R&S® FSV-K10
GSM Measurement
Operating Manual
(;ÚÙJ2)
1176752602
Version 07
Operating Manual
This manual describes the following R&S®FSV/FSVA options:
●
R&S FSV-K10 (1310.8055.02)
This manual describes the following R&S FSVA/FSV models with firmware version 3.30 and higher:
●
R&S®FSVA4 (1321.3008K05)
●
R&S®FSVA7 (1321.3008K08)
●
R&S®FSVA13 (1321.3008K14)
●
R&S®FSVA30 (1321.3008K31)
●
R&S®FSVA40 (1321.3008K41)
●
R&S®FSV4 (1321.3008K04)
●
R&S®FSV7 (1321.3008K07)
●
R&S®FSV13 (1321.3008K13)
●
R&S®FSV30 (1321.3008K30)
●
R&S®FSV40 (1321.3008K39/1321.3008K40)
It also applies to the following R&S®FSV models. However, note the differences described in Chapter 1.4,
"Notes for Users of R&S FSV 1307.9002Kxx Models", on page 9.
●
R&S®FSV3 (1307.9002K03)
●
R&S®FSV7 (1307.9002K07)
●
R&S®FSV13 (1307.9002K13)
●
R&S®FSV30 (1307.9002K30)
●
R&S®FSV40 (1307.9002K39/1307.9002K40)
© 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.
1176.7526.02 | Version 07 | R&S® FSV-K10
The following abbreviations are used throughout this manual: R&S®FSV/FSVA is abbreviated as R&S FSV/FSVA.
R&S® FSV-K10
1 Preface.................................................................................................... 5
1.1 Documentation Overview............................................................................................. 5
1.2 Conventions Used in the Documentation...................................................................6
1.3 How to Use the Help System........................................................................................7
1.4 Notes for Users of R&S FSV 1307.9002Kxx Models.................................................. 9
2 Introduction.......................................................................................... 10
3 Instrument Functions GSM................................................................. 11
3.1 Measurements and Result Displays..........................................................................12
3.2 Further Information.....................................................................................................31
3.3 Softkeys and Settings of the GSM Menu.................................................................. 51
Contents
Contents
3.4 FREQ Key.....................................................................................................................82
3.5 AMPT Key.................................................................................................................... 82
3.6 AUTO SET Key.............................................................................................................82
3.7 SWEEP Key..................................................................................................................82
3.8 TRACE Key.................................................................................................................. 82
3.9 TRIG Key...................................................................................................................... 83
3.10 Softkeys of the Marker Menu – MKR Key................................................................. 83
3.11 Softkeys of the Marker to Menu – MKR-> Key..........................................................84
3.12 Softkeys of the Input/Output Menu............................................................................85
4 Remote Commands (GSM)..................................................................87
4.1 Notation........................................................................................................................87
4.2 ABORt Subsystem...................................................................................................... 90
4.3 CALCulate Subsystem................................................................................................90
4.4 CONFigure Subsystem............................................................................................... 94
4.5 DISPlay Subsystem...................................................................................................140
4.6 FETCh Subsystem.................................................................................................... 144
4.7 INITiate Subsystem................................................................................................... 179
4.8 INPut Subsystem.......................................................................................................181
4.9 INSTrument Subsystem............................................................................................184
4.10 MMEMory Subsystem............................................................................................... 185
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4.11 READ Subsystem......................................................................................................187
4.12 SENSe Subsystem.................................................................................................... 227
4.13 STATus Subsystem................................................................................................... 230
4.14 TRACe Subsystem.................................................................................................... 234
4.15 TRIGger Subsystem..................................................................................................236
4.16 Commands for Compatibility................................................................................... 239
4.17 Example for a Measurement Performed via Remote Control............................... 240
5 Status Reporting System.................................................................. 248
5.1 STATus:OPERation Register.................................................................................... 249
5.2 STATus:QUEStionable Register...............................................................................249
5.3 STATus:QUEStionable:SYNC Register....................................................................250
5.4 STATus:QUEStionable:POWer Register..................................................................251
Contents
List of Commands..............................................................................252
Index....................................................................................................259
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1 Preface
1.1 Documentation Overview
1.1.1 Quick Start Guide
Preface
Documentation Overview
This section provides an overview of the R&S FSVA/FSV user documentation. Unless
specified otherwise, you find the documents on the R&S FSVA/FSV product page at:
www.rohde-schwarz.com/manual/FSVA
Introduces the R&S FSVA/FSV 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.
