R&S®FSV3-K145
3GPP 5G NR Uplink Measurement
Application
User Manual
(;ÜêÅ2)
1178925502
Version 09
This manual applies to the following R&S®FSV3000 and R&S®FSVA3000 models with firmware version
1.90 and higher:
●
R&S®FSV3004 (1330.5000K04) / R&S®FSVA3004 (1330.5000K05)
●
R&S®FSV3007 (1330.5000K07) / R&S®FSVA3007 (1330.5000K08)
●
R&S®FSV3013 (1330.5000K13) / R&S®FSVA3013 (1330.5000K14)
●
R&S®FSV3030 (1330.5000K30) / R&S®FSVA3030 (1330.5000K31)
●
R&S®FSV3044 (1330.5000K43) / R&S®FSVA3044 (1330.5000K44)
●
R&S®FSV3050 (1330.5000K50) / R&S®FSVA3050 (1330.5000K51)
The following firmware options are described:
●
R&S®FSV3-K145 (5G NR R15 Uplink Measurements) (1330.7225.02)
●
R&S®FSV3-K147 (5G NR Combined EVM / ACLR / SEM Measurements) (1346.4250.02)
●
R&S®FSV3-K148 (5G NR R16 Downlink / Uplink Measurements) (1346.4914.02)
●
R&S®FSV3-K171 (5G NR R17 Downlink / Uplink Measurements) (1346.5362.02)
© 2022 Rohde & Schwarz GmbH & Co. KG
Muehldorfstr. 15, 81671 Muenchen, 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.
1178.9255.02 | Version 09 | R&S®FSV3-K145
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®FSV3000 is indicated as
R&S FSV3000.
R&S®FSV3-K145
1 Documentation overview.......................................................................9
1.1 Getting started manual................................................................................................. 9
1.2 User manuals and help.................................................................................................9
1.3 Service manual............................................................................................................10
1.4 Instrument security procedures................................................................................ 10
1.5 Printed safety instructions.........................................................................................10
1.6 Data sheets and brochures........................................................................................ 10
1.7 Release notes and open-source acknowledgment (OSA).......................................10
1.8 Application notes, application cards, white papers, etc......................................... 11
2 Welcome to the 5G NR measurement application............................ 12
Contents
Contents
2.1 Overview of the 5G NR applications......................................................................... 12
2.2 Installation................................................................................................................... 14
2.3 5G NR measurement application selection.............................................................. 14
2.4 Display information.....................................................................................................14
3 Measurements and result displays.................................................... 17
3.1 Selecting measurements............................................................................................17
3.2 Selecting result displays............................................................................................ 18
3.3 Performing measurements.........................................................................................19
3.4 Result summary.......................................................................................................... 19
3.5 I/Q measurements....................................................................................................... 27
3.6 PRACH analysis.......................................................................................................... 41
3.7 Frequency sweep measurements..............................................................................43
3.8 Combined measurements.......................................................................................... 46
3.9 Reference: custom limits........................................................................................... 48
4 Configuration........................................................................................51
4.1 I/Q measurement......................................................................................................... 51
4.1.1 Configuration overview..................................................................................................52
4.1.2 Automatic measurement configuration..........................................................................53
4.1.3 Physical signal description............................................................................................ 55
4.1.4 Test scenarios............................................................................................................... 58
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4.1.5 Component carrier configuration...................................................................................59
4.1.6 Radio frame configuration............................................................................................. 64
4.1.7 Bandwidth part configuration.........................................................................................68
4.1.8 Slot configuration.......................................................................................................... 72
4.1.9 PUSCH and PUCCH configuration............................................................................... 80
4.1.10 Antenna port configuration............................................................................................ 96
4.1.11 Advanced settings.........................................................................................................97
4.1.12 Generator control........................................................................................................ 101
4.1.13 Input source configuration...........................................................................................105
4.1.14 Frequency configuration..............................................................................................107
4.1.15 Amplitude configuration...............................................................................................108
4.1.16 Trigger configuration....................................................................................................111
4.1.17 Data capture................................................................................................................113
Contents
4.1.18 Tracking.......................................................................................................................116
4.1.19 Demodulation.............................................................................................................. 119
4.2 Frequency sweep measurement configuration......................................................120
4.3 Combined measurement configuration.................................................................. 123
4.3.1 Signal description........................................................................................................124
4.3.2 Signal capture............................................................................................................. 125
4.3.3 Trigger configuration................................................................................................... 126
4.4 Combined measurement guide................................................................................129
4.4.1 General configuration..................................................................................................130
4.4.2 Trigger configuration................................................................................................... 131
4.5 Microservice export.................................................................................................. 139
4.6 Time trigger measurement guide.............................................................................140
4.7 Reference: structure of .allocation files..................................................................141
4.8 Basics on input from I/Q data files.......................................................................... 149
5 Analysis.............................................................................................. 150
5.1 General analysis tools.............................................................................................. 150
5.1.1 Data export..................................................................................................................150
5.1.2 Diagram scale............................................................................................................. 151
5.1.3 Zoom........................................................................................................................... 152
5.1.4 Markers....................................................................................................................... 152
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5.2 Analysis tools for I/Q measurements......................................................................153
5.2.1 Layout of numerical results......................................................................................... 153
5.2.2 Result settings.............................................................................................................154
5.2.3 Table configuration......................................................................................................157
5.2.4 Result views................................................................................................................ 158
5.2.5 Evaluation range......................................................................................................... 159
5.3 Analysis tools for combined measurements..........................................................163
5.3.1 Event filter................................................................................................................... 163
5.3.2 General analysis tools.................................................................................................164
