Tektronix TekExpress 100G-TXE Compliance Solution Help User manual

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TekExpress® 100G-TXE Compliance Solution

Printable Application Help

*P077129802*

077-1298-02

TekExpress® 100G-TXE Compliance Solution

Printable Application Help

www.tek.com

077-1298-02

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. Box 500 Beaverton, OR 97077 USA

For product information, sales, service, and technical support:

■

In North America, call 1-800-833-9200.

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Worldwide, visit www.tek.com to find contacts in your area.

Welcome .............................................................................................................................................. v

Getting help and support

Related documentation ................................................................................................................... 1

Conventions .................................................................................................................................... 2

Technical support ........................................................................................................................... 2

Getting started

Minimum system requirements ...................................................................................................... 5

Instruments and accessories required ............................................................................................. 6

Installing the software .................................................................................................................... 7

View software version .................................................................................................................... 7

Application directories ................................................................................................................... 8

File name extensions ...................................................................................................................... 9

Operating basics

Launch the application .................................................................................................................. 11

Application panels overview ........................................................................................................ 12

Global application controls ........................................................................................................... 13

Application controls ................................................................................................................ 13

Options menu overview ........................................................................................................... 16

TekExpress instrument control settings .................................................................................. 17

View connected instruments ................................................................................................... 18

Configure email settings .......................................................................................................... 19

Setup panel ................................................................................................................................... 20

Setup panel overview .............................................................................................................. 20

Set DUT parameters ................................................................................................................ 21

Select tests ............................................................................................................................... 23

Set acquisition tab parameters ................................................................................................. 25

Set configuration tab parameters ............................................................................................. 26

Set preferences tab parameters ................................................................................................ 29

Status panel ................................................................................................................................... 30

Status panel overview .............................................................................................................. 30

Results panel ................................................................................................................................. 31

Results panel overview ............................................................................................................ 31

TekExpress® 100G-TXE Printable Application Help i

Table of Contents

View test-related files .............................................................................................................. 32

Plots panel ..................................................................................................................................... 33

Plots panel overview ............................................................................................................... 33

Reports panel ................................................................................................................................ 35

Reports panel overview ........................................................................................................... 35

Select report options ................................................................................................................ 36

View a report ........................................................................................................................... 37

Report contents ........................................................................................................................ 38

Running tests

Equipment connection diagram .................................................................................................... 39

Prerequisite ................................................................................................................................... 47

Compensate the signal path ..................................................................................................... 47

Deskew .................................................................................................................................... 47

Running tests ................................................................................................................................ 49

Saving and recalling test setup

Test setup files overview .............................................................................................................. 51

Save a test setup ............................................................................................................................ 51

Open (load) a saved test setup ...................................................................................................... 52

Create a test setup from default settings ....................................................................................... 52

Create a test setup using an existing one ...................................................................................... 52

CAUI4 TXE compliance measurements

DC common mode output voltage ................................................................................................ 53

Diff peak-to-peak output voltage - Tx disabled ............................................................................ 54

Diff peak-to-peak output voltage - Tx enabled ............................................................................ 54

AC common mode output voltage ................................................................................................ 55

Single ended output voltage ......................................................................................................... 56

Signaling rate ................................................................................................................................ 57

Eye width and Eye height ............................................................................................................. 58

Vertical eye closure ...................................................................................................................... 60

Transition time .............................................................................................................................. 61

CR4 / KR4 TXE compliance measurements

DC common mode output voltage ................................................................................................ 63

Diff peak-to-peak output voltage - Tx disabled ............................................................................ 64

ii TekExpress® 100G-TXE Printable Application Help

Diff peak-to-peak output voltage - Tx enabled ............................................................................ 65

AC common mode output voltage ................................................................................................ 66

Signaling rate ................................................................................................................................ 67

Output Jitter .................................................................................................................................. 68

Even-odd jitter peak to peak .................................................................................................... 68

Effective bounded and total uncorrelated jitter peak-to-peak ................................................. 68

Signal to noise and distortion ratio ............................................................................................... 69

Transmitter waveform requirements ............................................................................................ 70

Common procedure for transmitter waveform requirements .................................................. 70

Linear fit pulse peak ................................................................................................................ 71

Steady state voltage ................................................................................................................. 71

Minimum pre-cursor full scale ratio ........................................................................................ 72

Minimum post-cursor full scale ratio ...................................................................................... 72

Normalized coefficient step size ............................................................................................. 73

Coefficient initialization ratio ................................................................................................. 74

Table of Contents

SCPI commands

About SCPI command .................................................................................................................. 77

Socket configuration for SCPI commands ................................................................................... 77

TEKEXP:*IDN? ........................................................................................................................... 85

TEKEXP:*OPC? .......................................................................................................................... 85

TEKEXP:ACQUIRE_MODE ...................................................................................................... 86

TEKEXP:ACQUIRE_MODE? .................................................................................................... 86

TEKEXP:EXPORT ...................................................................................................................... 87

TEKEXP:INFO? ........................................................................................................................... 87

TEKEXP:INSTRUMENT ............................................................................................................ 88

TEKEXP:INSTRUMENT? .......................................................................................................... 88

TEKEXP:LASTERROR? ............................................................................................................. 89

TEKEXP:LIST? ............................................................................................................................ 89

TEKEXP:MODE .......................................................................................................................... 90

TEKEXP:MODE? ........................................................................................................................ 91

TEKEXP:POPUP ......................................................................................................................... 91

TEKEXP:POPUP? ........................................................................................................................ 92

TEKEXP:REPORT ...................................................................................................................... 92

TEKEXP:REPORT? ..................................................................................................................... 93

TEKEXP:RESULT? ..................................................................................................................... 93

TEKEXP:SELECT ....................................................................................................................... 94

TEKEXP:SELECT? ..................................................................................................................... 95

TEKEXP:SETUP .......................................................................................................................... 95

TekExpress® 100G-TXE Printable Application Help iii

Table of Contents

TEKEXP:STATE ......................................................................................................................... 96

TEKEXP:STATE? ........................................................................................................................ 96

TEKEXP:VALUE ........................................................................................................................ 97

TEKEXP:VALUE? ...................................................................................................................... 98

Command parameters list ............................................................................................................. 99

Examples ................................................................................................................................... 105

References

Parameters .................................................................................................................................. 107

About application parameters ................................................................................................ 107

Setup panel configuration parameters ................................................................................... 107

Reports panel parameters ...................................................................................................... 111

iv TekExpress® 100G-TXE Printable Application Help

Welcome

Welcome to the Tektronix 100G-TXE, an Tektronix oscilloscope application software that addresses 100GBASE-CR4, 100GBASE-KR4, and CAUI-4 standards of IEEE. These three electrical standards make up the backbone of the current 100G Ethernet industry, and the TekExpress 100G-TXE automation test solution facilitates turnkey electrical transmitter validation of most 100G Ethernet systems today.

The 100G-TXE solution specifically targets Annex 83 of the IEEE 802.3bm standard as well as sections 92 and 93 of the IEEE 802.3bj specification. These tools allow quick verification to these IEEE electrical standards, while offering comprehensive test automation, results margining, data logging, and results reporting in an advanced testing framework.

TekExpress® 100G-TXE Printable Application Help v

Welcome

Key features of TekExpress 100G-TXE include:

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100G-TXE offers Transmitter 100GBASE-CR4 time domain transmitter characterization, tracking Table 92-6 Transmitter characteristics at TP2 from the IEEE 802.3bj cabled I/O specification. This offers a checklist approach to performing all jitter, Linear impulse response pulse peak and Signal to Noise and Distortion Ratio measurements, as well as basic AC parametric and timing operations.

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100G-TXE also incorporates 100GBASE-KR4 time domain transmitter characterization, tracking Table 93-4 Transmitter characteristics at TP0a from the IEEE 802.3bj backplane specification. While the measurements are identical to 100GBASE-CR4, the electrical limits for 100GBASE-KR4 are more stringent.

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100G-TXE includes a third electrical test suite, for Annex 83 of IEEE

802.3bm, tracking Chip-to-module 100 Gb/s four-lane Attachment Unit Interface (CAUI-4), Table 83E-1 at TP1a and TP4. The user can characterize the DUT for Host output and Module output by selecting the required test points. The CAUI-4 support offers advance CTLE scanning provisions to find optimal eye opening/width.

vi TekExpress® 100G-TXE Printable Application Help

Getting help and support

Conventions

Help uses the following conventions:

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The term "Application," and "Software" refers to the TekExpress 100G-TXE Solution application.

