Tektronix TekExpress 400G-TXO Optical Compliance Solution for Sampling Scopes User manual

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TekExpress® 400G-TXO Optical Compliance Solution for Sampling Scopes

Printable Application Help

*P077136300*

077-1363-00

TekExpress® 400G-TXO Optical Compliance Solution for Sampling Scopes

Printable Application Help

TekScope v6.5.1.0 or greater

www.tek.com

077-1363-00

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.

■

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

Downloading and installing the software ....................................................................................... 6

View software version and license information ............................................................................. 7

Application directories ................................................................................................................... 7

File name extensions ...................................................................................................................... 8

Operating basics

Launch the application .................................................................................................................... 9

Application panels overview ........................................................................................................ 10

Global application controls ........................................................................................................... 12

Application controls ................................................................................................................ 12

Options menu overview ........................................................................................................... 14

TekExpress instrument control settings .................................................................................. 15

View connected instruments ................................................................................................... 15

Configure email settings .......................................................................................................... 17

Setup panel ................................................................................................................................... 18

Setup panel overview .............................................................................................................. 18

Set DUT parameters ................................................................................................................ 19

Select tests ............................................................................................................................... 20

Set acquisition tab parameters ................................................................................................. 21

Set configuration tab parameters ............................................................................................. 22

Set preferences tab parameters ................................................................................................ 24

Status panel ................................................................................................................................... 25

Status panel overview .............................................................................................................. 25

Results panel ................................................................................................................................. 27

Results panel overview ............................................................................................................ 27

TekExpress® 400G-TXO Printable Application Help i

Table of Contents

View test-related files .............................................................................................................. 27

Reports panel ................................................................................................................................ 28

Reports panel overview ........................................................................................................... 28

Select report options ................................................................................................................ 29

View a report ........................................................................................................................... 31

Report contents ........................................................................................................................ 32

Running tests

Equipment connection diagram .................................................................................................... 33

Oscilloscope compensation .......................................................................................................... 35

External attenuation calibration .................................................................................................... 36

Instrument noise ........................................................................................................................... 38

Running tests ................................................................................................................................ 38

Saving and recalling test setup

Test setup files overview .............................................................................................................. 39

Save a test setup ............................................................................................................................ 39

Open (load) a saved test setup ...................................................................................................... 40

Create a test setup from default settings ....................................................................................... 40

Create a new test setup using an existing one .............................................................................. 40

400G-TXO compliance measurements

Transmitter and dispersion eye closure (TDECQ) ....................................................................... 41

Average launch power .................................................................................................................. 42

Outer optical modulation amplitude ............................................................................................. 44

Signaling rate ................................................................................................................................ 45

Launch power in OMAouter minus TDECQ ............................................................................... 47

Extinction ratio ............................................................................................................................. 48

Average launch power of off-transmitter ..................................................................................... 49

RINxOMA .................................................................................................................................... 50

SCPI commands

About SCPI command .................................................................................................................. 53

Socket configuration for SCPI commands ................................................................................... 53

TEKEXP:*IDN? ........................................................................................................................... 61

TEKEXP:*OPC? .......................................................................................................................... 61

TEKEXP:EXPORT ...................................................................................................................... 62

ii TekExpress® 400G-TXO Printable Application Help

Table of Contents

TEKEXP:INFO? ........................................................................................................................... 62

TEKEXP:INSTRUMENT ............................................................................................................ 63

TEKEXP:INSTRUMENT? .......................................................................................................... 63

TEKEXP:LASTERROR? ............................................................................................................. 64

TEKEXP:LIST? ............................................................................................................................ 64

TEKEXP:MODE .......................................................................................................................... 65

TEKEXP:MODE? ........................................................................................................................ 66

TEKEXP:POPUP ......................................................................................................................... 66

TEKEXP:POPUP? ........................................................................................................................ 67

TEKEXP:REPORT ...................................................................................................................... 67

TEKEXP:REPORT? ..................................................................................................................... 68

TEKEXP:RESULT? ..................................................................................................................... 68

TEKEXP:SELECT ....................................................................................................................... 69

TEKEXP:SELECT? ..................................................................................................................... 70

TEKEXP:SETUP .......................................................................................................................... 70

TEKEXP:STATE ......................................................................................................................... 71

TEKEXP:STATE? ........................................................................................................................ 71

TEKEXP:VALUE ........................................................................................................................ 72

TEKEXP:VALUE? ...................................................................................................................... 72

Command parameters list ............................................................................................................. 73

Examples ..................................................................................................................................... 77

References

Technology overview ................................................................................................................... 79

Tektronix clock recovery unit (CRU) ........................................................................................... 80

Clock / Pre-scalar .......................................................................................................................... 82

Phase reference characterization .................................................................................................. 82

Parameters .................................................................................................................................... 83

About application parameters .................................................................................................. 83

Setup panel configuration parameters ..................................................................................... 83

Reports panel parameters ........................................................................................................ 85

TekExpress® 400G-TXO Printable Application Help iii

Table of Contents

iv TekExpress® 400G-TXO Printable Application Help

Welcome

Welcome to the Tektronix 400G-TXO, a Tektronix sampling oscilloscope application software solution that addresses 50GBASE-FR / 50GBASE-LR / 100GBASE-DR / 200GBASE-DR4 / 200GBASE-FR4 / 200GBASE-LR4 / 400GBASE-FR8 / 400GBASE-LR8 / 400GBASE-DR4 standards of IEEE. These standards are the backbone of the current 400G Ethernet industry, and the TekExpress 400G TXO automation test solution facilitates turnkey optical transmitter validation of 400G Ethernet systems.

The 400G-TXO solution specifically targets sections D1.0 of IEEE802.3cd and D2.2 of IEEE802.3bs specifications. These tools allow verification to these IEEE optical standards, while offering comprehensive test automation, results margining, data logging, and result reporting in an advanced testing framework.

TekExpress® 400G-TXO Printable Application Help v

Welcome

Key features of TekExpress 400G-TXO include:

■

400G-TXO offers transmitter based 50GBASE-FR and 50GBASE-LR optical transmitter characterization testing at TP2, as per IEEE 802.3cd, section D1.0, table 139-6 specification.

■

400G-TXO incorporates 100GBASE-DR optical transmitter standards at TP2, as per IEEE 802.3cd, section D1.0, table 140-6 specification.

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400G-TXO incorporates 200GBASE-DR4 optical transmitter standards at TP2, as per IEEE 802.3bs, section D2.2, table 121-6 specification and 200GBASE-LR4 and 200GBASE-FR4 optical transmitter at TP2, as per IEEE 802.3bs, section D2.2, table 122-9 specification.

■

400G-TXO incorporates 400GBASE-FR8 and 400GBASE-LR8 optical transmitter standards at TP2, as per IEEE 802.3bs, section D2.2, table 122-10 specification and 400GBASE-DR4 optical transmitter standards at TP2, as per IEEE 802.3bs, section D2.2, table 124-6 specification.

vi TekExpress® 400G-TXO Printable Application Help

Getting help and support

Conventions

Help uses the following conventions:

■

The term "Application" and "Software" refers to the TekExpress 400G-TXO Solution application.

■

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

■

The term “select” is a generic term that applies to the different 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.

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

Technical support

General information

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 website. See

Contacting Tektronix for more information.

