R&S®FSWP-B1
Multi-Standard Radio Analyzer
User Manual
(;ÛÈÌ2)
1177586202
User Manual
Version 08
This manual describes the following R&S®FSWP models with firmware version 1.90 or higher:
●
R&S®FSWP8 (1322.8003K08)
●
R&S®FSWP26 (1322.8003K26)
●
R&S®FSWP50 (1322.8003K50)
The MSRA mode is an integral part of the following options:
●
R&S FSWP-B1 (1322.9997.08)
●
R&S FSWP-B1 (1322.9997.26)
●
R&S FSWP-B1 (1322.9997.50)
© 2019 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: +49 89 41 29 - 0
Fax: +49 89 41 29 12 164
Email: info@rohde-schwarz.com
Internet: www.rohde-schwarz.com
Subject to change – Data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1177.5862.02 | Version 08 | R&S®FSWP-B1
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®FSWP is indicated as
R&S FSWP.
R&S®FSWP-B1
1 Preface.................................................................................................... 5
1.1 About this Manual......................................................................................................... 5
1.2 Documentation Overview............................................................................................. 6
1.3 Conventions Used in the Documentation...................................................................7
2 Welcome to the MSRA Operating Mode...............................................9
2.1 Starting the MSRA operating mode.............................................................................9
2.2 Understanding the Display Information....................................................................10
3 Measurements and Result Displays...................................................16
4 Applications and Operating Modes....................................................18
4.1 Available Slave Applications......................................................................................19
Contents
Contents
4.2 Selecting the Operating Mode and Slave Applications........................................... 20
4.3 Using the Sequencer in MSRA Mode........................................................................ 21
5 MSRA Basics........................................................................................23
5.1 Configuration...............................................................................................................23
5.2 Data Acquisition..........................................................................................................24
5.3 Multi-Standard Analysis............................................................................................. 25
5.4 Restrictions for Slave Applications...........................................................................26
5.5 Measurements in the Time and Frequency Domain................................................ 27
6 Configuration........................................................................................29
6.1 Configuration Overview..............................................................................................30
6.2 Input Source Settings................................................................................................. 32
6.3 Amplitude.....................................................................................................................35
6.4 Frequency Settings.....................................................................................................39
6.5 Trigger Settings...........................................................................................................41
6.6 Data Acquisition and Bandwidth Settings................................................................46
6.7 Output Settings........................................................................................................... 53
6.8 Display Configuration.................................................................................................54
6.9 Automatic Settings..................................................................................................... 54
7 Analysis................................................................................................ 57
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7.1 Configuring the Analysis Line................................................................................... 57
8 How to Perform Measurements in MSRA Mode................................ 59
9 Remote Commands to Perform Measurements in MSRA Mode......62
9.1 Introduction................................................................................................................. 62
9.2 Common Suffixes........................................................................................................67
9.3 Activating MSRA Measurements............................................................................... 68
9.4 Configuring MSRA Measurements............................................................................ 73
9.5 Capturing Data and Performing Sweeps.................................................................. 99
9.6 Retrieving Results.....................................................................................................104
9.7 Querying the Status Registers.................................................................................108
9.8 Analyzing MSRA Measurements..............................................................................111
9.9 Commands Specific to MSRA Slave Applications................................................. 111
Contents
Annex.................................................................................................. 114
A Annex.................................................................................................. 114
A.1 Reference: Format Description for I/Q Data Files.................................................. 114
A.2 Formats for Returned Values: ASCII Format and Binary Format......................... 115
A.3 Sample Rate and Maximum Usable I/Q Bandwidth for RF Input.......................... 116
List of Remote Commands (MSRA)..................................................120
Index....................................................................................................123
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1 Preface
1.1 About this Manual
Preface
About this Manual
This R&S FSWP MSRA User Manual provides all the information specific to the oper-
ating mode. All general instrument functions and settings common to all applications
and operating modes are described in the main R&S FSWP User Manual.
The main focus in this manual is on the measurement results and the tasks required to
obtain them. The following topics are included:
●
Welcome to the MSRA Operating Mode
Introduction to and getting familiar with the operating mode
●
Typical Applications
Example measurement scenarios in which the operating mode is frequently used
●
Measurements and Result Displays
Details on supported measurements and their result types
●
MSRA Basics
Background information on basic terms and principles in the context of the MSRA
operating mode
●
MSRA Configuration
A concise description of all functions and settings available to configure an MSRA
measurement with their corresponding remote control command
●
How to Perform Measurements in MSRA Mode
The basic procedure to perform an MSRA measurement with step-by-step instructions
●
Measurement Examples
Detailed measurement examples to guide you through typical measurement scenarios and allow you to try out the operating mode immediately
●
Optimizing and Troubleshooting the Measurement
Hints and tips on how to handle errors and optimize the test setup
●
Remote Commands for MSRA Measurements
Remote commands required to configure and perform MSRA measurements in a
remote environment, sorted by tasks
(Commands required to set up the environment or to perform common tasks on the
instrument are provided in the main R&S FSWP User Manual)
Programming examples demonstrate the use of many commands and can usually
be executed directly for test purposes
●
Annex
Reference material
●
List of remote commands
Alphabetical list of all remote commands described in the manual
●
Index
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1.2 Documentation Overview
1.2.1 Getting Started Manual
Preface
Documentation Overview
This section provides an overview of the R&S FSWP user documentation. Unless
specified otherwise, you find most of the documents on the R&S FSWP product page
at:
www.rohde-schwarz.com/manual/fswp
Introduces the R&S FSWP and describes how to set up and start working with the
product. Includes basic operations, typical measurement examples, and general information, e.g. safety instructions, etc.