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The term "CAUI4" refers to CAUI-4, IEEE 802.3bm standard.

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The term "KR4 / CR4" refers to 100GBASE-KR4 or 100GBASE-CR4, IEEE

802.3bj standard.

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The term “DUT” is an abbreviation for Device Under Test.

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The term “select” is a generic term that applies to the two methods of choosing a screen item (button, control, list item): using a mouse or using the touch screen.

Table 2: Icon descriptions

Icon Meaning

This icon identifies important information.

Technical support

This icon identifies conditions or practices that could result in loss of data.

This icon identifies additional information that will help you use the application more efficiently.

Tektronix values your feedback on our products. To help us serve you better, please send us your suggestions, ideas, or comments on your application or oscilloscope. Contact Tektronix through mail, telephone, or the Web site. See

Contacting Tektronix at the front of this document for contact information.

When you contact Tektronix Technical Support, please include the following information (be as specific as possible):

2 TekExpress® 100G-TXE Printable Application Help

Getting help and support

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General information

All instrument model numbers

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Hardware options, if any

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Modules used

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

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

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Application specific

information

Software version number

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

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If possible, save the setup files for all the instruments used and the application

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If possible, save the TekExpress setup files, log.xml, *.TekX (session files and folders), and status messages text file

TekExpress® 100G-TXE Printable Application Help 3

Getting help and support

4 TekExpress® 100G-TXE Printable Application Help

Getting started

Minimum system requirements

The following table shows the minimum system requirements to install and run the TekExpress 100G-TXE solution.

Table 3: System requirements

Component Description

Oscilloscope

Processor Same as the oscilloscope

Operating System Same as the oscilloscope:

Memory Same as the oscilloscope

Hard Disk Same as the oscilloscope

Display Super VGA resolution or higher video adapter (800 x 600 minimum video

Firmware

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Tektronix DPO70K series scope

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Opt DJA and DJAN

resolution for small fonts or 1024 x 768 minimum video resolution for large fonts). The application is best viewed at 96 dpi display settings

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Frimware Version: 10.6.0 or above

Software

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IronPython 2.7.3 installed

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PyVisa 1.0.0.25 installed

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Microsoft .NET 4.0 Framework

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Microsoft Internet Explorer 7.0 SP1 or greater, or other Web browser for viewing reports

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Adobe Reader software 7.0 or greater for viewing portable document format (PDF) files

If TekExpress is running on an instrument that has a video resolution less than 800x600, connect and configure a second monitor to the instrument.

TekExpress® 100G-TXE Printable Application Help 5

Getting started

Instruments and accessories required

TekExpress100G-TXE application is launched on DPO70K series scope. The following table lists the instruments and accessories required for this application.

Table 4: Instruments and accessories required for 100G-TXE application

Instrument/Accessory Model number Quantity

Oscilloscope DPO72304SX, DPO72304DX,

MSO72304DX, DPO72504DX, MSO72504DX, DPO73304SX, DPO73304DX, MSO73304DX, DPO75002SX, DPO75902SX, DPO77002SX, DPS75004SX, DPS75904SX, DPS77004SX

Adapter

Broadband Balun with bandwidth >= 40 GHz

Cables Compatible SMA cables with

bandwidth greater than 40 GHz for connecting single ended sources ATI channel.

Fixtures

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Host compliance board for CAUI4 at TP1a and CR4 at TP2

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Module compliance board for CAUI4 at TP4

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Transmitter test fixture for KR4 at TP0a

DC Blocks Compatible DC block with

bandwidth range 50 KHz to 65 GHz

Attenuator 3, 6, or 10 dB attenuators 2

Probes

Tektronix P7600 or P7700 series

Required to operate in differential mode for single stack ATI scopes.

If required, De-Embed the fixtures using filter files.

Required to acquire signal at TP0a test point for KR4 suite.

6 TekExpress® 100G-TXE Printable Application Help

Installing the software

Getting started

Complete the following steps to download and install the latest 100G-TXE application. See Minimum system requirements for compatibility.

1. Go to www.tek.com.

2. Click Downloads. In the Downloads menu, select DOWNLOAD TYPE as

Software and enter 100G-TXE in the MODEL OR KEYWORD field and click SEARCH.

3. Select the latest version of software and follow the instructions to download. Copy the executable file to the oscilloscope.

View software version

4. Double-click the executable and follow the on-screen instructions. The software is installed at C:\Program Files\Tektronix\TekExpress\100G-TXE\.

5. Select Analyze > 100G-TXE from the TekScope menu to Launch the

application.

Use the following instructions to view version information for the application and for the application modules such as the Programmatic Interface and the Programmatic Interface Client.

To view version information for 100G-TXE, click button in the TekExpress application and select About TekExpress.

TekExpress® 100G-TXE Printable Application Help 7

Getting started

NOTE. This example shows a typical Version Details dialog box, and may not reflect the actual values as shown when you open this item in the application.

Application directories

TekExpress 100G-TXE

application

The TekExpress 100G-TXE application files are installed at the following location:

C:\Program Files\Tektronix\TekExpress\TekExpress 100G-TXE

The following table lists the application directory names and their purpose.

Table 5: Application directories and usage

Directory names Usage

Bin Contains TekExpress 100G-TXE application libraries

Compliance Suites Contains compliance-specific files

Examples Contains various support files

ICP Contains instrument and TekExpress 100G-TXE application-

specific interface libraries

Images Contains images of the TekExpress 100G-TXE application

Lib Contains utility files specific to the TekExpress 100G-TXE

application

Report Generator Contains style sheets for report generation

Tools Contains instrument and TekExpress 100G-TXE application-

specific files

8 TekExpress® 100G-TXE Printable Application Help

Getting started

See also

File name extensions

View test-related files

File name extensions

The TekExpress 100G-TXE application uses the following file name extensions:

File name extension Description

.TekX Application session files (the extensions may not be displayed)

.py Python sequence file

.xml Test-specific configuration information (encrypted) files

Application log files

.csv Test result reports

Plot data

.mht Test result reports (default)

Test reports can also be saved in HTML format

.pdf Test result reports

Application help document

.xslt Style sheet used to generate reports

See also

View test-related files

Application directories

TekExpress® 100G-TXE Printable Application Help 9

Getting started

10 TekExpress® 100G-TXE Printable Application Help

Operating basics

Launch the application

To launch the TekExpress 100G-TXE solution, select Analyze > TekExpress 100G-TXE from the TekScope menu.

When you launch the application for the first time, the file C:\Users\<username> \My Documents\My TekExpress\100G-TXE\Resources.xml is mapped to drive X:. This file contains information about available network-connected instruments. The session files are stored in X:\100G-TXE\. If this file is not found, then the application runs Instrument Discovery Program to detect the network-connected instruments before launching 100G-TXE solution.

If the application is behind the oscilloscope application, click Analyze > TekExpress 100G-TXE to bring it to the front. To keep the 100G-TXE application window on top, select Keep On Top from the 100G-TXE Options

menu.

TekExpress® 100G-TXE Printable Application Help 11

Operating basics

See also

Application controls

Application panel overview

Application panels overview

TekExpress 100G-TXE solution uses panels to group Configuration, Results, and Reports settings. Click any button to open the associated panel. A panel may have one or more tabs that list the selections available in that panel. Controls in a tab can change depending on settings made in the same tab or another tab.

12 TekExpress® 100G-TXE Printable Application Help

Operating basics

Table 6: Application panels overview

Panel Name Purpose

Setup panel The Setup panel shows the test setup controls. Click the Setup button to

open this panel. Use this panel to:

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Set DUT tab parameters

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Select tests

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Set acquisition tab parameters

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Set configuration tab parameters

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Set preferences tab parameters

Status panel View the progress and analysis status of the selected tests, and view test

logs.

Results panel View the summary of test results and select result viewing preferences.

Reports panel Browse for reports, save reports as specific file types, specify report

naming conventions, select report content to include (summary information, detailed information, user comments, setup configuration, application configuration), and select report viewing options.

See also

Application controls

Global application controls

Application controls

This section describes the application controls.

