Keysight N5990A-155 Display Port. User Guide

Transcription

1 Keysight N5990A-155 Display Port User Guide

2 Notices Keysight Technologies 2017 No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Keysight Technologies as governed by United States and international copyright laws. Manual Part Number N Edition Edition 1.0, April 2017 Keysight Technologies Deutschland GmbH Herrenberger Strasse 130, Böblingen, Germany Technology Licenses The hard ware and/or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license. U.S. Government Rights The Software is commercial computer software, as defined by Federal Acquisition Regulation ( FAR ) Pursuant to FAR and and Department of Defense FAR Supplement ( DFARS ) , the U.S. government acquires commercial computer software under the same terms by which the software is customarily provided to the public. Accordingly, Keysight provides the Software to U.S. government customers under its standard commercial license, which is embodied in its End User License Agreement (EULA), a copy of which can be found at The license set forth in the EULA represents the exclusive authority by which the U.S. government may use, modify, distribute, or disclose the Software. The EULA and the license set forth therein, does not require or permit, among other things, that Keysight: (1) Furnish technical information related to commercial computer software or commercial computer software documentation that is not customarily provided to the public; or (2) Relinquish to, or otherwise provide, the government rights in excess of these rights customarily provided to the public to use, modify, reproduce, release, perform, display, or disclose commercial computer software or commercial computer software documentation. No additional government requirements beyond those set forth in the EULA shall apply, except to the extent that those terms, rights, or licenses are explicitly required from all providers of commercial computer software pursuant to the FAR and the DFARS and are set forth specifically in writing elsewhere in the EULA. Keysight shall be under no obligation to update, revise or otherwise modify the Software. With respect to any technical data as defined by FAR 2.101, pursuant to FAR and and DFARS , the U.S. government acquires no greater than Limited Rights as defined in FAR or DFAR (c), as applicable in any technical data. Warranty THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED "AS IS," AND IS SUBJECT TO BEING CHANGED, WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER, TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, KEYSIGHT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEYSIGHT SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING, USE, OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN. SHOULD KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL. Safety Notices CAUTION A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met. WARNING A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met. 2 Keysight N5990A-155 Display Port User Guide

3 Contents 1 Introduction 2 ValiFrame DisplayPort Station Overview 8 3 Calibration and Test Procedures Document History 10 First Edition (May, 2015) 10 Second Edition (April, 2017) 10 Val iframe DisplayPort Station Configuration 12 Pattern Generator: 13 Use Variable ISI Channel 14 Use Internal ISI, if possible 14 AUX Channel Controller: 14 Use Tx Switch / Use Rx Switch 14 Company Name (scope firmware) 15 Starting ValiFrame DisplayPort Station 17 Configure DUT 18 DUT Parameters 19 Sink PHY Test (with DP Sink) 20 Source Tests Configuration (with DP Source) 23 Example of Calibration and Test Proced ure 28 Connection Diagram 30 Resul t Description 31 Keysight N5990A-155 Display Port User Guide 3

4 Contents DisplayPort Parameters 32 Sequencer Parameters 32 Group Parameters 34 Procedure Parameters 37 4 Connection Diagrams ParBERT 7G Configuration 40 Calibrations 40 Sink Tests 49 JBERT N4903B Configuration 64 Calibrations 64 Sink Tests 69 JBERT M8020A Configuration 74 Calibrations 74 Sink Tests 79 JBERT N4903B and Switch Configuration 83 Calibrations 84 Jitter Tolerance Tests and Expert Mode Tests 86 Zero-Length Tests 88 JBERT M8020A and Switch Configuration 90 Calibrations 91 Jitter Tolerance Tests and Expert Mode Tests 93 Zero-Length Tests 95 Switch Connections 97 4 Keysight N5990A-155 Display Port User Guide

5 Contents 5 Sink Calibration Procedures 6 Sink Test Procedures 7 Source Test Procedures Calibration Overview 102 DisplayPort Sink Calibrations 105 Intersymbol Interference (ISI) Calibration 106 Random Jitter Calibration 110 High Speed Sinusoidal Jitter Calibration 114 Fixed Sinusoidal Jitter Calibration 118 Eye Opening Calibration 122 Aggressor Amplitude Calibration 126 Data Skew Calibration 130 DisplayPort Sink Tests 137 Jitter Tolerance Test 137 Jitter Tolerance Test Zero-Length Cable 140 Jitter Tolerance Characterization Test 143 Data Rate Deviation Test 147 Intra-Pair Skew Test 151 Sensitivity Test 154 Variable Parameter Test 158 Keysight N5990A-155 Display Port User Guide 5

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7 Keysight N5990A-155 Display Port User Guide 1 Introduction Overview / 8 Document History / 10

8 1 Introduction Overview The BitifEye ValiFrame Test Automation software is globally marketed and supported by Keysight Technologies (formerly Agilent Technologies) as N5990A. This document describes the calibrations and test procedures conducted by N5990A ValiFrame for DisplayPort in detail. The N5990A software implements the compliance tests according to the requirements of the latest DP 1.2b MOI (Method of Implementation) draft, and also offers additional custom characterization tests to provide more details of the DUT (Device Under Test) behavior beyond the limits of compliance testing. The ValiFrame DisplayPort Receiver tests support automatic control of the JBERT M8020A and JBERT N4903 high-performance BERTs (Bit Error Ratio Testers), and of the 81250A ParBERT (Parallel Bit Error Ratio Tester)-based DisplayPort generator hardware for physical layer tests, including external clock and jitter sources such as the ESG Vector Signal Generator and the 81160A PulsAr (which are required for the ParBERT setup). An Auxiliary Channel Controller is required-0 as well as suitable ISI (Inter-Symbol Interference) generators. The software runs on a standard Windows XP or Windows 7 PC and controls the hardware test resources through appropriate interfaces such as LAN (Local Area Network). Figure 1, Figure 2 and Figure 3 show the receiver test setup for JBERT and ParBERT configurations. Figure 1 JBERT M8020A Test Setup 8 Keysight N5990A-155 Display Port User Guide

9 Introduction 1 Figure 2 JBERT N4903B Test Setup Figure 3 ParBERT Test Setup The N5990A Test Automation software supports the Keysight (or Agilent) Technologies Electrical Performance and Compliance Test Software U7232C for the DisplayPort Source tests. A real-time oscilloscope (Infiniium Series or higher) is required to run the U7232C software. Keysight N5990A-155 Display Port User Guide 9

10 1 Introduction Document History First Edition (May, 2015) The first edition of this user guide describes functionality of software version 1.0 Second Edition (April, 2017) The second edition of this user guide describes functionality of software version Keysight N5990A-155 Display Port User Guide

11 Keysight N5990A-155 Display Port User Guide 2 ValiFrame DisplayPort Station ValiFrame DisplayPort Station Configuration / 12 Starting ValiFrame DisplayPort Station / 17 Configure DUT / 18 Refer to the for instructions on how to install and start the ValiFrame Test Automation software platform. After the software has been installed, two icons are added to the desktop as shown in Figure 4 on page 12 and Figure 8 on page 17. One is for the Station Configuration and the other for ValiFrame.

12 2 ValiFrame DisplayPort Station ValiFrame DisplayPort Station Configuration The ValiFrame Station Configuration needs to be started prior to ValiFrame. It allows the user to select the application (i.e., MHL, PCI Express 3, HDMI ) and the set of instruments used for it. Start the software with a double-click of the left mouse button on the icon (see Figure 4) or alternatively, start the application from All Programs / BitifEye / DisplayPort / ValiFrame DisplayPort Station Configuration. Figure 4 DisplayPort Station Configuration Icon When the software is started, the Station Selection window appears as shown in Figure 5. The DisplayPort Station is preselected. Figure 5 DisplayPort Station Selection Window If the option N5990A opt. 001 was purchased, the interface to SQL databases (and web browsers) is available. The connection to the database application server is established by clearing the check box correspondence to the default Database Offline selection and entering the IP address of the server. 12 Keysight N5990A-155 Display Port User Guide

13 ValiFrame DisplayPort Station 2 From the Result Viewer The test results can be viewed as Excel or HTML depending on the selection. After the DisplayPort station has been selected, press Next button to continue. The Station Configuration window is displayed as shown in Figure 6. It shows the possible instrument combinations that can be used for DisplayPort testing. It contains such options as: Pattern Generator Use Variable ISI Channel Use Internal ISI, if possible AUX Channel Controller Use Tx Switch / Use Rx Switch Company Name (scope firmware) Figure 6 DisplayPort Station Configuration Window Pattern Generator: ValiFrame supports three different station settings: ParBERT 7G JBERT N4903B JBERT M8020A Keysight N5990A-155 Display Port User Guide 13

14 2 ValiFrame DisplayPort Station Use Variable ISI Channel It is available for all three configurations of Pattern Generator. Select the corresponding check-box to use the variable ISI channel otherwise clear it. With all the configurations, the Artek CLE1000-A2 (Variable ISI Channel) can be selected to fine-tune the ISI value. This box is connected via USB to the PC where ValiFrame is run. If this is not selected, the ISI value needs to be adjusted manually and the selection of the ISI channel is up to the user. Use Internal ISI, if possible It is available only with JBERT M8020A configuration. AUX Channel Controller: For testing, an Auxiliary Channel Controller (short AUX Channel Controller or AUX Controller ) is required. The AUX Channel Controller is the bidirectional communication lane for DisplayPort. ValiFrame supports the following AUX Controllers: Agilent W2642A (obsolete, no longer available) Unigraf DPT 200 For Receiver (short Rx ) tests, the AUX controller is used to read and write the DisplayPort Configuration Data (DPCD) register in order to prepare the DUT for Rx testing and to read the DUT state. For Tx test, the AUX controller is used to read and write the DPCD register in order to control the DUT to generate specific signals. Use Tx Switch / Use Rx Switch This switch allows to reduce the required number of connection changes.the Tx scope app provides switch support. Through the option Use Tx Switch the switch handling will be activated on the scope side. For Rx tests the switch solution is only available for the two JBERT generators N4903B and M8020A. When Use Rx Switch is selected, the Artek CLE1000-A2 is also automatically selected because it is required for the setup. 14 Keysight N5990A-155 Display Port User Guide

15 ValiFrame DisplayPort Station 2 In order to use a BitifEye 2100 Series Switch System for automated receiver test, the ValiFrame option 002 (Switch System Support, available from BitifEye as BIT ) is required. Company Name (scope firmware) Agilent Technologies was the supplier of the initial version of the DisplayPort oscilloscope application software. Since the foundation of Keysight Technologies in 2014, Keysight has supplied this application. Select the proper company name: Agilent (likely holds for oscilloscopes purchased prior to July 2014) Keysight (likely holds for oscilloscopes purchased after July 2014). If you do not know the purchase date or you are not sure about the software supplier company name, check by opening the U7232C software on the oscilloscope and go to Menu > Help > About. In the About dialog, the supplier company name is shown. Once the DisplayPort station is configured, the instrument addresses must be set. An example of the instrument configuration is shown in Figure 7: Figure 7 DisplayPort Instruments Configuration After the installation process, all instruments are configured by default in Offline mode. In this simulation mode, hardware does not need to be physically connected to the test controller PC. The ValiFrame cannot connect to any instrument in this mode. In order to control the instruments Keysight N5990A-155 Display Port User Guide 15

16 2 ValiFrame DisplayPort Station that are connected to the PC, the instrument address must be entered. The address depends on the bus type used for the connection, for example, GPIB (General Purpose Interface BUS) or LAN (Local Area Network). Most of the instruments used in the DisplayPort station use a VISA (Virtual Instrument System Architecture) connection, except the ParBERT and the DisplayPort AUX Controller. To determine the VISA address, run the VISA Connection Expert (right-click on the VISA icon in the task bar and select the first entry Keysight Connection Expert ). Enter the instrument addresses in the Station Configuration Wizard, for example by copying and pasting the address strings from the Connection Expert entries. After the address strings have been entered, click on the Apply Address button before checking the Offline box to set all instruments needed to online and then press Check Connections button to verify that the connections for the instruments are established properly. If anything is wrong in the Instrument Address, a window is displayed with a message describing the problem. NOTE The JBERT M8020A has an option for applying ISI to the output signal. The check box Use internal ISI if possible allows ValiFrame to use this internal ISI channel, which leads to more accuracy and convenience in testing sink DUTs according to DP1.4 at the HBR3-datarate 16 Keysight N5990A-155 Display Port User Guide