A printed version is delivered with the instrument. A PDF version is available for download on the Internet.
1.2.2 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.
●
Manuals for (optional) firmware applications
Contains the description of the specific functions of a firmware application, including remote control commands. Basic information on operating the R&S FSWP is
not included.
The contents of the user manuals are available as help in the R&S FSWP. 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.
1.2.3 Service Manual
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 download for registered users on the global
Rohde & Schwarz information system (GLORIS):
https://gloris.rohde-schwarz.com
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1.2.4 Instrument Security Procedures
1.2.5 Basic Safety Instructions
1.2.6 Data Sheets and Brochures
Preface
Conventions Used in the Documentation
Deals with security issues when working with the R&S FSWP in secure areas. It is
available for download on the Internet.
Contains safety instructions, operating conditions and further important information.
The printed document is delivered with the instrument.
The data sheet contains the technical specifications of the R&S FSWP. It also lists the
options 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/fswp
1.2.7 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/fswp
1.2.8 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/fswp
1.3 Conventions Used in the Documentation
1.3.1 Typographical Conventions
The following text markers are used throughout this documentation:
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Preface
Conventions Used in the 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.
1.3.2 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.
1.3.3 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 MSRA Operating Mode
Welcome to the MSRA Operating Mode
Starting the MSRA operating mode
The MSRA operating mode is part of the standard R&S FSWP firmware and adds
functionality to perform multi-standard radio analysis.
The R&S FSWP MSRA operating mode features:
●
Analysis of the same I/Q data in more than one application
●
Analysis of correlated effects due to multiple standards
●
Configuration of data acquisition settings only required once for all applications
●
Overview of all results in one screen in addition to large display of individual results
●
Common analysis line (time marker) across all applications
●
Performing measurements in the frequency and time domain (such as channel
power measurements) on I/Q data
Availability of the Multi-Standard Radio Analyzer
The Multi-Standard Radio Analyzer becomes available when you equip the
R&S FSWP with the optional Spectrum Analyzer hardware (R&S FSWP-B1).
Note that the MSRA does not support all applications (for example, the Phase Noise
application is not supported by MSRA).
This user manual contains a description of the functionality specific to the MSRA operating mode, including remote control operation.
All functions not discussed in this manual are the same as in Signal and Spectrum
Analyzer mode and are described in the R&S FSWP User Manual. The latest version
is available for download at the product homepage
http://www.rohde-schwarz.com/product/fswp.html.
Additional information
An application note discussing efficient measurements using the MSRA mode is available from the Rohde & Schwarz website:
1EF83: Using the R&S®FSW for Efficient Measurements on Multi- Standard Radio
Base Stations (MSRA)
2.1 Starting the MSRA operating mode
MSRA is a new operating mode on the R&S FSWP.
To activate the MSRA operating mode
1. Select the [MODE] key.
A dialog box opens that contains all operating modes and applications currently
available on your R&S FSWP.
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Welcome to the MSRA Operating Mode
Understanding the Display Information
2. Select the "Multi Standard Radio Analyzer" tab.
3. Confirm the message informing you that you are changing operating modes.
The R&S FSWP closes all active measurement channels in the current operating
mode, then opens a new measurement channel for the MSRA operating mode.
Note: when you return to the Phase Noise Analyzer mode, the R&S FSWP opens
a Spectrum channel.
In addition to the "MSRA View", an "MSRA Master" tab is displayed.
The Sequencer is automatically activated in continuous mode (see Chapter 4.3,
"Using the Sequencer in MSRA Mode", on page 21), starting an I/Q Analyzer
data acquisition with the default settings (but with a "Spectrum" result display). It
can be configured in the MSRA "Overview" dialog box, which is displayed when
you select the "Overview" softkey from any menu (see Chapter 6, "Configuration",
on page 29).
Remote command:
INST:MODE MSR, see INSTrument:MODE on page 71
2.2 Understanding the Display Information
The following figure shows a screen display during MSRA operation. All different information areas are labeled. They are explained in more detail in the following sections.