5.4 Analysis tools for frequency sweep measurements............................................. 164
6 Remote control...................................................................................165
6.1 Common suffixes...................................................................................................... 165
Contents
6.2 Introduction............................................................................................................... 166
6.2.1 Conventions used in descriptions............................................................................... 167
6.2.2 Long and short form.................................................................................................... 167
6.2.3 Numeric suffixes..........................................................................................................168
6.2.4 Optional keywords.......................................................................................................168
6.2.5 Alternative keywords................................................................................................... 168
6.2.6 SCPI parameters.........................................................................................................169
6.3 5G NR application selection.....................................................................................171
6.4 Screen layout.............................................................................................................174
6.4.1 General layout.............................................................................................................174
6.4.2 Layout of a single channel.......................................................................................... 176
6.5 Measurement control................................................................................................184
6.5.1 Measurements............................................................................................................ 184
6.5.2 Measurement sequences............................................................................................186
6.6 Remote commands to retrieve numeric results.....................................................188
6.6.1 Result summary.......................................................................................................... 188
6.6.2 Marker table................................................................................................................ 212
6.6.3 CCDF table................................................................................................................. 215
6.7 Limit check results....................................................................................................216
6.7.1 EVM limits................................................................................................................... 217
6.7.2 Frequency sweep limits...............................................................................................225
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6.8 Retrieve trace data.................................................................................................... 232
6.8.1 Using the TRACe[:DATA] command........................................................................... 232
6.8.2 Read measurement results......................................................................................... 244
6.9 Configuration.............................................................................................................249
6.9.1 General configuration..................................................................................................249
6.9.2 Automatic configuration...............................................................................................251
6.9.3 Physical settings......................................................................................................... 254
6.9.4 Component carrier configuration.................................................................................259
6.9.5 General radio frame configuration...............................................................................263
6.9.6 Bandwidth part configuration.......................................................................................265
6.9.7 Slot configuration........................................................................................................ 269
6.9.8 SRS configuration....................................................................................................... 276
6.9.9 PUCCH allocation configuration..................................................................................285
Contents
6.9.10 PUSCH allocation configuration..................................................................................291
6.9.11 Enhanced PUCCH allocation configuration................................................................ 298
6.9.12 Enhanced PUSCH settings: DMRS............................................................................ 306
6.9.13 Enhanced PUSCH settings: PTRS............................................................................. 315
6.9.14 Enhanced PUSCH settings: scrambling / coding........................................................ 321
6.9.15 Antenna port configuration.......................................................................................... 324
6.9.16 Advanced settings: global........................................................................................... 326
6.9.17 Advanced settings: reference point A......................................................................... 329
6.9.18 Generator control........................................................................................................ 332
6.9.19 Input configuration.......................................................................................................338
6.9.20 Frequency configuration..............................................................................................341
6.9.21 Amplitude configuration...............................................................................................343
6.9.22 Data capture................................................................................................................348
6.9.23 Trigger.........................................................................................................................351
6.9.24 Tracking.......................................................................................................................355
6.9.25 Demodulation.............................................................................................................. 357
6.9.26 PRACH analysis..........................................................................................................359
6.9.27 Frequency sweep measurements............................................................................... 362
6.9.28 Combined measurements........................................................................................... 364
6.10 Analysis..................................................................................................................... 370
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6.10.1 General analysis tools.................................................................................................370
6.10.2 Analysis tools for I/Q measurements.......................................................................... 383
6.10.3 Analysis tools for combined measurements................................................................392
Contents
List of commands (5G NR uplink).................................................... 395
Index....................................................................................................406
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Contents
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1 Documentation overview
1.1 Getting started manual
Documentation overview
User manuals and help
This section provides an overview of the R&S FSV/A user documentation. Unless
specified otherwise, you find the documents at:
www.rohde-schwarz.com/manual/FSVA3000
www.rohde-schwarz.com/manual/FSV3000
Further documents are available at:
www.rohde-schwarz.com/product/FSVA3000
www.rohde-schwarz.com/product/FSV3000
Introduces the R&S FSV/A and describes how to set up and start working with the
product. Includes basic operations, typical measurement examples, and general information, e.g. safety instructions, etc.
A printed version is delivered with the instrument. A PDF version is available for download on the Internet.
1.2 User manuals and help
Separate user manuals are provided for the base unit and the firmware applications:
●
Base unit manual
Contains the description of all instrument modes and functions. It also provides an
introduction to remote control, a complete description of the remote control commands with programming examples, and information on maintenance, instrument
interfaces and error messages. Includes the contents of the getting started manual.
●
Firmware application manual
Contains the description of the specific functions of a firmware application, including remote control commands. Basic information on operating the R&S FSV/A is
not included.
The contents of the user manuals are available as help in the R&S FSV/A. The help
offers quick, context-sensitive access to the complete information for the base unit and
the firmware applications.
All user manuals are also available for download or for immediate display on the Internet.
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1.3 Service manual
1.4 Instrument security procedures
Documentation overview
Release notes and open-source acknowledgment (OSA)
Describes the performance test for checking the rated specifications, module replacement and repair, firmware update, troubleshooting and fault elimination, and contains
mechanical drawings and spare part lists.
