U7232B DisplayPort Electrical Performance Validation and Compliance Software

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. 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 development 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 VESA1 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.

Features

The DisplayPort electrical test software is a full-featured package to simplify the validation process of DisplayPort designs:

— Full Physical Layer Testing High speed Lanes and AUX channel

— Full physical layer testing of AUX channels

— Support of multiple CTS versions

— Test Status tracking

— Support of eDP 1.3

— Support of MyDP/SlimPort (SlimPort is a trademarked implementation of MyDP by Analogix)

— Measurement process configurability

— Support of DualMode, or DP++

— Automated scope measurement setup

— Test results reports with pass/fail margin analysis

— Automation control through AUX Channel Controller

— Optional switch control

With the DisplayPort electrical test software, you can use the same oscilloscope you use for everyday debugging to perform automated testing and margin analysis based on the DisplayPort-specified test checklist.

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.

Test environment setup and test selection

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.The DisplayPort Electrical Performance Validation and Compliance software now allows you to define the DUT capability and select test environment variables to better suit your testing goals for speed and cost. The setup process begins with the Setup entry screen (shown in Figure 1). This screen enables selection of the DisplayPort Compliance test specification (for instance 1.1a or 1.2b as shown in Figure 1) and test groupings for hi-speed video lane testing (Physical Layer Tests), AUX Channel and whole device characteristics (AUX PHY and Inrush Tests), or HDMI over the DisplayPort interface (DualMode tests). This screen will also let you choose between exposing just normative (mandatory) tests or all tests: normative and informative. The bottom portion of the environment Set Up tab is dedicated to automation through the AUX test mode. After making the appropriate selections for you testing, the setup continues with DUT characteristics entry and connection specifics when the Test Setup button is selected.

The Test Setup loop presents a series of screens that allow the user to enter the key test and environment information because there is a wide range of test connections and optional performance allowed for in the DisplayPort specification. Some of this test process information is briefly described below.