●
The orange background of the screen behind the measurement channel tabs indicates that you are in MSRA operating mode.
●
The icon on the tab label indicates that the displayed trace (e.g. in an MSRA
slave application) no longer matches the currently captured data. This may be the
case, for example, if a data acquisition was performed in another slave application.
As soon as the result display is refreshed, the icon disappears.
●
The icon indicates that an error or warning is available for that measurement
channel. This is particularly useful if the MSRA View tab is displayed.
An orange "IQ" indicates that the results displayed in the MSRA slave application(s) no
longer match the data captured by the MSRA Master. The "IQ" disappears after the
results in the slave application(s) are refreshed.
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Welcome to the MSRA Operating Mode
Understanding the Display Information
1 = MSRA View (overview of all active channels in MSRA mode)
2 = MSRA Master (data acquisition channel with global configuration settings)
3 = Measurement channel tab for individual MSRA slave application
4 = Channel bar for firmware and measurement settings of current slave application
5+6 = Window title bar with diagram-specific (trace) information and analysis interval (slave applications)
7 = Diagram area
8 = Diagram footer with diagram-specific information, depending on evaluation
9 = Instrument status bar with error messages, progress bar and date/time display
The diagram area varies depending on the type of measurement channel, as described
in detail in the following topics.
Window title bar information
For each diagram, the header provides the following information:
Figure 2-1: Window title bar information in MSRA mode
1 = Window number
2 = Window type
3 = Trace color
4 = Trace number
5 = Detector
6 = Trace mode
7 = Analysis interval
8 = Analysis line indication
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Welcome to the MSRA Operating Mode
Understanding the Display Information
Diagram footer information
The information in the diagram footer (beneath the diagram) depends on the evaluation:
●
Center frequency
●
Number of sweep points
●
Range per division (x-axis)
●
Span (Spectrum)
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.
If an error or warning is available for a measurement channel, the icon is displayed
next to the tab label in the channel bar.
2.2.1 MSRA View
The MSRA View is an overview of all active channels in MSRA mode, similar to the
MultiView tab in Signal and Spectrum Analyzer mode. At the top of the screen the
MSRA Master is displayed, i.e. the application that captures data. Beneath the MSRA
Master, all active slave applications are displayed in individual windows. Each slave
application has its own channel bar with the current settings as well as a button in
order to switch to that slave application tab directly.
The MSRA View displays the following basic elements:
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2.2.2 MSRA Master
Welcome to the MSRA Operating Mode
Understanding the Display Information
1 = Channel information bar for the MSRA Master
2 = Slave application data coverage for each active slave application
3 = Result display for MSRA Master (for entire capture buffer)
4 = Channel information bar for slave application with button to switch to slave application tab
5 = Result display for slave application (for analysis interval)
The MSRA Master is the only channel that captures data. It also controls global configuration settings for all slave applications. The MSRA Master channel itself is implemented as an I/Q Analyzer slave application. The MSRA Master measurement channel
cannot be deleted or replaced.
The following figure shows the screen elements specific to the MSRA Master.
1
= Channel information bar for the MSRA Master
2 = Data coverage for each active slave application
3 = Analysis line
4 = Result display for MSRA Master (for entire capture buffer)
Channel bar information
The channel bar shows the firmware and measurement information for data acquisition
and global configuration.
Table 2-1: Information displayed in the channel bar for the MSRA Master
Ref Level Reference level
Att RF attenuation
Ref Offset Reference level offset
Freq Center frequency
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Welcome to the MSRA Operating Mode
Understanding the Display Information
AQT Defined measurement time, i.e. the duration of data acquisition to the cap-
ture buffer
Rec Length Defined record length (number of samples to capture)
SRate Defined sample rate for data acquisition
RBW (Spectrum evaluation only) Resolution bandwidth calculated from the
sample rate and record length
In addition, the channel bar also displays information on instrument settings that affect
the measurement results even though this is not immediately apparent from the display
of the measured values (e.g. transducer or trigger settings). This information is displayed only when applicable for the current measurement. For details see the
R&S FSWP Getting Started manual.
Data coverage for each active slave application
Each slave application obtains an extract of the data captured by the MSRA Master
(see also Chapter 5.3, "Multi-Standard Analysis", on page 25). Generally, if a signal
contains data channels for multiple standards, the individual slave applications are
used to analyze the channel for the corresponding standard. Thus, it is of interest to
know which slave application is analyzing which part of the captured data, or more precisely, which data channel. The MSRA Master display indicates the data covered by
each slave application, restricted to the channel bandwidth used by the corresponding
standard, by vertical blue lines labeled with the slave application name. For slave applications that support several standards (e.g. VSA, LTE) an estimated or user-defined
bandwidth is indicated.
2.2.3 MSRA Slave Applications
The data captured by the MSRA Master measurement (or only parts of it) can be evaluated by various slave applications. The measurement channel for each slave application contains the settings and results for the slave application data extract from the
capture buffer.