17 ValiFrame DisplayPort Station 2 Starting ValiFrame DisplayPort Station Start the ValiFrame DisplayPort station with a double click on the ValiFrame DisplayPort icon on the desktop as shown in Figure 8, or alternatively, start from Start / All Programs / BitifEye / DisplayPort / ValiFrame DisplayPort. Figure 8 ValiFrame DisplayPort Icon Starting the ValiFrame DisplayPort station opens the window shown in Figure 9: Figure 9 ValiFrame DisplayPort User Interface The DUT needs to be configured before any test or calibration procedure is run. Click on the Configure DUT button to pop up the Configure Product window (Figure 10). Keysight N5990A-155 Display Port User Guide 17

18 2 ValiFrame DisplayPort Station Configure DUT The configure Product window allows the user to select Product and Test parameters that are going to be used later in several calibration and test procedures. Some parameters will determine the set of tests displayed. Figure 10 Configure DUT Panel with (right) and without (left) Database Connection If the database option is selected in the ValiFrame DisplayPort Station Selection window (Figure 5), the Configure DUT panel appears as shown on the right side of Figure 10. To configure the DUT with database connection, enter values (any) for Product Number, Serial Number, and Product ID. Then, press on the Register Product button to register the database connection with the provided values. Pressing on Register Product button, enables the button OK. With a click on the OK button, the DUT is configured with the selected parameters. The procedures run with the database settings are stored at ValiFrame Webviewer and those can be viewed by selecting the Product Number and Serial Number (these values should be the same as those provided in Figure Keysight N5990A-155 Display Port User Guide

19 ValiFrame DisplayPort Station 2 DUT Parameters In Figure 10 the DUT parameters, such as Product type, CTS Version and compliance mode or expert mode can be selected. The DUT Parameters are listed in Table 1. Table 1 DUT Parameter List Parameter name Description Products Parameter Product Number Serial Number Product Type Shows the name of the product. Currently Display Port is available. It is used to identify the product when database option is selected. Shows the serial number of the product. It is used to identify the product when database option is selected. The Product type can be chosen as: DP Sink: PC Monitors DP Source: Computer, Motherboards, ICs, Graphic Cardst edp Sink edp Source Port Name It sets the port name from number 1, 2, Description Number of Lanes CTS Version Description of the product. DUTs with 1, 2 or 4 lanes can be tested. The selected CTS version defines the calibrations and tests according to the DisplayPort CTS revision. Two available CTS Version are: DP 1.2b DP 1.4 (Pre): Currently it is marked as pre-edit version (Pre) because the CTS for DP1.4 was not approved recently at the release date of this software. Test Parameters User Name Comment Initial Start Date Last Test Date Compliance Mode Expert Mode User name text field. Text file for user comments. Time stamp of the start of the current session. Time stamp of the last test conducted in the current session. Test are conducted as mandated by the CTS and they run according to the specific test specification. The parameters that are shown in the calibrations and test procedures cannot be modified by the user. Calibration and tests can be conducted beyond the limits and constrains of the CTS. The parameters that are shown in the calibrations and test procedures can be modified by the user. The DUT can be characterized to determine performance margins. It is provided for advanced users and includes additional tests as well as additional parameters to run tests differently than in compliance mode. Keysight N5990A-155 Display Port User Guide 19

20 2 ValiFrame DisplayPort Station There are four test configurations for Sink and Source. Each one has different parameters to select, which characterize the tests. Following are the test configurations: Sink PHY Test (with DP Sink) Source Tests Configuration (with DP Source) Sink PHY Test (with edp Sink): Refer to Keysight DisplayPort Extended Tests Embedded DisplayPort DisplayPort Type-C (via USB-C)-User Guide. Source Tests Configuration (with edp Source): Refer to Keysight DisplayPort Extended Tests Embedded DisplayPort DisplayPort Type-C (via USB-C)-User Guide. Sink PHY Test (with DP Sink) This configuration appears when DP Sink is selected as Product Type. There are two parameter groups which offer different possibilities for running the test and calibrations: Basic parameters such as the data rates supported by the DUT. See Figure 11. Figure 11 Sink PHY Test - Basic (with DP Sink as Product Type) Advanced parameters are useful features for debugging purposes. See Figure Keysight N5990A-155 Display Port User Guide

21 ValiFrame DisplayPort Station 2 Figure 12 Sink PHY Test - Advanced (with DP Sink as Product Type) All the Sink configuration parameters are described in Table 2. Table 2 Sink PHY Test Parameters (with DP Sink as Product Type) Parameter name Parameter Description Basic Parameter Supported Data Rates Plug Fixture Receptacle Fixture TPS3 Supported Depending on the maximum supported data rate, different sets of tests will be displayed. Select the Plug Fixture from the following available options: Wilder Technologies DP-TPA-P Agilent DP Plug Fixture W2641B mdp Plug Fixture Luxshare Type-C Plug Fixture: With this option selected, Receptacle Fixture will be by default selected as Luxshare Type-C Receptable Fixture. Additionally, an option is available to select or clear DUT is a Dongle-Adapter. Keysight DP Plug Fixture W2641B: With this option selected, Receptacle Fixture will be by default selected as Keysight Type-C N7015A+N7017A. Additionally, an option is available to select or clear DUT is a Dongle-Adapter. Select the Receptacle Fixture from the following available options: Wilder Technologies DP-TPA-R BitifEye DP-RTF-0001 BitifEye DP-RTF-0002 If the device supports data rates higher than HBR, then it has to support TPS3. If it supports data rates lower than HBR, TPS3 is just recommended. You can clear this option in Expert mode, as DUT does not exactly follow the spec. Ad vanced Parameters Use Differential Probe for Calibration Use 4-Way Dividers for Aggressor Lanes Differential probes can be used for the calibrations instead of Direct SMA Single-Ended connections. For ParBERT setup, power dividers can be used or not (one clock generator or 3 clock generators). If they are selected, they can be 4-way or 3-way power dividers. For JBERT N4903B setup, the use of power dividers is mandatory, but they can be 4-way or 3-way power dividers. For JBERT M8020A setup, only 3-way power dividers can be used. Keysight N5990A-155 Display Port User Guide 21

22 2 ValiFrame DisplayPort Station Parameter name Use Default Average Value Keep Signals after test Skip Link Training ISI Cal Lane per Lane DPCD Revision 1.1 Parameter Description Some calibrations give slightly different results after each run. The calibration is more accurate, if ValiFrame takes the mean out of several measurements. But the calibration will take significant longer. If this option is selected, ValiFrame makes a well tried amount of each calibration point. But if this option is cleared each point is measured only once. When the test is done, ValiFrame keeps the tested signal, and the user can check it on the scope. Frequency lock and symbol lock are skipped during Sink testing. An ISI calibration for each lane will be performed. If this box is not checked, the same ISI calibration table will be used for every lane test. This is recommended if the BitifEye DP-RTF-0001 or BitifEye DP-RTF-0002 receptacle fixture is used. If this option is selected, the DPCD Revision 1.1 register layout will be used during testing regardless of the CTS version. Aux -Controller Agilent W2642A AUX Unigraf DPT-2100 AUX Controller Dummy AUX Controller Custom BER Reader Query DUT capabilities It is available when Agilent W2642A AUX Controller is selected in the Station Configuration. It is available when Unigraf DPT-2100 AUX controller is selected in the Station Configuration. If this AUX controller is selected, ValiFrame will ask the user for setting some values or reading out some DPCD content during a test run and type them into dialog boxes. The Custom BER Reader is an interface for accessing the DUTs DPCD without an AUX channel. It is set up by the customer and it allows to run link training and complete test in a none standard way. After clicking on this button, the capabilities of the DUT are requested via the AUX Controller. Optionally, the tests can be configured according to these capabilities. This button is only visible, if an AUX-controller is connected. 22 Keysight N5990A-155 Display Port User Guide

23 ValiFrame DisplayPort Station 2 Source Tests Configuration (with DP Source) This configuration appears when DP Source is selected as Product Type. Figure 13 and Figure 14 show the Configure Product section for the Source Test Configuration parameters. NOTE For Product Type as DP Source, currently CTS Version DP 1.2b and DP 1.4 (Pre) are available. Basic Figure 13 Source Tests Configuration - Basic (with DP Source as Product Type) Advanced Figure 14 Source Tests Configuration - Advanced (with DP Source as Product Type) There are some tests that appear only if the maximum supported data rate is HBR2. For this data rate, it is also possible to choose one of the preferred settings, according to the combinations of Table 4. Keysight N5990A-155 Display Port User Guide 23

24 2 ValiFrame DisplayPort Station All the Source configuration parameters are described in Table 3: Table 3 Sink PHY Test Parameters (with DP Source as Product Type) Parameter name Parameter Description Basic Parameter Supported Data Rates SSC Enabled Dual Mode Tests TPS3 Supported Automation Setup... Depending on the maximum supported data rate, different sets of tests will be displayed. Select the check-box, if the source supports SSC modulation. In that case, additional tests are added to the Source Test (D10.2) group. If is set to True, the test tree shows the Dual Mode physical layer tests. The scope connection type for these tests need to be selected as Single-Ended or Differential. If the device supports data rates higher than HBR, then it has to support TPS3. If it supports data rates lower than HBR, TPS3 is just recommended. You can clear this option in Expert mode, as DUT does not exactly follow the spec. The Automation Setup button allows the automation to be enabled. Ad vanced Parameters Post Cursor 2 Voltage Swing Pre- Emphasis HBR2 With Cable Pref. Settings HBR2 Without Cable Pref. Settings Allow to select all post-cursor2 levels supported. Allow to select all the voltage swing levels supported. Allow to select all pre-emphasis levels supported. Allow to choose the preferred setting for the PostCursor, Swing and pre-emphasis levels for HBR2 tests with cable. Allow to choose the preferred setting for the PostCursor, Swing and pre-emphasis levels for HBR2 tests without cable. 24 Keysight N5990A-155 Display Port User Guide

25 ValiFrame DisplayPort Station 2 Table 4 Data Table for DUT Parameters (with DP Source as Product Type) Parameter name Description Level 0 Vdiff_pre_p Level 1 Vdiff_pre_p Level 2 Vdiff_pre_p Level 3 Vdiff_pre_p Voltage Swing Level Voltage Swing Level 1 Voltage Swing Level 2 Voltage Swing Level 3 Required Required Required Optional Required Required Required Not allowed Required Required Not allowed Not allowed Optional Not allowed Not allowed Not allowed Automation Setup... The Automation Setup button allows the automation to be enabled as shown in Figure 15. The Driver option in the Automation Setup can be selected as: Agilent W2642A: It requires two fields IP Address and Script Path to be defined. By default is the IP Address. UnigrafDPTC: It requires only Script Path to be defined. NOTE Keysight W2642A controller is not longer supported by the scope app U7232D or later. Keysight N5990A-155 Display Port User Guide 25

26 2 ValiFrame DisplayPort Station Figure 15 Automation Control Dialog When the DUT configuration is finished, click on the OK button, the oscilloscope connection must be specified by selecting the Direct SMA connections and Differential Probe connections that are going to be used (Figure 16). It is recommended that you use the same number of differential connections as SMA connections, in order to have access to all the possible tests and the least number of re-connections. Figure 16 Oscilloscope Connection Dialog 26 Keysight N5990A-155 Display Port User Guide

27 Keysight N5990A-155 Display Port User Guide 3 Calibration and Test Procedures Example of Calibration and Test Procedure / 28 Connection Diagram / 30 Result Description / 31 DisplayPort Parameters / 32 During the execution of all calibration and test procedures, the results are displayed automatically in a data table as well as graphically. The viewer can be either a MS-Excel or a HTML worksheet; this can be chosen in the Station Configuration window (see Figure 5). Once a specific calibration or test procedure is finished, the MS Excel/HTML worksheet is closed. To reopen it at any time, double click on the respective procedure. All calibration and test data worksheets can be saved in a workbook by selecting File > Save Results as Workbook at any time. It is recommended that this step is carried out at least at the end of each ValiFrame run. If the calibration and test procedures are conducted during the same ValiFrame run, the calibration and test result worksheets are combined in the workbook. If a test procedure is conducted without prior execution of calibration procedures in the same test run, only the test results will be saved to the workbook. As a safety feature, all calibration and test procedure results are saved by default to the ValiFrame Tmp directory. In addition to the calibration data worksheets, calibration data files are also generated. These files are saved by default to the ValiFrame calibrations folder (refer to N5990A_Getting_Started_Guide.pdf ).

