Rohde & Schwarz FSW-K40 User manual

R&S®FSW-K40
Phase Noise Measurements
User Manual
User Manual
1173.9286.02 ─ 15
(;×êä2)

This manual applies to the following R&S®FSW models with firmware version 2.60 and higher:
●R&S®FSW8 (1312.8000K08)
●R&S®FSW13 (1312.8000K13)
●R&S®FSW26 (1312.8000K26)
●R&S®FSW43 (1312.8000K43)
●R&S®FSW50 (1312.8000K50)
●R&S®FSW67 (1312.8000K67)
●R&S®FSW85 (1312.8000K85)
The following firmware options are described:
●R&S FSW-K40 (1313.1397.02)
© 2017 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: [phone] - 0
Fax: [phone]
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 their owners.
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®FSW is indicated as
R&S FSW.

Contents
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Contents
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 Phase Noise Measurement Application................... 9
2.1 Starting the Application................................................................................................9
2.2 Understanding the Display Information....................................................................10
3 Measurements and Result Displays...................................................14
4 Measurement Basics........................................................................... 22
4.1 Spurs and Spur Removal........................................................................................... 22
4.2 Residual Effects.......................................................................................................... 23
4.3 Measurement Range................................................................................................... 24
4.4 Sweep Modes.............................................................................................................. 25
4.5 Trace Averaging.......................................................................................................... 25
4.6 Frequency Determination...........................................................................................27
4.7 Level Determination....................................................................................................30
4.8 Signal Attenuation...................................................................................................... 30
4.9 Using Limit Lines........................................................................................................ 31
4.10 Analyzing Several Traces - Trace Mode....................................................................33
4.11 Using Markers............................................................................................................. 35
5 Configuration........................................................................................36
5.1 Configuration Overview..............................................................................................36
5.2 Default Settings for Phase Noise Measurements.................................................... 37
5.3 Configuring the Frontend...........................................................................................38
5.4 Controlling the Measurement.................................................................................... 40
5.5 Configuring the Measurement Range....................................................................... 43
5.6 Performing Measurements.........................................................................................46
5.7 Configuring In- and Outputs...................................................................................... 48
5.8 Automatic Measurement Configuration....................................................................49
6 Analysis................................................................................................ 51

Contents
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6.1 Configuring Graphical Result Displays.................................................................... 51
6.2 Configure Numerical Result Displays....................................................................... 56
6.3 Using Limit Lines........................................................................................................ 58
6.4 Using Markers............................................................................................................. 65
7 How to Configure Phase Noise Measurements.................................68
7.1 Performing a Basic Phase Noise Measurement.......................................................68
7.2 Customizing the Measurement Range...................................................................... 68
8 Remote Control Commands for Phase Noise Measurements......... 70
8.1 Common Suffixes........................................................................................................70
8.2 Introduction................................................................................................................. 71
8.3 Controlling the Phase Noise Measurement Channel...............................................76
8.4 Performing Measurements.........................................................................................80
8.5 Configuring the Result Display..................................................................................85
8.6 Configuring the Frontend...........................................................................................92
8.7 Controlling the Measurement.................................................................................... 95
8.8 Configuring the Measurement Range....................................................................... 99
8.9 Using Limit Lines...................................................................................................... 106
8.10 Graphical Display of Phase Noise Results............................................................. 116
8.11 Configure Numerical Result Displays..................................................................... 126
8.12 Using Markers........................................................................................................... 139
8.13 Configuring In- and Outputs.................................................................................... 145
8.14 Automatic Measurement Configuration..................................................................146
8.15 Using the Status Register........................................................................................ 147
8.16 Remote Control Example Scripts............................................................................ 153
List of Remote Commands (Phase Noise).......................................159
Index....................................................................................................164

Preface
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1 Preface
1.1 About this Manual
This User Manual provides all the information specific to the application. All general
instrument functions and settings common to all applications and operating modes are
described in the main R&S FSW 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 Phase Noise Application
Introduction to and getting familiar with the application
●Typical applications
Example measurement scenarios in which the application is frequently used.
●Measurements and Result Displays
Details on supported measurements and their result types
●Phase Noise Measurement Basics
Background information on basic terms and principles in the context of the mea-
surement
●Phase Noise Measurement Configuration + Analysis
A concise description of all functions and settings available to configure measure-
ments and analyze results with their corresponding remote control command
●How to Perform Measurements with the Phase Noise Application
The basic procedure to perform each measurement and step-by-step instructions
for more complex tasks or alternative methods
●Measurement Examples
Detailed measurement examples to guide you through typical measurement sce-
narios and allow you to try out the application immediately
●Optimizing and Troubleshooting the Measurement
Hints and tips on how to handle errors and optimize the test setup
●Remote Commands for Phase Noise Measurements
Remote commands required to configure and perform phase noise 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 FSW 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
About this Manual