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

■

All instrument model numbers

■

Hardware options, if any

■

Probes used

■

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

■

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

2 TekExpress® 400G-TXO Printable Application Help

Getting help and support

■

Application specific

information

Software version number

■

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

■

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

■

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

■

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

TekExpress® 400G-TXO Printable Application Help 3

Getting help and support

4 TekExpress® 400G-TXO Printable Application Help

Getting started

Minimum system requirements

The following table shows the minimum system requirements to install and run the TekExpress 400G-TXO solution.

Table 3: System requirements

Component Description

Oscilloscope

■

Tektronix DSA8300 Digital Sampling Oscilloscope

■

Firmware Version: 6.5.1.0 or greater

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80SJNB Software Version: 4.2.6.0 or greater

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Opt ADVTRIG

■

Opt JNB02

■

Opt PAM4

Software

Other Devices

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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

■

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

■

Microsoft compatible mouse or compatible pointing device.

■

Two USB ports (four USB ports recommended).

TekExpress® 400G-TXO Printable Application Help 5

Getting started

Instruments and accessories required

The 400G-TXO application is launched on DSA8300 sampling oscilloscope. The following table lists the instruments and accessories required for this application.

Table 4: Instruments and accessories required for 400G-TXO application

Instrument/Accessory Model number Quantity

Sampling Oscilloscope Tektronix DSA8300 Digital

Serial Analyzer

Clock Recovery Unit CR286A (optional) 1

Optical Modules for 200G-DR4/ FR4/LR4 and 400G-FR8/LR8

Optical Modules for 400G-DR4 80C10C 1

Optical Power Meter supporting DR4, FR4, LR4 wavelength range

Phase Reference 82A04B (optional)

Module extender cables 80X01 (1 meter) 1

80C10C, 80C15, 80C17, 80C18 1

No recommendation 1

Downloading and installing the software

Complete the following steps to download and install the latest 400G-TXO 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 400G-TXO 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.

4. Double-click the executable and follow the on-screen instructions. The software is installed at C:\Program Files\Tektronix\TekExpress\400G-TXO\.

5. Select Application > 400G-TXO from the TekScope menu to launch the

application.

Required to reach jitter noise floors below 100fsec

6 TekExpress® 400G-TXO Printable Application Help

View software version and license information

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 the version information, click Options > TekExpress.

A dialog box similar to the following figure appears.

Getting started

Application directories

The TekExpress 400G-TXO application files are installed at the following location:

C:\Program Files\Tektronix\TekExpress\TekExpress 400G-TXO

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

TekExpress® 400G-TXO Printable Application Help 7

Getting started

Table 5: Application directories and usage

Directory names Usage

Bin Contains TekExpress 400G-TXO application libraries

Compliance Suites Contains compliance-specific files

Examples Contains various support files

ICP Contains instrument and TekExpress 400G-TXO application-

specific interface libraries

Images Contains images of the TekExpress 400G-TXO application

Lib Contains utility files specific to the TekExpress 400G-TXO

application

Report Generator Contains style sheets for report generation

Tools Contains instrument and TekExpress 400G-TXO application-

specific files

See also:

File name extensions

View test-related files

File name extensions

The TekExpress 400G-TXO 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

8 TekExpress® 400G-TXO Printable Application Help

Operating basics

Launch the application

To launch the TekExpress 400G-TXO solution, select Application > 400G-TXO from the TekScope menu.

When you launch the application for the first time, the file C:\Users\<username> \Documents\My TekExpress\400G-TXO\Resources.xml is mapped to drive X:. This file contains information about available network-connected instruments. The session files are stored in X:\400G-TXO\. If this file is not found, then the application runs Instrument Discovery Program to detect the network-connected instruments before launching 400G-TXO solution.

If the application is behind the oscilloscope application, click Application > 400G-TXO to bring it to the front. To keep the 400G-TXO application window on top, select Keep On Top from the 400G-TXO Options menu.

TekExpress® 400G-TXO Printable Application Help 9

Operating basics

See also:

Application controls

Application panel overview

Application panels overview

TekExpress 400G-TXO 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.

10 TekExpress® 400G-TXO Printable Application Help

Operating basics

Table 6: Application panels overview

Panel Name Purpose

Setup panel To select the test setup controls which are grouped in tabs. The controls

in a tab can change depending on settings made in the same tab or another tab. Click the Setup button to open this panel. Use this panel to:

■

Set the DUT parameters

■

Select the tests

■

Set the acquisition parameters

■

Set the configuration parameters

■

Set the preferences parameters

Status panel This panel displays the acquisition status and analysis status for the

selected tests in Test Status and logs in Log View.

Results panel This tab displays 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, replace current test results in the report with the test result(s) of previous run in current session, select report content to include (summary information, detailed information, user comments, setup configuration, application configuration), and select report viewing options.

See also:

Application controls

TekExpress® 400G-TXO Printable Application Help 11

Operating basics

Global application controls

Application controls

Table 7: Application controls descriptions

Item Description

Options menu overview on

page 14Options menu

Application controls on

page 12Panel buttons

Start/Stop button

Menu to display global application controls

Controls that open panels for configuring test settings and options.

Click the Start button to run the measurements in the selected order. If prior acquired measurements have not been cleared, the 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.

12 TekExpress® 400G-TXO Printable Application Help

Operating basics

Item Description

Pause \ Continue button

Clear button

Minimize button

Use the Pause button to temporarily interrupt the current acquisition. When a test is paused, the button name changes to “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 the Results panel.

Minimizes the application.

Close button

Application window move Place the cursor over the application window and drag it to the

Mini view / Normal view

Exits the application.

desired location.

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.

TekExpress® 400G-TXO Printable Application Help 13

Operating basics

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: Compliance Standard: DR Speed: 200G Test Point: TP2 Specification: IEEE802.3bs, D2.2, Table 121-6 Data rate: 26.5625 GBd Wavelength: None Pattern Length: 511

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 400G-TXO application on top of all the application

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

Help Displays the TekExpress 400G-TXO help

About TekExpress

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

■

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

■

Provides a link to the end-user license agreement

■

Provides a link to the Tektronix Web site

Configure email settings

To be notified by email when a test completes, fails, or produces an error, configure the email settings.

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

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

addresses to which to send the test notification. 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 used. For example: DPO72016C_B130099@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.

Enter a valid login name and password in the corresponding fields. Select Enable SSL, if the server requires SSL/TLS technology.

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.

■

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:

■

Select the message file format to send: HTML (the default) or plain text.

■

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.

■

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® 400G-TXO Printable Application Help 17

Operating basics

Setup panel

Email settings

Setup panel overview

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

18 TekExpress® 400G-TXO 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.

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 Type Live waveforms.

Mode

Standard

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

The application performs analysis on live waveforms only.

■

Compliance

■

User Defined

■

TekExpress® 400G-TXO Printable Application Help 19

Operating basics

Setting Description

Speed Select the speed from the drop-down list. The options available

depends on the Standard selected.

■

50G

■

100G

■

200G

■

400G

Test Point TP2.

Specification Displays the specification for the selected Standard and Speed.

Device Profile

Optical Module Settings

Data Rate Set the data rate to be tested.

Wavelength Select the wavelength from the drop-down list. The drop-down

lists the wavelength supported by the connected optical module.

Pattern Length Configure the repetitive pattern length to validate.

