Agilent Technologies W2642A User manual

W2642A Quick Start Guide Rev. AP12
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Rev. AP12 W2642A Quick Start Guide
Chapter 1 - Getting Started
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Started
This chapter provides an overview of the W2642A and its role in supporting DisplayPort test automation with
Agilent test instruments.
DisplayPort Test Automation
Agilent Technologies and Quantum Data have partnered to provide a full solution for DisplayPort compliance
testing. Agilent’s AUX Channel Controller has been incorporated into the 882E product (offered as the W2642A
by Agilent) for purposes of supporting physical layer test automation for the DisplayPort main link using Agilent
equipment. Incorporating the AUX Channel Controller into the Quantum Data 882E product enables customers to
have a complete solution for compliance testing: physical layer testing for the main link, link layer compliance
testing (offered as an option to the 882E) and HDCP compliance testing (also offered as an option to the 882E).
A key contribution of the DisplayPort specification is the potential to fully automate testing of transmitters,
receivers, and branch devices (at the physical and link layer) through AUX channel control of the device under
test. The overall objective of the AUX Channel Controller is to support the test needs of DisplayPort
manufacturers and ensure that they can get the complete set of design validation and compliance test tools
essential for DisplayPort product development.
Additional Compliance Options
You can add the link layer and HDCP compliance test options to your W2642A by contacting your Quantum Data
distributor. Refer to “Chapter 5 - Application Extensions” on page 32 for more details on these options. The
instructions provided in this Quick Start Guide pertain specifically to the use of the W2642A (882E-DP) as a
DisplayPort AUXiliary Channel Controller. Instructions for operating the additional application options for the
W2642A (882E-DP) can be found in the User Guide which is available on the downloads page of the Quantum
Data website:
http://www.quantumdata.com/downloads/index.asp.
What’s in the W2642A shipping box?
You will find the following items in the W2642A shipping box:
W2642A (882E with the Agilent AUX Channel Controller function).
Adapter board (P/N 99-00607) – used for connecting the W2642A to the Agilent W2641A DisplayPort Test
Point Access Adapter.
Ethernet crossover patch cable (P/N 30-00151) – used for connecting to the 882 over the LAN interface.
Serial null modem cable (P/N 30-00124) – used for connecting to the 882 over the serial interface.
Detachable power cable – used for powering the W2642A.
DisplayPort cable (P/N 30-00162) – used for connecting to the 882 over the serial interface.
ESD warning sheet (P/N 68-00204) – used for protecting the DisplayPort interface against static discharge
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W2642A Quick Start Guide Rev. AP12
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This Quick Start Guide (P/N 68-00211)
Introduction to the W2642A
The model W2642A is a test instrument based on the Quantum Data 882E. The W2642A incorporates the
Agilent-created AUX Channel Controller functionality for automated testing of the physical layer of the DisplayPort
main link. All other functions are disabled but can be added by contacting Quantum Data.
Connectors
The video interfaces on the W2642A (882E) applicable to DisplayPort are shown below.
Figure 1-1 – W2642A Back Panel
Interface Description
DISPLAYPORT AUX CHANNEL ANALYZER TO SOURCE connector enables you to monitor the AUX
channel transactions with the Quantum Data ACA option (not provided with the base W2642A). A DisplayPort
cable is connected from a DisplayPort source device to this port.
DISPLAYPORT AUX CHANNEL ANALYZER TO SINK connector enables you to monitor the AUX channel
transactions with the Quantum Data ACA option (not provided with the base W2642A). A DisplayPort cable is
connected from a DisplayPort display device to this port.
DISPLAYPORT TX connector outputs DisplayPort-compatible digital video signals. This connector is used
when testing a DisplayPort sink device during automated testing. Pattern generation is not provided with the
base W2642A but it can be added as an option. It emulates a DisplayPort source device.
DISPLAYPORT RX connector receives DisplayPort-compatible digital video signals. This connector is used
when testing a DisplayPort sink device during automated testing. It emulates a DisplayPort sink device. Signal
analysis is not provided with the base W2642A but it can be added as an option.
