Rohde&Schwarz R&S®WinIQSIM2™ Digital Standardss User Manual
DAB / T-DMB
Digital Standard for
R&S®Signal Generators
Operating Manual
(;ÕÅO<)
1171.5531.12 ─ 15
Operating Manual
Test & Measurement
This document describes the following software options:
●
R&S®SMBV-K53/-K353/-K354
1415.8154.xx, 1415.8702.02, 1415.8783.02
●
R&S®SMU-K53/-K353/-K354
1400.6209.02, 1408.8652.02, 1408.8717.02
●
R&S®AMU-K53
1402.9957.02
●
R&S®SMATE-K53
1400.6409.02
●
R&S®SMJ-K53/-K353/-K354
1400.6309.02, 1409.3525.02, 1409.3583.02
This manual version corresponds to firmware version:
FW 3.50.082.xx and later of the R&S®SMBV100A
FW 3.20.286.xx and later of the R&S®SMU200A, R&S®SMATE200A, R&S®SMJ100A and R&S®AMU200A
© 2016 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®SMBV100A is abbreviated as R&S SMBV, R&S®SMU200A is
abbreviated as R&S SMU,R&S®AMU200A is abbreviated as R&S AMU, R&S®SMATE200A is abbreviated as R&S SMATE,
R&S®SMJ100A is abbreviated as R&S SMJ, R&S®WinIQSIM2TM is abbreviated as R&S WinIQSIM2; the license types
02/03/07/11/13/16/12 are abbreviated as xx.
ContentsDAB / T-DMB
Contents
1 Preface.................................................................................................... 5
1.1 Documentation Overview............................................................................................. 5
1.2 Conventions Used in the Documentation...................................................................6
1.2.1 Typographical Conventions.............................................................................................6
1.2.2 Notes on Screenshots.....................................................................................................7
1.2.3 Naming of Software Options........................................................................................... 7
2 Introduction............................................................................................ 8
2.1 DAB Network................................................................................................................. 8
2.2 DAB Transmission System.......................................................................................... 9
2.3 Transport Mechanisms.................................................................................................9
2.3.1 Transmission channels................................................................................................. 10
2.3.2 Transport Modes........................................................................................................... 11
2.4 Pseudo Noise (PN) Scrambling................................................................................. 11
2.5 Convolutional Coding.................................................................................................11
2.6 Time Interleaving.........................................................................................................12
3 DAB/T-DMB User Interface..................................................................13
3.1 General Settings for DAB/T-DMB Signals.................................................................13
3.2 System Configuration.................................................................................................17
3.3 Filter Settings.............................................................................................................. 18
3.4 Trigger/Marker/Clock Settings................................................................................... 19
3.4.1 Trigger In.......................................................................................................................20
3.4.2 Marker Mode................................................................................................................. 24
3.4.3 Marker Delay.................................................................................................................25
3.4.4 Clock Settings............................................................................................................... 25
3.4.5 Global Settings..............................................................................................................27
4 Remote-control commands.................................................................28
4.1 General Commands.................................................................................................... 29
4.2 System Configuration.................................................................................................34
4.3 Filter Settings.............................................................................................................. 34
4.4 Trigger Settings...........................................................................................................38
3Operating Manual 1171.5531.12 ─ 15
ContentsDAB / T-DMB
4.5 Marker Settings........................................................................................................... 41
4.6 Clock Settings............................................................................................................. 45
List of Commands................................................................................48
Index......................................................................................................50
4Operating Manual 1171.5531.12 ─ 15
1 Preface
PrefaceDAB / T-DMB
Documentation Overview
1.1 Documentation Overview
This section provides an overview of the R&S Signal Generator user documentation.
You find it on the product page at:
http://www.rohde-schwarz.com/product/SMBV100A.html > "Downloads"
Quick start guide
Introduces the R&S Signal Generator 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.
Online help
Offers quick, context-sensitive access to the complete information for the base unit and
the software options directly on the instrument.
Operating manual
Separate manuals for the base unit and the software options are provided for download:
●
Base unit manual
Contains the description of all instrument modes and functions. It also provides an
introduction to remote control, a complete description of the remote control commands with programming examples, and information on maintenance, instrument
interfaces and error messages. Includes the contents of the quick start guide manual.