The following figure shows the screen elements specific to the MSRA slave application
tabs.
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Welcome to the MSRA Operating Mode
Understanding the Display Information
1 = Channel information bar for slave application
2 = Analysis interval for current evaluation
3 = Result display for analysis interval
4 = Analysis line
The display for the individual MSRA slave applications is identical to the display in Signal and Spectrum Analyzer mode except for the following differences:
●
The analysis interval indicates which part of the capture buffer is being evaluated
and displayed in each window.
●
The acquisition time indicated in the channel bar (Meas Time) indicates the analyzed measurement time, not the captured time.
●
Any bandwidth or sample rate values refer to the slave application data, not to the
actual data acquisition from the input signal.
●
The analysis line for time-based displays is only available in MSRA mode. It represents a common time marker in all slave applications whose analysis interval
includes that time (see "Analysis line" on page 26).
For details on the individual slave application displays see the corresponding User
Manuals for those applications.
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3 Measurements and Result Displays
Measurements and Result Displays
MSRA measurement
The only true measurement in MSRA mode in which I/Q data from the input signal is
captured and stored is performed by the MSRA Master. This data acquisition is performed as in the I/Q Analyzer application, i.e. a specified frequency span of the input
signal is swept for a specified measurement time. The captured I/Q data can then be
analyzed in various different applications.
Result displays
The data that was captured by the MSRA Master can be evaluated in various different
applications. All evaluation modes available for the MSRA applications are displayed in
the selection bar in SmartGrid mode.
For details on working with the SmartGrid see the R&S FSWP Getting Started manual.
The result displays available in MSRA mode are those described for the individual
applications. The MSRA Master is implemented as an I/Q Analyzer application and has
the same result displays.
See the R&S FSWP I/Q Analyzer User Manual for a description of the result displays
available for the I/Q Analyzer and thus the MSRA Master.
Measurements in the time and frequency domain
The I/Q Analyzer application (not Master) in MSRA mode can also perform measurements on the captured I/Q data in the time and frequency domain (see also Chap-
ter 5.5, "Measurements in the Time and Frequency Domain", on page 27).
This allows you to perform standard-specific and general power measurements (such
as ACLR or SEM) or statistical evaluations, as well as analyzing the EVM or modulation accuracy, on the same captured I/Q data.
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Measurements and Result Displays
Time and frequency-based measurements are configured using the same settings and
provide similar results as in the Spectrum application. In addition, the analysis interval
used for the measurement is indicated as in all MSRA applications.
The time and frequency domain measurements and the available results are described
in detail in the R&S FSWP User Manual.
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4 Applications and Operating Modes
Applications and Operating Modes
The R&S FSWP provides several applications for different analysis tasks and different
types of signals, e.g. W-CDMA, I/Q analysis or basic spectrum analysis. When you
activate an application, a new measurement channel is created which determines the
measurement settings for that application. The same application can be activated with
different measurement settings by creating several channels for the same application.
Each channel is displayed in a separate tab on the screen.
The maximum number may be limited further by the available memory on the instrument.
Independent vs correlating measurements
With the conventional R&S FSWP Signal and Spectrum Analyzer you can perform
several different measurements almost simultaneously. However, the individual measurements are independent of each other - each application captures and evaluates
its own set of data, regardless of what the other applications do.
In some cases it may be useful to analyze the exact same input data using different
applications. For example, imagine capturing data from a base station and analyzing
the RF spectrum in the Analog Demodulation application. If a spur or an unexpected
peak occurs, you may want to analyze the same data in the I/Q Analyzer to see the
real and imaginary components of the signal and thus detect the reason for the irregular signal. Normally when you switch to a different application, evaluation is performed
on the data that was captured by that application, and not the previous one. In our
example that would mean the irregular signal would be lost. Therefore, a second operating mode is available in the R&S FSWP: Multi-Standard Radio Analyzer (MSRA)
mode.
Multi-Standard Radio Analyzer mode
In Multi-Standard Radio Analyzer (MSRA) mode, data acquisition is performed once
as an I/Q measurement by a master application, and the captured data is then evaluated by any number of slave applications for different radio standards. Data acquisition
and global configuration settings are controlled globally, while the evaluation and display settings can be configured individually for each slave application. Using the MultiStandard Radio Analyzer, unwanted correlations between different signal components
using different transmission standards can be detected. Thus, for example, an irregularity in a GSM burst can be examined closer in the R&S FSWP 3G FDD BTS (WCDMA) slave application to reveal dependencies like a change in the EVM value.
Distinct operating modes
Although the applications themselves are identical in all operating modes, the handling
of the data between applications is not. Thus, the operating mode determines which
slave applications are available and active. Whenever you change the operating mode,
the currently active measurement channels are closed. The default operating mode is
Signal and Spectrum Analyzer mode; however, the presetting can be changed.
