Rohde & Schwarz R&S RTP-K28 User manual

R&S®RTP-K28
C-PHY Compliance Test
User Manual
1179647202
Version 01
(;ÝÎÖ2)

This manual describes the C-PHY compliance test procedures with the following option:
●R&S®RTP-K28 (1802.9621.02) - C-PHY
The tests require the R&S ScopeSuite software.
The software contained in this product uses several valuable open source software packages. For information, see the "Open
Source Acknowledgment" document, which is available for download from the R&S RTP product page at http://www.rohde-
schwarz.com/product/rto.html > "Software".
Rohde & Schwarz would like to thank the open source community for their valuable contribution to embedded computing.
© 2022 Rohde & Schwarz GmbH & Co. KG
Muehldorfstr. 15, 81671 Muenchen, Germany
Phone: [phone] - 0
Email: [email protected]
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.
MIPI® marks and logos are service marks owned by MIPI Alliance, Inc. and any use of such marks by Rohde & Schwarz is under
license.
All other trademarks are the properties of their respective owners.
1179.6472.02 | Version 01 | R&S®RTP-K28
The following abbreviations are used throughout this manual: R&S®RTP is abbreviated as R&S RTP and R&S®ScopeSuite is abbre-
viated as R&S ScopeSuite.

Contents
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Contents
1 R&S ScopeSuite overview.....................................................................5
2 Preparing the measurements................................................................7
2.1 Test equipment..............................................................................................................7
2.2 Installing software and license.................................................................................... 7
2.3 Setting up the network................................................................................................. 8
2.4 Starting the R&S ScopeSuite....................................................................................... 8
2.5 Connecting the R&S RTP............................................................................................. 9
2.6 Report configuration...................................................................................................10
3 Performing tests...................................................................................12
3.1 Starting a test session................................................................................................12
3.2 Configuring the test.................................................................................................... 13
3.2.1 General test settings..................................................................................................... 14
3.3 Getting test results..................................................................................................... 15
4 C-PHY compliance tests......................................................................17
4.1 Starting C-PHY compliance tests.............................................................................. 17
4.2 Test configuration for C-PHY..................................................................................... 17
4.3 LP-TX signaling requirements (group 1)...................................................................19
4.3.1 Test setup......................................................................................................................19
4.3.2 Performing group 1 test cases...................................................................................... 21
4.3.3 Measurements.............................................................................................................. 22
4.4 HS-TX signaling requirements (group 2) - burst measurements............................37
4.4.1 Test setup......................................................................................................................37
4.4.2 Performing group 2 test cases...................................................................................... 38
4.4.3 Measurements.............................................................................................................. 40
4.5 HS-TX signaling requirements (group 2) - continuous measurements................. 45
4.5.1 Test setup......................................................................................................................45
4.5.2 Performing group 2 test cases...................................................................................... 46
4.5.3 Measurements.............................................................................................................. 48
4.6 HS-TX signaling requirements for eye measurements (group 2)........................... 55

Contents
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4.6.1 Test setup......................................................................................................................55
4.6.2 Performing group 2 test cases...................................................................................... 56
4.6.3 Meausrements.............................................................................................................. 57

R&S ScopeSuite overview
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1 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 con-
figuration
●"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:

R&S ScopeSuite overview
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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.

Preparing the measurements
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2 Preparing the measurements
2.1 Test equipment
For C-PHY compliance tests, the following test equipment is needed:
●R&S RTP oscilloscope with 4 channels and at least 13 GHz bandwidth
●The free-of-charge R&S ScopeSuite software, which can be installed on a com-
puter or directly on the oscilloscope.
●Differential probes
●Three singled-ended active probes or SMA cables.
●R&S RTP-K28 C-PHY compliance test option (required option, installed on the
oscilloscope)
●Recommended test fixture for LP-TX tests: MIPI C-PHY Capacitive Load (CLOAD)
fixture
●Recommended termination board for HS-TX tests: MIPI C-PHY Reference Termi-
nation Board (RTB)
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 Win-
dows " 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.
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.
Installing software and license

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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, 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.
See also:
●Chapter 2.5, "Connecting the R&S RTP", on page 9
2.4 Starting the R&S ScopeSuite
To start the R&S ScopeSuite on the test computer or on the oscilloscope:
► Double-click the R&S ScopeSuite program icon.
Starting the R&S ScopeSuite

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To start the R&S ScopeSuite on the instrument, in the R&S RTP firmware:
► In the "Apps" dialog, open the "Compliance" tab.
2.5 Connecting the R&S RTP
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 8. 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".
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.
Connecting the R&S RTP

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If the connection fails, an error message is shown.
2.6 Report configuration
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 Infor-
mation" section of the test report.
Report configuration

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Report configuration

Performing tests
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3 Performing tests
3.1 Starting a test session
After you open a compliance test, the "Session Selection" dialog appears. In this dia-
log, 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"
Starting a test session