Select tests

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 tab) 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 the tests are running.

Test status view

TekExpress® 400G-TXO Printable Application Help 25

Operating basics

Log view

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

Operating basics

Results panel overview

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

View test-related files

Reports panel

Reports panel overview

Select report options

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

View a report

View report after generating Automatically opens the report in default Web

browser, when the test execution is complete. 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.

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® 400G-TXO Printable Application Help 31

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, electrical module model, 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).

NOTE.

■

Use CR286A (supports up to 28 GBd) output or clock output from the DUT as the clock input signal.

■

The optical splitter is internal to 80C10C CRTP.

Figure 1: Connection diagram with Tek CR286A

TekExpress® 400G-TXO Printable Application Help 33

Running tests

See also:

Figure 2: Connection diagram with clock synchronized to DUT signal

Minimum system requirement

34 TekExpress® 400G-TXO Printable Application Help

Running tests

Oscilloscope compensation

Use the following procedure to check the oscilloscope calibration status:

1. Select TekExpress 400G-TXO > Setup > Acquisition panel > Calibration to open the calibration dialog box.

2. Click Refresh (in the Oscilloscope Calibration area).

NOTE. It is recommended to perform Oscilloscope Compensation in addition after 20 minutes of warm up. Oscilloscope compensation can be accessed from the Oscilloscope main menu, Utilities > Instrument Compensation. Click Help in the compensation window for further details.

TekExpress® 400G-TXO Printable Application Help 35

Running tests

External attenuation calibration

Complete the following the steps to set the external attenuation:

1. In DSA8300, set the optical source as Ch1.

2. Enter the External Attenuation value for the oscilloscope as shown in the

following image.

3. Select Ch1 from the TekExpress 400G-TXO > Setup > DUT > Source.

36 TekExpress® 400G-TXO Printable Application Help

Running tests

4. Click TekExpress 400G-TXO > Setup > Acquisition > Calibration to open the calibration dialog box.

5. Click Refresh (in the External Attenuation area) and check the value.

6. Repeat steps 1 to 5 by selecting Ch3 and check the value.

TekExpress® 400G-TXO Printable Application Help 37

Running tests

Instrument noise

The following procedure is used by the 400G-TXO application to measure the Instrument noise calibration:

1. Disconnect all signals connected to the sampling oscilloscope.

2. Select Setup > Vert > waveform C1 to On.

3. Define MATH1 as Ch1, and switch on MATH1.

4. Set the Trigger Source to Free Run.

5. Select measurement Setup > Meas > Meas 1 > Pulse Amplitude: AC RMS.

6. Set Setup > Meas > Source: MATH1.

7. Set WaveformdB source as MATH1.

8. Enable and switch on the display of WaveformdB.

9. Query the result of measurement1 (AC RMS).

NOTE. Measured noise limit is a function of optical settings (Bandwidth and Filter).

Running tests

Prerun checklist

If the noise level measurement is not within the limits, perform an oscilloscope compensation and then perform the instrument noise measurement again. If the measured noise level is still outside of the above limits, please contact Tektronix

customer support.

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 400G-TXO application on top, select Keep On Top from the TekExpress Options menu.

The application displays the report when the tests execution is complete.

1. Make sure that the instruments have had a 20-minute warm-up .

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

steps to perform instrument compensation.

38 TekExpress® 400G-TXO 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:\400G-TXO.

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.

Save a test setup

Save a test setup before or after running a test to save the test configuration. Create a new test setup from any open setup or from the default setup. When you select the default test setup, all parameters are returned to the default values of the application.

To save the current setup session to the same setup name, select Options > Save Test Setup.

To save the current setup session to a new setup name, select Options > Save Test Setup As.

TekExpress® 400G-TXO Printable Application Help 39

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. The setup files are located at X:\400G-TXO\.

Create a test setup from default settings

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

1. Select Options > Default Test Setup. For default test setup, the parameters are set to the default values.

2. Click Setup and set the test setup controls.

3. Click Reports and select the test result information to be included in the

report and naming conventions to use for the report.

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:\400G-TXO\<session_name>.

Create a new test setup using an existing one

Use this method to create a variation on a test setup without having to create the setup from the beginning.

1. Select Options > Open Test Setup.

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

3. Use the Setup and Reports panels to modify the parameters to meet your

testing requirements.

4. Select Options > Save Test Setup As.

5. Enter a test setup name and click Save.

40 TekExpress® 400G-TXO Printable Application Help

400G-TXO compliance measurements

Transmitter and dispersion eye closure (TDECQ)

This measurement verifies that the transmitter and dispersion eye closure of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

■

PAM4 equalized (FFE) optical signal

■

Histogram width in percentage

■

Pattern length as input to the DUT panel

Patterns supported

■

Any repeating pattern

Measurement procedure

Transmitter and Dispersion Eye Closure for PAM4 (TDECQ) is a penalty given by the ratio of the noise a receiver could add to an ideal transmitter and ideal channel and get a certain symbol error rate (SER) to the noise a receiver could add to the DUT and worst case channel and get the same SER. These noise terms are given by R1 and R2 respectively. The SER used in IEEE standard for TDECQ is 4.8e-4. TDECQ is calculated by the following formula:

R1 = R2 is the best case. If, R2 < R1, and TDECQ is > 0 dB. This measurement is done using 80SJNB with coding as “PAM4”.

TekExpress® 400G-TXO Printable Application Help 41

400G-TXO compliance measurements

The equalized signal is used as input for the TDECQ measurement. Feed Forward Equalizer with Number of FFE taps as 5 and FFE taps per symbol as 2 is used to equalize the PAM4 signal.

You can configure the histogram width in percentage from 2 to 10. While executing the TDECQ measurement, the TekExpress application configures the 80SJNB in free-run mode with the total number of samples specified by the Population Limit.

Limits

Standards Lower limit Higher limit

50GBASE-FR NA 2.3 dB

50GBASE-LR NA 2.5 dB

100GBASE-DR NA 2.5 dB

200GBASE-DR4 NA 2.5 dB

200GBASE-FR4 NA 2.4 dB

200GBASE-LR4 NA 2.5 dB

400GBASE-FR8 NA 2.2 dB

400GBASE-LR8 NA 2.4 dB

400GBASE-DR4 NA 2.5 dB

Average launch power

This measurement verifies that the average launch power of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

■

PAM4 equalized (FFE) optical signal

■

Pattern length as input to the DUT panel

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400G-TXO compliance measurements

Patterns supported

■

Any repeating pattern

Measurement procedure

Average launch power is the power that the optical signal is launched at the transmitter end. It is the function of the brightness of the optical source. Average launch power is expressed in dBm with 1 mW acting as the reference level.

This measurement is done using 80SJNB with coding as “PAM4”. The equalized signal is used as the input for the TDECQ measurement. The Feed Forward Equalizer with the Number of FFE taps set to 5 and FFE taps-per-symbol set to 2 is used to equalize the PAM4 signal.

