Rohde&Schwarz FSW-K106 User Manual

R&S®FSW-K106
LTE NB-IoT Measurement Application
(Downlink)
User Manual

(;ÜÉU2)

1178593702
Version 13

This manual applies to the following R&S®FSW models with firmware version 5.00 and later:

●

R&S®FSW8 (1331.5003K08 / 1312.8000K08)

●

R&S®FSW13 (1331.5003K13 / 1312.8000K13)

●

R&S®FSW26 (1331.5003K26 / 1312.8000K26)

●

R&S®FSW43 (1331.5003K43 / 1312.8000K43)

●

R&S®FSW50 (1331.5003K50 / 1312.8000K50)

●

R&S®FSW67 (1331.5003K67 / 1312.8000K67)

●

R&S®FSW85 (1331.5003K85 / 1312.8000K85)

The following firmware options are described:

●

R&S®FSW-K106 LTE NB-IoT Downlink Measurement Application (1331.6351.02)

© 2021 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: [phone] - 0
Email: [e-mail]
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.

1178.5937.02 | Version 13 | R&S®FSW-K106

Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®FSW is indicated as
R&S FSW.

R&S®FSW-K106

1 Preface.................................................................................................... 7

1.1 Documentation overview..............................................................................................7

1.1.1 Getting started manual....................................................................................................7

1.1.2 User manuals and help................................................................................................... 7

1.1.3 Service manual............................................................................................................... 8

1.1.4 Instrument security procedures.......................................................................................8

1.1.5 Printed safety instructions............................................................................................... 8

1.1.6 Data sheets and brochures............................................................................................. 8

1.1.7 Release notes and open-source acknowledgment (OSA).............................................. 8

1.1.8 Application notes, application cards, white papers, etc...................................................8

1.2 Conventions used in the documentation....................................................................9

Contents

Contents

1.2.1 Typographical conventions..............................................................................................9

1.2.2 Conventions for procedure descriptions..........................................................................9

1.2.3 Notes on screenshots..................................................................................................... 9

2 Welcome to the LTE NB-IoT measurement application....................10

2.1 Installation................................................................................................................... 10

2.2 Starting the LTE NB-IoT measurement application..................................................10

2.3 Understanding the display information.................................................................... 11

3 Measurements and result displays.................................................... 13

3.1 Selecting measurements............................................................................................13

3.2 Selecting result displays............................................................................................ 14

3.3 Performing measurements.........................................................................................15

3.4 Selecting the operating mode....................................................................................15

3.5 I/Q measurements....................................................................................................... 16

3.6 Time alignment error...................................................................................................29

3.7 Frequency sweep measurements..............................................................................30

4 Configuration........................................................................................34

4.1 Configuration overview.............................................................................................. 34

4.2 I/Q measurements....................................................................................................... 36

4.2.1 Defining signal characteristics.......................................................................................36

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4.2.2 Configuring MIMO setups............................................................................................. 40

4.2.3 Configuring the control channel.................................................................................... 41

4.2.4 Input source configuration.............................................................................................42

4.2.5 Frequency configuration................................................................................................48

4.2.6 Amplitude configuration.................................................................................................49

4.2.7 Configuring the data capture.........................................................................................52

4.2.8 Trigger configuration..................................................................................................... 54

4.2.9 Parameter estimation and tracking............................................................................... 55

4.2.10 Configuring demodulation parameters.......................................................................... 57

4.2.11 Automatic configuration.................................................................................................58

4.3 Time alignment error measurements........................................................................ 58

4.4 Frequency sweep measurements..............................................................................59

4.4.1 ACLR signal description................................................................................................59

Contents

4.4.2 SEM signal description..................................................................................................60

5 Analysis................................................................................................ 62

5.1 General analysis tools................................................................................................ 62

5.1.1 Data export....................................................................................................................62

5.1.2 Microservice export....................................................................................................... 63

5.1.3 Diagram scale............................................................................................................... 63

5.1.4 Zoom............................................................................................................................. 64

5.1.5 Markers......................................................................................................................... 64

5.2 Analysis tools for I/Q measurements........................................................................65

5.2.1 Layout of numerical results........................................................................................... 65

5.2.2 Evaluation range........................................................................................................... 66

5.2.3 Result settings...............................................................................................................68

5.3 Analysis tools for frequency sweep measurements............................................... 68

6 Remote control.....................................................................................70

6.1 Common suffixes........................................................................................................ 70

6.2 Introduction................................................................................................................. 71

6.2.1 Conventions used in descriptions................................................................................. 71

6.2.2 Long and short form...................................................................................................... 72

6.2.3 Numeric suffixes............................................................................................................72

6.2.4 Optional keywords.........................................................................................................73

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6.2.5 Alternative keywords..................................................................................................... 73

6.2.6 SCPI parameters...........................................................................................................73

6.3 NB-IoT application selection......................................................................................76

6.4 Screen layout...............................................................................................................80

6.4.1 General layout...............................................................................................................80

6.4.2 Layout of a single channel............................................................................................ 81

6.5 Measurement control..................................................................................................89

6.5.1 Measurements.............................................................................................................. 89

6.5.2 Measurement sequences..............................................................................................91

6.6 Trace data readout...................................................................................................... 93

6.6.1 The TRACe[:DATA] command...................................................................................... 93

6.6.2 Result readout.............................................................................................................103

6.7 Numeric result readout.............................................................................................104

Contents

6.7.1 Result for selection......................................................................................................104

6.7.2 Time alignment error................................................................................................... 110

6.7.3 Marker table.................................................................................................................111

6.7.4 CCDF table..................................................................................................................114

6.8 Configuration.............................................................................................................115

6.8.1 General configuration.................................................................................................. 115

6.8.2 I/Q measurements.......................................................................................................117

6.8.3 Time alignment error measurements.......................................................................... 151

6.8.4 Frequency sweep measurements............................................................................... 152

6.9 Analysis..................................................................................................................... 154

6.9.1 Trace export................................................................................................................ 154

6.9.2 Microservice export..................................................................................................... 156

6.9.3 Evaluation range......................................................................................................... 156

6.9.4 Y-axis scale................................................................................................................. 159

6.9.5 Result settings.............................................................................................................160

Annex.................................................................................................. 162

A Performing time alignment measurements..................................... 162

List of commands (NB-IoT downlink)...............................................163

Index....................................................................................................167

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Contents

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1 Preface

1.1 Documentation overview

1.1.1 Getting started manual

Preface

Documentation overview

This chapter provides safety-related information, an overview of the user documenta­tion and the conventions used in the documentation.

This section provides an overview of the R&S FSW user documentation. Unless speci­fied otherwise, you find the documents on the R&S FSW product page at:

www.rohde-schwarz.com/manual/FSW

Introduces the R&S FSW 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.

1.1.2 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 FSW is not
included.

The contents of the user manuals are available as help in the R&S FSW. 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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1.1.3 Service manual

1.1.4 Instrument security procedures

1.1.5 Printed safety instructions

Preface

Documentation overview

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):

https://gloris.rohde-schwarz.com

Deals with security issues when working with the R&S FSW in secure areas. It is avail­able for download on the Internet.

Provides safety information in many languages. The printed document is delivered with
the product.

1.1.6 Data sheets and brochures

The data sheet contains the technical specifications of the R&S FSW. 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/FSW

1.1.7 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 open-source acknowledgment document provides verbatim license texts of the
used open source software.

See www.rohde-schwarz.com/firmware/FSW

1.1.8 Application notes, application cards, white papers, etc.

These documents deal with special applications or background information on particu­lar topics.

See www.rohde-schwarz.com/application/FSW

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1.2 Conventions used in the documentation

1.2.1 Typographical conventions

Preface

Conventions used in the documentation

The following text markers are used throughout this documentation:

Convention Description

"Graphical user interface ele­ments"

[Keys] Key and knob names are enclosed by square brackets.

Filenames, commands,
program code

Input Input to be entered by the user is displayed in italics.

Links Links that you can click are displayed in blue font.

"References" References to other parts of the documentation are enclosed by quota-

All names of graphical user interface elements on the screen, such as
dialog boxes, menus, options, buttons, and softkeys are enclosed by
quotation marks.

Filenames, commands, coding samples and screen output are distin­guished by their font.

tion marks.

1.2.2 Conventions for procedure descriptions

When operating the instrument, several alternative methods may be available to per­form the same task. In this case, the procedure using the touchscreen is described.
Any elements that can be activated by touching can also be clicked using an addition­ally connected mouse. The alternative procedure using the keys on the instrument or
the on-screen keyboard is only described if it deviates from the standard operating pro­cedures.

The term "select" may refer to any of the described methods, i.e. using a finger on the
touchscreen, a mouse pointer in the display, or a key on the instrument or on a key­board.

1.2.3 Notes on screenshots

When describing the functions of the product, we use sample screenshots. These
screenshots are meant to illustrate as many as possible of the provided functions and
possible interdependencies between parameters. The shown values may not represent
realistic usage scenarios.

The screenshots usually show a fully equipped product, that is: with all options instal­led. Thus, some functions shown in the screenshots may not be available in your par­ticular product configuration.

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2 Welcome to the LTE NB-IoT measurement

Welcome to the LTE NB-IoT measurement application

Starting the LTE NB-IoT measurement application

application

The LTE NB-IoT measurement application is a firmware application that adds function­ality to measure on NB-IoT signals according to the 3GPP standard to the R&S FSW.

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 FSW
user manual. The latest versions of the manuals are available for download at the
product homepage.

https://www.rohde-schwarz.com/manual/fsw.

● Installation...............................................................................................................10

● Starting the LTE NB-IoT measurement application.................................................10

● Understanding the display information....................................................................11

2.1 Installation

Find detailed installing instructions in the getting started or the release notes of the
R&S FSW.

2.2 Starting the LTE NB-IoT measurement application

The LTE NB-IoT measurement application adds a new application to the R&S FSW.

Starting the NB-IoT application

1. Press the [MODE] key on the front panel of the R&S FSW.
A dialog box opens that contains all operating modes and applications currently

available on your R&S FSW.

2. Select the "NB-IoT" item.

The R&S FSW opens a new measurement channel for the NB-IoT measurement
application.

The application is started with the default settings. It can be configured in the "Over­view" dialog box, which is displayed when you select the "Overview" softkey from the
"Meas Setup" menu.

For more information, see Chapter 4, "Configuration", on page 34.

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2.3 Understanding the display information

Welcome to the LTE NB-IoT measurement application

Understanding the display information

The following figure shows a measurement diagram during NB-IoT operation. All differ­ent information areas are labeled. They are explained in more detail in the following
sections.

1 2 3 4 5 6

1 = Toolbar
2 = Channel bar
3 = Diagram header
4 = Result display
5 = Status bar
6 = Softkeys

Channel bar information

In the LTE NB-IoT measurement application, the R&S FSW shows the following set­tings:

Table 2-1: Information displayed in the channel bar in the NB-IoT measurement application

Ref Level Reference level

Att Mechanical and electronic RF attenuation

Offset Reference level offset

Freq

E-UTRA Freq

Mode NB-IoT standard

MIMO Number of Tx and Rx antennas in the measurement setup

Frequency
Center frequency of the LTE channel (in-band deployment only)

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Welcome to the LTE NB-IoT measurement application

Understanding the display information

Capture Time Length of the signal that has been captured

Frame Count Number of frames that have been captured

Subframe Subframe considered in the signal analysis

In addition, the channel bar 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 trigger settings). This information is displayed only
when applicable for the current measurement. For details, see the R&S FSW getting
started manual.

Window title bar information

The information in the window title bar depends on the result display.

The "Constellation Diagram", for example, shows the number of points that have been
measured.

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.
There can be three different synchronization errors.

– "Sync Failed (Cyclic Prefix)": The cyclic prefix correlation failed.
– "Sync Failed (NPSS)": The NPSS correlation failed.
– "Sync Failed (NSSS)": The NSSS correlation failed.

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3 Measurements and result displays

Measurements and result displays

Selecting measurements

The LTE NB-IoT measurement application measures and analyzes various aspects of
an NB-IoT signal.

It features several measurements and result displays. Measurements represent differ­ent ways of processing the captured data during the digital signal processing. Result
displays are different representations of the measurement results. They can be dia­grams that show the results as a graph or tables that show the results as numbers.

Remote command:

Measurement selection: CONFigure[:LTE]:MEASurement on page 116

Result display selection: LAYout:ADD[:WINDow]? on page 82

● Selecting measurements.........................................................................................13

● Selecting result displays..........................................................................................14

● Performing measurements......................................................................................15

● Selecting the operating mode................................................................................. 15

● I/Q measurements...................................................................................................16

● Time alignment error...............................................................................................29

● Frequency sweep measurements...........................................................................30

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 14.

Depending on the measurement, the R&S FSW 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 NB-IoT 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 16.
Remote command:

CONFigure[:LTE]:MEASurement on page 116

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Measurements and result displays

Selecting result displays

Time alignment error

Time alignment error (TAE) measurements record, process and demodulate the sig­nal's I/Q data. The result displays available for TAE measurements indicate how well
the antennas in a multi-antenna system are aligned.

For TAE measurements, you can combine the result displays in any way.
For more information on the result displays, see Chapter 3.6, "Time alignment error",

on page 29.
Remote command:

CONFigure[:LTE]:MEASurement on page 116

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 30.

Remote command:

CONFigure[:LTE]:MEASurement on page 116

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 30.

Remote command:

CONFigure[:LTE]:MEASurement on page 116

3.2 Selecting result displays

Access:

The R&S FSW opens a menu (the SmartGrid) to select result displays. For more infor­mation on the SmartGrid functionality, see the R&S FSW Getting Started.

In the default state of the application, it shows several conventional result displays.

●

Capture Buffer

●

Power vs Symbol X Carrier

●

Constellation Diagram

●

Power Spectrum

●

Result Summary

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3.3 Performing measurements

Measurements and result displays

Selecting the operating mode

From that predefined state, add and remove result displays as you like from the Smart­Grid menu.

Remote command: LAYout:ADD[:WINDow]? on page 82

By default, the application measures the signal continuously. In "Continuous Sweep"
mode, the R&S FSW 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 FSW 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 FSW.

3.4 Selecting the operating mode

Access: [MODE] > "Multi-Standard Radio Analyzer Tab"

The NB-IoT application is supported by the Multi Standard Radio Analyzer (MSRA).

The MSRA mode supports all I/Q measurements and result displays available with the
NB-IoT application, except the frequency sweep measurements (SEM and ACLR).

In MSRA operating mode, only the MSRA primary actually captures data. The applica­tion receives an extract of the captured data for analysis, referred to as the application
data. The application data range is defined by the same settings used to define the
signal capture in "Signal and Spectrum Analyzer" mode. In addition, a capture offset
can be defined, i.e. an offset from the start of the captured data to the start of the
analysis interval.

If a signal contains multiple data channels for multiple standards, separate applications
are used to analyze each data channel. Thus, it is of interest to know which application
is analyzing which data channel. The MSRA primary display indicates the data covered
by each application by vertical blue lines labeled with the application name. The blue
lines correspond to the channel bandwidth.

However, the individual result displays of the application need not analyze the com­plete data range. The data range that is actually analyzed by the individual result dis­play is referred to as the analysis interval.

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Measurements and result displays

I/Q measurements

The analysis interval is automatically determined according to the Capture Time you
have defined. The analysis interval cannot be edited directly in the NB-IoT application,
but is changed automatically when you change the evaluation range. The currently
used analysis interval (in seconds, related to capture buffer start) is indicated in the
window header for each result display.

A frequent question when analyzing multi-standard signals is how each data channel is
correlated (in time) to others. Thus, an analysis line has been introduced. The analysis
line is a common time marker for all MSRA secondary applications. It can be posi­tioned in any MSRA secondary application or the MSRA primary and is then adjusted
in all other secondary applications. Thus, you can easily analyze the results at a spe­cific time in the measurement in all secondary applications and determine correlations.

If the marked point in time is contained in the analysis interval of the secondary appli­cation, the line is indicated in all time-based result displays, such as time, symbol, slot
or bit diagrams. By default, the analysis line is displayed, however, it can be hidden
from view manually. In all result displays, the "AL" label in the window title bar indicates
whether the analysis line lies within the analysis interval or not:

●

orange "AL": the line lies within the interval

●

white "AL": the line lies within the interval, but is not displayed (hidden)

●

no "AL": the line lies outside the interval

For details on the MSRA operating mode, see the R&S FSW MSRA documentation.

3.5 I/Q measurements

Access: "Overview" > "Select Measurement" > "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[:LTE]:MEASurement on page 116

Result display selection: LAYout:ADD[:WINDow]? on page 82

Capture Buffer...............................................................................................................17

EVM vs Carrier..............................................................................................................18

EVM vs Symbol.............................................................................................................19

EVM vs Subframe......................................................................................................... 20

Frequency Error vs Symbol...........................................................................................20

Power Spectrum............................................................................................................21

Channel Flatness.......................................................................................................... 21

Group Delay..................................................................................................................22

Channel Flatness Difference.........................................................................................22

Constellation Diagram...................................................................................................22

CCDF............................................................................................................................ 23

Allocation Summary...................................................................................................... 24

EVM vs Symbol x Carrier..............................................................................................25

Power vs Symbol x Carrier............................................................................................25

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Measurements and result displays

I/Q measurements

Allocation ID vs Symbol x Carrier..................................................................................26

Result Summary............................................................................................................26

Marker Table................................................................................................................. 28

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).

Figure 3-1: Capture buffer without zoom

A colored bar at the bottom of the diagram represents the frame that is currently ana­lyzed. Different colors indicate the OFDM symbol type.

●

Indicates the data stream.

●

Indicates the reference signal and data.

●

Indicates the NPSS and data.

●

Indicates the NSSS and data.

A green vertical line at the beginning of the green bar in the capture buffer represents
the subframe start. The diagram also contains the "Start Offset" value. This value is the
time difference between the subframe start and capture buffer start.

When you zoom into the diagram, you will see that the bar is interrupted at certain
positions. Each small bar indicates the useful parts of the OFDM symbol.

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Measurements and result displays

I/Q measurements

Figure 3-2: Capture buffer after a zoom has been applied

Remote command:
Selection: LAY:ADD ? '1',LEFT,CBUF
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102
Subframe start offset: FETCh[:CC<cc>]:SUMMary:TFRame? on page 109

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 subframe in the capture buffer.

If you analyze all subframes, the result display contains three traces.

●

Average EVM
This trace shows the subcarrier EVM, averaged over all subframes.

