R&S SMW-K555 User manual

R&S®SMW-K555
Bandwidth Extension
User Manual
1179577602
Version 01
(;ÝÇÚ2)

This document describes the following software options and accessory options:
●R&S®SMW-K555 Bandwidth Extension (1414.6229.xx)
●R&S®SMW-ZKK Combiner Kit 40 GHz (1434.7908.02)
●R&S®SMW-ZKV Combiner Kit 67 GHz (1434.7989.02)
© 2022 Rohde & Schwarz GmbH & Co. KG
Muehldorfstr. 15, 81671 Muenchen, Germany
Phone: [phone] - 0
Email: [email protected]
Internet: www.rohde-schwarz.com
Subject to change – data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1179.5776.02 | Version 01 | R&S®SMW-K555
The following abbreviations are used throughout this manual: R&S®SMW200A is abbreviated as R&S SMW.

Contents
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3User Manual 1179.5776.02 ─ 01
Contents
1 Welcome to the Bandwidth Extension option..................................... 5
1.1 Key features...................................................................................................................5
1.2 Accessing the Bandwidth Extension dialog...............................................................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
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 Bandwidth Extension option...............................................9
2.1 Required options...........................................................................................................9
2.2 About Bandwidth Extension........................................................................................ 9
3 Extending the bandwidth.................................................................... 12
3.1 Test setups...................................................................................................................12
3.1.1 Single R&S SMW with sensor.......................................................................................13
3.1.2 Single R&S SMW with signal analyzer..........................................................................13
3.2 Connecting the R&S SMW..........................................................................................14
3.3 Configuring the R&S SMW......................................................................................... 17
3.4 Generating signals with extended bandwidth..........................................................25
4 Bandwidth Extension settings............................................................28
4.1 General settings.......................................................................................................... 28
4.2 Setup file editor settings............................................................................................ 31
4.2.1 Common settings.......................................................................................................... 31
4.2.2 RF ports settings........................................................................................................... 32

Contents
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4.2.3 Align RF ports configuration settings............................................................................ 34
4.3 Setup info and alignment settings............................................................................ 36
4.4 Align setup wizard settings........................................................................................38
5 Remote control commands.................................................................40
5.1 General commands.....................................................................................................41
5.2 Alignment commands.................................................................................................42
List of commands................................................................................ 44
Index......................................................................................................45

Welcome to the Bandwidth Extension option
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1 Welcome to the Bandwidth Extension option
The R&S SMW-K555 option Bandwidth Extension is a firmware application that allows
extension of the modulation bandwidth to up to 4 GHz.
This user manual contains a description of the functionality that the application pro-
vides, 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 Key features
●Extension of the modulation bandwidth of an RF signal to up to 4 GHz
●Support of ARB output clock rates of up to 4.8 GHz
●Automatic alignment for synchronization of the RF output signal:
– RF ports alignment including local oscillator (LO) phase corrections
– Bandwidth extension setup alignment including RF level corrections and skew
corrections due to different cable lengths
1.2 Accessing the Bandwidth Extension dialog
To open the dialog with Bandwidth Extension settings
1. In the block diagram of the R&S SMW, select "System Config > System Configura-
tion".
2. Select "Multi Instrument > Bandwidth Extension".
The dialog provides general settings for bandwidth extension.
The signal generation is not started immediately. To start signal generation with the
default settings, select "State > On".
Accessing the Bandwidth Extension dialog

Welcome to the Bandwidth Extension option
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1.3 Documentation overview
This section provides an overview of the R&S SMW user documentation. Unless speci-
fied otherwise, you find the documents on the R&S SMW product page at:
www.rohde-schwarz.com/manual/smw200a
1.3.1 Getting started manual
Introduces the R&S SMW and describes how to set up and start working with the prod-
uct. Includes basic operations, typical measurement examples, and general informa-
tion, e.g. safety instructions, etc. A printed version is delivered with the instrument.
1.3.2 User manuals and help
Separate manuals for the base unit and the software options are provided for down-
load:
●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 com-
mands 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 Inter-
net.
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, firm-
ware 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
Documentation overview