●
Software option manual
Contains the description of the specific functions of an option. Basic information on
operating the R&S Signal Generator is not included.
The online version of the operating manual provides the complete contents for immediate display on the Internet.
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).
5Operating Manual 1171.5531.12 ─ 15
PrefaceDAB / T-DMB
Conventions Used in the Documentation
Instrument security procedures manual
Deals with security issues when working with the R&S Signal Generator in secure
areas.
Basic safety instructions
Contains safety instructions, operating conditions and further important information.
The printed document is delivered with the instrument.
Data sheet and brochure
The data sheet contains the technical specifications of the software options, see "Digital Standards for Signal Generators - Data sheet" on the web site. It also lists the
options and their order numbers.
The brochure provides an overview of the instrument and deals with the specific characteristics.
Release notes and open source acknowledgment (OSA)
The release notes of the base units 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 the product page of the base unit, e.g. at:
http://www.rohde-schwarz.com/product/SMBV100A.html > "Downloads" > "Firmware"
Application Notes, Application Cards, White Papers, etc.
These documents deal with special applications or background information on particular topics, see http://www.rohde-schwarz.com/appnotes.
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.
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.
6Operating Manual 1171.5531.12 ─ 15
PrefaceDAB / T-DMB
Conventions Used in the Documentation
Convention Description
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.
1.2.2 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 shown values may not represent
realistic test situations.
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.
1.2.3 Naming of Software Options
In this operating manual, we explicitly refer to options required for specific functions of
the digital standard.
The name of software options for signal generators vary in the name of the instrument,
but the option name is identical. Therefore we use in this manual the placeholder
R&S SMx/AMU.
Example:
Naming for an option of the vector signal generator R&S SMBV100A, e.g:
●
R&S SMx/AMU-K99, stands for R&S SMBV-K99
The particular software options available for the corresponding instruments are listed
on the back of the title page.
7Operating Manual 1171.5531.12 ─ 15
IntroductionDAB / T-DMB
DAB Network
2 Introduction
The R&S Signal Generator enables you to generate signals in accordance with the
Digital Audio Broadcasting (DAB)/Terrestrial Digital Multimedia Broadcasting (T-DMB)
standard.
To play back a signal from a waveform file created by the simulation software
R&S WinIQSIM2, the corresponding R&S WinIQSIM2 digital standard option must be
installed.
The generated signals are compliant with ETSI EN 300 401 standard. Via the userfriendly graphical interface of R&S Signal Generator, you can adjust several DAB signal parameters. You are enabled to generate a signal corresponding to one of the four
standard transport modes, Transmission Mode I, II, III or IV. You can also choose to
enable or disable channel coding, time interleaving and/or pseudo noise scrambling.
The R&S Signal Generator allows you to choose between different data sources. You
can either use some of the predefined data sources (two different pseudo noise
sequences, fixed all “0”, fixed all “1”) or you can use your own ETI (Ensemble Transport Interface) compliant source file. To create an ETI compliant source file, you can for
instance use the R&S STI Ensemble Mux DM001 or the R&S ETI Builder. However,
the ETI source file must fulfill some prerequisites.
The DAB system is designed for delivery of high-quality digital audio programs and
data services for mobile, portable and fixed reception from terrestrial or satellite transmitters in the Very High Frequency (VHF)/Ultra High Frequency (UHF) frequency
bands as well as for distribution through cable networks.
The DAB system is designed to provide spectrum and power efficient techniques in terrestrial transmitter network planning, known as the Single Frequency Network (SFN)
and the gap-filling technique. The DAB system is suitable for satellite as well as hybrid/
mixed terrestrial/satellite broadcasting, using a simple, nearly omni-directional receiving antenna. The DAB system meets the required sharing criteria with other radio communication services.
2.1 DAB Network
The figure bellow illustrates the outline of a DAB network.
Figure 2-1: DAB network
8Operating Manual 1171.5531.12 ─ 15
IntroductionDAB / T-DMB
Transport Mechanisms
The DAB network has three main parts: the service or service component provider, the
multiplex or ensemble provision and the transmission network provision.