●

Minimum EVM
This trace shows the lowest (average) subcarrier EVM that has been found over
the analyzed subframes.

●

Maximum EVM
This trace shows the highest (average) subcarrier EVM that has been found over
the analyzed subframes.

If you select and analyze one subframe only, the result display contains one trace that
shows the subcarrier EVM for that subframe only. Average, minimum and maximum
values in that case are the same. For more information, see "Subframe Selection"
on page 66.

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.

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Measurements and result displays

I/Q measurements

Remote command:
Selection LAY:ADD ? '1',LEFT,EVCA
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

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 all subcarriers that
are part of a certain OFDM symbol. This average OFDM symbol EVM is determined for
all OFDM symbols in each analyzed subframe.

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 FSW
could not determine the EVM for that symbol.

The number of displayed symbols depends on the subframe selection.
On the y-axis, the EVM is plotted either in % or in dB, depending on the EVM Unit.

Remote command:
Selection: LAY:ADD ? '1',LEFT,EVSY
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

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Measurements and result displays

I/Q measurements

EVM vs Subframe

The "EVM vs Subframe" result display shows the Error Vector Magnitude (EVM) for
each subframe. You can use it as a debugging technique to identify a subframe whose
EVM is too high.

The result is an average over all subcarriers and symbols of a specific subframe.
The x-axis represents the subframes, with the number of displayed subframes being

10.

On the y-axis, the EVM is plotted either in % or in dB, depending on the EVM Unit.

Remote command:
Selection: LAY:ADD ? '1',LEFT,EVSU
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

Frequency Error vs Symbol

Th e "Frequency Error vs Symbol" result display shows the frequency error of each
symbol. You can use it as a debugging technique to identify any frequency errors within
symbols.

The result is an average over all subcarriers in the symbol.
On the y-axis, the frequency error is plotted in Hz.
Note that the variance of the measurement results in this result display can be much

higher compared to the frequency error display in the numerical result summary,
depending on the NPDSCH and control channel configuration. The potential difference
is caused by the number of available resource elements for the measurement on sym­bol level.

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R&S®FSW-K106

Measurements and result displays

I/Q measurements

Remote command:
Selection: LAY:ADD ? '1',LEFT,FEVS
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

Power Spectrum

The "Power Spectrum" shows the power density of the complete capture buffer in
dBm/Hz.

The displayed bandwidth is always 7.68 MHz.
The x-axis represents the frequency. On the y-axis, the power level is plotted.

Remote command:
Selection: LAY:ADD ? '1',LEFT,PSPE
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

Channel Flatness

The "Channel Flatness" shows the relative power offset caused by the transmit chan­nel.

The currently selected subframe depends on your selection.
The x-axis represents the frequency. On the y-axis, the channel flatness is plotted in

dB.

Remote command:
Selection: LAY:ADD ? '1',LEFT,FLAT
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

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R&S®FSW-K106

Measurements and result displays

I/Q measurements

Group Delay

This "Group Delay" shows the group delay of each subcarrier.
The measurement is evaluated over the currently selected slot in the currently selected

subframe.
The currently selected subframe depends on your selection.
The x-axis represents the frequency. On the y-axis, the group delay is plotted in ns.

Remote command:
Selection: LAY:ADD ? '1',LEFT,GDEL
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

Channel Flatness Difference

The "Channel Flatness Difference" shows the level difference in the spectrum flatness
result between two adjacent physical subcarriers.

The currently selected subframe depends on your selection.
The x-axis represents the frequency. On the y-axis, the power is plotted in dB.

Remote command:
Selection: LAY:ADD ? '1',LEFT,FDIF
Query (y-axis): TRACe:DATA?
Query (x-axis): TRACe<n>[:DATA]:X? on page 102

Constellation Diagram

The "Constellation Diagram" shows the in-phase and quadrature phase results and is
an indicator of the quality of the modulation of the signal.

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Measurements and result displays

I/Q measurements

In the default state, the result display evaluates the full range of the measured input
data.

Each color represents a modulation type.

●

●

●

●

●

You can filter the results by changing the evaluation range.

: BPSK
: RBPSK
: MIXTURE
: QPSK
: PSK (CAZAC)

The constellation diagram also contains information about the current evaluation

range, including the number of points that are displayed in the diagram.

Remote command:
Selection: LAY:ADD ? '1',LEFT,CONS
Query: TRACe:DATA?

CCDF

The "Complementary Cumulative Distribution Function (CCDF)" shows the probability
of an amplitude exceeding the mean power. For the measurement, the complete cap­ture buffer is used.

The x-axis represents the power relative to the measured mean power. On the y-axis,
the probability is plotted in %.

In addition to the diagram, the results for the CCDF measurement are summarized in
the CCDF table.

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Measurements and result displays

I/Q measurements

Mean Mean power

Peak Peak power

Crest Crest factor (peak power – mean power)

10 % 10 % probability that the level exceeds mean power + [x] dB

1 % 1 % probability that the level exceeds mean power + [x] dB

0.1 % 0.1 % probability that the level exceeds mean power + [x] dB

0.01 % 0.01 % probability that the level exceeds mean power + [x] dB

Remote command:
Selection: LAY:ADD ? '1',LEFT,CCDF
Query (y-axis): TRACe:DATA?
Numerical results: CALCulate<n>:STATistics:CCDF:X<t>? on page 114
Numerical results: CALCulate<n>:STATistics:RESult<res>? on page 115

Allocation Summary

The "Allocation Summary" shows various parameters of the measured allocations in a
table.

Each row in the allocation table corresponds to an allocation. A set of several alloca­tions make up a subframe. A horizontal line indicates the beginning of a new subframe.

Special allocations summarize the characteristics of all allocations in a subframe
("ALL") and the complete frame (allocation "ALL" at the end of the table).

The columns of the table show the following properties for each allocation.

●

The location of the allocation (subframe number).

●

The ID of the allocation (channel type).

●

Number of resource blocks used by the allocation.

●

The relative power of the allocation in dB.

●

The modulation of the allocation.

●

The power of each resource element in the allocation in dBm.

●

The EVM of the allocation.
The unit depends on the EVM unit

●

The EVM over all codewords in a layer. The layer EVM is calculated for all data
allocations, and not for the DMRS or other physical signals.
The unit depends on the EVM unit

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R&S®FSW-K106

Measurements and result displays

I/Q measurements

Remote command:
Selection: LAY:ADD ? '1',LEFT,ASUM
Query: TRACe:DATA?

EVM vs Symbol x Carrier

The "EVM vs Symbol x Carrier" result display shows the EVM for each carrier in each
symbol.

The x-axis represents the symbols. The y-axis represents the subcarriers. Different col­ors in the diagram area represent the EVM. A color map in the diagram header indi­cates the corresponding power levels.

Remote command:
Selection: LAY:ADD ? '1',LEFT,EVSC
Query: TRACe:DATA?

Power vs Symbol x Carrier

The "Power vs Symbol x Carrier" result display shows the power for each carrier in
each symbol.

The x-axis represents the symbols. The y-axis represents the subcarriers. Different col­ors in the diagram area represent the power. A color map in the diagram header indi­cates the corresponding power levels.

Remote command:
Selection: LAY:ADD ? '1',LEFT,PVSC
Query: TRACe:DATA?

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Measurements and result displays

I/Q measurements

Allocation ID vs Symbol x Carrier

The "Allocation ID vs Symbol x Carrier" result display is a graphical representation of
the structure of the analyzed frame. It shows the allocation type of each subcarrier in
each symbol of the received signal.

The x-axis represents the OFDM symbols. The y-axis represents the subcarriers.
Each type of allocation is represented by a different color. The legend above the dia-

gram indicates the colors used for each allocation. You can also use a marker to get
more information about the type of allocation.

Remote command:
Selection: LAY:ADD ? '1',LEFT,AISC
Query: TRACe:DATA?

Result Summary

The Result Summary shows all relevant measurement results in numerical form, com­bined in one table.

Remote command:

LAY:ADD ? '1',LEFT,RSUM

Contents of the result summary

The table shows results that refer to the complete frame. For each result, the minimum,
mean and maximum values are displayed. It also indicates limit values as defined in
the NB-IoT standard and limit check results where available. The font of 'Pass' results
is green and that of 'Fail' results is red.

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Measurements and result displays

I/Q measurements

In addition to the red font, the application also puts a red star ( ) in front of
failed results.

By default, all EVM results are in %. To view the EVM results in dB, change the EVM

Unit.

The second part of the table shows results that refer to a specific selection of the
frame.

The statistic is always evaluated over the subframes.
The header row of the table contains information about the selection you have made

(like the subframe).

EVM All Shows the EVM for all resource elements in the analyzed frame.

FETCh[:CC<cc>]:SUMMary:EVM[:ALL][:AVERage]? on page 105

EVM Phys Channel Shows the EVM for all physical channel resource elements in the analyzed

frame.
A physical channel corresponds to a set of resource elements carrying infor-

mation from higher layers. NPDSCH, NPBCH or NPDCCH, for example, are
physical channels. For more information, see 3GPP 36.211.

FETCh[:CC<cc>]:SUMMary:EVM:PCHannel[:AVERage]? on page 106

EVM Phys Signal Shows the EVM for all physical signal resource elements in the analyzed

frame.
The reference signal, for example, is a physical signal. For more information,

see 3GPP 36.211.

FETCh[:CC<cc>]:SUMMary:EVM:PSIGnal[:AVERage]? on page 106

Frequency Error Shows the difference in the measured center frequency and the reference

center frequency.

FETCh[:CC<cc>]:SUMMary:FERRor[:AVERage]? on page 106

Sampling Error Shows the difference in measured symbol clock and reference symbol clock

relative to the system sampling rate.

FETCh[:CC<cc>]:SUMMary:SERRor[:AVERage]? on page 109

RSTP Shows the reference signal transmit power as defined in 3GPP TS 36.141. It

is required for the "DL RS Power" test.
It is an average power and accumulates the powers of the reference symbols

within a subframe divided by the number of reference symbols within a sub­frame.

FETCh[:CC<cc>]:SUMMary:RSTP[:AVERage]? on page 109

OSTP Shows the OFDM symbol transmit power as defined in 3GPP TS 36.141.

It accumulates all subcarrier powers of the 4th OFDM symbol. The 4th (out of
14 OFDM symbols within a subframe (for frame type 1, normal CP length))
contains exclusively NPDSCH.

FETCh[:CC<cc>]:SUMMary:OSTP[:AVERage]? on page 107

RSSI Shows the Received Signal Strength Indicator. The RSSI is the complete sig-

nal power of the channel that has been measured, regardless of the origin of
the signal.

FETCh[:CC<cc>]:SUMMary:RSSI[:AVERage]? on page 108

Power Shows the average time domain power of the analyzed signal.

FETCh[:CC<cc>]:SUMMary:POWer[:AVERage]? on page 107

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Measurements and result displays

I/Q measurements

NB-IoT Power Shows the power of all resource elements used by NB-IoT.

FETCh[:CC<cc>]:SUMMary:NBPower[:AVERage]? on page 108

Crest Factor Shows the peak-to-average power ratio of captured signal.

FETCh[:CC<cc>]:SUMMary:CRESt[:AVERage]? on page 105

Marker Table

Displays a table with the current marker values for the active markers.
This table is displayed automatically if configured accordingly.

Wnd Shows the window the marker is in.

Type Shows the marker type and number ("M" for a nor-

mal marker, "D" for a delta marker).

Trc Shows the trace that the marker is positioned on.

Ref Shows the reference marker that a delta marker

refers to.

X- / Y-Value Shows the marker coordinates (usually frequency

and level).

Z-EVM

Z-Power

Z-Alloc ID

Shows the EVM, power and allocation type at the
marker position.

Only in 3D result displays (for example "EVM vs
Symbol x Carrier").

Tip: To navigate within long marker tables, simply scroll through the entries with your
finger on the touchscreen.

Remote command:
LAY:ADD? '1',RIGH, MTAB, see LAYout:ADD[:WINDow]? on page 82
Results:

CALCulate<n>:MARKer<m>:X on page 112
CALCulate<n>:MARKer<m>:Y on page 112
CALCulate<n>:MARKer<m>:Z? on page 113
CALCulate<n>:MARKer<m>:Z:ALL? on page 113

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3.6 Time alignment error

Measurements and result displays

Time alignment error

Access: "Overview" > "Select Measurement" > "Time Alignment"

The time alignment error measurement captures and analyzes new I/Q data when you
select it.

The time alignment error measurement only works under the following conditions:

●

It is only available in a MIMO setup (2 antennas).
Therefore, you have to mix the signal of the antennas into one cable that you can
connect to the R&S FSW. For more information on configuring and performing a
time alignment measurement, see Chapter A, "Performing time alignment mea-

surements", on page 162.

●

It is only available for the stand alone deployment.

In addition to the result displays mentioned in this section, the time alignment measure­ment also supports the following result displays described elsewhere.

●

"Capture Buffer" on page 17

●

"Power Spectrum" on page 21

●

"Marker Table" on page 28

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[:LTE]:MEASurement on page 116

Result display selection: LAYout:ADD[:WINDow]? on page 82

Time Alignment Error.................................................................................................... 29

Time Alignment Error

The time alignment is an indicator of how well the transmission antennas in a MIMO
system are synchronized. The time alignment error is the time delay between a refer­ence antenna (for example antenna 1) and another antenna.

The application shows the results in a table.
Each row in the table represents one antenna. The reference antenna is not shown.
For each antenna, the maximum, minimum and average time delay that has been

measured is shown. The minimum and maximum results are calculated only if the
measurement covers more than one subframe.

In any case, results are only displayed if the transmission power of both antennas is
within 15 dB of each other. Likewise, if only one antenna transmits a signal, results will
not be displayed (for example if the cabling on one antenna is faulty).

For more information on configuring this measurement, see Chapter 4.3, "Time align-

ment error measurements", on page 58.

The "Limit" value shown in the result display is the maximum time delay that may occur
for each antenna (only displayed for systems without carrier aggregation).

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Measurements and result displays

Frequency sweep measurements

You can select the reference antenna from the dropdown menu in the result display.
You can also select the reference antenna in the MIMO Setup - if you change them in
one place, they are also changed in the other.

In the default layout, the application also shows the "Capture Buffer" and "Power Spec­trum" result displays for each component carrier.

Remote command:
Selection: LAY:ADD ? '1',LEFT,TAL
Query: FETCh:TAERror[:CC<cc>]:ANTenna<ant>[:AVERage]? on page 110
Reference antenna: CONFigure[:LTE]:DL[:CC<cc>]:MIMO:ASELection
on page 123

3.7 Frequency sweep measurements

Access (ACLR): "Meas Setup" > "Select Measurement" > "Channel Power ACLR"

Access (SEM): "Meas Setup" > "Select Measurement" > "Spectrum Emission Mask"

The NB-IoT aplication supports the following frequency sweep measurements.

●

Adjacent channel leakage ratio (ACLR)

●

Spectrum emission mask (SEM)

Instead of using I/Q data, the frequency sweep measurements sweep the spectrum
every time you run a new measurement. Therefore, it is mandatory to feed a signal into
the RF input for these measurements. Using previously acquired I/Q data for the fre­quency sweep measurements is not possible (and vice-versa).

Because each of the frequency sweep measurements uses different settings to obtain
signal data it is also not possible to run a frequency sweep measurement and view the
results in another frequency sweep measurement.

Make sure to have sufficient bandwidth to be able to capture the whole signal, includ­ing neighboring channels.

Features of the frequency sweep measurements:

●

Frequency sweep measurements are only available for the stand alone deploy-

ment.

In addition to the specific diagrams and table (see description below), frequency sweep
measurements support the following result displays.

●

"Marker Table" on page 28

●

Marker peak list
Both result displays have the same contents as the spectrum application.

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Measurements and result displays

Frequency sweep measurements

Remote command:

Measurement selection: CONFigure[:LTE]:MEASurement on page 116

Result display selection: LAYout:ADD[:WINDow]? on page 82

Adjacent Channel Leakage Ratio (ACLR).....................................................................31

└ Result diagram................................................................................................31

└ Result summary..............................................................................................31

Spectrum Emission Mask (SEM).................................................................................. 32

└ Result diagram................................................................................................32

└ Result summary..............................................................................................32

Marker Peak List........................................................................................................... 33

Adjacent Channel Leakage Ratio (ACLR)

The adjacent channel leakage ratio (ACLR) measurement is designed to analyze sig­nals that contain multiple signals for different radio standards. Using the ACLR mea­surement, you can determine the power of the transmit (Tx) channel and the power of
the neighboring (adjacent) channels to the left and right of the Tx channel. Thus, the
ACLR measurement provides information about the power in the adjacent channels as
well as the leakage into these adjacent channels.

When you measure the ACLR in the NB-IoT application, the R&S FSW automatically
selects appropriate ACLR settings based on the selected channel bandwidth.

For a comprehensive description of the ACLR measurement, refer to the user manual
of the R&S FSW.

Remote command:
Selection: CONF:MEAS ACLR

Result diagram ← Adjacent Channel Leakage Ratio (ACLR)

The result diagram is a graphic representation of the signals with a trace that shows
the measured signal. Individual channels (Tx and adjacent channels) are indicated by
vertical lines and corresponding labels.

In addition, the R&S FSW highlights the channels (blue: Tx channel, green: adjacent
channels).

The x-axis represents the frequency with a frequency span that relates to the specified
NB-IoT channel and adjacent channel bandwidths. On the y-axis, the power is plotted
in dBm.

The power for the Tx channel is an absolute value in dBm. The power of the adjacent
channels is relative to the power of the Tx channel.

In addition, the R&S FSW tests the ACLR measurement results against the limits
defined by 3GPP.

Remote command:
Result query: TRACe:DATA?

Result summary ← Adjacent Channel Leakage Ratio (ACLR)

The result summary shows the signal characteristics in numerical form. Each row in
the table corresponds to a certain channel type (Tx, adjacent channel). The columns
contain the channel characteristics.

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Measurements and result displays

Frequency sweep measurements

●

Channel

Shows the channel type (Tx, adjacent or alternate channel).

●

Bandwidth

Shows the channel bandwidth.

●

Offset

Shows the channel spacing.

●

Power

Shows the power of the Tx channel.

●

Lower / Upper

Shows the relative power of the lower and upper adjacent and alternate channels.
The values turn red if the power violates the limits.

Remote command:
Result query: CALCulate<n>:MARKer<m>:FUNCtion:POWer<sb>:RESult[:

CURRent]?