TekExpress® 100G-TXE Printable Application Help 13

Operating basics

Table 7: Application controls description

Item Description

Options menu

Test Panel buttons

To select global application controls.

Controls that open tabs for configuring test settings and options.

Start / Stop button

Pause / Continue button

Clear button

Use the Start button to start the test run of the measurements in the selected order. If prior acquired measurements are not cleared, then new measurements are added to the existing set. The button toggles to the Stop mode while tests are running. Use the Stop button to abort the test.

Use the Pause button to pause the acquisition. When a test is paused, this button changes as Continue.

Use the Clear button to clear all existing measurement results. Adding or deleting a measurement, or changing a configuration parameter of an existing measurement, also clears measurements. This is to prevent the accumulation of measurement statistics or sets of statistics that are not coherent. This button is available only on Results panel.

14 TekExpress® 100G-TXE Printable Application Help

Operating basics

Item Description

Application window move icon

Minimize icon

Close icon

Place the cursor over the three-dot pattern in the upper left corner of the application window. When the cursor changes to a hand, drag the window to the desired location.

Click to minimize the application.

Click to close the application.

Mini view / Normal view

Toggles the application between mini view and normal view. Mini view displays the run messages with the time stamp, progress bar, Start / Stop button, and Pause / Continue button. The application moves to mini view when you click the Start button.

Options menu overview

To access Options menu, click in the upper-right corner of the application. It has the following:

Options menu

Menu Function

Default Test Setup Opens an untitled test setup with defaults selected

Acquire Live Waveforms

Mode: User Defined Standards: CAUI4 Specification: IEEE802.3bm, Annex 83E.3.1 Data rate: 25.78125 Pattern Type: PRBS9 Source: Single ended

Open Test Setup Opens a saved test setup

Save Test Setup Saves the current test setup

Save Test Setup As Saves the current test setup with a different file name or file type

Open Recent Displays the recently opened test setups to open

Instrument Control Settings

Keep On Top Keeps the TekExpress 100G-TXE application on top of all the application

Email Settings Use to configure email options for test run and results notifications

Deskew Allows to read the skew and attenuation values from the TekScope

Detects, lists, and refreshes the connected instruments found on specified connections (LAN, GPIB, USB, and so on)

application. Before using this option, manually compensate for skew and attenuations in Tekscope application.

16 TekExpress® 100G-TXE Printable Application Help

Menu Function

Help Displays the TekExpress 100G-TXE help

About TekExpress

■

Displays application details such as software name, version number, and copyright

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Provides a link to the end-user license agreement

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Provides a link to the Tektronix Web site

Operating basics

Configure email settings

Use the Email Settings utility to get notified by email when a measurement completes, or produces any error condition. Follow the steps to configure email settings:

1. Select Options > Email Settings to open the Email Settings dialog box.

2. (Required) For Recipient email Address(es), enter one or more recipient

email addresses. To include multiple addresses, separate the addresses with commas.

3. (Required) For Sender’s Address, enter the email address used by the instrument. This address consists of the instrument name, followed by an underscore, followed by the instrument serial number, then the @ symbol, and the email server ID. For example: user@yourcompany.com.

4. (Required) In the Server Configuration section, type the SMTP Server address of the Mail server configured at the client location, and the SMTP Port number, in the corresponding fields.

If this server requires password authentication, enter a valid login name, password, and host name in the corresponding fields.

NOTE. If any of the above required fields are left blank, the settings will not be saved and email notifications will not be sent.

5. In the Email Attachments section, select from the following options:

■

Reports: Select to receive the test report with the notification email.

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Status Log: Select to receive the test status log with the notification email. If you select this option, then also select whether you want to receive the full log or just the last 20 lines.

6. In the Email Configuration section:

■

Enter a maximum file size for the email message. Messages with attachments larger than this limit will not be sent. The default is 5 MB.

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Enter the number in the Number of Attempts to Send field, to limit the number of attempts that the system makes to send a notification. The default is 1. You can also specify a timeout period.

7. Select the Email Test Results When complete or on error check box. Use this check box to quickly enable or disable email notifications.

8. To test your email settings, click Test Email.

9. To apply your settings, click Apply.

10. Click Close when finished.

TekExpress® 100G-TXE Printable Application Help 19

Operating basics

Email Settings

Setup panel

Setup panel overview

The Setup panel contains sequentially ordered tabs that help you guide through the test setup and execution process.

20 TekExpress® 100G-TXE Printable Application Help

Operating basics

Set DUT parameters

Use the DUT tab to select parameters for the device under test. These settings are global and apply to all tests of current session. DUT settings also affect the list of available tests in the Test Selection tab.

TekExpress® 100G-TXE Printable Application Help 21

Operating basics

Click Setup > DUT to access the DUT parameters:

Table 8: DUT tab settings

Setting Description

DUT ID Adds an optional text label for the DUT to reports. The default

value is DUT001. The maximum number of characters is 32. You cannot use the following characters in an ID name: (.,..,..., \,/:?”<>|*)

Opens Comments dialog box to enter text to add to the report.

Comments icon (to the

right of the DUT ID field)

Acquire live waveforms Perform analysis on live waveforms.

Use pre-recorded waveform files

Mode

Standards Test Points Specification

CAUI4

Maximum size is 256 characters. To enable or disable comments appearing on the test report, see Select report options.

Perform analysis on pre-recorded waveforms.

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Compliance

■

User Defined

TP1a IEEE802.3bm, Annex 83E.3.1

TP4 IEEE802.3bm, Annex 83E.3.2

CAUI4 (CAUI-4) is 100G chip-to-module IEEE 802.3bm interface, operating on four 25 Gb/s lanes.

22 TekExpress® 100G-TXE Printable Application Help

Operating basics

Setting Description

KR4

CR4

TP0a IEEE802.3bj, Section 93

TP2 IEEE802.3bj, Section 92

Data Rate Set the data rate to be tested within the range 18 to 28.05. The

default value is 25.78125

Pattern Type Select the pattern type. The available options are PRBS7, 9, 11,

and 15. By default, it is PRBS9.

Source

■

Differential - Source as differential signal

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Single Ended -Source as single-ended signals

Crosstalk Source Select crosstalk source when cross talk generator is connected.

This is applicable for Eye width and Eye height measurements only.

Select tests

Use the Test Selection tab to select the tests. The test measurements available depends on the standards selected in the DUT tab.

Figure 1: CAUI4 TX measurements

KR4 (100GBASE-KR4) is an Ethernet IEEE 802.3bj standard for 100G backplanes.

CR4 (100GBASE-CR4) is an Ethernet IEEE802.3bj standard for 100G over twin-axial cables.

TekExpress® 100G-TXE Printable Application Help 23

Operating basics

Figure 2: KR4 TX measurements

Figure 3: CR4 TX measurements

24 TekExpress® 100G-TXE Printable Application Help

Operating basics

Table 9: Test Selection tab settings

Setting Description

Tests Click on a test to select or unselect. Highlight a

test to show details in the Test Description pane.

Test Description Shows brief description of the highlighted test in

the Test field.

Status panel

Status panel overview

The Status panel accesses the Test Status and Log View tabs, which provide status on test acquisition and analysis (Test Status) and a listing of test tasks performed (Log View tab). The application opens the Test Status tab when you start a test run. You can select the Test Status or the Log View tab to view these items while tests are running.

Test status view

Log view

30 TekExpress® 100G-TXE Printable Application Help

Results panel

Operating basics

Table 13: Status panel Log View controls

Control Description

Message History Lists all executed test operations and timestamp

information.

Auto Scroll Enables automatic scrolling of the log view as

information is added to the log during the test.

Clear Log Clears all messages from the log view.

Save Saves the log file to a text file. Use the standard

Save File window to navigate to and specify the folder and file name to which to save the log text.

Results panel overview

When a test execution is complete, the application automatically opens the Results panel to display a summary of test results.

TekExpress® 100G-TXE Printable Application Help 31

Operating basics

View test-related files

Files related to tests are stored in My TekExpress\100G-TXE\ . Each test setup in this folder has both a test setup file and a test setup folder, both with the test setup name.

The test setup file is preceded by the TekExpress icon and usually has no visible file name extension.

Inside the test setup folder is another folder named for the DUT ID used in the test sessions. The default is DUT001.