28 3 Calibration and Test Procedures Example of Calibration and Test Procedure All calibration and test procedures are organized in corresponding groups, such as Calibration and Sink Lane X for Sink devices and Source PHY for Source devices. For most of the calibration and test procedures, some specific parameters can be set in expert mode by the user. In Figure 17, the ISI Calibration RBR procedure is highlighted as an example and the respective calibration parameters are shown on the right-hand side of the ValiFrame user interface. This is achieved by clicking on the calibration name. To start the calibration or test procedure, check the box corresponding to the selected procedure. Then, the Start button is enabled and colored green. Pressing the Start button runs the calibration/test. Figure 17 Example for DisplayPort Calibration and Test Procedure 28 Keysight N5990A-155 Display Port User Guide

29 Calibration and Test Procedures 3 CAUTION Before executing any calibration or test procedure, ensure that the DisplayPort Station Configuration is conducted properly with all necessary instruments such as the Infiniium oscilloscope and JBERT set to online. All calibrations can be run in offline mode, this means, without any instrument connected. The offline mode is intended for product demonstrations with simulated data. Calibrations that are run in Offline mode do not generate valid calibrated values. Figure 18 Indication of OfflineMode Keysight N5990A-155 Display Port User Guide 29

30 3 Calibration and Test Procedures Connection Diagram Figure 19 Show Connection Dialog The connection diagram is displayed by right clicking on the desired test or calibration and selecting Show Connection as shown in Figure 19. Alternatively, the connection diagram is displayed automatically on starting the selected test or calibration. 30 Keysight N5990A-155 Display Port User Guide

31 Calibration and Test Procedures 3 Result Description Once the selected procedures are running successfully, the individual procedure displays the result by representing the smiley in different styles such as given below (see Figure 5). Table 5 Smiley's Result description Smiley Description Indicates that the procedure passed successfully at the previous run and the results are available. Indicates that the procedure was passed in offline mode previously and the results are available. Indicates that the procedure passed successfully at the present run. Indicates that the procedure was aborted/disturbed somehow and failed at the previous run. Indicates that the procedure was aborted/disturbed somehow and failed at the present run. Indicates that the procedure failed at the previous run. Indicates that the procedure failed at the present run. Generally this kind of smiley displays two results such as the first half indicates that the result of the present run and the second half shows the result of the previous run. In this example, the first half indicates that the procedure passed successfully at the present run and the second half means that it was not completely run at the previous run. Keysight N5990A-155 Display Port User Guide 31

32 3 Calibration and Test Procedures DisplayPort Parameters The DisplayPort parameters are of three types: Sequencer Parameters Group Parameters Procedure Parameters Sequencer Parameters The sequencer parameters control the flow of the test sequencer, not the behavior of individual procedures. They are identical across all versions of ValiFrame. One of them, Repetitions, is available for all procedures and groups in the procedure tree. The others are only available for procedures. Like all other parameters, the sequencer parameters are shown on the right side of the ValiFrame user interface and they can be changed by the user as illustrated in Figure Keysight N5990A-155 Display Port User Guide

33 Calibration and Test Procedures 3 Figure 20 DisplayPort Sequencer Parameters All sequencer parameters are listed in alphabetical order in Figure 6. Keysight N5990A-155 Display Port User Guide 33

34 3 Calibration and Test Procedures Table 6 DisplayPort Sequencer Parameters Parameter name Procedure Error Case Behavior Procedure Failed Case Behavior Repetitions Description Proceed With Next Procedure : If an error occurs in the current test or calibration procedure, continue by running the next procedure in the sequence. Abort Sequence : Abort the execution of the sequence. Proceed With Next Procedure : If the current test or calibration procedure fails, continue by running the next procedure in the sequence. Abort Sequence : Abort the execution of the sequence. The number of times the group or procedure is going to be repeated. If the value is '0', it runs only once. Group Parameters The group parameters are used for several related calibration or test procedures. They are shown on the right side of the ValiFrame user interface when the selected entry of the procedure tree on the left is a group instead of an individual procedure. The DisplayPort Test Software has two other group parameters (in addition to Repetitions) on the top level of the procedure tree as shown in Figure 21. These will be common to all ValiFrame procedures. 34 Keysight N5990A-155 Display Port User Guide

35 Calibration and Test Procedures 3 Figure 21 DisplayPort Group Parameters Keysight N5990A-155 Display Port User Guide 35

36 3 Calibration and Test Procedures The following Table 7 describes the group parameters: Table 7 DisplayPort Group Parameters Parameter name Parameter Description DisplayPort Repetitions Alternative Scope Data Channels Alternative Scope Explicit Clock Channel The number of times the group or procedure is going to be repeated. If the value is '0', it runs only once If is set to False, Channel 1 (differential) and Channels 1-3 (single-ended) will be used as scope data channels. If is set to True, Channel 2 (differential) and Channels 2-4 (single-ended) will be used as scope data channels. The scope channel used for the clock source depends on the selection of this property and the Alternative Scope Data Channels property. For differential connection type: If Alternative Scope Explicit Clock Channel is set to False, use CH4 If Alternative Scope Explicit Clock Channel is set to True, use CH3 For single-ended connection type: If Alternative Scope Explicit Clock Channel is set to False and Alternative Scope Explicit Data Channels = False, use CH4 If Alternative Scope Explicit Clock Channel is set to False and Alternative Scope Explicit Data Channels = True, use CH1 If Alternative Scope Explicit Clock Channel is set to True and Alternative Scope Explicit Data Channels = False, use CH2 If Alternative Scope Explicit Clock Channel is set to True and Alternative Scope Explicit Data Channels = True, use CH3 36 Keysight N5990A-155 Display Port User Guide

37 Calibration and Test Procedures 3 Procedure Parameters The Procedure Parameters are all parameters that do not fall into one of the previously described categories. They are shown on the right side of the ValiFrame user interface when the selected entry of the procedure tree on the left is an individual procedure. They only change the behavior of that single procedure. Procedures often have parameters with the same name, but settings always apply only on a procedure basis, and the meaning may be slightly different. These parameters are listed in the chapters dealing with the procedure they belong to. Keysight N5990A-155 Display Port User Guide 37

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39 Keysight N5990A-155 Display Port User Guide 4 Connection Diagrams ParBERT 7G Configuration / 40 JBERT N4903B Configuration / 64 JBERT M8020A Configuration / 74 JBERT N4903B and Switch Configuration / 83 JBERT M8020A and Switch Configuration / 90 Switch Connections / 97 For each configuration, use the required instrument list for DP1.2b and also for DP1.4 (Pre) according to the MOI.

40 4 Connection Diagrams ParBERT 7G Configuration Calibrations Calibration is performed for Lane 0, Lane 1, Lane 2, Lane 3 and Aggressor Amplitude Calibration RBR/Aggressor Amplitude Calibration HBR/Aggressor Amplitude Calibration HBR2, as shown in the following figure: Figure 22 List of Calibration procedures using ParBERT 7G Configuration 40 Keysight N5990A-155 Display Port User Guide

41 Connection Diagrams 4 Connection Setup for Lane 0 calibration Following figure shows the connection setup for Lane 0 calibration using ParBERT 7G configuration: Figure 23 Connection setup for Lane 0 using ParBERT 7G Calibrations (with ISI Box) Keysight N5990A-155 Display Port User Guide 41

42 4 Connection Diagrams Instructions: Connect the vector signal generator RF OUTPUT to the first ParBERT clock module CLK INPUT. Connect the function/arbitrary generator OUT 1 to the ParBERT generator DELAY CTRL input of the first ParBERT group. Connect the data output OUT of the data ParBERT generator group to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 output to the lane under test of the DisplayPort Plug fixture. Connect the aggressor lanes via blocking capacitors and 150 ps TTCs to the DisplayPort Plug fixture according to your setup: With power divider: connect the data output of the first clock ParBERT generator to the 3- or 4-way power dividers. Connect the power divider outputs to the aggressor lanes of the fixture. Without power dividers: connect each output of the clock ParBERT generators to each aggressor lane of the DisplayPort Plug fixture. Connect the lane under test from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: either with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output of the first data ParBERT generator group. Connect 50 Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture. 42 Keysight N5990A-155 Display Port User Guide

43 Connection Diagrams 4 Connection Setup for Lane 1 calibration Following figure shows the connection setup for Lane 1 calibration using ParBERT 7G configuration: Figure 24 Connection setup for Lane 1 using ParBERT 7G Calibrations (with ISI Box) Keysight N5990A-155 Display Port User Guide 43

44 4 Connection Diagrams Connection Setup for Lane 2 calibration Following figure shows the connection setup for Lane 2 calibration using ParBERT 7G configuration: Figure 25 Connection setup for Lane 2 using ParBERT 7G Calibrations (with ISI Box) 44 Keysight N5990A-155 Display Port User Guide

45 Connection Diagrams 4 Connection Setup for Lane 3 calibration Following figure shows the connection setup for Lane 3 calibration using ParBERT 7G configuration: Figure 26 Connection setup for Lane 3 using ParBERT 7G Calibrations (with ISI Box) Keysight N5990A-155 Display Port User Guide 45

46 4 Connection Diagrams Connection Setup for Aggressor Amplitude Calibration Following figure shows the connection setup for Aggressor Amplitude Calibration using ParBERT 7G configuration: Figure 27 Connection setup using ParBERT 7G for Aggressor Amplitude Calibration (with ISI Box) 46 Keysight N5990A-155 Display Port User Guide

47 Connection Diagrams 4 Instructions: Connect the vector signal generator RF OUTPUT to the first ParBERT clock module CLK INPUT. Connect the function/arbitrary generator OUT 1 to the ParBERT generator DELAY CTRL input of the first ParBERT group. Connect the data output OUT of the data ParBERT generator group to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 output to the lane under test of the DisplayPort Plug fixture. Connect the aggressor lanes via blocking capacitors and 150 ps TTCs to the DisplayPort Plug fixture according to your setup: With power divider: connect the data output of the first clock ParBERT generator to the 3- or 4-way power dividers. Connect the power divider outputs to the aggressor lanes of the fixture. Without power dividers: connect each output of the clock ParBERT generators to each aggressor lane of the DisplayPort Plug fixture. Connect one of the aggressor lanes (any lane other than the lane under test) from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: either with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output of the first data ParBERT generator group. Connect 50 Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture. Keysight N5990A-155 Display Port User Guide 47

48 4 Connection Diagrams Connection Setup for Skew Calibration Following figure shows the connection setup for Data Skew Calibration using ParBERT 7G configuration: NOTE Skew calibration procedure is available in Expert Mode only. Figure 28 Connection setup using ParBERT 7G for Data Skew Calibration Instructions: Connect the vector signal generator RF OUTPUT to the first ParBERT clock module CLK INPUT. Connect the function/arbitrary generator OUT 1 to the ParBERT generator DELAY CTRL input of the first ParBERT group. Connect the data output OUT of the first ParBERT generator group of the second ParBERT clock module to the Probe input of the second ParBERT clock module, using a SMA-to-BCN adapter 48 Keysight N5990A-155 Display Port User Guide

49 Connection Diagrams 4 Sink Tests Sink Tests are performed for Lane 0, Lane 1, Lane 2 and Lane 3 as shown in following figure: Figure 29 List of Sink Tests using ParBERT 7G Configuration Keysight N5990A-155 Display Port User Guide 49