Administrative Connectors Description
The following connectors are found on the lower half of the back panel of the 882E frame.

Rev. AP12 W2642A Quick Start Guide
SERIAL connector provides RS-232C serial data communication interface for the generator. This interface is
used for the command line interface.
DEBUG connector is for Quantum Data use only.
ETHERNET connector enables you to connect to the instrument through an IP session for controlling the
AUXiliary channel through the Agilent test automation systems:
oThe Agilent U7232A Automation Software
oThe Agilent N5990A Automation Software.
oThe Agilent W2642A Graphical User Interface
The Ethernet interface is also used when upgrading the generator.
GPIB connector provides IEEE-488 GPIB interface to the generator (882 only; not provided on 881
generators).
Front panel
This subsection describes the front panel interface for operating the generator. All features of the 882E not related
to the AUX Channel Controller function have been disabled in the base W2642A product. Therefore many of the
W2642A menus for the standard 882E functions have been disabled. However the administrative functions are
still available. You will only need to use these front panel keys to specify the IP address. The front panel keys are
shown below.
Figure 1-2 – W2642A Front Panel
Upgrading the W2642A
When there is a new version of the AUX Channel Controller software available for the W2642A, you may want to
upgrade. The new software can be found on the Quantum Data downloads
page: www.quantumdata.com/downloads/index.asp. The upgrade procedures are provided in the 882E User
Guide also available at the link shown above.
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Rev. AP12 W2642A Quick Start Guide
Chapter 1 - Testing DisplayPort Sources
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Port Sources
This chapter describes the test setup for testing DisplayPort source devices. Testing the physical layer of a
DisplayPort source device requires the Agilent U7232A DisplayPort Source Compliance Test Software and the
Series DSO/DSA90000A Infiniium Oscilloscope. If the software was purchased with the Series DSO/DSA90000A
Oscilloscope, this software should be pre-installed on the oscilloscope. If you need to download new software for
the DSO/DSA90000A Oscilloscope, you can do so at the following web page:
http://www.agilent.com/find/scope-apps-sw
What you will need
You will need the following items for the test.
Source Device under test
Agilent Series DSO/DSA90000A Oscilloscope with the U7232A DisplayPort Source Compliance Test
Software
W2641A DisplayPort Test Point Access Adapter
W2642A AUX Channel Controller
Miscellaneous W2642A accessories:
- Ethernet cross over cable
- DisplayPort cable (2 meter)
- Adaptor Board (p/n 99-00607)
Test workflow
Testing a DisplayPort source device involves the following high level steps:
1. Assemble all the test instruments, devices and equipment to test in your laboratory.
2. Complete the physical test setup in accordance with the test setup diagram (Figure 2-1) below.
3. Configure the Adaptor Board (p/n 99-00607) for testing a DisplayPort source (See Figure 2-2).
4. Enable the AUX Channel Control function in the W2642A (See Enabling the ACC function below). Note that
this can also be accomplished with the W2642A GUI.
5. (Recommended) Configure W2642A with valid EDID and DPCD data (See Reading and writing an EDID
and Reading and writing DPCD registers in Chapter 4 below.
6. Turn on the DSO/DSA90000A Oscilloscope and launch Agilent U7232A DisplayPort Source Compliance
Test Software using the oscilloscopes Analyzer menu.
7. Enter test setup details in the Setup tab of the U7232A DisplayPort Source Compliance Software, ensuring
selection of the W2642A in the Fixture Selection field.
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8. Select tests desired in the Select Tests tab
9. Follow the Connection screen guidance which will address the specifics of your particular test connections
and configuration.
10. Select Run Tests after confirming selections.
Test Setup
The setup for testing DisplayPort source devices is shown in Figure 2-1 below. For a more detailed test method
please consult the U7232A Help dialog.
