digital standard: dab / t-dmb - rohde & schwarz · the dab system is suitable for satellite as well...

DAB / T-DMBDigital Standard forR&S®Signal GeneratorsOperating Manual

Oper

ating

Man

ual

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This document describes the following software options:

● R&S®AMU-K53/-K2531402.9957.02, 1403.0682.02

● R&S®SMATE-K531400.6409.02

● R&S®SMBV-K53/-K253/-K353/-K3541415.8154.xx, 1415.8525.xx, 1415.8702.02, 1415.8783.02

● R&S®SMJ-K53/-K253/-K353/-K3541400.6309.02, 1409.3202.02, 1409.3525.02, 1409.3583.02

● R&S®SMU-K53/-K253/-K353/-K3541400.6209.02, 1408.8317.02, 1408.8652.02, 1408.8717.02

● R&S®SFU-K2532115.2414.02

© 2013 Rohde & Schwarz GmbH & Co. KGMühldorfstr. 15, 81671 München, GermanyPhone: +49 89 41 29 - 0Fax: +49 89 41 29 12 164E-mail: [email protected]: www.rohde-schwarz.comSubject 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®AMU200A is abbreviated as R&S AMU, R&S®SMATE200A isabbreviated as R&S SMATE, R&S®SMBV100A is abbreviated as R&S SMBV, R&S®SMJ100A is abbreviated as R&S SMJ,R&S®SMU200A is abbreviated as R&S SMU, R&S®WinIQSIM2TM is abbreviated as R&S WinIQSIM2

mailto:[email protected]://www.rohde-schwarz.com

ContentsDAB / T-DMB

3Operating Manual 1171.5531.12 ─ 12

Contents1 Preface.................................................................................................... 5

1.1 Documentation Overview............................................................................................. 5

1.2 Typographical Conventions.........................................................................................6

2 Introduction............................................................................................ 72.1 DAB Network................................................................................................................. 7

2.2 DAB Transmission System.......................................................................................... 8

2.3 Transport Mechanisms.................................................................................................8

2.3.1 Transmission channels................................................................................................... 9

2.3.2 Transport Modes........................................................................................................... 10

2.4 Pseudo Noise (PN) Scrambling................................................................................. 10

2.5 Convolutional Coding.................................................................................................10

2.6 Time Interleaving.........................................................................................................11

3 DAB/T-DMB User Interface..................................................................123.1 General Settings for DAB/T-DMB Signals.................................................................12

3.2 System Configuration.................................................................................................16

3.3 Filter Settings.............................................................................................................. 17

3.4 Clipping Settings.........................................................................................................19

3.5 Trigger/Marker/Clock Settings................................................................................... 20

3.5.1 Trigger In.......................................................................................................................21

3.5.2 Marker Mode................................................................................................................. 25

3.5.3 Marker Delay.................................................................................................................26

3.5.4 Clock Settings............................................................................................................... 27

3.5.5 Global Settings..............................................................................................................28

4 Remote-control commands.................................................................304.1 General Commands.................................................................................................... 31

4.2 System Configuration.................................................................................................35

4.3 Filter Settings.............................................................................................................. 37

4.4 Clipping Settings.........................................................................................................41

4.5 Trigger Settings...........................................................................................................42

4.6 Marker Settings........................................................................................................... 47

ContentsDAB / T-DMB


4.7 Clock Settings............................................................................................................. 52

List of Commands................................................................................55

Index......................................................................................................57

PrefaceDAB / T-DMB


1 Preface

1.1 Documentation Overview

The user documentation for the R&S Signal Generator consists of the following parts:

● Online Help system on the instrument,● "Quick Start Guide" printed manual,● Documentation CD-ROM with:

– Online help system (*.chm) as a standalone help,– Operating Manuals for base unit and options,– Service Manual,– Data sheet and specifications,– Links to useful sites on the R&S internet.

Online Help

The Online Help is embedded in the instrument's firmware. It offers quick, context-sen-sitive access to the complete information needed for operation and programming. Theonline help contains help on operating the R&S Signal Generator and all availableoptions.