The service manual is available for registered users on the global Rohde & Schwarz
information system (GLORIS):
R&S®FSVA3000/FSV3000 Service manual
Deals with security issues when working with the R&S FSV/A in secure areas. It is
available for download on the Internet.
1.5 Printed safety instructions
Provides safety information in many languages. The printed document is delivered with
the product.
1.6 Data sheets and brochures
The data sheet contains the technical specifications of the R&S FSV/A. It also lists the
firmware applications and their order numbers, and optional accessories.
The brochure provides an overview of the instrument and deals with the specific characteristics.
See www.rohde-schwarz.com/brochure-datasheet/FSV3000 /
www.rohde-schwarz.com/brochure-datasheet/FSVA3000
1.7 Release notes and open-source acknowledgment (OSA)
The release notes list new features, improvements and known issues of the current
firmware version, and describe the firmware installation.
The software makes use of several valuable open source software packages. An opensource acknowledgment document provides verbatim license texts of the used open
source software.
See www.rohde-schwarz.com/firmware/FSV3000 /
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1.8 Application notes, application cards, white papers,
Documentation overview
Application notes, application cards, white papers, etc.
www.rohde-schwarz.com/firmware/FSVA3000
etc.
These documents deal with special applications or background information on particular topics.
See www.rohde-schwarz.com/application/FSV3000 /
www.rohde-schwarz.com/application/FSVA3000
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2 Welcome to the 5G NR measurement appli-
Welcome to the 5G NR measurement application
Overview of the 5G NR applications
cation
The 5G NR application is a firmware application that adds functionality to measure signals according to the 3GPP 5G NR (new radio) standard on the downlink to the
R&S FSV/A.
Bandwidth of 5G NR signals
5G NR signals have a bandwidth between 5 MHz and 400 MHz.
Measuring signals greater than 10 MHz requires an R&S FSV/A with one of the
optional bandwidth extensions (28 MHz or more).
This user manual contains a description of the functionality that the application provides, including remote control operation. Functions that are not discussed in this manual are the same as in the spectrum application and are described in the R&S FSV/A
user manual. The latest versions of the manuals are available for download at the
product homepage.
https://www.rohde-schwarz.com/manual/fsv3000
● Overview of the 5G NR applications....................................................................... 12
● Installation...............................................................................................................14
● 5G NR measurement application selection.............................................................14
● Display information..................................................................................................14
2.1 Overview of the 5G NR applications
You can equip the R&S FSV/A with one or more NR 5G applications. Each of the applications provides functionality for specific measurement tasks.
R&S FSV3-K144
The R&S FSV3-K144 is designed to measure NR 5G signals on the downlink.
The application supports features up to 3GPP release 15.
●
Basic signal characteristics (like multiple component carriers, frequency ranges
and channel bandwidths).
●
(Automatic) demodulation and configuration of the PDSCH and synchronization
signal (SS/PBCH).
●
Configuration and analysis of multiple frames and bandwidth parts (multi-numerology).
●
Configuration and analysis of special downlink channels and reference signals (like
the PDCCH, the CSI-RS or the PT-RS).
●
Configuration and analysis of various demodulation reference signals.
●
Mapping of channels to different antenna ports.
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Welcome to the 5G NR measurement application
Overview of the 5G NR applications
●
LTE coexistance analysis.
●
Synchronization of the configuration with a connected Rohde & Schwarz signal
generator.
●
Tools to refine and filter the measurement results.
●
Various result displays that show the measured signal characteristics in a diagram
or a numeric result table.
●
Available measurements: EVM, ACLR, SEM, time alignment and on / off power.
R&S FSV3-K145
The R&S FSV3-K145 is designed to measure NR 5G signals on the uplink.
The application supports features up to 3GPP release 15.
●
Basic signal characteristics (like multiple component carriers, frequency ranges
and channel bandwidths).
●
(Automatic) demodulation and configuration of the PUSCH.
●
Configuration and analysis of multiple frames and bandwidth parts (multi-numerology).
●
Configuration and analysis of special uplink channels and reference signals (like
the PUCCH, the PRACH, the SRS or the PT-RS).
●
Configuration and analysis of various demodulation reference signals.
●
Mapping of channels to different antenna ports.
●
Synchronization of the configuration with a connected Rohde & Schwarz signal
generator.
●
Tools to refine and filter the measurement results.
●
Various result displays that show the measured signal characteristics in a diagram
or a numeric result table.
●
Available measurements: EVM, ACLR and SEM.
R&S FSV3-K147
The R&S FSV3-K147 is designed to combine different 5G NR measurements in a single measurement sequence, either on the downlink or on the uplink.
Note that this application requires the R&S FSV3-K144 or -K145.
The application supports the following features.
●
Combined analysis of EVM, ACLR and SEM in a single application.
●
Automatic measurement of multiple, subsequent events with a single analyzer.
●
Increased measurement speed due to optimized measurement methods.
●
Advanced trigger configuration.
●
Extended functionality of the result displays that reflect the measurement
sequence.
R&S FSV3-K148
The R&S FSV3-K148 extends the functionality of the base application with features
introduced with 3GPP release 16.
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2.2 Installation
Welcome to the 5G NR measurement application
Display information
Note that this application requires the R&S FSV3-K144 or -K145.
Release 16 features include:
●
Configuration of DCI parameters.
●
Configuration and analysis of the PRS.
●
New operating bands, slot formats (for IAB) and test models introduced with
release 16.
●
New channel bandwidth introduced with release 16 (70 MHz).