1.1.2 Operating Manuals and Help
Separate operating 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.
●
Firmware application manual
Contains the description of the specific functions of a firmware application. Basic
information on operating the R&S FSVA/FSV is not included.
The contents of the operating manuals are available as help in the R&S FSVA/FSV.
The help offers quick, context-sensitive access to the complete information for the
base unit and the firmware applications.
All operating manuals are also available for download or for immediate display on the
Internet.
1.1.3 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 registered users on the global Rohde & Schwarz
information system (GLORIS, https://gloris.rohde-schwarz.com).
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1.1.4 Instrument Security Procedures
1.1.5 Basic Safety Instructions
1.1.6 Data Sheets and Brochures
Preface
Conventions Used in the Documentation
Deals with security issues when working with the R&S FSVA/FSV 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 FSVA/FSV. It also lists
the firmware applications 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/FSV
1.1.7 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/FSV
1.1.8 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/FSV
1.2 Conventions Used in the Documentation
1.2.1 Typographical Conventions
The following text markers are used throughout this documentation:
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Preface
How to Use the Help System
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.
1.2.2 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.
1.2.3 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.
1.3 How to Use the Help System
Calling context-sensitive and general help
► To display the general help dialog box, press the [HELP] key on the front panel.
The help dialog box "View" tab is displayed. A topic containing information about
the current menu or the currently opened dialog box and its function is displayed.
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Preface
How to Use the Help System
For standard Windows dialog boxes (e.g. File Properties, Print dialog etc.), no contextsensitive help is available.
► If the help is already displayed, press the softkey for which you want to display
help.
A topic containing information about the softkey and its function is displayed.
If a softkey opens a submenu and you press the softkey a second time, the submenu
of the softkey is displayed.
Contents of the help dialog box
The help dialog box contains four tabs:
●
"Contents" - contains a table of help contents
●
"View" - contains a specific help topic
●
"Index" - contains index entries to search for help topics
●
"Zoom" - contains zoom functions for the help display
To change between these tabs, press the tab on the touchscreen.
Navigating in the table of contents
●
To move through the displayed contents entries, use the [UP ARROW] and [DOWN
ARROW] keys. Entries that contain further entries are marked with a plus sign.
●
To display a help topic, press the [ENTER] key. The "View" tab with the corresponding help topic is displayed.
●
To change to the next tab, press the tab on the touchscreen.
Navigating in the help topics
●
To scroll through a page, use the rotary knob or the [UP ARROW] and [DOWN
ARROW] keys.
●
To jump to the linked topic, press the link text on the touchscreen.
Searching for a topic
1. Change to the "Index" tab.
2. Enter the first characters of the topic you are interested in. The entries starting with
these characters are displayed.
3. Change the focus by pressing the [ENTER] key.
4. Select the suitable keyword by using the [UP ARROW] or [DOWN ARROW] keys
or the rotary knob.
5. Press the [ENTER] key to display the help topic.
The "View" tab with the corresponding help topic is displayed.
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1.4 Notes for Users of R&S FSV 1307.9002Kxx Models
Preface
Notes for Users of R&S FSV 1307.9002Kxx Models
Changing the zoom
1. Change to the "Zoom" tab.
2. Set the zoom using the rotary knob. Four settings are available: 1-4. The smallest
size is selected by number 1, the largest size is selected by number 4.
Closing the help window
► Press the [ESC] key or a function key on the front panel.
Users of R&S FSV 1307.9002Kxx models should consider the following differences to
the description of the newer R&S FSVA/FSV 1321.3008Kxx models:
●
Functions that are based on the Windows 10 operating system (e.g. printing or setting up networks) may have a slightly different appearance or require different settings on the Windows XP based models. For such functions, refer to the Windows
documentation or the documentation originally provided with the R&S FSV instrument.
●
The R&S FSV 1307.9002K03 model is restricted to a maximum frequency of
3 GHz, whereas the R&S FSVA/FSV1321.3008K04 model has a maximum frequency of 4 GHz.
●
The bandwidth extension option R&S FSV-B160 (1311.2015.xx) is not available for
the R&S FSV 1307.9002Kxx models. The maximum usable I/Q analysis bandwidth
for these models is 28 MHz, or with option R&S FSV-B70, 40 MHz.