Quick Start Guide

The Quick Start Guide is delivered with the instrument in printed form and in PDF for-mat on the Documentation CD-ROM. It provides the information needed to set up andstart working with the instrument. Basic operations and an example of setup are descri-bed. The manual includes also general information, e.g., Safety Instructions.

Operating Manuals

The Operating Manuals are a supplement to the Quick Start Guide. Operating Manualsare provided for the base unit and each additional (software) option.

These manuals are available in PDF format - in printable form - on the DocumentationCD-ROM delivered with the instrument. In the Operating Manual for the base unit, allinstrument functions are described in detail. Furthermore, it provides an introduction toremote control and a complete description of the remote control commands with pro-gramming examples. Information on maintenance, instrument interfaces and errormessages is also given.

In the individual option manuals, the specific instrument functions of the option aredescribed in detail. For additional information on default settings and parameters, referto the data sheets. Basic information on operating the R&S Signal Generator is notincluded in the option manuals.

Documentation Overview

PrefaceDAB / T-DMB


Service Manual

The Service Manual is available in PDF format - in printable form - on the Documenta-tion CD-ROM delivered with the instrument. It describes how to check compliance withrated specifications, on instrument function, repair, troubleshooting and fault elimina-tion. It contains all information required for repairing the instrument by the replacementof modules.

This manual can also be orderd in printed form (see ordering information in the datasheet).

Release Notes

The release notes describe new and modified functions, eliminated problems, and lastminute changes to the documentation. The corresponding firmware version is indicatedon the title page of the release notes. The current release notes are provided in theInternet.

Web Helps

Web helps are provided for the base unit and each additional (software) option. Thecontent of the web helps correspond to the user manuals for the latest product ver-sions.

The web help is an additional file format that offers quick online access. They are notintended to be downloaded but rather to access the required information directly formthe R&S website.

Web helps are available at the R&S website, on the R&S Signal Generator productpage at the "Downloads > Web Help" area.

1.2 Typographical Conventions

The following text markers are used throughout this documentation:

Convention Description

"Graphical user interface ele-ments"

All names of graphical user interface elements on the screen, such asdialog boxes, menus, options, buttons, and softkeys are enclosed byquotation marks.

KEYS Key names are written in capital letters.

File names, commands,program code

File names, commands, coding samples and screen output are distin-guished by their font.

Input Input to be entered by the user is displayed in italics.

Links Links that you can click are displayed in blue font.

"References" References to other parts of the documentation are enclosed by quota-tion marks.

Typographical Conventions

IntroductionDAB / T-DMB


2 IntroductionThe R&S Signal Generator enables you to easily generate signals in accordance withthe Digital Audio Broadcasting (DAB)/Terrestrial Digital Multimedia Broadcasting (T-DMB) standard.

The generated signals are compliant with ETSI EN 300 401 standard. Via the user-friendly graphical interface of R&S Signal Generator, you can adjust several DAB sig-nal parameters. You are enabled to generate a signal corresponding to one of the fourstandard transport modes, Transmission Mode I, II, III or IV. You can also choose toenable or disable channel coding, time interleaving and/or pseudo noise scrambling.

The R&S Signal Generator allows you to choose between different data sources. Youcan either use some of the predefined data sources (two different pseudo noisesequences, fixed all “0”, fixed all “1”) or you can use your own ETI (Ensemble Trans-port Interface) compliant source file. To create an ETI compliant source file, you can forinstance 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 anddata services for mobile, portable and fixed reception from terrestrial or satellite trans-mitters in the Very High Frequency (VHF)/Ultra High Frequency (UHF) frequencybands as well as for distribution through cable networks.

The DAB system is designed to provide spectrum and power efficient techniques in ter-restrial 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 receiv-ing antenna. The DAB system meets the required sharing criteria with other radio com-munication services.

2.1 DAB Network

The figure bellow illustrates the outline of a DAB network.

Fig. 2-1: DAB network

The DAB network has three main parts: the service or service component provider, themultiplex or ensemble provision and the transmission network provision.

The interfaces between these there blocks are scope of ETSI standards. The STI (Ser-vice Transport Interface) is defined to provide a standardized way of transporting DAB

DAB Network



service components, service information and control messages in a DAB collectionnetwork.