●
Increased PDSCH DMRS length.
●
Increaed number of SS/PBCH blocks to support shared spectrum access.
Find detailed installation instructions in the getting started or the release notes of the
R&S FSV/A.
2.3 5G NR measurement application selection
The 5G NR measurement application adds a new application to the R&S FSV/A.
Starting the application
1. Press the [MODE] key on the front panel of the R&S FSV/A.
A dialog box opens that contains all operating modes and applications currently
available on your R&S FSV/A.
2. Select the "5G NR" item.
The R&S FSV/A opens a new measurement channel for the 5G NR measurement
application.
The measurement is started immediately with the default settings. It can be configured
in the "Overview" dialog box, which is displayed when you select the "Overview" softkey from any menu.
2.4 Display information
The following figure shows a measurement diagram during analyzer operation. All different information areas are labeled. They are explained in more detail in the following
sections.
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Welcome to the 5G NR measurement application
Display information
1 2 3 7 8
1 = Toolbar
2 = Channel bar
3 = Diagram header
4 = Result display
5 = Subwindows (Views)
6 = Subwindow header
7 = Status bar
8 = Softkeys
4
5 6
Channel bar information
In the 5G NR measurement application, the R&S FSV/A shows the following settings:
Table 2-1: Information displayed in the channel bar in the 5G NR measurement application
Ref Level Reference level.
Att Mechanical and electronic RF attenuation.
Inp: File Freq Frequency for I/Q file input.
Freq Frequency for other input sources (RF etc.).
Mode* 5G NR mode (link direction and channel bandwidth).
Frame Count* The first number represents the number of frames that have already been
captured.
The second number represents the total number of frames that will be
captured.
The third number in brackets represents the number of frames currently in
the capture buffer.
Capture Time Signal length that has been captured.
Frame Selected frame number.
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Welcome to the 5G NR measurement application
Display information
BWP/SS* Shows the signal part for which results are displayed (evaluation range).
SS = synchronization signal
BWP = bandwidth part
View<x> Information about the contents of View 1 and View 2.
Select the button for access to the dialog box for view configuration.
SGL Indicates that single sweep measurement is active.
Auto Demod Once Select the button to start automatic signal demodulation.
Consecutive CC Meas Number of component carriers that are measured; the numbers in paren-
theses indicate the number of component carriers that are analyzed in a
single capture.
Example: 8 (3 / 3 / 2) means that 8 component carriers are analyzed in
three consecutive data captures. The first two data captures analyze the
first 6 component carriers (3 CCs each), while the last data capture analyzes the last 2 component carriers.
*If you capture more than one data stream (for example several component carriers), the R&S FSV/A
shows two values separated by a slash. The first number corresponds to the first analyzed data stream,
the second number to the second analyzed data stream.
The channel bar also displays information on instrument settings that affect the measurement results even though this is not immediately apparent from the display of the
measured values (for example transducer or trigger settings). This information is displayed only when applicable for the current measurement. For details, see the
R&S FSV/A getting started manual.
Diagram header
The information in the diagram header depends on the result display.
●
All diagrams show the window number and type of result display.
●
Most diagrams contain trace information.
●
Some diagrams contain controls to customize the diagram contents. The diagram
header of the "Allocation Summary", for example, contains a control to select which
columns are displayed.
●
If you analyze multiple component carriers or frames, the diagram header shows
which CC or frame is analyzed.
Status bar information
Global instrument settings, the instrument status and any irregularities are indicated in
the status bar beneath the diagram. Furthermore, the progress of the current operation
is displayed in the status bar.
Regarding the synchronization state, the application shows the following labels.
●
"Sync OK"
The synchronization was successful. The status bar is green.
●
"Sync Failed"
The synchronization was not successful. The status bar is red.
If you are measuring several component carriers, the message also indicates
which component carrier could not be synchronized.
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3 Measurements and result displays
Measurements and result displays
Selecting measurements
The 5G NR measurement application measures and analyzes various aspects of a 5G
NR signal.
The application provides several measurements and result displays.
●
Measurements capture and analyze the signal in a different way.
●
Result displays are different representations of the measurement results. They are
either diagrams that show the results as a graph or tables that show the results as
numbers.
Remote command:
Measurement selection: CONFigure[:NR5G]:MEASurement on page 250
Result display selection: LAYout:ADD[:WINDow]? on page 176
● Selecting measurements.........................................................................................17
● Selecting result displays..........................................................................................18
● Performing measurements......................................................................................19
● Result summary...................................................................................................... 19
● I/Q measurements...................................................................................................27
● PRACH analysis......................................................................................................41
● Frequency sweep measurements...........................................................................43
● Combined measurements.......................................................................................46
● Reference: custom limits.........................................................................................48
3.1 Selecting measurements
Access: "Overview" > "Select Measurement"
The "Select Measurement" dialog box contains several buttons. Each button represents a measurement. A measurement in turn is a set of result displays that thematically belong together and that have a particular display configuration. If these predefined display configurations do not suit your requirements, you can add or remove
result displays as you like. For more information about selecting result displays, see
Chapter 3.2, "Selecting result displays", on page 18.
Depending on the measurement, the R&S FSV/A changes the way it captures and processes the raw signal data.
EVM
EVM measurements record, process and demodulate the signal's I/Q data. The result
displays available for EVM measurements show various aspects of the 5G NR signal
quality.
For EVM measurements, you can combine the result displays in any way.
