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Teledyne LeCroy

DisplayPort Test Implementation Group 1 Teledyne LeCroy MOI Draft1

WaveMaster 8 Zi-A and SDA 8 Zi-A Series Oscilloscopes

DisplayPort™

Standard

April, 2016

Teledyne LeCroy MOI for DisplayPort PHY CTS 1.2b

Source Testing

This document is provided "AS IS" and without any warranty of any kind, including, without limitation, any

expressed or implied warranty of non-infringement, merchantability or fitness for a particular purpose.

In no event shall VESA™ or any member of VESA be liable for any direct, indirect, special, exemplary, punitive, or

consequential damages, including, without limitation, lost profits, even if advised of the possibility of such damages.

This material is provided for reference only. VESA does not endorse any vendor’s equipment, including equipment

outlined in this document.

Teledyne LeCroy



TABLE OF CONTENTS

MODIFICATION RECORD 3

REFERENCES 5

ACKNOWLEDGEMENTS 5

List of Figures 6

Source PHY Tests (CTS1.2b Section 3) 7 1. Introduction 7 2. Test Pre-test Procedures 7 3. PHY CTS 1.2b Source Testing Overview 7 3.1. EYE Diagram Testing 7 3.2. Non Pre-Emphasis Level Verification Testing 7 3.3. Pre-Emphasis Level Verification and Maximum Differential Pk-Pk Output Voltage 7 3.4. Inter-Pair Skew Test 7 3.11. Non ISI Jitter 7 3.12. Total Jitter (TJ) and Random Jitter (RJ/DJ) 7 3.14. Main Link Frequency 7 3.15. Spread Spectrum Modulation Frequency (if DUT supports SSC) 7 3.16. Spread Spectrum Modulation Deviation (if DUT supports SSC) 7 3.18. Dual-mode TMDS Clock (if DUT supports Dual-mode) 7 3.19. Dual-mode EYE Diagram (if DUT supports Dual-mode) 7 4. Test Objective 8 5. Test Conditions 8 6. Required Equipment for PHY CTS 1.2b Source Testing 9 6.1. LeCroy Oscilloscope (13 GHz or above for testing of all bit rates.) 10 6.2. Software Option Requirements 10 6.3. QualiPHY DP Automation SW 10 6.4. VESA Approved Test Fixtures 11 6.5. Unigraf DPR-100 12 7. DP Source Test Setup 12 8. Connecting to the DUT for testing (Referring to Figure 6) 13 9. Running the DisplayPort Compliance Tests 13 9.1. RBR/HBR/HBR2 Measurements 14 9.1.1. RBR/HBR/HBR2 Measurements if the DUT supports Automation 14 9.1.2. RBR/HBR/HBR2 Measurements without Automation 17 9.1.3. Running Compliance Testing with automation and a switch matrix 18 9.1.4. Viewing, Saving and Reporting RBR/HBR/HBR2 Compliance Test Results 20 9.1.4.1. Viewing RBR/HBR/HBR2 Compliance Test Results 20 9.2. Dual Mode Measurements (For DUTs that support Dual-Mode) 22 9.2.1. Connecting to the DUT for testing (Referring to Figure 8) 22 9.2.2. Dual Mode (DP++) Connection Diagram 22 9.2.3. Dual Mode (DP++) Test Procedure 23 9.2.4. Saving Dual Mode Test Results. 24 9.3. Manchester AUX Channel EYE Test 25 9.3.1. Manchester AUX Channel EYE Test Connection Diagram 25 9.3.2. Manchester AUX Channel EYE Test Connection Procedure 25 9.3.3. Saving AUX Channel EYE Test Results. 26



MODIFICATION RECORD

April 5, 2016 – Updated images to match latest version (8.0.0.x) of the QualiPHY compliance

test script

February 10th, 2015 – Draft 1 – Initial Draft Submitted to VESA Test Implementation Group



INTRODUCTION

This Method of Implementation describes the procedures to perform the DP Source tests as required by

the VESA DisplayPort Logo Compliance Program using the Teledyne LeCroy SDA 8 Zi-A Series Serial

Data Analyzer Oscilloscopes (or equivalent) by Teledyne LeCroy in conformance with the DP1.2b PHY

Compliance Test Specification (CTS). Source tests are required to qualify a Source product or silicon

building block for Logo certification and listing on the DP Integrators List.