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4.1 Available Slave Applications
Applications and Operating Modes
Available Slave Applications
Remote command:
INST:MODE MSR, see INSTrument:MODE on page 71
Switching between applications
When you switch to a new application, a set of parameters is passed on from the current application to the new one:
●
center frequency and frequency offset
●
reference level and reference level offset
●
attenuation
After initial setup, the parameters for the measurement channel are stored upon exiting
and restored upon re-entering the channel. Thus, you can switch between applications
quickly and easily.
Not all options available for the R&S FSWP are supported as slave applications in the
MSRA mode. The supported slave applications are listed here. Note that some of the
applications are provided with the base unit, while others are available only if the corresponding firmware options are installed.
Currently, only applications for base-station tests and those that process I/Q data are
supported in MSRA mode, in particular:
I/Q Analyzer.................................................................................................................. 19
Analog Demodulation....................................................................................................19
Pulse Measurements.................................................................................................... 20
Vector Signal Analysis (VSA)........................................................................................20
I/Q Analyzer
The I/Q Analyzer slave application provides measurement and display functions for I/Q
signals. Evaluation of the captured I/Q data in the frequency and time domain is also
possible.
For details see the R&S FSWP I/Q Analyzer User Manual.
Remote command:
INST:SEL IQ, see INSTrument[:SELect] on page 72
Analog Demodulation
The Analog Demodulation slave application requires an instrument equipped with the
corresponding optional software. This slave application provides measurement functions for demodulating AM, FM, or PM signals.
For details see the R&S FSWP Analog Demodulation User Manual.
Remote command:
INST:SEL ADEM, see INSTrument[:SELect] on page 72
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Applications and Operating Modes
Selecting the Operating Mode and Slave Applications
Pulse Measurements
The Pulse slave application requires an instrument equipped with the Pulse Measurements option, R&S FSWP-K6. This slave application provides measurement functions
for pulsed signals.
For details see the R&S FSWP-K6 User Manual.
Remote command:
INST:SEL PULSE, see INSTrument[:SELect] on page 72
Vector Signal Analysis (VSA)
The VSA slave application requires an instrument equipped with the Vector Signal
Analysis option, R&S FSWP-K70. This slave application provides measurements and
evaluations for single-carrier digitally modulated signals.
For details see the R&S FSWP VSA User Manual.
Remote command:
INST:SEL DDEM, see INSTrument[:SELect] on page 72
4.2 Selecting the Operating Mode and Slave Applications
Access: [MODE]
The default operating mode is Signal and Spectrum Analyzer mode, however, the presetting can be changed.
(See the "Instrument Setup" chapter in the R&S FSWP User Manual).
Switching the operating mode.......................................................................................20
Selecting an MSRA slave application........................................................................... 20
└ New Channel.................................................................................................. 20
└ Replace Current Channel............................................................................... 21
Closing an application...................................................................................................21
Switching the operating mode
To switch the operating mode, select the corresponding tab (see Chapter 2.1, "Starting
the MSRA operating mode", on page 9).
Remote command:
INSTrument:MODE on page 71
Selecting an MSRA slave application
To start a new or replace an existing slave application, select the corresponding button
in the correct tab.
Remote command:
INSTrument[:SELect] on page 72
New Channel ← Selecting an MSRA slave application
The slave application selected on this tab is started in a new channel, i.e. a new tab in
the display.
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Applications and Operating Modes
Using the Sequencer in MSRA Mode
Remote command:
INSTrument:CREate[:NEW] on page 69
INSTrument[:SELect] on page 72
Replace Current Channel ← Selecting an MSRA slave application
The slave application selected on this tab is started in the currently displayed channel,
replacing the current slave application.
Remote command:
INSTrument:CREate:REPLace on page 69
Closing an application
To close an application, simply close the corresponding tab by selecting the "x" next to
the channel name.
Remote command:
INSTrument:DELete on page 70
4.3 Using the Sequencer in MSRA Mode
When you switch to MSRA mode, the Sequencer is automatically activated in continuous mode. Unless it is stopped or you select a different Sequencer mode, the
R&S FSWP will continuously perform a data acquisition (MSRA Master), then evaluate
the data in the active slave applications one after the other, then repeat the data acquisition and evaluate the new data etc. The tabs are updated after each measurement or
evaluation. This behaviour is identical to Signal and Spectrum Analyzer mode (also for
Single Sequence or Channel-Defined Sequence modes).
However, if you switch the Sequencer off, the behaviour of the sweep functions is
slightly different to Signal and Spectrum Analyzer mode (see also "Performing sweeps"
on page 24):
●
If continuous sweep is active (default) and you switch to a different slave application, continuous sweep is aborted. This is necessary in order to evaluate the same
data in different slave applications without overwriting the data in the capture buffer. Continuous sweep can be started again as usual.