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R&S® FSV-K10
2 Introduction
Introduction
This document contains all information required for operation of an R&S FSVA/FSV
equipped with Application Firmware R&S FSV-K10. It covers operation via menus and
the remote control commands for GSM/EDGE, EDGE Evolution (EGPRS2) and
VAMOS (Voice services over Adaptive Multi-user channels on One Slot) measurements.
This part of the documentation consists of the following chapters:
●
Chapter 3, "Instrument Functions GSM", on page 11
describes the overall instrument functions and provides further information
●
Chapter 4, "Remote Commands (GSM)", on page 87
describes all remote control commands defined for the GSM/EDGE, EDGE Evolution (EGPRS2) and VAMOS measurements.
●
Chapter 5, "Status Reporting System", on page 248
provides a description of the status registers
This part of the documentation includes only functions of the Application Firmware
R&S FSV-K10. For all other descriptions, refer to the description of the base unit.
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3 Instrument Functions GSM
Instrument Functions GSM
The R&S FSVA/FSV equipped with the GSM option performs measurements on downlink or uplink signals according to the Third Generation Partnership Project (3GPP)
standards for GSM/EDGE, EDGE Evolution (EGPRS2) and Voice services over Adaptive Multi-user Channels on One Slot (VAMOS) in different domains (Time, Frequency,
IQ). Signals with GMSK, AQPSK, QPSK, 8PSK, 16QAM and 32QAM modulation, normal or higher symbol rate and different TX filters (e.g narrow and wide pulse) can be
measured. The measurements for Power vs Time, Modulation Accuracy and Modulation and Transient Spectrum as required in the standard can be performed.
The measurements and the physical layer – the layer of the GSM network on which
modulation, transmission of RF signals, reception of RF signals, and demodulation
take place – is defined in the standards:
Table 3-1: GSM standards
●
3GPP TS 45.004
●
3GPP TS 45.005
Details on Modulation
General measurement specifications and limit values
●
3GPP TS 45.010
●
3GPP TS 51.010
●
3GPP TS 51.021
Details on Synchronization and Timing
Detailed measurement specifications and limit values for mobile stations
(MS)
Detailed measurement specifications and limit values for base transceiver
stations (BTS)
To open the GSM menu
●
If the "GSM" mode is not the active measurement mode, press the [MODE] key
and activate the "GSM" option by selecting "GSM".
●
If the "GSM" mode is already active, press the [HOME] key.
The "GSM" menu is displayed.
Menu and softkey description
For a description of the GSM-specific softkeys see Chapter 3.3, "Softkeys and Settings
of the GSM Menu", on page 51.
The "Span", "BW", "Mkr Func", "Lines" menus are not available in GSM mode.
The [UNDO/REDO] functions are not available in GSM mode.
For all menus not described here, see the description of the R&S FSVA/FSV base unit.
To display help to a softkey, press the [HELP] key and then the softkey for which you
want to display help. To close the help window, press the ESC key. For further information refer to section "How to use the Help System".
● Measurements and Result Displays........................................................................12
● Further Information..................................................................................................31
● Softkeys and Settings of the GSM Menu................................................................ 51
● FREQ Key...............................................................................................................82
● AMPT Key...............................................................................................................82
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3.1 Measurements and Result Displays
Instrument Functions GSM
Measurements and Result Displays
● AUTO SET Key.......................................................................................................82
● SWEEP Key............................................................................................................82
● TRACE Key.............................................................................................................82
● TRIG Key................................................................................................................ 83
● Softkeys of the Marker Menu – MKR Key...............................................................83
● Softkeys of the Marker to Menu – MKR-> Key........................................................84
● Softkeys of the Input/Output Menu..........................................................................85
This chapter provides information about the measurement and result displays of the
GSM application.
Multiple measurement mode
The multiple measurement mode allows you to perform several measurements on the
same captured I/Q data in parallel. In this case, the results of the selected measurements are available immediately, without starting a new measurement. Simply select
the softkey for the performed measurement.
To retrieve the results for other measurement types, you must perform a new measurement first. The softkeys for the measurements not included in the multiple measurement selection only become available again when you deactivate multiple measurement mode or include the measurement in the multiple measurement selection.
