Rohde&Schwarz R&S®RTP-K93 DDR4 Compliance Test Manual
R&S®RTP-K93
DDR4 Compliance Test
User Manual
(;Üñ:2)
1178991002
Version 03
This document describes the DDR4 Compliance Test Procedures of the following option:
●
R&S®RTP-K93 (1801.3671.02)
Other functionality of the option is described in the instrument's user manual.
© 2021 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: +49 89 41 29 - 0
Email: info@rohde-schwarz.com
Internet: www.rohde-schwarz.com
Subject to change – data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1178.9910.02 | Version 03 | R&S®RTP-K93
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®ScopeSuite is indicated as
R&S ScopeSuite.
R&S®RTP-K93
2.1 Test Equipment..............................................................................................................9
2.1.1 Soldering Guide for Modular Probes...............................................................................9
2.2 Installing Software and License.................................................................................. 9
2.3 Setting Up the Network...............................................................................................10
2.4 Starting the R&S ScopeSuite..................................................................................... 11
2.5 Connecting the R&S RTP........................................................................................... 11
2.6 Report Configuration.................................................................................................. 13
Contents
Contents
1 R&S ScopeSuite Overview....................................................................7
2 Preparing the Measurements................................................................9
3 Performing Tests..................................................................................14
3.1 Starting a Test Session...............................................................................................14
3.2 Configuring the Test................................................................................................... 15
3.2.1 General Test Settings....................................................................................................16
3.2.2 Test Configuration for DDR4......................................................................................... 18
3.3 Initiating the Test.........................................................................................................21
3.4 Getting Test Results....................................................................................................22
3.5 Starting DDR4 Tests....................................................................................................22
4 Timing Tests......................................................................................... 24
4.1 Clock Timing................................................................................................................24
4.1.1 Test Equipment............................................................................................................. 24
4.1.2 Performing the Tests..................................................................................................... 24
4.1.3 Test Setup..................................................................................................................... 25
4.1.4 Measurements.............................................................................................................. 25
4.2 Data Timing..................................................................................................................27
4.2.1 Test Equipment............................................................................................................. 27
4.2.2 Performing the Tests..................................................................................................... 27
4.2.3 Test Setup..................................................................................................................... 28
4.2.4 Measurements.............................................................................................................. 28
4.3 Strobe Timing.............................................................................................................. 29
4.3.1 Test Equipment............................................................................................................. 29
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4.3.2 Performing the Tests..................................................................................................... 29
4.3.3 Test Setup..................................................................................................................... 30
4.3.4 Measurements.............................................................................................................. 31
4.4 Command Timing........................................................................................................33
4.4.1 Test Equipment............................................................................................................. 33
4.4.2 Performing the Tests..................................................................................................... 33
4.4.3 Test Setup..................................................................................................................... 34
4.4.4 Measurements.............................................................................................................. 34
4.5 Address Timing........................................................................................................... 35
4.5.1 Test Equipment............................................................................................................. 35
4.5.2 Performing the Tests..................................................................................................... 35
4.5.3 Test Setup..................................................................................................................... 36
4.5.4 Measurements.............................................................................................................. 36
Contents
4.6 Chip Select Timing......................................................................................................37
4.6.1 Test Equipment............................................................................................................. 37
4.6.2 Performing the Tests..................................................................................................... 37
4.6.3 Test Setup..................................................................................................................... 38
4.6.4 Measurements.............................................................................................................. 38
5 Electrical Tests..................................................................................... 39
5.1 Single-Ended Signals................................................................................................. 39
5.1.1 AC & DC Input Levels for ADD and CMD..................................................................... 39
5.1.2 AC Input Levels for CK..................................................................................................41
5.1.3 Output Levels for DQ.................................................................................................... 43
5.1.4 AC Overshoot & Undershoot for ADD, CMD and CTRL (DDR4).................................. 45
5.1.5 AC Overshoot & Undershoot for ADD and CTRL (LPDDR4/LPDDR4X)...................... 47
5.1.6 AC Overshoot & Undershoot for CK............................................................................. 49
5.1.7 Overshoot & Undershoot for LVSTL for CK, CS, CKE and ODT...................................52
5.1.8 AC Overshoot & Undershoot for DQ, DQS, and DM.....................................................53
5.1.9 Overshoot & Undershoot for LVSTL for DQ, DQS, and DMI.........................................55
5.1.10 Input Slew Rate for ADD and CMD...............................................................................57
5.1.11 AC & DC Output Levels for DQ..................................................................................... 59
5.1.12 Output Slew Rate for DQ.............................................................................................. 61
5.2 Differential Signals......................................................................................................63
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5.2.1 AC & DC Input Levels for CK........................................................................................ 63
5.2.2 Input Slew Rate for CK..................................................................................................65
5.2.3 Differential Cross Point Voltage for CK......................................................................... 67
5.2.4 AC Input Levels for DQS...............................................................................................68
5.2.5 AC Differential Cross Point Voltage for DQS.................................................................70
5.2.6 Input Slew Rate for DQS...............................................................................................72
5.2.7 Differential AC Output Levels for DQS..........................................................................73
5.2.8 Differential Output Slew Rate for DQS..........................................................................75
Contents
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Contents
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R&S®RTP-K93
1 R&S ScopeSuite Overview
R&S ScopeSuite Overview
The R&S ScopeSuite software is used with R&S RTP oscilloscopes. It can be installed
on a test computer or directly on the oscilloscope. For system requirements, refer to
the Release Notes.
