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U7243A USB 3.0 Superspeed Electrical Performance Validation

Data Sheets

The U7243A USB 3.0 electrical test software offers several features to simplify the validation of USB 3.0 designs:

  • Automated 1M Unit Interval (or greater) testing for highest accuracy
  • Results consistent with USBIF SigTest software utility
  • Test setup wizard for ease-of-use
  • Wide range of electrical tests
  • USB 3.0 SigTest clock recovery algorith
  • Automated scope measurement setup
  • Test results report generation
  • Pass/fail margin analysis
  • TP1 eye pattern compliance test mask
  • TPO (transmitter) eye pattern test mask
  • CTLE signal correction for TP1 tests

With the USB 3.0 electrical test software, you can use the same oscilloscope you use for everyday debugging to perform automated testing and margin analysis based on the USBIF specified tests.

USB 3.0 compliance testing

To pass signal quality testing at a USBIF-sponsored compliance workshop, your product must successfully pass “Gold Suite” testing, based on the USBIF SigTest application. The SigTest application tests your device against the minimum signal-quality performance requirements for USB 3.0. If you are developing receivers and transmitters for add-in boards and system motherboards, the USB 3.0 electrical test software helps you execute all the SigTest tests and additional oscilloscope already completed tests.

While SigTest tests provide a good overview of USB 3.0 electrical signal quality, they address only a small subset of the electrical compliance measurements speci­fied in the USB 3.0. The SigTest applica­tion also provides minimal reporting capability with pass/fail indication and measurement values, and has limited debugging capabilities to decipher eye mask violations or excessive jitter.

For USB 3.0 measurements, the U7243A software automatically calculates deterministic jitter and total jitter at 10-12 BER. Random jitter is also reported for completeness and a voltage margin “eye” diagram is included in the final HTML report. DJ and TJ values are specified in the USB 3.0 specification and are required for compliance verification.

Benefits

The U7243A USB 3.0 electrical test software saves you time by setting the stage for automatic execution of USB 3.0 electrical tests. Part of the difficulty of performing electrical tests for USB 3.0 is hooking up the oscilloscope, loading the proper setup files, and then analyzing the measured results by comparing them to limits published in the specification. The USB 3.0 electrical test software does much of this work for you. In addition, if you discover a problem with your device, robust debug tools are available to aid in root-cause analysis. These debug tools are provided by the Keysight E2688A high-speed serial data analysis software and N5400A EZJIT Plus jitter analysis software, which you must install on your oscil­loscope to use the USB 3.0 electrical test software.

The U7243A USB 3.0 electrical test software offers many more electrical tests than the SigTest application. Unlike the SigTest application, the U7243A USB 3.0 electri­cal test software automatically configures the oscilloscope for each test, and it provides an informative results report that includes margin analysis indicating how close your product is to passing or failing a particular test assertion. Table 1 shows a side-by-side comparison of the capabilities of the USBIF SigTest application and the Keysight U7243A electrical test software

Easy Test Definition

The U7243A USB 3.0 electrical test software extends the ease-of-use advantages of Keysight’s Infiniium 90000 Series oscilloscopes to testing USB 3.0 designs. The Keysight automated test engine walks you quickly through the steps required to define the tests, set up the tests, perform the tests, and view the test results. You can select a category of tests all at once, or specify individual tests. You can save tests and configurations as project files and recall them later for quick testing and review of previous test results. Straightforward menus let you perform tests with a minimum of mouse clicks

Configurability and Guided Connections

The U7243A USB 3.0 electrical test software provides flexibility in your test setup. It guides you to make connection changes with hookup diagrams when the tests you select require it

Reports with Margin Analysis

In addition to providing you with measurement results, the U7243A USB 3.0 electrical test software provides a report format that shows you not only where your product passes or fails, but also reports how close you are to the limits specified for a particular test as­sertion. You can select the margin test report parameter, which means you can specify the level at which warnings are issued to alert you to electrical tests where your product is operating close to the official test limit defined by the USB 3.0 specification.

Extensibility

You may add additional custom tests or steps to your application using the N5467A User Defined Application (UDA) development tool (www.keysight.com/find/uda). Use UDA to develop functional “Add-Ins” that you can plug into your application.

Add-ins may be designed as:

  • Complete custom tests (with configuration variables and connection prompts)
  • Any custom steps such as pre or post processing scripts, external instrument control and your own device control

Automation

You can completely automate execu­tion of your application’s tests and Add-Ins from a separate PC using the included N5452A Remote Interface feature (download free toolkit from www.keysight.com/find/scope-apps-sw). You can even create and execute automation scripts right inside the application using a convenient built-in client.

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