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1.3.5 Instrument security procedures
Deals with security issues when working with the R&S SMW in secure areas. It is avail-
able for download on the Internet.
1.3.6 Printed safety instructions
Provides safety information in many languages. The printed document is delivered with
the product.
1.3.7 Data sheets and brochures
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 char-
acteristics.
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 particu-
lar topics.
See www.rohde-schwarz.com/application/smw200a and www.rohde-schwarz.com/
manual/smw200a
Documentation overview

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1.4 Scope
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 appro-
priate.
●General instrument configuration, such as checking the system configuration, con-
figuring 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 instal-
led. Thus, some functions shown in the screenshots may not be available in your par-
ticular product configuration.
Notes on screenshots

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2 About the Bandwidth Extension option
2.1 Required options
The basic equipment layout for Bandwidth Extension includes the options for each
R&S SMW:
●Wideband baseband main module (R&S SMW-B13XT)
●Two path instrument including the following options per instrument path:
– Wideband baseband generator (R&S SMW-B9)
– Baseband extension to 1 GHz RF (R&S SMW-K525)
– Baseband extension to 2 GHz RF (R&S SMW-K527)
●Frequency options:
– First path: Minimum configuration requires R&S SMW-B1012
– Second path: Minimum configuration requires R&S SMW-B2012
●Bandwidth Extension (R&S SMW-K555)
●Optional combiner kit options:
– Combiner Kit 40 GHz (R&S SMW-ZKK)
For RF output frequencies up to 40 GHz
– Combiner Kit 67 GHz (R&S SMW-ZKV)
For RF output frequencies up to 67 GHz
For more information, see data sheet.
2.2 About Bandwidth Extension
Equipped with option R&S SMW-K555, the R&S SMW allows you to extend band-
widths of I/Q modulated signals. A practical approach is to superimpose RF signals
with center frequencies close to each other. The bandwidths of the modulated base-
band signal overlap. The figure Figure 2-1 illustrates the superposition of two adjacent
baseband signals band A (bandwidth fBW A, center frequency fc A) and band B (band-
width fBW B, center frequency fc B).
About Bandwidth Extension

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Figure 2-1: Bandwidth extension without phase corrections
A = Band A
B = Band B
fBW A = Bandwidth band A
fBW B = Bandwidth band B
fBW = Extended bandwidth of band A and band B
fc A = Center frequency band A
fc B = Center frequency band B
fc= Center frequency of band A and band B
fOL = Bandwidth overlap between band A and band B
Ideally, the resulting baseband signal has an extended bandwidth fBW = fBW A + fBW B at
center frequency fc. In reality, destructive interference effects occur at the bandwidth
overlap fOL and result in a signal level drop at fc. To compensate the signal level drop,
phase corrections are added so that signal level of the resulting band A+B is constant
over the whole bandwidth range fBW.
Figure 2-2: Bandwidth extension with phase corrections
A+B = Extended band A+B with corrected overlap
fBW = Extended bandwidth of band A and band B
fc A = Center frequency band A
fc B = Center frequency band B
fc= Center frequency of band A and band B
You can obtain phase correction data, for example, from a coupled alignment source
after combining the baseband signals. The alignment source can be a power sensor or
a spectrum analyzer. Also, this alignment source has direct feedback (LAN) to base-
About Bandwidth Extension

About the Bandwidth Extension option
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11User Manual 1179.5776.02 ─ 01
band signal source that is the R&S SMW. For test setups, see Chapter 3.1, "Test set-
ups", on page 12.
About Bandwidth Extension