Inside the DUT001 folder are the session folders and files. Each session also has a folder and file pair, both named for the test session using the naming convention (date)_(time). Each session file is stored outside its matching session folder:

Each session folder contains image files of any plots generated from running the test session. If you selected to save all waveforms or ran tests using prerecorded waveform files, these are included here.

The first time you run a new, unsaved session, the session files are stored in the Untitled Session folder located at ..\My TekExpress\100G-TXE\. When you name and save the session, the files are placed in a folder with the name that you specify. A copy of the test files stay in the Untitled Session folder until you run a new test or until you close the 100G-TXE application.

Plots panel

Plots panel overview

The Plots panel displays the result as a two-dimensional plot for additional measurement analysis. The plots are displayed only during run and only for the measurements which supports plots.

TekExpress® 100G-TXE Printable Application Help 33

Operating basics

Toolbar functions in plot windows. The Plot Toolbar window includes the following functions:

Icon Functions

Save

Select & Zoom

Zoom In

Saves the plot.

Expands the selected plot area. Left-click and drag the mouse to mark the region on the plot to zoom.

Expands part of the plot (Horizontal and Vertical); the data appears in more detail.

Contracts part of the plot (Horizontal and Vertical); the data appears in less detail.

Zoom Out

Pan

Hide Gridlines

Reset

Choose Waveform Colors

Moves the plot anywhere within the scale.

Hides the gridlines.

Resets the zoom to 100%.

Sets the plot color. Click and select the color in the Color window and click OK. Click in the plot area to apply the color.

34 TekExpress® 100G-TXE Printable Application Help

Reports panel

Icon Functions

Show/Hide Markers

UnDock/Dock

Select Test Select the measurement.

Displays or hides the markers

Click to undock/dock the plot window.

Operating basics

Reports panel overview

Use Reports panel to browse for reports, name and save reports, select test content to include in reports, and select report viewing options.

For information on setting up reports, see Select report options. For information on viewing reports, see View a report.

TekExpress® 100G-TXE Printable Application Help 35

Operating basics

Select report options

Click Reports panel and use the Reports panel controls to select which test result information to include in the report, and the naming conventions to use for the report. For example, always give the report a unique name or select to have the same name increment each time you run a particular test.

Select report options before running a test or when creating and saving test setups. Report settings are included in saved test setups.

In the Reports panel, select from the following report options:

Table 14: Report options

Setting Description

Report Update Mode

Generate new report Creates a new report. The report can be in either .mht or .pdf file formats.

Append with previous run session Appends the latest test results to the end of the current test results report.

Include header in appended reports Select to include header in appended reports

Replace current test in previous run session Replaces the previous test results with the latest test results. Results from newly added

tests are appended to the end of the report.

Report Creation Settings

Report name Displays the name and location from which to open a 100G-TXE report. The default

location is at \My TekExpress\100G-TXE\Untitled Session. The report file in this folder gets overwritten each time you run a test unless you specify a unique name or select to auto increment the report name. Change the report name or location.

Do one of the following:

■

In the Report Path field, type over the current folder path and name.

■

Double-click in the Report Path field and then make selections from the popup keyboard and click the Enter button.

Be sure to include the entire folder path, the file name, and the file extension. For example: C:\Documents and Settings\your user name\My Documents\My TekExpress\100G-TXE \DUT001.mht.

NOTE. You cannot set the file location using the Browse button.

Open an existing report.

Click Browse, locate and select the report file and then click View at the bottom of the panel.

Save as type Saves a report in the specified file type, selected from the drop-down list.

NOTE. If you select a file type different from the default, be sure to change the report file name extension in the Report Name field to match.

36 TekExpress® 100G-TXE Printable Application Help

Setting Description

Auto increment report name if duplicate Sets the application to automatically increment the name of the report file if the application

finds a file with the same name as the one being generated. For example: DUT001, DUT002, DUT003. This option is enabled by default.

Create report automatically at the end of the run

Contents To Save

Include pass/fail info in details table Includes pass/fail info in the details table of the report.

Include detailed results Includes detailed results in the report.

Include plot images Includes plot images in the report.

Include setup configuration Sets the application to include hardware and software information in the summary box at

Margin value in percentage Select to include the margin value in percentage in the report.

Include user comments Select to include any comments about the test that you or another user added in the DUT

Group Report By

Test Name Select to group the tests in the report by test name.

Test Result Select to group the tests in the report by test results

Creates report at the end of the run.

the top of the report. Information includes: the oscilloscope model and serial number, the oscilloscope firmware version, and software versions for applications used in the measurements.

tab of the Setup panel. Comments appear in the Comments section, under the summary box at the beginning of each report.

Operating basics

View report after generating Automatically opens the report in a Web browser when the test completes. This option is

selected by default.

View Click to view the most current report.

Generate Report Generates a new report based on the current analysis results.

Save As Specify a name for the report.

View a report

The application automatically generates a report when test execution is complete and displays the report in your default Web browser (unless you cleared the View Report After Generating check box in the Reports panel before running the test). If you cleared this check box, or to view a different test report, do the following:

1. Click the Reports button.

2. Click the Browse button and locate and select the report file to view.

3. In the Reports panel, click View.

For information on changing the file type, file name, and other report options, see

Select report options.

TekExpress® 100G-TXE Printable Application Help 37

Operating basics

Report contents

A report shows detailed results and plots, as set in the Reports panel.

Setup configuration information

The summary box at the beginning of the report lists setup configuration information. This information includes the oscilloscope model and serial number, optical module model and serial number, and software version numbers of all associated applications.

To exclude this information from a report, clear the Include Setup Configuration check box in the Reports panel before running the test.

User comments

If you selected to include comments in the test report, any comments you added in the DUT tab are shown at the top of the report.

Running tests

Equipment connection diagram

Click Setup > Test Selection > Schematic to view the equipment setup diagram(s).

Figure 5: CAUI4 TP1a (Single ended)

Figure 6: CAUI4 TP1a (Differential)

TekExpress® 100G-TXE Printable Application Help 39

Running tests

Figure 7: CAUI4 TP4 (Single ended)

Figure 8: CAUI4 TP4 (Differential)

40 TekExpress® 100G-TXE Printable Application Help

Running tests

Figure 9: CAUI4 Eye Width / Eye Height TP1a (Single ended)

TekExpress® 100G-TXE Printable Application Help 41

Running tests

Figure 10: CAUI4 Eye Width / Eye Height TP1a (Differential)

42 TekExpress® 100G-TXE Printable Application Help

Running tests

Figure 11: CAUI4 Eye Width / Eye Height TP4 (Single ended)

TekExpress® 100G-TXE Printable Application Help 43

Running tests

Figure 12: CAUI4 Eye Width / Eye Height TP4 (Differential)

Figure 13: CR4 TP2 (Single ended)

44 TekExpress® 100G-TXE Printable Application Help

Running tests

Figure 14: CR4 TP2 (Differential)

Figure 15: KR4 TP0a (Single ended)

TekExpress® 100G-TXE Printable Application Help 45

Running tests

Figure 16: KR4 TP0a (Differential)

46 TekExpress® 100G-TXE Printable Application Help

Prerequisite

Running tests

Compensate the signal

path

Use the following procedure to compensate the internal signal acquisition path. Perform this procedure if the ambient temperature has changed more than 5 °C (9 °F) since you performed the last signal path compensation. Perform the signal path compensation once a week. Failure to do so may result in the instrument not meeting warranted performance levels.

1. Power on and wait for the instrument to complete its warm up period before continuing with this procedure.

2. Disconnect any probes you have connected to the input channels.

3. Set the instrument to Menu mode.

4. Select Instrument Calibration from the Utilities menu.

5. Note any instructions that appear in the resulting control window.

6. Click Run SPC to begin the procedure. The procedure may take several

minutes to complete.

7. Verify that the Status changes to Compensated after the procedure is complete. If the Calibration Status field indicates anything other than Compensated, see Signal Path Compensation Status for information on the readout and recommended action.

NOTE. When making measurements at vertical scale settings less than or equal to 5 mV, you should perform the signal path compensation at least once a week. Failure to do so may result in the instrument not meeting warranted performance levels at those volts/div settings.

Deskew

TekExpress® 100G-TXE Printable Application Help 47

If skew is present between positive and negative channels, then the channels need to be deskewed before being used for waveform measurements. TekExpress 100G-TXE provides support for channel deskew and attenuation using the following method:

1. Determine what the skew is for each channel.

2. From the TekScope menu, select Vertical > Deskew.

3. In the Deskew/Attenuation window, click the channel (1 – 4) button for the

first channel to be deskewed.