Spectrum Emission Mask (SEM)

The "Spectrum Emission Mask" (SEM) measurement shows the quality of the mea­sured signal by comparing the power values in the frequency range near the carrier
against a spectral mask that is defined by the 3GPP specifications. In this way, you can
test the performance of the DUT and identify the emissions and their distance to the
limit.

For a comprehensive description of the SEM measurement, refer to the user manual of
the R&S FSW.

Remote command:
Selection (SEM): CONF:MEAS ESP

Result diagram ← Spectrum Emission Mask (SEM)

The result diagram is a graphic representation of the signal with a trace that shows the
measured signal. The SEM is represented by a red line.

If any measured power levels are above that limit line, the test fails. If all power levels
are inside the specified limits, the test passes. The application labels the limit line to
indicate whether the limit check has passed or failed.

The x-axis represents the frequency with a frequency span that relates to the specified
NB-IoT channel bandwidths. The y-axis shows the signal power in dBm.

Remote command:
Result query: TRACe:DATA?

Result summary ← Spectrum Emission Mask (SEM)

The result summary shows the signal characteristics in numerical form. Each row in
the table corresponds to a certain SEM range. The columns contain the range charac­teristics. If a limit fails, the range characteristics turn red.

●

Start / Stop Freq Rel

Shows the start and stop frequency of each section of the spectrum emission mask
relative to the center frequency.

●

RBW

Shows the resolution bandwidth of each section of the spectrum emission mask.

●

Freq at Δ to Limit

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R&S®FSW-K106

Measurements and result displays

Frequency sweep measurements

Shows the absolute frequency whose power measurement being closest to the
limit line for the corresponding frequency segment.

●

Power Abs

Shows the absolute measured power of the frequency whose power is closest to
the limit. The application evaluates this value for each frequency segment.

●

Power Rel

Shows the distance from the measured power to the limit line at the frequency
whose power is closest to the limit. The application evaluates this value for each
frequency segment.

●

Δ to Limit

Shows the minimal distance of the tolerance limit to the SEM trace for the corre­sponding frequency segment. Negative distances indicate that the trace is below
the tolerance limit, positive distances indicate that the trace is above the tolerance
limit.

Marker Peak List

The marker peak list determines the frequencies and levels of peaks in the spectrum or
time domain. How many peaks are displayed can be defined, as well as the sort order.
In addition, the detected peaks can be indicated in the diagram. The peak list can also
be exported to a file for analysis in an external application.

Tip: To navigate within long marker peak lists, simply scroll through the entries with
your finger on the touchscreen.

Remote command:
LAY:ADD? '1',RIGH, PEAK, see LAYout:ADD[:WINDow]? on page 82
Results:

CALCulate<n>:MARKer<m>:X on page 112
CALCulate<n>:MARKer<m>:Y on page 112

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4 Configuration

Configuration

Configuration overview

LTE NB-IoT measurements require a special application on the R&S FSW, which you
can select by adding a new measurement channel or replacing an existing one.

When you start the LTE NB-IoT application, the R&S FSW starts to measure the input
signal with the default configuration or the configuration of the last measurement (if you
haven't performed a preset since then).

Automatic refresh of preview and visualization in dialog boxes after configura­tion changes

The R&S FSW supports you in finding the correct measurement settings quickly and
easily - after each change in settings in dialog boxes, the preview and visualization
areas are updated immediately and automatically to reflect the changes. Thus, you can
see if the setting is appropriate or not before accepting the changes.

Unavailable hardkeys

Note that the [SPAN], [BW], [TRACE], [LINES] and [MKR FUNC] keys have no con­tents and no function in the NB-IoT application.

● Configuration overview............................................................................................34

● I/Q measurements...................................................................................................36

● Time alignment error measurements...................................................................... 58

● Frequency sweep measurements...........................................................................59

4.1 Configuration overview

Throughout the measurement channel configuration, an overview of the most important
currently defined settings is provided in the "Overview". The "Overview" is displayed
when you select the "Overview" menu item from the "Meas Setup" menu.

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Configuration

Configuration overview

In addition to the main measurement settings, the "Overview" provides quick access to
the main settings dialog boxes. The individual configuration steps are displayed in the
order of the data flow. Thus, you can easily configure an entire measurement channel
from input over processing to output and analysis by stepping through the dialog boxes
as indicated in the "Overview".

In particular, the "Overview" provides quick access to the following configuration dialog
boxes (listed in the recommended order of processing):

1. Signal Description
See Chapter 4.2.1, "Defining signal characteristics", on page 36.

2. Input / Frontend
See Chapter 4.2.4, "Input source configuration", on page 42.

3. Trigger / Signal Capture
See Chapter 4.2.8, "Trigger configuration", on page 54.
See Chapter 4.2.7, "Configuring the data capture", on page 52

4. Estimation / Tracking
See Chapter 4.2.9, "Parameter estimation and tracking", on page 55.

5. Demodulation
See Chapter 4.2.10, "Configuring demodulation parameters", on page 57.

6. Evaluation Range
See Chapter 5.2.2, "Evaluation range", on page 66.

7. Analysis
See Chapter 5, "Analysis", on page 62.

8. Display Configuration
See Chapter 3, "Measurements and result displays", on page 13.

In addition, the dialog box provides the "Select Measurement" button that serves as a
shortcut to select the measurement type.

To configure settings

► Select any button in the "Overview" to open the corresponding dialog box.

Select a setting in the channel bar (at the top of the measurement channel tab) to
change a specific setting.

Preset Channel............................................................................................................. 35

Select Measurement..................................................................................................... 36

Specific Settings for...................................................................................................... 36

Preset Channel

Select the "Preset Channel" button in the lower left-hand corner of the "Overview" to
restore all measurement settings in the current channel to their default values.

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Configuration

I/Q measurements

Note: Do not confuse the "Preset Channel" button with the [Preset] key, which restores
the entire instrument to its default values and thus closes all channels on the
R&S FSW (except for the default channel)!

Remote command:

SYSTem:PRESet:CHANnel[:EXEC] on page 117

Select Measurement

Opens a dialog box to select the type of measurement.
For more information about selecting measurements, see Chapter 3.1, "Selecting mea-

surements", on page 13.

Remote command:

CONFigure[:LTE]:MEASurement on page 116

Specific Settings for

The channel can contain several windows for different results. Thus, the settings indi­cated in the "Overview" and configured in the dialog boxes vary depending on the
selected window.

Select an active window from the "Specific Settings for" selection list that is displayed
in the "Overview" and in all window-specific configuration dialog boxes.

The "Overview" and dialog boxes are updated to indicate the settings for the selected
window.

4.2 I/Q measurements

● Defining signal characteristics.................................................................................36

● Configuring MIMO setups....................................................................................... 40

● Configuring the control channel.............................................................................. 41

● Input source configuration.......................................................................................42

● Frequency configuration..........................................................................................48

● Amplitude configuration...........................................................................................49

● Configuring the data capture...................................................................................52

● Trigger configuration............................................................................................... 54

● Parameter estimation and tracking......................................................................... 55

● Configuring demodulation parameters....................................................................57

● Automatic configuration...........................................................................................58

4.2.1 Defining signal characteristics

Access: "Overview" > "Signal Description" > "Signal Description"

The general signal characteristics contain settings to describe the general physical
attributes of the signal. They are part of the "Signal Description" tab of the "Signal
Description" dialog box.

The contents of the "Signal Description" dialog box depend on the deployment you
have selected.

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Configuration

I/Q measurements

Selecting the NB-IoT mode...........................................................................................37

Deployment...................................................................................................................37

Carrier Type.................................................................................................................. 38

Defining physical settings for NB-IoT stand alone deployment.....................................38

Defining physical settings for NB-IoT inband deployment.............................................38

Defining physical settings for NB-IoT guardband deployment...................................... 39

Configuring the Physical Layer Cell Identity..................................................................40

Selecting the NB-IoT mode

The "Mode" selects the NB-IoT link direction you are testing.
Note that the R&S FSW only supports measurements on FDD downlink (DL) signals.
FDD and TDD are duplexing methods.

●

FDD mode uses different frequencies for the uplink and the downlink.

●

TDD mode uses the same frequency for the uplink and the downlink.
Note that the NB-IoT standard only supports FDD mode.

Downlink (DL) and Uplink (UL) describe the transmission path.

●

Downlink is the transmission path from the base station to the user equipment.
The physical layer mode for the downlink is always OFDMA.

●

Uplink is the transmission path from the user equipment to the base station.

The application shows the currently selected NB-IoT mode (including the bandwidth) in
the channel bar.

Remote command:
not supported

Deployment

The 3GPP standard specifies several operating modes, or deployment. The deploy­ment specifies where the NB-IoT signal is located in the frequency spectrum.

You can select the deployment of the signal you are testing from the "Deployment"
dropdown menu.

The application supports the following deployments.

●

"Stand Alone"
The NB-IoT signal uses a dedicated spectrum outside of an LTE band, for example
a frequency band currently used by GSM. With a carrier bandwidth of 200 kHz in
GSM, there is enough room for an NB-IoT carrier (180 kHz), including a guard
interval of 10 kHz on both sides of the carrier.

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Configuration

I/Q measurements

●

"In Band"
The NB-IoT signal uses resource blocks within an LTE carrier.

●

"Guard Band"
The NB-IoT signal uses the resource blocks of the guard band of an LTE carrier.

Remote command:

CONFigure[:LTE]:DEPLoyment on page 118

Carrier Type

Selects the NB-IoT carrier type. 3GPP defines different carrier types for NB-IoT sig­nals.

"Anchor"

"Non-Anchor"

Remote command:

CONFigure[:LTE]:TYPE on page 122

Defining physical settings for NB-IoT stand alone deployment

The physical properties of the NB-IoT signal depend on the channel bandwidth.
Currently, the 3GPP standard specifies a 200 kHz bandwidth for an NB-IoT carrier.

This bandwidth corresponds to one LTE resource block (RB).
The application derives various other physical properties of the measured signal from

the bandwidth.

●

"Number of Resource Blocks" (NB_1RB)

●

"FFT Size"

●

"Sample Rate"

●

"Occupied Bandwidth"

●

"Occupied Carriers"

All values are read only.
Remote command:

not supported

The UE assumes a carrier that transmits NPSS, NSSS, NPBCH and
SIB-NB.

The UE assumes a carrier that does not transmit NPSS, NSSS,
NPBCH and SIB-NB.

Defining physical settings for NB-IoT inband deployment

When you use the in band deployment, you have to specify the characteristics of the
LTE (E-UTRA) channel that the NB-IoT channel is located in.

Define the following E-UTRA properties:

●

"E-UTRA Center Frequency"
Center frequency of the LTE channel.

●

"E-UTRA Channel Bandwidth"
Channel bandwidth of the LTE channel (3 MHz, 5 MHz, 10 MHz, 15 MHz or
20 MHz).
Note that the 1.4 MHz bandwidth is not supported for in band transmission of NB­IoT signals.

●

"E-UTRA CRS Sequence Info"
Cell-specific reference signal sequence. The sequence defines the assignment of
resources between LTE and NB-IoT. These sequences are defined in 3GPP

36.213, chapter 16.8.

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Configuration

I/Q measurements

●

"E-UTRA PRB Index"
For inband deployment, the physical resource block (PRB) index is derived from
the E-UTRA CRS sequence info. It defines the location of the NB-IoT carriers in the
E-UTRA signal.

In addition, the application shows various physical properties of the NB-IoT signal.

●

"NB-IoT Channel Bandwidth", which is currently always 200 kHz.

●

"NB-IoT Center Frequency", which is calculated from the E-UTRA channel charac­teristics.

●

"FFT Size"

●

"Sample Rate"

●

"Occupied Bandwidth"

●

"Occupied Carriers"

Remote command:
E-UTRA center frequency: CONFigure[:LTE]:EUTRa:FREQuency on page 118
E-UTRA channel bandwidth: CONFigure[:LTE]:DL[:CC<cc>]:BW on page 120
E-UTRA CRS sequence: CONFigure[:LTE]:DL:SINFo on page 120
E-UTRA PRB index: CONFigure[:LTE]:DL:PINDex on page 120
Query NB-IoT center frequency: [SENSe:]FREQuency:CENTer[:CC<cc>]
on page 134

Defining physical settings for NB-IoT guardband deployment

When you use the guard band deployment, you have to specify the characteristics of
the LTE (E-UTRA) channel that the NB-IoT channel is located in.

Define the following E-UTRA properties:

●

"E-UTRA Center Frequency"
Center frequency of the LTE channel.

●

"E-UTRA Channel Bandwidth"
Channel bandwidth of the LTE channel (3 MHz, 5 MHz, 10 MHz, 15 MHz or
20 MHz).
Note that the 1.4 MHz bandwidth is not supported for guard band transmission of
NB-IoT signals.

●

"Δf to DC"
Location of the center frequency of the NB-IoT carrier relative to center frequency
of the E-UTRA carrier (DC).
The location of the NB-IoT carrier in the guard band must fulfill several require­ments, so possible frequencies are predefined. Available values depend on the "E­UTRA Channel Bandwidth".
If you select the "User Defined" menu item, you can also define locations that do
not fulfill the requirements specified by 3GPP in the "User Value" field.
Positive values correspond to a location in the upper guard band, negative values
to a location in the lower guard band.

In addition, the application shows various physical properties of the NB-IoT signal.

●

"NB-IoT Channel Bandwidth", which is currently always 200 kHz.

●

"NB-IoT Center Frequency", which is calculated from the E-UTRA channel charac­teristics.

●

"FFT Size"

●

"Sample Rate"

●

"Occupied Bandwidth"

39User Manual 1178.5937.02 ─ 13

R&S®FSW-K106

)2()1(

3

IDID

cell
ID

NNN 

Configuration

I/Q measurements

●

"Occupied Carriers"

Remote command:
E-UTRA center frequency: CONFigure[:LTE]:EUTRa:FREQuency on page 118
E-UTRA channel bandwidth: CONFigure[:LTE]:DL[:CC<cc>]:BW on page 120
Location: CONFigure[:LTE]:DL:FREQuency:GINDex on page 119
Custom location: CONFigure[:LTE]:DL:FREQuency:OFFSet on page 119
Query NB-IoT center frequency: [SENSe:]FREQuency:CENTer[:CC<cc>]
on page 134

Configuring the Physical Layer Cell Identity

The "NCell ID", "NCell Identity Group" and physical layer "Identity" are interdependent
parameters. In combination, they are responsible for synchronization between network
and user equipment.

The physical layer cell ID identifies a particular radio cell in the NB-IoT network. The
cell identities are divided into 168 unique cell identity groups. Each group consists of 3
physical layer identities. According to:

(1)

= cell identity group, {0...167}

N

(2)

= physical layer identity, {0...2}

N

there is a total of 504 different cell IDs.
If you change one of these three parameters, the application automatically updates the

other two.
For automatic detection of the cell ID, turn on the "Auto" function.
Before it can establish a connection, the user equipment must synchronize to the radio

cell it is in. For this purpose, two synchronization signals are transmitted on the down­link. These two signals are reference signals whose content is defined by the "Physical
Layer Identity" and the "Cell Identity Group".

Remote command:
Cell ID: CONFigure[:LTE]:DL[:CC<cc>]:PLC:CID on page 121
Cell Identity Group (setting): CONFigure[:LTE]:DL[:CC<cc>]:PLC:CIDGroup
on page 121
Cell Identity Group (query): FETCh[:CC<cc>]:PLC:CIDGroup? on page 122
Identity (setting): CONFigure[:LTE]:DL[:CC<cc>]:PLC:PLID on page 122
Identity (query): FETCh[:CC<cc>]:PLC:PLID? on page 123

4.2.2 Configuring MIMO setups

Access: "Overview" > "Signal Description" > "MIMO Setup"

MIMO measurements need a special setup that you can configure with the settings
available in the MIMO configuration dialog box.

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R&S®FSW-K106

Configuration

I/Q measurements

DUT MIMO Configuration..............................................................................................41

Tx Antenna Selection....................................................................................................41

DUT MIMO Configuration

The "DUT MIMO Configuration" selects the number of antennas in the system you are
analyzing.

The R&S FSW supports measurements on one and two antennas.
Remote command:

CONFigure[:LTE]:DL[:CC<cc>]:MIMO:CONFig on page 124

Tx Antenna Selection

The "Tx Antenna Selection" selects the antenna(s) you want to analyze. The number of
menu items depends on the number of antennas in the system.

Each antenna corresponds to a cell-specific reference signal.

Antenna 1 Tests antenna 1 only.

Antenna 2 Tests antenna 2 only.

Auto Automatically selects the antenna to test.

The antenna you have selected is also the reference antenna for time alignment mea­surements.

Remote command:

CONFigure[:LTE]:DL[:CC<cc>]:MIMO:ASELection on page 123

4.2.3 Configuring the control channel

Access: "Overview" > "Signal Description" > "Advanced Settings" > "Control Channel"

The NPDSCH resource block symbol offset is part of the "Advanced Settings" tab of
the "Signal Description" dialog box.

PRB Symbol Offset....................................................................................................... 41

PRB Symbol Offset

PRB Symbol Offset specifies the symbol offset of the NPDSCH allocations relative to
the subframe start. This setting applies to all subframes in a frame.

Only available for the in band deployment.

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4.2.4 Input source configuration

4.2.4.1 RF input

Configuration

I/Q measurements

Remote command:

CONFigure[:LTE]:DL[:CC<cc>]:PSOFfset on page 124

The R&S FSW supports several input sources and outputs.

For a comprehensive description of the supported inputs and outputs, refer to the
R&S FSW user manual.

● RF input...................................................................................................................42

● External mixer......................................................................................................... 43

● Digital I/Q input........................................................................................................44

● Analog baseband.................................................................................................... 45

● Baseband oscilloscope........................................................................................... 46

● I/Q file......................................................................................................................46

Access: "Overview" > "Input / Frontend" > "Input Source" > "Radio Frequency"

Functions to configure the RF input described elsewhere:

●

"Input Coupling" on page 52

●

"Impedance" on page 52

Direct Path.................................................................................................................... 42

High Pass Filter 1 to 3 GHz...........................................................................................43

YIG-Preselector.............................................................................................................43

Input Connector.............................................................................................................43

Direct Path

Enables or disables the use of the direct path for small frequencies.
In spectrum analyzers, passive analog mixers are used for the first conversion of the

input signal. In such mixers, the LO signal is coupled into the IF path due to its limited
isolation. The coupled LO signal becomes visible at the RF frequency 0 Hz. This effect
is referred to as LO feedthrough.