50 4 Connection Diagrams Connection Setup for Sink Test Lane 0 Sink Test Lane 0 are performed for Jitter Tolerance Tests, Zero-Length Tests and Expert Mode Tests whose connection setup are as following: 1 Jitter Tolerance Test: Following figure shows the connection setup for Jitter Tolerance Test using the ParBERT 7G configuration: Figure 30 Connection setup of Jitter Tolerance Test for Lane 0 using ParBERT 7G 50 Keysight N5990A-155 Display Port User Guide

51 Connection Diagrams 4 Instructions: Connect the vector signal generator RF OUTPUT to the first ParBERT clock module CLK INPUT. Connect the function/arbitrary generator OUT 1 to the ParBERT generator DELAY CTRL input of the first ParBERT group. Connect the data output OUT of the data ParBERT generator group to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 output to the lane under test of the DisplayPort Plug fixture. Connect the aggressor lanes via blocking capacitors and 150 ps TTCs to the DisplayPort Plug fixture according to your setup: With power divider: connect the data output of the first clock ParBERT generator to the 3- or 4-way power dividers. Connect the power divider outputs to the aggressor lanes of the fixture. Without power dividers: connect each output of the clock ParBERT generators to each aggressor lane of the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. Keysight N5990A-155 Display Port User Guide 51

52 4 Connection Diagrams 2 Zero-Length Tests: Following figure shows the connection setup for Zero-Length tests for Lane 0 using the ParBERT 7G configuration: Figure 31 Connection setup using ParBERT 7G of Zero-Length Test for Lane 0 52 Keysight N5990A-155 Display Port User Guide

53 Connection Diagrams 4 Instructions: Connect the vector signal generator RF OUTPUT to the first ParBERT clock module CLK INPUT. Connect the function/arbitrary generator OUT 1 to the ParBERT generator DELAY CTRL input of the first ParBERT group. Connect the data output OUT of the data ParBERT generator group to the lane under test of the DisplayPort Plug fixture via blocking capacitors and 60ps TTCs (no ISI channel). Connect the aggressor lanes via blocking capacitors and 150 ps TTCs to the DisplayPort Plug fixture according to your setup: With power divider: connect the data output of the first clock ParBERT generator to the 3- or 4-way power dividers. Connect the power divider outputs to the aggressor lanes of the fixture. Without power dividers: connect each output of the clock ParBERT generators to each aggressor lane of the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. NOTE In DisplayPort Software version 2.40 and later, the ISI-Box can remain in the setup during the zero length test. It is disabled and doesn t apply extra ISI to the test signal. Keysight N5990A-155 Display Port User Guide 53

54 4 Connection Diagrams 3 Expert Mode Test: Following figure shows the connection setup of Expert Mode tests for Lane 0 using the ParBERT 7G configuration: Figure 32 Connection setup using ParBERT 7G of Expert Mode Test for Lane 0 54 Keysight N5990A-155 Display Port User Guide

55 Connection Diagrams 4 Connection Setup for Sink Test Lane 1 Sink Test Lane 1 are performed for Jitter Tolerance Tests, Zero-Length Tests and Expert Mode Tests, whose connection setups are as following: 1 Jitter Tolerance Test: Following figure shows the connection setup for Jitter Tolerance Test for Lane 1 using the ParBERT 7G configuration: Figure 33 Connection setup using ParBERT 7G of Jitter Tolerance Test for Lane 1 Keysight N5990A-155 Display Port User Guide 55

56 4 Connection Diagrams 2 Zero-Length Tests: Following figure shows the connection setup of Zero-Length tests for Lane 1 using the ParBERT 7G configuration: Figure 34 Connection setup using ParBERT 7G of Zero-Length Test for Lane 1 56 Keysight N5990A-155 Display Port User Guide

57 Connection Diagrams 4 3 Expert Mode Test: Following figure shows the connection setup of Expert Mode tests for Lane 0 using the ParBERT 7G configuration: Figure 35 Connection setup using ParBERT 7G of Expert Mode Test for Lane 1 Keysight N5990A-155 Display Port User Guide 57

58 4 Connection Diagrams Connection Setup for Sink Test Lane 2 Sink Test Lane 2 are performed for Jitter Tolerance Tests, Zero-Length Tests and Expert Mode Tests, whose connection setups are as following: 1 Jitter Tolerance Test: Following figure shows the connection setup of Jitter Tolerance Test for Lane 2 using the ParBERT 7G configuration: Figure 36 Connection setup using ParBERT 7G of Jitter Tolerance Test for Lane 2 58 Keysight N5990A-155 Display Port User Guide

59 Connection Diagrams 4 2 Zero-Length Tests: Following figure shows the connection setup of Zero-Length tests for Lane 0 using the ParBERT 7G configuration: Figure 37 Connection setup using ParBERT 7G of Zero Length Test for Lane 2 Keysight N5990A-155 Display Port User Guide 59

60 4 Connection Diagrams 3 Expert Mode Test: Following figure shows the connection setup of Expert Mode tests for Lane 2 using the ParBERT 7G configuration: Figure 38 Connection setup using ParBERT 7G of Expert Mode Test for Lane 2 60 Keysight N5990A-155 Display Port User Guide

61 Connection Diagrams 4 Connection Setup for Sink Test Lane 3 Sink Test Lane 3 are performed for Jitter Tolerance Tests, Zero-Length Tests and Expert Mode Tests, whose connection setups are as following: 1 Jitter Tolerance Test: Following figure shows the connection setup of Jitter Tolerance Test for Lane 3 the using ParBERT 7G configuration: Figure 39 Connection setup using ParBERT 7G of Jitter Tolerance Test for Lane 3 Keysight N5990A-155 Display Port User Guide 61

62 4 Connection Diagrams 2 Zero-Length Tests: Following figure shows the connection setup for Zero-Length tests for Lane 3 using the ParBERT 7G configuration: Figure 40 Connection setup using ParBERT 7G of Zero-Length Test for Lane 3 62 Keysight N5990A-155 Display Port User Guide

63 Connection Diagrams 4 3 Expert Mode Test: Following figure shows the connection setup of Expert Mode tests for Lane 0 using the ParBERT 7G configuration: Figure 41 Connection setup using ParBERT 7G of Expert Mode Test for Lane 3 Keysight N5990A-155 Display Port User Guide 63

64 4 Connection Diagrams JBERT N4903B Configuration Calibrations Calibration is performed for Lane 0, Lane 1, Lane 2, Lane 3 and Aggressor Amplitude Calibration RBR/Aggressor Amplitude Calibration HBR/Aggressor Amplitude Calibration HBR2, as shown in following figure: Figure 42 List of Calibration procedures using JBERT N4903B Configuration 64 Keysight N5990A-155 Display Port User Guide

65 Connection Diagrams 4 Connection Setup for Lane 0 Following figure shows the connection setup for Lane 0 calibration using JBERT N4903B configuration: Figure 43 Connection setup using JBERT N4903B Calibrations for Lane 0 (with ISI Box) Keysight N5990A-155 Display Port User Guide 65

66 4 Connection Diagrams Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 to the lane under test of the DisplayPort Plug fixture. Connect the JBERTTRIGGER/REF CLK output to the 3-way power dividers (4-way if you selected them in the Product Configuration) via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect the lane under test from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output CLK of the JBERT. Connect a 50Ω termination to the negative clock output. Connect 50Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture. Connection setup for Lane1, Lane 2 and Lane 3 Same as Connection Setup for Lane 0 on page 65, with only difference that for Lane 1 connect 60ps TTCs with R1 for Lane 2 connect 60ps TTCs with R2 for Lane 3 connect 60ps TTCs with R3. 66 Keysight N5990A-155 Display Port User Guide

67 Connection Diagrams 4 Connection setup for Aggressor Amplitude Calibration Following figure shows the connection setup for Aggressor Amplitude Calibration using JBERT N4903B configuration: Figure 44 Connection setup using JBERT N4903B Aggressor Amplitude Calibration for Lane 0 (with ISI Box) Keysight N5990A-155 Display Port User Guide 67

68 4 Connection Diagrams Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 to the lane under test of the DisplayPort Plug fixture. Connect the JBERTTRIGGER/REF CLK output to the 3-way power dividers (4-way if you selected them in the Product Configuration) via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect one of the aggressor lanes (any lane other than the lane under test) from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output CLK of the JBERT. Connect a 50 Ω termination to the negative clock output. Connect 50 Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture. 68 Keysight N5990A-155 Display Port User Guide

69 Connection Diagrams 4 Sink Tests Sink tests are performed for Lane 0, Lane 1, Lane 2 and Lane 3 as shown in following figure: Figure 45 List of Sink Tests using JBERT N4903B Configuration Keysight N5990A-155 Display Port User Guide 69

70 4 Connection Diagrams Connection Setup for Sink Test Lane 0 Sink Test Lane 0 are performed for Jitter Tolerance Tests, Zero-Length Tests and Expert Mode Tests, whose connection setups are as following: 1 Jitter Tolerance Test and Expert Mode Tests: Following figure shows the connection setup pf Jitter Tolerance Test for Lane 0 using the JBERT N4903B configuration: Figure 46 Connection setup for using JBERT N4903B for Sink Tests Lane 0 and Expert Mode Tests 70 Keysight N5990A-155 Display Port User Guide

71 Connection Diagrams 4 Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 to the lane under test of the DisplayPort Plug fixture. Connect the JBERTTRIGGER/REF CLK output to the 3-way power dividers (4-way if you selected them in the Product Configuration) via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. Keysight N5990A-155 Display Port User Guide 71

72 4 Connection Diagrams 2 Zero-Length Tests: Following figure shows the connection setup of Zero-Length tests for Lane 0 using the JBERT N4903B configuration: Figure 47 Connection setup using JBERT N4903B of Zero Length Tests for Lane 0 72 Keysight N5990A-155 Display Port User Guide

73 Connection Diagrams 4 Instructions: Connect the JBERT data output to the lane under test of the DisplayPort Plug fixture via blocking capacitors and 60 ps TTCs. Connect the JBERTTRIGGER/REF CLK output to the 3-way power dividers (4-way if you selected them in the Product Configuration) via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. Connection Setup for Sink Test Lane 1, Lane 2 and Lane 3 Same as Connection Setup for Sink Test Lane 0 on page 70, with only difference that for Lane 1 connect 60ps TTCs with R1 for Lane 2 connect 60ps TTCs with R2 for Lane 3 connect 60ps TTCs with R3. Keysight N5990A-155 Display Port User Guide 73

74 4 Connection Diagrams JBERT M8020A Configuration Calibrations Calibration is performed for Lane 0, Lane 1, Lane 2, Lane 3 and Aggressor Amplitude Calibration RBR/Aggressor Amplitude Calibration HBR/Aggressor Amplitude Calibration HBR2, as shown in following figure: Figure 48 List of Calibration procedures using JBERT M8020A Configuration 74 Keysight N5990A-155 Display Port User Guide

75 Connection Diagrams 4 Connection Setup for Lane 0 calibration Following figure shows the connection setup for Lane 0 calibration using JBERT M8020A configuration: Figure 49 Connection setup using JBERT M8020A Calibrations for Lane 0 (with ISI Box) Keysight N5990A-155 Display Port User Guide 75

76 4 Connection Diagrams Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 to the lane under test of the DisplayPort Plug fixture. Connect the JBERTTRIG output to the 3-way power dividers via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect the lane under test from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output CLK of the J-BERT. Connect a 50 Ω termination to the negative clock output. Connect 50 Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture Connection setup for Lane1, Lane 2 and Lane 3 Same as Connection Setup for Lane 0 calibration on page 75, with only difference that for Lane 1 connect 60ps TTCs with R1 for Lane 2 connect 60ps TTCs with R2 for Lane 3 connect 60ps TTCs with R3. 76 Keysight N5990A-155 Display Port User Guide

77 Connection Diagrams 4 Connection setup for Aggressor Amplitude Calibration Following figure shows the connection setup for Aggressor Amplitude Calibration using JBERT M8020A configuration: Figure 50 Connection setup for JBERT M8020A Aggressor Amplitude Calibration (with ISI Box) Keysight N5990A-155 Display Port User Guide 77

