewing Reports (see page 61)

View Conﬁ

Chirp Measurement (see page 36)

gure Chirp Test

TDSUSB2 Universal Serial Bus Measurements Packa ge 43

Operating Basics Conﬁguring Resume Measurement

Conﬁguring Resume Measurement

To conﬁgure Resume measureme nt, follow these steps:

1. Select the High Speed measurement tab > More button > Resume measurement. The device/HUB resumes the High-Speed operation, which is indicated by the presence of High-speed SOF packets (with 400 mV nominal amplitude) following the K state driven by the host controller. For the Host, this is the t

2. To access the Conﬁgure Measurements menu, go to Measurements > Conﬁgure.

ime between the falling edge of D+ to the First SOF. This should not exceed 3.0 ms.

3. Set the input Signal Direction to either Upstream or Downstream.

4. Select the channel source in the D+ and D– ﬁelds. Use the drop down arrow in the D+, D– ﬁeldtoset

the source. The available options are: Ch1- Ch4 and Ref1-Ref4.

5. Select the Run button.

6. To g

enerate reports, s elect Utilities > Report Generator.

See Also

Generating Reports (see page 59)

44 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Conﬁguring Suspend Measurement

Conﬁguring Suspend Measurement

To c onﬁgure Suspend measurement, follow these steps:

1. Select the High Speed measurement tab > More button > Suspend measurement. This measures the time between the end of the last SOF and the rising edge transition to the Full Speed J state. The acceptable range is between 3 ms to 3.125 ms.

2. To access the Conﬁgure Measurements menu, go to Measurements > Conﬁgure.

3. Set the input Signal Direction to either Upstream or Downstream.

4. Selec

5. Sele

6. To generate reports, select Utilities > Report Generator.

t the channel source in the D+ and D– ﬁelds.UsethedropdownarrowintheD+,D–ﬁeldtoset

the source. The available options are: Ch1- Ch4 and Ref1-Ref4.

ct the Run button.

See Also

nerating Reports

(see page 59)

TDSUSB2 Universal Serial Bus Measurements Packa ge 45

Operating Basics Conﬁguring Reset from Suspend Measurement

Conﬁguring Reset from Suspend Measurement

To c onﬁgure Reset from Suspend measurement, follow these steps:

1. Select the High Speed measurement tab > More button > Reset from Suspend measurement. This measures the time b etween the falling edge of D+ signal and the start of Device chirp-K. This is between 2.5 us and 3 ms. This test is applicable for Device and HUB upstream.

2. To access the Conﬁgure Measurements menu, go to Measurements > Conﬁgure.

3. In the Conﬁgure tab, you can set the channel Source.

4. The signal direction is always set to Upstream. This is because you can measure Reset from Suspend

only on an upstream signal. The Downstream option is disabled.

5. Select the channel source in the D+ and D– ﬁelds. Use the drop down arrow in the D+, D– ﬁeldtoset the source. The available options are: Ch1- Ch4 and Ref1-Ref4.

6. Select the Run button.

7. To generate reports, select Utilities > Report Generator.

See Also

Generating Reports (see page 59)

Conﬁguring Packet Parameter Measurement

To conﬁgure Packet Parameter measurement, follow these steps:

46 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Conﬁguring Packet Parameter Mea surement

1. Select the High Speed measure ment tab > More button > Packet Parameter measurement.

2. To access the Conﬁgure Measurements menu, go to Measurements > Conﬁgure.

3. In the Conﬁgure tab, you can select the DUT (Host or Device) and perform selected tests associated

with it.

4. Select the Host o ption to display the different tests for the DUT. The available tests are:

EL_21, waveform.

EL_22:

EL_55: You can perform a single measurement on an acquired waveform.

EL_23, EL_25: You can perform three separate measurements on a single acquired

You can perform a single measurement on an acquired waveform.

TDSUSB2 Universal Serial Bus Measurements Packa ge 47

Operating Basics Packet Parameter Measurement

5. Select the Device option to display the different tests for the DUT. The available tests are:

EL_21, EL_22, EL_25: You can perform three separate measurements on an acquired waveform.

EL_22: You can perform a single measurement on an acquired waveform.

6. Use the drop down arrow in the Differential ﬁeld to set the channel source. The available options are: Ch1-Ch4, Ref1-Ref4.

7. Select the Run button.

8. To generate

See Also

Generating Reports (see page 59)

Packet P

Packet packet characteristics for upstream and downstream signaling. The measurement calculates the SYNC ﬁeld length, EOP length and inter packet gap. The acceptable range of EOP for all transmitted p ackets (except SOFs) must be between 7.5 and 8.5 bits. The packet parameter algorithm calculates the EOP depending on this range.

The acceptable range of inter packet gap is between 88 bits to 192 bits. The SYNC ﬁeld for all transmitted packets is calculated by counting the bits to check for 32-bit SYNC ﬁeld. The inter packet delay and SYNC status is calculated between the EOP indexes. The EOP width in time is calculated by dividing

EOP width by 480 Mbps.

the

reports, select Utilities > Report Generator.

arameter Measurement

parameter measurement is for high speed Host controller and Device. There are several important

48 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Suspend Measurement

Suspend Measurement

This test calculates the time between the end of last SOF and the rising edge transition to Full-speed J state for Host / Device / Hub- upstream. This time must be between 3mS and 3.125mS. To get the Suspend signal, hotlines. The application analyzes data for the Suspend Time.

plug the unit under test (device) and measure the signalling with single-ended probes on both

TDSUSB2 Universal Serial Bus Measurements Packa ge 49

Operating Basics Resume Measurement

Resume Measurement

This test calculates the device/HUB resume High-speed operation, indicated by High-speed SOF packets (with 400 mV nominal amplitude) following the K state driven by the host controller. For the Host, this is the time betw Suspend signal, hot-plug the unit under test (device) and measure the s ignaling with single-ended probes on both lines. The application analyzes data for the following:

Resume Time

Amplitude

een the falling edge of D+ and the First SOF. This should not exceed 3.0 ms. To get the

50 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Reset from Suspend Measurement