Formally, each test description in the CTS contains the following sections:

Test Objective

Interoperability statement

Test conditions

Measurement requirements and

Pass/fail criteria

This MOI reduces the CTS test description to practice using the specified test equipment and procedures.



REFERENCES

The following documents are referenced in this text:

VESA DP PHY CTS Revision 1.2b – November 26th, 2012

This document is available to VESA members via the VESA workzone.

ACKNOWLEDGEMENTS

The people have contributed to the creation and maintenance of this document:

Mike Engbretson (Author/Editor) – Granite River Labs (GRL), Inc.

Alan Blankman (Contributor) – Teledyne LeCroy Inc.

Please send feedback on this document to [email protected] or contact

TeledyneLeCroy’s Customer Care Center at 800-5LECROY.

mailto:[email protected]



List of Figures

Figure 1: Teledyne LeCroy SDA 8 Zi-A Series, or WaveMaster 8Zi-A series with SDAIII or SDAIII-LinQ

and QPHY-DP option ........................................................................................................................................ 10 Figure 2: QualiPHY DisplayPort Software ............................................................................................................. 11 Figure 3: Wilder DP Plug Adapters with 6-pin Low Speed Connectors............................................................... 12 Figure 4: LUXSHARE-ICT DP Plug Adaptors ...................................................................................................... 12 Figure 5: AUX Channel Controller Examples ........................................................................................................ 12 Figure 6: DUT Connection Example for DP Testing .............................................................................................. 13 Figure 7: Running the DP Compliance Application ............................................................................................... 14 Figure 8: Configuration Menu Selection ................................................................................................................. 15 Figure 9: Configuration Menu ................................................................................................................................. 15 Figure 10: Test Selection Menu ................................................................................................................................ 16 Figure 11: Variable Setup Menu .............................................................................................................................. 17 Figure 12: Start the Tests .......................................................................................................................................... 17 Figure 13: Enable Automation Unchecked for Manual DUT Control .................................................................. 18 Figure 14: Configuring for 4 Lane testing using Switch Matrix ........................................................................... 19 Figure 15: 4 Lane test setup using Switch Matrix................................................................................................... 19 Figure 16: Report Generator Window ..................................................................................................................... 20 Figure 17: Report Generator Selection .................................................................................................................... 21 Figure 18: Wilder AUX Control Board used for Dual Mode Testing ................................................................... 22 Figure 19: Dual Mode (DP++) Connection Diagram .............................................................................................. 22 Figure 20: Dual Mode Tests Selection ...................................................................................................................... 23 Figure 21: Starting Dual Mode Tests ....................................................................................................................... 24 Figure 22: Manchester AUX Channel EYE Setup .................................................................................................. 25 Figure 23: Manchester AUX Channel EYE Test Selection .................................................................................... 26 Figure 24: Starting Manchester AUX Channel EYE Tests .................................................................................... 26



Source PHY Tests (CTS1.2b Section 3)

1. Introduction

This MOI (Method of Implementation) provides the test procedures for testing DisplayPort Source to the

DP 1.2b Compliance Test Specification (CTS). The purpose of the document is to provide the approved

test equipment, test connections and setup, and procedures for the DP1.2 compliance program. Review

and approval of compliance test procedures for DisplayPort is the responsibility of the VESA Test

Implementation Subgroup.

The test procedures in this document are only the Normative (or required) tests in the DP 1.2b CTS. For

informational tests, refer to the test equipment vendor’s documentation.

2. Test Pre-test Procedures

Prior to making any measurements, the following steps must be taken to assure accurate measurements:

Allow a minimum of 20 minutes warm-up time for oscilloscope.

Teledyne LeCroy oscilloscope calibrations are valid over a specific temperature range even after

a power cycle so the oscilloscope does not have to be re-calibrated before every test device or

every day.

If using probes, perform the probe calibration defined for the specific probes being used.

Make sure you use a torque wrench to make all SMA connections.