Preface
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1.2 Documentation Overview
This section provides an overview of the R&S FSW user documentation. You find it on
the product page at:
www.rohde-schwarz.com/manual/FSW
Getting started manual
Introduces the R&S FSW 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.
Online help
The online help offers quick, context-sensitive access to the complete information for
the base unit and the software options directly on the instrument.
User manual
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 FSW is not included.
The online version of the user manual provides the complete contents for immediate
display on the internet.
Service manual
Describes the performance test for checking the rated specifications, module replace-
ment and repair, firmware update, troubleshooting and fault elimination, and contains
mechanical drawings and spare part lists.
The service manual is available for registered users on the global Rohde & Schwarz
information system (GLORIS, https://gloris.rohde-schwarz.com).
Instrument security procedures manual
Deals with security issues when working with the R&S FSW in secure areas.
Basic safety instructions
Contains safety instructions, operating conditions and further important information.
The printed document is delivered with the instrument.
Documentation Overview

Preface
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Data sheet and brochure
The data sheet contains the technical specifications of the R&S FSW. It also lists the
options and their order numbers as well as optional accessories.
The brochure provides an overview of the instrument and deals with the specific char-
acteristics.
See www.rohde-schwarz.com/brochure-datasheet/FSW
Release notes and open source acknowledgment (OSA)
The release notes list new features, improvements and known issues of the current
firmware version, and describe the firmware installation.
The open source acknowledgment document provides verbatim license texts of the
used open source software.
See www.rohde-schwarz.com/firmware/FSW
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/FSW
1.3 Conventions Used in the Documentation
1.3.1 Typographical Conventions
The following text markers are used throughout this documentation:
Convention Description
"Graphical user interface ele-
ments"
All names of graphical user interface elements on the screen, such as
dialog boxes, menus, options, buttons, and softkeys are enclosed by
quotation marks.
KEYS Key names are written in capital letters.
File names, commands,
program code
File names, commands, coding samples and screen output are distin-
guished by their font.
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-
tion marks.
Conventions Used in the Documentation

Preface
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8User Manual 1173.9286.02 ─ 15
1.3.2 Conventions for Procedure Descriptions
When describing how to operate 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 key-
board.
1.3.3 Notes on Screenshots
When describing the functions of the product, we use sample screenshots. These
screenshots are meant to illustrate as much as possible of the provided functions and
possible interdependencies between parameters.
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.
Conventions Used in the Documentation

Welcome to the Phase Noise Measurement Application
R&S®FSW-K40
9User Manual 1173.9286.02 ─ 15
2 Welcome to the Phase Noise Measurement
Application
The R&S FSW-K40 is a firmware application that adds functionality to measure the
phase noise characteristics of a device under test with the R&S FSW signal analyzer.
This user manual contains a description of the functionality that the application pro-
vides, including remote control operation.
Functions that are not discussed in this manual are the same as in the Spectrum appli-
cation and are described in the R&S FSW User Manual. The latest versions of the
manuals are available for download at the product homepage.
http://www2.rohde-schwarz.com/product/FSW.html.
Installation
Find detailed installing instructions in the Getting Started or the release notes of the
R&S FSW.
●Starting the Application............................................................................................. 9
●Understanding the Display Information...................................................................10
2.1 Starting the Application
The phase noise measurement application adds a new type of measurement to the
R&S FSW.
To activate the the Phase Noise application
1. Select the MODE key.
A dialog box opens that contains all operating modes and applications currently
available on your R&S FSW.
2. Select the "Phase Noise" item.
The R&S FSW opens a new measurement channel for the Phase Noise applica-
tion.
All settings specific to phase noise measurements are in their default state.
Multiple Measurement Channels and Sequencer Function
When you enter an application, a new measurement channel is created which deter-
mines the measurement settings for that application. The same application can be acti-
vated with different measurement settings by creating several channels for the same
application.
Starting the Application

Welcome to the Phase Noise Measurement Application
R&S®FSW-K40
10User Manual 1173.9286.02 ─ 15
The number of channels that can be configured at the same time depends on the avail-
able memory on the instrument.
Only one measurement can be performed at any time, namely the one in the currently
active channel. However, in order to perform the configured measurements consecu-
tively, a Sequencer function is provided.
If activated, the measurements configured in the currently active channels are per-
formed one after the other in the order of the tabs. The currently active measurement is
indicated by a symbol in the tab label. The result displays of the individual channels
are updated in the tabs (as well as the "MultiView") as the measurements are per-
formed. Sequential operation itself is independent of the currently displayed tab.
For details on the Sequencer function see the R&S FSW User Manual.
2.2 Understanding the Display Information
The following figure shows the display as it looks for phase noise measurements. All
different information areas are labeled. They are explained in more detail in the follow-
ing sections.
Figure 2-1: Screen layout of the phase noise measurement application
1 = Toolbar
2 = Channel bar
3 = Diagram header
4 = Result display
5 = Softkey bar
6 = Measurement status
7 = Status bar
For a description of the elements not described below, please refer to the Getting Star-
ted of the R&S FSW.
Understanding the Display Information