Reset from Suspend Measurement

This test calculates the time between the falling edge of D+ signal and the start of Device chirp-K for the Device/HUB upstream. This must be between 2.5 us and 3 ms. To get the Reset from Suspend Measurement probes on both lines. The application analyzes data for the Reset From Suspend Time.

signal, hot-plug the unit under test (device), and measure the signaling with single-ended

TDSUSB2 Universal Serial Bus Measurements Packa ge 51

Operating Basics Reset from High Speed Measurement

Reset from High Speed Measurement

This test calculates the time between the beginning of the last SOF and before the reset and the beginning of Chirp-K for Device and HUB upstream. This must be between 3.1 ms and 6 ms. To get the Reset from High-Speed M single-ended probes on both lines. The application analyzes data for Reset From High Speed Time.

easurement signal, hot-plug the unit under test (device) and measure the signaling with

Acquiring Data

The application automatically sets the oscilloscope settings for the selected measurements. To acquire data from the oscilloscope, follow these steps:

1. Select the

2. The

52 TDSUSB2 Universal Serial Bus Measurements Package

application displays the message ‘Please press OK when correct waveform is acquired’ for

live signals.

command button to run the application.

Operating Basics Acquiring Data

3. If you select the Cursor Mode, the application displays the message ‘Place the Cursors at the start and end position of t he USB packet. Press OK when done.’

4. If you select the Inrush measurement, the application displays the message in the next ﬁgure.

5. If you select the Droop measurement, the application displays the message in the next ﬁgure.

TDSUSB2 Universal Serial Bus Measurements Packa ge 53

Operating Basics Control Menu Options

6. If you select the Packet Parameter measurement, the application displays the message in the next ﬁgure.

7. The application automatically displays the result after acquiring the data.

8. The application automatically displays the eye diagram and the waveform plot for the acquired signals.

This is possible only if you enable this option in the Preferences > General.

NOTE. You can modify the automatic oscilloscope settings if there is no valid waveform on the oscilloscope

screen. To do so, select the complete the process.

TIP. You may need to adjust the inrush setups, as inrush currents have a wide variety of durations and peak currents. Use the vertical division settings between 100 mA/division to 5 A/division. Adjust the timebase appropriately to have a minimum acquisition duration of 100 ms.

Control Menu Options

Option/button

Run icon Runs the application

e button

Hid

Exit button Exits the application

xxx

See Also

Control Menu

Control Menu Parameters (see page 192)

command button to run the application and select OK to

Description

es the application and displays the oscilloscope application on the entire screen

Hid

54 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Viewing Results

Viewing Results

You can view the results in a summary form or in a detailed form. To access the Results: Summary, select Results > Summary. The application displays one of the following results.

APASSindica

AFAILindica

and d o not comply with the USB2.0 speciﬁcations.

A Conditional PASS indicates that the limits of the tests are within the USB2.0 waiver limits. A conditional pass is a true pass with allowable waiver limits. These limits are not published to developers or equipment vendors. However, usb.org encourages developers to design to meet within the USB2.0 speciﬁcations.

NOTE. The application displays PASS or FAIL based on the limits you set.

To access the De t ails: select Results > Details. Use the scroll bar to view the results that are not visible within the display window. The report contains statistical values for the following:

Standard deviation (StdDev)

Mean

Peak-to-peak (Pk–Pk)

Root mean square (RMS)

tes that the results of the measurements comply with the USB2.0 speciﬁcations.

tes that the measured values of the measurements are beyond the waiver limits

mum (Max) and minimum (Min) values

Maxi

Population (the number of cycles used to calculate the statistics). The population used for signal

es is number of bits.

rat

Status (PASS/FAIL/Conditional PASS) for the selected tests

You can also view the eye diagram and the waveform plot for signal quality check.

Eye Diagram

You can select the Eye Diagram option to view the eye diagram for the unit under test. The eye diagram has the Zoom and Cursor features that you can use to v iew the results. You can also use the Reset button to reset the default eye pattern.

The Eye Diagram menu contains the following options:

Zoom: You can select the zoom from the menu. Select the Deﬁne the area of interest using the mouse and selecting the zoom in area. The selected area is dis played

TDSUSB2 Universal Serial Bus Measurements Packa ge 55

icon to zoom into the area of interest.

Operating Basics Viewing Results

in the entire upper half of the oscilloscope. Select the icon to zoom out. You can use the Zoom In and Zoom Out icons until the application reaches the maximum and the minimum zoom limits.

Cursors: Yo u can select the Cursors and the vertical cursors appear. You can drag the cursors to change the positions, and read the time values on the X-axis.

56 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Viewing Results

Use the mouse to select the Horizontal cursor .Youcandragthe cursors to change the positions, and read the voltage values on the Y-axis.

Waveform Plot

You can select the Waveform Plot option to view the Waveform Plot for the unit under test. The Waveform Plot has a Zoom and the Cursor feature that you can use to view the results.

The Waveform Plot has features that enable you to zoom in and out on the waveform, use Vertical and Horizontal Cursors, Save the Plot, Reset the original plot, and select to display the signals.

To display any or all the signals for the waveform plots menu, you can use the following options:

Zoom: You can select the Zoom from the menu. Select the Deﬁne the area of interest using the mouse and selecting the zoom in area. The entire upper half of the

oscilloscope displays the selected area. Select the Zoom Out icons until the application reaches the maximum and the minimum zoom limit.

icon to zoom out. You can use the Zoom In and

icon to zoom into the area of interest.

Cursor: You can select the Cursors and the vertical cursors appear. Drag the cursors to change the positions of the cursors, and read the time values on the X-axis.

TDSUSB2 Universal Serial Bus Measurements Packa ge 57

Operating Basics Viewing Results

Select the Horizontal cursors . You can drag the horizontal cursors to change the positions, and read the voltage values on the Y-axis.

NOTE. The Zoom and Cursor options are mutually exclusive.

Save: You can use the Save button to save the zoomed in or zoomed out diagram as a .jpg ﬁle.

Reset: You can use the Reset button to restore the waveform plot to its original display.

For waveform plots, any or all the signals can be displayed using the following buttons:

D+: Use this button to turn on or turn off the display of the D+ signal.