● Screen Layout.........................................................................................................12
● Modulation Accuracy...............................................................................................13
● Phase Error vs Time............................................................................................... 14
● EVM vs Time...........................................................................................................15
● Magnitude Error vs Time.........................................................................................17
● Constellation........................................................................................................... 18
● Trigger to Sync........................................................................................................19
● Power vs Time........................................................................................................ 20
● Modulation Spectrum.............................................................................................. 24
● Transient Spectrum.................................................................................................27
● Wide Modulation Spectrum.....................................................................................28
3.1.1 Screen Layout
Within the GSM measurement option, each measurement has its own screen layout
(see e.g. Chapter 3.1.8, "Power vs Time", on page 20). This is typically a combination of a graph in the upper screen part and a table in the lower screen part.
You can switch between the screens and select a split screen layout (to see all displays) or a full screen layout (to see only the graph or the table in more detail).
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3.1.2 Modulation Accuracy
Instrument Functions GSM
Measurements and Result Displays
Table content in split screen mode
Due to the reduced space available for each result in split screen mode, the content of
the tables may be reduced.
Via remote control, all results are available in any table state.
The fundamental characteristics of the signal to be analyzed in the vector (IQ) domain
are error vector magnitude (EVM), magnitude and phase error, IQ imbalance, etc. The
numerical readings are displayed in the "Modulation Accuracy" table.
Figure 3-1: Modulation Accuracy
To display a "Modulation Accuracy" table, select: "Demod > Modulation Accuracy" (see
"Modulation Accuracy" on page 76) and then start a measurement ([Run Single]/[Run
CONT] key).
Modulation Accuracy results can be included in multiple measurements (see "Multi
Meas Tab" on page 72). In this case, you do not need to start a new measurement.
If the "Modulation Accuracy" softkey is not available, include "Demod" in the multiple
measurement selection or disable the multiple measurement mode.
The following default settings are used for a "Modulation Accuracy" table.
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%
[%]/
log
100
20
10
offsetQI
OOS
dB
Instrument Functions GSM
Measurements and Result Displays
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Measure" on page 61).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" ("Statis-
tic Count" on page 57).
Limit Check None
Amplitude Droop
The "Amplitude Droop" value shown in the result table indicates the total change in
amplitude (in dB) over the estimation range. The estimation range is set according to
the 3GPP standard:
Burst type Modulation type Estimation Range
Normal burst GMSK 147 normal symbol periods
Normal burst 8PSK, 16QAM and 32 QAM (EGPRS2
Higher Symbol Rate burst QPSK, 16QAM and 32QAM (EGPRS2
Origin Offset Suppression
The relation between the current values of the I/Q offset and the Origin Offset Suppression (OOS) is as follows:
The Origin Offset Suppression value in the "Peak" column displays the minimum value
(not the maximum as for other items), which is the worst case value.
3.1.3 Phase Error vs Time
This measurement displays the phase error over time. The measurement consists of a
graph and a table which is a condensed version of the "Modulation Accuracy" table
(see Chapter 3.1.2, "Modulation Accuracy", on page 13).
142 normal symbol periods
Level A)
169 reduced symbol periods
Level B)
Figure 3-2: Phase Error vs Time graph
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Instrument Functions GSM
Measurements and Result Displays
Figure 3-3: Phase Error values in Modulation Accuracy list
To start a "Phase Error vs Time" measurement, select: "Demod > Phase Error" (see
"Phase Error" on page 77) and then start a measurement ([Run Single]/[Run CONT]
key).
Phase Error vs Time results can be included in multiple measurements (see "Multi
Meas Tab" on page 72). In this case, you do not need to start a new measurement.
If the "Phase Error" softkey is not available, include "Demod" in the multiple measurement selection or disable the multiple measurement mode.
The following default settings are used for a "Phase Error vs Time" measurement.
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings""Statistic
Limit Check None
3.1.4 EVM vs Time
This measurement displays the error vector magnitude over time. The measurement
consists of a graph and a table which is a condensed version of the "Modulation Accuracy" table (see Chapter 3.1.2, "Modulation Accuracy", on page 13).
Measure" on page 61).
Count" on page 57.