To avoid the LO feedthrough the spectrum analyzer provides an alternative signal path
to the A/D converter, referred to as the direct path. By default, the direct path is
selected automatically for RF frequencies close to zero. However, this behavior can be
disabled. If "Direct Path" is set to "Off", the spectrum analyzer always uses the analog
mixer path.

"Auto"

"Off"
Remote command:

INPut<ip>:DPATh on page 128

(Default) The direct path is used automatically for frequencies close
to zero.

The analog mixer path is always used.

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Configuration

I/Q measurements

High Pass Filter 1 to 3 GHz

Activates an additional internal highpass filter for RF input signals from 1 GHz to
3 GHz. This filter is used to remove the harmonics of the analyzer to measure the har­monics for a DUT, for example.

This function requires an additional hardware option.
Note: For RF input signals outside the specified range, the high-pass filter has no

effect. For signals with a frequency of approximately 4 GHz upwards, the harmonics
are suppressed sufficiently by the YIG-preselector, if available.)

Remote command:

INPut<ip>:FILTer:HPASs[:STATe] on page 130

YIG-Preselector

Enables or disables the YIG-preselector, if available on the R&S FSW.
An internal YIG-preselector at the input of the R&S FSW ensures that image frequen-

cies are rejected. However, image rejection is only possible for a restricted bandwidth.
To use the maximum bandwidth for signal analysis you can disable the YIG-preselector
at the input of the R&S FSW, which can lead to image-frequency display.

Note: Note that the YIG-preselector is active only on frequencies greater than 8 GHz.
Therefore, switching the YIG-preselector on or off has no effect if the frequency is
below that value.

To make use of the optional 90 GHz frequency extension (R&S FSW-B90G), the YIG­preselector must be disabled.

Remote command:

INPut<ip>:FILTer:YIG[:STATe] on page 130

Input Connector

Determines which connector the input data for the measurement is taken from.
"RF"
"RF Probe"

"Baseband
Input I"

Remote command:

INPut<ip>:CONNector on page 125

(Default:) The "RF Input" connector
The "RF Input" connector with an adapter for a modular probe

This setting is only available if a probe is connected to the "RF Input"
connector.

The optional "Baseband Input I" connector
This setting is only available if the optional "Analog Baseband Inter­face" is installed and active for input. It is not available for the
R&S FSW67.
For R&S FSW85 models with two input connectors, this setting is
only available for "Input 1".

4.2.4.2 External mixer

Access: "Overview" > "Input / Frontend" > "Input Source" > "External Mixer"

Controlling external generators is available with the optional external generator control.
The functionality is the same as in the spectrum application.

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R&S®FSW-K106

4.2.4.3 Digital I/Q input

Configuration

I/Q measurements

For more information about using external generators, refer to the R&S FSW user
manual.

Access: "Overview" > "Input / Frontend" > "Input Source" > "Digital IQ"

Digital I/Q Input State....................................................................................................44

Input Sample Rate........................................................................................................ 44

Full Scale Level.............................................................................................................44

Adjust Reference Level to Full Scale Level...................................................................44

Connected Instrument...................................................................................................44

Digital I/Q Input State

Enables or disable the use of the "Digital I/Q" input source for measurements.
"Digital I/Q" is only available if the optional "Digital Baseband Interface" is installed.
Remote command:

INPut<ip>:SELect on page 132

Input Sample Rate

Defines the sample rate of the digital I/Q signal source. This sample rate must corre­spond with the sample rate provided by the connected device, e.g. a generator.

If "Auto" is selected, the sample rate is adjusted automatically by the connected
device.

The allowed range is from 100 Hz to 20 GHz.
Remote command:

INPut<ip>:DIQ:SRATe on page 128
INPut<ip>:DIQ:SRATe:AUTO on page 128

Full Scale Level

The "Full Scale Level" defines the level and unit that should correspond to an I/Q sam­ple with the magnitude "1".

If "Auto" is selected, the level is automatically set to the value provided by the connec­ted device.

Remote command:

INPut<ip>:DIQ:RANGe[:UPPer] on page 127
INPut<ip>:DIQ:RANGe[:UPPer]:UNIT on page 127
INPut<ip>:DIQ:RANGe[:UPPer]:AUTO on page 127

Adjust Reference Level to Full Scale Level

If enabled, the reference level is adjusted to the full scale level automatically if any
change occurs.

Remote command:

INPut<ip>:DIQ:RANGe:COUPling on page 126

Connected Instrument

Displays the status of the Digital Baseband Interface connection.

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4.2.4.4 Analog baseband

Configuration

I/Q measurements

If an instrument is connected, the following information is displayed:

●

Name and serial number of the instrument connected to the Digital Baseband Inter­face

●

Used port

●

Sample rate of the data currently being transferred via the Digital Baseband Inter­face

●

Level and unit that corresponds to an I/Q sample with the magnitude "1" (Full Scale

Level), if provided by connected instrument

Remote command:

INPut<ip>:DIQ:CDEVice on page 126

Access: "Overview" > "Input / Frontend" > "Input Source" > "Analog BB"

Analog Baseband Input State....................................................................................... 45

I/Q Mode....................................................................................................................... 45

Input Configuration........................................................................................................46

High Accuracy Timing Trigger - Baseband - RF............................................................46

Analog Baseband Input State

Enables or disable the use of the "Analog Baseband" input source for measurements.
"Analog Baseband" is only available if the optional "Analog Baseband Interface" is
installed.

Remote command:

INPut<ip>:SELect on page 132

I/Q Mode

Defines the format of the input signal.
"I + jQ"

"I Only / Low IF I"

"Q Only / Low IF Q"

The input signal is filtered and resampled to the sample rate of the
application.
Two inputs are required for a complex signal, one for the in-phase
component, and one for the quadrature component.

The input signal at the "Baseband Input I" connector is filtered and
resampled to the sample rate of the application.
If the center frequency is set to 0 Hz, the real baseband signal is dis­played without down-conversion (Real Baseband I).
If a center frequency greater than 0 Hz is set, the input signal is
down-converted with the center frequency (Low IF I).

The input signal at the "Baseband Input Q" connector is filtered and
resampled to the sample rate of the application.
If the center frequency is set to 0 Hz, the real baseband signal is dis­played without down-conversion (Real Baseband Q).
If a center frequency greater than 0 Hz is set, the input signal is
down-converted with the center frequency (Low IF Q).

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R&S®FSW-K106

Configuration

I/Q measurements

Remote command:

INPut<ip>:IQ:TYPE on page 131

Input Configuration

Defines whether the input is provided as a differential signal via all four Analog Base­band connectors or as a plain I/Q signal via two simple-ended lines.

Note: Both single-ended and differential probes are supported as input; however, since
only one connector is occupied by a probe, the "Single-ended" setting must be used for
all probes.

"Single-ended"
"Differential"

Remote command:

INPut<ip>:IQ:BALanced[:STATe] on page 131

High Accuracy Timing Trigger - Baseband - RF

Activates a mode with enhanced timing accuracy between analog baseband, RF and
external trigger signals.

Note: Prerequisites for previous models of R&S FSW.
For R&S FSW models with a serial number lower than 103000, special prerequisites
and restrictions apply for high accuracy timing:

●

To obtain this high timing precision, trigger port 1 and port 2 must be connected via
the Cable for High Accuracy Timing (order number 1325.3777.00).

●

As trigger port 1 and port 2 are connected via the cable, only trigger port 3 can be
used to trigger a measurement.

●

Trigger port 2 is configured as output if the high accuracy timing option is active.
Make sure not to activate this option if you use trigger port 2 in your measurement
setup.

●

When you first enable this setting, you are prompted to connect the cable for high
accuracy timing to trigger ports 1 and 2. If you cancel this prompt, the setting
remains disabled. As soon as you confirm this prompt, the cable must be in place ­the firmware does not check the connection. (In remote operation, the setting is
activated without a prompt.)

Remote command:

CALibration:AIQ:HATiming[:STATe] on page 125

I, Q data only
I, Q and inverse I,Q data

(Not available for R&S FSW85)

4.2.4.5 Baseband oscilloscope

Access: "Overview" > "Input / Frontend" > "Input Source" > "Baseband Oscilloscope"

Capturing I/Q data with an oscilloscope is available with the optional baseband oscillo­scope inputs. The functionality is the same as in the spectrum application.

For details, see the user manual of the I/Q analyzer.

4.2.4.6 I/Q file

Access: "Overview" > "Input / Frontend" > "Input Source" > "I/Q File"

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R&S®FSW-K106

Configuration

I/Q measurements

As an alternative to capturing the measurement (I/Q) data live, you can also load previ­ously recorded I/Q data stored in an iq.tar file. The file is then used as the input
source for the application.

Available for I/Q based measurements.

For details, see the user manual of the I/Q analyzer.

I/Q Input File State........................................................................................................ 47

Select I/Q data file.........................................................................................................47

File Repetitions............................................................................................................. 47

Selected Channel..........................................................................................................47

I/Q Input File State

Enables input from the selected I/Q input file.
If enabled, the application performs measurements on the data from this file. Thus,

most measurement settings related to data acquisition (attenuation, center frequency,
measurement bandwidth, sample rate) cannot be changed. The measurement time
can only be decreased to perform measurements on an extract of the available data
only.

Note: Even when the file input is disabled, the input file remains selected and can be
enabled again quickly by changing the state.

Remote command:

INPut<ip>:SELect on page 132

Select I/Q data file

Opens a file selection dialog box to select an input file that contains I/Q data.
The I/Q data must have a specific format (.iq.tar) as described in R&S FSW I/Q

Analyzer and I/Q Input user manual.
The default storage location for I/Q data files is C:\R_S\INSTR\USER.
Remote command:

INPut<ip>:FILE:PATH on page 129

File Repetitions

Determines how often the data stream is repeatedly copied in the I/Q data memory to
create a longer record. If the available memory is not sufficient for the specified num­ber of repetitions, the largest possible number of complete data streams is used.

Remote command:

TRACe:IQ:FILE:REPetition:COUNt on page 134

Selected Channel

Only available for files that contain more than one data stream from multiple channels:
selects the data stream to be used as input for the currently selected channel.

In "Auto" mode (default), the first data stream in the file is used as input for the chan­nel. Applications that support multiple data streams use the first data stream in the file
for the first input stream, the second for the second stream etc.

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4.2.5 Frequency configuration

Configuration

I/Q measurements

Remote command:

MMEMory:LOAD:IQ:STReam on page 133
MMEMory:LOAD:IQ:STReam:AUTO on page 133
MMEMory:LOAD:IQ:STReam:LIST? on page 134

Access: "Overview" > "Input / Frontend" > "Frequency"

Frequency settings define the frequency characteristics of the signal at the RF input.
They are part of the "Frequency" tab of the "Signal Characteristics" dialog box.

The remote commands required to configure the frequency are described in Chap-

ter 6.8.2.3, "Frequency configuration", on page 134.

Signal Frequency.......................................................................................................... 48

└ Center Frequency........................................................................................... 48

└ Frequency Stepsize........................................................................................ 48

Signal Frequency

For measurements with an RF input source, you have to match the center frequency
of the analyzer to the frequency of the signal.

Center Frequency ← Signal Frequency

Defines the center frequency of the signal and thus the frequency the R&S FSW tunes
to.

The frequency range depends on the hardware configuration of the analyzer you are
using.

Note that the center frequency for the in-band deployment is the center frequency of
the used LTE channel (E-UTRA frequency).

Remote command:
Center frequency: [SENSe:]FREQuency:CENTer[:CC<cc>] on page 134
Frequency offset: [SENSe:]FREQuency:CENTer[:CC<cc>]:OFFSet on page 135

Frequency Stepsize ← Signal Frequency

In addition to the frequency itself, you can also define a frequency stepsize. The fre­quency stepsize defines the extent of a frequency change if you change it, for example
with the rotary knob.

You can define the stepsize in two ways.

●

= Center
One frequency step corresponds to the current center frequency.

●

Manual

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R&S®FSW-K106

4.2.6 Amplitude configuration

Configuration

I/Q measurements

Define any stepsize you need.

Remote command:
Frequency stepsize: [SENSe:]FREQuency:CENTer:STEP on page 135

Access: "Overview" > "Input / Frontend" > "Amplitude"

Amplitude settings define the expected level characteristics of the signal at the RF
input.

The remote commands required to configure the amplitude are described in Chap-

ter 6.8.2.4, "Amplitude configuration", on page 135.

Reference Level............................................................................................................49

└ Auto Level.......................................................................................................50

└ Reference Level Offset................................................................................... 50

Attenuating the Signal...................................................................................................50

└ RF Attenuation................................................................................................50

└ Electronic Attenuation.....................................................................................51

Preamplifier...................................................................................................................51

Input Coupling...............................................................................................................52

Impedance.................................................................................................................... 52

Reference Level

The reference level is the power level the analyzer expects at the RF input. Keep in
mind that the power level at the RF input is the peak envelope power for signals with a
high crest factor like NB-IoT.

To get the best dynamic range, you have to set the reference level as low as possible.
At the same time, make sure that the maximum signal level does not exceed the refer­ence level. If it does, it will overload the A/D converter, regardless of the signal power.
Measurement results can deteriorate (e.g. EVM), especially for measurements with
more than one active channel near the one you are trying to measure (± 6 MHz).

Note that the signal level at the A/D converter can be stronger than the level the appli­cation displays, depending on the current resolution bandwidth. This is because the
resolution bandwidths are implemented digitally after the A/D converter.

The reference level is a value in dBm.

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Configuration

I/Q measurements

Remote command:
Reference level: DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel
on page 136

Auto Level ← Reference Level

Automatically determines the ideal reference level. The automatic leveling process
measures the signal and defines the ideal reference signal for the measured signal.

Automatic level detection also optimizes RF attenuation.
Auto leveling slightly increases the measurement time, because of the extra leveling

measurement prior to each sweep. By default, the R&S FSW automatically defines the
time for auto leveling, but you can also define it manually ([Auto Set] > "Auto Level
Config" > "Meas Time").

The application shows the current reference level (including RF and external attenua­tion) in the channel bar.

Remote command:
Automatic: [SENSe:]ADJust:LEVel<ant> on page 151
Auto level mode: [SENSe:]ADJust:CONFigure:LEVel:DURation:MODE
on page 151
Auto level time: [SENSe:]ADJust:CONFigure:LEVel:DURation on page 150

Reference Level Offset ← Reference Level

The reference level offset is an arithmetic level offset. A level offset is useful if the sig­nal is attenuated or amplified before it is fed into the analyzer. All displayed power level
results are shifted by this value. Note however, that the reference value ignores the
level offset. Thus, it is still mandatory to define the actual power level that the analyzer
has to handle as the reference level.

Remote command:

DISPlay[:WINDow<n>]:TRACe<t>:Y[:SCALe]:RLEVel:OFFSet on page 136

Attenuating the Signal

Attenuation of the signal becomes necessary if you have to reduce the power of the
signal that you have applied. Power reduction is necessary, for example, to prevent an
overload of the input mixer.

For a comprehensive information about signal attenuation, refer to the user manual of
the R&S FSW.

The NB-IoT measurement application provides several attenuation modes.

RF Attenuation ← Attenuating the Signal

Controls the RF (or mechanical) attenuator at the RF input.
If you select automatic signal attenuation, the attenuation level is coupled to the refer-

ence level.
If you select manual signal attenuation, you can define an arbitrary attenuation (within

the supported value range).

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R&S®FSW-K106

Configuration

I/Q measurements

Positive values correspond to signal attenuation and negative values correspond to
signal gain.

The application shows the attenuation level (mechanical and electronic) in the channel
bar.

Remote command:
State: INPut<ip>:ATTenuation<ant>:AUTO on page 137
Level: INPut<ip>:ATTenuation<ant> on page 136

Electronic Attenuation ← Attenuating the Signal

Controls the optional electronic attenuator.
If you select automatic signal attenuation, the attenuation level is coupled to the refer-

ence level.
If you select manual signal attenuation, you can define an arbitrary attenuation (within

the supported value range).
Positive values correspond to signal attenuation and negative values correspond to

signal gain.
Note that the frequency range must not exceed the specification of the electronic

attenuator for it to work.
The application shows the attenuation level (mechanical and electronic) in the channel

bar.

Remote command:
Electronic attenuation: INPut<ip>:EATT<ant>:STATe on page 140
Electronic attenuation: INPut<ip>:EATT<ant>:AUTO on page 139
Electronic attenuation: INPut<ip>:EATT<ant> on page 139

Preamplifier

If the (optional) internal preamplifier hardware is installed, a preamplifier can be activa­ted for the RF input signal.

You can use a preamplifier to analyze signals from DUTs with low output power.
Note: If an optional external preamplifier is activated, the internal preamplifier is auto-

matically disabled, and vice versa.
For all R&S FSW models except for R&S FSW85, the following settings are available:

"Off"
"15 dB"
"30 dB"
For R&S FSW85 models, the input signal is amplified by 30 dB if the preamplifier is

activated.

Deactivates the preamplifier.
The RF input signal is amplified by about 15 dB.
The RF input signal is amplified by about 30 dB.

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Configuration

I/Q measurements

Remote command:

INPut<ip>:GAIN:STATe on page 138
INPut<ip>:GAIN[:VALue] on page 138

Input Coupling

The RF input of the R&S FSW can be coupled by alternating current (AC) or direct cur­rent (DC).

AC coupling blocks any DC voltage from the input signal. This is the default setting to
prevent damage to the instrument. Very low frequencies in the input signal may be dis­torted.

However, some specifications require DC coupling. In this case, you must protect the
instrument from damaging DC input voltages manually. For details, refer to the data
sheet.

Remote command:

INPut<ip>:COUPling on page 137

Impedance

For some measurements, the reference impedance for the measured levels of the
R&S FSW can be set to 50 Ω or 75 Ω.

Select 75 Ω if the 50 Ω input impedance is transformed to a higher impedance using a
75 Ω adapter of the RAZ type. (That corresponds to 25Ω in series to the input impe­dance of the instrument.) The correction value in this case is 1.76 dB = 10 log (75Ω/
50Ω).

Remote command:

INPut<ip>:IMPedance on page 139

4.2.7 Configuring the data capture

Access: "Overview" > "Trig / Sig Capture" > "Signal Capture"

Capture Time.................................................................................................................53

Swap I/Q....................................................................................................................... 53

Overall Frame Count.....................................................................................................53

Auto According to Standard.......................................................................................... 53

Number of Frames to Analyze...................................................................................... 53

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Configuration

I/Q measurements

Capture Time

The "Capture Time" corresponds to the time of one measurement. Therefore, it defines
the amount of data the application captures during a single measurement (or sweep).