3. PHY CTS 1.2b Source Testing Overview

This section describes the procedure for testing the DisplayPort Source electrical parameters. This

testing is required for all ports on a device under test. The DP electrical parameters are as specified by

Section 3 of the PHY CTS 1.2b. The CTS is available to VESA members at www.vesa.org. Teledyne

LeCroy offers probing and automation software used for testing DisplayPort, which is used for this

procedure.

This document covers the following normative PHY CTS 1.2b tests. (Note that version 8.0.0.x of the

compliance test software described in this document also performs measurements for the informative

tests, 3.5 and 3.10, and measurements on HBR3 signals that as of the publication date of this

document are not yet covered by an official compliance test specification.)

3.1. EYE Diagram Testing

3.2. Non Pre-Emphasis Level Verification Testing

3.3. Pre-Emphasis Level Verification and Maximum Differential Pk-Pk Output Voltage

3.4. Inter-Pair Skew Test

3.11. Non ISI Jitter

3.12. Total Jitter (TJ) and Random Jitter (RJ/DJ)

3.14. Main Link Frequency

3.15. Spread Spectrum Modulation Frequency (if DUT supports SSC)

3.16. Spread Spectrum Modulation Deviation (if DUT supports SSC)

3.18. Dual-mode TMDS Clock (if DUT supports Dual-mode)

3.19. Dual-mode EYE Diagram (if DUT supports Dual-mode)

8.1. AUX Manchester – Channel EYE Test

http://www.vesa.org/



4. Test Objective Refer to the DisplayPort PHY CTS 1.2b for detailed test objectives for each test. Each section of the CTS

links back to the DisplayPort 1.2a Standard.

5. Test Conditions The PHY CTS describes in detail the test requirements and algorithms required for meeting the

specification. The following table summarizes the test conditions for the tests in the PHY CTS.

Test ID RBR (1.62Gb/s) HBR (2.7Gb/s) HBR2 (5.4Gb/s)

3.1 Eye Diagram Test

Test Point TP2 TP2 TP3_Eq

Pattern PRBS-7 PRBS-7 2520 Bit HBR2 Compliance Eye

Pattern

Swing/Pre-Emphasis /PostCursor2 2/0/0 2/0/0 Provided by DUT Owner for

Passing Condition

SW Channel NA NA 0 Length & Worst Case

SSC On and Off if DUT Supports On and Off if DUT Supports On and Off if DUT Supports

3.2 Non-Pre-Emphasis Level

Test Point TP2 TP2 TP2

Pattern PRBS-7 PRBS-7 80 Bit PLTPAT

Swing/Pre-Emphasis /PostCursor2 All/0/0 All/0/0 All/0/0

SSC Both On/Off if DUT Supports Both On/Off if DUT Supports Both On/Off if DUT Supports

3.3.1 Pre-Emphasis Level

Maximum Differential Pk-Pk

Output Voltage


Pattern PRBS-7 PRBS-7 80 Bit PLTPAT

Swing/Pre-Emphasis /PostCursor2 All/All/0 All/All/0 All/All/0


3.4 Inter-pair Skew

Bit Rate Highest Bit Rate Supported

Test Point TP2

Pattern PRBS-7 or DUT dependent custom pattern

Swing/Pre-Emphasis /PostCursor2 2/0/0


3.11 Non-ISI Jitter

Test Point TP2 TP2 NA

Pattern PRBS-7 PRBS-7 NA

Swing/Pre-Emphasis /PostCursor2 All/0/0 All/0/0 NA

SSC On and Off if DUT Supports On and Off if DUT Supports NA

3.12.1 Total (TJ) and

Deterministic (DJ) Jitter


Pattern PRBS-7 PRBS-7 2520 Bit HBR2 Compliance Eye

Pattern



Swing/Pre-Emphasis /PostCursor2 2/0/0 2/0/0 Provided by DUT Owner for

Passing Condition



3.12.2 HBR2 D10.2 TJ/RJ/DJ

Test Point NA NA TP3_Eq

Pattern NA NA D10.2

Swing/Pre-Emphasis /PostCursor2 NA NA NA


SSC NA NA On and Off if DUT Supports

3.14 Main Link Frequency


Pattern D10.2 D10.2 D10.2

Swing/Pre-Emphasis /PostCursor2 2/0/0 2/0/0 2/0/0


3.15 SSC Modulation Frequency

3.16 SSC Modulation Deviation

NA if SSC not supported NA if SSC not supported NA if SSC not supported


Pattern D10.2 D10.2 D10.2

Swing/Pre-Emphasis /PostCursor2 2/0/0 2/0/0 2/0/0

SSC On On On

3.18 Dual Mode TMDS Clock

3.19 Dual Mode Eye Diagram

Test Point TP2

Pattern TMDS (Random Output)