For more information on the result displays, see Chapter 3.5, "I/Q measurements",
on page 27.
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Measurements and result displays
Selecting result displays
Remote command:
CONFigure[:NR5G]:MEASurement on page 250
PRACH Analysis
EVM measurements record, process and demodulate the PRACH. The result displays
available for PRACH measurements show various aspects of the PRACH signal quality.
For PRACH measurements, you can combine the result displays in any way.
Remote command:
CONFigure[:NR5G]:MEASurement on page 250
Combined EVM / ACLR / SEM
Combined measurements are a sequence of individual measurements that evaluate
the EVM, ACLR and / or SEM of a DUT.
For more information on the result displays, see Chapter 3.8, "Combined measure-
ments", on page 46.
Channel Power ACLR
ACLR measurements sweep the frequency spectrum instead of processing I/Q data.
The ACLR measurements evaluates the leakage ratio of neighboring channels and
evaluates if the signal is within the defined limits. The measurement provides several
result displays. You can combine the result displays in any way.
For more information on the result displays, see Chapter 3.7, "Frequency sweep mea-
surements", on page 43.
Remote command:
CONFigure[:NR5G]:MEASurement on page 250
SEM
SEM measurements sweep the frequency spectrum instead of processing I/Q data.
The SEM measurements tests the signal against a spectrum emission mask and eval-
uates if the signal is within the defined limits. The measurement provides several result
displays. You can combine the result displays in any way.
For more information on the result displays, see Chapter 3.7, "Frequency sweep mea-
surements", on page 43.
Remote command:
CONFigure[:NR5G]:MEASurement on page 250
3.2 Selecting result displays
Access:
The R&S FSV/A opens a menu (the SmartGrid) to select result displays. For more
information on the SmartGrid functionality, see the R&S FSV/A Getting Started.
In the default state of the application, it shows several conventional result displays.
●
Capture Buffer
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3.3 Performing measurements
Measurements and result displays
Result summary
●
EVM vs Carrier
●
Power Spectrum
●
Result Summary
●
Alloc ID vs Symbol x Carrier
●
Constellation Diagram
From that predefined state, add and remove result displays as you like from the SmartGrid menu.
Remote command: LAYout:ADD[:WINDow]? on page 176
By default, the application measures the signal continuously. In "Continuous Sweep"
mode, the R&S FSV/A captures and analyzes the data again and again.
●
For I/Q measurements, the amount of captured data depends on the capture time.
●
For frequency sweep measurement, the amount of captured data depends on the
sweep time.
In "Single Sweep" mode, the R&S FSV/A stops measuring after it has captured the
data once. The amount of data again depends on the capture time.
Refreshing captured data
You can also repeat a measurement based on the data that has already been captured
with the "Refresh" function. Repeating a measurement with the same data can be useful, for example, if you want to apply different modulation settings to the same I/Q data.
For more information, see the documentation of the R&S FSV/A.
3.4 Result summary
In addition to various graphical results, the R&S FSV/A provides a numerical result
summary for I/Q measurements. The result summary shows a multitude of results that
indicate the signal quality, combined in one table.
The result summary is split into several parts.
●
Frame statistics, which evaluate the metrics of the resource elements in a complete
frame.
Results are averaged over frames.
●
Slot and subframe statistics, which evaluate metrics of the resource elements in a
single slot or subframe.
Results are averaged over slots / subframes.
Each row in the table corresponds to a certain metric or result parameter. You can add
or remove results you want to display as necessary.
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Measurements and result displays
Result summary
By default, the R&S FSV/A evaluates the results over all captured frames, bandwidth
parts, subframes and slots. For most results, the result summary therefore contains a
mean (average), maximum and minimum value.
Limit check
The R&S FSV/A also tests several results against limits, if 3GPP has defined limits for
a result. Limits are only evaluated if the signal complies to the 3GPP specification
regarding the number of analyzed frames and the results are averaged over all frames.
Depending on the limit test, the results are highlighted.
●
If one of the results passes the limit, the value is highlighted green.
●
If one of the results violates the limit, the value is highlighted red.
●
Results that are not evaluated are not highlighted in a color.
For some results you can define custom limits. For more information, see Chapter 3.9,
"Reference: custom limits", on page 48.
You can check if a result supports limit evaluation in the result descriptions below. The
result descriptions also indicate special behavior of the limit check.
Evaluation range and multiple frame analysis
Unavailable for PRACH analysis.
The evaluation range selects the way the results are evaluated and which values are
displayed.
For the frame statistics, the evaluation range is irrelevant. However, you can select a
specific frame that you want to analyze.
●
Select "Frame Averaged" in the result summary header to display the average
result over all analyzed frames. The average results relate to all frames, not just
those in the capture buffer.
The table also shows the minimum and maximum values over the analyzed
frames.
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Result summary
●
Select "Selected Frame" in the result summary header to display the results for a
single frame.
If you analyze a single frame, the mean, minimum and maximum values are the
same.
For the slot statistics and subframe statistics, the effects of the evaluation range are
as follows.
●
Select "Frame Averaged" in the result summary header to display the average
results over all analyzed slots in all analyzed frames. The average results relate to
all frames, not just those in the capture buffer. The table also shows the minimum
and maximum values found in the analyzed frames.
When you select a specific BWP, subframe or slot while in "Frame Averaged"
mode, the R&S FSV/A automatically selects "Selected Frame" mode.