By default, the application captures 20.1 ms of data to make sure that at least one
complete NB-IoT frame is captured in the measurement.

The application shows the current capture time in the channel bar.
Note that if you are using the multi-standard radio analyzer, only the MSRA primary

channel actually captures the data. The capture time only defines the NB-IoT analysis
interval.

Remote command:

[SENSe:]SWEep:TIME on page 142

Swap I/Q

Swaps the real (I branch) and the imaginary (Q branch) parts of the signal.
Remote command:

[SENSe:]SWAPiq on page 141

Overall Frame Count

The "Overall Frame Count" turns the manual selection of the number of frames to cap­ture (and analyze) on and off.

When you turn on the overall frame count, you can define the number of frames to cap-

ture and analyze. The measurement runs until all frames have been analyzed, even if it

takes more than one capture.
The results are an average of the captured frames.
When you turn off the overall frame count, the application analyzes all NB-IoT frames

found in one capture buffer.
The application shows the current frame count in the channel bar.
Remote command:

[SENSe:][LTE:]FRAMe:COUNt:STATe on page 141

Auto According to Standard

Turns automatic selection of the number of frames to capture and analyze on and off.
When you turn on this feature, the R&S FSW captures and evaluates a number of

frames the 3GPP standard specifies for EVM tests.
If you want to analyze an arbitrary number of frames, turn off the feature.
This parameter is not available when the overall frame count is inactive.
Remote command:

[SENSe:][LTE:]FRAMe:COUNt:AUTO on page 141

Number of Frames to Analyze

Defines the number of frames you want to capture and analyze.
If the number of frames you have set last longer than a single measurement, the appli-

cation continues the measurement until all frames have been captured.
The parameter is read only in the following cases:

●

If you turn off the overall frame count.

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4.2.8 Trigger configuration

Configuration

I/Q measurements

●

If you capture the data according to the standard.

Remote command:

[SENSe:][LTE:]FRAMe:COUNt on page 140

Access: "Overview" > "Trig / Sig Capture" > "Trigger"

A trigger allows you to capture those parts of the signal that you are really interested
in.

While the application runs freely and analyzes all signal data in its default state, no
matter if the signal contains information or not, a trigger initiates a measurement only
under certain circumstances (the trigger event).

Except for the available trigger sources, the functionality is the same as that of the
R&S FSW base system.

For a comprehensive description of the available trigger settings not described here,
refer to the documentation of the R&S FSW.

Gated measurements

In addition to the general trigger functions, the frequency sweep measurements (for
example ACLR) also support gated measurements.

The functionality is basically the same as in the spectrum application. However, the
NB-IoT application automatically selects the correct gate settings (delay and length)
according to the current signal description.

Trigger Source...............................................................................................................54

Trigger Source

The application supports several trigger modes or sources.

●

Free Run

Starts the measurement immediately and measures continuously.

●

External <x>

The trigger event is the level of an external trigger signal. The measurement starts
when this signal meets or exceeds a specified trigger level at the trigger input.
Some measurement devices have several trigger ports. When you use one of
these, several external trigger sources are available.

●

I/Q Power

The trigger event is the magnitude of the sampled I/Q data. The measurement
starts when the magnitude of the I/Q data meets or exceeds the trigger level.

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Configuration

I/Q measurements

●

IF Power

The trigger event is the level of the intermediate frequency (IF). The measurement
starts when the level of the IF meets or exceeds the trigger level.

●

RF Power

The trigger event is the level measured at the RF input. The measurement starts
when the level of the signal meets or exceeds the trigger level.

For all trigger sources, except "Free Run", you can define several trigger characteris­tics.

●

The trigger "Level" defines the signal level that initiates the measurement.

●

The trigger "Offset" is the time that must pass between the trigger event and the
start of the measurement. This can be a negative value (a pretrigger).

●

The trigger "Drop-out Time" defines the time the input signal must stay below the
trigger level before triggering again.

●

The trigger "Slope" defines whether triggering occurs when the signal rises to the
trigger level or falls down to it.

●

The trigger "Holdoff" defines a time period that must at least pass between one trig­ger event and the next.

●

The trigger "Hysteresis" is available for the IF power trigger. It defines a distance to
the trigger level that the input signal must stay below to fulfill the trigger condition.

For a detailed description of the trigger parameters, see the user manual of the I/Q
analyzer.

Remote command:
Source: TRIGger[:SEQuence]:SOURce<ant> on page 146
Level (external): TRIGger[:SEQuence]:LEVel<ant>[:EXTernal<tp>]
on page 144
Level (I/Q power): TRIGger[:SEQuence]:LEVel<ant>:IQPower on page 145
Level (IF power): TRIGger[:SEQuence]:LEVel<ant>:IFPower on page 144
Level (RF power): TRIGger[:SEQuence]:LEVel<ant>:RFPower on page 145
Offset: TRIGger[:SEQuence]:HOLDoff<ant>[:TIME] on page 143
Hysteresis: TRIGger[:SEQuence]:IFPower:HYSTeresis on page 143
Drop-out time: TRIGger[:SEQuence]:DTIMe on page 142
Slope: TRIGger[:SEQuence]:SLOPe on page 146
Holdoff: TRIGger[:SEQuence]:IFPower:HOLDoff on page 143

4.2.9 Parameter estimation and tracking

Access: "Overview" > "Estimation / Tracking"

Parameter estimation and tracking provides functionality to estimate various settings
based on the measured signal and functionality to compensate for errors in the signal.

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Configuration

I/Q measurements

Boosting Estimation...................................................................................................... 56

Channel Estimation.......................................................................................................56

Phase............................................................................................................................56

Time Tracking................................................................................................................56

Boosting Estimation

Turns boosting estimation on and off.
Boosting estimation, when you turn it on, automatically sets the relative power settings

of all physical channels, the NPSS and NSSS by analyzing the signal.
Boosting estimation is always active.
Remote command:

[SENSe:][LTE:]DL:DEMod:BESTimation on page 149

Channel Estimation

Selects the method of channel estimation.

●

EVM 3GPP Definition

Channel estimation according to 3GPP TS 36.141. This method is based on aver­aging in frequency direction and linear interpolation. Examines the reference signal
only.

●

Optimal, Pilot only

Optimal channel estimation method. Examines the reference signal only.

●

Optimal, Pilot and Payload

Optimal channel estimation method. Examines both the reference signal and the
payload resource elements.

Remote command:

[SENSe:][LTE:]DL:DEMod:CESTimation on page 149

Phase

Turns phase tracking on and off.
When you turn on phase tracking, the application compensates the measurement

results for the phase error on a symbol level.
"Off"
"Pilot Only"

"Pilot and Pay­load"

Remote command:

[SENSe:][LTE:]DL:TRACking:PHASe on page 150

Time Tracking

Turns time tracking on and off.
Clock deviations (slower or faster sampling time) lead to a drift of the ideal sampling

instant over time, causing a rotating constellation diagram.
When you turn on time tracking, the application compensates the measurement results

for timing errors on a symbol level.

Phase tracking is not applied.
Only the reference signal is used for the estimation of the phase

error.
Both reference signal and payload resource elements are used for

the estimation of the phase error.

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4.2.10 Configuring demodulation parameters

Configuration

I/Q measurements

Remote command:

[SENSe:][LTE:]DL:TRACking:TIME on page 150

Access: "Overview" > "Demodulation"

Demodulation settings contain settings that describe signal processing and the way the
signal is measured.

Multicarrier Filter........................................................................................................... 57

EVM Calculation Method...............................................................................................57

NPDSCH Reference Data.............................................................................................57

Compensate Crosstalk..................................................................................................58

Multicarrier Filter

Turns the suppression of interference of neighboring carriers for tests on multiradio
base stations on and off (e.g. LTE, WCDMA, GSM etc.).

Remote command:

[SENSe:][LTE:]DL:DEMod:MCFilter on page 148

EVM Calculation Method

Selects the way the EVM is calculated.
"EVM 3GPP

Definition"

"At Optimal
Timing Posi­tion"

Remote command:

[SENSe:][LTE:]DL:DEMod:EVMCalc on page 148

NPDSCH Reference Data

Selects the type of reference data to calculate the EVM for the NPDSCH.
By default, the R&S FSW automatically detects the NPDSCH reference values and

maps the measured values to the nearest reference point.
"Auto Detect"
"All 0"

Remote command:

[SENSe:][LTE:]DL:DEMod:PRData on page 148

Calculates the EVM according to 3GPP TS 36.141. Evaluates the
EVM at two trial timing positions and then uses the higher EVM of the
two.

Calculates the EVM using the optimal timing position.

Automatically detects the NPDSCH reference values.
Assumes the NPDSCH to be all 0's, according to test model defini-

tions.

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4.2.11 Automatic configuration

Configuration

Time alignment error measurements

Compensate Crosstalk

Turns compensation of crosstalk produced by one of the components in the test setup
on and off.

Turn on this feature, if you expect crosstalk from the DUT or another component in the
test setup. This can become necessary, for example, for over-the-air measurements.

If you connect the DUT to the analyzer by cable, turn off crosstalk compensation. In
that case, the only crosstalk results from the DUT itself and contributes as distortion to
the measurement results.

Crosstalk compensation must be activated for Time Alignment Error measurements.
For more information, see Chapter A, "Performing time alignment measurements",
on page 162.

Remote command:

CONFigure[:LTE]:DL[:CC<cc>]:MIMO:CROSstalk on page 147

Access: [AUTO SET]

The R&S FSW features several automatic configuration routines. When you use one of
those, the R&S FSW configures different parameters based on the signal that you are
measuring.

Auto leveling

You can use the auto leveling routine for a quick determination of preliminary amplitude
settings for the current NB-IoT input signal.

Remote command:

[SENSe:]ADJust:LEVel<ant> on page 151

Auto Scaling

Scales the y-axis for best viewing results. Also see "Automatic scaling of the y-axis"
on page 64.

Remote command:

DISPlay[:WINDow<n>][:SUBWindow<w>]:TRACe<t>:Y[:SCALe]:AUTO

on page 159

4.3 Time alignment error measurements

Several settings supported by time alignment error measurements are the same as
those for I/Q measurements. For a comprehensive description, refer to the following
chapters.

●

Chapter 4.2.1, "Defining signal characteristics", on page 36

●

Chapter 4.2.3, "Configuring the control channel", on page 41

●

Chapter 4.2.4, "Input source configuration", on page 42

●

Chapter 4.2.5, "Frequency configuration", on page 48

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4.4 Frequency sweep measurements

Configuration

Frequency sweep measurements

●

Chapter 4.2.6, "Amplitude configuration", on page 49

●

Chapter 4.2.7, "Configuring the data capture", on page 52

●

Chapter 4.2.8, "Trigger configuration", on page 54

●

Chapter 4.2.10, "Configuring demodulation parameters", on page 57

After starting one of the frequency sweep measurements, the application automatically
loads the configuration required by measurements according to the 3GPP standard.

●

The channel configuration defined in the standard for the ACLR measurement.

●

The spectral mask as defined in the 3GPP standard for SEM measurements.

If you need a different measurement configuration, you can change all parameters as
required. Except for the dialog box described below, the measurement configuration
menus for the frequency sweep measurements are the same as in the Spectrum appli­cation.

Refer to the User Manual of the R&S FSW for a detailed description on how to config­ure ACLR and SEM measurements.

● ACLR signal description..........................................................................................59

● SEM signal description............................................................................................60

4.4.1 ACLR signal description

Access: "Overview"

Access: "Meas Config" > "CP / ACLR Config"

The SEM measurement and its settings are basically the same as in the spectrum
application of the R&S FSW. For a comprehensive description, see the R&S FSW user
manual.

In addition, the ACLR measurement in the NB-IoT application has several exclusive
settings not available in the spectrum application.

The signal description for ACLR measurements contains settings to describe general
physical characteristics of the signal you are measuring.

Access: "Meas Setup" > "Signal Description"

●

NB-IoT "Mode": The NB-IoT mode is always "FDD Downlink".

●

"Deployment": The SEM measurement only supports measurements on stand­alone deployment.

●

"Channel Bandwidth": The channel bandwidth for the stand-alone deployment is a
fix value of 200 kHz.

●

"Adjacent Channels": Selects the adjacent channel configuration for the "Stand
Alone" deployment as specified by 3GPP 36.104 chapter 6.6.2.

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4.4.2 SEM signal description

Configuration

Frequency sweep measurements

Access: "Overview"

The SEM measurement and its settings are basically the same as in the spectrum
application of the R&S FSW. For a comprehensive description, see the R&S FSW user
manual.

In addition, the SEM measurement in the NB-IoT application has several exclusive set­tings not available in the spectrum application.

The signal description for SEM measurements contains settings to describe general
physical characteristics of the signal you are measuring.

Access: "Meas Setup" > "Signal Description"

●

NB-IoT "Mode": The NB-IoT mode is always "FDD Downlink".

●

"Deployment": The SEM measurement only supports measurements on stand­alone deployment.

●

"Channel Bandwidth": The channel bandwidth for the stand-alone deployment is a
fix value of 200 kHz.

Category........................................................................................................................60

Tx Power.......................................................................................................................60

Power NB-IoT Carrier....................................................................................................61

Category

Selects the baste station category to test. The base station category defines the shape
of the SEM limit line.

You can select one of the following categories.

●

Wide areas base stations

●

Local area base stations

●

Home base stations

●

Medium range base stations

In addition to the base station category, the shape of the limit line depends on the
power of the NB-IoT carrier.

For medium range base stations, the shape of the limit line also depends on the power
of the transmission channel.

Remote command:

[SENSe:]POWer:SEM:CATegory on page 152

Tx Power

Defines the Tx channel power for medium range base stations. The selected channel
power has an effect on the shape of the SEM limit line.

You can define the channel power either manually or automatically. For automatic
detection, the R&S FSW measures the power of the transmission channel.

Remote command:
State: [SENSe:]POWer:SEM:CHBS:AMPower:AUTO on page 153
Power: [SENSe:]POWer:SEM:CHBS:AMPower on page 152

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Configuration

Frequency sweep measurements

Power NB-IoT Carrier

Defines the power of the NB-IoT carrier. The selected power has an effect on the
shape of the SEM limit line.

You can define the channel power either manually or automatically.
For automatic detection, the R&S FSW measures the power of the NB-IoT carrier. The

limit values are relative values based on the power of the NB-IoT carrier measured in
the reference range.

For manual definition of the power, the limit values are absolute values based on the
power of the NB-IoT carrier.

Remote command:
Mode: [SENSe:]POWer:SEM:PIOM on page 153
Power: [SENSe:]POWer:SEM:PIOV on page 154

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5 Analysis

5.1 General analysis tools

Analysis

General analysis tools

The R&S FSW provides various tools to analyze the measurement results.

● General analysis tools.............................................................................................62

● Analysis tools for I/Q measurements...................................................................... 65

● Analysis tools for frequency sweep measurements................................................68

The general analysis tools are tools available for all measurements.

● Data export..............................................................................................................62

● Microservice export.................................................................................................63

● Diagram scale......................................................................................................... 63

● Zoom.......................................................................................................................64

● Markers................................................................................................................... 64

5.1.1 Data export

Access: [TRACE] > "Trace Export Config"

You can export the measurement results to an ASCII file, for example to backup the
results or analyze the results with external applications (for example in a Microsoft
Excel spreadsheet).

You can also export the I/Q data itself, for example if you want to keep it for later
reevaluation.

The data export is available for:

●

I/Q measurements

●

Time alignment error measurements

Exporting trace data

1. Select the "Trace Export Config" dialog box via the [TRACE] key.

2. Select the data you would like to export.

3. Select the results you would like to export from the "Specifics For" dropdown menu.

4. Export the data with the "Export Trace to ASCII File" feature.

5. Select the location where you would like to save the data (as a .dat file).

Note that the measurement data stored in the file depend on the selected result
display ("Specifics For" selection).

Exporting I/Q data

1. Select the disk icon in the toolbar.

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5.1.2 Microservice export

Analysis

General analysis tools

2. Select "Export" > "I/Q Export".

3. Define a file name and location for the I/Q data.

The file type is iq.tar.

4. Select the folder icon from the toolbar to import I/Q data again later ("Import" > "I/Q

Import").

Data import and export

The basic principle for both trace export and I/Q data export and import is the same as
in the spectrum application. For a comprehensive description, refer to the R&S FSW
user manual.

Remote command:
Trace export: TRACe<n>[:DATA]? on page 102
I/Q export: MMEMory:STORe<n>:IQ:STATe on page 116
I/Q import: MMEMory:LOAD:IQ:STATe on page 116

Access:

You can export the signal configuration in a file format compatible to the cloud-based
microservice (.m5g file extension).

For a comprehensive description of the microservice, refer to the microservice user
manual.

Remote command:

MMEMory:STORe<n>:MSERvice on page 156

/ > "Export" > "Microservice Export"

5.1.3 Diagram scale

Access: "Overview" > "Analysis" > "Scale"

You can change the scale of the y-axis in various diagrams. The y-axis scale deter­mines the vertical resolution of the measurement results.

The scale of the x-axis in the diagrams is fix. If you want to get a better resolution of
the x-axis, you have to zoom into the diagram.

The remote commands required to configure the y-axis scale are described in Chap-

ter 6.9.4, "Y-axis scale", on page 159.

Manual scaling of the y-axis..........................................................................................63

Automatic scaling of the y-axis......................................................................................64

Manual scaling of the y-axis

The "Y Minimum" and "Y Maximum" properties define a custom scale of the y-axis.

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Analysis

General analysis tools

The "Y Minimum" corresponds to the value at the origin. The "Y Maximum" corre­sponds to the last value on the y-axis. The scale you select applies to the currently
active window.

You can restore the original scale anytime with the "Restore Scale" button.
Remote command:

DISPlay[:WINDow<n>][:SUBWindow<w>]:TRACe<t>:Y[:SCALe]:MAXimum

on page 159

DISPlay[:WINDow<n>][:SUBWindow<w>]:TRACe<t>:Y[:SCALe]:MINimum

on page 160

Automatic scaling of the y-axis

Usually, the best way to view the results is if they fit ideally in the diagram area and
display the complete trace. The "Auto Scale Once" automatically determines the scale
of the y-axis that fits this criteria in the currently active window.