78 4 Connection Diagrams Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 to the lane under test of the DisplayPort Plug fixture. Connect the JBERTTRIG output to the 3-way power dividers via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect one of the aggressor lanes (any lane other than the lane under test) from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output CLK of the J-BERT. Connect a 50 Ω termination to the negative clock output. Connect 50 Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture. 78 Keysight N5990A-155 Display Port User Guide

79 Connection Diagrams 4 Sink Tests Sink tests are performed for Lane 0, Lane 1, Lane 2 and Lane 3. Connection Setup for Sink Test Lane 0 Sink Test Lane 0 are performed for Jitter Tolerance Tests, Zero-Length Tests and Expert Mode Tests, whose connection setups are as following: Jitter Tolerance Test and Expert Mode Tests: Following figure shows the connection setup of Jitter Tolerance Test for Lane 0 using the JBERT M8020A configuration: Figure 51 Connection setup using JBERT M8020A 0f Jitter Tolerance Test for Lane 0 Keysight N5990A-155 Display Port User Guide 79

80 4 Connection Diagrams Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs (if the Artek box was not selected, use your own ISI Adjustment). Connect the Artek CLE1000-A2 to the lane under test of the DisplayPort Plug fixture. Connect the JBERTTRIG output to the 3-way power dividers via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. Connection setup for Lane1, Lane 2 and Lane 3 Same as Connection Setup for Sink Test Lane 0 on page 79, with only difference that for Lane 1 connect 60ps TTCs with R1 for Lane 2 connect 60ps TTCs with R2 for Lane 3 connect 60ps TTCs with R3 80 Keysight N5990A-155 Display Port User Guide

81 Connection Diagrams 4 3 Zero-Length Tests: Following figure shows the connection setup of Zero-Length tests for Lane 0 using the JBERT M8020A configuration: Figure 52 Connection setup using JBERT M8020A for Zero Length Tests for Lane 0 Keysight N5990A-155 Display Port User Guide 81

82 4 Connection Diagrams Instructions: Connect the JBERT data output to the lane under test of the DisplayPort Plug fixture via blocking capacitors and 60 ps TTCs. Connect the JBERTTRIG output to the 3-way power dividers via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the aggressor lanes of the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. 82 Keysight N5990A-155 Display Port User Guide

83 Connection Diagrams 4 JBERT N4903B and Switch Configuration Following figure shows the subgroups of Calibration and Tests using JBERT N4903B and Switch Configuration: Figure 53 List of Calibration procedures and various Tests using JBERT N4903B and Switch Configuration Keysight N5990A-155 Display Port User Guide 83

84 4 Connection Diagrams Calibrations Calibration is performed for Lane 0, Lane 1, Lane 2, Lane 3 and Aggressor Amplitude Calibration RBR/Aggressor Amplitude Calibration HBR/Aggressor Amplitude Calibration HBR2. Connection Setup for Lane 0 and Aggressor Amplitude Calibration RBR/HBR/HBR2 Following figure shows the connection setup for calibrations using the JBERT N4903B and switch configuration: Figure 54 Connection setup using JBERT N4903B and Switch Calibrations for Lane 0 and Aggressor Amplitude Calibration RBR/HBR/HBR2 84 Keysight N5990A-155 Display Port User Guide

85 Connection Diagrams 4 Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs. Connect the Artek CLE1000-A2 to the switch according to the detailed switch connections (see Switch Connections on page 97) Connect the JBERTTRIGGER/REF CLK output to the 3-way power dividers (4-way if you selected them in the Product Configuration) via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the switch according to the detailed switch connections. Connect the switch outputs to the DisplayPort Plug fixture. Connect the lane under test from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output CLK of the J-BERT. Connect a 50 Ω termination to the negative clock output. Connect 50 Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture. NOTE When the Switch is used the connection setup is the same for all lanes. Keysight N5990A-155 Display Port User Guide 85

86 4 Connection Diagrams Jitter Tolerance Tests and Expert Mode Tests Jitter Tolerance Tests and Expert Mode Tests are performed for Sink Test Lane 0, Sink Test Lane 1, Sink Test Lane 2 and Sink Test Lane 3. Connection Setup of Jitter Tolerance Test and Expert Mode Tests for Sink Test Lane 0 Following figure shows the connection setup for Sink tests Lane 0 using the JBERT N4903B and switch configuration: Figure 55 Connection setup using JBERT N4903B and Switch of Jitter Tolerance Test and Expert Mode Tests for Sink Test Lane 0 86 Keysight N5990A-155 Display Port User Guide

87 Connection Diagrams 4 Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs. Connect the Artek CLE1000-A2 to the switch according to the detailed switch connections in (see Switch Connections on page 97). Connect the JBERTTRIGGER/REF CLK output to the 3-way power dividers (4-way if you selected them in the Product Configuration) via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the switch according to the detailed switch connections. Connect the switch outputs to the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. NOTE When the Switch is used the connection setup is the same for all lanes. Keysight N5990A-155 Display Port User Guide 87

88 4 Connection Diagrams Zero-Length Tests Zero-Length Tests are performed for Sink Test Lane 0, Sink Test Lane 1, Sink Test Lane 2 and Sink Test Lane 3. Connection setup of Zero-Length Tests for Sink Test Lane 0 Following figure shows the connection setup for Zero-Length tests using the JBERT N4903B and switch configuration: Figure 56 Connection setup using JBERT N4903B and Switch of Zero-Length Test for Sink Test Lane 0 88 Keysight N5990A-155 Display Port User Guide

89 Connection Diagrams 4 Instructions: Connect the JBERT data output to the switch, according to the detailed switch connections (see Switch Connections on page 97), via blocking capacitors and 60 ps TTCs. Connect the JBERTTRIGGER/REF CLK output to the 3-way power dividers (4-way if you selected them in the Product Configuration) via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the switch according to the detailed switch connections. Connect the switch outputs to the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. NOTE When the Switch is used the connection setup is the same for all lanes. Keysight N5990A-155 Display Port User Guide 89

90 4 Connection Diagrams JBERT M8020A and Switch Configuration Following figure shows the subgroups of Calibration and Tests using JBERT M8020A and Switch Configuration: Figure 57 List of Calibration procedures and various Tests using JBERT M8020A and Switch Configuration 90 Keysight N5990A-155 Display Port User Guide

91 Connection Diagrams 4 Calibrations Calibration is performed for Lane 0, Lane 1, Lane 2, Lane 3 and Aggressor Amplitude Calibration RBR/Aggressor Amplitude Calibration HBR/Aggressor Amplitude Calibration HBR2. Connection Setup for Lane 0 and Aggressor Amplitude Calibration RBR/HBR/HBR2 Following figure shows the connection setup for calibrations using the JBERT M8020A and switch configuration: Figure 58 Connection setup using JBERT M8020A and Switch for Lane 0 and Aggressor Amplitude Calibration RBR/HBR/HBR2 Keysight N5990A-155 Display Port User Guide 91

92 4 Connection Diagrams Instruction: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs. Connect the Artek CLE1000-A2 to the switch according to the detailed switch connections (see Switch Connections on page 97). Connect the JBERTTRIG output to the 3-way power dividers via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the switch according to the switch connections in detail. Connect the switch outputs to the DisplayPort Plug fixture. Connect the lane under test from the DisplayPort Receptacle fixture to the oscilloscope according to the selected way: with Differential Probe (connected to CH1) or directly with SMA connections (connected to CH1 and CH3). Connect CH4 of the oscilloscope to the clock output CLK of the J-BERT. Connect a 50 Ω termination to the negative clock output. Connect 50 Ω terminations to the aggressor lanes of the DisplayPort Receptacle fixture NOTE When the Switch is used the connection setup is the same for all lanes. 92 Keysight N5990A-155 Display Port User Guide

93 Connection Diagrams 4 Jitter Tolerance Tests and Expert Mode Tests Jitter Tolerance Tests and Expert Mode Tests are performed for Sink Test Lane 0, Sink Test Lane 1, Sink Test Lane 2 and Sink Test Lane 3. Connection Setup of Jitter Tolerance Test and Expert Mode Tests for Sink Test Lane 0 Following figure shows the connection setup for Sink tests Lane 0 using the JBERT M8020A and switch configuration: Figure 59 Connection setup using JBERT M8020A and Switch of Jitter Tolerance Test and Expert Mode Tests for Sink Test Lane 0 Keysight N5990A-155 Display Port User Guide 93

94 4 Connection Diagrams Instructions: Connect the JBERT data output to the Artek CLE1000-A2 via blocking capacitors and 60 ps TTCs Connect the Artek CLE1000-A2 to the switch according to the detailed switch connections (see Switch Connections on page 97) Connect the JBERTTRIG output to the 3-way power dividers via blocking capacitors and 150 ps TTCs Connect the power divider outputs to the switch according to the detailed switch connections Connect the switch outputs to the DisplayPort Plug fixture Connect the AUX Controller to the DisplayPort Plug fixture Connect the DisplayPort Plug fixture to the DUT NOTE When the Switch is used the connection setup is the same for all lanes. 94 Keysight N5990A-155 Display Port User Guide

95 Connection Diagrams 4 Zero-Length Tests Zero-Length Tests are performed for Sink Test Lane 0, Sink Test Lane 1, Sink Test Lane 2 and Sink Test Lane 3. Connection setup of Zero-Length Tests for Sink Test Lane 0 Following figure shows the connection setup of Zero-Length tests for Lane 0 using the JBERT M8020A and switch configuration: Figure 60 Connection setup using JBERT M8020A and Switch Zero-Length Test of Zero-Length Tests for Sink Test Lane 0 Keysight N5990A-155 Display Port User Guide 95

96 4 Connection Diagrams Instructions: Connect the JBERT data output to the switch, according to the detailed switch connections (see Switch Connections on page 97), via blocking capacitors and 60 ps TTCs. Connect the JBERTTRIG output to the 3-way power dividers via blocking capacitors and 150 ps TTCs. Connect the power divider outputs to the switch according to the detailed switch connections. Connect the switch outputs to the DisplayPort Plug fixture. Connect the AUX Controller to the DisplayPort Plug fixture. Connect the DisplayPort Plug fixture to the DUT. NOTE When the Switch is used the connection setup is the same for all lanes. 96 Keysight N5990A-155 Display Port User Guide

97 Connection Diagrams 4 Switch Connections When the switch is used, the connection setup is shown in two images. The first image illustrates the complete setup, and the switch is represented as a gray box (see Figure 55 to Figure 60). A click at the button Show Switch Connection will change to the second image. This one shows just the switch matrix with its input and output connections in detail (Figure 61). Pressing the button Show General Connections will return to the entire-setup. Figure 61 Connection Diagram for Switch Connections Detail of Switch Connections To complete the switch setup, connect the following: Table 8 Switch Connections Parameter name Parameter Description Signal Generator Data Out --> Switch Modul 1, SMA connector Data In Signal Generator Data Out --> Switch Modul 2, SMA connector Data In aggressor 4way power divider 1.1 aggressor 4way power divider > Switch Modul 4, SMA connector > Switch Modul 4, SMA connector 2.2 Keysight N5990A-155 Display Port User Guide 97

98 4 Connection Diagrams Parameter name aggressor 4way power divider 1.3 aggressor 4way power divider 1.4 aggressor 4way power divider 2.1 aggressor 4way power divider 2.2 aggressor 4way power divider 2.3 aggressor 4way power divider 2.4 Parameter Description --> Switch Modul 5, SMA connector > Switch Modul 5, SMA connector > Switch Modul 4, SMA connector > Switch Modul 4, SMA connector > Switch Modul 5, SMA connector > Switch Modul 5, SMA connector 4.2 Switch module 1, SMA connector 1.1 Switch module 1, SMA connector 1.2 Switch module 1, SMA connector 1.3 Switch module 1, SMA connector 1.4 Switch module 2, SMA connector 1.1 Switch module 2, SMA connector 1.2 Switch module 2, SMA connector 1.3 Switch module 2, SMA connector > Switch Modul 4, SMA connector > Switch Modul 4, SMA connector > Switch Modul 5, SMA connector > Switch Modul 5, SMA connector > Switch Modul 4, SMA connector > Switch Modul 4, SMA connector > Switch Modul 5, SMA connector > Switch Modul 5, SMA connector 4.1 Switch Modul 4, SMA connector 1.c Switch Modul 4, SMA connector 3.c --> Fixture Lane0_P --> Fixture Lane0_N 98 Keysight N5990A-155 Display Port User Guide