Limits

Standards Lower limit Higher limit

50GBASE-FR NA NA

50GBASE-LR NA NA

100GBASE-DR -2.4 dBm 4 dBm

200GBASE-DR4 -4.6 dBm 3 dBm

200GBASE-FR4 -3.7 dBm 4.7 dBm

200GBASE-LR4 -2.9 dBm 5.3 dBm

400GBASE-FR8 -3 dBm 5.3 dBm

400GBASE-LR8 -2.3 dBm 5.3 dBm

400GBASE-DR4 -2.4 dBm 4 dBm

TekExpress® 400G-TXO Printable Application Help 43

400G-TXO compliance measurements

Outer optical modulation amplitude

This measurement verifies that the outer optical modulation amplitude of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

■

PAM4 equalized (FFE) optical signal

■

Pattern length as input to the DUT panel

Patterns supported

■

Any repeating pattern

Measurement procedure

The outer optical modulation amplitude is the difference between the average optical launch power level P3, measured over the central 2 UI of the run of 7 threes and the average optical launch power level P0 measured over the central 2 UI of the run of 6 zeros.

This measurement is done using 80SJNB with coding as “PAM4”. Equalized signal is used as input for the TDECQ measurement. The Feed Forward Equalizer with the Number of FFE taps set to 5 and FFE taps-per-symbol set to 2 is used to equalize the PAM4 signal.

Limits

Standards Lower limit Higher limit

50GBASE-FR -2.0 dBm 2.8 dBm

50GBASE-LR -1.0 dBm 4.0 dBm

100GBASE-DR -0.3 dBm 4.2 dBm

200GBASE-DR4 -2.5 dBm 2.8 dBm

200GBASE-FR4 -0.7 dBm 4.5 dBm

200GBASE-LR4 0.1 dBm 5.1 dBm

400GBASE-FR8 0 dBm 5.5 dBm

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400G-TXO compliance measurements

Standards Lower limit Higher limit

400GBASE-LR8 0.7 dBm 5.7 dBm

400GBASE-DR4 -0.3 dBm 4.2 dBm

Signaling rate

This measurement verifies that the signaling speed of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

■

PAM4 equalized (FFE) optical signal

■

Pattern length as input to the DUT panel

Patterns supported

■

Any repeating pattern

Measurement procedure

As per the specification, the DUT will transmit the PAM4 signal with the symbol rate of ±100 ppm from the nominal symbol rate.

The Nominal symbol rate for standards is given in the following table.

Standard Nominal symbol rate (GBd)

100GBASE-DR 53.125

50GBASE-FR and 50GBASE-LR 26.5625

200GBASE-DR4, 200GBASE-LR4 200GBASEFR4, 400GBASE-FR8 and 400GBASE-LR8

400GBASE-DR4 53.125

26.5625

There are two cases to be considered while executing this measurement.

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400G-TXO compliance measurements

Case1: With a Tektronix external clock recovery unit

■

Connect the data signal to the external Tektronix clock recovery unit; configure and lock the clock recovery unit.

■

Launch the 400G-TXO application and connect the external clock recovery unit to the sampling oscilloscope through the USB interface.

■

The data rate of the locked clock recovery unit is used as the result for this measurement.

This measurement will report an error, If clock recovery unit is not locked.

Case1: Without Tektronix external Clock Recovery Unit

If an external Tektronix Clock Recovery Unit is not available, then the value configured by the user in the DUT panel is used as result for this measurement.

Limits

■

Low Limit : Nominal Data rate – 100 ppm

■

High Limit : Nominal Data rate + 100 ppm

Standards Nominal data rate

50GBASE-FR 26.5625

50GBASE-LR 26.5625

100GBASE-DR 53.125

200GBASE-DR4 26.5625

200GBASE-FR4 26.5625

200GBASE-LR4 26.5625

400GBASE-FR8 26.5625

400GBASE-LR8 26.5625

400GBASE-DR4 53.125

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400G-TXO compliance measurements

Launch power in OMAouter minus TDECQ

This measurement verifies that the launch power in OMAouter minus TDECQ of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

■

PAM4 equalized (FFE) optical signal

■

Pattern length as input to the DUT panel

Patterns supported

■

Any repeating pattern

Measurement procedure

This measurement is a function of two 80SJNB measurements. Launch power in OMAouter minus TDECQ = OMAouter in dBm – TDECQ in dB.

This measurement is done using 80SJNB with coding as “PAM4”. The Equalized signal is used as input for the TDECQ measurement. The Feed Forward Equalizer with the Number of FFE taps set to 5 and FFE taps-per-symbol set to 2 is used to equalize the PAM4 signal.

Limits

Standards Lower limit Higher limit

50GBASE-FR -2 dBm NA

50GBASE-LR -2 dBm NA

100GBASE-DR -1.3 dBm NA

200GBASE-DR4 -3.5 dBm NA

200GBASE-FR4 -1.7 dBm NA

200GBASE-LR4 -0.9 dBm NA

400GBASE-FR8 -1 dBm NA

400GBASE-LR8 -0.3 dBm NA

400GBASE-DR4 -1.3 dBm NA

TekExpress® 400G-TXO Printable Application Help 47

400G-TXO compliance measurements

Extinction ratio

This measurement verifies that the extinction ratio of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

■

PAM4 equalized (FFE) optical signal

■

Pattern length as input to the DUT panel

Patterns supported

■

Any repeating pattern

Measurement procedure

The Extinction Ratio (ER) of a PAM4 optical signal is the ratio of average optical launch power level P3 measured over the central 2 UI of the run of 7 threes and the average optical launch power level P0 measured over the central 2 UI of the run of 6 zeros.

The Extinction Ratio measurement accuracy will be increased if dark level compensation is done as pre-requisite.

This measurement is done using 80SJNB with coding as “PAM4”. The equalized signal is used as input for the TDECQ measurement. The Feed Forward Equalizer with the Number of FFE taps set to 5 and FFE taps-per-symbol set to 2 is used to equalize the PAM4 signal.

Limits

Standards Lower limit Higher limit

50GBASE-FR 4.5 dB NA

50GBASE-LR 4.5 dB NA

100GBASE-DR 5 dB NA

200GBASE-DR4 4.5 dB NA

200GBASE-FR4 4.5 dB NA

48 TekExpress® 400G-TXO Printable Application Help

400G-TXO compliance measurements

Standards Lower limit Higher limit

200GBASE-LR4 4.5 dB NA

400GBASE-FR8 4.5 dB NA

400GBASE-LR8 4.5 dB NA

400GBASE-DR4 5 dB NA

Average launch power of off-transmitter

This measurement verifies that the average launch power of off-transmitter of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

Patterns supported

Measurement procedure

The average Launch Power with optical transmitter off can be measured only using an external optical power meter. Measure the result from power meter, convert the result to the dBm scale, and dial in the result in the pop-up displayed by the application. This result is used to compare with the limits and report pass/ fail of the test.

Limits

Standards Lower limit Higher limit

50GBASE-FR NA -30 dBm

50GBASE-LR NA -30 dBm

100GBASE-DR NA -20 dBm

200GBASE-DR4 NA -30 dBm

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400G-TXO compliance measurements

Standards Lower limit Higher limit

200GBASE-FR4 NA -30 dBm

200GBASE-LR4 NA -30 dBm

400GBASE-FR8 NA -30 dBm

400GBASE-LR8 NA -30 dBm

400GBASE-DR4 NA -30 dBm

RINxOMA

This measurement verifies that the extinction ratio of the DUT is within the conformable limits according to the specification.