D–: Use this button to turn on or turn off the display of the D– signal.

CMD: Use this button to turn on or turn off the display of the Common Mode voltage.

Diff: Use this button to turn on or turn off the display of the Differential signal.

You can use any combination of the Zoom or Cursors, D+, D–, CMD (Common Mode Voltage) and Diff buttons to view and save the waveform plot.

The annotations at the lower edge of the Wave J, K , E (EOP), I (IDLE) and Sync ( C ).

There are two Results menu options.

58 TDSUSB2 Universal Serial Bus Measurements Package

form Plot classify the signal pulse into different bus states:

Operating Basics Generating Reports

Summary: The application summarizes the results of the measurements. The results are classiﬁed as PASS, FAIL and Conditional PASS. Click on PASS, FAIL and Conditional PASS. The dialog box shows the Measured M

ean, USB2.0 Speciﬁcations.

Details: The applicatio

NOTE. The application displays the user c are selected in File > Preferences > Advanced tab.

The application disables the Results > when you enable Conﬁgure Test Limits.

View Result Summary

View Result Details

n displays the results of the completed tests in a tabular form.

olumn in the Results Details only if the User Conﬁgurable Limits

Summary and Report generation in Plug-Fest Speciﬁcformat

Generating Reports

To access the Report Generator menu, select Utilities > Report Generator. You can generate the USB IF report in any one of the three formats:

Tektronix Speciﬁc is the default format used by the TDSUSB2 application.

Plug-Fest format is the format used by the USB-IF.

CSVformatreportisauser-deﬁned report generated in a comma separated variable format.

TDSUSB2 Universal Serial Bus Measurements Packa ge 59

Operating Basics Generating Reports

You can generate reports in one of the following modes:

Manual: Select the report format, the directory name, and the ﬁle to which the report is saved. Select the Generate option to generate the report. Specify the ﬁle name for the report.

Automatic: The application generates reports automatically without user intervention as soon as the results are calculated. Select Generate Automatic Ids to enable this option while selecting measurements. T he application uses the preﬁx that you enter to generate the ﬁle. If you select the Ask for the File

name/Device ID before automatically generating Reports/Data ﬁles check box in the File > Preferences > General tab, you can enter the Device ID/File Name before generating the report. If the File already exists, the application displays a message box to conﬁrm whether to overwrite the existing report. If you select Yes, the application overwrites the report; if you select NO, you can enter a new Device ID/File Name or cancel the report generation. The reports are generated in the following path:

C:\TekApplications\tdsusb2\report.Theﬁle name is preﬁx_001_reportformat.csv or

preﬁx_001_reportformat.htm.

The report contains the device ID, device description, date and result of the test. The report also contains the following statistical values:

Maximum (Max) and Minimum (Min) values

Mean

Peak-to-peak (Pk–Pk)

ard deviation (StdDev)

Stand

Root mean square (RMS)

Population

Status (PASS/FAIL/Conditional PASS) for the selected tests

User- The application displays this value if you select the "Allow user conﬁguration of test limits" in the Preferences menu and set the test limits before running the measurement.

The report includes the eye diagram and the waveform plots for the Signal Quality Check. The display on the oscilloscope screen is embedded in the Droop report.

NOTE. Automatic Report generation is not available if you select the Drop Test readout option in File > Preferences > Advanced tab.

See Also

Report Generator Menu Parameters (see page 191)

Report Generation Options

View Signal Quality Check Report in Tektronix SpeciﬁcFormat

60 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Viewing Reports

Viewing Reports (see page 61)

Generating Reports (see page 59)

Viewing Reports

You can use an HTML viewer or a browser to view the Tektronix speciﬁc and Plug-Fest format reports. You can view the .csv (Comma Separated Variable) report in a text editor, spreadsheet, database, or a data analysis program for further analysis. You can edit the .csv ﬁle to suit your needs.

NOTE. All the reports contain the eye diagram and the waveform plot except for the reports generated in the .cs

See Also

v ﬁle format.

Report Generator Menu Parameters (see page 191)

Report G

View Signal Quality Check Report in Tektronix SpeciﬁcFormat

Viewing Reports (see page 61)

Generating Reports (see page 59)

eneration Options

TDSUSB2 Universal Serial Bus Measurements Packa ge 61

Operating Basics TSV File Generator

TSV File Generator

You can use the TSV File Generator Utility to convert a .csv (Comma Separated Variable) ﬁle to a .tsv (Tab Separated Variable) ﬁle. To access TSV File Generator, go to the main menu and select Utilities > TSV File Gen

If the Input is a .csv ﬁle, then the application enables the CSV Waveform Source area. You can select the sources bas

You can specify the directory C:\TekApplications\tdsusb2\tsvﬁlegenerator for the differential signal from where the .

IftheInputisaLivesignal,youcannotaccesstheCSVWaveformSourcearea. SelecttheLive or Ref as t if you take the measurements and display the results. T he default directory for the .tsv ﬁles is C:\TekApplications\tdsusb2\tsvﬁles. You can also specify the location where the tsv ﬁle is to be generated.

TSV ﬁle format description

erator.

ed on the Signal type. For a single-ended signal, specify the D+ and D– inputs.

csv ﬁle is taken.

he source ﬁle to enable the Live Input option. You can enable the Convert option only

For Low Speed and Full Speed Signal Quality Check, the input TSV ﬁleisanmx3matrixwithm rows and three columns. The ﬁle has Time values and Voltage values for D+ and D– in the ﬁrst, second and third columns respectively.

The input TSV ﬁle for High Speed Signal Quality Check is a m x 2 matrix with m rows and two columns. The ﬁle has Time and Voltage values for Differential signals in the ﬁrst and second columns.

The input TSV ﬁles for Inrush and Droop tests are an m x 2 matrix with m rows and 2 columns. For Inrush tests, the ﬁle has Time and Current values in the ﬁrst and second columns. For Droop test, the ﬁle has

e and Voltage values in the ﬁrst and second columns.

Tim

CSV ﬁle format description

Low Speed and Full Speed single-ended signals for Signal Quality Check require two .csv ﬁles to generate the corresponding TSV ﬁle. The .csv ﬁles have two columns. One .csv ﬁle has time and voltage values for D+ signals, while the second column has the time and the current values for D– signals. Both ﬁles must have the same time values.