The interfaces between these there blocks are scope of ETSI standards. The STI (Service Transport Interface) is defined to provide a standardized way of transporting DAB
service components, service information and control messages in a DAB collection
network.
The Ensemble Transport Interface (ETI) links the Multiplexer of the Ensemble Provider
with the transmitters of the Transmission Network Provider.
2.2 DAB Transmission System
The following block diagramm shows the components of the DAB transmission system.
Figure 2-2: Components of the Transmission System DAB
The DAB transmission signal is defined as the sum of two signals; the main signal s (t)
and an optional signal sTII (t) as illustrated in the figure above.
2.3 Transport Mechanisms
The DAB system is designed to carry several digital audio signals together with data
signals. Audio and data signals are considered to be service components which can be
grouped together to form services.
The DAB system transmission frame consists of three different channels:
●
Main Service Channel (MSC)
9Operating Manual 1171.5531.12 ─ 15
●
Fast Information Channel (FIC)
●
Synchronization Channel
IntroductionDAB / T-DMB
Transport Mechanisms
2.3.1 Transmission channels
The MSC is a time-interleaved data channel used to carry the audio and data service
components, together with possible supporting and additional data service components. The MSC is divided into a number of sub-channels. Each of the sub-channels is
individually convolutionally coded with equal or unequal error protection. Each subchannel may carry one or more service components.
The FIC is a non time-interleaved data channel with fixed equal error correction. FIC
carries information about the organization of the MSC sub-channels, such as information on the multiplex structure and, when necessary, its reconfiguration. Optionally FIC
may include service information, conditional access management information and data
service.
The Synchronization Channel provides a phase reference and is used internally for
demodulator functions such as transmission frame synchronization, automatic frequency control, transmitter identification, and channel state estimation.
The Synchronization channel, the Fast Information Channel and the Main Service
Channel form a transmission frame (see Figure 2-3). The MSC occupies the major part
of the transmission frame.
Figure 2-3: DAB transmission frame
Each transmission frame is divided into a sequence of OFDM symbols, each symbol
consisting of a number of carriers.
The Fast Information Block (FIB) and the Common Interleaved Frame (CIF) are introduced in order to provide transmission mode independent data transport packages
associated with the FIC and MSC respectively.
The data, carried in the MSC, is divided at source into regular 24 ms bursts corresponding to the sub-channel data capacity of each CIF. The CIF contains 55 296 bits,
divided at 864 capacity units, 64 bits each.
Fast Information Block (FIB) is a data burst of 256 bits. The sequence of FIBs is carried by the Fast Information Channel FIC. The structure of the FIB is common to all
transmission modes.
10Operating Manual 1171.5531.12 ─ 15
IntroductionDAB / T-DMB
Convolutional Coding
The synchronization channel symbols comprise the null symbol and the phase reference symbol. The null symbols are also used to allow a limited number of OFDM carriers to convey the Transmitter Identification Information (TII).
2.3.2 Transport Modes
Transmission mode is specific set of transmission parameters (e.g. number of carriers,
OFDM symbol duration). Four transmission modes (i.e. I, II, III and IV) are defined to
allow the system to be used for different network configurations and a range of operating frequencies. Depending on the transport mode, the transmission frame has different organization and length, i.e. the transmission frame is specific to the four transmission modes.
The table below gives the transmission frame duration and the number of FIBs and
CIFs which are associated with each transmission frame for the four transport modes.
Table 2-1: Transmission Mode Characteristics
Transport
Mode
I 96 ms 12 4 1536 1 KHz
II 24 ms 3 1 384 4 KHz
III 24 ms 4 1 192 8 KHz
IV 48 ms 6 2 768 2 KHz
Duration of
transmision
frame
Number of
FIBs per transmission frame
Number of
CIFs per transmission frame
Number of carriers
Carrier Spacing
2.4 Pseudo Noise (PN) Scrambling
Prior to convolution encoding, the transmitted signal can be scrambled by a modulo-2
addition with a pseudo-random binary sequence (PRBS).
The PRBS polynomial is of degree 9 and specified as P(X) =x9+x5+1.