●
Select "Selected Frame" in the result summary header to display the results over
all analyzed slots in a single frame. The analyzed frame depends on the frame you
have selected. In this case, you can filter the evaluation range as you like.
Examples:
– If you select a specific BWP: the R&S FSV/A takes the average over all slots in
the selected BWP.
– If you select a specific subframe: the R&S FSV/A takes the average over all
slots in the selected subframe.
– If you select a specific slot: the R&S FSV/A shows the result for that slot.
Note that selecting a specific slot for the subframe results (frequency and sampling error) will not make a difference, because those results are always calculated over a complete subframe.
The current evaluation range is indicated in the header row of the slot statistics.
Multiple carrier analysis
Unavailable for PRACH analysis.
For measurements on multiple carriers, the contents of the result summary depend on
your configuration, especially the CC result setting.
●
Select "CC Result" = "All" to display information about all component carriers,
regardless of the number of component carriers.
– The "All" tab shows the average results for all component carriers. Each col-
umn in the table corresponds to one component carrier.
– The "View <x>" tabs show the detailed results for the component carriers
assigned to the two views.
●
Select "CC Result" = "Viewed" to display information about the component carriers
assigned to the two views.
– The "All" tab shows the average results for the two selected component carri-
ers. Depending on your selection in the result summary header, the results are
either averaged over all frames, or relate to a single frame.
– The "View <x>" tabs show the detailed results for the component carriers
assigned to the two views. Depending on your selection in the result summary
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Result summary
header, the results are either averaged over all frames, or relate to a single,
selected frame.
If you analyze only one frame, the results are the same in both cases.
Note that analyzing all component carriers is slower compared analyzing the viewed
component carriers, because of the post-processing that occurs during the analysis.
Thus, if time is an issue, you can select two component carriers to analyze, and, if you
are later interested in the characteristics of another component carrier, analyze that
component carrier later (the data of the other carriers is available, just not analyzed).
Units
Most of the units of the results are fixed.
The unit of the EVM results depends on the selected EVM unit.
Remote queries.............................................................................................................22
EVM PUSCH.................................................................................................................22
EVM DMRS PUSCH..................................................................................................... 23
EVM PUCCH.................................................................................................................24
EVM DMRS PUCCH.....................................................................................................24
BLER (%)...................................................................................................................... 24
TPUT (%)...................................................................................................................... 24
EVM PRACH.................................................................................................................25
Frame Start Offset.........................................................................................................25
EVM All......................................................................................................................... 25
EVM Peak..................................................................................................................... 25
EVM Phys Channel.......................................................................................................25
EVM Phys Signal.......................................................................................................... 26
Frequency Error............................................................................................................ 26
Sampling Error.............................................................................................................. 26
Power............................................................................................................................26
I/Q Offset.......................................................................................................................26
I/Q Gain Imbalance....................................................................................................... 27
I/Q Quadrature Error..................................................................................................... 27
Crest Factor.................................................................................................................. 27
Remote queries
The remote commands to query individual results and limit check results are indicated
in the description of the respective result.
Alternatively, you can query all results or limit check results at the same time using a
single command.
Remote command:
Results: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:ALL?
on page 190
Limit check: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:ALL:RESult? on page 217
EVM PUSCH
Shows the EVM for all PUSCH resource elements with a certain modulation in the analyzed frame (PI/2 BPSK, QPSK, 16QAM, 64QAM, 256QAM).
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Result summary
The values for resource elements with a PI/2 BPSK modulation is only calculated if you
turn on transform precoding.
When you turn on transform precoding, the allocations actually contain a PTRS. In that
case, the result summary also shows the combined EVM for PUSCH and PTRS.
Limit evaluation supported.
Unavailable for PRACH analysis.
Remote command:
PI/2 BPSK: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:
USPB[:AVERage]? on page 201
QPSK: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:USQP[:
AVERage]? on page 201
16QAM: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:USST[:
AVERage]? on page 203
64QAM: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:USSF[:
AVERage]? on page 202
256QAM: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:
USTS[:AVERage]? on page 203
Limit check PI/2 BPSK: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:USPB:MAXimum:RESult? on page 222
Limit check QPSK: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:USQP:MAXimum:RESult? on page 223
Limit check 16QAM: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:USST:MAXimum:RESult? on page 224
Limit check 64QAM: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:USSF:MAXimum:RESult? on page 224
Limit check 256QAM: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:USTS:MAXimum:RESult? on page 225
EVM DMRS PUSCH
Shows the EVM for all PUSCH DMRS resource elements with a certain modulation in
the analyzed frame (PI/2 BPSK, QPSK, 16QAM, 64QAM, 256QAM).
The values for resource elements with a PI/2 BPSK modulation is only calculated if you
turn on transform precoding.
Limit evaluation supported.
Unavailable for PRACH analysis.
Remote command:
PI/2 BPSK: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:
SDPB[:AVERage]? on page 196
QPSK: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:SDQP[:
AVERage]? on page 197
16QAM: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:SDST[:
AVERage]? on page 198
64QAM: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:SDSF[:
AVERage]? on page 198
256QAM: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:
SDTS[:AVERage]? on page 199
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Result summary
Limit check PI/2 BPSK: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:SDPB:MAXimum:RESult? on page 218
Limit check QPSK: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:SDQP:MAXimum:RESult? on page 219
Limit check 16QAM: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:SDST:MAXimum:RESult? on page 220
Limit check 64QAM: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:SDSF:MAXimum:RESult? on page 220
Limit check 256QAM: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:SDTS:MAXimum:RESult? on page 221
EVM PUCCH
Shows the EVM for all PUCCH resource elements in the analyzed frame.