The R&S ScopeSuite main panel has several areas:
●
"Settings": connection settings to oscilloscope and other instruments also default
report settings
●
"Compliance Tests": selection of the compliance test
●
"Demo": accesses demo test cases that can be used for trying out the software
without having a connection to an oscilloscope
●
"Help": opens the help file, containing information about the R&S ScopeSuite configuration
●
"About": gives information about the R&S ScopeSuite software
●
"Tile View": allows a personalization of the compliance test selection
You can configure which tests are visible in the compliance test section and which
are hidden, so that only the ones you use are displayed.
► To hide a test from the "Compliance Tests" view, do one of the following:
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R&S ScopeSuite Overview
a) Right-click on the compliance test you want to hide.
The icon of the test changes, see Figure 1-1. Now with a left click you can hide
the test.
Figure 1-1: Unpin icon
b) Click on "Title View" to show a list of the available test cases. By clicking a test
case in the show list, you can pin/unpin it from the main panel.
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2 Preparing the Measurements
2.1 Test Equipment
Preparing the Measurements
Installing Software and License
For DDR4 compliance tests, the following test equipment is needed:
●
R&S RTP with 4 channels and minimum 8 GHz bandwidth
●
R&S RTP-K93 DDR4 compliance test option (required option, installed on the
R&S RTP)
●
4 modular probes, R&S ZM90 with 9 GHz bandwidth. See also Chapter 2.1.1,
"Soldering Guide for Modular Probes", on page 9.
●
4 modular probe tips R&S RT-ZMA10
●
The free-of-charge R&S ScopeSuite software, which can be installed on a computer or directly on the R&S RTP.
2.1.1 Soldering Guide for Modular Probes
All single-ended signals such as ADD, CMD, DQ, DM, CS, CKE should be soldered so
that the signal is connected to the + part on the probe tip. The ground of the signal
should be connected to the - part on the same probe tip.
All differential signals such as CK, DQS should be soldered differentially:
●
The + signal is connected to the + part on the probe tip.
●
The - signal is connected to the - part on the same probe tip.
●
The ground of the signal is connected to the ground of the same probe tip.
2.2 Installing Software and License
The preparation steps are performed only once for each computer and instrument that
are used for testing.
Uninstall older versions of the R&S ScopeSuite
If an older version of the R&S ScopeSuite is installed, make sure to uninstall the old
version before you install the new one. You can find the version number of the current
installation in "Help" menu > "About". To uninstall the R&S ScopeSuite, use the Windows " Control Panel" > "Programs".
For best operation results, we recommend that the installed firmware versions of the
R&S ScopeSuite and the oscilloscope are the same.
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Preparing the Measurements
Setting Up the Network
To install the R&S ScopeSuite
1. Download the latest R&S ScopeSuite software from the "Software" section on the
Rohde & Schwarz R&S RTP website:
www.rohde-schwarz.com/product/rtp.html
www.rohde-schwarz.com/product/rto.html
2. Install the R&S ScopeSuite software:
● On the computer that is used for testing, or
● On the R&S RTP.
For system requirements, refer to the Release Notes.
To install the license key on the R&S RTP
► When you got the license key of the compliance test option, enable it on the oscil-
loscope using [Setup] > "SW Options".
For a detailed description, refer to the R&S RTP user manual, chapter "Installing
Options", or to the online help on the instrument.
2.3 Setting Up the Network
If the R&S ScopeSuite software runs on a test computer, the computer and the testing
oscilloscope require a LAN connection.
There are two ways of connection:
●
LAN (local area network): It is recommended that you connect to a LAN with DHCP
server. This server uses the Dynamic Host Configuration Protocol (DHCP) to
assign all address information automatically.