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Instrument Functions GSM
Measurements and Result Displays
Figure 3-4: EVM vs Time graph
Figure 3-5: EVM vs Time values in Modulation Accuracy list
To start a "EVM vs Time" measurement, select: "Demod > EVM" (see "EVM"
on page 77) and then start a measurement ([Run Single]/[Run CONT] key).
EVM vs Time results can be included in multiple measurements (see "Multi Meas Tab"
on page 72). In this case, you do not need to start a new measurement.
If the "EVM vs Time" softkey is not available, include "Demod" in the multiple measurement selection or disable the multiple measurement mode.
The following default settings are used for a "EVM vs Time" measurement.
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Measure" on page 61).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 57).
Limit Check None
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3.1.5 Magnitude Error vs Time
Instrument Functions GSM
Measurements and Result Displays
This measurement displays the magnitude error over time. The measurement consists
of a graph and a table which is a condensed version of the "Modulation Accuracy"
table (see Chapter 3.1.2, "Modulation Accuracy", on page 13).
Figure 3-6: Magnitude Error vs Time graph
Figure 3-7: Magnitude Error values in Modulation Accuracy list
To start a "Magnitude Error vs Time" measurement, select: "Demod > Magnitude Error"
(see "Magnitude Error" on page 77) and then start a measurement ([Run Single]/
[Run CONT] key).
Magnitude Error vs Time results can be included in multiple measurements (see "Multi
Meas Tab" on page 72). In this case, you do not need to start a new measurement.
If the "Magnitude Error" softkey is not available, include "Demod" in the multiple measurement selection or disable the multiple measurement mode.
The following default settings are used for a "Magnitude Error vs Time" measurement.
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3.1.6 Constellation
Instrument Functions GSM
Measurements and Result Displays
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Measure" on page 61).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 57).
Limit Check None
This measurement displays the constellation diagram. The measurement consists of a
graph and a table which is a condensed version of the "Modulation Accuracy" table
(see Chapter 3.1.2, "Modulation Accuracy", on page 13).
Figure 3-8: Constellation
To display a "Constellation" diagram, select: "Demod > Constell" (see
"Constell"
on page 77) and then start a measurement ([Run Single]/[Run CONT] key).
Constellation diagrams can be included in multiple measurements (see "Multi Meas
Tab" on page 72). In this case, you do not need to start a new measurement.
If the "Constell" softkey is not available, include "Constellation" in the multiple measurement selection or disable the multiple measurement mode.
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3.1.7 Trigger to Sync
Instrument Functions GSM
Measurements and Result Displays
The Multicarrier BTS option (see "Multicarrier BTS" on page 73) activates an additional multicarrier filter into the demodulation path. For normal bursts with GMSK modulation, the constellation diagram then becomes similar to a 12PSK constellation.
The following default settings are used for a "Constellation" display.
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Measure" on page 61).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 57).
Limit Check None
This measurement measures the time between an external trigger event and the start
of the first symbol of the training sequence. The start of the first symbol corresponds to
the time 0 of the symbol period (see Chapter 3.2.9, "Definition of the Symbol Period",
on page 45).
Figure 3-9: Trigger to Sync
To start a "Trigger to Sync" measurement, select "Demod > More > Trigger to Sync"
(see "Trigger to Sync" on page 77 ). Then start a measurement ([Run Single]/[Run
CONT] key).
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3.1.8 Power vs Time
Instrument Functions GSM
Measurements and Result Displays
Trigger to Sync measurements only provide one value per I/Q capture. In order to
improve the measurement speed, set the capture time to 10 ms (see "Capture Time"
on page 56).
The "Power vs Time" (PvT) measurement is the most important GSM measurement in
the time domain. It displays the power of all slots (bursts) in the selected slot scope
(see Chapter 3.2.7, "Defining the Scope of the Measurement", on page 39) and runs
an evaluation against the specified template mask.
The measurement consists of a graph showing the "Power vs Time" trace including the
limit lines, and a table that displays the slot powers of all slots in the slot scope.
In the graph display, it is possible to focus on different parts of the signal:
●
"Full" on page 78: Displays all bursts in the slot scope
●
"Rising" on page 78: Displays rising edges only (the rest of the burst is removed)
●
"Falling" on page 78: Displays fallling edges only (the rest of the burst is
removed)
●
"Rise & Fall" on page 78: Rising and falling edges zoomed
●
"Top" on page 79: Useful part high resolution (same as "Full" on page 78, but y-
axis zoomed)
To start a "Power vs Time" measurement, select "PvT" and then the required measurement type. Then start a measurement ([Run Single]/[Run CONT] key).
