R&S® FSV-K10
Firmware Option GSM Measurement
Operating Manual
(;ÚÙJ2)
1176.7526.02 ─ 04.1
Operating Manual
Test & Measurement
This manual describes the following options:
●
R&S FSV-K10 (1310.8055.02)
The contents of this manual correspond to the following R&S®FSVR models with firmware version 2.23 or
higher:
●
R&S®FSVR7 (1311.0006K7)
●
R&S®FSVR13 (1311.0006K13)
●
R&S®FSVR30 (1311.0006K30)
●
R&S®FSVR40 (1311.0006K40)
The software contained in this product makes use of several valuable open source software packages. For information, see the
"Open Source Acknowledgement" on the user documentation CD-ROM (included in delivery).
Rohde & Schwarz would like to thank the open source community for their valuable contribution to embedded computing.
© 2015 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.
The following abbreviations are used throughout this manual: R&S®FSV is abbreviated as R&S FSV. R&S®FSVR is abbreviated as
R&S FSVR.
R&S® FSV-K10
1 Preface.................................................................................................... 5
1.1 Documentation Overview............................................................................................. 5
1.2 Conventions Used in the Documentation...................................................................7
1.3 How to Use the Help System........................................................................................8
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.................................................................. 54
3.4 FREQ Key.....................................................................................................................86
Contents
Contents
3.5 AMPT Key.................................................................................................................... 86
3.6 AUTO SET Key............................................................................................................ 86
3.7 SWEEP Key..................................................................................................................86
3.8 TRACE Key.................................................................................................................. 86
3.9 TRIG Key...................................................................................................................... 87
3.10 Softkeys of the Marker Menu – MKR Key................................................................. 88
3.11 Softkeys of the Marker to Menu – MKR-> Key..........................................................88
3.12 Softkeys of the Input/Output Menu............................................................................89
4 Remote Commands (GSM)..................................................................91
4.1 Notation........................................................................................................................91
4.2 ABORt Subsystem...................................................................................................... 94
4.3 CALCulate Subsystem................................................................................................94
4.4 CONFigure Subsystem............................................................................................. 104
4.5 DISPlay Subsystem...................................................................................................151
4.6 FETCh Subsystem.................................................................................................... 155
4.7 INITiate Subsystem................................................................................................... 190
4.8 INPut Subsystem.......................................................................................................192
4.9 INSTrument Subsystem............................................................................................195
4.10 MMEMory Subsystem............................................................................................... 196
4.11 READ Subsystem......................................................................................................198
3Operating Manual 1176.7526.02 ─ 04.1
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4.12 SENSe Subsystem.................................................................................................... 238
4.13 STATus Subsystem.................................................................................................. 241
4.14 TRACe Subsystem.................................................................................................... 244
4.15 TRIGger Subsystem..................................................................................................246
4.16 Commands for Compatibility................................................................................... 250
5 Status Reporting System.................................................................. 251
5.1 STATus:OPERation Register................................................................................... 252
5.2 STATus:QUEStionable Register.............................................................................. 252
5.3 STATus:QUEStionable:SYNC Register...................................................................253
5.4 STATus:QUEStionable:POWer Register.................................................................254
Contents
List of Commands..............................................................................255
Index....................................................................................................262
4Operating Manual 1176.7526.02 ─ 04.1
R&S® FSV-K10
1 Preface
Preface
Documentation Overview
1.1 Documentation Overview
The user documentation for the R&S FSVR is divided as follows:
●
Quick Start Guide
●
Operating Manuals for base unit and options
●
Service Manual
●
Online Help
●
Release Notes
Quick Start Guide
This manual is delivered with the instrument in printed form and in PDF format on the
CD. It provides the information needed to set up and start working with the instrument.
Basic operations and basic measurements are described. Also a brief introduction to
remote control is given. The manual includes general information (e.g. Safety Instructions) and the following chapters:
Chapter 1 Introduction, General information
Chapter 2 Front and Rear Panel
Chapter 3 Preparing for Use
Chapter 4 Firmware Update and Installation of Firmware Options
Chapter 5 Basic Operations
Chapter 6 Basic Measurement Examples
Chapter 7 Brief Introduction to Remote Control
Appendix Printer Interface
Appendix LAN Interface
Operating Manuals
The Operating Manuals are a supplement to the Quick Start Guide. Operating Manuals
are provided for the base unit and each additional (software) option.