Tip: You can also scale the windows in the "Auto Set" menu. In addition to scaling the
selected window ("Auto Scale Window"), you can change the scale of all windows at
the same time ("Auto Scale All").

You can restore the original scale anytime with the "Restore Scale" button.
Remote command:

DISPlay[:WINDow<n>][:SUBWindow<w>]:TRACe<t>:Y[:SCALe]:AUTO

on page 159

5.1.4 Zoom

The zoom feature allows you to zoom into any graphical result display. This can be a
useful tool if you want to analyze certain parts of a diagram in more detail.

The zoom functionality is the same as in the spectrum application.

The following zoom functions are supported.

●

: Magnifies the selected diagram area.

●

: Magnifies the selected diagram area, but keeps the original diagram in a sepa-

rate window.

●

: Restores the original diagram.

Note that the zoom is a graphical feature that magnifies the data in the capture buffer.
Zooming into the diagram does not reevaluate the I/Q data.

For a comprehensive description of the zoom, refer to the R&S FSW user manual.

5.1.5 Markers

Access: "Overview" > "Analysis" > "Marker"

Markers are a tool that help you to identify measurement results at specific trace
points. When you turn on a marker, it gives you the coordinates of its position, for
example the frequency and its level value or the symbol and its EVM value.

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Analysis

Analysis tools for I/Q measurements

In general, the marker functionality of setting and positioning markers is similar to the
spectrum application.

For I/Q measurement, the R&S FSW supports up to four markers, for frequency sweep
measurements there are more. Markers give either absolute values (normal markers)
or values relative to the first marker (deltamarkers). If a result display has more than
one trace, for example the "EVM vs Symbol" result display, you can position the marker
on either trace. By default, all markers are positioned on trace 1.

Note that if you analyze more than one bandwidth part, each bandwidth part is repre­sented by a different trace.

The R&S FSW also supports several automatic positioning mechanisms that allow you
to move the marker to the maximum trace value (peak), the minimum trace value or
move it from peak to subsequent peak.

The marker table summarizes the marker characteristics.

For a comprehensive description, refer to the R&S FSW user manual.

Markers in result displays with a third quantity

In result displays that show a third quantity, for example the "EVM vs Symbol x Carrier"
result, the R&S FSW provides an extended marker functionality.

You can position the marker on a specific resource element, whose position is defined
by the following coordinates:

●

The "Symbol" input field selects the symbol.

●

The "Carrier" input field selects the carrier.

Alternatively, you can define the marker position in the "Marker Configuration" dialog
box, which is expanded accordingly.

The marker information shows the EVM, the power and the allocation ID of the
resource element you have selected as the marker position.

5.2 Analysis tools for I/Q measurements

● Layout of numerical results..................................................................................... 65

● Evaluation range..................................................................................................... 66

● Result settings.........................................................................................................68

5.2.1 Layout of numerical results

You can customize the displayed information of some numerical result displays or
tables, for example the allocation summary.

► Select some point in the header row of the table.

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5.2.2 Evaluation range

Analysis

Analysis tools for I/Q measurements

The application opens a dialog box to add or remove columns.

Add and remove columns as required.

Access: "Overview" > "Evaluation Range"

The evaluation range defines the signal parts that are considered during signal analy­sis.

Subframe Selection.......................................................................................................66

Evaluation range for the constellation diagram.............................................................67

Subframe Selection

The "Subframe" selection filters the results by a specific subframe number.
If you apply the filter, only the results for the subframe you have selected are dis-

played. Otherwise, the R&S FSW shows the results for all subframes that have been
analyzed.

The R&S FSW shows three traces if you display the results for all subframes.

●

One trace ("Min") shows the minimum values measured over all analyzed sub­frames.

●

One trace ("Max") shows the maximum values measured over all analyzed sub­frames.

●

One trace ("Avg") shows the average values measured over all subframes.

If you filter by a single subframe, the R&S FSW shows one trace that represents the
values measured for that subframe only.

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Analysis

Analysis tools for I/Q measurements

You can apply the filter to the following result displays.

●

Result Summary

●

EVM vs Carrier / EVM vs Symbol / EVM vs Symbol X Carrier

●

Group Delay

●

Power vs Symbol X Carrier

●

Constellation Diagram

●

Allocation Summary

●

Time Alignment Error

Remote command:

[SENSe:][LTE:][CC<cc>:]SUBFrame:SELect on page 158

Evaluation range for the constellation diagram

The "Evaluation Range" for the constellation diagram selects the information displayed
in the constellation diagram.

By default, the constellation diagram contains the constellation points of the complete
data that has been analyzed. However, you can filter the results by several aspects.

●

Modulation
Filters the results by the selected type of modulation.

●

Allocation
Filters the results by a certain type of allocation.

●

Symbol (OFDM)
Filters the results by a certain OFDM symbol.

●

Carrier
Filters the results by a certain subcarrier.

●

Location
Selects the point in the signal processing at which the constellation diagram is cre­ated, before or after the MIMO encoding.
For spatial multiplexing, symbols of different encoding schemes are merged in the
MIMO encoder. Thus you get a mix of different modulation alphabets. When you
filter these symbols to show a modulation "MIXTURE", you get the mixed symbols
only if you have selected the "Before MIMO/CDMA Decoder" option.
Note that the PHICH is CDMA encoded. Thus, the constellation points for the
PHICH are either created before or after CDMA encoding.
If you have selected "After MIMO/CDMA Decoder", filtering by "Symbol" and "Car­rier" is not available. Instead, you can filter by "Symbol" and "Codeword".

Remote command:
Modulation: [SENSe:][LTE:][CC<cc>:]MODulation:SELect on page 157
Allocation: [SENSe:][LTE:][CC<cc>:]ALLocation:SELect on page 156
Symbol: [SENSe:][LTE:][CC<cc>:]SYMBol:SELect on page 158
Carrier: [SENSe:][LTE:][CC<cc>:]CARRier:SELect on page 157
Location: [SENSe:][LTE:][CC<cc>:]LOCation:SELect on page 157

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5.2.3 Result settings

Analysis

Analysis tools for frequency sweep measurements

Access: "Overview" > "Analysis" > "Result Settings"

Result settings define the way certain measurement results are displayed.

EVM Unit.......................................................................................................................68

Carrier Axes.................................................................................................................. 68

Marker Coupling............................................................................................................68

EVM Unit

The "EVM Unit" selects the unit for the EVM measurement results in diagrams and
numerical result displays.

Possible units are dB and %.
Remote command:

UNIT:EVM on page 161

Carrier Axes

The "Carrier Axes" selects the unit of the x-axis in result displays that show results
over the subcarriers.

●

"Hertz"
X-axis shows the results in terms of the subcarrier frequency.

●

"Subcarrier Number"
X-axis shows the results in terms of the subcarrier number.

Remote command:

UNIT:CAXes on page 160

Marker Coupling

Couples or decouples markers that are active in multiple result displays.
When you turn on this feature, the application moves the marker to its new position in

all active result displays.
When you turn it off, you can move the markers in different result displays independent

from each other.
Remote command:

CALCulate<n>:MARKer<m>:COUPling on page 160

5.3 Analysis tools for frequency sweep measurements

Access: "Overview" > "Analysis"

Access: "Overview" > "Analysis"

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Analysis

Analysis tools for frequency sweep measurements

The analysis tools available for the frequency sweep measurements are the same as
in the spectrum analyzer.

For more information, refer to the R&S FSW user manual.

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6 Remote control

Remote control

Common suffixes

The following remote control commands are required to configure and perform LTE
NB-IoT measurements in a remote environment. The R&S FSW must already be set
up for remote operation in a network as described in the base unit manual.

Universal functionality

Note that basic tasks that are also performed in the base unit in the same way are not
described here. For a description of such tasks, see the R&S FSW user manual. In
particular, this includes:

●

Managing Settings and Results, i.e. storing and loading settings and result data.

●

Basic instrument configuration, e.g. checking the system configuration, customizing
the screen layout, or configuring networks and remote operation.

●

Using the common status registers (specific status registers for Pulse measure­ments are not used).

SCPI Recorder - automating tasks with remote command scripts

The LTE NB-IoT measurement application also supports the SCPI Recorder functional­ity.

Using the SCPI Recorder functions, you can create a SCPI script directly on the instru­ment and then export the script for use on the controller. You can also edit or write a
script manually, using a suitable editor on the controller. For manual creation, the
instrument supports you by showing the corresponding command syntax for the cur­rent setting value.

For details see the "Network and Remote Operation" chapter in the R&S FSW User
Manual.

● Common suffixes.................................................................................................... 70

● Introduction............................................................................................................. 71

● NB-IoT application selection................................................................................... 76

● Screen layout.......................................................................................................... 80

● Measurement control.............................................................................................. 89

● Trace data readout..................................................................................................93

● Numeric result readout..........................................................................................104

● Configuration.........................................................................................................115

● Analysis.................................................................................................................154

6.1 Common suffixes

In the LTE NB-IoT measurement application, the following common suffixes are used in
remote commands:

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Remote control

Introduction

Table 6-1: Common suffixes used in remote commands in the LTE NB-IoT measurement application

Suffix Value range Description

<m> 1..4 Marker

<n> 1..16 Window (in the currently selected channel)

<t> 1..6 Trace

<li> 1 to 8 Limit line

<ant> 1..2 Selects an antenna for MIMO measurements.

<cc> 1..5 Selects a component carrier.

Irrelevant for the NB-IoT application.

<k> --- Selects a limit line.

Irrelevant for the NB-IoT application.

<np> 0...20 Selects a NPUSCH (NB-IoT uplink only)

6.2 Introduction

Commands are program messages that a controller (e.g. a PC) sends to the instru­ment or software. They operate its functions ('setting commands' or 'events') and
request information ('query commands'). Some commands can only be used in one
way, others work in two ways (setting and query). If not indicated otherwise, the com­mands can be used for settings and queries.

The syntax of a SCPI command consists of a header and, usually, one or more param­eters. To use a command as a query, you have to append a question mark after the
last header element, even if the command contains a parameter.

A header contains one or more keywords, separated by a colon. Header and parame­ters are separated by a "white space" (ASCII code 0 to 9, 11 to 32 decimal, e.g. blank).
If there is more than one parameter for a command, they are separated by a comma
from one another.

Only the most important characteristics that you need to know when working with SCPI
commands are described here. For a more complete description, refer to the user
manual of the R&S FSW.

Remote command examples

Note that some remote command examples mentioned in this general introduction are
possibly not supported by this particular application.

6.2.1 Conventions used in descriptions

The following conventions are used in the remote command descriptions:

●

Command usage

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Remote control

Introduction

If not specified otherwise, commands can be used both for setting and for querying
parameters.
If a command can be used for setting or querying only, or if it initiates an event, the
usage is stated explicitly.

●

Parameter usage

If not specified otherwise, a parameter can be used to set a value and it is the
result of a query.
Parameters required only for setting are indicated as Setting parameters.
Parameters required only to refine a query are indicated as Query parameters.
Parameters that are only returned as the result of a query are indicated as Return
values.

●

Conformity
Commands that are taken from the SCPI standard are indicated as SCPI con­firmed. All commands used by the R&S FSW follow the SCPI syntax rules.

●

Asynchronous commands

A command which does not automatically finish executing before the next com­mand starts executing (overlapping command) is indicated as an Asynchronous
command.

●

Reset values (*RST)

Default parameter values that are used directly after resetting the instrument (*RST
command) are indicated as *RST values, if available.

●

Default unit

The default unit is used for numeric values if no other unit is provided with the
parameter.

●

Manual operation

If the result of a remote command can also be achieved in manual operation, a link
to the description is inserted.

6.2.2 Long and short form

The keywords have a long and a short form. You can use either the long or the short
form, but no other abbreviations of the keywords.

The short form is emphasized in uppercase letters. Note however, that this emphasis
only serves the purpose to distinguish the short from the long form in the manual. For
the instrument, the case does not matter.

Example:

SENSe:FREQuency:CENTer is the same as SENS:FREQ:CENT.

6.2.3 Numeric suffixes

Some keywords have a numeric suffix if the command can be applied to multiple
instances of an object. In that case, the suffix selects a particular instance (e.g. a mea­surement window).

Numeric suffixes are indicated by angular brackets (<n>) next to the keyword.

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6.2.4 Optional keywords

Remote control

Introduction

If you do not quote a suffix for keywords that support one, a 1 is assumed.

Example:

DISPlay[:WINDow<1...4>]:ZOOM:STATe enables the zoom in a particular mea­surement window, selected by the suffix at WINDow.

DISPlay:WINDow4:ZOOM:STATe ON refers to window 4.

Some keywords are optional and are only part of the syntax because of SCPI compli­ance. You can include them in the header or not.

If an optional keyword has a numeric suffix and you need to use the suffix, you have to
include the optional keyword. Otherwise, the suffix of the missing keyword is assumed
to be the value 1.

Optional keywords are emphasized with square brackets.

Example:

Without a numeric suffix in the optional keyword:
[SENSe:]FREQuency:CENTer is the same as FREQuency:CENTer
With a numeric suffix in the optional keyword:

DISPlay[:WINDow<1...4>]:ZOOM:STATe
DISPlay:ZOOM:STATe ON enables the zoom in window 1 (no suffix).
DISPlay:WINDow4:ZOOM:STATe ON enables the zoom in window 4.

6.2.5 Alternative keywords

A vertical stroke indicates alternatives for a specific keyword. You can use both key­words to the same effect.

Example:

[SENSe:]BANDwidth|BWIDth[:RESolution]

In the short form without optional keywords, BAND 1MHZ would have the same effect
as BWID 1MHZ.

6.2.6 SCPI parameters

Many commands feature one or more parameters.

If a command supports more than one parameter, they are separated by a comma.

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6.2.6.1 Numeric values

Remote control

Introduction

Example:

LAYout:ADD:WINDow Spectrum,LEFT,MTABle

Parameters can have different forms of values.

● Numeric values....................................................................................................... 74

● Boolean...................................................................................................................75

● Character data........................................................................................................ 75

● Character strings.....................................................................................................75

● Block data............................................................................................................... 75

Numeric values can be entered in any form, i.e. with sign, decimal point or exponent.
For physical quantities, you can also add the unit. If the unit is missing, the command
uses the basic unit.

Example:

With unit: SENSe:FREQuency:CENTer 1GHZ
Without unit: SENSe:FREQuency:CENTer 1E9 would also set a frequency of 1 GHz.

Values exceeding the resolution of the instrument are rounded up or down.

If the number you have entered is not supported (e.g. for discrete steps), the command
returns an error.

Instead of a number, you can also set numeric values with a text parameter in special
cases.

●

MIN/MAX
Defines the minimum or maximum numeric value that is supported.

●

DEF
Defines the default value.

●

UP/DOWN
Increases or decreases the numeric value by one step. The step size depends on
the setting. Sometimes, you can customize the step size with a corresponding
command.

Querying numeric values

When you query numeric values, the system returns a number. For physical quantities,
it applies the basic unit (e.g. Hz for frequencies). The number of digits after the decimal
point depends on the type of numeric value.

Example:

Setting: SENSe:FREQuency:CENTer 1GHZ
Query: SENSe:FREQuency:CENTer? would return 1E9

Sometimes, numeric values are returned as text.

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6.2.6.2 Boolean

Remote control

Introduction

●

INF/NINF
Infinity or negative infinity. Represents the numeric values 9.9E37 or -9.9E37.

●

NAN
Not a number. Represents the numeric value 9.91E37. NAN is returned if errors
occur.

Boolean parameters represent two states. The "on" state (logically true) is represented
by "ON" or the numeric value 1. The "off" state (logically untrue) is represented by
"OFF" or the numeric value 0.

Querying Boolean parameters

When you query Boolean parameters, the system returns either the value 1 ("ON") or
the value 0 ("OFF").

Example:

Setting: DISPlay:WINDow:ZOOM:STATe ON
Query: DISPlay:WINDow:ZOOM:STATe? would return 1

6.2.6.3 Character data

Character data follows the syntactic rules of keywords. You can enter text using a short
or a long form. For more information, see Chapter 6.2.2, "Long and short form",
on page 72.

Querying text parameters

When you query text parameters, the system returns its short form.

Example:

Setting: SENSe:BANDwidth:RESolution:TYPE NORMal
Query: SENSe:BANDwidth:RESolution:TYPE? would return NORM

6.2.6.4 Character strings

Strings are alphanumeric characters. They have to be in straight quotation marks. You
can use a single quotation mark ( ' ) or a double quotation mark ( " ).

Example:

INSTRument:DELete 'Spectrum'

6.2.6.5 Block data

Block data is a format which is suitable for the transmission of large amounts of data.

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6.3 NB-IoT application selection

Remote control

NB-IoT application selection

The ASCII character # introduces the data block. The next number indicates how many
of the following digits describe the length of the data block. The data bytes follow. Dur­ing the transmission of these data bytes, all end or other control signs are ignored until
all bytes are transmitted. #0 specifies a data block of indefinite length. The use of the
indefinite format requires an NL^END message to terminate the data block. This format
is useful when the length of the transmission is not known or if speed or other consid­erations prevent segmentation of the data into blocks of definite length.

INSTrument:CREate:DUPLicate........................................................................................ 76

INSTrument:CREate[:NEW].............................................................................................. 76

INSTrument:CREate:REPLace..........................................................................................77

INSTrument:DELete......................................................................................................... 77

INSTrument:LIST?........................................................................................................... 77

INSTrument:REName.......................................................................................................79

INSTrument[:SELect]........................................................................................................79

INSTrument:CREate:DUPLicate

This command duplicates the currently selected channel, i.e creates a new channel of
the same type and with the identical measurement settings. The name of the new
channel is the same as the copied channel, extended by a consecutive number (e.g.
"IQAnalyzer" -> "IQAnalyzer 2").

The channel to be duplicated must be selected first using the INST:SEL command.

Example:

INST:SEL 'IQAnalyzer'
INST:CRE:DUPL

Duplicates the channel named 'IQAnalyzer' and creates a new
channel named 'IQAnalyzer2'.

Usage: Event

INSTrument:CREate[:NEW] <ChannelType>, <ChannelName>

This command adds an additional measurement channel. You can configure up to 10
measurement channels at the same time (depending on available memory).

Parameters:

<ChannelType> Channel type of the new channel.

For a list of available channel types see INSTrument:LIST?
on page 77.

<ChannelName> String containing the name of the channel.

Note that you can not assign an existing channel name to a new
channel; this will cause an error.