Required test equipment

Minimum system requirements

Equipment connection diagram

Standards Specification

50GBASE-FR and 50GBASE-LR IEEE 802.3cd, Table 139-6

100GBASE-DR IEEE 802.3cd, Table 140-6

200GBASE-DR4 IEEE 802.3bs, Table 121-6

200GBASE-FR4 and 200GBASE-LR4 IEEE 802.3bs, Table 121-9

400GBASE-FR8 and 400GBASE-LR8 IEEE 802.3bs, Table 122-10

400GBASE-DR4 IEEE 802.3bs, Table 124-6

Inputs

■

PAM4 equalized (FFE) optical signal

■

Pattern length as input to the DUT panel

Patterns supported

■

Any repeating pattern

Measurement procedure

RINxOMA represents Relative Intensity Noise (RIN) of an optical signal measured using a setup with x dB of optical return loss. Mathematically, RINxOMA is defined as:

Where:

50 TekExpress® 400G-TXO Printable Application Help

400G-TXO compliance measurements

RINxOMA = Relative intensity noise referred to optical modulation amplitude measured with x dB reflection

BW = Low pass bandwidth of filter – high pass bandwidth of DC blocking capacitor (noise bandwidth of the measuring system in Hz)

PN = Electrical noise power in watts with modulation turned off

PM = Electrical power in watts with modulation turned on

The PAM4 optical signal will have three eyes. RINxOMA will be computed for each eye and the worst RINxOMA is displayed as the measurement result. The worst RINxOMA is compared with the limits and either pass or fail is reported for the test.

The RINxOMA of the other two eyes are reported in specific comments for each measurement run.

The RINxOMA computation for three eyes of PAM4 signal depends on:

■

OMA, OMA1, and OMA2 reported by JNB. OMA, OMA1, and OMA2 are optical modulation amplitudes for PAM eyes 0, 1, and 2 respectively.

■

NoiseRMSHigh, NoiseRMSHigh1, and NoiseRMSHigh2 reported by JNB NoiseRMSHigh, NoiseRMSHigh1, and NoiseRMSHigh2 are random noise measurements on level high for PAM4 lower eye, middle eye, and upper eye respectively.

■

NoiseRMSLow, NoiseRMSLow1, and NoiseRMSLow2 reported by JNB NoiseRMSLow, NoiseRMSLow1, and NoiseRMSLow2 are random noise measurements on level low for PAM4 lower eye, middle eye, and upper eye respectively.

Mathematically, RINxOMA for each eye is computed using the formula given below.

Where:

RandomNoiseHighLevel = random noise measurement result on level high

RandomNoiseLowLevel = random noise measurement result on level low

ScopeNoise = scope noise computed as part of calibration

BW = optical bandwidth

OMA = Optical modulation amplitude

Limits

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400G-TXO compliance measurements

Standards Optical return loss

(dB)

50GBASE-FR 16.5 NA -136 dB/Hz

50GBASE-LR 15.1 NA -136 dB/Hz

100GBASE-DR 21.4 NA -142 dB/Hz

200GBASE-DR4 22.8 NA -142 dB/Hz

200GBASE-FR4 17.8 NA -136 dB/Hz

200GBASE-LR4 15.7 NA -136 dB/Hz

400GBASE-FR8 17.8 NA -136 dB/Hz

400GBASE-LR8 15.7 NA -136 dB/Hz

400GBASE-DR4 22.8 NA -142 dB/Hz

Lower limit Higher limit

52 TekExpress® 400G-TXO 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

TekExpress® 400G-TXO Printable Application Help 53

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

54 TekExpress® 400G-TXO 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

TekExpress® 400G-TXO Printable Application Help 55

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

TekExpress® 400G-TXO Printable Application Help 57

SCPI commands

TekVISA configuration

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

Manager

58 TekExpress® 400G-TXO Printable Application Help

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.

TekExpress® 400G-TXO Printable Application Help 59

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 scope.

Outputs

TEKEXP:*OPC?

Syntax

Inputs

Syntax

Inputs

TEKEXP:*IDN?\n

Returns active TekExpress application name running on the scope

TIP. Click here for examples.

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

TEKEXP:*OPC?\n

Outputs

TekExpress® 400G-TXO Printable Application Help 61

0 - last command execution is not complete

1 - last command execution is complete

TIP. Click here for examples.

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 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? 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.

TekExpress® 400G-TXO Printable Application Help 63

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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SCPI commands

TEKEXP:MODE?

This command queries the execution mode type.

Syntax

Outputs

TEKEXP:POPUP

Syntax

Inputs

TEKEXP:MODE?\n

{COMPLIANCE | USER-DEFINED}

TIP. Click here for examples.

This command sets the response to the active popup shown in the application.

TEKEXP:POPUP “<PopupResponse>”\n

PopupResponse

Outputs

TIP. Click here for examples.

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SCPI commands

TEKEXP:POPUP?

This command queries the active popup information shown in the application.

Syntax

Inputs

Outputs

TEKEXP:REPORT

Syntax

Inputs

TEKEXP:POPUP?\n

Returns the active popup information in the application.

TIP. Click here for examples.

This command generates the report for the current session.

TEKEXP:REPORT GENERATE\n

GENERATE

Outputs

TIP. Click here for examples.

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SCPI commands

TEKEXP:REPORT?

This command queries the queried header field value in the report.

Syntax

Inputs

Outputs

TEKEXP:RESULT?

TEKEXP:REPORT? “<HeaderField>”\n

HeaderField - Specifies to return the measured value for the indicated test.

TIP. Check Report for HeaderField parameters.

Returns the queried header field value in the report

TIP. Click here for examples.

This command queries the result available in report summary/details table.

Syntax Outputs

TEKEXP:RESULT? "<TestName>"\n Return Pass/Fail status of the test.

TEKEXP:RESULT? "<TestName>","<ColumnName>"\n

TEKEXP:RESULT? "<TestName>","<ColumnName>",<RowNumber >\n

Returns all the row values of the specified column for the test.

Returns the column value for the specified row number

Row number starts from zero.

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SCPI commands

Inputs

TEKEXP:SELECT

Syntax

TestName - Specifies the name of the test for which to obtain the test result value.

ColumnName - Specifies the column name for the measurement

RowNumber - Specifies the row number of the measurement

TIP. Check Results panel for TestName, ColumnName, and RowNumber parameters.

TIP. Click here for examples.

This command selects the device, suite, version, or test.

TEKEXP:SELECT <string1>,<string2>,<string4>\n

TEKEXP:SELECT TEST,<string3>,<string4>\n

Inputs

<string1> = {DEVICE | SUITE | VERSION}

<string2> = {DeviceName | SuiteName | VersionName}

<string3> = {“<TestName>"| ALL| REQUIRED }

<string4> = {TRUE | FALSE}

TIP. Check Command parameters list for DeviceName, SuiteName, VersionName, and TestName parameters.

TIP. Click here for examples.

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SCPI commands

Outputs

TEKEXP:SELECT?

Syntax

Inputs

Outputs

This command queries the name of the selected device, suite, version, or test.

TEKEXP:SELECT? {DEVICE | SUITE | TEST | VERSION}\n

{DEVICE | SUITE | TEST | VERSION}

Returns the name of the selected device, suite, version, or test.

TIP. Click here for examples.

TEKEXP:SETUP

Inputs

This command sets the value of the current setup.