Differential signals require one .csv ﬁle with two columns, one column for time and another for voltage values.

If you select Differential for Inrush and Droop signals, the .csv ﬁle has two columns: one column for time values, and another for current and voltage values. You require only one .csv ﬁle for Inrush and Droop tests. This .csv ﬁle has two columns: one column for the Time Values and the other for Current (Inrush) and Voltage (Droop) values. You must use the Differential option for conversion.

View the TSV ﬁle generator

62 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics How to Save and Recall a Setup

How to Save and Recall a Setup

You can use the Save and Recall menus to save and recall the various conﬁguration setups. To access the Save and Recall menus, go to the File menu in the menu bar and choose Save or Recall.

NOTE. Do not e cause instability to the application. If you try to edit the.ini of the .set ﬁles, you get an error message ‘The saved ﬁle has been corrupted and cannot be recalled.’

dit the .ini or the .set ﬁles, or the recall setup ﬁles generated by the application. This can

See Also

Saving a Setup (see page 64)

Recalling a Saved Setup (see page 65)

TDSUSB2 Universal Serial Bus Measurements Packa ge 63

Operating Basics Saving a Setup

Recalling the Default Setup (see page 66)

HowtoSaveandRecallaSetup(see page 63)

Saving a Setup

You can save various conﬁguration setups and recall them when needed. To save the application settings to asetupﬁle, follow these steps:

1. Select File > Save.

2. Select the Save button.

3. Browse or

4. Choose Save to save the setup or Cancel to cancel the action.

NOTE. Th oscilloscope .set ﬁles have the same ﬁle name.

enter a ﬁle name. The application appends a .ini extension to the name of setup ﬁles.

e application saves the oscilloscope setup to a .set ﬁle. The application .ini ﬁles and the

See Also

Recalling Recently Recalled Setups (see page 64)

Recalling a Saved Setup (see page 65)

lling the Default Setup

Reca

Recalling Recently Saved Setups (see page 64)

(see page 66)

64 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Recalling a Saved Setup

Recalling a Saved Setup

To recall the application settings from a saved setup ﬁle, follow these steps:

1. Select File > Recall.

2. Browse the directory C:\TekApplications\tdsusb2\setup to recall the .ini ﬁles or select the directory

where you have saved the setup ﬁle.

3. Select or enter a .ini ﬁle name.

4. Choose Open to recall the setup or Cancel to cancel the operation.

NOTE. The application recalls the oscilloscope setup from a .set ﬁle.

See Also

Recalling Recently Recalled Setups (see page 64)

Recalling a Saved Setup (see page 65)

Recalling the Default Setup (see page 66)

ing Recently Saved Setups

Recall

HowtoSaveandRecallaSetup(see page 63)

(see page 64)

TDSUSB2 Universal Serial Bus Measurements Packa ge 65

Operating Basics Recalling the Default Setup

Recalling the Default Setup

To recall the application settings from the Default setup ﬁle, select File > Recall Default. The application recalls the default setup and displays the message ‘Default setup recalled successfully.’

See Also

Recalling Recently Recalled Setups (see page 64)

Recalling a Saved Setup (see page 65)

Recalling the Default Setup (see page 66)

ing Recently Saved Setups

Recall

HowtoSaveandRecallaSetup(see page 63)

(see page 64)

66 TDSUSB2 Universal Serial Bus Measurements Package

Operating Basics Recently Saved Setup

Recently Saved Setup

The application stores the last four saved setups. If you need to modify any of them, follow these steps:

1. Select File > Recently Saved.

2. Select the setup from the list of recently saved setups that are displayed.

NOTE. When you select a ﬁle from the list of recently saved ﬁles menu, the ﬁle becomes the ﬁrst element in the list of selections.

See Also

Recalling Recently Recalled Setups (see page 64)

Recalling a Saved Setup (see page 65)

Recalling the Default Setup (see page 66)

Recen

The ap

1. Select File > Recently Recalled.

2. Select the setup from the list of setups displayed.

NOTE. When you select a ﬁle from the list of recently saved ﬁles popup menu, the ﬁle becomes the ﬁrst ele

See Also

Recalling Recently Saved Setups (see page 64)

HowtoSaveandRecallaSetup(see page 63)

tly Recalled Setup

plication stores the last four recalled setups. If you need to recall any of them, follow these steps:

ment in the list of selections.

Recalling Recently Recalled Setups (see page 64)

ecalling a Saved Setup

(see page 65)

Recalling the Default Setup (see page 66)

Recalling Recently Saved Setups (see page 64)

HowtoSaveandRecallaSetup(see page 63)

TDSUSB2 Universal Serial Bus Measurements Packa ge 67

Operating Basics Recently Recalled Setup

68 TDSUSB2 Universal Serial Bus Measurements Package

Tutorial Introduction to the Tutorial

Introduction to the Tutorial

The tutorial teaches you how to set up the application by recalling a .tsv ﬁle, take measurements, and view the results. More operating information is available in the Operating Basics section. Before you begin the tut

orial, you must do the following tasks:

Starting the Application (see page 69)

Recalling a tsv File (see page 69)

Starting the Application

To start the application, select File > Run Application > USB2.0 Test Package or App > USB2.0 Test Package or Analyze > USB2.0 Test Package.

Recalling a .tsv File

The application distribution includes the .tsv ﬁles used with this tutorial. The table below shows the types of signals that represent these waveforms.

Tsv File name

C:\TekApplications\tdsusb2\tsvfiles\LS_SQC.tsv

C:\TekApplications\tdsusb2\tsvfiles\FS_SQC.tsv

C:\TekApplications\tdsusb2\tsvfiles\HS_sqc.tsv

C:\TekApplications\tdsusb2\tsvfiles\inrush.tsv

xxx

Signal type

Low Speed

Full Speed

High speed

Low/Full/High Speed

TDSUSB2 Universal Serial Bus Measurements Packa ge 69

Tutorial Taking a Full Speed Signal Quality Measurement

Taking a Full Speed Signal Quality Measurement

This section discusses how to take a Full Speed Signal Quality measurement, view the results, and generate a report. To perform these tasks, the application must be installed and enabled on a supported oscilloscope. View Install

To take a Full Speed Signal Quality measurement, follow these steps:

1. To set the application to default values, select File > Recall Default. The application displays the message ‘Default setup recalled successfully.’ Select OK to view a screen image showing the default settings.