4. Click in the Ch(x) Deskew Time entry field and enter the skew. The skew can be +ve or –ve.

5. Click the channel button for the next channel and repeat step 4.

6. After entering the skew for all the channels that require it, from the Options

menu in TekExpress 100G-TXE, select Deskew.

Running tests

7. In the Deskew dialog box, select the desired level:

■

Less than 100 mV signal amplitude: Select this if the signal amplitude is such that the oscilloscope’s vertical setting is less than 100 mV/division.

■

100 mV or greater signal amplitude: Select this if the signal amplitude is such that the oscilloscope’s vertical setting is greater than 100 mV/ division.

Figure 17: Deskew

8. Click Read Deskew/Attn.

9. When the status in the dialog box indicates the deskew is finished, click

Close.

Each input channel has its own deskew settings. Deskew compensates individual channels for probes or cables of different lengths. The instrument applies the delay values after each completed acquisition. The deskew values are saved as part of the instrument setup. The deskew values for the selected channel are retained until you change the probe, you restore a saved setup, or you recall the factory setup.

48 TekExpress® 100G-TXE Printable Application Help

Running tests

Select tests, set acquisition parameters, set configuration parameters, set preferences parameters, and click Start to run the tests. While tests are running,

you cannot access the Setup or Reports panels. To monitor the test progress, switch between the Status panel and the Results panel.

While the tests are running, other applications may display windows in the background. The TekScope application takes precedence over other applications, but you can switch to other applications by using Alt + Tab key combination. To keep the TekExpress 100G-TXE application on top, select Keep On Top from the TekExpress Options menu.

The application displays report when the tests execution is complete.

Prerun checklist

1. Make sure that the instruments are warmed up (approximately 20 minutes) and stabilized.

2. Perform compensation: In the oscilloscope main menu, select Utilities > Instrument Compensation. Click Help in the compensation window for

steps to perform instrument compensation.

TekExpress® 100G-TXE Printable Application Help 49

Running tests

50 TekExpress® 100G-TXE Printable Application Help

Saving and recalling test setup

Test setup files overview

Saved test setup information (such as the selected oscilloscope, general parameters, acquisition parameters, measurement limits, waveforms (if applicable), and other configuration settings) are saved under the setup name at X:\100G-TXE.

Use test setups to:

■

Run a new session, acquiring live waveforms, using a saved test configuration.

■

Create a new test setup using an existing one.

■

View all the information associated with a saved test, including the log file, the history of the test status as it executed, and the results summary.

■

Run a saved test using saved waveforms.

See also

Save a test setup

Open (load) a saved test setup

You can save a test setup before or after running a test. You can create a test setup from already created test setup, or using default test setup. When you select the default test setup, the parameters are set to the application’s default value.

Select Options > Save Test Setup to save the opened setup.

Select Options > Save Test Setup As to save the setup with different name.

TekExpress® 100G-TXE Printable Application Help 51

Saving and recalling test setup

Open (load) a saved test setup

To Open (load) a saved test setup, do the following:

1. Select Options > Open Test Setup.

2. Select the setup from the list and click Open. Setup files are located at X: \100G-TXE\.

See also

About test setups

Create a test setup using an existing one

Create a test setup from default settings

To create a test setup using default settings, follow the steps:

1. Select Options > Default Test Setup. For default test setup, the parameters are set to the application’s default value.

2. Click application Setup and set the parameters

3. Click application Reports and set the report options

4. Optional: Click Start to run the test and verify that it runs correctly and

captures the specified test information and reports. If it does not, then edit the parameters and repeat this step until the test runs to your satisfaction

5. Select Options > Save Test Setup. Enter the file name and click Save. The application saves the file to X:\100G-TXE\<session_name>

Create a test setup using an existing one

To create a test setup using an existing one, follow the steps:

1. Select Options > Open Test Setup

2. Select a setup from the list and then click Open

3. Click application Setup and modify the parameters

4. Click application Reports and modify the report options

5. Select Options > Save Test Setup As

6. Enter test setup name, and click Save

52 TekExpress® 100G-TXE Printable Application Help

CAUI4 TXE compliance measurements

DC common mode output voltage

This section verifies that the mean of the common mode signal is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.2, Table 83E-1

TP4 IEEE 802.3bm, Section 83E.3.1.2, Table 83E-3

Measurement procedure

The supported voltage range of ATI channel of the scope is ±0.3 V and the DC voltage of the DUT can be beyond the supported voltage limits. Hence, use external digital multimeter to measure the voltage and enter it in the application.

Limits

At TP1a: -0.3 V to 2.8 V

At TP4: -0.35 V to 2.85 V

TekExpress® 100G-TXE Printable Application Help 53

CAUI4 TXE compliance measurements

Diff peak-to-peak output voltage - Tx disabled

This section verifies that the peak-to-peak differential output voltage when the transmitter is disabled is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.2, Table 83E-1

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) without any filtering.

Measurement procedure

1. Add Peak-to-Peak measurement.

2. The value of the pk-pk voltage is the differential output voltage (pk-pk).

Limits

At TP1a:

■

Lower limit: NA

■

Higher limit: 35 mV

Diff peak-to-peak output voltage - Tx enabled

This section verifies that the peak-to-peak differential output voltage is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.2, Table 83E-1

TP4 IEEE 802.3bm, Section 83E.3.1.2, Table 83E-3

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

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CAUI4 TXE compliance measurements

Measurement procedure

1. Add Peak-to-Peak measurement.

2. The value of the pk-pk voltage is the differential output voltage (pk-pk).

Limits

At TP1a and TP4:

■

Lower limit: NA

■

Higher limit: 900 mV

AC common mode output voltage

This section verifies that the RMS value of the common mode signal is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.2, Table 83E-1

TP4 IEEE 802.3bm, Section 83E.3.1.2, Table 83E-3

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. Create a common mode signal using Math = (Data Positive + Data Negative)/

2. Create Vertical histogram on the common mode signal.

3. Add Standard deviation measurement.

4. Standard deviation of the signal is measured as AC common mode voltage.

Limits

At TP1a and TP4:

■

Lower limit: NA

■

Higher limit: 17.5 mV

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CAUI4 TXE compliance measurements

Single ended output voltage

This section verifies that the max and min of data positive and negative signals are within conformable limits as per the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.2, Table 83E-1

Inputs

■

Two single ended sources (Positive and Negative) filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. Find the max and min of the signal using base scope measurement option (select Measure > Amplitude. Select Maximum and Minimum).

2. Single Ended output voltage (max) = DC Common mode voltage + Max of

Single Ended signal (without DC).

3. Single Ended output voltage (min) = DC Common mode voltage + Min of Single Ended signal (without DC).

4. Perform Step 2 and 3 on single ended data positive and data negative signals.

Limits

At TP1a:

■

Lower limit: -0.4 V

■

Higher limit: 3.3 V

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CAUI4 TXE compliance measurements

Signaling rate

This section verifies that the signaling rate (data rate) of the DUT per lane is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.1, Table 83E-1

TP4 IEEE 802.3bm, Section 83E.3.1.1, Table 83E-3

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. This measurement is performed using DPOJET Period measurement as

prerequisite.

2. Period is found edge to edge which gives the Unit interval (UI) of the signal.

3. The result of the period measurement (UI) is used to find the data rate of the

signal. Data Rate = 1/Unit interval.

Limits

At TP1a and TP4:

■

Lower limit: Configured Date Rate - 100 ppm

■

Higher limit: Configured Date Rate + 100 ppm

TekExpress® 100G-TXE Printable Application Help 57

CAUI4 TXE compliance measurements

Eye width and Eye height

This section verifies that the eye width and eye height are within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.6, Table 83E-1

TP4 IEEE 802.3bm, Section 83E.3.2.1, Table 83E-3

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Calibration:

Before running the Eye width / Eye height measurement, the below setup has to be calibrated with a crosstalk generator, as mentioned in the following settings:

■

For Host (TP1a): Calibrate the crosstalk generator at TP4 with target differential peak-to-peak amplitude of 900 mV and target transition time of 12 ps (section 83E.3.1.6).