Limit evaluation supported.
Unavailable for PRACH analysis.
Remote command:
Result: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:UCCH[:
AVERage]? on page 200
Limit check: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:UCCH:MAXimum:RESult? on page 222
EVM DMRS PUCCH
Shows the EVM for all PUSCH DMRS resource elements in the analyzed frame.
Unavailable for PRACH analysis.
Remote command:
Result: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:UCCD[:
AVERage]? on page 200
Limit check: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:UCCD:MAXimum:RESult? on page 221
BLER (%)
Shows the block error rate (BLER) for all code blocks used by the PUSCH as a percentage. The BLER is the ratio of the number of erroneously transmitted code blocks
to all code blocks in the analyzed frame.
Note that the result is only calculated if the number of bits per code block is identical
for all allocations.
To see the BLER results, you have turn on the throughput measurement.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:BLER[:AVERage]?
on page 193
TPUT (%)
Shows the throughput for all code blocks used by the PUSCH. The BLER is the ratio of
the number of successfully transmitted code blocks to all code blocks in the analyzed
frame.
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Result summary
Note that the result is only calculated if the number of bits per code block is identical
for all allocations.
To see the throughput results, you have turn on the throughput measurement.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:TPUT[:AVERage]?
on page 210
EVM PRACH
Shows the EVM for all PRACH resource elements in the captured signal.
Available for PRACH analysis.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:PRACh[:
AVERage]? on page 195
Frame Start Offset
Shows the start of the frame relative to the start of the capture buffer.
Unavailable for "Frame Averaged" results, otherwise refers to the selected frame.
For PRACH analysis, it shows the start of the preamble relative to the start of the cap-
ture buffer.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>]:SUMMary:TFRame? on page 211
EVM All
Shows the EVM for all resource elements in the selected evaluation range.
The result is a weighted average over all resource elements (PUSCH, DMRS etc.).
The number of occupied resource blocks and the number of used symbols of each
allocation is taken into account in the calculation of the mean EVM. Therefore, a fully
loaded PUSCH across multiple symbols gets a much higher weight than a single symbol DMRS.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM[:ALL][:
AVERage]? on page 193
EVM Peak
Shows the EVM of the resource element with the highest EVM value in the selected
evaluation range.
Unavailable for PRACH analysis.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:PEAK[:
AVERage]? on page 195
EVM Phys Channel
Shows the EVM for all physical channel resource elements in the selected evaluation
range.
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Result summary
A physical channel corresponds to a set of resource elements carrying information
from higher layers. PDSCH, PUSCH, PBCH or PDCCH, for example, are physical
channels.
Unavailable for PRACH analysis.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:EVM:PCHannel[:
AVERage]? on page 194
EVM Phys Signal
Shows the EVM for all physical signal resource elements in the selected evaluation
range.
The reference signal is a physical signal, for example.
Unavailable for PRACH analysis.
Frequency Error
Shows the difference in the measured center frequency and the reference center frequency.
The frequency error is calculated over a subframe.
The R&S FSV/A checks the measured frequency error against the limits defined by
3GPP. The values are highlighted green (pass) or red (fail) respectively. The color of
the mean value indicates the overall limit check passes or fails. Note that if you evaluate a single subframe only, the minimum, maximum and mean values are the same.
Remote command:
Result: FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:FERRor[:
AVERage]? on page 204
Limit check: CALCulate<n>:LIMit<li>[:CC<cc>][:ISRC<ant>][:
FRAMe<fr>]:SUMMary:EVM:FERRor[:AVERage]:RESult? on page 218
Sampling Error
Shows the difference in measured symbol clock and reference symbol clock relative to
the system sampling rate.
The sampling error is calculated over a subframe.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:SERRor[:AVERage]?
on page 208
Power
Shows the average time domain power for all resource elements in the selected evaluation range.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:POWer[:AVERage]?
on page 206
I/Q Offset
Shows the power at spectral line 0 normalized to the total transmitted power.
Not available for multiple BWPs.
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I/Q measurements
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:IQOFfset[:
AVERage]? on page 205
I/Q Gain Imbalance
Shows the logarithm of the gain ratio between the Q-channel and the I-channel.
Not available for multiple BWPs and only calculated if you turn on the calculation.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>][:FRAMe<fr>]:SUMMary:GIMBalance[:
AVERage]? on page 205
I/Q Quadrature Error
Shows the measure of the phase angle between Q-channel and I-channel deviating
from the ideal 90 degrees.
Not available for multiple BWPs and only calculated if you turn on the calculation.
Crest Factor
Shows the peak-to-average power ratio of the captured signal.
Unavailable for PRACH analysis.
Remote command:
FETCh[:CC<cc>][:ISRC<ant>]:SUMMary:CRESt[:AVERage]? on page 191
3.5 I/Q measurements
Access: [MEAS] > "EVM/Frequency Err/Power"
You can select the result displays from the evaluation bar and arrange them as you like
with the SmartGrid functionality.