●
Only the slave application that is currently displayed when a measurement is performed is updated automatically. A new "Refresh" function is available to update
the display in one or all other slave applications.
For details on the Sequencer function see the R&S FSWP User Manual.
The "Sequencer" menu is available from the toolbar.
Sequencer State
Activates or deactivates the Sequencer. If activated, sequential operation according to
the selected Sequencer mode is started immediately.
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Applications and Operating Modes
Using the Sequencer in MSRA Mode
Remote command:
SYSTem:SEQuencer on page 104
INITiate:SEQuencer:IMMediate on page 102
INITiate:SEQuencer:ABORt on page 102
Sequencer Mode
Defines how often which measurements are performed. The currently selected mode
softkey is highlighted blue. During an active Sequencer process, the selected mode
softkey is highlighted orange.
"Single Sequence"
Each measurement is performed once, until all measurements in all
active channels have been performed.
"Continuous Sequence"
The measurements in each active channel are performed one after
the other, repeatedly, in the same order, until sequential operation is
stopped.
This is the default Sequencer mode.
"Channel Defined Sequence"
First, a single sequence is performed. Then, only channels in continuous sweep mode are repeated.
Remote command:
INITiate:SEQuencer:MODE on page 102
Refresh All
This function is only available if the Sequencer is deactivated, no sweep is currently
running, and only in MSRA mode.
The data in the capture buffer is re-evaluated by all active slave applications, for example after a new sweep was performed while the Sequencer was off.
Note: To update only the displays in the currently active slave application, use the
"Refresh" function in the "Sweep" menu for that slave application (see "Refresh (MSRA
only)" on page 52).
Remote command:
INITiate:SEQuencer:REFResh[:ALL] on page 103
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5 MSRA Basics
5.1 Configuration
MSRA Basics
Configuration
Some background knowledge on basic terms and principles used in MSRA operating
mode is provided here for a better understanding of the required configuration settings.
Master parameters
In MSRA mode, only the MSRA Master performs a data acquisition. Thus, all parameters that determine how the I/Q data is captured from the I/Q channel can only be configured in the MSRA Master tab. In all slave application tabs, these settings are deactivated (or have a different meaning).
Typical master parameters include:
●
Sample rate
●
Record length
●
Bandwidth
●
Center frequency
●
Reference level
●
Trigger settings
●
External reference
●
Impedance, preamplification, attenuation
Channel-specific parameters
Each slave application, however, can define all parameters concerning analysis individually.
Typical channel-specific parameters include:
●
Center frequency, duration and number of trace points for the slave application
data extract
●
Offset of the slave application data extract from the trigger event
●
Evaluation methods
●
Range and scaling
●
Trace mode
●
Marker positions
Conflicting parameters
Master and channel-specific parameters can be configured independantly of one
another, in any order that is convenient to you. However, there are dependencies
between the parameters, as the slave applications can only evaluate data that has
been captured by the MSRA Master previously. Thus, configuring parameters is not
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5.2 Data Acquisition
MSRA Basics
Data Acquisition
restricted, but you are informed about the violation of possible restrictions by error
messages in the status bar of the slave applications where necessary.
As mentioned before, only the MSRA Master performs a data acquisition. Thus, the
MSRA Master defines the center frequency, sample rate and record length of the captured I/Q data. It also defines the trigger event, thus all slave applications have the
same trigger. However, an offset from the trigger can be defined by the individual slave
applications (see "Trigger offset vs. capture offset" on page 26).
Performing sweeps
When you switch to MSRA mode, the Sequencer is automatically activated in continuous mode. The MSRA Master continuously performs a data acquisition. If any slave
applications are activated, then after each measurement, the data in the active slave
applications is evaluated one after the other. The MSRA Master will then repeat the
data acquisition and evaluate the new data etc. The channel displays are updated after
each measurement or evaluation.
Alternatively, you can perform measurements manually. You can start a single or continuous sweep from any slave application, which updates the data in the capture buffer
and the results in the current slave application. The results in the other slave applications, however, remain unchanged. You must refresh them manually, either individually
or all at once, using a "Refresh" function.
Note that in continuous sweep mode, sweeping is aborted when you switch to a different slave application. You can then continue sweeping from there. This is necessary
in order to evaluate the same data in different slave applications without overwriting the
data in the capture buffer.
In single sweep mode, only one sweep is performed; a sweep count is not available neither for the MSRA Master, nor for the slave applications. However, depending on
the slave application, a statistics count may be available for statistics based on a single
data acquisition. Trace averaging is performed as usual for sweep count = 0, the current trace is averaged with the previously stored averaged trace.
Data availability
The slave applications can only receive data that is available in the capture buffer. As
soon as data has been stored to the capture buffer successfully, a status bit (#9) in the
STAT:OPER register is set. If the required slave application data is not available, an
error message is displayed. Details on restrictions are described in Chapter 5.4,
"Restrictions for Slave Applications", on page 26.