■

For Module (TP4): Calibrate the crosstalk generator at TP1a with target differential peak-to-peak amplitude of 900 mV and target transition time of 19 ps (section 83E.3.2.1).

Measurement procedure

Eye width and Eye height calculation

Signal is captured such that it has more than 1e6 edges. Measurements are done using Dual-Dirac jitter model as specified in section 83E.4.

EW15 = EW6 - 3.19*(RJR + RJL)

Where,

EW15 is the eye width extrapolated to 10-15 probability

EW6 is the eye width at 10-6 probability

RJL is the RMS value of the jitter estimated from CDFL

RJR is the RMS value of the jitter estimated from CDFR

EH15 = EH6 - 3.19*(RN0+RN1)

Where,

EH15 is the eye width extrapolated to 10-15 probability

EH6 is the eye width at 10-6 probability

RN1 is the RMS value of the jitter estimated from CDF1

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CAUI4 TXE compliance measurements

RN0 is the RMS value of the jitter estimated from CDF0

Compliance method to find Eye width and Eye height results

The signal filtered through Bessel Thomson filter is equalized using different CTLE filters (1 dB - 9 dB for Host) and (1 dB - 2 dB for Module). CTLE filter result which has the maximum Eye area (Eye width * Eye height) and passing both Eye height and Eye width results is chosen as reference CTLE filter.

Host (TP1a): The CTLE peaking in the reference receiver shall be set to three values:

1. The recommended CTLE peaking value provided by the host (CTLE 1 dB to 9 dB)

2. The value 1 dB higher if present

3. The value 1 dB lower if present

A compliant host should pass both the eye width and eye height A limit using at least one of the settings and passes eye height B in two or three settings.

Module (TP4): A compliant module has to pass both eye width and eye height at least one of the CTLE settings (CTLE 1 dB to 2 dB).

Limits

At TP1a:

■

Eye Width: LL: 0.46 UI and UL: NA

■

Eye Height A: LL: 95 mV and UL: NA

■

Eye Height B: LL: 80 mV and UL: NA

At TP4:

■

Eye Width: LL: 0.57 UI and UL: NA

■

Eye Height: LL: 228 mV and UL: NA

TekExpress® 100G-TXE Printable Application Help 59

CAUI4 TXE compliance measurements

Vertical eye closure

This section verifies that the vertical eye closure of the signal is within the conformable limits according to the specification IEEE 802.3bm, and Section 83E.4.2.1.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP4 IEEE 802.3bm, Section 83E.4.2.1, Table 83E-3

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. The filtered signal is equalized using reference or best CTLE filter. If

reference CTLE filter is not present, the application will loop through required CTLE filters to find the reference CTLE filter.

2. Eye height@BER of 1e-15 and Eye amplitude are calculated for the equalized signal using Dual-Dirac jitter separation model as explained section 83E.3.2.1.

3. Vertical eye closure is calculated using the following formula:

VEC = 20log(AV/EH15)

Where,

VEC is vertical eye closure in dB

AV is the eye amplitude of the equalized waveform. Eye amplitude is defined as the mean value of logic one minus the mean value of logic zero in the central 5% of the eye

EH15 is the eye height at BER of 1e-15

Limits

At TP4:

■

Lower limit: NA

■

Higher limit: 5.5 dB

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CAUI4 TXE compliance measurements

Transition time

This section verifies that the transition time of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Test points Specification

CAUI4 TP1a IEEE 802.3bm, Section 83E.3.1.5, Table 83E-1

TP4 IEEE 802.3bm, Section 83E.3.1.5, Table 83E-3

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. Measure the nominal Unit interval of the filtered signal.

2. For PRBS9, measure Voltage High in region 000001111 for Rise Time and

Voltage Low in region 11111111100000 for fall time. Within these regions, take average amplitude in -3 UI to -2 UI range from edge for finding voltage low. Also take average amplitude in 2 UI to 3 UI range from edge for finding voltage high.

3. Find the transition time in search patterns (000001111 for Rise and 11111111100000 for Fall) by taking difference in time from 20% to 80% of the signal amplitude.

Limits

At TP1a:

■

Lower limit: 10 ps

■

Higher limit: NA

At TP4:

■

Lower limit: 12 ps

■

Higher limit: NA

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CAUI4 TXE compliance measurements

62 TekExpress® 100G-TXE Printable Application Help

CR4 / KR4 TXE compliance measurements

DC common mode output voltage

This section verifies that the mean of the common mode signal is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.1, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.3, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

Measurement procedure

The supported voltage range of the scope is ±0.3 V and the DC voltage of the DUT can be beyond the supported voltage limits. Hence, use external digital multimeter to measure the voltage and enter it in the application.

Limits

CR4 0 V to 1.9 V

KR4 0 V to 1.9 V

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CR4 / KR4 TXE compliance measurements

Diff peak-to-peak output voltage - Tx disabled

This section verifies that the peak to peak differential output voltage when transmitter is disabled is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.1, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.3, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) without any filtering.

Measurement procedure

1. Add Peak to Peak measurement.

2. The value of the pk-pk voltage is measured as differential output voltage (pk-

pk).

Limits

CR4 Peak-to-Peak Differential output (Tx Disabled)

<= 35 mV

KR4 Peak-to-Peak Differential output (Tx Disabled)

<= 30 mV

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CR4 / KR4 TXE compliance measurements

Diff peak-to-peak output voltage - Tx enabled

This section verifies that the peak to peak differential output voltage is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.1, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.3, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. Add Peak to Peak measurement.

2. The value of the pk-pk voltage is measured as differential output voltage (pk-

pk).

Limits

CR4 Peak-to-Peak Differential output <= 1200 mV

KR4 Peak-to-Peak Differential output <= 1200 mV

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CR4 / KR4 TXE compliance measurements

AC common mode output voltage

This section verifies that the RMS value of the common mode signal is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.1, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.3, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. Create a common mode signal using Math = (Data Positive + Data Negative)/

2. Create Vertical histogram on the common mode signal.

3. Add Standard deviation measurement.

4. Standard deviation of the signal is measured as AC common mode voltage.

Limits

CR4 AC Common mode output voltage <= 30 mV

RMS with respect to ground

KR4 AC Common mode output voltage <= 12 mV

RMS with respect to ground

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CR4 / KR4 TXE compliance measurements

Signaling rate

This section verifies that the signaling rate (data rate) of the DUT per lane is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.9, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.2, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. This measurement is performed using DPOJET Period measurement as

prerequisite.

2. Period is found edge to edge which gives the Unit interval (UI) of the signal.

3. The result of the period measurement (UI) is used to find the data rate of the

signal. Data Rate = 1/Unit interval.

Limits

CR4 At TP1a and TP4:

■

Lower limit: Configured Date Rate 100 ppm

■

Higher limit: Configured Date Rate + 100 ppm

KR4 At TP1a and TP4:

■

Lower limit: Configured Date Rate 100 ppm

■

Higher limit: Configured Date Rate + 100 ppm

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CR4 / KR4 TXE compliance measurements

Output Jitter

Even-odd jitter peak to

peak

This section verifies that the value of the even odd jitter is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.8, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.7, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. Capture a long sequence of PRBS pattern.

2. Even Odd Jitter is measured as the magnitude of the difference between the

average deviation of all even numbered transitions and the average deviation of all odd numbered transitions, where even odd transitions are not possible transitions, but actual transitions.

Effective bounded and

total uncorrelated jitter

peak-to-peak

3. The Even Odd Jitter is carried out by DPOJET using F/n measurement with n being set to 2.

Limits

CR4 Even Odd Jitter <= 0.035 UI

KR4 Even Odd Jitter <= 0.035 UI

This section verifies that the jitter components are within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.8, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.7, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

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CR4 / KR4 TXE compliance measurements

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Measurement procedure

1. Capture PRBS signal with minimum of 2e3 edges present in the signal.

2. For calculating jitter application, consider the edges attached with long

sequence of ones and zeros. This makes sure that the only uncorrelated jitter is measured. Application performs this measurement with longer record length to get more accurate results.

3. EBUJ (Effective bounded uncorrelated jitter) and ERJ (Effective random jitter) are calculated from the signal using dual-dirac jitter analysis as given in specification section 92.8.3.8.2.

Effective total uncorrelated jitter is calculated using the equation Effective total uncorrelated jitter = 7.9 * ERJ + EBUJ.