Example:

INST:CRE SAN, 'Spectrum 2'

Adds an additional spectrum display named "Spectrum 2".

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NB-IoT application selection

INSTrument:CREate:REPLace <ChannelName1>,<ChannelType>,<ChannelName2>

This command replaces a channel with another one.

Setting parameters:

<ChannelName1> String containing the name of the channel you want to replace.

<ChannelType> Channel type of the new channel.

For a list of available channel types see INSTrument:LIST?
on page 77.

<ChannelName2> String containing the name of the new channel.

Note: If the specified name for a new channel already exists, the
default name, extended by a sequential number, is used for the
new channel (see INSTrument:LIST? on page 77).
Channel names can have a maximum of 31 characters, and
must be compatible with the Windows conventions for file
names. In particular, they must not contain special characters
such as ":", "*", "?".

Example:

Usage: Setting only

INSTrument:DELete <ChannelName>

This command deletes a channel.

If you delete the last channel, the default "Spectrum" channel is activated.

Setting parameters:

<ChannelName> String containing the name of the channel you want to delete.

Example:

Usage: Setting only

INSTrument:LIST?

This command queries all active channels. This is useful in order to obtain the names
of the existing channels, which are required in order to replace or delete the channels.

INST:CRE:REPL 'IQAnalyzer2',IQ,'IQAnalyzer'

Replaces the channel named "IQAnalyzer2" by a new channel of
type "IQ Analyzer" named "IQAnalyzer".

A channel must exist in order to be able delete it.

INST:DEL 'IQAnalyzer4'

Deletes the channel with the name 'IQAnalyzer4'.

Return values:

<ChannelType>,
<ChannelName>

For each channel, the command returns the channel type and
channel name (see tables below).
Tip: to change the channel name, use the INSTrument:

REName command.

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NB-IoT application selection

Example:

INST:LIST?

Result for 3 channels:

'ADEM','Analog Demod','IQ','IQ
Analyzer','IQ','IQ Analyzer2'

Usage: Query only

Table 6-2: Available channel types and default channel names in Signal and Spectrum Analyzer mode

Application <ChannelType>

parameter

Spectrum SANALYZER Spectrum

1xEV-DO BTS (R&S FSW-K84) BDO 1xEV-DO BTS

1xEV-DO MS (R&S FSW-K85) MDO 1xEV-DO MS

3GPP FDD BTS (R&S FSW-K72) BWCD 3G FDD BTS

3GPP FDD UE (R&S FSW-K73) MWCD 3G FDD UE

802.11ad (R&S FSW-K95) WIGIG 802.11ad

802.11ay (R&S FSW-K97) EDMG 802.11ay EDMG

Amplifier Measurements (R&S FSW-K18) AMPLifier Amplifier

AM/FM/PM Modulation Analysis (R&S FSW-K7) ADEM Analog Demod

Avionics (R&S FSW-K15) AVIonics Avionics

Default Channel name*)

cdma2000 BTS (R&S FSW-K82) BC2K CDMA2000 BTS

cdma2000 MS (R&S FSW-K83) MC2K CDMA2000 MS

DOCSIS 3.1 (R&S FSW-K192/193) DOCSis DOCSIS 3.1

Fast Spur Search (R&S FSW-K50) SPUR Spurious

GSM (R&S FSW-K10) GSM GSM

HRP UWB (R&S FSW-K149) UWB HRP UWB

I/Q Analyzer IQ IQ Analyzer

LTE (R&S FSW-K10x) LTE LTE

Multi-Carrier Group Delay (R&S FSW-K17) MCGD MC Group Delay

NB-IoT (R&S FSW-K106) NIOT NB-IoT

Noise (R&S FSW-K30) NOISE Noise

5G NR (R&S FSW-K144) NR5G 5G NR

OFDM VSA (R&S FSW-K96) OFDMVSA OFDM VSA

OneWeb (R&S FSW-K201) OWEB OneWeb

Phase Noise (R&S FSW-K40) PNOISE Phase Noise

Pulse (R&S FSW-K6) PULSE Pulse

*) If the specified name for a new channel already exists, the default name, extended by a sequential num­ber, is used for the new channel.

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NB-IoT application selection

Application <ChannelType>

parameter

Real-Time Spectrum RTIM Real-Time Spectrum

TD-SCDMA BTS (R&S FSW-K76) BTDS TD-SCDMA BTS

TD-SCDMA UE (R&S FSW-K77) MTDS TD-SCDMA UE

Transient Analysis (R&S FSW-K60) TA Transient Analysis

Verizon 5GTF Measurement Application (V5GTF,
R&S FSW-K118)

VSA (R&S FSW-K70) DDEM VSA

WLAN (R&S FSW-K91) WLAN WLAN

*) If the specified name for a new channel already exists, the default name, extended by a sequential num­ber, is used for the new channel.

V5GT V5GT

Default Channel name*)

INSTrument:REName <ChannelName1>, <ChannelName2>

This command renames a channel.

Setting parameters:

<ChannelName1> String containing the name of the channel you want to rename.

<ChannelName2> String containing the new channel name.

Note that you cannot assign an existing channel name to a new
channel; this will cause an error.
Channel names can have a maximum of 31 characters, and
must be compatible with the Windows conventions for file
names. In particular, they must not contain special characters
such as ":", "*", "?".

Example:

INST:REN 'IQAnalyzer2','IQAnalyzer3'

Renames the channel with the name 'IQAnalyzer2' to 'IQAna­lyzer3'.

Usage: Setting only

INSTrument[:SELect] <ChannelType>

This command selects a new measurement channel with the defined channel type.

Parameters:

<ChannelType> NIOT

LTE NB-IoT measurement channel

Example: //Select LTE NB-IoT application

INST NIOT

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6.4 Screen layout

6.4.1 General layout

Remote control

Screen layout

● General layout.........................................................................................................80

● Layout of a single channel...................................................................................... 81

The following commands are required to configure general window layout, independent
of the application.

Note that the suffix <n> always refers to the window in the currently selected measure-
ment channel.

DISPlay:FORMat............................................................................................................. 80

DISPlay[:WINDow<n>]:SIZE............................................................................................. 80

DISPlay[:WINDow<n>][:SUBWindow<w>]:SELect............................................................... 81

DISPlay[:WINDow<n>]:TAB<tab>:SELect...........................................................................81

DISPlay:FORMat <Format>

This command determines which tab is displayed.

Parameters:

<Format> SPLit

Displays the MultiView tab with an overview of all active chan­nels

SINGle

Displays the measurement channel that was previously focused.
*RST: SING

Example:

DISPlay[:WINDow<n>]:SIZE <Size>

This command maximizes the size of the selected result display window temporarily.
To change the size of several windows on the screen permanently, use the LAY:SPL
command (see LAYout:SPLitter on page 85).

Suffix:

<n>

Parameters:
<Size> LARGe

DISP:FORM SPL

.

Window

Maximizes the selected window to full screen.
Other windows are still active in the background.

SMALl

Reduces the size of the selected window to its original size.
If more than one measurement window was displayed originally,
these are visible again.

*RST: SMALl

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Remote control

Screen layout

Example:

DISP:WIND2:SIZE LARG

DISPlay[:WINDow<n>][:SUBWindow<w>]:SELect

This command sets the focus on the selected result display window.

This window is then the active window.

For measurements with multiple results in subwindows, the command also selects the
subwindow. Use this command to select the (sub)window before querying trace data.

Suffix:

<n>

.

Window

<w> subwindow

Not supported by all applications

Example: //Put the focus on window 1

DISP:WIND1:SEL

Example: //Put the focus on subwindow 2 in window 1

DISP:WIND1:SUBW2:SEL

DISPlay[:WINDow<n>]:TAB<tab>:SELect

This command selects a tab in diagrams with multiple subwindows (or views).

Note that selecting a tab does not actually select a subwindow. To select a subwindow,
for example to query the results of a subwindow, use DISPlay[:WINDow<n>][:

SUBWindow<w>]:SELect.

Suffix:

<n>

.

Window

<tab> 1..n

Tab

Example: //Select a tab

DISP:WIND2:TAB2:SEL

6.4.2 Layout of a single channel

The following commands are required to change the evaluation type and rearrange the
screen layout for a measurement channel as you do using the SmartGrid in manual
operation. Since the available evaluation types depend on the selected application,
some parameters for the following commands also depend on the selected measure­ment channel.

Note that the suffix <n> always refers to the window in the currently selected measure-
ment channel.

LAYout:ADD[:WINDow]?................................................................................................... 82

LAYout:CATalog[:WINDow]?..............................................................................................84

LAYout:IDENtify[:WINDow]?.............................................................................................. 84

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Screen layout

LAYout:REMove[:WINDow]............................................................................................... 85

LAYout:REPLace[:WINDow].............................................................................................. 85

LAYout:SPLitter................................................................................................................85

LAYout:WINDow<n>:ADD?............................................................................................... 87

LAYout:WINDow<n>:IDENtify?.......................................................................................... 87

LAYout:WINDow<n>:REMove............................................................................................88

LAYout:WINDow<n>:REPLace.......................................................................................... 88

LAYout:WINDow<n>:TYPE................................................................................................89

LAYout:ADD[:WINDow]? <WindowName>,<Direction>,<WindowType>

This command adds a window to the display in the active channel.

This command is always used as a query so that you immediately obtain the name of
the new window as a result.

To replace an existing window, use the LAYout:REPLace[:WINDow] command.

Query parameters:

<WindowName> String containing the name of the existing window the new win-

dow is inserted next to.
By default, the name of a window is the same as its index. To
determine the name and index of all active windows, use the

LAYout:CATalog[:WINDow]? query.

<Direction> LEFT | RIGHt | ABOVe | BELow

Direction the new window is added relative to the existing win­dow.

<WindowType> text value

Type of result display (evaluation method) you want to add.
See the table below for available parameter values.

Return values:

<NewWindowName> When adding a new window, the command returns its name (by

default the same as its number) as a result.

Example:

LAY:ADD? '1',LEFT,MTAB

Result:

'2'

Adds a new window named '2' with a marker table to the left of
window 1.

Usage: Query only

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Screen layout

Manual operation: See "Capture Buffer" on page 17

See "EVM vs Carrier" on page 18
See "EVM vs Symbol" on page 19
See "EVM vs Subframe" on page 20
See "Frequency Error vs Symbol" on page 20
See "Power Spectrum" on page 21
See "Channel Flatness" on page 21
See "Group Delay" on page 22
See "Channel Flatness Difference" on page 22
See "Constellation Diagram" on page 22
See "CCDF" on page 23
See "Allocation Summary" on page 24
See "EVM vs Symbol x Carrier" on page 25
See "Power vs Symbol x Carrier" on page 25
See "Allocation ID vs Symbol x Carrier" on page 26
See "Result Summary" on page 26
See "Marker Table" on page 28
See "Time Alignment Error" on page 29
See "Marker Peak List" on page 33

Table 6-3: <WindowType> parameter values for NB-IoT downlink measurement application

Parameter value Window type

I/Q measurements

AISC Allocation ID vs. Symbol X Carrier

ASUM Allocation Summary

CBUF Capture Buffer

CCDF CCDF

FLAT Channel Flatness

CONS Constellation Diagram

EVCA EVM vs. Carrier

EVSC EVM vs. Symbol X Carrier

EVSU EVM vs. Subframe

EVSY EVM vs. Symbol

FEVS Frequency Error vs. Symbol

GDEL Group Delay

MTAB Marker Table

PSPE Power Spectrum

PVSC Power vs. Symbol X Carrier

RSUM Result Summary

Time alignment error

CBUF Capture Buffer

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Screen layout

Parameter value Window type

MTAB Marker Table

PSPE Power Spectrum

TAL Time Alignment Error

ACLR and SEM measurements

DIAG Diagram

PEAK Peak List

MTAB Marker Table

RSUM Result Summary

LAYout:CATalog[:WINDow]?

This command queries the name and index of all active windows in the active channel
from top left to bottom right. The result is a comma-separated list of values for each
window, with the syntax:

<WindowName_1>,<WindowIndex_1>..<WindowName_n>,<WindowIndex_n>

Return values:

<WindowName> string

Name of the window.
In the default state, the name of the window is its index.

<WindowIndex> numeric value

Index of the window.

Example:

LAY:CAT?

Result:

'2',2,'1',1

Two windows are displayed, named '2' (at the top or left), and '1'
(at the bottom or right).

Usage: Query only

LAYout:IDENtify[:WINDow]? <WindowName>

This command queries the index of a particular display window in the active channel.

Note: to query the name of a particular window, use the LAYout:WINDow<n>:

IDENtify? query.

Query parameters:

<WindowName> String containing the name of a window.

Return values:

<WindowIndex> Index number of the window.

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Screen layout

Example:

Usage: Query only

LAYout:REMove[:WINDow] <WindowName>

This command removes a window from the display in the active channel.

Setting parameters:

<WindowName> String containing the name of the window. In the default state,

Example:

Usage: Setting only

LAYout:REPLace[:WINDow] <WindowName>,<WindowType>

This command replaces the window type (for example from "Diagram" to "Result Sum­mary") of an already existing window in the active channel while keeping its position,
index and window name.

LAY:WIND:IDEN? '2'

Queries the index of the result display named '2'.
Response:

2

the name of the window is its index.

LAY:REM '2'

Removes the result display in the window named '2'.

To add a new window, use the LAYout:ADD[:WINDow]? command.

Setting parameters:

<WindowName> String containing the name of the existing window.

By default, the name of a window is the same as its index. To
determine the name and index of all active windows in the active
channel, use the LAYout:CATalog[:WINDow]? query.

<WindowType> Type of result display you want to use in the existing window.

See LAYout:ADD[:WINDow]? on page 82 for a list of available
window types.

Example:

Usage: Setting only

LAYout:SPLitter <Index1>, <Index2>, <Position>

This command changes the position of a splitter and thus controls the size of the win­dows on each side of the splitter.

Compared to the DISPlay[:WINDow<n>]:SIZE on page 80 command, the
LAYout:SPLitter changes the size of all windows to either side of the splitter per­manently, it does not just maximize a single window temporarily.

LAY:REPL:WIND '1',MTAB

Replaces the result display in window 1 with a marker table.

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Remote control

Screen layout

Note that windows must have a certain minimum size. If the position you define con­flicts with the minimum size of any of the affected windows, the command will not work,
but does not return an error.

Figure 6-1: SmartGrid coordinates for remote control of the splitters

Setting parameters:

<Index1> The index of one window the splitter controls.

<Index2> The index of a window on the other side of the splitter.

<Position> New vertical or horizontal position of the splitter as a fraction of

the screen area (without channel and status bar and softkey
menu).
The point of origin (x = 0, y = 0) is in the lower left corner of the
screen. The end point (x = 100, y = 100) is in the upper right cor­ner of the screen. (See Figure 6-1.)
The direction in which the splitter is moved depends on the
screen layout. If the windows are positioned horizontally, the
splitter also moves horizontally. If the windows are positioned
vertically, the splitter also moves vertically.

Range: 0 to 100

Example:

LAY:SPL 1,3,50

Moves the splitter between window 1 ('Frequency Sweep') and 3
('Marker Table') to the center (50%) of the screen, i.e. in the fig­ure above, to the left.

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Remote control

Screen layout

Example:

Usage: Setting only

LAYout:WINDow<n>:ADD?

This command adds a measurement window to the display. Note that with this com­mand, the suffix <n> determines the existing window next to which the new window is
added, as opposed to LAYout:ADD[:WINDow]?, for which the existing window is
defined by a parameter.

To replace an existing window, use the LAYout:WINDow<n>:REPLace command.

This command is always used as a query so that you immediately obtain the name of
the new window as a result.

Suffix:

<n>

LAY:SPL 1,4,70

Moves the splitter between window 1 ('Frequency Sweep') and 3
('Marker Peak List') towards the top (70%) of the screen.
The following commands have the exact same effect, as any
combination of windows above and below the splitter moves the
splitter vertically.

LAY:SPL 3,2,70
LAY:SPL 4,1,70
LAY:SPL 2,1,70

<Direction>,<WindowType>

.

Window

Query parameters:

<Direction> LEFT | RIGHt | ABOVe | BELow

<WindowType> Type of measurement window you want to add.

See LAYout:ADD[:WINDow]? on page 82 for a list of available
window types.

Return values:

<NewWindowName> When adding a new window, the command returns its name (by

default the same as its number) as a result.

Example:

Usage: Query only

LAYout:WINDow<n>:IDENtify?

This command queries the name of a particular display window (indicated by the <n>
suffix) in the active channel.

Note: to query the index of a particular window, use the LAYout:IDENtify[:

WINDow]? command.

LAY:WIND1:ADD? LEFT,MTAB

Result:

'2'

Adds a new window named '2' with a marker table to the left of
window 1.

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Remote control

Screen layout

Suffix:

<n>

Return values:

<WindowName> String containing the name of a window.

Example:

Usage: Query only

LAYout:WINDow<n>:REMove

This command removes the window specified by the suffix <n> from the display in the
active channel.

The result of this command is identical to the LAYout:REMove[:WINDow] command.

Suffix:

<n>

Example:

.

Window

In the default state, the name of the window is its index.

LAY:WIND2:IDEN?

Queries the name of the result display in window 2.
Response:

'2'

.

Window

LAY:WIND2:REM

Removes the result display in window 2.

Usage: Event

LAYout:WINDow<n>:REPLace <WindowType>

This command changes the window type of an existing window (specified by the suffix
<n>) in the active channel.

The effect of this command is identical to the LAYout:REPLace[:WINDow] com­mand.

To add a new window, use the LAYout:WINDow<n>:ADD? command.

Suffix:

<n>

Setting parameters:

<WindowType> Type of measurement window you want to replace another one

Example:

Usage: Setting only

.

Window

with.
See LAYout:ADD[:WINDow]? on page 82 for a list of available
window types.

LAY:WIND2:REPL MTAB

Replaces the result display in window 2 with a marker table.

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Remote control

Measurement control

LAYout:WINDow<n>:TYPE <WindowType>

Queries or defines the window type of the window specified by the index <n>. The win­dow type determines which results are displayed. For a list of possible window types
see LAYout:ADD[:WINDow]? on page 82.

Note this command is not available in all applications and measurements.

Suffix:

<n>

Parameters:

<WindowType>

Example:

.

1..n

Window

LAY:WIND2:TYPE?