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5.3 Multi-Standard Analysis
MSRA Basics
Multi-Standard Analysis
Slave application data
The slave applications receive data for analysis from the capture buffer, if necessary
resampled or with filters applied. The slave applications can define their own center
frequency, sample rate and record length for their slave application data, which is an
extract of the capture buffer data. The slave applications may not request more
sample points than the captured data contains, or samples from a frequency outside
the range of the capture buffer, for example.
Generally, if a signal contains data channels for multiple standards, the individual slave
applications are used to analyze the channel for the corresponding standard. Thus, it is
of interest to know which slave application, or more precisely: which data channel is
analyzing which part of the captured data and how each data channel is correlated (in
time) to others.
The MSRA Master display indicates the data covered by each slave application,
restricted to the channel bandwidth used by the corresponding standard, by vertical
blue lines labeled with the slave application name. For slave applications that support
several standards (e.g. VSA, LTE) an estimated or user-defined bandwidth is indicated.
Figure 5-1: MSRA Master indicating covered bandwidth for 4 slave applications
Analysis interval
Each slave application receives an extract of the data from the capture buffer. However, the individual evaluation methods of the slave application need not analyze the
complete data range. Some slave applications allow you to select a specific part of the
data for analysis, e.g. an individual frame, burst or pulse, or to use an offline trigger
that defines an additional offset to the capture offset. The data range that is actually
analyzed is referred to as the analysis interval.
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MSRA Basics
Restrictions for Slave Applications
The analysis interval is indicated in the window title bar for each evaluation, and can be
queried via remote control.
For slave applications that do not allow you to restrict the evaluation range (e.g. I/Q
Analyzer, Analog Demodulation), the analysis interval is identical to the slave application data extract.
Trigger offset vs. capture offset
The beginning of the capture buffer is defined by the trigger event and the trigger offset. The trigger source is defined by the MSRA Master, which means that all channels
use the same trigger. However, each slave application might need a different trigger
offset or a different number of pretrigger samples. Instead of a trigger offset, the slave
applications define a capture offset. The capture offset is defined as an offset to the
beginning of the capture buffer.
Thus, the beginning of the slave application data extract is calculated as:
[time of trigger event] + [trigger offset] + [capture offset]
Note that while the trigger offset value may be negative, thus starting before the trigger
event, the capture offset may not. A negative capture offset would mean the slave
application data would start before the first sample of the capture buffer. The (pre-)trigger offset in the MSRA Master must be configured such that the required number of
pre-trigger samples for the slave applications are available.
Analysis line
A frequent question when analyzing multi-standard radio 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 slave applications. It can be
positioned in any MSRA slave application or the MSRA Master and is then adjusted in
all other slave applications. Thus, you can easily analyze the results at a specific time
in the measurement in all slave applications and determine correlations (e.g. crosstalk).
If the marked point in time is contained in the analysis interval of the slave 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 or not 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
5.4 Restrictions for Slave Applications
As mentioned in various contexts before, the MSRA slave applications themselves are
identical to Signal and Spectrum operating mode, however, the correlation between
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MSRA Basics
Measurements in the Time and Frequency Domain
slave applications and the MSRA Master require some restrictions. Principally, you are
not restricted in setting parameters. However, if any contradictions occur between the
configured capture settings and the analysis settings, error messages are displayed in
the status bar of the slave application and an icon ( ) is displayed next to the channel
label. However, it does not matter in which order you configure the settings - you will
not be prevented from doing so.
In particular, the following restrictions apply to slave applications in MSRA mode:
●
Data acquisition: parameters related to data acquisition can only be configured by
the MSRA Master
●
Slave application data: only data contained in the capture buffer can be analyzed
by the slave application; this implies the following restrictions:
– Center frequency: must lie within the captured data bandwidth
– Measurement time/Record length: must be smaller than or equal to the val-
ues of the MSRA Master
– Capture offset: must be smaller than the record length of the MSRA Master
– Trace averaging: only for sweep count = 0
●
AUTO SET functions: in slave applications, only the frequency can be adjusted
automatically; all other adjustment functions require a new data acquisition
General restrictions concerning sample rates and maximum usable I/Q bandwidths for
I/Q data also apply in MSRA mode; see the R&S FSWP I/Q Analyzer User Manual for
details.
5.5 Measurements in the Time and Frequency Domain
The I/Q Analyzer slave application (not Master) in multistandard mode can also perform measurements on the captured I/Q data in the time and frequency domain. In
order to do so, the I/Q Analyzer performs an FFT sweep on the captured I/Q data, providing power vs frequency results, or uses the RBW filter to obtain power vs time (zero
span) results. This data is then used for the common frequency or time domain measurements provided by the R&S FSWP Spectrum application, such as ACLR, SEM or
CCDF.