Syntax Outputs

TEKEXP:SETUP DEFAULT\n Restore to default Setup

TEKEXP:SETUP OPEN,"<SessionName>"\n Open the session

TEKEXP:SETUP SAVE\n Save the session

TEKEXP:SETUP SAVE,"<SessionName>"\n Save the session

SessionName - The name of the session

TIP. Click here for examples.

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SCPI commands

TEKEXP:STATE

This command sets the execution state of the application.

Syntax

Inputs

Outputs

TEKEXP:STATE?

TEKEXP:STATE {RUN | STOP | PAUSE | RESUME}\n

{RUN | STOP | PAUSE | RESUME}

TIP. Click here for examples.

This command queries the current setup state.

Syntax Outputs

TEKEXP:STATE? RUNNING | PAUSED | WAIT | ERROR | READY

| STOPPED

TEKEXP:STATE? SETUP SAVED | NOT_SAVED

TIP. Click here for examples.

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SCPI commands

TEKEXP:VALUE

This command sets the value of parameters of type General or DUTID.

Syntax

Inputs

Outputs

TEKEXP:VALUE?

TEKEXP:VALUE GENERAL,"<ParameterName>",“<Value>”\n

TEKEXP:VALUE DUTID,“<Value>”\n

ParameterName - Specifies the parameter name

Value - Specifes the value to set

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

TIP. Click here for examples.

This command queries the value of the parameter for type General or DUTID.

Inputs

Syntax Outputs

TEKEXP:VALUE? GENERAL,"<ParameterName>"\n

TEKEXP:VALUE? DUTID\n Returns the DUTID value

ParameterName - Specifies the parameter name

TIP. Check Command parameters list for ParameterName parameters.

Returns the value of Parameter for type GENERAL

72 TekExpress® 400G-TXO Printable Application Help

SCPI commands

Outputs

Returns the value of Parameter for type GENERAL | DUTID.

TIP. Click here for examples.

Command parameters list

This section provides the parameters list for the SCPI commands.

TekExpress 400G-TXO

Parameters Description

command parameters

InstrumentType Specifies the instrument type.

Valid values are:

■

Sampling Scope

Value Specifies the value parameters.

■

For InstrumentType, valid values are:

■

Do not use

■

GPIB8::1::INSTR

■

For DUTID, valid value is:

■

Comment

DeviceName Specifies the device name. Valid values are:

■

SuiteName Specifies the suite name.

Valid values are 50G, 100G, 200G, 400G

TestName

■

Transmitter and Dispersion Eye Closure

■

Average Launch Power

■

Outer Optical Modulation Amplitude

■

Signaling Rate

■

Launch Power in OMAouter minus TDECQ

■

Extinction Ratio

■

Average Launch Power of Off Transmitter

■

RINxOMA

ParameterName and Value for General

Specifies the ParameterName and Value for General, Acquire and Analyze. The configuration parameters available are not same for measurements.

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SCPI commands

Table 15: ParameterName and Value for General

ParameterName Value

Report Update Mode

Replace Runsession Path Session file path.

Include Header In Appended Reports

■

New

■

Append

■

Replace

■

ReplaceAny

Example: X:\400G-TXO\Session1\DUT001\20170421_121534

■

"True"

■

"False"

Auto increment report name if duplicate

Include Pass/Fail Results Summary

Include Detailed Results

Include Plot Images

Include Setup Configuration

Report margin value in percentage

Include User Comments

■

"True"

"False"

"True"

"False"

"True"

"False"

"True"

"False"

"True"

"False"

"True"

"False"

"True"

"False"

Save As Type

View Report After Generating

■

Web Archive (*.mht;*.mhtml)

■

PDF (*.pdf;)

■

CSV (*.csv;)

■

"True"

■

"False"

74 TekExpress® 400G-TXO Printable Application Help

SCPI commands

ParameterName Value

Report Group Mode

■

Test Name

Test Result

Create report at the end

■

"True"

"False"

DUTID Comment User comment

Run Test More than Once TRUE or FALSE

Number of Runs 1 to 100

Timer Warning Info Message Popup

Timer Warning Info Message

■

"True"

■

"False"

1 to 100

Popup Duration

Timer Error Message Popup

■

"True"

■

"False"

1 to 100

Duration

Pattern Length 2 to 100000

Data Rate Valid values are:

■

25 to 28.5 for 200G DR and all speeds of FR/LR

■

50 to 56 for 100G and 400G DR

Wavelength Wavelength supported by the connected optical module.

For example:

■

1310 : FACTORY

■

1550 : FACTORY

MODE

Signal Conditioning Mode

■

COMPLIANCE

■

USER-DEFINED

■

BandWidth

■

Filter

Filter Filter supported by the connected optical module.

For example:

■

40GBASE-LR

■

OTU-4

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SCPI commands

ParameterName Value

BandWidth Bandwidth supported by the connected optical module.

For example:

■

"70.000GHz"

■

"55.000GHz"

Histogram Width 2 to 10

Population Limit 431100 to 10000000

PhaseRefCheck

■

"True"

"False"

Trigger Source

■

Tek CRU

Others

Data to Clock ratio 1, 2, 4, 8

Auto FFE

Recall 80SJNB Data

■

"True"

"False"

"True"

"False"

80SJNB Data File File path.

Example: C:\DataFile\PRBS15.mat

Optical Source CH1, CH2, CH3, CH4

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SCPI commands

Examples

This section provides the examples for the SCPI commands.

Example Description

TEKEXP:*IDN?\n It returns the active TekExpress application name running on the

scope.

TEKEXP:*OPC?\n It returns the last command execution status.

TEKEXP:EXPORT REPORT\n It returns the report file in bytes. This can be written into another file

for further analysis.

TEKEXP:INFO? REPORT\n It returns “100,”ReportFileName.mht”", when 100 is the filesize in

bytes for the filename ReportFileName.

TEKEXP:INSTRUMENT? “Sampling Scope”\n It returns "DSA8300 ( GPIB8::1::INSTR ), when DSA8300

( GPIB8::1::INSTR )" is the connected.

TEKEXP:LASTERROR?\n It returns ERROR: INSTRUMENT_NOT_FOUND, when no

instrument is found.

TEKEXP:LIST? DEVICE\n It returns "DR,FR,LR" when DR, FR, and LR are the available

device.

TEKEXP:LIST? INSTRUMENT,"Sampling Scope"\n It returns "DSA8300 ( GPIB8::1::INSTR )" when DSA8300 is the

available instruments.

TEKEXP:MODE COMPLIANCE\n It sets the execution mode as compliance.

TEKEXP:MODE?\n It returns COMPLIANCE when the execution mode is compliance.

TEKEXP:POPUP “OK”\n It sets OK as the response to active popup in the application.

TEKEXP:POPUP?\n It returns "OK", when OK is the active popup information shown in

the application.

TEKEXP:REPORT GENERATE\n It generates report for the current session.

TEKEXP:REPORT? “Scope Information”\n It returns "DSA8300" when DSA8300 is the scope model.

TEKEXP:REPORT? “DUT ID”\n It returns "DUT001" when DNI_DUT001 is the DUT ID.

TEKEXP:SELECT DEVICE, DR, TRUE\n It selects DR

TEKEXP:SELECT? DEVICE\n It returns "TX-Device" when TX-Device is the selected device type.

TEKEXP:SETUP DEFAULT\n It restores the application to default setup.