Power vs. Time results can be included in multiple measurements (see "Multi Meas
Tab" on page 72). In this case, you do not need to start a new measurement.
If the "PvT" softkey is not available, include "Power vs. Time" in the multiple measurement selection or disable the multiple measurement mode.
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R&S® FSV-K10
Instrument Functions GSM
Measurements and Result Displays
Figure 3-10: Full Burst view in Power vs Time
Figure 3-11: Rising and Falling Edge view in Power vs Time
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Figure 3-12: Top High Resolution view in Power vs Time
To zoom into the trace in the Power vs Time Full Burst view, activate a marker and use
the marker zoom (see "Marker Zoom" on page 84).
The table displays the following information (see Figure 3-13):
●
The slot powers of all slots in the slot scope (see Chapter 3.2.7, "Defining the
Scope of the Measurement", on page 39. The average power, the peak power
and the crest factor on a per-slot basis are displayed. The table contains results of
the current ("Curr") frame as well as the statistics done over all ("All") analyzed
frames according to the set statistic count.
●
The "Delta to Sync" values correspond to the distance between the center of the
Training Sequence TSC in a given slot and the center of the TSC in the Slot to
Measure. The unit is normal symbol periods (NSP = 1 / Normal Symbol Rate = 6 /
1625000 s = 3.69 us). These values are either assumed to be constant (according
to the 3GPP standard) or measured, depending on the setting of the Limit Time
Alignment parameter ("Slot to measure" or "Per Slot").
Figure 3-13: Power vs Time list display
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Measurements and Result Displays
According to the standard (see "Timeslot length" in 3GPP TS 45.010), there are either
eight slots of equal length (156.25 NSP), or slot 0 and slot 4 have a length of 157 NSP
while all other slots have a length of 156 NSP. For details see Chapter 3.2.10, "Time-
slot Alignment", on page 48.
The timeslot length is defined as the distance between the centers of the TSCs in successive slots. By setting the "Limit Time Alignment" parameter to "Per Slot" the "Delta
to Sync" values can be measured and used in order to verify the timeslot lenghts.
Setting the Limit Time Alignment to "Slot to measure" displays the expected values
(according to the standard and depending on the value of Equal Timeslot Length).
These values are summarized in Table 3-2 (Slot to measure = 0, No. of slots = 8 and
First slot to measure = 0).
Table 3-2: Expected "Delta to Sync" values in normal symbol periods
Slot
Number
Equal
Timeslot
Length =
On
Equal
Timeslot
Length =
Off
0 = Slot
to measure
0 156.25 312.50 468.75 625.00 781.25 937.50 1093.75
0 157 313 469 625 782 938 1094
1 2 3 4 5 6 7
Default measurement settings
The following default settings are used for the "Power vs Time" measurement:
Setting Default
Measurement Scope The slot scope defined by First Slot to measure and Number of Slots to mea-
sure in "Measurement Settings" (see Chapter 3.2.7, "Defining the Scope of the
Measurement", on page 39).
Averaging Configuration Number of frames as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 57)..
Limit Check According to standard.
●
The maximum (Max) trace is checked agains the upper limit.
●
The minimum (Min) trace is checked against the lower limit.
●
The limit masks are generated adaptively from the measured signal
according to the following parameters:
– Frequency band (special masks for PCS1900 and DCS1800 BTS with
GMSK)
– Burst type
– Modulation
– Filter
– The reference burst power is measured and the "0 dB line" of the limit
mask is assigned to it.
– For MS, the "-6 dB line" of the limit mask depends on the PCL. The
PCL is derived from the measured burst power.
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Measurement and Zoom
When switching between Full, Rising, Falling, Rise & Fall, and Top, neither the measurement itself, nor the limit checking is changed. The only change is that the displayed signal data is cropped.