Limits

CR4 and KR4 Effective bounded uncorrelated jitter <= 0.1 UI

Signal to noise and distortion ratio

This section verifies that the signal to noise and distortion ratio of the DUT is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.7, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.6, Table 93-4

Required test equipment

Minimum system requirements

Equipment connection diagram

Inputs

peak-to-peak

Effective total uncorrelated jitter <= 0.18 UI peak-to-peak

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

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CR4 / KR4 TXE compliance measurements

Measurement procedure

1. Configure the DUT in OPTIMAL state and capture the signal for

measurement.

2. Compute the Linear fit pulse response (Pmax) and the RMS value of the linear fit error σ(e) from the signal.

3. Measure the RMS deviation of voltage from the mean and denote it as (σ(n). This has to be measured at the flat portion of the waveform where the slope is close to zero.

4. Signal to Noise an Distortion ratio is measured using below equation:

Limits

CR4 SNDR > 26 dB

KR4 SNDR > 27 dB

Transmitter waveform requirements

Common procedure for

transmitter waveform

requirements

This section describes the general procedure to be performed for Transmitter output waveform measurements. Perform the general procedure and the measurement specific procedure for each sub-measurements.

Required test equipment

Minimum system requirements

Equipment connection diagram

Inputs

■

Differential signal created using two single ended sources (Positive and Negative) and filtered through fourth order 33 GHz Bessel Thomson filter.

Common procedure for transmitter waveform requirements

1. Configure the DUT to transmit the PRBS 7, 9, 11, or 15 signal continuously

at the specified data rate.

2. Acquire the signal at a sampling rate of 200 Gbps and record length of 5M samples.

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3. Oversample the signal to get more than 32 samples per bit and average the signal across the PRBS patterns.

4. Process the signal using steps as per specification section 92.8.3.5 to measure the various Transmitter waveform parameters.

Linear fit pulse peak

This section verifies that the linear fit pulse peak value is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.5.2, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.5.2, Table 93-4

Measurement procedure

1. Set the DUT in PRESET mode by setting the coefficients C(-1), C(0) and

C(1) to zero.

2. Capture the signal and calculate linear fit filter coefficients of the signal. The peak value of the linear fit curve is measured as Linear Fit pulse peak.

Limits

CR4 Linear Fit Pulse Peak > 0.45 * Steady state

voltage

KR4 Linear Fit Pulse Peak > 0.71 * Steady state

voltage

Steady state voltage

This section verifies that the steady state voltage is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.5.2, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.5.2, Table 93-4

Measurement procedure

1. Set the DUT in PRESET mode by setting coefficients C(-1), C(0) and C(1) to

zero.

2. Capture the signal and calculate linear fit pulse of the signal. The average value of the linear fit curve is measured as Steady state output voltage (DC voltage) of the signal.

Limits

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CR4 / KR4 TXE compliance measurements

Minimum pre-cursor full

scale ratio

CR4

KR4

■

Min: 0.34 V

Max: 0.6 V

Min: 0.4 V

Max: 0.6 V

This section verifies that the minimum pre-cursor equalization ratio is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.5.5, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.5.5, Table 93-4

Measurement procedure

1. Set the DUT in PRESET mode and compute the filter coefficients.

2. Calculate equalizer coefficients C(-1), C(0) and C(1). Minimum pre-cursor

equalization ratio is calculated as below:

Minimum post-cursor full

scale ratio

Min Pre-Cursor Eq Ratio = [C(0) – C(-1)] / [C(0) + C(-1)]

Limits

CR4 Minimum pre cursor equalization ratio >= 1.54

KR4 Minimum pre cursor equalization ratio >= 1.54

This section verifies that the minimum pre-cursor equalization ratio is within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.5.5, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.5.5, Table 93-4

Measurement procedure

1. Set the DUT in PRESET mode and compute the filter coefficients.

2. Calculate equalizer coefficients C(-1), C(0) and C(1). Minimum Post cursor

equalization ratio is calculated as below:

Min Post-Cursor Eq Ratio = [C(0) – C(1)] / [C(0) + C(1)]

Limits

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CR4 / KR4 TXE compliance measurements

CR4 Minimum post cursor equalization ratio >= 4

KR4 Minimum post cursor equalization ratio >= 4

Normalized coefficient

step size

This section verifies that the increment and decrement step size of transmitter equalizer coefficients (C(-1), C(0) and C(1)) of the DUT are in conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.5.4, Table 92-6

KR4 TP0a IEEE 802.3bj, Section 93.8.1.5.4, Table 93-4

Measurement procedure

C(-1) Increment step size and C(-1) Decrement step size:

1. Set the DUT in PRESET state; acquire the signal and calculate the filter coefficients.

2. Configure all the DUT’s transmitter equalizer coefficients to INITIALIZE state.

3. Measure the C(-1) coefficient value and denote as C(-1)_Initilaize

4. Configure the DUT’s transmitter equalizer coefficient C(-1) to

INCREMENT, C(0) and C(1) to HOLD state.

5. Measure the C(-1) coefficient value and denote as C(-1)_Increment

6. C(-1) Increment step size is calculated as: Δc = C(-1)_Increment –

C(-1)_Initialize

7. Configure the DUT’s transmitter equalizer coefficient C(-1) to DECREMENT, C(0) and C(1) to HOLD state.

8. Measure the C(-1) coefficient value and denote as C(-1)_Decrement

9. C(-1) Increment step size is calculated as: Δc = C(-1)_Decrement –

C(-1)_Increment

C(0) Increment step size and C(0) Decrement step size:

1. Set the DUT in PRESET state; acquire the signal and calculate the filter coefficients.

2. Configure all the DUT’s transmitter equalizer coefficients to INITIALIZE state.

3. Measure the C(0) coefficient value and denote as C(0)_Initilaize

4. Configure the DUT’s transmitter equalizer coefficient C(0) to INCREMENT,

C(-1) and C(1) to HOLD state.

5. Measure the C(0) coefficient value and denote as C(0)_Increment

6. C(0) Increment step size is calculated as: Δc = C(0)_Increment –

C(0)_Initialize

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CR4 / KR4 TXE compliance measurements

7. Configure the DUT’s transmitter equalizer coefficient C(0) to DECREMENT, C(-1) and C(1) to HOLD state.

8. Measure the C(0) coefficient value and denote as C(0)_Decrement

9. C(0) Increment step size is calculated as: Δc = C(0)_Decrement –

C(0)_Increment

C(1) Increment step size and C(1) Decrement step size:

1. Set the DUT in PRESET state; acquire the signal and calculate the filter coefficients.

2. Configure all the DUT’s transmitter equalizer coefficients to INITIALIZE state.

3. Measure the C(1) coefficient value and denote as C(1)_Initilaize

4. Configure the DUT’s transmitter equalizer coefficient C(1) to INCREMENT,

C(-1) and C(0) to HOLD state.

5. Measure the C(1) coefficient value and denote as C(1)_Increment

Coefficient initialization

ratio

6. C(1) Increment step size is calculated as: Δc = C(1)_Increment – C(1)_Initialize

7. Configure the DUT’s transmitter equalizer coefficient C(1) to DECREMENT, C(-1) and C(0) to HOLD state.

8. Measure the C(1) coefficient value and denote as C(1)_Decrement

9. C(1) Increment step size is calculated as: Δc = C(1)_Decrement –

C(1)_Increment

Limits

CR4

KR4

■

Min: 0.0083

■

Max: 0.05

■

Min: 0.0083

■

Max: 0.05

This section verifies that the equalizer coefficient initialization ratios (Initialization Ratio1 and Initialization Ratio2) of the DUT are within the conformable limits according to the specification.

Standards Test points Specification

CR4 TP2 IEEE 802.3bj, Section 92.8.3.5.3

KR4 TP0a IEEE 802.3bj, Section 93.8.1.5.3

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Measurement procedure

1. Set the DUT in PRESET mode and compute the linear fit pulse.

2. Set the DUT in INITIALIZE mode and compute the linear fit pulse.

3. Compute the equalizer coefficients C(-1), C(0), and C(1) using linear fit

impulse responses of PRESET and INITIALIZE modes.