TEKEXP:STATE STOP\n It stops the test execution.

TEKEXP:STATE?\n It returns as READY when the application is ready to run next

measurement.

TEKEXP:STATE? SETUP\n It returns as NOT_SAVED when the current setup is not saved.

TEKEXP:VALUE GENERAL,"Pattern Length", "511"\n It sets the pattern length to 511.

TEKEXP:VALUE? GENERAL,"Pattern Length"\n It returns "511", when 511 is the pattern length.

TEKEXP:VALUE GENERAL,"Report Update Mode","Replace" It sets to replace current test results in the report with the test

result(s) of previous run in current session.

TEKEXP:VALUE GENERAL,"Report Update Mode","ReplaceAny" It sets to replace current test results in the report with the test

result(s) from the selected session.

TEKEXP:VALUE GENERAL,"Replace Runsession Path","X:\400GTXO\Session1\DUT001\20170421_121534"

It sets the session from which to replace the result(s).

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SCPI commands

78 TekExpress® 400G-TXO Printable Application Help

References

Technology overview

The 400G-TXO application provides measurements for characterization of 50G, 100G, 200G, and 400G PAM4 (pulse amplitude modulation) optical signal at TP2. All measurements will be done on a sampling oscilloscope using either base oscilloscope, 80SJNB, or measurements.

Table 16: 400G-TXO optical standards

Standards Data rate /

Symbol rate (GBd)

50GBASE-FR 26.5625 53.125 1 2 m to 2 km 19.34 GHz

50GBASE-LR 26.5625 53.125 1 2 m to 10 km 19.34 GHz

100GBASE-DR 53.125 106.25 1 2 m to 500 m 38.68 GHz

200GBASE-FR4 26.5625 53.125 4 2 m to 2 km 19.34 GHz

200GBASE-LR4 26.5625 53.125 4 2 m to 10 km 19.34 GHz

200GBASE-DR4 26.5625 53.125 4 2 m to 500 m 19.34 GHz

400GBASE-FR4 26.5625 53.125 8 2 m to 2 km 19.34 GHz

400GBASE-LR4 26.5625 53.125 8 2 m to 10 km 19.34 GHz

400GBASE-DR4 53.125 106.25 4 2 m to 500 m 38.68 GHz

Bit rate (Gbps)

Number of lanes

Operating range

Optical reference receiver filter

Table 17: 400G-TXO measurements and the standards they support

Measurements 50GBA

SE-FR

Signaling Rate ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

Average launch power

Outer Optical Modulation Amplitude

Launch power in OMA outer minus TDECQ

Transmitter and dispersion eye closure for PAM4

NA NA ✓ ✓ ✓ ✓ ✓ ✓ ✓

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

50GBA SE-LR

100GB ASEDR

200GB ASEFR4

200GB ASELR4

200GB ASEDR4

400GB ASEFR4

400GB ASELR4

400GB ASEDR4

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References

Measurements 50GBA

SE-FR

Average launch power of OFF transmitter

Extinction ratio ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

Total average launch power

Difference in launch power between any two lanes

RINxOMA ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

✓ ✓ NA ✓ ✓ ✓ ✓ ✓ NA

NA NA NA NA ✓ ✓ ✓ ✓ NA

Tektronix clock recovery unit (CRU)

The Tektronix clock recovery unit is configured with the Nominal Data rate (set by the user in GUI), Corner frequency of 10 MHz, Slope of 20 dB/decade, for example, 0 dB peaking, and Lock range of 10 MHz.

50GBA SE-LR

100GB ASEDR

200GB ASEFR4

200GB ASELR4

200GB ASEDR4

400GB ASEFR4

400GB ASELR4

400GB ASEDR4

The CRU locked data rate value is used as the result for the Signaling Rate measurement. The following flow diagram shows the detailed flow used by the CRU locking mechanism in the 400G-TXO application.

80 TekExpress® 400G-TXO Printable Application Help

References

The SUBRATE CLOCK output of the CRU is given to Clock input / Pre-scale of the sampling oscilloscope. The CLK OUTPUT of the CRU is sent to the phase reference module.

NOTE.

■

The 400G-TXO application only supports an external clock recovery unit (optional).

■

Tektronix clock recovery unit supports up to 28 GBd.

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References

Clock / Pre-scalar

The clock signal (synchronous to data) can be provided using either the Tektronix external CRU, or other source having clock signal in synchronous with data and perform similar to the Tektronix external CRU. If you use another trigger source, then you can configure the clock divider parameter.

The clock divider is the ratio of the data rate to the frequency of the clock signal, fed as an input to the phase reference. It is used to determine the frequency of phase characterization (used only if phase reference module is present in one of the slots in the main frame).

Phase characterization frequency = Data rate / Clock divider

Phase reference characterization

The phase reference module is not a mandatory requirement for 400G-TXO measurements. If a phase reference module is present in any of the sampling oscilloscope slots, then the setup provides a clock signal synchronous with data as input to the phase reference module (can use the recovered clock from the CRU). Phase reference characterization is done with the phase correction mode as “triggered” and the input frequency equal to frequency of the input clock signal.

NOTE. The recovered clock frequency from CR286A is half of the data rate, when the data rate is greater than 14.3 Gb/s.

The 400G-TXO application uses only one phase reference module; if the system has multiple modules, then the lower numbered slot is used and others are ignored. This slot/channel information is obtained from the phase reference source query, using the instrument programmatic interface internally.

If there is no phase reference module, then the query results in C1C2 (default), and performs an additional query of model number. If the model number is 82A04B, then proceed with phase reference characterization, otherwise skip the phase reference characterization.

82 TekExpress® 400G-TXO Printable Application Help

References

Parameters

About application

parameters

Setup panel configuration

parameters

This section describes the 400G-TXO application parameters, and includes the default menu settings.

The parameters for the menus, and options list the selections available for each and include the default values.

DUT tab parameters.

Parameters Selection Default Setting

DUTID - DUT001

Mode Compliance, User defined Compliance

Standard DR, FR, LR DR

Speed 50G, 100G, 200G, 400G 200G

Device Profile

Optical Module Settings

Data Rate

50GBASE-FR, 50GBASE-LR, 200GBASE-DR4, 200GBASEFR4, 200GBASE-LR4, 400GBASE-FR8, and 400GBASE-LR8

100GBASE-DR and 400GBASE-DR4

25 GBd to 28.05 GBd 26.5625 GBd

50 GBd to 56 GBd 53.125 GBd

Wavelength None None

Pattern Type 2 to 100000 511

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References

Test Selection tab parameters.

Parameters Selection Default Setting

400G-TXO Measurements

■

Tramsnitter and Dispersion Eye Closure (TDECQ)

■

Average Launch Power

■

Outer Optical Modulation Amplitude

■

Signaling Rate

■

Launch Power in OMAOuter minus TDECQ

■

Extinction Ratio

■

Average Launch Power of Off Transmitter

■

RINxOMA

All measurements selected

Configuration tab parameters.

Table 18: Global settings parameters

Parameters Selection Default Setting

TDECQ Signal Conditioning

Filter None None

Bandwidth None None

Histogram WIdth 2 to 10 4

Population Limit 431100 to 10000000 1000000

Trigger Source

50GBASE-FR, 50GBASE-LR, 200GBASE-DR4, 200GBASE-FR4, 200GBASE-LR4, 400GBASEFR8, and 400GBASE-LR8

100GBASE-DR and 400GBASE-DR4 Others Others

Auto FFE Select, De-select Select

Recall 8SJNB Data Select, De-select De-select

Tek CRU, Others Tek CRU

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References

Preferences tab parameters.