If no DHCP server is available, or if the Tabor WX2182B or WX2182C is used for
automatic testing, assign fixed IP addresses to all devices.
●
Direct connection of the instruments and the computer or connection to a switch
using LAN cables: Assign fixed IP addresses to the computer and the instruments
and reboot all devices.
To set up and test the LAN connection
1. Connect the computer and the instruments to the same LAN.
2. Start all devices.
3. If no DHCP server is available, assign fixed IP addresses to all devices.
4. Ping the instruments to make sure that the connection is established.
5. If VISA is installed, check if VISA can access the instruments.
a) Start VISA on the test computer.
b) Validate the VISA address string of each device.
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2.4 Starting the R&S ScopeSuite
2.5 Connecting the R&S RTP
Preparing the Measurements
Connecting the R&S RTP
See also:
●
Chapter 2.5, "Connecting the R&S RTP", on page 11
To start the R&S ScopeSuite on the test computer or on the oscilloscope:
► Double-click the R&S ScopeSuite program icon.
To start the R&S ScopeSuite on the instrument, in the R&S RTP firmware:
► In the "Apps" dialog, open the "Compliance" tab.
If the R&S ScopeSuite is installed directly on the instrument, the software detects the
R&S RTP firmware automatically, and the "Oscilloscope" button is not available in the
R&S ScopeSuite.
If the R&S ScopeSuite software runs on a test computer, the computer and the testing
oscilloscope require a LAN connection, see Chapter 2.3, "Setting Up the Network",
on page 10. The R&S ScopeSuite software needs the IP address of the oscilloscope to
establish connection.
1. Start the R&S RTP.
2. Start the R&S ScopeSuite software.
3. Click "Settings" > "Oscilloscope".
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Preparing the Measurements
Connecting the R&S RTP
4. Enter the IP address of the oscilloscope.
To obtain the IP address: press the Rohde & Schwarz logo at the top-right corner
of the oscilloscope's display.
5. Click "Get Instrument Information".
The computer connects with the instrument and gets the instrument data.
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2.6 Report Configuration
Preparing the Measurements
Report Configuration
If the connection fails, an error message is shown.
In the "Report Configuration" menu, you can select the format of the report and the
details to be included in the report. You can also select an icon that is displayed in the
upper left corner of the report.
Also, you can enter common information on the test that is written in the "General Information" section of the test report.
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3 Performing Tests
3.1 Starting a Test Session
Performing Tests
Starting a Test Session
After you open a compliance test, the "Session Selection" dialog appears. In this dialog, you can create new sessions, open or view existing report.
The following functions are available for handling test sessions:
Function Description
"Add" Adds a new session
"Open" Opens the selected session
"Remove" Removes the selected session
"Rename" Changes the "Session Name"
"Comment" Adds a comment
"Show report" Generates a report for the selected session
To add a test session
1. In the R&S ScopeSuite window, select the compliance test.
2. In the "Session Selection" dialog press "Add".
3. If necessary change the "Session Name"
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3.2 Configuring the Test
Performing Tests
Configuring the Test
To open a test session
1. In the R&S ScopeSuite window, select the compliance test.
2. In the "Session Selection" dialog, select the session you want to open and double
click on it.
Alternatively, select the session and press "Open".
To show a report for a test session
1. In the R&S ScopeSuite window, select the compliance test.
2. In the "Session Selection" dialog, select the session you want the report for and
press "Show report".
1. In the R&S ScopeSuite window, select the compliance test to be performed:
● "DDR4"
2. Select the DDR4 type and the speed.
3. Open a test session, see Chapter 3.1, "Starting a Test Session", on page 14.
4. Adjust the "Properties" settings for the test cases you want to perform.
5. Click "Limit Manager" and edit the limit criteria, see Chapter 3.2.1.1, "Limit Man-
ager", on page 17.
6. If you want to use special report settings the "Report Config" tab to define the format and contents of the report. Otherwise the settings defined in "RSScopeSuite" >
"Settings" > "Report" are used. See Chapter 2.6, "Report Configuration",
on page 13.
7. Click "Test Checked"/"Test Single" and proceed as described in the relevant test
case chapter.
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3.2.1 General Test Settings
Performing Tests
Configuring the Test
Each session dialog is divided into several sections:
●
"Properties": shows the settings that can be made for the test case selected on the
left side of the dialog. You can differentiate between the "All" and the sub test properties
In the "All" > "Properties" tab you can configure the settings for all test cases in the
current session. Once you change and save a setting in this tab, the changes will
be done for all test in the sessions. At the same time, there will be a special marking for the functions that have different settings for different sub tests.