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3 Extending the bandwidth
This chapter provides an overview on how to prepare, configure and operate the
R&S SMW for generation of extended bandwidth signals. It covers the following topics:
●Test setups..............................................................................................................12
●Connecting the R&S SMW......................................................................................14
●Configuring the R&S SMW......................................................................................17
●Generating signals with extended bandwidth......................................................... 25
3.1 Test setups
This chapter provides an overview on test setups for bandwidth extension. Test setups
can include one or more R&S SMW vector signal generators. In this description, all test
setups also include a power combiner and a directional coupler.
For alignment of the RF output signal of R&S SMW, you can either use a power sensor
or a vector signal analyzer.
Power combiner
To combine RF signals of your test setup, you have to install a power combiner. For
correct operation, use a power combiner that supports the frequency range of your RF
output signal. For example, use the combiner kit R&S SMW-ZKK, if your test setup
generates RF signals with a maximum frequency of 40 GHz.
Directional coupler
To automate alignment of your test setup, you can use a directional coupler. For cor-
rect operation, use a directional coupler with an output coupling factor that is not higher
than 10 dB. For higher coupling factors, the coupling loss is too large to align power
levels.
Power sensor
To align the power levels for synchronization of the RF output signal ("Align RF Ports"),
use a diode sensor. Using thermal sensors can cause erroneous alignment. For exam-
ple, use a diode sensor of the R&S NRP family. You find the diode sensors on the
product page at:
www.rohde-schwarz.com/product/nrp_s_sn
Signal analyzer
To align the local oscillator (LO) phase for synchronization of the RF output signal
("Align Setup"), use a vector signal analyzer. For correct operation, make sure that this
analyzer supports an analysis bandwidth that fits your RF output signal. For example,
use an R&S FSW equipped with option R&S FSW-B4001 for analysis of up to 4 GHz
bandwidth signals. The minimum required equipment is R&S FSW-B2001 for analysis
of up to 2 GHz bandwidth signals. You find the signal analyzer on the product page at:
Test setups

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www.rohde-schwarz.com/product/fsw
The following test setups are described:
●Single R&S SMW with sensor.................................................................................13
●Single R&S SMW with signal analyzer....................................................................13
3.1.1 Single R&S SMW with sensor
This test setup includes a single R&S SMW, a power combiner, a directional coupler, a
power sensor and the device under test (DUT).
R&S SMW
RF B BW 2
RF A BW 1
∑ BW
+Coupler DUT
SENSOR
Power
sensor
Figure 3-1: Test setup: R&S SMW and power sensor
BW 1 = Bandwidth of the path A output signal
BW 2 = Bandwidth of the path B output signal
Σ BW = Extended bandwidth signal after combining path A and path B output signals
+ = Power combiner
Coupler = Directional coupler
Power sensor = Sensor of the R&S NRP family
SENSOR = Connection between R&S SMW and power sensor
3.1.2 Single R&S SMW with signal analyzer
This test setup includes a single R&S SMW, a power combiner, a directional coupler, a
vector signal analyzer and the device under test (DUT).
R&S SMW
RF B BW 2
RF A BW 1
∑ BW
+DUTCoupler
LAN
Analyzer
Figure 3-2: Test setup: R&S
SMW with signal analyzer
Test setups

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BW 1 = Bandwidth of the path A output signal
BW 2 = Bandwidth of the path B output signal
Σ BW = Extended bandwidth signal after combining path A and path B output signals
+ = Power combiner
Coupler = Directional coupler
Analyzer = Vector signal analyzer, e.g. R&S FSW
LAN = Connection between R&S SMW and vector signal analyzer
3.2 Connecting the R&S SMW
This chapter provides step-by-step descriptions for connecting the R&S SMW with
components and instruments of a bandwidth extension setup. Connecting procedures
for relevant connector types are summarized. Connecting to these connector types is
analogous for all other external frontends. The step-by-step descriptions cover the fol-
lowing topics:
●"To connect a power combiner" on page 14
●"To connect a directional coupler" on page 15
●"To connect an R&S NRP power sensor" on page 16
●"To connect a signal analyzer" on page 17
To connect a power combiner
The following procedure describes how to connect R&S SMW to a power combiner.
Also, it describes how to connect the power combiner and a directional coupler. The
R&S SMW is switched on and connected to power.
For prerequisites of the power combiner, see "Power combiner" on page 12.
1. Use high-quality RF cables.
See "Cable selection and electromagnetic interference (EMI)" in the R&S SMW
Getting Started.
2. Use short RF cables for connection between R&S SMW and power combiner.
3. For correct operation, use one of the following combiner kits:
● R&S SMW-ZKK for RF output signals of up to 44 GHz
● R&S SMW-ZKV for RF output signals of up to 67 GHz
4. Establish the RF connections.
Steps (d) and following of the step-by-step description assume a connection to an
R&S SMW-ZKV combiner kit. Connecting other power combiners is analogous.
a) Ensure that the RF connector of the R&S SMW is compatible with the RF con-
nectors of the power combiner and the directional coupler.
b) Inspect the RF connectors carefully. Look for metal particles, contaminants and
defects.
If an RF connector is damaged, do not proceed, because the risk of damaging
the mating connector is too high.
Connecting the R&S SMW