99 Connection Diagrams 4 Parameter name Switch Modul 4, SMA connector 2.c Switch Modul 4, SMA connector 4.c Switch Modul 5, SMA connector 1.c Switch Modul 5, SMA connector 3.c Switch Modul 5, SMA connector 2.c Switch Modul 5, SMA connector 4.c Parameter Description --> Fixture Lane1_P --> Fixture Lane1_N --> Fixture Lane2_P --> Fixture Lane2_N --> Fixture Lane3_P --> Fixture Lane3_N NOTE The names of the lanes at the fixture depend on the fixture type. Possible switch module types Either switch modules SP4T or SP6T can be used for module 1 and module 2. For modules 4 and 5, switch module types 4xSPDT or 6xSPDT can be used. Mixing of module types is possible. Keysight N5990A-155 Display Port User Guide 99

100

101 Keysight N5990A-155 Display Port User Guide 5 Sink Calibration Procedures Calibration Overview / 102 DisplayPort Sink Calibrations / 105

102 5 Sink Calibration Procedures Calibration Overview Before any sink test procedure can be run, the DisplayPort sink test system must be calibrated. The ValiFrame calibration plane is given by the DUT input ports. The sink test signal characteristics such as the signal generator output voltage level and jitter parameters are typically affected by the signal transmission between the generator output ports and the DUT input ports. Thus, for any signal output parameter selected by the user (set value), the jitter and the signal received at the DUT input ports (actual value) deviate from the set value. Additional deviations can be caused by effects such as offset errors, hysteresis, and nonlinear behavior of the signal generator. The ValiFrame calibration procedures compensate the deviations of the relevant signal output parameter actual values from the set values over the required parameter range. All calibration procedures required for DisplayPort sink testing are included in the ValiFrame software. The ValiFrame calibration procedures are implemented such that the calibration process is conducted as fast as possible and is automated as much as possible, for example, by minimizing the number of reconfigurations of the hardware connections. Depending on the DUT configuration, more or fewer calibrations will need to be conducted. Table 9 presents a description of the procedure parameters used in the different calibrations. Table 9 Sink Calibration Parameters Parameter name Parameter Description Calibration Oscilloscope Bandwidth Acquisition Time Measured ISI with histogram Memory Depth Bandwidth of the oscilloscope in use The acquisition time for each captured data signal. Decreasing this value might speed up the calibration but reduces accuracy Uses histogram instead of EzJit+ oscilloscope software for ISI measurement Number of acquired points used by the scope to measure jitter 102 Keysight N5990A-155 Display Port User Guide

103 Sink Calibration Procedures 5 Parameter name Measurement Cycles Skip Delay Auto Calibration Parameter Description Number of averaged measurements for each calibration step. Decreasing this value might speed up the calibration but reduces accuracy Set to true to skip delay auto calibration of ParBERT Jitter Use Explicit Clock ISI Amplitude First Variable ISI Value Stop Jitter Jitter Step Count SJ Frequency Jitter is measured with explicit clock, otherwise, with Constant Clock ISI amplitude applied First Variable ISI value set to the Artek CLE1000-A2 The maximum calibrated random jitter (RJ) amplitude The number of jitter calibrated steps Sinusoidal jitter (SJ) frequency used to apply the jitter values Pattern Sequence File Aggressor Clock Divider Pattern Period Length Pattern Period Length Auto Detect Specifies the name of the sequence file that should be used The clock divider for the aggressor lane pattern Period length of the pattern; this information is required for jitter measurements. It should be changed only when using a custom pattern. Automatically determined period length of the pattern Phase-Locked Loop (PLL) Loop Bandwidth PLL Loop Bandwidth. The default value is scaled to 62.6% of the specified value, to compensate for a slightly different PLL implementation in the oscilloscope Damping Factor PLL Damping Factor (Zeta) Vol tages Differential Voltage Amplitude value of the generator output Keysight N5990A-155 Display Port User Guide 103

104 5 Sink Calibration Procedures Parameter name First Differential Voltage Minimum Eye Opening Applied Voltage Step Parameter Description First amplitude value of the output generator Lowest calibrated eye opening voltage Differential voltage step size for the calibration. At every step, the output voltage is decreased by this value 104 Keysight N5990A-155 Display Port User Guide

105 Sink Calibration Procedures 5 DisplayPort Sink Calibrations This section contains the set of calibrations required for the DP Sink test procedures. Calibrations are organized in groups depending on the data rate: RBR (Reduced Bit Rate) HBR (High Bit Rate) HBR2 HBR3 Keysight N5990A-155 Display Port User Guide 105

106 5 Sink Calibration Procedures Intersymbol Interference (ISI) Calibration Purpose Procedure Connection Diagram This procedure is used to calibrate the ISI. There is a separate calibration for each supported data rate. For this purpose, either the EzJit+ application or the Histogram on the real-time scope can be used. All jitter components are disabled and the pattern is set according to the data bit rate. For RBR or HBR the pattern is PRBS7 and for HBR2 the pattern is CP2520 (compliance pattern). The ISI is measured and averaged over a number of cycles. If the ISI value is within the ±7.5% (for RBR 2.3%) tolerance of the target value, the calibration will pass. If it is out of the mentioned range, the calibration will fail. The Artek CLE1000-A2 can be used as the ISI Channel for all the pattern generators. In that case, the ISI calibration starts by setting a variable ISI value (%) for the Artek CLE1000-A2 whose measured ISI value on the scope is lower than the target ISI. Afterwards, the variable ISI value is increased until the measured ISI is higher than the target value. If the Artek box is not used, the user has to adjust the ISI manually by some other method. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. Parameters The parameters used in expert mode for this calibration are: Calibration Oscilloscope Bandwidth Acquisition Time (for RBR) Measured ISI with histogram (for HBR and HBR2) Measured Depth (for HBR and HBR2) Measurement Cycles Jitter ISI Amplitude 106 Keysight N5990A-155 Display Port User Guide

107 Sink Calibration Procedures 5 Dependencies Results First Variable ISI Value Pattern Sequence File Aggressor Clock Divider Pattern Period Length Pattern Period Length Auto Detect PLL Loop Bandwidth Damping Factor Voltages Differential Voltage These parameters are listed in Table 9 on page 102. No calibration is required for this method. Two examples of HTML viewers for the ISI Calibration procedure are shown in Figure 62 and Figure 63. The results comprise: The common parameter list (in expert mode) A calibration data table for the ISI that is being calibrated (see Table 10) Figure 62 Example of HTML Viewer for ISI Calibration Keysight N5990A-155 Display Port User Guide 107

108 5 Sink Calibration Procedures Figure 63 Example of HTML Viewer for ISI Calibration (with ISI Box) 108 Keysight N5990A-155 Display Port User Guide

109 Sink Calibration Procedures 5 Table 10 Data Table for ISI Calibration (with ISI Box) Parameter name Result Measured ISI Set Variable ISI Value (%) Measured ISI Description Pass if the measured ISI is in range ±7.5% of the required value The averaged value of the ISI measurements The ISI value set in the Artek CLE1000-A2 The ISI value measured in the scope Keysight N5990A-155 Display Port User Guide 109

110 5 Sink Calibration Procedures Random Jitter Calibration Purpose Procedure Connection Diagram Parameters This calibration calibrates the random jitter (RJ). There is a separate calibration for each supported data rate. For this purpose the EzJit+ application running on the real-time scope is used. The test automation starts by applying small RJ amplitudes and increases them. For every set RJ value, the corresponding amplitude is measured. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Calibration Oscilloscope Bandwidth Measurement Cycles Jitter Use Explicit Clock ISI Amplitude Stop Jitter Jitter Step Count Pattern Sequence File Aggressor Clock Divider Pattern Period Length Pattern Period Length Auto Detect Voltages Differential Voltage These parameters are listed in Table Keysight N5990A-155 Display Port User Guide

111 Sink Calibration Procedures 5 Dependencies Results The calibration required for this method is: ISI Calibration An example HTML viewer for the Random Jitter Calibration procedure is shown in Figure 64. The results comprise: A calibration data graph The common parameter list (in expert mode) A calibration data table for the Random Jitter that is being calibrated (see Table 11) Keysight N5990A-155 Display Port User Guide 111

112 5 Sink Calibration Procedures Figure 64 Example HTML Viewer for Random Jitter Calibration 112 Keysight N5990A-155 Display Port User Guide

113 Sink Calibration Procedures 5 Table 11 Data Table for Random Jitter Calibration Parameter name Set Jitter Measured Jitter Description The applied random jitter value. The measured random jitter value Keysight N5990A-155 Display Port User Guide 113

114 5 Sink Calibration Procedures High Speed Sinusoidal Jitter Calibration Purpose Procedure Connection Diagram Parameters This procedure is used to calibrate the sinusoidal jitter injected through the delay line of the ParBERT. There is a separate calibration for each supported data rate. Different values of jitter amplitude are applied and measured at the real-time scope using the EzJit+ application. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Calibration Oscilloscope Bandwidth Measurement Cycles Jitter Use Explicit Clock ISI Amplitude Stop Jitter Jitter Step Count Pattern Sequence File Aggressor Clock Divider Pattern Period Length Pattern Period Length Auto Detect Voltages Differential Voltage These parameters are listed in Table Keysight N5990A-155 Display Port User Guide

115 Sink Calibration Procedures 5 Dependencies Results The calibration required for this method is: ISI Calibration An example HTML viewer for the High Speed Sinusoidal Jitter Calibration procedure is shown in Figure 65. The results comprise: A calibration data graph The common parameter list (in expert mode) A calibration data table for the Sinusoidal Jitter that is being calibrated (see Table 12) Keysight N5990A-155 Display Port User Guide 115

116 5 Sink Calibration Procedures Figure 65 Example HTML Viewer for High Speed Sinusoidal Jitter Calibration 116 Keysight N5990A-155 Display Port User Guide

117 Sink Calibration Procedures 5 Table 12 Data Table for High Speed Sinusoidal Jitter Calibration Parameter name Set Jitter Measured Jitter Description The value of jitter set at the jitter generator instrument The measured jitter amplitude Keysight N5990A-155 Display Port User Guide 117

118 5 Sink Calibration Procedures Fixed Sinusoidal Jitter Calibration Purpose Procedure Connection Diagram Parameters This calibration calibrates the fixed sinusoidal jitter (SJFIXED), which consists of sinusoidal jitter of 200 MHz frequency. Only HBR2 contains a jitter component of 200 MHz, which is why this calibration is available only for this data rate. For this purpose the EzJit+ application running on the real-time scope is used. The test automation starts with small SJ amplitudes and increases and measures them for each set amplitude. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Calibration Oscilloscope Bandwidth Measurement Cycles Jitter Use Explicit Clock ISI Amplitude Stop Jitter Jitter Step Count Pattern Sequence File Aggressor Clock Divider Pattern Period Length Pattern Period Length Auto Detect Voltages Differential Voltage These parameters are listed in Table Keysight N5990A-155 Display Port User Guide

119 Sink Calibration Procedures 5 Dependencies Results The calibration required for this method is: ISI Calibration An example HTML viewer for the Fixed Sinusoidal Jitter Calibration procedure is shown in Figure 66. The results comprise: A calibration data graph The common parameter list (in expert mode) A calibration data table for the Sinusoidal Jitter that is being calibrated (see Table 13) Keysight N5990A-155 Display Port User Guide 119

120 5 Sink Calibration Procedures Figure 66 Example HTML Viewer for Fixed Sinusoidal Jitter Calibration 120 Keysight N5990A-155 Display Port User Guide

121 Sink Calibration Procedures 5 Table 13 Data Table for Fixed Sinusoidal Jitter Calibration Parameter name Set Sinusoidal Jitter Measured Jitter Description The applied sinusoidal jitter amplitude fixed at 200MHz. Measured fixed jitter amplitude Keysight N5990A-155 Display Port User Guide 121