●
"Limit Manager": sets the measurement limits that are used for compliance testing,
see Chapter 3.2.1.1, "Limit Manager", on page 17.
●
"Results": shows an overview of the available test results for this session.
●
"Instruments": defines instruments settings for connecting to external devices, that
are specific for this test session.
When a session is first created the global settings ("RSScopeSuite" > "Settings" >
"Instruments") are copied to the session. This "Instruments" tab can be used to
change those copied defaults.
●
"Report Config": defines the format and contents of the report for this session.
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3.2.1.1 Limit Manager
Performing Tests
Configuring the Test
When a session is first created the global settings ("RSScopeSuite" > "Settings" >
"Report") are copied to the session. This "Report Config" tab can be used to
change those copied defaults.
●
"Test Checked"/ "Test Single": starts the selected test group.
The "Limit Manager" shows the measurement limits that are used for compliance testing.
Each limit comprises the comparison criterion, the unit, the limit value A, and a second
limit value B if the criterion requires two limits.
You can set the values to defaults, change the values in the table, export the table in
xml format, or import xml files with limit settings.
► Check and adjust the measurement limits.
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3.2.2 Test Configuration for DDR4
Performing Tests
Configuring the Test
The test configuration consists of some test-specific configuration settings. The values
for the settings in this tab depend on the selected "Speed" and "Type" of standard.
Figure 3-1: Configuration for DDR4 compliance tests
Signals
Selects the channel for the specified signal.
For electrical tests consider also how many test signals are enabled. For example, if
only the ADD/CMD signal is selected, only ADD/CMD signal is used to run the test. If
both the ADD and the CMD signals are selected, test is run using ADD signal first, followed by the CMD signal.
The following signals are available according to the selected test case:
"ADD"
"CMD"
"CK"
"DQS"
"DQ"
"DM"
Address signal.
Command signal.
Differential clock input signal.
Data strobe signal.
Data input/output signal.
Data mask signal.
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Performing Tests
Configuring the Test
"CS"
"CKE"
Chip select signal.
Clock enable signal.
Threshold Settings
The following threshold settings are defined:
"VDD"
"V
"
REF
"V
REFDQ
"
"VSS"
"V
"
DDQ
"VTT"
"V
"
SSQ
"AC Level for
Power Supply
Reference voltage
DQ reference voltage
Ground
DQ Power Supply
VTT = V
DDQ
/2
DQ Ground
AC level for the command address.
CA"
"DC Level for
DC level for the command address.
CA"
Triggering Method
Selects the triggering method.
"Phase"
Checks the phase difference between DQ and DQS to differentiate
the type (read or write) of burst.
"Amplitude"
Checks the peak-peak amplitude difference between read and write
signals on DQS to differentiate the type (read or write) of burst.
"Advanced"
Enables the definition of more detailed trigger conditions:
●
"Min Phase for Read"/"Max Phase for Read": sets the minimum/
maximum phase for the read burst.
●
"Min Phase for Write"/"Max Phase for Write": sets the minimum/
maximum phase for the write burst.
●
"Amplitude Relationship": sets the amplitude relationship between
the read and write burst.
●
"P-P Amplitude Threshold": sets the peak-peak amplitude threshold.
Threshold Mode
Selects between the absolute and relative threshold mode.
Upper/Middle/Lower Threshold ← Threshold Mode
Sets the upper/middle/lower for the absolute threshold mode.
Top/Middle/Base Ratio ← Threshold Mode
Set the top/middle/base ratio for the relative threshold mode.
Average Window
Sets the average window in periods.
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Performing Tests
Configuring the Test
Record Length
Sets the number of waveform samples in one waveform record.
Burst Count
Sets the burst count.
Speed Bin (CL-nRCD-nRP)
Selects which speed bin is used for the tests.
CAS Latency (CL)
Selects the value for the CAS latency. It is the delay, measured in clock cycles,
between the internal read command and the availability of the first bit of output data.
CAS Write Latency (CWL)
Selects the value for the CAS write latency. It is the delay, measured in clock cycles,
between the internal write command and the availability of the first bit input data.
Data Bus Inversion
Enables data bit inversion. It helps to improve the signal integrity and reduce the power
consumption.
Export Waveforms
Enables you to export a waveform. You can later load the waveforms to run the tests in
the offline mode, see Offline Execution.