Figure 2-1 – Test Setup for DisplayPort Source Tests

Rev. AP12 W2642A Quick Start Guide
Figure 2-2 – Adapter board setting for source tests – jumpers on “TX” pins
Connecting to the W2642A
You will need to configure the W2642A to enable connection from the Agilent test applications. To establish
communication between the W2642A and the automated test system, the W2642A must have an IP address and
a physical Ethernet connection between the W2642A and the PC host for the DisplayPort Test Controller
(W2642A GUI) or the Agilent Automated Test Instrumentation platform.
from the Agilent test applications. To establish
communication between the W2642A and the automated test system, the W2642A must have an IP address and
a physical Ethernet connection between the W2642A and the PC host for the DisplayPort Test Controller
(W2642A GUI) or the Agilent Automated Test Instrumentation platform.
You can either connect to the W2642A over your LAN network, through a hub or you can connect directly. To
connect over the LAN you connect a standard Ethernet patch cable (not provided) between the Ethernet port on
the W2642A and a LAN access jack or Ethernet hub. To connect directly you connect the Ethernet crossover
cable (provided) between the Ethernet port on the W2642A and the PC host: either the Infiniium oscilloscope, or
the (W2642A GUI). These two connection methods are illustrated in the figures below.
You can either connect to the W2642A over your LAN network, through a hub or you can connect directly. To
connect over the LAN you connect a standard Ethernet patch cable (not provided) between the Ethernet port on
the W2642A and a LAN access jack or Ethernet hub. To connect directly you connect the Ethernet crossover
cable (provided) between the Ethernet port on the W2642A and the PC host: either the Infiniium oscilloscope, or
the (W2642A GUI). These two connection methods are illustrated in the figures below.
Figure 2-3 – Ethernet/IP connection to W2642A through corporate LAN network
Note: If you are using a PC that is connected to a network that automatically assigns an IP address, and you will
be disconnecting from that network to connect to the crossover cable and generator, you must manually enter an
IP address into the Agilent Test System application or host PC so it can communicate with the generator. The
network portions of the IP addresses of the W2642A and the Agilent Test System application or host PC must
match.
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Figure 2-4 – Ethernet/IP connection to W2642A via direct connection
To set the generator’s IP address:
1. Press the Tools key. The Tools menu appears on the generator’s display as shown below.
2. Choose the System item by pressing the adjacent soft key. The System menu appears on the generator’s
display as shown below.
3. Choose the Network item by pressing the adjacent soft key. The generator’s IP address and subnet mask
appear on the generator’s display as shown below.
4. Press the Settings key. The Network Connection screen appears on the generator’s display as shown below.
If the IP Address configuration option is not visible, press the soft key adjacent to the arrow symbol by
SubnetMask until IP Address appears.
1. Change the IP address as follows:

Rev. AP12 W2642A Quick Start Guide
2. Position the blinking cursor on the address digit you want to change. To do this, press the soft key adjacent
to the arrow by the address to move the cursor left or right until it appears on the digit you want to change.
3. Adjust the value of the digit up or down by pressing the + or -keys. Repeat for each IP address digit you want
to change.
4. To save the changes, press the Enter (Options) key. The following choices appear on the generator’s
display:
To save the changes, choose the Yes item by pressing the adjacent soft key.
To exit without saving the changes, choose the No item.
To return to the previous screen without saving the changes, choose the Back item.
To enable DHCP for auto IP address configuration of the generator:
1. Press the Tools key. The Tools menu appears on the generator’s display as shown below.
2. Choose the System item by pressing the adjacent soft key. The System menu appears on the generator’s
display as shown below.
3. Choose the Network item by pressing the adjacent soft key. The generator’s IP address and subnet mask
appear on the generator’s display as shown below.
4. Press the Settings key. The Network Connection screen appears on the generator’s display as shown below.
5. If the DHCP configuration option is not visible, press the soft key adjacent to the arrow symbol by Subnet
Mask or IP Address until the DHCP configuration screen appears.
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6. Change the setting to YES by pressing the + key.
7. To save the changes, press the Enter (Options) key. The following choices appear on the generator’s
display:
To save the changes, choose the Yes item by pressing the adjacent soft key.
To exit without saving the changes, choose the No item.
To return to the Network Connection screen without saving the changes, choose the Back item.