The initialization word is applied in such a way that the first bit of the PRBS is obtained
when the outputs of all shift register stages are set to value "1".
2.5 Convolutional Coding
The process of convolution coding is applied at the output of each PN scrambler. The
channel encoding process is based on punctured convolutional coding, which allows
both equal and unequal error protection. Unequal error protection (UEP) is designed
for audio services, equal error protection (EEP) for audio and data services. The sampling frequency is respectively 48 kHz and 24 kHz.
The convolutional coder is a punctured convolution code, based on a mother convolutional code with constraint length 7 and rate 1/4.
11Operating Manual 1171.5531.12 ─ 15
IntroductionDAB / T-DMB
Time Interleaving
The generator polynomials are G1=(1,0,1,1,0,1,1), G2=(1,1,1,1,0,0,1),
G3=(1,1,0,0,1,0,1) and G4=(1,0,1,1,0,1,1).
To avoid the need for additional signaling overhead, the data in the FIC are encoded
with fixed, equal channel coding, with a constant 1/3 coding rate.
The puncturing procedures applied for the coding in the MSC is a combination of protection profile and protection level. There are number of permissible protection profiles
defined for each of the allowed bit rates. Each protection profile is associated with a
protection level. Protection level 1 is the highest level within the same profile.
Error protection
UEP four different pro-
EEP A Multiples of 8 kbit/s 1-A 1/4
2.6 Time Interleaving
Protection Profile Bit rate Protection Level Code Rate
tection profiles
B Multiples of 32 kbit/s 1-B 4/9
14 different bit rates 1, 2, 3, 4, 5 0,34..0,75
(64 different data
rates - protection
level combinations)
2-A 3/8
3-A 1/2
4-A 3/4
2-B 4/7
3-B 2/3
4-B 4/5
Time interleaving is applied prior to block generation at the output of each convolutional encode contributing to the sub-channels in the MSC. It is not applied to the FIC.
The time interleaving process covers 16 CIFs, 24 ms each. This results in an overall
processing delay of 384 ms.
12Operating Manual 1171.5531.12 ─ 15
General Settings for DAB/T-DMB Signals
3 DAB/T-DMB User Interface
► To access the DAB dialog, select "Baseband > DAB/T-DMB".
DAB/T-DMB User InterfaceDAB / T-DMB
3.1 General Settings for DAB/T-DMB Signals
The dialog is split into three main sections for configuring the standard. The upper section is where the DAB digital standard is enabled and reset. In the "Data Source" section, the data source file and the ETI file can be selected and source file relevant
parameters can be set. Further buttons open dialogs to configure the system and to set
filter, trigger and clock parameters.
State
Activates the standard and deactivates all the other digital standards and digital modulation modes in the same path.
Remote command:
[:SOURce<hw>]:BB:DAB:STATe on page 33
Set To Default
Calls the default settings. The values of the main parameters are listed in the following
table.
13Operating Manual 1171.5531.12 ─ 15
DAB/T-DMB User InterfaceDAB / T-DMB
General Settings for DAB/T-DMB Signals
Parameter Value
State Not affected by "Set to default"
Data Source PN15
Transport Mode I
Pseudo Noise Scrambler On
Coder On
Interleaver On
Filter Cosine
Sample Rate Variation 2.048 MHz
Trigger Mode Auto
Marker Mode Frame Start
Clock Internal
Remote command:
[:SOURce<hw>]:BB:DAB:PRESet on page 31
Save/Recall...
Calls the Save/Recall menu.
From the "Save/Recall" menu, the "File Select" windows for saving and recalling "DAB"
configurations and the "File Manager" is called.
DAB configurations are stored as files with the predefined file extension *.DAB. The
filename and the directory they are stored in are user-definable.
The complete settings in the "DAB" menu are saved and recalled.
"Recall DAB Setting"
Opens the "File Select" window for loading a saved DAB configuration.
The configuration of the selected (highlighted) file is loaded by pressing the "Select" button.
"Save DAB Setting"
Opens the "File Select" window for saving the current DAB signal
configuration.
The name of the file is specified in the "Filename" entry field, the
directory selected in the "save into" field. The file is saved by pressing
the "Save" button.