2. Select all the Signal Quality measurements in the Signal Q uality Check area using Select All button.

3. Select the Conﬁgure tab or select Measurements > Conﬁgure. The Measurements: Conﬁgure default

settings display.

ing the application

(see page 12) to install the application.

4. Select the Measurements: Source D+, D– and Qualiﬁer. You have to always select D+ ﬁrst. If you select any one of the Live channels CH1-CH channel source. If you select any one of the Ref channels Ref1-Ref4 for D+ source, the remaining Ref channels are selected from the D– . There is no Qualiﬁer channel source for the Ref signals.

If the source is from a ﬁle, use the browse button to look for the ﬁle.

1. Selec

2. Select the

(see page 199) and the Waveform Plot.

3. Minimize the eye diagram a nd waveform plot to view the summary results.

4. The application displays the Results Summary as PASS

view the details of the selected test.

5. To view the Results Details command button in the Overall Result area to view the details of each measurement.

6. Select Utilities > Report Generator in the application menu bar to generate the Report.

7. You ca n view the default screen

appears with a default ﬁle name. You can change the ﬁle name if you want. Click on the Generate button.

4 for D+ source, the remaining Live channels are selected from the D– and the Qualiﬁer

ttheﬁle

C:\TekApplications\tdsusb2\tsvfiles\FS_SQC.tsv.

command button to run the application. The application displays the Eye Diagram

. If the source is Live or Ref, conﬁgure the appropriate channels for

. You can also select the result to

(see page 55), select Results > Details in the application menu bar or PASS

with the Tektronix Speciﬁc Format enabled. The report directory

8. Click the Generate button. The application generates an HTML ﬁle in

susb2\report

70 TDSUSB2 Universal Serial Bus Measurements Package

. To view this report, open it in an HTML vie wer or a browser.

C:\TekApplications\td-

Tutorial Taking a Low Speed Inrush Current Measurement

Taking a Low Speed Inrush Current Measurement

This section discusses how to take a Low Speed Inrush Current Measurement, view the results, and generate a report. To perform these tasks, the application must be installed and enabled on a supported oscilloscop

1. To set the application to default values, select File > Recall default. The application displays the message ‘De

2. Select Measurements > Low Speed tab.

fault setup recalled successfully.’

3. Select Inrush Current measurement

4. Select Measurements > Conﬁgure tab and use the default settings set by the application.

5. Select the Source tab. Select From File.

6. Select ﬁle

7. Select the

8. The application displays the Results Summary as Conditional PASS.

9. You can also select the result to view the details of the selected tests

10. Select Results > Details from the application menu bar to view Results Details

11. Select Utilities > Report Generator in the application menu bar to generate a report.

12. Select the CSV Speciﬁc Report and use the default ﬁle name. Select the Generate button.

13. The application displays the sample report ﬁle

C:\TekApplications\tdsusb2\tsvfiles\LS_inrush.tsv.

command button to run the application.

(see page 142).

(see page 147) in a browser.

TDSUSB2 Universal Serial Bus Measurements Packa ge 71

Tutorial Taking a High Speed Signal Quality Measurement

Taking a High Speed Signal Quality Measurement

This section discusses how to take a High Speed Signal Quality measurement, view the results, and generate the report. To perform these tasks, the application must be installed and enabled on a supported oscilloscop

To take a High Speed Signal Quality measurement, follow these steps:

1. To set the application to default values, select File > Recall Default. The application displays the message ‘Default setup recalled successfully.’

2. Select Measurements > High Speed Quality Check area using Select All button.

3. Select the Conﬁgure option or go to Measurements > Conﬁgure.

4. Select the Source tab > From File > Browse

5. Select the ﬁle

6. Select the

Eye Diagram

7. Minimize the eye diagram and the waveform plot button to view the summary results.

8. Select Results > Details in the application menu bar to view the Results Details.

Information b utton to display the additional information.

9. Select Utilities > Generate Report to generate the report.

10. Select the Report format as Plug-Fest Speciﬁc and use the default ﬁle name. Select Generate.

11. The application displays the sample report ﬁle

C:\TekApplications\tdsusb2\tsvfiles\HS_sqc.tsv.

command button to run the application. The application automatically displays the

(see page 144) and the Waveform Plot.

and select all the Signal Quality measurements in the Signal

and locate the ﬁle.

Click the Additional

(see page 138) in a browser.

72 TDSUSB2 Universal Serial Bus Measurements Package

Tutorial Taking a Low Speed Signal Quality Measurement

Taking a Low Speed Signal Quality Measurement

This section discusses how to take a Low Speed Signal Quality measurement, view the results, and generate a report. To perform these tasks, the application must be installed and enabled on a supported oscilloscop

To take a Low Speed Signal Quality measurement, follow these steps:

2. Select the Low Speed tab and s elect the Signal Quality measurements in the Signal Quality Check area usin

e. View Installing the application

g Select All button.

(see page 12) to install the application.

3. Select the Conﬁgure tab or select Measurements > Conﬁgure. The Measurements: Conﬁgure

sdisplay.

setting

4. Select the Measurements: Source. If the source is Live or Ref, conﬁgure the appropriate channels for D+, D– a CH1-CH4 for D+ source, the remaining Live channels are selected from the D– and the Qualiﬁer channel source. If you select any one of the Ref channels Ref1-Ref4 for D+ source, the remaining Ref channels are selected from the D– . There is no Qualiﬁer channel source for the Ref signals.

If the source is from the ﬁle, use the browse button to browse the ﬁle.

1. Select the ﬁle

2. Select the

(see page 144) and the Waveform Plot (see page 143).

3. Minimize the eye diagram and waveform plot to view the summary results.

4. The application displays the Results Summary as PASS

view the details of the selected test.