4. Coefficient Initialization Ratio1 is calculated by the following formula:

Initialization Ratio1 = (c(0)+c(1)–c(–1))/(c(0)+c(1)+c(–1))

5. Coefficient Initialization Ratio2 is calculated by the following formula:

Initialization Ratio2 = (c(0)–c(1)+c(–1))/(c(0)+c(1)+c(–1))

Limits

CR4 and KR4 Coefficient Initialization Ratio1 1.29±10%

Coefficient Initialization Ratio2 2.57±10%

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CR4 / KR4 TXE compliance measurements

76 TekExpress® 100G-TXE Printable Application Help

SCPI commands

About SCPI command

You can use Standard Commands for Programmable Instruments (SCPI) to communicate with the TekExpress application.

Socket configuration for SCPI commands

This section describes the steps for TCPIP socket configuration and TekVISA configuration to execute the SCPI commands.

TCPIP socket configuration

1. Click Start > Control Panel > System and Security > Windows Firewall >

Advanced settings

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SCPI commands

2. In Windows Firewall with Advanced Security menu, select Windows Firewall with Advanced Security on Local Computer > Inbound Rules

and click New Rule…

3. In New Inbound Rule Wizard menu a. Select Port and click Next

78 TekExpress® 100G-TXE Printable Application Help

b. Select TCP as rule apply and enter 5000 for Specific local ports and

click Next

SCPI commands

c. Select Allow the connection and click Next

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SCPI commands

d. Select Domain, Private, Public and click Next

e. Enter Name, Description (optional), and click Finish

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SCPI commands

4. Check whether the Rule name is displayed in Windows Firewall with Advanced Security menu > Inbound Rules

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SCPI commands

TekVISA configuration

1. Click Start > All Programs > TekVISA > OpenChoice Instrument

Manager

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SCPI commands

2. Click Search Criteria. In Search Criteria menu, click LAN to Turn-on. Select Socket from the drop-down list, enter the IP address of the

TekExpress device in Hostname and type Port as 5000. Click configure the IP address with Port.

Enter the Hostname as 127.0.0.1 if the TekVISA and TekExpress application are in the same system, else enter the IP address of the TekExpress application system.

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SCPI commands

3. Click Search to setup the TCPIP connection with the host. Check whether the TCPIP host name is displayed in OpenChoice Instrument Manager >

Instruments

4. Double-click OpenChoice Takler Listener and enter the Command *IDN?

in command entry field and click Query. Check that the Operation is successful and Talker Listener Readout displays the Command / Data.

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SCPI commands

TEKEXP:*IDN?

This command queries the active TekExpress application name running on the oscilloscope.

Outputs

TEKEXP:*OPC?

Syntax

Inputs

Syntax

Inputs

TEKEXP:*IDN?\n

Returns active TekExpress application name running on the oscilloscope.

TIP. Click here for examples.

This command queries the execution status of the last executed command.

TEKEXP:*OPC?\n

Outputs

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0 - last command execution is not complete

1 - last command execution is complete

TIP. Click here for examples.

SCPI commands

TEKEXP:ACQUIRE_MODE

This command sets the acquire mode as live or pre-recorded.

Syntax

Inputs

Outputs

TEKEXP:ACQUIRE_MODE {LIVE | PRE-RECORDED}\n

{LIVE | PRE-RECORDED}

TIP. Click here for examples.

TEKEXP:ACQUIRE_MODE?

This command queries the acquire mode type.

Syntax

Inputs

TEKEXP:ACQUIRE_MODE?\n

Outputs

{LIVE | PRE-RECORDED}

TIP. Click here for examples.

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SCPI commands

TEKEXP:EXPORT

This command returns all the bytes of data to the specified file.

Syntax Outputs

TEKEXP:EXPORT REPORT\n Returns the report file in bytes

TEKEXP:EXPORT WFM,"<FileName>"\n Returns the specified waveform file in bytes

TEKEXP:EXPORT IMAGE,"<FileName>"\n Returns the specified image file in bytes

TEKEXP:INFO?

Inputs

FileName - Specifies the file name

TIP. Click here for examples.

This command queries the information about the file(s).

Syntax Outputs

TEKEXP:INFO? REPORT\n <ReportFileSize>,"<ReportFileName.mht>"

TEKEXP:INFO? WFM\n <WfmFile1Size>,"<WfmFileName1.wfm>";<Wfm

File2Size>,"<WfmFileName2.wfm>";...

TEKEXP:INFO? IMAGE\n <Image1FileSize>,"<Image1FileName>";<Image

2FileSize>,"<Image2FileName>" ;...

TIP. Click here for examples.

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SCPI commands

TEKEXP:INSTRUMENT

This command sets the value for the selected instrument type.

Syntax

Inputs

Outputs

TEKEXP:INSTRUMENT?

TEKEXP:INSTRUMENT "<InstrumentType>",<Value>"\n

InstrumentType

Value

TIP. Check Command parameters list for InstrumentType and Value parameters.

TIP. Click here for examples.

This command queries the instrument selected for the specified instrument type.

Syntax

Inputs

TEKEXP:INSTRUMENT? "<InstrumentType>"\n

InstrumentType

TIP. Check Command parameters list for InstrumentType parameters.

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SCPI commands

Outputs

TEKEXP:LASTERROR?

Syntax

Inputs

Outputs

Returns the instrument selected for the specified instrument type

TIP. Click here for examples.

This command queries the last error string occurred for the current TCP session. If there are no errors since startup, or since the last call to TEKEXP:LASTERROR?\n, this command returns an empty string.

TEKEXP:LASTERROR?\n

TEKEXP:LIST?

TIP. Click here for examples.

This command queries the list of available device, suite, test, version or instrument.

Syntax Outputs

TEKEXP:LIST? DEVICE\n Returns the list of available device(s) as comma

separated values.

TEKEXP:LIST? SUITE\n Returns the list of available suite(s) as comma

separated values.

TEKEXP:LIST? TEST\n Returns the list of available test(s) as comma

separated values.

TEKEXP:LIST? VERSION\n Returns the list of available version(s) as comma

separated values.

TEKEXP:LIST? INSTRUMENT,"<InstrumentType>"\n

Returns the list of available instruments' for the given Instrument type as comma separated values.

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SCPI commands

NOTE. This command returns the list of items within double quotes (""). Iterate the receive procedure until the list ends with double quotes otherwise the next query commands won’t work as expected.

TEKEXP:MODE

Inputs

Syntax

Inputs

Outputs

InstrumentType

TIP. Check Command parameters list for InstrumentType parameters.

TIP. Click here for examples.

This command sets the execution mode as compliance or user defined.

TEKEXP:MODE {COMPLIANCE | USER-DEFINED}\n

{COMPLIANCE | USER-DEFINED}

TIP. Click here for examples.

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Tektronix TekExpress 100G-TXE Compliance Solution Help User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Welcome

Getting help and support

Related documentation

Conventions

Technical support

Getting started

Minimum system requirements

Instruments and accessories required

Installing the software

View software version

Application directories

File name extensions

Operating basics

Launch the application

Application panels overview

Application controls

Global application controls

Options menu overview

Configure email settings

Setup panel

Setup panel overview

Set DUT parameters

Select tests

See also. Set acquisition tab parameters

Status panel

Status panel overview

Results panel

Results panel overview

View test-related files

Plots panel

Plots panel overview

Reports panel

Reports panel overview

Select report options

View a report

Report contents

Running tests

Equipment connection diagram

Prerequisite

Deskew

Running tests

Saving and recalling test setup

Test setup files overview

Save a test setup

Open (load) a saved test setup

Create a test setup using an existing one

Create a test setup from default settings

CAUI4 TXE compliance measurements

DC common mode output voltage

Diff peak-to-peak output voltage - Tx disabled

Diff peak-to-peak output voltage - Tx enabled

AC common mode output voltage

Single ended output voltage

Signaling rate

Eye width and Eye height

Vertical eye closure

Transition time

CR4 / KR4 TXE compliance measurements

DC common mode output voltage

Diff peak-to-peak output voltage - Tx disabled

Diff peak-to-peak output voltage - Tx enabled

AC common mode output voltage

Signaling rate

Output Jitter

Signal to noise and distortion ratio

Transmitter waveform requirements

Common procedure for transmitter waveform requirements

Linear fit pulse peak

Steady state voltage

SCPI commands

About SCPI command

Socket configuration for SCPI commands

TEKEXP:*IDN?

TEKEXP:*OPC?

TEKEXP:ACQUIRE_MODE