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U7232E DisplayPort Electrical Performance Validation and Compliance Software

Data Sheets

Keysight U7232E

DisplayPort Electrical Performance Validation and Compliance Software

For Infiniium Series Oscilloscopes

DisplayPort Compliance Software Helps You Do The Right Job Faster

Verify and debug your DisplayPort designs more easily

Keysight Technologies, Inc. DisplayPort Electrical Performance Validation and Compliance software for Infiniium Series oscilloscopes (see Table 2) provides you with a fast and easy way to verify and debug your DisplayPort interface designs for sink and source ICs, motherboard systems, computers and graphics cards and now supports the DisplayPort 1.4 specification. The DisplayPort electrical test software is designed for use in DisplayPort Authorized Compliance Test Houses, so you can confidently use it to execute DisplayPort electrical checklist tests as well as employ it as a characterization tool.

To introduce a DisplayPort product to the market, your product must successfully pass compliance testing based on the DisplayPort specification at an approved DisplayPort test center or through a self certification regimen defined by VESA 1 in cooperation with your company. Either way, you will want to use the DisplayPort Electrical Performance Validation and Compliance software to troubleshoot, if necessary, and then to validate the design by performing the tests before the final compliance test run.

Save time

The DisplayPort Electrical Performance Validation and Compliance software saves you time by setting the stage for automatic execution of DisplayPort electrical tests. Part of the difficulty of performing electrical tests for DisplayPort is connecting the oscilloscope to the target device, configuring the instrument for measurements, executing the test procedures, defining the capabilities of the device under test, and then analyzing the measured results by comparing them to limits published in the specification. The DisplayPort electrical test software does almost all of this work for you. In addition, if you discover a problem with your device, debug tools are available to aid in root-cause analysis.

The DisplayPort software offers the electrical tests for the source as well as important tests for cable and calibration for receiver tolerance testing. The 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 that specification. Clock recovery of each lane is accomplished according to the standard by the oscilloscope using proprietary software techniques. See Table 1 for a complete list of the measurements made by the DisplayPort electrical test software.

Easy test definition

The DisplayPort Electrical Performance Validation and Compliance software extends the ease-of-use advantages of Keysight’s Infiniium Series oscilloscopes to testing DisplayPort designs. The Keysight automated test engine walks you quickly through the steps required to define the device under test, to select the tests, set up the tests, perform the tests, and view the test results. You can pick high-level test parameters to suit your test process objectives, and then you can proceed to select a category of tests all at once, or specify individual tests. The user interface is oriented to minimize reconnections, which saves you time and minimizes potential for operator error. 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.

Further test process control is also provided through the automation tab of graphical user interface. This tab allows the user to tailor scripts to control external equipment such as power supplies and temperature control units, or to provide a different test flow.

Thorough Performance Reporting

The DisplayPort Electrical Performance Validation and Compliance software generates thorough reports that not only capture the performance and status of the device under test, but also the screen shots of your most significant measurements for your perusal and evaluation. The first page of the report lists equipment and configuration details required in standard quality assurance programs. It also provides a hot-linked results table that will quickly get you to the measurement report section of interest.

USB Type-CTM Control

The DisplayPort Electrical Performance Validation and Compliance software fully controls devices that incorporate the USB Type-CTM connector using the new Keysight N7018A Type-C Test Controller. The test controller is required to establish power delivery contracts (known as PDOs: Power Delivery Objects) as well as to place the Device Under Test into the proper alternate mode for DisplayPort. 

Power Delivery Contracts: the thorough testing of devices using the USB Type-C interface will require verification at all the possible power delivery settings and the DisplayPort EPV&C software handles this with ease. In the setup of the Type-C environment, the device is queried for its possible contracts and these are reflected in a PDO selection window and integrated into the test plan using the Keysight N6701C power supply which can handle both the provision and consumption of power. One or many PDOs may be selected; if more than one is selected, the test plan will repeat for each PDO.

Alternate mode: to obtain DisplayPort functionality from a Type-C device, it must be put into a DisplayPort alternate mode and two of these are defined: there is ‘DP 2+2’ mode which has 2 lanes of DP with 2 lanes dedicated to USB3, or, ‘DP 4 Lane’ operation which is standard full bandwidth DisplayPort operation. Alternate mode setting is chosen in the setup of the DisplayPort device.

DisplayPort AUX channel control

The DisplayPort specification allows for automated device control through manipulation of the DPCD (DisplayPort Configuration Data) registers. Those registers are most conveniently controlled by an AUX channel controller. The choice of AUX channel controllers is shown in the ordering information section.

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