5. To view the Results Details PASS command button in the Overall Result area to view the details of each measurements.

6. Select Utilities > Report Generator in the application menu bar to generate the Report.

nd Qualiﬁer. You have to always select D+ ﬁrst. If you select any one of the Live channels

C:\TekApplications\tdsusb2\tsvfiles\LS_SQC.tsv.

command button to run the application. The application displays the Eye Diagram

. You can also s elect the result to

(see page 143), select Results > Details in the application menu bar or

default

7. You ca n view the default screen appears with a default ﬁle name. You can change the ﬁle name if you want. Click the Generate button.

8. Click the generate button. The application generates an HTML ﬁle in

susb2\report

TDSUSB2 Universal Serial Bus Measurements Packa ge 73

.Toview this report (see page 142),openitinanHTMLviewerorabrowser.

with the Tektronix Speciﬁc Format enabled. The report directory

C:\TekApplications\td-

Tutorial Taking a Low Speed Signal Quality Measurement

74 TDSUSB2 Universal Serial Bus Measurements Package

Application Examples About Application Examples

About Application Examples

This section presents the application examples. The simpliﬁed examples highlight the application measurements and show how to use the application to solve your test problems.

To use these examples, you must have the TDSUSB2 application installed and enabled on the oscilloscope. Connect the probes to your unit under test (UUT), and perform the conﬁguration tasks.

See Also

Starting the Application (see page 69)

Installing the Application (see page 12)

Specifying the Equipment-Full Speed Signal Quality Tests for Upstream Testing (see page 83)

Selecting and Conﬁguring Measurements-Droop Tests (see page 82)

Selecting and Conﬁguring Measurements-Full Spee

page 84)

Selecting and Conﬁguring Measurements-Inrush Current Test (see page 89)

Selecting and Conﬁguring Measurements-Signal Quality Tests for Hi

Testing (see page 99)

d Signal Quality Tests for Upstream Testing

gh Speed Devices for Upstream

(see

Specifying the Equipment-Full Speed Signal Quality Downstream Tests

The following equipment is needed for downstream signal quality check on a Full Speed device testing:

Tektronix digital oscilloscope

TDSUSB2 application

TDSUSBF compliance test ﬁxture (Revision B)

Three of the following single-ended voltage probes: P6245, P6243, TDP1500, TDP3500, or TAP1500.

Typical Equipment Setup-Full Speed Signal Quality Downstream Tests

To set up the equipment for Full Speed Signal Quality Downstream test, follow these steps:

1. Set the S6 switch to the Init position.

2. Use the adapters to connect the A receptacle from Device SQ test section (marked DUT) of the

test ﬁxture to the USB2.0 Low Speed device.

TDSUSB2 Universal Serial Bus Measurements Packa ge 75

Application Examples Selecting and Conﬁguring Measurements-Full Speed Signal Quality Tests

3. Connect Ch1 of the D+ probe to the D+ pins on the Device SQ section of the test ﬁxture.

4. Connect Ch2 of the D– probe to the D– pins on the Device SQ section of the test ﬁxture.

5. Connect the Init port of the Device SQ section of the test ﬁxture to any port of the unit under test

(hub) using USB cable.

6. Select the measurement and select the

7. Select OK after acquiring a waveform. Verify that it is a correct waveform.

NOTE. Make sure the acquired signal is a valid waveform.

command button to run the application.

Selecting and Conﬁguring Measurements-Full Speed Signal Quality Tests

Follow the steps to select measurements for Full Speed Signal Quality check:

76 TDSUSB2 Universal Serial Bus Measurements Package

Application Examples Selecting and Conﬁguring Measurements-Full Speed Signal Quality Tests

1. From the application menu, select Measurement > Select > Full Speed tab.

2. Select the following signal quality checks:

Eye Diagram Test

Signal Rate

Paired JK Ji

tter

Paired KJ Jitter

Consecutive Jitter

EOP Width

Cross-Over Voltage

Rising Edge Rate

Falling

Edge Rate

3. Select the Select All toggle button to select all the measurements simultaneously. Click on any measur

ement button to deselect it.

Conﬁguring the Measurement

Follow the steps to conﬁgure the selected measurements :

1. From

2. Conﬁgure the following options:

Option Set to

Tier Tier6

Direction Downstream

Test Po int

xxx

3. Select the Source tab.

the application menu, select Measurement > Conﬁgure > Conﬁgure.

Set the test point to Far End

4. Conﬁgure the following options:

Option Set to

Live/Ref Single-ended

xxx

5. If you select Single-ended, you must select two channels for D+ and D–.

6. Select

to acquire the data.

7. The application automatically displays the eye diagram and waveform plot of the signal acquired from the unit under test.

TDSUSB2 Universal Serial Bus Measurements Packa ge 77

Application Examples Viewing Results-Full Speed Signal Quality Tests

Viewing Results-Full Speed Signal Quality Tests

To view the results of the tests, follow these steps:

1. From the application menu, select Results > Summary.

2. Click on any of the test result buttons to get the details of that test.

3. From the application menu, select Results > Details.

4. Click the Eye Diagram (see page 144) option in Results Summary or the Details to view the Eye

Diagram.

5. Click the Waveform Plot

78 TDSUSB2 Universal Serial Bus Measurements Package

(see page 143) option to view the annotated waveform plot.

Application Examples Generating Reports-Full Speed Signal Quality Tests

Generating Reports-Full Speed Signal Quality Tests

To generate reports of the test results, follow these steps:

1. From the application menu, select Utilities > Report Generator.

2. Select any one of the Report Formats: Tektronix Speciﬁc, Plug-Fest Speciﬁc or CSV format.

3. Select the manual generation mode.

4. Select the Generate button to display and view the selected report format.

NOTE. You can view the Plug-Fest speciﬁc report format as HTML pages and the .csv format in Microsoft Excel.

Specifying the Equipment-Low Speed Droop Tests

The following equipment is needed to perform a Droop Test for Low Speed device:

Tektronix digital oscilloscope

TDSUSB2 application

TDSUSBF compliance test ﬁxture (Revision B)

Two of the following single-ended voltage probes: P6245, P6243, TDP1500, TDP3500, or TAP1500.