The Operating Manual for the base unit provides basic information on operating the
R&S FSVR in general, and the "Spectrum" mode in particular. Furthermore, the software options that enhance the basic functionality for various measurement modes are
described here. The set of measurement examples in the Quick Start Guide is expanded by more advanced measurement examples. In addition to the brief introduction to
remote control in the Quick Start Guide, a description of the basic analyzer commands
and programming examples is given. Information on maintenance, instrument interfaces and error messages is also provided.
5Operating Manual 1176.7526.02 ─ 04.1
R&S® FSV-K10
Preface
Documentation Overview
In the individual option manuals, the specific instrument functions of the option are
described in detail. For additional information on default settings and parameters, refer
to the data sheets. Basic information on operating the R&S FSVR is not included in the
option manuals.
The following Operating Manuals are available for the R&S FSVR:
●
R&S FSVR base unit; in addition:
– R&S FSV-K7S Stereo FM Measurements
– R&S FSV-K9 Power Sensor Support
– R&S FSV-K14 Spectrogram Measurement
●
R&S FSV-K10 GSM/EDGE Measurement
●
R&S FSV-K30 Noise Figure Measurement
●
R&S FSV-K40 Phase Noise Measurement
●
R&S FSV-K70 Vector Signal Analysis Operating Manual
R&S FSV-K70 Vector Signal Analysis Getting Started (First measurements)
●
R&S FSV-K72 3GPP FDD BTS Analysis
●
R&S FSV-K73 3GPP FDD UE Analysis
●
R&S FSV-K76/77 3GPP TD-SCDMA BTS/UE Measurement
●
R&S FSV-K82/83 CDMA2000 BTS/MS Analysis
●
R&S FSV-K84/85 1xEV-DO BTS/MS Analysis
●
R&S FSV-K91 WLAN IEEE 802.11
●
R&S FSV-K93 WiMAX IEEE 802.16 OFDM/OFDMA Analysis
●
R&S FSV-K100/K104 EUTRA / LTE Downlink Measurement Application
●
R&S FSV-K101/K105 EUTRA / LTE Uplink Measurement Application
These manuals are available in PDF format on the CD delivered with the instrument.
Service Manual
This manual is available in PDF format on the CD delivered with the instrument. It
describes how to check compliance with rated specifications, instrument function,
repair, troubleshooting and fault elimination. It contains all information required for
repairing the R&S FSVR by replacing modules. The manual includes the following
chapters:
Chapter 1 Performance Test
Chapter 2 Adjustment
Chapter 3 Repair
Chapter 4 Software Update / Installing Options
Chapter 5 Documents
Online Help
The online help contains context-specific help on operating the R&S FSVR and all
available options. It describes both manual and remote operation. The online help is
6Operating Manual 1176.7526.02 ─ 04.1
R&S® FSV-K10
Preface
Conventions Used in the Documentation
installed on the R&S FSVR by default, and is also available as an executable .chm file
on the CD delivered with the instrument.
Release Notes
The release notes describe the installation of the firmware, new and modified functions, eliminated problems, and last minute changes to the documentation. The corresponding firmware version is indicated on the title page of the release notes. The current release notes are provided in the Internet.
1.2 Conventions Used in the Documentation
1.2.1 Typographical Conventions
The following text markers are used throughout this documentation:
Convention Description
"Graphical user interface elements"
KEYS Key names are written in capital letters.
File names, 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.
File names, commands, coding samples and screen output are distinguished by their font.
tion marks.
1.2.2 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 keyboard.
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R&S® FSV-K10
Preface
How to Use the Help System
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.
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.
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Preface
How to Use the Help System
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.
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.
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R&S® FSV-K10
2 Introduction
Introduction
This document contains all information required for operation of an R&S FSVR 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 91
describes all remote control commands defined for the GSM/EDGE, EDGE Evolution (EGPRS2) and VAMOS measurements.
●
chapter 5, "Status Reporting System", on page 251
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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R&S® FSV-K10
3 Instrument Functions GSM
Instrument Functions GSM
The R&S FSVR 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 Multiuser 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 54.
