R&S®SMW-K555
Bandwidth Extension
User Manual
(;ÝÇÚ2)
1179577602
Version 01
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: +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.
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.
R&S®SMW-K555
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
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 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
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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
Contents
List of commands................................................................................ 44
Index......................................................................................................45
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1 Welcome to the Bandwidth Extension option
Welcome to the Bandwidth Extension option
Accessing the Bandwidth Extension dialog
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 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 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 Configuration".
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".
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1.3 Documentation overview
1.3.1 Getting started manual
1.3.2 User manuals and help
Welcome to the Bandwidth Extension 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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1.3.5 Instrument security procedures
1.3.6 Printed safety instructions
1.3.7 Data sheets and brochures
Welcome to the Bandwidth Extension 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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1.4 Scope
Welcome to the Bandwidth Extension 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 Bandwidth Extension option
2.1 Required options
About the Bandwidth Extension option
About Bandwidth Extension
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 bandwidths 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 baseband signal overlap. The figure Figure 2-1 illustrates the superposition of two adjacent
baseband signals band A (bandwidth f
width f
, center frequency f
BW B
c B
).
, center frequency f
BW A
) and band B (band-
c A
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About the Bandwidth Extension option
Figure 2-1: Bandwidth extension without phase corrections
A = Band A
B = Band B
f
= Bandwidth band A
BW A
f
= Bandwidth band B
BW B
fBW= Extended bandwidth of band A and band B
f
= Center frequency band A
c A
f
= Center frequency band B
c B
fc= Center frequency of band A and band B
fOL= Bandwidth overlap between band A and band B
About Bandwidth Extension
Ideally, the resulting baseband signal has an extended bandwidth fBW = f
BW A
+ f
BW 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
f
= Center frequency band A
c A
f
= Center frequency band B
c 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-
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About the Bandwidth Extension option
About Bandwidth Extension
band signal source that is the R&S SMW. For test setups, see Chapter 3.1, "Test set-
ups", on page 12.
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3 Extending the bandwidth
3.1 Test setups
Extending the bandwidth
Test setups
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
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 correct 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 example, 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:
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3.1.1 Single R&S SMW with sensor
Extending the bandwidth
Test setups
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
This test setup includes a single R&S SMW, a power combiner, a directional coupler, a
power sensor and the device under test (DUT).
RF A
R&S SMW
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
RF B
BW 1
BW 2
∑ BW
+
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).
Coupler DUT
Power
sensor
RF A
R&S SMW
LAN
Figure 3-2: Test setup: R&S
RF B
BW 1
+
BW 2
SMW with signal analyzer
∑ BW
DUTCoupler
Analyzer
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Extending the bandwidth
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 following 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
Connecting the R&S
SMW
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.
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