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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".
3.2 Configuring the test
1. In the R&S ScopeSuite window, select the compliance test to be performed:
● "C-PHY"
2. Open a test session, see Chapter 3.1, "Starting a test session", on page 12.
3. Adjust the "Properties" settings for the test cases you want to perform.
4. Click "Limit Manager" and edit the limit criteria, see Chapter 3.2.1.1, "Limit man-
ager", on page 15.
5. If you want to use special report settings the "Report Config" tab to define the for-
mat and contents of the report. Otherwise the settings defined in "RSScopeSuite" >
"Settings" > "Report" are used. See Chapter 2.6, "Report configuration",
on page 10.
6. Click "Test Checked"/"Test Single" and proceed as described in the relevant test
case chapter.
Configuring the test

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3.2.1 General test settings
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 prop-
erties
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 mark-
ing 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 15.
●"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.
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.
Configuring the test

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3.2.1.1 Limit manager
The "Limit Manager" shows the measurement limits that are used for compliance test-
ing.
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.
3.3 Getting test results
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 10). If you
want to use special report settings for a session, you can define the format and con-
tents 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.
Getting test results

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The test report file can be created at the end of the test, or later in the "Session Selec-
tion" 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".
Getting test results

C-PHY compliance tests
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4 C-PHY compliance tests
The software closely follows the MIPI Alliance's Conformance Test Suite for C-PHY
SM Specification Version 2.1, dated July 31th, 2020.
4.1 Starting C-PHY compliance tests
1. Select "C-PHY" in the R&S ScopeSuite start window.
2. In the "Session Selection" dialog, choose the C-PHY standard version.
You can select one of the following : "1.2", "2.1".
3. Add a new test session and name it. See Chapter 3.1, "Starting a test session",
on page 12.
4. Open the test session.
5. Adjust the test configuration settings if necessary. See:
●Chapter 3.2.1.1, "Limit manager", on page 15
●Chapter 3.2, "Configuring the test", on page 13
6. Select/check the test cases that you want to run and click "Test Single"/"Test
checked".
7. 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.
4.2 Test configuration for C-PHY
The test configuration consists of the general configuration settings as described in
Chapter 3.2, "Configuring the test", on page 13, and some additional test-specific con-
figuration settings, described below:
Test configuration for C-PHY

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Channel selection
Selects the channels for the VA, VB and VC waveforms.
Select, if you are using a "Single-Ended Probes" or "SMA Cables".
You can also define a skew value for each channel.
When opening a new session, the skew values are read from the oscilloscope and the
skew fields are updated. To update the skew values at a later time, press "Retrieve
Skew".
DUT Settings
In this part you can define the settings of your DUT.
Data type ← DUT Settings
Selects the data type of the DUT. You can select between the continuous and burst
mode.
LP Mode ← DUT Settings
Selects the low-power mode. You can choose between a Normal low power (LP) mode
or low voltage low power (LVLP) mode.
HS Mode ← DUT Settings
You can choose between a normal high speed (HS) mode or low voltage high speed
(LVHS) mode.
Test configuration for C-PHY

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HS Symbol Rate ← DUT Settings
Set the high-speed symbol rate of the DUT.
PROGSEQ ← DUT Settings
Enable for DUTs that support the programmable sequence. You can also enter the
value of the sequence.
Data Lane
Select the data lane number to be tested. Default selection is data lane "0".
CLOAD
●If a CLOAD test fixture with 50 pF termination capacitance is used, select "50 pF".
●If the 50 pF CLOAD fixture is removed, select "Open".
The test results may not be valid, if no CLOAD test fixture with 50 pF termination capaci-
tance is used. The optional "Open" configuration setting is used to provide a qualitative
estimate of the amount of CLOAD contributed by the DUT's PCB.
Export Waveform
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>\<SessionType>\<SessionName>
For example:
%ProgramData%\Rohde-Schwarz\RSScopeSuite\5.20.0\Sessions\C-PHY
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.
4.3 LP-TX signaling requirements (group 1)
The purpose of group 1 test cases is to verify various requirements specific to data
lane low power (LP) signaling. The tests of this group perform a set of related LP-TX
measurements on a single Lane LP-TX waveform sequence (e.g., ULPS Entry).
4.3.1 Test setup
Table 4-1: Equipment for Group 1 LP-TX signaling requirements test
Item Description, model Quantity
Rohde & Schwarz oscilloscope R&S RTP with 4 channels and at least 13 GHz bandwidth 1
Probes Any single-ended active probes or SMA cables 3
LP-TX signaling requirements (group 1)

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Item Description, model Quantity
Test fixture UNH-IOL MIPI C-PHY Capacitive Load (CLOAD) Fixture 1
DUT Any MIPI C-PHY device 1
Waveform Requirements
A typical LP signal waveform for this test case are as shown in the figure below:
LP-TX signaling requirements (group 1)