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 FSVR 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................................................................ 54
● FREQ Key...............................................................................................................86
● AMPT Key...............................................................................................................86
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Instrument Functions GSM
Measurements and Result Displays
● AUTO SET Key.......................................................................................................86
● SWEEP Key............................................................................................................86
● TRACE Key.............................................................................................................86
● TRIG Key................................................................................................................ 87
● Softkeys of the Marker Menu – MKR Key...............................................................88
● Softkeys of the Marker to Menu – MKR-> Key........................................................88
● Softkeys of the Input/Output Menu..........................................................................89
3.1 Measurements and Result Displays
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.........................................................................................16
● Constellation........................................................................................................... 18
● Trigger to Sync........................................................................................................19
● Power vs Time........................................................................................................ 20
● Modulation Spectrum.............................................................................................. 23
● Transient Spectrum.................................................................................................26
● Wide Modulation Spectrum.....................................................................................27
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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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.
3.1.2 Modulation Accuracy
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.
Fig. 3-1: Modulation Accuracy
To display a "Modulation Accuracy" table, select: "Demod > Modulation Accuracy" (see
"Modulation Accuracy" on page 80) 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 76). 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.
13Operating Manual 1176.7526.02 ─ 04.1
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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 65).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" ("Statis-
tic Count" on page 60).
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)
Fig. 3-2: Phase Error vs Time graph
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Instrument Functions GSM
Measurements and Result Displays
Fig. 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 81) 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 76). 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 65).
Count" on page 60.
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Instrument Functions GSM
Measurements and Result Displays
Fig. 3-4: EVM vs Time graph
Fig. 3-5: EVM vs Time values in Modulation Accuracy list
To start a "EVM vs Time" measurement, select: "Demod > EVM" (see "EVM"
on page 81) 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 76). 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 65).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 60).
Limit Check None
3.1.5 Magnitude Error vs Time
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).
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Instrument Functions GSM
Measurements and Result Displays
Fig. 3-6: Magnitude Error vs Time graph
Fig. 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 81) 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 76). 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.
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Measure" on page 65).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 60).
Limit Check None
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Instrument Functions GSM
Measurements and Result Displays
3.1.6 Constellation
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).
Fig. 3-8: Constellation
To display a "Constellation" diagram, select: "Demod > Constell" (see "Constell"
on page 81) and then start a measurement (RUN SINGLE/RUN CONT key).
Constellation diagrams can be included in multiple measurements (see "Multi Meas
Tab" on page 76). 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.
The Multicarrier BTS option (see "Multicarrier BTS" on page 78) 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.
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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 65).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 60).
Limit Check None
3.1.7 Trigger to Sync
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 3.2.10, "Definition of the Symbol Period",
on page 48).
Fig. 3-9: Trigger to Sync
To start a "Trigger to Sync" measurement, select "Demod > More > Trigger to Sync"
(see "Trigger to Sync" on page 82 ). Then start a measurement (RUN SINGLE/RUN
CONT key).
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 59).
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Instrument Functions GSM
Measurements and Result Displays
3.1.8 Power vs Time
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 3.2.8, "Defining the Scope of the Measurement", on page 43) 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 82: Displays all bursts in the slot scope
●
"Rising" on page 82: Displays rising edges only (the rest of the burst is removed)
●
"Falling" on page 83: Displays fallling edges only (the rest of the burst is
removed)
●
"Rise & Fall" on page 83: Rising and falling edges zoomed
●
"Top" on page 83: Useful part high resolution (same as "Full" on page 82, 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 76). 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.
Fig. 3-10: Full Burst view in Power vs Time
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Instrument Functions GSM
Measurements and Result Displays
Fig. 3-11: Rising and Falling Edge view in Power vs Time
Fig. 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 88).
The table displays the following information (see figure 3-13):
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Instrument Functions GSM
Measurements and Result Displays
●
The slot powers of all slots in the slot scope (see chapter 3.2.8, "Defining the
Scope of the Measurement", on page 43. 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").
Fig. 3-13: Power vs Time list display
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 3.2.11, "Time-
slot Alignment", on page 51.