Configuration
Apart from the data capturing process, the measurements are identical in the Spectrum
and I/Q Analyzer slave applications. They are configured using the same settings and
provide the same results. The "Magnitude" result display in the I/Q Analyzer, for
instance, will principally show the same results as the zero span measurement for the
same data. However, while the "Magnitude" evaluation is configured by the I/Q analysis bandwidth and the measurement time, the zero span measurement is configured by
the center frequency, RBW and sweep time settings. Internally, these "time domain"
settings are converted to the required I/Q settings by the I/Q Analyzer.
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MSRA Basics
Measurements in the Time and Frequency Domain
The time and frequency domain measurements and the required settings are described in detail in the R&S FSWP User Manual.
Limitations
However, since the data in the I/Q Analyzer slave application is captured by the Master, independently of the specific time or frequency measurement requirements concerning the RBW, filter type and number of sweep points in the slave application, some
restrictions may apply to these measurements in the I/Q Analyzer. If not enough samples are available in the captured and converted I/Q data, for example, an error message is displayed in the slave application.
The maximum span for a frequency sweep on I/Q-based data corresponds to the
maximum I/Q bandwidth.
The maximum resolution bandwidth (RBW) is 1 MHz.
Furthermore, the following functions are not available for time and frequency domain
measurements in multistandard mode:
●
Marker demodulation
●
Frequency counter marker
●
Gated measurement
●
Video trigger
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6 Configuration
Configuration
Access: [MODE] > "Multi Standard Radio Analyzer" tab
MSRA is a special operating mode on the R&S FSWP.
When you switch the operating mode of a measurement channel to MSRA mode the
first time, the Sequencer is automatically activated in continuous mode (see Chap-
ter 4.3, "Using the Sequencer in MSRA Mode", on page 21), starting an I/Q Analyzer
data acquisition with the default settings (but with a "Spectrum" result display). The "I/Q
Analyzer" menu is displayed, providing access to the most important configuration
functions.
Configuring the MSRA Master
The MSRA Master is the only channel that captures data. It also controls global configuration settings for all slave applications. Thus, all settings that refer to data acquisition
can only be configured in the MSRA Master tab. These settings are deactivated in the
configuration overviews and dialog boxes for all slave application channels. All other
settings, e.g. concerning the evaluated data range, the display configuration or analysis, can be configured individually for each slave application and the Master.
Restrictions
Note that although some restrictions apply to parameters that affect both the MSRA
Master and slave applications (see Chapter 5.4, "Restrictions for Slave Applications",
on page 26), it does not matter in which order you configure them. If any contradictions
occur between the captured data and the data to be evaluated, error messages are
displayed in the status bar of the slave application and an icon (
next to the channel label. However, you will not be prevented from configuring contradictory settings.
Importing and Exporting I/Q Data
The I/Q data to be evaluated in the I/Q Analyzer application can not only be captured
by the MSRA Master itself, it can also be imported to the R&S FSWP, provided it has
the correct format. Furthermore, the captured I/Q data from the MSRA Master can be
exported for further analysis in external applications.
For details see the R&S FSWP I/Q Analyzer and I/Q Input User Manual.
Configuring an I/Q Analyzer as an MSRA slave application
Access: [MODE] > "Multi Standard Radio Analyzer" tab > "Select Meas"
In principle, the I/Q Analyzer in MSRA mode is configured as in Signal and Spectrum
Analyzer mode.
or ) is displayed
However, the I/Q Analyzer slave application (not Master) in MSRA mode can also perform measurements on the captured I/Q data in the time and frequency domain (see
also Chapter 5.5, "Measurements in the Time and Frequency Domain", on page 27).
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Configuration
Configuration Overview
You can select which type of measurement is to be performed: conventional I/Q data
analysis or a time or frequency domain measurement.
The common measurements as in the Spectrum application are available. In addition,
"IQ Analyzer" is provided under "Basic Measurements" to return to the default I/Q
Analysis functions.
The time and frequency domain measurements and the required settings are described in detail in the R&S FSWP User Manual. Further configuration of the I/Q Analyzer
slave application is described in the R&S FSWP I/Q Analyzer and I/Q Input User Manual.
The following chapters describe configuration for the MSRA Master.
● Configuration Overview...........................................................................................30
● Input Source Settings..............................................................................................32
● Amplitude................................................................................................................ 35
● Frequency Settings................................................................................................. 39
● Trigger Settings.......................................................................................................41
● Data Acquisition and Bandwidth Settings............................................................... 46
● Output Settings....................................................................................................... 53
● Display Configuration..............................................................................................54
● Automatic Settings.................................................................................................. 54
6.1 Configuration Overview
Access: all menus
Throughout the measurement channel configuration, an overview of the most important
currently defined settings is provided in the "Overview"
Figure 6-1: Configuration Overview for MSRA Master
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