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c) Connect the RF cables.
See chapter "Connecting to RF" in the R&S SMW Getting Started.
d) First, start connecting the cable ends with the power combiner.
e) Connect both the cable ends with the RF output connectors of the R&S SMW.
The figure below shows a power combiner connected to both RF connectors of
a single R&S SMW.
f) Connect the power combiner with the directional coupler.
The table below provides an overview of the RF connections.
Signal R&S SMW Power combiner Directional coupler
RF "RF A"
"RF B"
RF In: Direction from
R&S SMW
RF Out: Direction to
directional coupler
RF In: Direction from
the power combiner
To connect a directional coupler
Use a directional coupler to automate alignment.
Connecting the R&S SMW

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For prerequisites of the directional coupler, see "Directional coupler" on page 12.
► Establish the RF connections to the directional coupler as described in the other
step-by-step instructions:
● Direction from the power combiner: "To connect a power combiner" on page 14
● Direction to the measurement device:
Sensor: "To connect an R&S NRP power sensor" on page 16
Analyzer: "To connect a signal analyzer" on page 17
To connect an R&S NRP power sensor
The following procedure describes how to connect R&S SMW to an R&S NRP power
sensor as alignment source. Also, it describes how to connect the power sensor and a
directional coupler. The R&S SMW is switched on and connected to power.
For prerequisites of the power sensor, see "Power sensor" on page 12.
1. NOTICE! Cable selection. Use all cables delivered with the R&S NRP power sen-
sor. Other connections can require additional cables.
For the control connection, use the cable R&S NRP-ZK6 as delivered with the
R&S NRP power sensor.
For the RF connection, use a high-quality cable.
See "Cable selection and electromagnetic interference (EMI)" in the R&S SMW
Getting Started.
2. Insert the host connector of the power sensor into the "SENSOR" of the
R&S SMW.
3. Establish the RF connection between power sensor and directional coupler.
a) Ensure that the RF connector of the directional coupler is compatible with the
RF connector of the power sensor.
b) Inspect both RF connectors carefully. Look for metal particles, contaminants
and defects.
If either RF connector is damaged, do not proceed, because the risk of damag-
ing the mating connector is too high.
c) Insert the RF connector of the power sensor straight into the RF output of the
directional coupler. Take care not to tilt it.
The table below provides an overview of the connections.
Signal R&S SMW Power sensor Directional coupler
Sensor control "SENSOR" Host connector -
RF - RF connector RF In: Direction from
R&S SMW after power
combiner
RF Out: Direction to
power sensor
For more information, see chapter "Connecting the R&S NRP" in the R&S NRP
Getting Started.
Connecting the R&S SMW

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To connect a signal analyzer
The following procedure describes how to connect R&S SMW and a directional coupler
to an Rohde & Schwarz signal analyzer as alignment source. The R&S SMW and sig-
nal analyzer are switched on and connected to power.
For prerequisites of the signal analyzer, see "Signal analyzer" on page 12.
1. Connect "RF Input 50Ω" connector of the signal analyzer the RF output of the
directional coupler.
2. Establish a LAN connection between R&S SMW and signal analyzer.
How to: Chapter "Connecting to LAN" in the R&S SMW user manual
The table below provides an overview of the connections.
Signal R&S SMW Signal analyzer Directional coupler
LAN "LAN" "LAN" -
RF - "RF Input 50Ω" RF In: Direction from
R&S SMW after power
combiner
RF Out: Direction to
signal analyzer
3.3 Configuring the R&S SMW
This chapter provides an overview on how to configure the R&S SMW for bandwidth
extension. It covers the following topics:
●"To load a bandwidth extension setup" on page 17
●"To manage bandwidth extension setup files" on page 19
●"To align the setup with a signal analyzer" on page 20
●"To monitor the RF ports settings of a single R&S SMW" on page 22
●"To align RF ports with a power sensor" on page 23
●"To align RF ports with a signal analyzer" on page 24
To load a bandwidth extension setup
If you save a configured bandwidth extension setup to a file, you can load this configu-
ration to the R&S SMW.
1. Select "System Configuration" > "Multi Instrument" > Bandwidth Extension".
By default, no setup is loaded. The block diagram of the test setup shows the notifi-
cation "no setup loaded".
2. To load a bandwidth extension file a predefined file, select "Setup".
In the opening file-select dialog, you can select files with file extension *.bwsa.
Configuring the R&S SMW