Parameters Selection Default Setting

Acquire/Analyze each test X times

Auto close Warnings and Information during Sequencing Auto close after X Seconds

Auto close Error Messages during Sequencing, Show in Reports Auto close after X Seconds

1 to 200 1

1 to 300 10

Reports panel parameters

Parameters Selection Default Setting

Report name - x:\400G-TXO\Reports

\DUT001.mht

Save as Type PDF (*.pdf;), Web Archive

(*.mht; *.mhtml), CSV (*.csv;)

Web Archive (*.mht; *.mhtml)

TekExpress® 400G-TXO Printable Application Help 85

References

86 TekExpress® 400G-TXO Printable Application Help

Index

100GBASE-DR, vi 200GBASE-DR4, vi 200GBASE-FR4, vi 200GBASE-LR4, vi 400G-TXO features, vi 400G-TXO measurements

average launch power, 42 average launch power of off-transmitter, 49 outer optical modulation amplitude, 44, 47, 48 RINxOMA, 50 signaling rate, 45 transmitter and dispersion eye closure (TDECQ),

400GBASE-DR4, vi 400GBASE-FR8, vi 400GBASE-LR8, vi 50GBASE-FR, vi 50GBASE-LR, vi

Command buttons, 12 Configuration tab, 18 Configuration tab parameter

instruments detected, 22

Configuration tab parameters

global settings, 22

Configuring email notifications, 17 Connected instruments

searching for, 15

Connection requirements, 33 Create a test setup from default settings, 40

DUT ID, 19 DUT parameter

device, 19 device profile, 19

DUT type

device, 19

DUT-instrument setup, 33

About Application Parameters, 83 About TekExpress, vi Acquire parameters

including in test reports, 29 viewing in reports, 31

Acquisition tab, 21 Analysis options, 24 Application directories, 7 Application panels overview, 10 Application version (show), 7

Button

calibration, 21 clear log, 25 Email settings, 24 save, 25

Calibration button, 21

Email notifications, 17 Equipment setup, 33 Extensions, file names, 8

Features (400G-TXO), vi File name extensions, 8

GPIB, 15

Help conventions, 2

Installing the software

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Index

switch matrix application, 6

Instrument-DUT setup, 33 Instruments

discovering connected, 15 viewing connected, 15

Instruments and accessories required, 6 Instruments detected, 22

Keep on top, 9

LAN, 15 License agreement (show), 7 Live waveforms, 19 Loading a test setup, 40 Log view

save file, 25

Menus

Options, 14

Minimum system requirements, 5 My TekExpress folder

files stored in, 28

Names, file extensions, 8 Non-VISA, 15

Opening a saved test setup, 40 Options menu

Instrument control settings, 15 keep on top, 9

Oscilloscope calibration, 35 Oscilloscope compensation, 35

Panels, 10 Pattern, 19

Pattern type, 19 Preferences menu, 27 Preferences tab

send an Email, 24 setup panel, 24

Recalling a test setup, 40 Related documentation, 1 Report contents, 32 Report name, 30 Report options, 29 Report sections, 31 Reports

receiving in email notifications, 17

Reports panel, 10, 28 Resource file, 9 Results panel

summary of test results, 27 test name, 27

Running tests, 38

Save log file, 25 Saving tests, 28 Schematic button (DUT-instrument setup), 33 SCPI commands

Command parameters list, 73 Examples, 77 TEKEXP׃*IDN?, 61 TEKEXP׃*OPC?, 61 TEKEXP׃EXPORT, 62 TEKEXP׃INFO?, 62 TEKEXP׃INSTRUMENT, 63 TEKEXP׃INSTRUMENT?, 63 TEKEXP׃LASTERROR?, 64 TEKEXP׃LIST?, 64 TEKEXP׃MODE, 65 TEKEXP׃MODE?, 66 TEKEXP׃POPUP, 66 TEKEXP׃POPUP?, 67 TEKEXP׃REPORT, 67

88 TekExpress® 400G-TXO Printable Application Help

Index

TEKEXP׃REPORT?, 68 TEKEXP׃RESULT?, 68 TEKEXP׃SELECT, 69 TEKEXP׃SELECT?, 70 TEKEXP׃SETUP, 70 TEKEXP׃STATE, 71 TEKEXP׃STATE?, 71 TEKEXP׃VALUE, 72 TEKEXP׃VALUE?, 72

Selecting test report contents, 29 Selecting tests, 20 Serial, 15 Session folders and files, 28 Setting up equipment, 33 Setup

acquisition tab, 21

Setup files, 39 Setup panel

DUT parameter, 18 preferences tab, 18 test selection, 18

Show acquire parameters, 21 Signal conditioning

bandwidth, 19 filter, 19

Software installation

switch matrix application, 6

Source, 19 Status panel

log view, 25 message history, 25 test status tab, 25

Support, 2 System requirements, 5

Test reports, 31 Test results

emailing, 17

Test selection

400G-TXO, 20 test description, 20

Test selection controls, 20 Test setup files, 28, 39 Test setups

creating, 40 load, 40 open, 40 recalling, 40

Test status

acquire status, 25 analysis status, 25 auto scroll, 25

Test-related files, 28 Tests

running, 38

Trigger source, 22

USB, 15 User Comments

including in reports, 31

View a report, 31 View application license agreement, 7 View application software version, 7 VXI, 15

Technical support, 2 Tek Link, 15 Test Name, 21

TekExpress® 400G-TXO Printable Application Help 89

Waveform files

locating and storing, 28

Wavelength, 19

Index

90 TekExpress® 400G-TXO Printable Application Help

Tektronix TekExpress 400G-TXO Optical Compliance Solution for Sampling Scopes 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

Downloading and installing the software

View software version and license information

Application directories

File name extensions

Operating basics

Launch the application

Application panels overview

Global application controls

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

Reports panel

Reports panel overview

Select report options

View a report

Report contents

Running tests

Equipment connection diagram

Oscilloscope compensation

External attenuation calibration

Running tests

Instrument noise

Saving and recalling test setup

Test setup files overview

Save a test setup

Open (load) a saved test setup

Create a test setup from default settings

Create a new test setup using an existing one

400G-TXO compliance measurements

Transmitter and dispersion eye closure (TDECQ)

Average launch power

Outer optical modulation amplitude

Signaling rate

Launch power in OMAouter minus TDECQ

Extinction ratio

Average launch power of off-transmitter

RINxOMA

SCPI commands

About SCPI command

Socket configuration for SCPI commands

TEKEXP:*IDN?

TEKEXP:*OPC?

TEKEXP:EXPORT

TEKEXP:INFO?

TEKEXP:INSTRUMENT

TEKEXP:INSTRUMENT?

TEKEXP:LASTERROR?

TEKEXP:LIST?

TEKEXP:MODE

TEKEXP:MODE?

TEKEXP:POPUP

TEKEXP:POPUP?

TEKEXP:REPORT

TEKEXP:REPORT?

TEKEXP:RESULT?

TEKEXP:SELECT

TEKEXP:SELECT?