Typical Equipment Setup-Low Speed Droop Tests

To set up the equipment for Droop test, follow these steps:

1. Use the Droop and Adjacent Trigger section for the Droop test. Use standard USB cable to connect the loads on the test ﬁxture to the ports of the unit under test as shown in the next ﬁ gure.

2. The setup requires two channels of the oscilloscope: one for the Droop Load Trigger Timer that is on the Droop test load section, and the other for V section of the test ﬁxture. Use the load switch to select appropriate loads for Droop Test.

3. In the Droop and Adjacent Trigger section on the test ﬁxture, probe Ch1 from the VBUS and ground the pins.

4. In the Droop Test Load section on the test ﬁxture, probe Ch2 from the oscillator (marked OSC) and ground the pins.

that is on the Adjacent Trigger and Droop Test

BUS

5. Connect the Droop Trigger Test Load to the Port1 of the unit under test (hub).

6. Connect the Load1 to Port2 of the hub under test.

TDSUSB2 Universal Serial Bus Measurements Packa ge 79

Application Examples Typical Equipment Setup-Low Speed Droop Tests

7. Connect the Load2 to the A receptacle of the Droop and Adjacent Trigger section on the test ﬁxture. Connect the A pin dongle from the Droop and Adjacent Trigger section to the Port4 of the unit under test (hub). Po

8. Connect the Load3 to Port3 of the unit under test (hub). Now all the ports of the unit under test are connecte

rt4 is the port under test of the hub.

d (hub).

9. Select the measurement and select the

10. Select OK when the valid waveform is acquired.

11. Observe the droop in the VBUS when Droop test load is applied.

NOTE. The application automatically sets up the oscilloscope to acquire the Droop signal. If you do not get a valid signal, set up the oscilloscope accordingly.

NOTE. Use the Load Switch to select 500 mA test loads for Droop testing of a self powered hub and system. Use the Load Switch to select 100 mA test loads for Droop testing of bus powered hub and system.

command button to run the application.

80 TDSUSB2 Universal Serial Bus Measurements Package

Application Examples Typical Equipment Setup-Low Speed D roop Tests

TDSUSB2 Universal Serial Bus Measurements Packa ge 81

Application Examples Selecting and Conﬁguring Measurements-Droop Tests

Selecting and Conﬁguring Measurements-Droop Tests

From the application menu, select Measurement > Select > Droop Test.

Conﬁguring t

he Measurement

Follow the steps to conﬁgure the selected measurement:

1. From the application menu, select Measurement > Conﬁgure.

2. Conﬁgure the following options:

Option Set to

Port Port under test

Source

VBUS

Trigger

Device type

xxx

Downstream

Ch1

Ch2

Self-powered

3. Select to acquire the data.

4. After acquiring the data, the application displays the eye diagram and the waveform plot automatically.

Viewing Results-Droop Tests

To view the results of the tests, follow these steps:

1. Run

the application and from the application menu, select Results > Summary

(see page 201).

2. Click on any of the test result buttons to get the details of that test.

3. From the application menu, select Results > Details.

(see page 201)

4. Click the Eye Diagram option in Results Summary or Results Details to view the Eye Diagram.

5. Click the Waveform Plot to view the annotated waveform plot.

82 TDSUSB2 Universal Serial Bus Measurements Package

Application Examples Generating Reports-Droop Tests

Generating Reports-Droop Tests

To generate reports of the test results, follow these steps:

1. From the application menu, select Utilities > Report Generator.

2. Select any one of the Report Formats: Tektronix Speciﬁc, Plug-Fest Speciﬁc or CSV format.

3. Select Manual option to generate the report.

4. Select the G

NOTE. You can view the Plug-Fest speciﬁc report format as HTML pages and the .csv format in Microsoft Excel.

enerate button to display and view the selected report format.

Specifying the Equipment-Full Speed Signal Quality Tests for Upstream Testing

The following equipment is needed for u pstream signal quality check on a low or full speed device:

Tektron

TDSUSB2 application

TDSUSBF compliance test ﬁxture (Revision B)

Three of the following single-ended voltage probes: P6245, P6243, TDP1500, TDP3500, or TAP1500.

ix digital oscilloscope

Typical Equipment Setup-Full Speed Signal Quality Tests for Upstream Testing

To set up the e quipment for Full Speed Signal Quality test for Upstream, follow these steps:

1. Use the A receptacle to connect the USB unit under test (device) to the Inrush Droop section of the test ﬁxture.

2. Connect the Qualiﬁer device to the Adjacent Trigger and Droop section of the test ﬁxtureasshownin the next ﬁgure.

3. Connect Ch1 of the D+ probe to the D+ pins on the Inrush Droop section of the test ﬁxture.

4. Connect Ch2 of the D– probe to the D– pins on the Inrush Droop section of the test ﬁxture.

5. Connect the D+ (D- for Low speed) pin of the Adjacent Trigger and Droop Section of the test ﬁxture

to Ch3 as shown in the next ﬁgure.

TDSUSB2 Universal Serial Bus Measurements Packa ge 83

Application Examples Selecting and

Conﬁguring Mea

6. Use the connectors to connect the A pin dongle from the Adjacent Trigger and Droop section of the test ﬁxture to one port of the Hub 5. Use the A pin dongle from the Inrush Droop section of the test ﬁxture to anot

her port of the Hub 5.

surements-Full Speed Signal Quality Tests for Upstream Testing

7. Select the measurement and select the

8. Select OK after acquiring a waveform. Verify that it is a correct waveform.

NOTE. Use the standard USB cables to connect between the hubs. Keep the Discharge switch in the Inrush Droop section in the ON position.

command button to run the application.

lecting and Conﬁguring Measurements-Full Speed Signal Quality

sts for Upstream Testing

llow the steps to select measurements for Full Speed Signal Quality check:

84 TDSUSB2 Universal Serial Bus Measurements Package

Application Examples Selecting and

Conﬁguring Mea

surements-Full Speed Signal Quality Tests for Upstream Testing

1. Select Measurements > Select > Full Speed tab.

2. Select Signal Quality tests:

Eye Diagram Test

Signal Rate

Paired JK Ji

tter

Paired KJ Jitter

Consecutive Jitter

EOP Width

Cross-Over Voltage

Rising Edge Rate

Falling

Edge Rate

3. Select the Select All toggle button to select all the measurements simultaneously. Click any measur

ement button to deselect it.

