Rohde&Schwarz R&S®SMW200A Slow IQ signal generation user manual User Manual
R&S®SMW-K551
Generation of Digital "Slow IQ"
Signals
User Manual
(;ÚíÎ2)
1176956402
Version 15
This document describes the following software options:
●
R&S®SMW-K551 Slow IQ (1413.9724.xx)
This manual describes firmware version FW 5.00.044.xx and later of the R&S®SMW200A.
© 2021 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: +49 89 41 29 - 0
Email: info@rohde-schwarz.com
Internet: www.rohde-schwarz.com
Subject to change – data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1176.9564.02 | Version 15 | R&S®SMW-K551
The following abbreviations are used throughout this manual: R&S®SMW200A is abbreviated as R&S SMW, R&S®EX-IQ-BOX is
abbreviated as R&S EX-IQ-BOX, R&S®DigIConf is abbreviated as R&S DigIConf; the license types 02/03/07/11/13/16/12 are abbre-
viated as xx.
R&S®SMW-K551
1 Welcome to the R&S SMW-K551 option...............................................5
1.1 Accessing the slow IQ settings................................................................................... 5
1.2 What's new.....................................................................................................................5
1.3 Documentation overview..............................................................................................6
1.3.1 Getting started manual....................................................................................................6
1.3.2 User manuals and help................................................................................................... 6
1.3.3 Tutorials...........................................................................................................................6
1.3.4 Service manual............................................................................................................... 6
1.3.5 Instrument security procedures.......................................................................................7
1.3.6 Printed safety instructions............................................................................................... 7
1.3.7 Data sheets and brochures............................................................................................. 7
Contents
Contents
1.3.8 Release notes and open source acknowledgment (OSA).............................................. 7
1.3.9 Application notes, application cards, white papers, etc...................................................7
1.4 Scope............................................................................................................................. 8
1.5 Notes on screenshots...................................................................................................8
2 About the slow IQ signal generation....................................................9
2.1 Required options and equipment................................................................................ 9
2.2 Principle of generation of signals with reduced speed...........................................10
2.3 Transmission modes...................................................................................................11
2.4 Default stream mapping............................................................................................. 14
2.4.1 Limitations and interdependencies with other parameters............................................15
2.5 Synchronization issues.............................................................................................. 16
3 Slow IQ related settings...................................................................... 17
4 How to generate signals with reduced speed for FPGA tests......... 22
5 Remote control commands.................................................................28
6 Further information..............................................................................29
List of commands................................................................................ 30
Index......................................................................................................31
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R&S®SMW-K551
Contents
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R&S®SMW-K551
1 Welcome to the R&S SMW-K551 option
Welcome to the R&S SMW-K551 option
What's new
The R&S SMW-K551 is a software option that allows you to generate digital signals
with reduced speed. These kind of signals are commonly known as "Slow IQ" signals.
R&S SMW-K551 key features
●
Generation of single stream or multiplexed digital signals with potentially reduced
speed (a.k.a. "Slow IQ")
●
Generation of digital signals with data rate as required by the DUT and as requested by the processing instrument, e.g. R&S EX-IQ-Box
●
Simultaneous output of up to eight digital streams on two digital interfaces
This user manual contains a description of the functionality that the application provides, including remote control operation.
All functions not discussed in this manual are the same as in the base unit and are
described in the R&S SMW user manual. The latest version is available at:
www.rohde-schwarz.com/manual/SMW200A
Installation
You can find detailed installation instructions in the delivery of the option or in the
R&S SMW service manual.
1.1 Accessing the slow IQ settings
To open the dialog with the required settings
1. In the task bar R&S SMW, select the "System Configuration > System Configura-
tion".
A dialog box opens that displays the "Fading/Baseband Configuration" settings.
2. Select "Signal Outputs > Digital Only/Digital Only Multiplexed".
3. Select "Ok".
The signal generation is not started immediately. To start signal generation with the
default settings, select "State > On".
1.2 What's new
This manual describes firmware version FW 5.00.044.xx and later of the
R&S®SMW200A.
Compared to the previous version there are editorial changes only.
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R&S®SMW-K551
1.3 Documentation overview
1.3.1 Getting started manual
1.3.2 User manuals and help
Welcome to the R&S SMW-K551 option
Documentation overview
This section provides an overview of the R&S SMW user documentation. Unless specified otherwise, you find the documents on the R&S SMW product page at:
www.rohde-schwarz.com/manual/smw200a
Introduces the R&S SMW 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.
Separate manuals for the base unit and the software options are provided for download:
●
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.
●
Software option manual
Contains the description of the specific functions of an option. Basic information on
operating the R&S SMW is not included.
The contents of the user manuals are available as help in the R&S SMW. The help
offers quick, context-sensitive access to the complete information for the base unit and
the software options.
All user manuals are also available for download or for immediate display on the Internet.
1.3.3 Tutorials
The R&S SMW provides interactive examples and demonstrations on operating the
instrument in form of tutorials. A set of tutorials is available directly on the instrument.
1.3.4 Service manual
Describes the performance test for checking compliance with rated specifications, firmware update, troubleshooting, adjustments, installing options and maintenance.