Rev. AP12 W2642A Quick Start Guide
Enabling the AUX Channel Control function
After you have set the IP address you will have to enable the AUX Channel Controller functionality in the W2642A.
The Agilent Applications can enable the AUX Channel Controller functionality but you can also enable the function
through the W2642A command line. Use the following procedures.
tionality in the W2642A.
The Agilent Applications can enable the AUX Channel Controller functionality but you can also enable the function
through the W2642A command line. Use the following procedures.
To enable the AUX Channel Controller function:To enable the AUX Channel Controller function:
1. Establish a connection to the W2642A over the Ethernet/IP interface by opening up a web browser and enter
the W2642A’s IP address into the address entry field.
1. Establish a connection to the W2642A over the Ethernet/IP interface by opening up a web browser and enter
the W2642A’s IP address into the address entry field.
The W2642A web home page will appear in the browser:The W2642A web home page will appear in the browser:
Figure 2-5 – W2642A Web Home Page
2. Click on the item called CMD Terminal.
The command terminal will appear in a browser as shown below:
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Figure 2-6 – W2642A Command Terminal
3. Enter the following command into the enter field of the CMD Terminal:
DPTC:DPTG 1
The AUX Channel Controller functionality is now enabled in the W2642A. You can now connect to the
W2642A with the W2642A GUI application, or with the automated test applications.
Note: Each time you reboot the W2642A you will have to enter this command if you wish to re-enable the
AUX Channel Control function.

Rev. AP12 W2642A Quick Start Guide
Chapter 3 - Testing DisplayPort Sinks
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Port Sinks
Overview
This chapter describes the test setup for testing DisplayPort sinks (also referred to as receivers or display
devices). Testing the physical layer of DisplayPort display devices requires the Agilent J-BERT N4903A with the
N5990A-155 DisplayPort Sink Test Software. If you need to download new software, you can do so at the
following web page:
What you will need
You will need the following items for the test.
DisplayPort sink device under test
Agilent Stressed Signal Generator - Agilent N4903A J-BERT or E4887A TMDS Generator
N4915-006 ISI Generation
N5990A Factory Automation Software with option 155 DisplayPort Sink Test Software
W2641A DisplayPort Test Point Access Adapter
Miscellaneous accessories:
Splitters, rise time converters, attenuators, cables as found in the DisplayPort Sink Test Method of
Implementation, 5989-9147EN
W2642A AUX Channel Controller
Miscellaneous W2642A accessories:
- Ethernet cable
- DisplayPort cable (2meter)
- Adaptor Board (p/n 99-00607)
For Calibration of the system:
Agilent DSS90804A for Jitter calibration measurement
BIT_DP_RTF_0001 Receptacle Test Point Access Fixture (from Bitifeye Corporation)
Test workflow
Testing a DisplayPort display device involves the following high level steps:
1. Assemble all the test instruments, devices and equipment to test in your laboratory.
2. Complete the physical test setup in accordance with Figure 3-1 below.
3. Configure the Adaptor Board (p/n 99-00607) for testing a sink (See Figure 3-2 below).
4. Turn on the Agilent Stressed Signal Generator (J-BERT N4903) with the Agilent J-BERT N4903 with the
N5990A-155 Receiver Test Software.
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5. Calibrate the Stressed Signal Generator setup with the Agilent Infiniium DSA90000A Digital Signal Analyzer.
6. Establish a communication session between Agilent J-BERT N4903 with the N5990A-155 Receiver Test
Software and the W2642A AUX Channel Controller over the Ethernet (LAN) interface.
7. Enable the AUX Channel Control function in the W2642A (See Enabling the ACC function below).
Test Setup
This subsection describes the test setup for testing DisplayPort Sink devices. The following is an illustration of the
setup for testing DisplayPort sink devices. The MOI, 5989-9147EN addresses the detailed requirements to
greater degree than can be shown here.