TMDS Clock Rate 148.5 MHz

Table 1 – 1.2b PHY CTS Source Test Conditions

6. Required Equipment for PHY CTS 1.2b Source Testing The following equipment is required for DisplayPort Source Testing:

1 ea. Teledyne LeCroy WaveMaster 8 Zi-A or SDA 8 Zi-A Oscilloscope (13GHz and above for

all tests, 8GHz for RBR and HBR tests) with the following software:

o QualiPHY DisplayPort Compliance Test Software

4 ea. SMA Cables (See Section 6.3)

o Alternatively, lanes can be tested one or two at a time using 12 SMA cables automated

with the Mini-Circuits model USB-4SPDT-A18 RF switch matrix.

1 ea. Wilder, Luxshare-ICT, or equivalent VESA approved DP Test Adapter.

o Note: If the DUT supports Dual Mode, then a 6-pin Low Speed Connector is required on

the fixture. For Example: Wilder DPI-TPA-P Adapter. This will be used for Dual Mode

testing later in this MOI.

If Automating Source Testing through AUX Control, use the following. Alternatively, the DUT’s

Source settings can be set manually.

o 1 ea. DP AUX Adapter Board (Wilder DPI-TPA-A for example) with:

2 ea. SMA Cables to connect AUX from Test Adapter to AUX Adapter board.

(Some adapters include these cables)

o 1 ea. Unigraf DPR-100

1 ea. DP Cable to connect to the DPR-100 to the AUX adapter board

2 ea. High Impedance Probe(For Aux Channel Tests)



6.1. LeCroy Oscilloscope (13 GHz or above for testing of all bit rates.)

A WaveMaster 8 Zi-A series or SDA 8 Zi-A series oscilloscope with 13 GHz oscilloscope is required

for performing HBR2 tests. If only RBR and HBR tests are performed, an 8 GHz oscilloscope is

required.

6.2. Software Option Requirements

The oscilloscope needs the following option codes

SDA3 or SDA3-LINQ. This is included on SDA 8 Zi-A series oscilloscopes, but not on

WaveMaster 8 Zi-Z. The part number to enable SDA3 option is WM8ZI-SDAIII, which

enables single-lane serial data analysis testing. WM8ZI-SDAIII-LINQ can be used, which

enables 4 lanes of analysis.

EYEDR2. This is required for HBR Worst Case tests. It is not included standard.

MANCHESTER-BUS. This enables the Manchester decoder option, which is required for

AUX Channel tests.

Figure 1: Teledyne LeCroy SDA 8 Zi-A Series, or WaveMaster 8Zi-A series with SDAIII or

SDAIII-LinQ and QPHY-DP option

6.3. QualiPHY DP Automation SW

The QualiPHY-DisplayPort SW automates all the measurements in the PHY CTS. In two port TBT

devices, Reduced Bit Rate (RBR – 1.62Gb/s), High Bit Rate (HBR – 2.7Gb/s), and High Bit Rate 2

(HBR2 – 5.4Gb/s). The initial released version of the DP script is 7.6.1.1



Figure 2: QualiPHY DisplayPort Software

6.4. VESA Approved Test Fixtures

The following diagram shows approved test fixtures for DP Source testing as of the writing of this

document. Refer to the following website for a full list of approved fixtures:

http://www.vesa.org/DisplayPort-developer/certified-components/

Approved Mini-DP Fixtures:

Wilder: mDP-TPA-P or RevA DPI-TPA-P with DPI-TPA-A Aux Control Board

LUXSHARE-ICT: mDP-TPA-P-5

Approved Standard DP Fixtures:

Wilder: DP-TPA-P or RevA mDPI-TPA-P with DPI-TPA-A Aux Control Board

LUXSHARE-ICT: DP-TPA-P-5

http://www.vesa.org/displayport-developer/certified-components/



Figure 3: Wilder DP Plug Adapters with 6-pin Low Speed Connectors

mDP-TPA-P-5 DP-TPA-P-5

Figure 4: LUXSHARE-ICT DP Plug Adaptors

6.5. Unigraf DPR-100

Figure 5: AUX Channel Controller Examples

7. DP Source Test Setup

The following diagram shows the connections for mDP DUT, Fixture, Oscilloscope, and AUX Channel

controller for automated testing for simultaneous connection of four channels. Connection for standard

DP testing will follow the same connection diagram only with the appropriate adapter.



Figure 6: DUT Connection Example for DP Testing

8. Connecting to the DUT for testing (Referring to Figure 6)

1. Plug X6 Sideband connector from DP Test Adapter (Wilder as an example) into the AUX

Adapter board.

2. Connect SMA Cables from the AUX connections on the Test Adaptor to the AUX connections on

the AUX Adapter board.

3. Connect the AUX Adapter board to the DP AUX Controller using a standard DP Cable.

4. Connect AUX Controller (DPR-100 as example) to Oscilloscope using a standard USB Cable.

Ensure that the driver for the AUX Controller is installed on the oscilloscope’s Windows OS.

5. Connect the SMA pairs on the DP test adapter to Scope channels

6. Ensure the DUT is powered.

9. Running the DisplayPort Compliance Tests

The following is the recommended test flow for a 2 lane Source that supports all Swing and Pre-

Emphasis Levels. The testing is broken up into the following two sub-sections.

1. RBR/HBR/HBR2 Measurements – this section takes advantage of the DPCD Control

over the AUX channel to capture all waveforms and performs all the required tests for

RBR and HBR. It also describes the test procedure if the DUT does not support

automation.

2. Dual Mode Measurements – this section describes how to put the DUT in a TMDS

signaling mode at the proper resolution in order to make the Dual Mode (DP++)

compliance measurements.



9.1. RBR/HBR/HBR2 Measurements

This section takes advantage of the DPCD Control over the AUX channel to capture all

waveforms and performs all the required tests for RBR and HBR.

It is highly desirable to perform these tests with automation due to the number of test conditions that

need to be performed. Full automation reduces an engineer’s time to execute and removes human

error from the DUT setup during testing. However, not all sources support full automation. Thus, both

automated and non-automated procedures are outlined below.

9.1.1. RBR/HBR/HBR2 Measurements if the DUT supports Automation

If using full automation, execute the RBR/HBR tests as follows:

1. Start DisplayPort App from LeCroy QualiPHY Framework

Figure 7: Running the DP Compliance Application

2. Click Edit/View Configuration to select a Template:



Figure 8: Configuration Menu Selection

Figure 9: Configuration Menu

3. Go to “Test Selector” Tab and select all Main Link, AUX and DP Alt mode tests to perform:



Figure 10: Test Selection Menu

4. Next, go to variable setup tab.

5. To setup Automation using DPR-100:

- Scroll to the TX Automation folder and change “Tx Automation” to “DPR-100”

- Key in the 40 digit key from label on DPR-100 to “DPR License Key” field.

(Note: if the DPR-100 does not include the label, contact Unigraf to purchase a license.)

- Enter the COM PORT number for “DPR-100 COM Port”, which can be found in Device

Manager.



Figure 11: Variable Setup Menu

6. Close the dialog and hit the “Start” button

Figure 12: Start the Tests

9.1.2. RBR/HBR/HBR2 Measurements without Automation

If using DUT vendor specific tool for controlling Data Rate, Swing, and Pre-Emphasis Levels,

follow this procedure:

1. Follow all the steps in the previous section with the exception of Step 5. In the “Variable

Setup” tab, change “Tx Automation” to “None”



Figure 13: Enable Automation Unchecked for Manual DUT Control

2. When running without automation, the DisplayPort SW will prompt you with

DisplayPort DUT Settings dialogs when a DUT change needs to occur.

3. Set DisplayPort DUT’s Bit rate, Swing, Pre-emphasis, PostCursor2, Test Pattern, and

SSC values as requested in the application.