The service manual is available for registered users on the global Rohde & Schwarz
information system (GLORIS):
https://gloris.rohde-schwarz.com
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R&S®SMW-K551
1.3.5 Instrument security procedures
1.3.6 Printed safety instructions
1.3.7 Data sheets and brochures
Welcome to the R&S SMW-K551 option
Documentation overview
Deals with security issues when working with the R&S SMW 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.
The data sheet contains the technical specifications of the R&S SMW. 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/smw200a
1.3.8 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/smw200a
1.3.9 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/smw200a and www.rohde-schwarz.com/
manual/smw200a
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R&S®SMW-K551
1.4 Scope
Welcome to the R&S SMW-K551 option
Notes on screenshots
Tasks (in manual or remote operation) that are also performed in the base unit in the
same way are not described here.
In particular, it includes:
●
Managing settings and data lists, like saving and loading settings, creating and
accessing data lists, or accessing files in a particular directory.
●
Information on regular trigger, marker and clock signals and filter settings, if appropriate.
●
General instrument configuration, such as checking the system configuration, configuring networks and remote operation
●
Using the common status registers
For a description of such tasks, see the R&S SMW user manual.
1.5 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 About the slow IQ signal generation
About the slow IQ signal generation
Required options and equipment
Testing of systems that do not support real-time signals requires signals with an artificially reduced speed or the so called "slow I/Q" signals. An example of this kind of system is the FPGA-based hardware emulators.
A typical signal generator generates test signals in real time and with sample rate that
is several times grater than the sample rate such system can handle. Hence, you have
to adjust several signal settings that are often distributed into different dialog boxes.
For example, to change the sampling rate of the baseband signal, to enable downsampling of the output signal, to calculate and configure fading delay and Doppler shifts.
In R&S SMW equipped with option R&S SMW-K551, the generation of the "slow IQ"
signals is a straightforward solution. This section describes how to use the dedicated
functions to generate and output "slow IQ" digital signals with a sampling rate as
required by the device under test (DUT). The signals are generated and upon a
request form a connected R&S®EX-IQ-BOX.
2.1 Required options and equipment
In the following, we assume that the R&S EX-IQ-Box device interface module is connected to the R&S SMW. The inter-operation with other devices is not described.
The requirement and the limitations listed in Limitations and interdependencies with
other parameters apply to any connected further processing device, that supports the
slow I/Q mode.
Required options
The equipment layout for output of digital I/Q signal includes:
●
Option standard baseband generator (R&S SMW-B10) per signal path and
Option baseband main module, with two I/Q paths (R&S SMW-B13T)
●
Two options digital baseband output (R&S SMW-K18)
●
Four options fading simulator (R&S SMW-B14)
(incl. one digital interface DIG I/Q on each FADER board per installed option)
See also Chapter 2.3, "Transmission modes", on page 11.
●
Option MIMO fading (R&S SMW-K74)
●
Option slow IQ (R&S SMW-K551)
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Optional, option multiple entitities (R&S SMW-K76)
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Further options may be required
For more information, see data sheet.
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About the slow IQ signal generation
Principle of generation of signals with reduced speed
Required additional equipment
One digital interface module R&S EX-IQ-Box per digital I/Q interface, each fulfilling the
following requirements:
●
Must have serial number grater then 102000 to support a 200 MHz digital input signal
●
Is controlled by the R&S DigIConf software (Digital Interface Configuration for the
R&S EX-IQ-Box), to be installed on an external PC
●
Is equipped with a single ended or a differential Breakout Board
For more information, see the R&S EX-IQ-Box Operating Manual.
Required cables
●
Per digital interface module R&S EX-IQ-Box:
–
One R&S®SMU-Z6 cable for connecting Rohde & Schwarz digital baseband
interfaces (i.e. to connect the R&S EX-IQ-Box to the DIG IQ interfaces of the
R&S SMW)
– USB cable for connecting the external PC to the R&S EX-IQ-Box
– Suitable cable for connecting the breakout board of the R&S EX-IQ-Box to the
DUT
●
LAN cable for connecting the external PC and the R&S SMW to the LAN
●
Optional, BNC cable, if a trigger signal is required
●
If the test setup requires an external reference frequency is required, additional
BNC cables, whereas one of them shorter than 1m and one T adapter
(see Chapter 2.5, "Synchronization issues", on page 16)
2.2 Principle of generation of signals with reduced speed
In the general case, R&S SMW generates the digital streams according to the selected
"System Configuration". The digital streams are mapped to the available analog RF
and I/Q outputs and to the digital I/Q interfaces. The generated signal can use the
maximum supported data rate (see data sheet). When you connect a further processing instrument to the digital interfaces of the R&S SMW, you define the sample rate of
the generated signal.
Dedicated modes for the generation of digital signals
R&S SMW equipped with the option R&S SMW-K18 provides two additional signal outputs modes, the "Digital Only/Digital Only Multiplexed" modes, dedicated for the generation of digital signals. If option Slow I/Q (R&S SMW-K551) is installed, the R&S SMW
does not output the digital signals continuously but upon a request from a connected
further processing device, usually a R&S EX-IQ-Box. The analog RF and I/Q outputs
are disabled; analog RF can only be generated from external I/Q signal.
Depending on the further processing device, the R&S SMW can use a reduced data
rate.
See also Chapter 2.3, "Transmission modes", on page 11.
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