Figure 3-1 – Test Setup for Sink Tests

Rev. AP12 W2642A Quick Start Guide
Figure 3-2 – Adapter board setting for sink tests – jumpers on “RX” pins
Connecting to the W2642A
You will need to configure the W2642A to enable connection from the Agilent test applications. To establish
communication between the W2642A and the automated test system, the W2642A must have an IP address and
a physical Ethernet connection between the W2642A and the PC host for the DisplayPort Test Controller
(W2642A GUI) or the Agilent Automated Test Instrumentation platform.
from the Agilent test applications. To establish
communication between the W2642A and the automated test system, the W2642A must have an IP address and
a physical Ethernet connection between the W2642A and the PC host for the DisplayPort Test Controller
(W2642A GUI) or the Agilent Automated Test Instrumentation platform.
You can either connect to the W2642A over your LAN network, through a hub or you can connect directly. To
connect over the LAN you connect a standard Ethernet patch cable (not provided) between the Ethernet port on
the W2642A and a LAN access jack or Ethernet hub. To connect directly you connect the Ethernet crossover
cable (provided) between the Ethernet port on the W2642A and the Agilent Test system. These two connection
methods are illustrated in the figures below.
You can either connect to the W2642A over your LAN network, through a hub or you can connect directly. To
connect over the LAN you connect a standard Ethernet patch cable (not provided) between the Ethernet port on
the W2642A and a LAN access jack or Ethernet hub. To connect directly you connect the Ethernet crossover
cable (provided) between the Ethernet port on the W2642A and the Agilent Test system. These two connection
methods are illustrated in the figures below.
Figure 2-3 – Ethernet/IP connection to W2642A through corporate LAN network
Note: If you are using a PC that is connected to a network that automatically assigns an IP address, and you will
be disconnecting from that network to connect to the crossover cable and generator, you must manually enter an
IP address into the Agilent Test System application or host PC so it can communicate with the generator. The
network portions of the IP addresses of the W2642A and the Agilent Test System application or host PC must
match.
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Figure 3-4 – Ethernet/IP connection to W2642A via direct connection
To set the generator’s IP address:
5. Press the Tools key. The Tools menu appears on the generator’s display as shown below.
6. Choose the System item by pressing the adjacent soft key. The System menu appears on the generator’s
display as shown below.
7. Choose the Network item by pressing the adjacent soft key. The generator’s IP address and subnet mask
appear on the generator’s display as shown below.
8. Press the Settings key. The Network Connection screen appears on the generator’s display as shown below.
If the IP Address configuration option is not visible, press the soft key adjacent to the arrow symbol by
SubnetMask until IP Address appears.
5. Change the IP address as follows:

Rev. AP12 W2642A Quick Start Guide
6. Position the blinking cursor on the address digit you want to change. To do this, press the soft key adjacent
to the arrow by the address to move the cursor left or right until it appears on the digit you want to change.
7. Adjust the value of the digit up or down by pressing the + or -keys. Repeat for each IP address digit you want
to change.
8. To save the changes, press the Enter (Options) key. The following choices appear on the generator’s
display:
To save the changes, choose the Yes item by pressing the adjacent soft key.
To exit without saving the changes, choose the No item.
To return to the previous screen without saving the changes, choose the Back item.
To enable DHCP for auto IP address configuration of the generator:
1. Press the Tools key. The Tools menu appears on the generator’s display as shown below.]
2. Choose the System item by pressing the adjacent soft key. The System menu appears on the generator’s
display as shown below.
3. Choose the Network item by pressing the adjacent soft key. The generator’s IP address and subnet mask
appear on the generator’s display as shown below.
4. Press the Settings key. The Network Connection screen appears on the generator’s display as shown below.
5. If the DHCP configuration option is not visible, press the soft key adjacent to the arrow symbol by Subnet
Mask or IP Address until the DHCP configuration screen appears.
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6. Change the setting to YES by pressing the + key.
7. To save the changes, press the Enter (Options) key. The following choices appear on the generator’s
display:
To save the changes, choose the Yes item by pressing the adjacent soft key.
To exit without saving the changes, choose the No item.
To return to the Network Connection screen without saving the changes, choose the Back item.