122 5 Sink Calibration Procedures Eye Opening Calibration Purpose Procedure Connection Diagram Parameters This calibration calibrates the eye opening after the ISI emulator. There is a separate calibration for each supported data rate. All the jitter impairments (RJ, ISI, SSC, SJFIXED, and SJSWEEP) are applied to the data signal. Aggressor signals are not considered for this calibration. The scope is configured to show the real-time eye. For RBR and HBR, the test automation detects the crossing points of the eye by using a histogram measurement and calculates the 50% crossing point (middle of the eye). At this location two histogram measurements are used to measure the eye opening. For HBR2, the test automation uses the location between 37.5% and 62.5% of the horizontal UI, where the eye opening is maximum, for the measurement. After that, the generator output voltage is decreased and the same measurement is repeated. This allows an amplitude range to be calibrated. The eye opening is measured and averaged over a number of cycles. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Calibration Oscilloscope Bandwidth Memory Depth Measurement Cycles Jitter ISI Amplitude RJ Amplitude (RMS) SJ Frequency Pattern Sequence File 122 Keysight N5990A-155 Display Port User Guide

123 Sink Calibration Procedures 5 Dependencies Results Aggressor Clock Divider PLL Loop Bandwidth Damping Factor Voltages First Differential Voltage Minimum Eye Opening Applied Voltage Step These parameters are listed in Table 9. The calibrations required for this method are: ISI Calibration RJ Jitter Calibration High Speed Sinusoidal Jitter Calibration Fixed Sinusoidal Jitter Calibration An example HTML viewer for the Eye Opening Calibration procedure is shown in Figure 67. The results comprise: A calibration data graph The common parameter list (in expert mode) A calibration data table for the Eye that is being calibrated (see Table 14) Keysight N5990A-155 Display Port User Guide 123

124 5 Sink Calibration Procedures Figure 67 Example HTML Viewer for Eye Opening Calibration 124 Keysight N5990A-155 Display Port User Guide

125 Sink Calibration Procedures 5 Table 14 Data Table for Eye Opening Calibration Parameter name Set Voltage Measured Eye Opening Description The generator set output voltage Measured eye opening with the scope Keysight N5990A-155 Display Port User Guide 125

126 5 Sink Calibration Procedures Aggressor Amplitude Calibration Purpose Procedure Connection Diagram Parameters Dependencies This calibration calibrates the differential output voltage of the aggressor signal. There is a separate calibration for each supported data rate. The test automation starts by applying a high differential voltage and decreases it in each step. The corresponding aggressor signal amplitude is measured on the scope. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Calibration Oscilloscope Bandwidth Memory Depth Measurement Cycles Pattern Sequence File Aggressor Clock Divider PLL Loop Bandwidth Damping Factor Voltages First Differential Voltage Minimum Eye Opening Applied Voltage Step These parameters are listed in Table 9. No calibrations are required for this method. 126 Keysight N5990A-155 Display Port User Guide

127 Sink Calibration Procedures 5 Results An example HTML viewer for the Aggressor Amplitude Calibration procedure is shown in Figure 68. The results comprise: A calibration data graph The common parameter list (in expert mode) A calibration data table for the Aggressor Amplitude that is being calibrated (see Table 15) Keysight N5990A-155 Display Port User Guide 127

128 5 Sink Calibration Procedures Figure 68 Example HTML Viewer for Aggressor Amplitude Calibration 128 Keysight N5990A-155 Display Port User Guide

129 Sink Calibration Procedures 5 Table 15 Data Table for Aggressor Amplitude Calibration Parameter name Set Voltage Measured Voltage Description Set Clock Generator output voltage Measured aggressor signal voltage Keysight N5990A-155 Display Port User Guide 129

130 5 Sink Calibration Procedures Data Skew Calibration Purpose Procedure Connection Diagram Parameters The data skew calibration is only available in expert mode when the ParBERT configuration is used. This calibration does not depend on the data rate. This procedure, first, runs the internal delay auto calibration of the ParBERT clock groups and, afterward, measures the cable skews between the different generators of the multi-generator clock group. Refer to the connection setup from Chapter 4, Connection Diagrams in the ParBERT 7G Configuration on page 40. The parameters used in expert mode for this calibration are: Calibration Oscilloscope Bandwidth Skip Delay Auto Calibration Pattern Sequence File These parameters are listed in Table 9. Dependencies Results No calibrations are required for this method. An example HTML viewer for the Generator Single-Ended Swing Calibration procedure is shown in Figure 69. The results comprise: The common parameter list (in expert mode) A calibration data table for the Data Skew that is being calibrated (see Table 16) 130 Keysight N5990A-155 Display Port User Guide

131 Sink Calibration Procedures 5 Figure 69 Example HTML Viewer for Data Skew Calibration Table 16 Data Table for Data Skew Calibration Parameter name Result Module Skew Value Description Pass/Fail, according to whether the ParBERT was able to measure the delay Shows the name of the clock generator module that was calibrated Skew value measured by the ParBERT Keysight N5990A-155 Display Port User Guide 131

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133 Keysight N5990A-155 Display Port User Guide 6 Sink Test Procedures DisplayPort Sink Tests / 137

134 6 Sink Test Procedures For Sink Tests Procedures the basic approach is always the same: Achieve frequency lock Achieve symbol lock Configure the DUT for error counting Verify the error counting Run the BER test Before starting the Sink tests, it is recommended that you press the button Query DUT Capabilities in the Advanced Product Configuration. Then the AUX Controller will communicate with the DUT, and the DUT capabilities will be displayed. This ensures before you start running the tests, that the AUX Controller is able to communicate with the DP-controller inside the DUT. Table 17 presents a description of the procedure parameters used in the different Sink Rx tests. Table 17 Sink Rx Tests Parameters Parameter name Parameter Description Bit Error Rate Testing Link Quality Pattern Hint Observation Time Allowed Number of Errors Represents the link quality pattern that is written to the DPCD register according to the spec. Make sure that this value is in sync with the Sequence File property. The time in seconds during which the PRBS pattern is sent out. Maximum allowed number of errors in order to pass the test. Intra-Pair Skew SJ Frequency SJ Amplitude Sinusoidal jitter frequency injected during the test Sinusoidal jitter amplitude injected during the test. Bit rate Maximum Frequency Deviation Deviation Step Size The maximum data rate deviation used for the test. Step size applied to the data rate DPCD Extra DPCD Extra DPCD Order Additional data written to the DPCD registers (format: <register>=<value>, where <register> and <value> are hexadecimal, e.g., 0909=01, 090A=FF ) Defines at which point the extra DPCD (if any) is written to the DPCD registers. 134 Keysight N5990A-155 Display Port User Guide

135 Sink Test Procedures 6 Parameter name Parameter Description Jitter ISI Amplitude RJ Amplitude (RMS) Fixed SJ Amplitude(pk-pk Fixed SJ Frequency ISI amplitude applied during the test. The RJ amplitude injected during the test. Fixed peak peak SJ Amplitude injected during the test. Fixed SJ Frequency used for the test. It is read-only. Pattern Sequence File Aggressor Clock Divider The name of the sequence file that is used for testing. Make sure this property is in sync with the Link Quality Pattern Hint. The clock divider for the aggressor lane pattern. SSC (Spread Spectrum Clocking) SSC Frequency SSC Amplitude Use SSC The frequency of the SSC modulation. The amplitude of the SSC modulation. SSC is applied for testing with the specified frequency and amplitude. Swept SJ Amplitude Swept SJ Amplitude Step Size Minimum Swept SJ Amplitude Maximum Swept SJ amplitude Use Binary Search If you are running the test in binary search mode, this is the precision for the binary search mode to stop, if not, this is the step size of the jitter amplitude Starting value of the SJ for each frequency. Maximum SJ amplitude that is tested provided the device does not fail earlier and the instrument can generate this amplitude Search in binary search mode to find the failing amplitude point for each SJ frequency or use linear steps Swept SJ Frequency Start Frequency Stop Frequency Number of Frequency Steps Use Linear Frequency Steps Use Frequency Points The lowest SJ frequency that should be tested. The highest SJ frequency that should be tested. The number of different frequencies that should be tested in the specified range. Set to true to use linear frequency steps or false to use logarithmic steps. Use frequency points instead of the list generated by the start and stop values. Keysight N5990A-155 Display Port User Guide 135

136 6 Sink Test Procedures Parameter name Frequency Points Parameter Description Frequency values to use if the previous option is selected. Vol tages Tested Lane Voltage Aggressor Lane Voltage Start Differential Amplitude Differential Amplitude Step Size Use Eye Opening Calibration Calibrated eye opening used during the test. Calibrated aggressor signal differential voltage used during the test. First amplitude value of the output generator. Differential voltage step size for the test. At every step, the output voltage is decreased by this value The amplitude is set according to the eye height calibration table. 136 Keysight N5990A-155 Display Port User Guide

137 Sink Test Procedures 6 DisplayPort Sink Tests The Sink tests for DisplayPort are implemented according to the DisplayPort 1.2b CTS in the section Sink Compliance Test. The Sink test groups are divided by lane (1 4) and subdivided by supported data rate (RBR, HBR, and HBR2) and SJ Frequency (2, 10, 20 and 100 MHz). There are three types of tests: Jitter Tolerance Test Zero-Length Test Expert Mode Test Jitter Tolerance Test Purpose Procedure Connection Diagram Parameters This test procedure is described in the DisplayPort 1.2b compliance test specification. It generates a stressed eye and verifies that the receiver sustains a BER of 10e 9. The test automation sets up the instrument with the calibrated amplitudes and jitter values required by the specification. First, it runs the link training, which is done in two steps: frequency and symbol lock phase. Afterward, the data pattern is applied (PRBS7 for RBR and HBR or CP2520 for HBR2) and the error counter started. A count-down timer is displayed and, when it is finished, the result of the test will be decided depending on the number of errors. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Bit Error Rate Testing Link Quality Pattern Hint Allowed Number of Errors Observation Time Keysight N5990A-155 Display Port User Guide 137

138 6 Sink Test Procedures Dependencies Results DPCD Extra DPCD Extra DPCD Order Jitter ISI Amplitude RJ Amplitude (RMS) Fixed SJ Amplitude (pk-pk) Fixed SJ Frequency Pattern Sequence File Aggressor Clock Divider SSC Use SSC SSC Frequency SSC Amplitude Voltage Levels Tested lane voltage Aggressor Lane Voltage These parameters are listed in Table 17. The calibrations required for this method are: ISI Calibration RJ Jitter Calibration High Speed Sinusoidal Jitter Calibration Fixed Sinusoidal Jitter Calibration Eye Opening Calibration Aggressor Amplitude Calibration An example HTML viewer for the Jitter Tolerance Test procedure is shown in Figure 70. The results comprise: The common parameter list (in expert mode) A data table for the Result (see Table 18) 138 Keysight N5990A-155 Display Port User Guide

139 Sink Test Procedures 6 Figure 70 Example HTML Viewer for Jitter Tolerance Test Table 18 Data Table for Jitter Tolerance Test Parameter name Result Jitter Frequency Sinusoidal Jitter Amplitude Number of Errors Min Spec Max Spec Details Description Pass/Fail, pass means this test succeeded The frequency of the sinusoidal jitter injected during the test The amplitude of the sinusoidal jitter injected during the test The number of errors counted during the test The minimum allowed number of errors The maximum allowed number of errors Description of the possible problems found during the test Keysight N5990A-155 Display Port User Guide 139

140 6 Sink Test Procedures Jitter Tolerance Test Zero-Length Cable Purpose Procedure Connection Diagram Parameters This test procedure is described in the DisplayPort 1.2b compliance test specification. It generates a stressed eye and verifies that the receiver sustains a BER of 10e 9. This test follows the same procedure as explained in the Jitter Tolerance Test (Jitter Tolerance Test on page 137) but without ISI channel and only for the data rates HBR and HBR2. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Bit Error Rate Testing Link Quality Pattern Hint Allowed Number of Errors Observation Time DPCD Extra DPCD Extra DPCD Order Jitter ISI Amplitude RJ Amplitude (RMS) Fixed SJ Amplitude (pk-pk) Fixed SJ Frequency Pattern Sequence File Aggressor Clock Divider SSC Use SSC SSC Frequency SSC Amplitude 140 Keysight N5990A-155 Display Port User Guide