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The following steps use the file test_4GHz.bwsa. This file provides a configura-
tion for a 4 GHz bandwidth extension setup including a single R&S SMW and a
power combiner.
3. Optionally, preview bandwidth extension setup characteristics in the pane to the
right of the file list.
1 2
3
4
5
Figure 3-3: Test setup preview of file test_4GHz.bwsa
1 = Single R&S SMW using both RF ports "RF A" and "RF B"
2 = Power combiner with two RF inputs and one output
3 = Power combiner output "Ʃ"
4 = Power combiner inputs "In 1" and "In 2"
5 = No directional coupler is active
4. To load the file, click "Select".
The dialog closes and the bandwidth extension setup is displayed in more detail in
the setup info pane.
Configuring the R&S SMW

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6 5 4
21 3
1 = Bandwidth extension state
2 = Bandwidth extension setup file
3 = Alignment info, alignment status and access to setup alignment wizard
4 = Device under test (DUT)
5 = Power combiner
6 = Signal generator block
To manage bandwidth extension setup files
The following procedure describes how to create, edit and save a bandwidth extension
setup file.
1. Open the bandwidth extension setup file-select dialog.
See steps (1) and (2) in "To load a bandwidth extension setup" on page 17.
2. To create a bandwidth extension setup file, proceed as follows:
a) Select "New".
b) Enter the filename.
c) Select "Ok".
The file is created using the default configuration: Single R&S SMW using both
ports and one power combiner.
3. To edit a bandwidth extension setup file, proceed as follows:
a) Select the file.
b) Select "Edit"
The "Bandwidth Extension Setup File Editor" dialog opens with settings to config-
ure RF ports and align the setup. See Chapter 4.2, "Setup file editor settings",
on page 31.
Configuring the R&S SMW

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4. Optionally, configure RF ports.
See "To monitor the RF ports settings of a single R&S SMW" on page 22.
5. Optionally, configure settings for setup alignment.
See "To align RF ports with a power sensor" on page 23.
To align the setup with a signal analyzer
This procedure describes how to execute an alignment of your bandwidth extension
setup. Typically, align the setup once assuming that you do not change the cabling or
connected devices in your setup.
The signal analyzer is switched-on and connected to the R&S SMW via LAN, see "To
connect a signal analyzer" on page 17. For prerequisites of the signal analyzer, see
"Signal analyzer" on page 12.
1. Load a bandwidth extension setup file.
See "To load a bandwidth extension setup" on page 17.
2. In the general settings of the "Bandwidth Extension" side-tab, execute the follow-
ing:
a) Activate bandwidth extension ("State" > "On").
When aligning for the first time, the setup is not aligned. An exclamation mark
displays a non-aligned setup on the "Info / Align" button.
b) Select "Info / Align".
The "Setup Info / Align" dialog opens and displays a non-configured alignment.
3. Select "Align Setup".
The "Align Setup Wizard" dialog opens and guides you through the steps to config-
ure the measurement device, to align power levels and cable lengths.
The measurement device is a signal analyzer.
4. In the "Instrument" list, select you signal analyzer.
If not listed, scan your network to add your signal analyzer.
5. If detected, select the signal analyzer in the "Instrument" selection.
Configuring the R&S SMW