Remote commands
The results of the "Power vs Time" measurement can be queried using the following
remote commands:
FETCh:BURSt:SPOWer:SLOT<s>:ALL:AVERage? on page 168
FETCh:BURSt:SPOWer:SLOT<s>:ALL:CRESt? on page 169
FETCh:BURSt:SPOWer:SLOT<s>:ALL:MAXimum? on page 170
FETCh:BURSt:SPOWer:SLOT<s>:CURRent:AVERage? on page 171
FETCh:BURSt:SPOWer:SLOT<s>:CURRent:CRESt? on page 172
FETCh:BURSt:SPOWer:SLOT<s>:CURRent:MAXimum? on page 173
FETCh:BURSt:SPOWer:SLOT<s>:DELTatosync? on page 174
3.1.9 Modulation Spectrum
The "Modulation Spectrum" measurement evaluates the spectral property (shape and
values at certain fixed frequency offsets) of a certain part of the burst (50 to 90 % of
the useful part, excluding the training sequence TSC) by measuring the average power
in this part over several bursts. The results of this measurement can be displayed in a
graph or list.
The full list of measured frequency and filter bandwidths is provided in Table 3-3.
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Figure 3-14: Frequency Domain of modulation spectrum with traces and limits (red)
Figure 3-15: Results Table in Modulation Spectrum
To start a "Modulation Spectrum" measurement, select: "Spectrum > Modulation Spectrum" (see "Modulation Spectrum" on page 79) and then start a measurement ([Run
Single]/[Run CONT] key).
Modulation Spectrum results can be included in multiple measurements (see "Multi
Meas Tab" on page 72). In this case, you do not need to start a new measurement.
If the "Modulation Spectrum" softkey is not available, include "Modulation Spectrum" in
the multiple measurement selection or disable the multiple measurement mode.
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The following default settings are used for a "Modulation Spectrum" measurement.
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Measure" on page 61).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 57)..
Limit Check According to standard.
Table 3-3: Frequencies and filter bandwidths in modulation spectrum measurements
Offset Frequency (kHz) RBW (kHz) VBW (kHz)
± 100 30 30
± 200 30 30
± 250 30 30
± 400 30 30
± 600 30 30
± 800 30 30
●
Frequency Domain: Limit check of average (Avg) trace
●
List: Limit check of absolute and relative scalar values
●
The limits depend on the following parameters:
– Frequency band
– Device Type (only BTS type, not MS type)
– Burst Type / Modulation / Filter - limits are different for Higher Symbol
Rate and Wide Pulse Filter (case 2) and others (case 1), see 3GPP
TS 45.005, chapter 4.2.1.3
– The measured reference power (30 kHz bandwidth)
– No. of active Carriers for multi-carrier BTS. The limit is relaxed by
10*log10(N) dB for offset frequencies ≥1.8 MHz, see 3GPP TS 45.005
chapter 4.2.1.2
± 1000 30 30
± 1200 30 30
± 1400 30 30
± 1600 30 30
± 1800 30 30
Remote commands
The "Modulation Spectrum" measurement is started using the CONFigure:
SPECtrum:MODulation[:IMMediate] command.
The gating parameters of the "Modulation Spectrum" measurement can be queried
using READ:WSPectrum:MODulation:GATing?.
The results of the "Modulation Spectrum" measurement can be queried using READ:
WSPectrum:MODulation[:ALL]?.
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3.1.10 Transient Spectrum
Instrument Functions GSM
Measurements and Result Displays
The "Transient Spectrum" measurement is done in a very similar way to the modulation
spectrum measurement.
The differences to the modulation spectrum measurement are:
●
Instead of measuring only in the useful part of the burst (in the "Slot to measure",
see "Slot to Measure" on page 61), the measurement is performed over the interval defined by the "Number of slots to measure" (see "Number of Slots to measure"
on page 62) and the "First Slot to measure" (see "First Slot to measure"
on page 62) in the "Measurement Settings", i.e. one measurement per frame.
See also Chapter 3.2.7, "Defining the Scope of the Measurement", on page 39.
Therefore, the rising and falling edges affect the measurement result.
●
Instead of the average power, the peak power is measured.
●
The number of fixed offset frequencies is lower.
Figure 3-16: Frequency Domain of Transient Spectrum with traces and limits (red)
Figure 3-17: Result Table in Transient Spectrum
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To start a "Transient Spectrum" measurement, select: "Spectrum > Transient Spectrum" (see "Transient Spectrum" on page 79) and then start a measurement ([Run
Single]/[Run CONT] key).