You can define an export directory, or use the default one:
MyDocuments\Rohde-Schwarz\RSScopeSuite\<Version>\Waveforms\
<ComplianceTest>\<SubTest>\<Speed>\<SessionName>
For example:
MyDocuments\Rohde-Schwarz\RSScopeSuite\4.10.0\Waveforms\DDR4\
DDR4\2133\DDR4_2133_20190114_144116
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Performing Tests
Initiating the Test
Offline Execution
If enabled, allows you to use exported waveforms as a source for the execution of the
compliance test.
You can select one waveform for each needed signal.
3.3 Initiating the Test
To perform compliance tests, the device under test is connected to the test board in a
test-specific way. Using a probe, the test board is connected with the R&S RTP. The
probe connections are test-specific. The R&S ScopeSuite guides you step-by-step
through the connection setup and the test sequence.
1. Set the test setup on a nonconductive, static-approved work surface.
2. In the R&S ScopeSuite window, select the compliance test.
3. Open a test session, see Chapter 3.1, "Starting a Test Session", on page 14.
4. Check the test configuration settings and adjust, if necessary. See: Chapter 3.2,
"Configuring the Test", on page 15.
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3.4 Getting Test Results
Performing Tests
Starting DDR4 Tests
5. Click "Test Checked" for starting all checked test cases or "Test Single" for starting
only the selected test case.
The R&S ScopeSuite test wizard explains the following individual setup steps. A
detailed test description can be found in the following chapters:
● Chapter 3.5, "Starting DDR4 Tests", on page 22
If you resume an existing session, new measurements are appended to the report,
new diagrams and waveform files are added to the session folder. Existing files are not
deleted or replaced. Sessions data remain until you delete them in the "Results" tab of
the session.
The report format can be defined in "RSScopeSuite" > "Settings" > "Report" for all
compliance tests (see also Chapter 2.6, "Report Configuration", on page 13). If you
want to use special report settings for a session, you can define the format and contents of the report in the "Report Config" tab of the session.
All test results are listed in the "Results" tab. Reports can be provided in PDF,
MSWord, or HTML format. To view and print PDF reports, you need a PDF viewer, for
example, the Acrobat Reader.
The test report file can be created at the end of the test, or later in the "Session Selection" dialog.
To show a test report
1. In the R&S ScopeSuite window, select the compliance test to be performed.
2. Select the session name in the "Session Selection" dialog and click "Show report".
The report opens in a separate application window, depending on the file format.
You can check the test results and print the report.
To delete the results, diagrams and waveform files of a session
1. In the "Session Selection" dialog select the session and open it.
2. In the "Results" tab, select the result to be deleted.
3. Click "Remove".
3.5 Starting DDR4 Tests
Before you run the test, complete the following actions:
●
LAN connection of the oscilloscope and the computer running the R&S ScopeSuite, see Chapter 2.5, "Connecting the R&S RTP", on page 11
1. Select "DDR4" in the R&S ScopeSuite start window.
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Performing Tests
Starting DDR4 Tests
2. In the "Session Selection" dialog, set the "Select Type" standard. The following
"Types" are available:
● "DDR4": Double data rate type three. Used for desktops and servers.
● "LPDDR4": low power DDR4. Consumes very low power and is used for mobile
phones.
● "LPDDR4X": low power DDR4 extended. Consumes very low power and is
used for mobile phones. Its headlined lower I/O voltage to save system power.
3. Set the "Select Speed". There are preset speeds you can select from:
"1600"/"1866"/"2133"/"2400"/"2666"/"2933"/"3200"/"4266"
4. Add a new test session.
5. Open the session. For details, see Chapter 3.1, "Starting a Test Session",
on page 14.
6. Check the test configuration settings. Adjust, if necessary. See:
● Chapter 3.2.2, "Test Configuration for DDR4", on page 18
● Chapter 3.2.1.1, "Limit Manager", on page 17
7. Select/check the test cases you want to run and click "Test Single"/"Test checked".
8. A step-by step guide explains the following individual setup steps. When you have
finished all steps of the step-by-step guide, the compliance test runs automatically.
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4 Timing Tests
4.1 Clock Timing
4.1.1 Test Equipment
Timing Tests
Clock Timing
Item Description, model Quantity
Rohde & Schwarz oscilloscope R&S RTP with 4 channels and minimum 8 GHz band-
Modular probe probe with minimum 9 GHz bandwidth 1
Probe tip R&S RT-ZMA10 1
DUT DDR4 device that supports the selected type 1
4.1.2 Performing the Tests
1. Start the test as described in Chapter 3.5, "Starting DDR4 Tests", on page 22.
2. Select "Timing Tests" > "Clock Timing".
1
width
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