141 Sink Test Procedures 6 Dependencies Results Voltage Levels Tested lane voltage Aggressor Lane Voltage These parameters are listed in Table 17 The calibrations required for this method are: ISI Calibration RJ Jitter Calibration High Speed Sinusoidal Jitter Calibration Fixed Sinusoidal Jitter Calibration Eye Opening Calibration Aggressor Amplitude Calibration An example HTML viewer for the Jitter Tolerance Test procedure is shown in Figure 71. The results comprise: The common parameter list (in expert mode) A data table for the Result (see Table 19) Keysight N5990A-155 Display Port User Guide 141

142 6 Sink Test Procedures Figure 71 Example HTML Viewer for Jitter Tolerance Test (Zero-Length) Table 19 Data Table for Jitter Tolerance Test (Zero-Length) Parameter name Result Jitter Frequency Sinusoidal Jitter Amplitude Number of Errors Min Spec Max Spec Details Description Pass/Fail, pass means this test succeeded The frequency of the sinusoidal jitter injected during the test The amplitude of the sinusoidal jitter injected during the test The number of errors counted during the test The minimum allowed number of errors The maximum allowed number of errors Description of the possible problems found during the test 142 Keysight N5990A-155 Display Port User Guide

143 Sink Test Procedures 6 Jitter Tolerance Characterization Test Purpose Procedure Connection Diagram Parameters This procedure tests the jitter tolerance of a device for different sinusoidal jitter frequencies. It is only available after configuring the product in Expert Mode. For each sinusoidal jitter frequency, this procedure tries to find the jitter amplitude at which the target BER can be sustained. It starts by setting the maximum jitter amplitude. Then the value is decreased using either a binary or linear search algorithm. The range of jitter frequencies to be tested can be defined in the Swept SJ frequency parameters section. The result is a curve that shows the maximum jitter that the DUT can tolerate as a function of the SJ frequency. Because the limitations of the instruments and the setup have influence on the result (e.g. if the DUT would tolerate higher jitter amplitudes than the generator could apply), the maximum possible (or applied) jitter is also reported. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Bit Error Rate Testing Link Quality Pattern Hint Allowed Number of Errors Observation Time DPCD Extra DPCD Extra DPCD Order Jitter ISI Amplitude RJ Amplitude (RMS) Pattern Sequence File Keysight N5990A-155 Display Port User Guide 143

144 6 Sink Test Procedures Dependencies Results Aggressor Clock Dividers SSC SSC Frequency SSC Amplitude Use SSC Swept SJ Amplitude Swept SJ Amplitude Step Minimum Swept SJ Amplitude Maximum Swept SJ Amplitude Use Binary Search Swept SJ Frequency Start Frequency Stop Frequency Number of Frequency Steps User Linear Frequency Steps User Frequency Points Frequency Points Voltage Levels Tested lane voltage Aggressor Lane Voltage These parameters are listed in Table 17. The calibrations required for this method are: ISI Calibration RJ Jitter Calibration Fixed Sinusoidal Jitter Calibration Eye Opening Calibration Aggressor Amplitude Calibration An example HTML viewer for the Jitter Characterization Test procedure is shown in Figure 72. The results comprise: A test data graph The common parameter list (in expert mode) A data table for the Result (see Table 20) 144 Keysight N5990A-155 Display Port User Guide

145 Sink Test Procedures 6 Figure 72 Example HTML Viewer for Jitter Characterization Test Keysight N5990A-155 Display Port User Guide 145

146 6 Sink Test Procedures Table 20 Data Table for Jitter Characterization Test Parameter name Result Sinusoidal Jitter Frequency Max Passed SJ Min Spec Jitter Capability Test Setup Max Applied S-Jitter Generator Limit Reached Description Pass/Fail, pass means this test succeeded Shows the frequency of the Sinusoidal Jitter used for this point Maximum SJ amplitude where the device passed the test Minimum SJ amplitude for this frequency specified in the CTS The maximum possible jitter of the instruments in the setup The maximum jitter that was applied to the DUT during the test Determines whether the test for this frequency was stopped owing to instrument limitation or to the device failing this amplitude 146 Keysight N5990A-155 Display Port User Guide

147 Sink Test Procedures 6 Data Rate Deviation Test Purpose Procedure Connection Diagram Parameters This test defines the data rate limits where the device can still work. This procedure adjusts the data rate until the target BER specified in DP1.2b CTS cannot be sustained by the DUT. First, it increases the original data rate value by a deviation step size (by default 1 ppm), until it reaches the maximum deviation value. Afterward, it repeats the same procedure but decreases the original data rate by the deviation step size. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Bit Error Rate Testing Link Quality Pattern Hint Allowed Number of Errors Observation Time Bitrate Maximum Frequency Deviation Deviation Step Size DPCD Extra DPCD Extra DPCD Order Pattern Sequence File Aggressor Clock Dividers SSC SSC Frequency SSC Amplitude Use SSC Voltage Levels Tested lane voltage Keysight N5990A-155 Display Port User Guide 147

148 6 Sink Test Procedures Aggressor Lane Voltage These parameters are listed in Table 17. Dependencies The calibration required for this method is: Eye Opening Calibration Results An example HTML Viewer for the Datarate Deviation Test is shown in Figure 73. The results comprise: The common parameter list (in expert mode) A data table for the Result (see Table 21) 148 Keysight N5990A-155 Display Port User Guide

149 Sink Test Procedures 6 Figure 73 Example HTML Viewer for Datarate Deviation Test Keysight N5990A-155 Display Port User Guide 149

150 6 Sink Test Procedures Table 21 Data Table for Data rate Deviation Test Parameter name Result Test Point Max passed Datarate Deviation Details Parameter Description Pass/Fail, pass means the deviation is within the spec limits Datarate with positive or negative deviation This is the maximum datarate deviation allowed to pass the test Detailed comments if the test fails 150 Keysight N5990A-155 Display Port User Guide

151 Sink Test Procedures 6 Intra-Pair Skew Test Purpose This procedure tests intra-pair skew tolerance of the device. Procedure Connection Diagram Parameters Dependencies This test increases the skew between normal and complement of the tested lane and tries to run the training sequence as well as sustain the specified BER. The skew is increased until the test fails or 1 UI skew is reached. After that, the skew is tested in the opposite direction. This procedure is an expert mode test and only for the ParBERT configuration. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Intra-Pair Skew SJ Frequency SJ Amplitude Bit Error Rate Testing Sequence File Link Quality Pattern Hint SSC SSC Frequency SSC Amplitude Use SSC These parameters are listed in Table 17. The calibration required for this method is: Data Skew Calibration Keysight N5990A-155 Display Port User Guide 151

152 6 Sink Test Procedures Results An example HTML Viewer for the Intra-Pair Skew Test procedure is shown in Figure 74. The results comprise: The common parameter list (in expert mode) A data table for the Result (see Table 22) Figure 74 Example HTML Viewer for Intra-Pair Skew Test 152 Keysight N5990A-155 Display Port User Guide

153 Sink Test Procedures 6 Table 22 Data Table for Intra-Pair Skew Test Parameter name Result Max Passed Skew Min Passed Skew Description Pass/Fail, pass means this test succeeded Maximum skew value at which the device passes the test Minimum skew value at which the device passes the test Keysight N5990A-155 Display Port User Guide 153

154 6 Sink Test Procedures Sensitivity Test Purpose This test characterizes that the DUT can still work with the minimum differential voltage. Procedure Connection Diagram Parameters The procedures starts at the maximum output voltage and does the Link Training. If the device passes, the generator output is decreased and tested again. This is repeated until the device fails because the bits are not detected properly anymore owing to the low voltage level applied. The table also shows the eye opening corresponding to the set amplitude. This value is taken from the Eye Height Calibration. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Bit Error Rate Testing Link Quality Pattern Hint Allowed Number of Errors Observation Time DPCD Extra DPCD Extra DPCD Order Pattern Sequence File Aggressor Clock Dividers SSC SSC Frequency SSC Amplitude Use SSC Voltage Levels Start Differential Amplitude Differential Amplitude Step Size 154 Keysight N5990A-155 Display Port User Guide

155 Sink Test Procedures 6 Use Eye Opening Calibration These parameters are listed in Table 17. Dependencies The calibration required for this method is: Eye Opening Calibration Results An example HTML Viewer for the Sensitivity Test procedure is shown in Figure 75. The results comprise: A test data graph The common parameter list (in expert mode) A data table for the Result (see Table 23) Keysight N5990A-155 Display Port User Guide 155

156 6 Sink Test Procedures Figure 75 Example HTML Viewer for Sensitivity Test 156 Keysight N5990A-155 Display Port User Guide

157 Sink Test Procedures 6 Table 23 Data Table for Sensitivity test Parameter name Result Generator Output Eye Opening Description Pass/Fail, pass means this test succeeded The applied generator output voltage The eye opening corresponding to the applied voltage Keysight N5990A-155 Display Port User Guide 157

158 6 Sink Test Procedures Variable Parameter Test Purpose Procedure Connection Diagram Parameters This test lets you select a wide variety of combinations for all relevant parameters, such as jitter frequencies and amplitudes as well as voltage levels, to test your device against. First, the combination of parameters can be selected in the Variable Parameter Test window (see Figure 76). Then the BER error test is executed by pressing the Test Sink and Add Entry button. The test can be performed as many times as desired with different selections of parameters. Finally, when the button Finish Test is pressed the results are saved in an Excel file. Refer to the connection setup from Chapter 4, Connection Diagrams depending on the configuration. The parameters used in expert mode for this calibration are: Bit Error Rate Testing Sequence File Link Quality Pattern Hint These parameters are listed in Table 17. Dependencies The calibrations required for this method are: ISI Calibration RJ Jitter Calibration High Speed Sinusoidal Jitter Calibration Fixed Sinusoidal Jitter Calibration Eye Opening Calibration Aggressor Amplitude Results An example HTML Viewer for the Variable Parameter Test procedure is shown in Figure 76. The results comprise: The common parameter list (in expert mode) 158 Keysight N5990A-155 Display Port User Guide

159 Sink Test Procedures 6 A data table for the Result (see Table 24) Figure 76 Example HTML Viewer for Variable Parameter Test Table 24 Data Table for Variable Parameters Test Parameter name Result Data Amplitude Aggressor Lanes Amplitude RJ Amplitude Bitrate 1st Jitter Comp. Amplitude Description Pass/Fail, pass means this test succeeded The generator output level The aggressor signal level The RMS amplitude of the random jitter The bit rate used during the test The amplitude of the first SJ component Keysight N5990A-155 Display Port User Guide 159

160 6 Sink Test Procedures Parameter name 1st Jitter Comp. Frequency 2nd Jitter Comp. Amplitude 2nd Jitter Comp. Frequency SSC Frequency SSC Amplitude Observation Time Error Counter Limit Error Counter Description The frequency of the first SJ component The amplitude of the second SJ component The frequency of the second SJ component The frequency of the SSC modulation The amplitude of the SSC modulation The observation time of the error counter The limit of the error counter The number of errors found after the observation time has elapsed 160 Keysight N5990A-155 Display Port User Guide

161 Keysight N5990A-155 Display Port User Guide 7 Source Test Procedures DisplayPort source compliance testing consists in measuring the DisplayPort signal generated by the DUT. The signal analysis is conducted by the Keysight (or Agilent) oscilloscope application. ValiFrame remote-controls the scope application and shows the connection setups as well as the result in a coalesced report. There are Physical and Link Layer tests. The Source PHY tests are divided into four groups depending on the used pattern (PRBS7, D10.2, HBR2CPAT, PLTPAT). See Figure 77.

162 7 Source Test Procedures Figure 77 Source Test List 162 Keysight N5990A-155 Display Port User Guide

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164 This information is subject to change without notice. Keysight Technologies 2017 Edition 1.0, April