"File Manager"
Calls the "File Manager".
The "File Manager" is used to copy, delete, and rename files and to
create directories.
Remote command:
[:SOURce<hw>]:BB:DAB:SETTing:CATalog? on page 31
[:SOURce<hw>]:BB:DAB:SETTing:LOAD on page 32
[:SOURce<hw>]:BB:DAB:SETTing:STORe on page 32
[:SOURce<hw>]:BB:DAB:SETTing:DELete on page 32
14Operating Manual 1171.5531.12 ─ 15
DAB/T-DMB User InterfaceDAB / T-DMB
General Settings for DAB/T-DMB Signals
Data Source
Selects the data source to be used to generate the modulation signal.
"All 0, All 1"
"PN15, PN23"
"ETI File"
Remote command:
[:SOURce<hw>]:BB:DAB:DATA on page 29
Select ETI File
(Available if "Data Source" is set to "ETI File" only)
One of the following file types can be selected:
"DAB ETI (*.eti)"
"DAB Scrabbled ETI (*.xeti)"
0 or 1 data is generated internally.
PRBS data in accordance with the IUT-T with period lengths between
(29-1) and (223-1) are internally generated.
Uses data from an ETI file. The ETI file can be selected via the Select
ETI File button.
ETI (ensemble transport interface) files with extension *.eti
Note:
The ETI File must fulfill the following prerequisites:
●
ETI file compliant with ETI (NI, G.703)
●
Frame duration 24 ms (48 KHz sampling rate)
●
Constant multiplex configuration
●
Same stream configuration of all the frames
●
15 streams maximum.
A scrambled ETI file is an encrypted ETI file with an extension
*.xeti.
"DAB+ (K353) ETI (*.dabp_c)"
R&S SMU, R&S SMJ, and R&S SMBV only
The processing of DAB+ transport stream files (*.dabp_c) requires
option R&S SMx-K353.
DAB+ transport files are provided on a DVD. To access these files,
use one of the following:
●
Transfer the *.dabp_c files to the instrument, e.g. use USB flash
drive or USB HDD, connect it to the instrument and store the files
on the instrument's disc in the transfer directory.
●
Store the *.dabp_c files in a network directory, connect the
instrument to the LAN and process the files from the network
directory.
For detailed description of the available files, refer to the manual
"DAB+ Streams" included in the delivery of the option.
15Operating Manual 1171.5531.12 ─ 15
DAB/T-DMB User InterfaceDAB / T-DMB
General Settings for DAB/T-DMB Signals
"DAB (K354) ETI (*.dab_c)"
R&S SMU, R&S SMJ, and R&S SMBV only
The processing of T-DMB/DAB stream files (*.dab_c) requires
option R&S SMx-K354.
DAB+ transport files are provided on a DVD. To access these files,
use one of the options described above. For detailed description of
the available files, refer to the manual "T-DMB/DAB Streams" included in the delivery of the option.
Remote command:
[:SOURce<hw>]:BB:DAB:DATA:DSELection on page 30
Number of ETI Frames
This menu option is available only if the data source is set to ETI File. Enters the
desired sequence length in form of frames.
Remote command:
[:SOURce<hw>]:BB:DAB:EFRames on page 30
Loop Duration
This menu option is available only if the data source is set to ETI File. Displays the
sequence length.
Remote command:
[:SOURce<hw>]:BB:DAB:LDURation? on page 31
Transport Mode
Selects the transport mode. Selecting of transport mode is only enabled for data
source other than ETI files. For ETI data source files, this field is read only. The transport mode is read from the ETI file.
Remote command:
[:SOURce<hw>]:BB:DAB:DATA on page 29
[:SOURce<hw>]:BB:DAB:TMODe on page 33
System Configuration…
Calls the "System Configuration" menu for configuring the DAB system.
The menu is described in Chapter 3.2, "System Configuration", on page 17.
Remote command:
n.a.
Filter …
Calls the menu for setting baseband filtering. The current filter is displayed next to the
button.
The menu is described in Chapter 3.3, "Filter Settings", on page 18
Remote command:
n.a.
16Operating Manual 1171.5531.12 ─ 15
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