Remote command:
Measurement selection: CONFigure[:NR5G]:MEASurement on page 250
Result display selection: LAYout:ADD[:WINDow]? on page 176
Capture Buffer...............................................................................................................28
EVM vs Carrier..............................................................................................................28
EVM vs Symbol.............................................................................................................29
EVM vs RB....................................................................................................................30
Frequency Error vs Symbol...........................................................................................31
Frequency Error vs Subframe.......................................................................................31
Power Spectrum............................................................................................................32
Inband Emission............................................................................................................33
Inband Emissions Summary......................................................................................... 34
Flatness.........................................................................................................................34
CCDF............................................................................................................................ 35
Constellation Diagram...................................................................................................36
Allocation Summary...................................................................................................... 37
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I/Q measurements
Bitstream.......................................................................................................................38
EVM vs Symbol x Carrier..............................................................................................39
Power vs Symbol x Carrier............................................................................................39
Allocation ID vs Symbol x Carrier..................................................................................40
Marker Table................................................................................................................. 40
Capture Buffer
The "Capture Buffer" shows the complete range of captured data for the last data capture.
The x-axis represents time. The maximum value of the x-axis is equal to the Capture
Time.
The y-axis represents the amplitude of the captured I/Q data in dBm (for RF input).
The capture buffer uses the auto peak detector to evaluate the measurement data. The
auto peak detector determines the maximum and the minimum value of the measured
levels for each measurement point and combines both values in one sample point.
Figure 3-1: Capture buffer without zoom
A green vertical line at the beginning of the green bar in the capture buffer represents
the frame start. The diagram also contains the "Start Offset" value. This value is the
time difference between the frame start and capture buffer start.
For PRACH analysis, the green line indicates the location of the preamble relative to
the start of the capture buffer ("Preamble Start Offset").
The header of the "Capture Buffer" result display contains an "I/Q Export" button that
allows you to export I/Q data easily.
Remote command:
Selection: LAY:ADD ? '1',LEFT,CBUF
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 248
Frame start offset: FETCh[:CC<cc>][:ISRC<ant>]:SUMMary:TFRame?
on page 211
EVM vs Carrier
The "EVM vs Carrier" result display shows the error vector magnitude (EVM) of the
subcarriers. With the help of a marker, you can use it as a debugging technique to
identify any subcarriers whose EVM is too high.
The results are based on an average EVM that is calculated over the resource elements for each subcarrier. This average subcarrier EVM is determined for each analyzed slot in the capture buffer.
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I/Q measurements
The contents of the result display depend on the evaluation range.
●
If you analyze all bandwidth parts (BWP), the result display contains a variable
number of traces that represent the bandwidth parts. The traces show the average
EVM of the corresponding signal part. The diagram header contains a legend that
shows the information that each trace carries.
●
If you analyze only one specific bandwidth part, or a single subframe, the diagram
contains three traces. The traces show the following information.
– The average subcarrier EVM over all slots in the selected signal part.
– The lowest subcarrier EVM over all slots in the selected signal part.
– The highest subcarrier EVM over all slots in the selected signal part.
●
If you analyze only a single slot, the diagram contains one trace. That trace shows
the subcarrier EVM for that slot only. Average, minimum and maximum values in
that case are the same.
The x-axis represents the center frequencies of the subcarriers. The y-axis shows the
EVM in % or in dB, depending on the EVM Unit.
Remote command:
Selection LAY:ADD ? '1',LEFT,EVCA
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 248
EVM vs Symbol
The "EVM vs Symbol" result display shows the error vector magnitude (EVM) of the
OFDM symbols. You can use it as a debugging technique to identify any symbols
whose EVM is too high.
The results are based on an average EVM that is calculated over the resource elements for each subcarrier. This average subcarrier EVM is determined for each analyzed slot in the capture buffer.
The contents of the result display depend on the evaluation range.
●
If you analyze all bandwidth parts (BWP), the result display contains a variable
number of traces that represent the bandwidth parts. The diagram header contains
a legend that shows the information that each trace carries.
●
If you analyze only one specific bandwidth part, a single subframe or a single slot,
the diagram contains one trace. That trace shows the average EVM of the symbols
in the selected signal part.
The x-axis represents the OFDM symbols, with each symbol represented by a dot on
the line. Any missing connections from one dot to another mean that the R&S FSV/A
could not determine the EVM for that symbol.
On the y-axis, the EVM is plotted either in % or in dB, depending on the EVM Unit.
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I/Q measurements
Remote command:
Selection: LAY:ADD ? '1',LEFT,EVSY
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 248
EVM vs RB
The "EVM vs RB" result display shows the Error Vector Magnitude (EVM) for all
resource blocks that can be occupied by the PDSCH.
The contents of the result display depend on the evaluation range.
●
If you analyze all bandwidth parts (BWP), the result display contains a variable
number of traces that represent the bandwidth parts. The traces show the average
EVM of the corresponding signal part. The diagram header contains a legend that
shows the information that each trace carries.
●
If you analyze only one specific bandwidth part, or a single subframe, the diagram
contains three traces. The traces show the following information.
– The average subcarrier EVM over all slots in the selected signal part.
– The lowest subcarrier EVM over all slots in the selected signal part.
– The highest subcarrier EVM over all slots in the selected signal part.
●
If you analyze only a single slot, the diagram contains one trace. That trace shows
the subcarrier EVM for that slot only. Average, minimum and maximum values in
that case are the same.
If you select and analyze one subframe only, the result display contains one trace that
shows the resource block EVM for that subframe only. Average, minimum and maximum values in that case are the same. For more information, see "Subframe Selec-
tion" on page 160.
The x-axis represents the PDSCH resource blocks. On the y-axis, the EVM is plotted
either in % or in dB, depending on the EVM Unit.
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