6.5 Measurement control

6.5.1 Measurements

ABORt............................................................................................................................ 89

INITiate<n>:CONTinuous..................................................................................................90

INITiate<n>[:IMMediate]....................................................................................................90

[SENSe:]SYNC[:CC<cc>][:STATe]?....................................................................................91

ABORt

This command aborts the measurement in the current channel and resets the trigger
system.

To prevent overlapping execution of the subsequent command before the measure­ment has been aborted successfully, use the *OPC? or *WAI command after ABOR and
before the next command.

For details on overlapping execution see Remote control via SCPI.

Note on blocked remote control programs:

If a sequential command cannot be completed, for example because a triggered sweep
never receives a trigger, the remote control program will never finish and the remote
channel to the R&S FSW is blocked for further commands. In this case, you must inter­rupt processing on the remote channel first in order to abort the measurement.

To do so, send a "Device Clear" command from the control instrument to the R&S FSW
on a parallel channel to clear all currently active remote channels. Depending on the
used interface and protocol, send the following commands:

●

Visa: viClear()

●

GPIB: ibclr()

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Remote control

Measurement control

●

RSIB: RSDLLibclr()

Now you can send the ABORt command on the remote channel performing the mea­surement.

Example:

Example:

Usage: Event

INITiate<n>:CONTinuous <State>

This command controls the measurement mode for an individual channel.

Note that in single measurement mode, you can synchronize to the end of the mea­surement with *OPC, *OPC? or *WAI. In continuous measurement mode, synchroniza­tion to the end of the measurement is not possible. Thus, it is not recommended that
you use continuous measurement mode in remote control, as results like trace data or
markers are only valid after a single measurement end synchronization.

For details on synchronization see Remote control via SCPI.

Suffix:

<n>

ABOR;:INIT:IMM

Aborts the current measurement and immediately starts a new
one.

ABOR;*WAI
INIT:IMM

Aborts the current measurement and starts a new one once
abortion has been completed.

.

irrelevant

Parameters:

<State> ON | OFF | 0 | 1

ON | 1

Continuous measurement

OFF | 0

Single measurement
*RST: 1

Example:

INITiate<n>[:IMMediate]

This command starts a (single) new measurement.

You can synchronize to the end of the measurement with *OPC, *OPC? or *WAI.

For details on synchronization see Remote control via SCPI.

Suffix:

<n>

INIT:CONT OFF

Switches the measurement mode to single measurement.

INIT:CONT ON

Switches the measurement mode to continuous measurement.

.

irrelevant

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Remote control

Measurement control

[SENSe:]SYNC[:CC<cc>][:STATe]?

This command queries the current synchronization state.

6.5.2

Suffix:

<cc>

.

irrelevant

Return values:

<State> The string contains the following information:

A zero represents a failure and a one represents a successful
synchronization.

Example: //Query synchronization state

SYNC:STAT?

Would return, e.g. '1' for successful synchronization.

Usage: Query only

Measurement sequences

INITiate:SEQuencer:ABORt.............................................................................................. 91

INITiate:SEQuencer:IMMediate......................................................................................... 91

INITiate:SEQuencer:MODE...............................................................................................92

SYSTem:SEQuencer........................................................................................................92

INITiate:SEQuencer:ABORt

This command stops the currently active sequence of measurements.

You can start a new sequence any time using INITiate:SEQuencer:IMMediate
on page 91.

Usage:

Event

INITiate:SEQuencer:IMMediate

This command starts a new sequence of measurements by the Sequencer.

Its effect is similar to the INITiate<n>[:IMMediate] command used for a single
measurement.

Before this command can be executed, the Sequencer must be activated (see

SYSTem:SEQuencer on page 92).

Example:

SYST:SEQ ON

Activates the Sequencer.

INIT:SEQ:MODE SING

Sets single sequence mode so each active measurement will be
performed once.

INIT:SEQ:IMM

Starts the sequential measurements.

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Remote control

Measurement control

INITiate:SEQuencer:MODE <Mode>

Defines the capture mode for the entire measurement sequence and all measurement
groups and channels it contains.

Note: In order to synchronize to the end of a measurement sequence using *OPC,
*OPC? or *WAI you must use SINGle Sequence mode.

Parameters:

<Mode> SINGle

Each measurement group is started one after the other in the
order of definition. All measurement channels in a group are
started simultaneously and performed once. After all measure­ments are completed, the next group is started. After the last
group, the measurement sequence is finished.

CONTinuous

Each measurement group is started one after the other in the
order of definition. All measurement channels in a group are
started simultaneously and performed once. After all measure­ments are completed, the next group is started. After the last
group, the measurement sequence restarts with the first one and
continues until it is stopped explicitely.

*RST:

CONTinuous

SYSTem:SEQuencer <State>

This command turns the Sequencer on and off. The Sequencer must be active before
any other Sequencer commands (INIT:SEQ...) are executed, otherwise an error will
occur.

Parameters:

<State> ON | OFF | 0 | 1

ON | 1

The Sequencer is activated and a sequential measurement is
started immediately.

OFF | 0

The Sequencer is deactivated. Any running sequential measure­ments are stopped. Further Sequencer commands
(INIT:SEQ...) are not available.

*RST: 0

Example:

SYST:SEQ ON

Activates the Sequencer.

INIT:SEQ:MODE SING

Sets single Sequencer mode so each active measurement will
be performed once.

INIT:SEQ:IMM

Starts the sequential measurements.

SYST:SEQ OFF

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6.6 Trace data readout

6.6.1 The TRACe[:DATA] command

Remote control

Trace data readout

● The TRACe[:DATA] command................................................................................ 93

● Result readout.......................................................................................................103

This chapter contains information on the TRACe:DATA command and a detailed
description of the characteristics of that command.

The TRACe:DATA command queries the trace data or results of the currently active
measurement or result display. The type, number and structure of the return values are
specific for each result display. In case of results that have any kind of unit, the com­mand returns the results in the unit you have currently set for that result display.

Note also that return values for results that are available for both downlink and uplink
may be different.

For several result displays, the command also supports various SCPI parameters in
combination with the query. If available, each SCPI parameter returns a different
aspect of the results. If SCPI parameters are supported, you have to quote one in the
query.

Example:

TRAC2:DATA? TRACE1

The format of the return values is either in ASCII or binary characters and depends on
the format you have set with FORMat[:DATA].

Following this detailed description, you will find a short summary of the most important
functions of the command (TRACe<n>[:DATA]?).

Selecting a measurement window

Before querying results, you have to select the measurement window with the suffix
<n> at TRACe. The range of <n> depends on the number of active measurement win­dows.

● Adjacent channel leakage ratio...............................................................................94

● Allocation ID vs symbol x carrier.............................................................................94

● Allocation summary.................................................................................................94

● Capture buffer......................................................................................................... 96

● CCDF...................................................................................................................... 96

● Channel and spectrum flatness...............................................................................96

● Channel and spectrum flatness difference..............................................................97

● Group delay.............................................................................................................97

● Constellation diagram............................................................................................. 97

● EVM vs carrier.........................................................................................................98

● EVM vs subframe....................................................................................................98

● EVM vs symbol....................................................................................................... 98

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6.6.1.1 Adjacent channel leakage ratio

6.6.1.2 Allocation ID vs symbol x carrier

Remote control

Trace data readout

● EVM vs symbol x carrier......................................................................................... 99

● Frequency error vs symbol......................................................................................99

● Power spectrum...................................................................................................... 99

● Power vs symbol x carrier.......................................................................................99

● Spectrum emission mask......................................................................................100

● Return value codes............................................................................................... 100

For the ACLR result display, the number and type of returns values depend on the
parameter.

TRAC:DATA TRACE1

●

Returns one value for each trace point.

For the allocation ID vs symbol x carrier, the command returns one value for each
resource element.

<ID[Symbol(0),Carrier(1)]>, ..., <ID[Symbol(0),Carrier(n)]>,

<ID[Symbol(1),Carrier(1)]>, ..., <ID[Symbol(1),Carrier(n)]>,

...

<ID[Symbol(n),Carrier(1)]>, ..., <ID[Symbol(n),Carrier(n)]>,

The <allocation ID> is encoded.

For the code assignment, see Chapter 6.6.1.18, "Return value codes", on page 100.

The following parameters are supported.

TRAC:DATA TRACE1

●

6.6.1.3 Allocation summary

For the allocation summary, the command returns several values for each line of the
table.

<subframe>

●

<allocation ID>

●

<number of RB>

●

<relative power>

●

<modulation>

●

<absolute power>

●

<EVM>

●

<LayerEVM>

●

The data format of the return values is always ASCII.

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The return values have the following characteristics.

●

The <allocation ID is encoded.
For the code assignment, see Chapter 6.6.1.18, "Return value codes",
on page 100.

●

The unit for <relative power> is always dB.

●

The <modulation> is encoded.
For the code assignment, see Chapter 6.6.1.18, "Return value codes",
on page 100.

●

The unit for <absolute power> is always dBm.

●

The unit for <EVM> depends on UNIT:EVM.

●

The unit for <LayerEVM> depends on UNIT:EVM.

Example:

Remote control

Trace data readout

TRAC:DATA? TRACE1 would return:

0, -5, 0, 0.0000000000000, 2, -45.5463829153428, 7.33728660354122E-05, 8.2587600145187E-05

0, -3, 0, 0.0073997452251, 6, -42.5581007463452, 2.54197349219455E-05, 2.9270188222955E-05

0, -4, 0, 0.0052647197362, 1, -42.5464220485716, 2.51485275782241E-05, 2.5002471912438E-05

...

Additional information "ALL"

The allocation summary contains additional lines "ALL" that summarize the number of
RB analyzed in each subframe and the average EVM measured in that subframe. This
information is added to the return values after all allocations of the subframe have
been returned. The "ALL" information has the allocation ID code "-2".

In addition, there is a line at the end of the allocation summary that shows the average
EVM over all analyzed subframes. This information is also added as the last return val­ues. The "ALL" information has the subframe ID and allocation ID code "-2".

A query result would thus look like this, for example:

//For subframe 0:

0, -40, 10, 2, 2, -84.7431947342849, 2.68723483754626E-06,

0, -41, 0, 0, 6, -84.7431432845264, 2.37549449584568E-06,

(...)

//ALL for subframe 0:

0,-2,20,,,,2.45581475911678E-06

//For subframe 1:

1, -40, 10, 2, 2, -84.7431947342849, 2.68723483754626E-06,

1, -41, 0, 0, 6, -84.7431432845264, 2.37549449584568E-06,

(...)

//ALL for subframe 1:

1,-2,20,,,,2.45581475911678E-06

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6.6.1.4 Capture buffer

6.6.1.5 CCDF

Remote control

Trace data readout

(...)

//ALL for all subframes

-2,-2,,,,,2.13196434228374E-06

For the capture buffer result display, the command returns one value for each I/Q sam­ple in the capture buffer.

<absolute power>, ...

The unit is always dBm.

The following parameters are supported.

TRAC:DATA TRACE1

●

For the CCDF result display, the type of return values depends on the parameter.

TRAC:DATA TRACE1

●

Returns the probability values (y-axis).

<# of values>, <probability>, ...

The unit is always %.
The first value that is returned is the number of the following values.

TRAC:DATA TRACE2

●

Returns the corresponding power levels (x-axis).

<# of values>, <relative power>, ...

The unit is always dB.
The first value that is returned is the number of the following values.

6.6.1.6 Channel and spectrum flatness

For the channel flatness result display, the command returns one value for each trace
point.

<relative power>, ...

The unit is always dB.

The following parameters are supported.

TRAC:DATA TRACE1

●

Returns the average power over all subframes.

TRAC:DATA TRACE2

●

Returns the minimum power found over all subframes. If you are analyzing a partic­ular subframe, it returns nothing.

TRAC:DATA TRACE3

●

Returns the maximum power found over all subframes. If you are analyzing a par­ticular subframe, it returns nothing.

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6.6.1.7 Channel and spectrum flatness difference

Remote control

Trace data readout

For the channel flatness difference result display, the command returns one value for
each trace point.

<relative power>, ...

The unit is always dB. The number of values depends on the selected NB-IoT band­width.

The following parameters are supported.

TRAC:DATA TRACE1

●

Returns the average power over all subframes.

TRAC:DATA TRACE2

●

Returns the minimum power found over all subframes. If you are analyzing a partic­ular subframe, it returns nothing.

TRAC:DATA TRACE3

●

Returns the maximum power found over all subframes. If you are analyzing a par­ticular subframe, it returns nothing.

6.6.1.8 Group delay

For the group delay result display, the command returns one value for each trace point.

<group delay>, ...

The unit is always ns. The number of values depends on the selected NB-IoT band­width.

The following parameters are supported.

TRAC:DATA TRACE1

●

Returns the group delay.

6.6.1.9 Constellation diagram

For the constellation diagram, the command returns two values for each constellation
point.

<I[SF0][Sym0][Carrier1]>, <Q[SF0][Sym0][Carrier1]>, ..., <I[SF0][Sym0][Carrier(n)]>, <Q[SF0][Sym0][Car­rier(n)]>,

<I[SF0][Sym1][Carrier1]>, <Q[SF0][Sym1][Carrier1]>, ..., <I[SF0][Sym1][Carrier(n)]>, <Q[SF0][Sym1][Car­rier(n)]>,

<I[SF0][Sym(n)][Carrier1]>, <Q[SF0][Sym(n)][Carrier1]>, ..., <I[SF0][Sym(n)][Carrier(n)]>, <Q[SF0][Sym(n)]
[Carrier(n)]>,

<I[SF1][Sym0][Carrier1]>, <Q[SF1][Sym0][Carrier1]>, ..., <I[SF1][Sym0][Carrier(n)]>, <Q[SF1][Sym0][Car­rier(n)]>,

<I[SF1][Sym1][Carrier1]>, <Q[SF1][Sym1][Carrier1]>, ..., <I[SF1][Sym1][Carrier(n)]>, <Q[SF1][Sym1][Car­rier(n)]>,

<I[SF(n)][Sym(n)][Carrier1]>, <Q[SF(n)][Sym(n)][Carrier1]>, ..., <I[SF(n)][Sym(n)][Carrier(n)]>, <Q[SF(n)]
[Sym(n)][Carrier(n)]>

With SF = subframe and Sym = symbol of that subframe.

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6.6.1.10 EVM vs carrier

Remote control

Trace data readout

The I and Q values have no unit.

The number of return values depends on the constellation selection. By default, it
returns all resource elements including the DC carrier.

The following parameters are supported.

TRAC:DATA TRACE1

●

Returns all constellation points included in the selection.

For the EVM vs carrier result display, the command returns one value for each subcar­rier that has been analyzed.

<EVM>, ...

The unit depends on UNIT:EVM.

The following parameters are supported.

TRAC:DATA TRACE1

●

Returns the average EVM over all subframes

TRAC:DATA TRACE2

●

Returns the minimum EVM found over all subframes. If you are analyzing a particu­lar subframe, it returns nothing.

TRAC:DATA TRACE3

●

Returns the maximum EVM found over all subframes. If you are analyzing a partic­ular subframe, it returns nothing.

6.6.1.11 EVM vs subframe

For the EVM vs subframe result display, the command returns one value for each sub­frame that has been analyzed.

<EVM>, ...

The unit depends on UNIT:EVM.

The following parameters are supported.

TRAC:DATA TRACE1

●

6.6.1.12 EVM vs symbol

For the EVM vs symbol result display, the command returns one value for each OFDM
symbol that has been analyzed.

<EVM>, ...

For measurements on a single subframe, the command returns the symbols of that
subframe only.

The unit depends on UNIT:EVM.

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6.6.1.13 EVM vs symbol x carrier

Remote control

Trace data readout

The following parameters are supported.

TRAC:DATA TRACE1

●

For the EVM vs symbol x carrier, the command returns one value for each resource
element.

<EVM[Symbol(0),Carrier(1)]>, ..., <EVM[Symbol(0),Carrier(n)]>,

<EVM[Symbol(1),Carrier(1)]>, ..., <EVM[Symbol(1),Carrier(n)]>,

...

<EVM[Symbol(n),Carrier(1)]>, ..., <EVM[Symbol(n),Carrier(n)]>,

The unit depends on UNIT:EVM.

Resource elements that are unused return NAN.

The following parameters are supported.

TRAC:DATA TRACE1

●

6.6.1.14 Frequency error vs symbol

For the frequency error vs symbol result display, the command returns one value for
each OFDM symbol that has been analyzed.

<frequency error>,...

The unit is always Hz.

The following parameters are supported.

TRAC:DATA TRACE1

●

6.6.1.15 Power spectrum

For the power spectrum result display, the command returns one value for each trace
point.

<power>,...

The unit is always dBm/Hz.

The following parameters are supported.

TRAC:DATA TRACE1

●

6.6.1.16 Power vs symbol x carrier

For the power vs symbol x carrier, the command returns one value for each resource
element.

<P[Symbol(0),Carrier(1)]>, ..., <P[Symbol(0),Carrier(n)]>,

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6.6.1.17 Spectrum emission mask

Remote control

Trace data readout

<P[Symbol(1),Carrier(1)]>, ..., <P[Symbol(1),Carrier(n)]>,

...

<P[Symbol(n),Carrier(1)]>, ..., <P[Symbol(n),Carrier(n)]>,

with P = Power of a resource element.

The unit is always dBm.

Resource elements that are unused return NAN.

The following parameters are supported.

TRAC:DATA TRACE1

●

For the SEM measurement, the number and type of returns values depend on the
parameter.

TRAC:DATA TRACE1

●

Returns one value for each trace point.

<absolute power>, ...

The unit is always dBm.

TRAC:DATA LIST

●

Returns the contents of the SEM table. For every frequency in the spectrum emis­sion mask, it returns 11 values.

<index>, <start frequency in Hz>, <stop frequency in Hz>,
<RBW in Hz>, <limit fail frequency in Hz>, <absolute power in
dBm>, <relative power in dBc>, <limit distance in dB>, <limit
check result>, <reserved>, <reserved>...
The <limit check result> is either a 0 (for PASS) or a 1 (for FAIL).

6.6.1.18 Return value codes

<number of symbols or bits>

In hexadecimal mode, this represents the number of symbols to be transmitted. In
binary mode, it represents the number of bits to be transmitted.

<allocation ID>

Represents the allocation ID. The range is as follows.

●

0 = NPDSCH

●

-1 = Invalid / not used

●

-2 = All

●

-3 = NPSS

●

-4 = NSSS

●

-5 = Reference Signal (Antenna 1)

●

-6 = Reference Signal (Antenna 2)

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