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
0 = Slot
to measure
0 156.25 312.50 468.75 625.00 781.25 937.50 1093.75
1 2 3 4 5 6 7
Equal
Timeslot
Length =
Off
0 157 313 469 625 782 938 1094
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R&S® FSV-K10
Instrument Functions GSM
Measurements and Result Displays
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 3.2.8, "Defining the Scope of the
Measurement", on page 43).
Averaging Configuration Number of frames as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 60)..
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.
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 179
FETCh:BURSt:SPOWer:SLOT<s>:ALL:CRESt? on page 180
FETCh:BURSt:SPOWer:SLOT<s>:ALL:MAXimum? on page 181
FETCh:BURSt:SPOWer:SLOT<s>:CURRent:AVERage? on page 182
FETCh:BURSt:SPOWer:SLOT<s>:CURRent:CRESt? on page 183
FETCh:BURSt:SPOWer:SLOT<s>:CURRent:MAXimum? on page 184
FETCh:BURSt:SPOWer:SLOT<s>:DELTatosync? on page 185
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
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Instrument Functions GSM
Measurements and Result Displays
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.
Fig. 3-14: Frequency Domain of modulation spectrum with traces and limits (red)
Fig. 3-15: Results Table in Modulation Spectrum
To start a "Modulation Spectrum" measurement, select: "Spectrum > Modulation Spectrum" (see "Modulation Spectrum" on page 83) and then start a measurement (RUN
SINGLE/RUN CONT key).
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Instrument Functions GSM
Measurements and Result Displays
Modulation Spectrum results can be included in multiple measurements (see "Multi
Meas Tab" on page 76). 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.
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 65).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 60)..
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.
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Instrument Functions GSM
Measurements and Result Displays
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]?.
3.1.10 Transient Spectrum
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 65), the measurement is performed over the interval defined by the "Number of slots to measure" (see "Number of Slots to measure"
on page 65) and the "First Slot to measure" (see "First Slot to measure"
on page 65) in the "Measurement Settings", i.e. one measurement per frame.
See also chapter 3.2.8, "Defining the Scope of the Measurement", on page 43.
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.
Fig. 3-16: Frequency Domain of Transient Spectrum with traces and limits (red)
26Operating Manual 1176.7526.02 ─ 04.1
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Instrument Functions GSM
Measurements and Result Displays
Fig. 3-17: Result Table in Transient Spectrum
To start a "Transient Spectrum" measurement, select: "Spectrum > Transient Spectrum" (see "Transient Spectrum" on page 83) 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 76). 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 3.2.8, "Defining the Scope of the
Measurement", on page 43).
Averaging Configuration Number of frames as selected in "Statistic Count" in "General Settings" (see
"Statistic Count" on page 60).
Limit Check According to standard.
3.1.11 Wide Modulation Spectrum
●
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
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 23), 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.
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Instrument Functions GSM
Measurements and Result Displays
To start a "Wide Modulation Spectrum" measurement, select "Wide Spectrum > Wide
Mod Spectrum" (see "Wide Mod Spectrum" on page 84).
Wide modulation spectrum measurements are not available for signals from the Digital
Baseband Interface (R&S FSV-B17).
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
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Instrument Functions GSM
Measurements and Result Displays
Offset Frequency (kHz) RBW (kHz) VBW (kHz)
± 5600 100 100
± 5800 100 100
± 6000 100 100
The measurement can be performed using either the "External" or "Power" trigger
modes (see chapter 3.2.6, "Trigger settings", on page 38). 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 60).
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.
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Instrument Functions GSM
Measurements and Result Displays
Fig. 3-18: Results Table in Wide Modulation Spectrum
The following default settings are used for a "Wide Modulation Spectrum" measurement.
Setting Default
Measurement Scope The slot selected as "Slot to measure" in "Measurement Settings" (see "Slot to
Measure" on page 65).
Averaging Configuration Number of bursts as selected in "Statistic Count" in "General Settings""Statistic
Count" on page 60.
Limit Check According to standard.
●
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)
– Number of 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
Remote commands
The "Wide Modulation Spectrum" measurement is started using the CONFigure:
WSPectrum:MODulation[:IMMediate] command.
The gating parameters of the "Wide Modulation Spectrum" measurement can be queried using READ:WSPectrum:MODulation:GATing?.
30Operating Manual 1176.7526.02 ─ 04.1
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