Transient Spectrum results can be included in multiple measurements (see "Multi
Meas Tab" on page 72). In this case, you do not need to start a new measurement.
If the "Transient Spectrum" softkey is not available, include "Transient Spectrum" in the
multiple measurement selection or disable the multiple measurement mode.
The following default settings are used for "Transient Spectrum" measurements.
Setting Default
Measurement Scope The slot scope defined by First Slot to measure and Number of Slots to mea-
sure in "Measurement Settings" (see Chapter 3.2.7, "Defining the Scope of the
Measurement", on page 39).
Averaging Configuration Number of frames as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 57).
Limit Check According to standard.
●
Frequency Domain: Limit check of maximum (Max) trace
●
List: Limit check of absolute and relative scalar values
●
The limit masks are generated adaptively from the measured signal.
●
The limits depend on the following parameters:
– Frequency band (not for MS)
– Burst Type / Modulation / Filter (not for MS)
– The measured reference (burst) power
3.1.11 Wide Modulation Spectrum
The "Wide Modulation Spectrum" measurement measures the spectrum due to modulation at offset frequencies up to 6 MHz from the carrier. In principle, this measurement
provides the same functionality as the existing "Modulation Spectrum List" measurement (see Chapter 3.1.9, "Modulation Spectrum", on page 24), however the measured
offset frequencies are extended past the current limit of 1.8 MHz up to 6 MHz. The full
list of measured frequencies and filter bandwidths are listed in Table 3-4.
Contrary to the "Modulation Spectrum" measurement, the "Wide Modulation Spectrum"
measurement uses a series of gated zero-span measurements. This approach provides improved measurement dynamics compared to the "Modulation Spectrum"
approach that is based on captured I/Q data.
To start a "Wide Modulation Spectrum" measurement, select "Wide Spectrum > Wide
Mod Spectrum" (see "Wide Mod Spectrum" on page 80).
Wide modulation spectrum measurements are not available for signals from the Digital
Baseband Interface (R&S FSV-B17).
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Table 3-4: Frequencies and filter bandwidths in wide modulation spectrum measurements
Offset Frequency (kHz) RBW (kHz) VBW (kHz)
± 100 30 30
± 200 30 30
± 250 30 30
± 400 30 30
± 600 30 30
± 800 30 30
± 1000 30 30
± 1200 30 30
± 1400 30 30
± 1600 30 30
± 1800 30 30
± 2000 100 100
± 2200 100 100
± 2400 100 100
± 2600 100 100
± 2800 100 100
± 3000 100 100
± 3200 100 100
± 3400 100 100
± 3600 100 100
± 3800 100 100
± 4000 100 100
± 4200 100 100
± 4400 100 100
± 4600 100 100
± 4800 100 100
± 5000 100 100
± 5200 100 100
± 5400 100 100
± 5600 100 100
± 5800 100 100
± 6000 100 100
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The measurement can be performed using either the "External" or "Power" trigger
modes (see Chapter 3.2.6, "Trigger settings", on page 39). The trigger signal must be
received once per GSM frame.
When using a power trigger, every active burst in the frame is measured. It is therefore
important that all active bursts in the frame have the same modulation and filter type,
otherwise the measurement results are not standard conformant.
Power trigger operation is not recommended for modulation formats that have zerocrossings (i.e. all except GMSK, QPSK and 8PSK). Therefore, the power trigger should
only be used for GMSK,QPSK and 8PSK bursts. For 16QAM and 32QAM bursts an
external trigger should be used.
It is recommended that you use the "Auto Set > Trigger" functionality of the R&S FSVK10 application before starting the wide modulation list measurement. This automatically determines the appropriate "Trigger Offset" for the given frame configuration and
the signal under test (see "Trigger Offset" on page 57).
Contrary to "Modulation Spectrum", the Wide Modulation Spectrum measurement is
performed in gated zero-span mode, where the gating parameters (offset and length)
are calculated based on the user-defined "Trigger Offset" and "Frame Configuration"
settings. 50-90% of the active part of the "Slot to Measure" (excluding TSC) are measured. This approach provides improved measurement dynamics compared to the
"Modulation Spectrum" approach that is based on captured I/Q data.
Figure 3-18: Results Table in Wide Modulation Spectrum
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