Conﬁguring the Measurement

Follow the steps to conﬁgure the selected measurement:

1. From

2. Conﬁgure the following options:

Option Set to

Tier Tier6

Direction Upstream

Test Point Far End

xxx

3. Select the Source tab.

the application menu, select Measurement > Conﬁgure > Conﬁgure tab.

4. Conﬁgure the following options:

Option Set to

Live/Ref Single-ended Ch1, Ch2

Qualify Channel Ch3

xxx

5. Select to acquire the d

6. The application automatically displays the Eye Diagram

page 141) of the signal ac

ata.

(see page 140) and the Waveform Plot (see

quired from the unit under test.

TDSUSB2 Universal Serial Bus Measurements Packa ge 85

Application Examples Viewing Results-Full Speed Signal Quality Tests for Upstream Testing

Viewing Results-Full Speed Signal Quality Tests for Upstream Testing

To view the results of the tests, follow these steps:

1. Run the application and from the application menu, select Results > Summary.

2. Click any of the test result buttons to get the details of that test.

3. From the application menu, select Results > Details.

4. Click the Ey

Diagram.

5. Click the W

eDiagram

aveform Plot to view the annotated waveform plot.

(see page 144) option in Results Summary or Results Details to view the Eye

Generating Reports-Full Speed Signal Quality Tests for Upstream Testing

To generate reports of the test results, follow these steps:

1. From the application menu, select Utilities > Report Generator.

2. Select any one of the Report Formats: Tektronix, Plug-Fest SpeciﬁcorCSVformat.

3. Select the M anual option to generate the report.

4. Select the Generate button to display and view the selected report format.

NOTE. You can view the Plug-Fest speciﬁc report format as HTML pages and the .csv format in Microsoft Excel.

Specifying the Equipment-Full Speed Inrush Current Test

The following equipment is needed for Inrush Current Check on a Full Speed Device:

Tektronix digital oscilloscope

SUSB2 application

86 TDSUSB2 Universal Serial Bus Measurements Package

Application Examples Typical Equipment Setup-Inrush Current Test

TDSUSBF compliance test ﬁxture (Revision B)

One TCP202 or TCP0030 current probe

Typical Equipment Setup-Inrush Current Test

To set up the equipment for Inrush test, follow these steps:

1. Use the dongle on the Inrush section of the test ﬁxture to connect it to the host system.

2. Connect th

and Ch1 of the oscilloscope.

3. Conﬁgure the measurement and select the

4. Connect the unit under test to the A Receptacle of the Inrush section of the test ﬁxture and observe the

Inrush current signal.

5. Select OK after acquiring a waveform. Verify that it is a correct waveform.

NOTE. To avoid the triggering of Inrush signals and false inrush current by the discharge switch, place

ush discharge switch in the ON position and hot-plug the unit under test (device). In case a valid

the inr Inrush signal is not acquired, use the cursor mode in File > Preferences or set up the oscilloscope to get a valid waveform.

e current probe between the V

loop wire on the Inrush section on the Test ﬁxture

BUS

command button to run the application.

TDSUSB2 Universal Serial Bus Measurements Packa ge 87

Application Examples Typical Equipment Setup-Inrush Current Test

88 TDSUSB2 Universal Serial Bus Measurements Package

Tektronix TDSUSB2 Primary User

Specifications and Main Features

Frequently Asked Questions

User Manual

General Safety Summary General Safety Summary

General Safety Summary

Introduction Welcome to the TDSUSB2 Universal Serial Bus Measurements P ackage

Welcome to the TDSUSB2 Universal Serial Bus Measurements Package

Online Help and Related Documentation

Printing from the Online Help

Conventions

Related Documentation

Feedback

Getting Started Introduction and Product Description

Introduction and Product Description

Compatibility

Requirements and Restrictions

Accessories

Setting up the Instrument to Take Measurements

Installing the Application

Deskewing the Probes and Channels

Deskewing Probes and Channels on the supported Instruments

Operating Basics About Basic Operations

About Basic Operations

Application Interface

Application Interface Menu Controls

Using Basic Oscilloscope Functions

Application Directories and File Names

File Name Extensions

ReturningtotheApplication

Exiting the Application

Description of the Test Fixture

Setting Up the Device Details

Setting Up the Software

Setting Preferences

Table of Measurements and Options

Selecting a Measurement

Signal Quality Check

Operating Basics Inrush Current Check

Droop Measurement

Receiver Sensitivity Measurement

Chirp Measurement

Monotonic Property

Operating Basics Packet Parameter Measurement

Suspend Measurement

Resume Measurement

Reset from Suspend Measurement

Reset from High Speed Measurement

Acquiring Data

Control Menu Options

Viewing Results

Generating Reports

Viewing Reports

TSV File Generator

How to Save and Recall a Setup

Saving a Setup

Recalling a Saved Setup

Recalling the Default Setup

Recently Saved Setup

Tutorial Introduction to the Tutorial

Introduction to the Tutorial

Starting the Application

Recalling a .tsv File

Taking a Full Speed Signal Quality Measurement

Taking a Low Speed Inrush Current Measurement

Taking a High Speed Signal Quality Measurement

Taking a Low Speed Signal Quality Measurement

Application Examples About Application Examples

About Application Examples

Specifying the Equipment-Full Speed Signal Quality Downstream Tests

Typical Equipment Setup-Full Speed Signal Quality Downstream Tests

Viewing Results-Full Speed Signal Quality Tests

Generating Reports-Full Speed Signal Quality Tests

Specifying the Equipment-Low Speed Droop Tests

Typical Equipment Setup-Low Speed Droop Tests

Viewing Results-Droop Tests

Generating Reports-Droop Tests

Specifying the Equipment-Full Speed Signal Quality Tests for Upstream Testing

Typical Equipment Setup-Full Speed Signal Quality Tests for Upstream Testing

Viewing Results-Full Speed Signal Quality Tests for Upstream Testing