4. After entering the proper setting on the DUT Control SW, Press OK on the application.

5. After the first set of waveforms are captured and analyzed on all channels, another

DisplayPort DUT Settings dialog will appear asking you to setup the DUT for the next

waveform.

6. Alternate between the DUT Control SW and the LeCroy dialog until all requested

waveforms are captured and analyzed. It will take approximately half a day to capture

and analyze all waveforms needed for RBR/HBR/HBR2 Compliance.

7. Continue to Section 9.1.4 to save and report results.

9.1.3. Running Compliance Testing with automation and a switch matrix

If using a switch matrix, all four channels can be tested with the same setup. In the Variables dialog shown

below, (Lane Setup folder), select Number of Lanes = 4. The DUT Configuration Menu and Test Setup

using a switch matrix is shown below.

The switch is a 4 x 2-to-1 switch..named A,B,C,D with the following connections:

A is paired with lane0+ and Lane2+

B is paired with lane0- and lane2-

C is paired with lane1+ and Lane3+

D is paired with Lane1- and Lane3-

Note: that when using this configuration that Lane0/Lane1 and Lane2/Lane3 Interpair Skew can be

measured directly, however Lane0/Lane2 Skew can be derived by the following equation:

lane0/lane2 Interpair Skew = lane0/lane1 Skew + lane1/lane2 Skew.



Figure 14: Configuring for 4 Lane testing using Switch Matrix

Figure 15: 4 Lane test setup using Switch Matrix



9.1.4. Viewing, Saving and Reporting RBR/HBR/HBR2 Compliance Test Results

All collected results must be stored and archived for references and reporting results for the VESA

Compliance program.

9.1.4.1. Viewing RBR/HBR/HBR2 Compliance Test Results

1. When all tests are completed, the report will be saved to the pre-selected format of

your choice.

Figure 16: Report Generator Window

2. Report Generator can also be brought up from main QualiPHY Window:

o Click “General Setup”

o Go to “Report Tab” and Click “Report Generator”



Figure 17: Report Generator Selection



9.2. Dual Mode Measurements (For DUTs that support Dual-Mode)

This section describes the procedure for running Dual Mode Display Port (DP++) tests as called out in

Sections 3.18 and 3.19 of the DP1.2b CTS. This procedure is implemented using the same setup as in

Figure8 with a fixture that is configured for Dual Mode testing.

9.2.1. Connecting to the DUT for testing (Referring to Figure 8)

In this example, the Wilder AUX adapter needs to be changed to the correct jumper settings for Dual

Mode testing. The following figure shows the correct jumper settings.

Wilder AUX Controller Board

Dual Mode Test Jumper Location

Figure 18: Wilder AUX Control Board used for Dual Mode Testing

9.2.2. Dual Mode (DP++) Connection Diagram

Figure 19: Dual Mode (DP++) Connection Diagram



9.2.3. Dual Mode (DP++) Test Procedure

The following procedure is to be used for Dual Mode testing.

1. Follow same procedure as 9.1 to bring up DisplayPort Application from QualiPHY

Framework but make sure you select “Dual Mode Tests” from “Test Selector” Tab:

Figure 20: Dual Mode Tests Selection

2. Close the dialog and hit the “Start” button.



Figure 21: Starting Dual Mode Tests

9.2.4. Saving Dual Mode Test Results.

Refer to Section 9.1.4 on details of saving the project and report results.



9.3. Manchester AUX Channel EYE Test

9.3.1. Manchester AUX Channel EYE Test Connection Diagram

Figure 22: Manchester AUX Channel EYE Setup

9.3.2. Manchester AUX Channel EYE Test Connection Procedure

The following procedure is to be used for Manchester AUX Channel EYE testing.

1. Follow same procedure as 9.1 to bring up DisplayPort Application from QualiPHY

Framework but make sure you select “AUX Channel Test” from “Test Selector” Tab:



Figure 23: Manchester AUX Channel EYE Test Selection

2. Close the dialog and hit the “Start” button.

Figure 24: Starting Manchester AUX Channel EYE Tests

9.3.3. Saving AUX Channel EYE Test Results.

Refer to Section 9.1.4 on details of saving the project and report results.

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