The Ensemble Transport Interface (ETI) links the Multiplexer of the Ensemble Providerwith the transmitters of the Transmission Network Provider.

2.2 DAB Transmission System

The following block diagramm shows the components of the DAB transmission system.

Fig. 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 datasignals. Audio and data signals are considered to be service components which can begrouped together to form services.

The DAB system transmission frame consists of three different channels:● Main Service Channel (MSC)● Fast Information Channel (FIC)● Synchronization Channel

DAB Transmission System



2.3.1 Transmission channels

The MSC is a time-interleaved data channel used to carry the audio and data servicecomponents, together with possible supporting and additional data service compo-nents. The MSC is divided into a number of sub-channels. Each of the sub-channels isindividually convolutionally coded with equal or unequal error protection. Each sub-channel may carry one or more service components.

The FIC is a non time-interleaved data channel with fixed equal error correction. FICcarries information about the organization of the MSC sub-channels, such as informa-tion on the multiplex structure and, when necessary, its reconfiguration. Optionally FICmay include service information, conditional access management information and dataservice.

The Synchronization Channel provides a phase reference and is used internally fordemodulator functions such as transmission frame synchronization, automatic fre-quency control, transmitter identification, and channel state estimation.

The Synchronization channel, the Fast Information Channel and the Main ServiceChannel form a transmission frame (see figure 2-3). The MSC occupies the major partof the transmission frame.

Fig. 2-3: DAB transmission frame

Each transmission frame is divided into a sequence of OFDM symbols, each symbolconsisting of a number of carriers.

The Fast Information Block (FIB) and the Common Interleaved Frame (CIF) are intro-duced in order to provide transmission mode independent data transport packagesassociated with the FIC and MSC respectively.

The data, carried in the MSC, is divided at source into regular 24 ms bursts corre-sponding 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 car-ried by the Fast Information Channel FIC. The structure of the FIB is common to alltransmission modes.

The synchronization channel symbols comprise the null symbol and the phase refer-ence symbol. The null symbols are also used to allow a limited number of OFDM carri-ers to convey the Transmitter Identification Information (TII).

Transport Mechanisms



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 toallow the system to be used for different network configurations and a range of operat-ing frequencies. Depending on the transport mode, the transmission frame has differ-ent organization and length, i.e. the transmission frame is specific to the four transmis-sion modes.

The table below gives the transmission frame duration and the number of FIBs andCIFs which are associated with each transmission frame for the four transport modes.

Table 2-1: Transmission Mode Characteristics

TransportMode

Duration oftransmisionframe

Number ofFIBs per trans-mission frame

Number ofCIFs per trans-mission frame

Number of car-riers

Carrier Spac-ing

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

2.4 Pseudo Noise (PN) Scrambling

Prior to convolution encoding, the transmitted signal can be scrambled by a modulo-2addition 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 obtainedwhen 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. Thechannel encoding process is based on punctured convolutional coding, which allowsboth equal and unequal error protection. Unequal error protection (UEP) is designedfor audio services, equal error protection (EEP) for audio and data services. The sam-pling frequency is respectively 48 kHz and 24 kHz.

The convolutional coder is a punctured convolution code, based on a mother convolu-tional code with constraint length 7 and rate 1/4.

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 encodedwith fixed, equal channel coding, with a constant 1/3 coding rate.

Pseudo Noise (PN) Scrambling



The puncturing procedures applied for the coding in the MSC is a combination of pro-tection profile and protection level. There are number of permissible protection profilesdefined for each of the allowed bit rates. Each protection profile is associated with aprotection level. Protection level 1 is the highest level within the same profile.

Error protec-tion

Protection Profile Bit rate Protection Level Code Rate

UEP four different pro-tection profiles

14 different bit rates 1, 2, 3, 4, 5 0,34..0,75

(64 different datarates - protectionlevel combinations)

EEP A Multiples of 8 kbit/s 1-A 1/4

2-A 3/8

3-A 1/2

4-A 3/4

B Multiples of 32 kbit/s 1-B 4/9

2-B 4/7

3-B 2/3

4-B 4/5

2.6 Time Interleaving

Time interleaving is applied prior to block generation at the output of each convolu-tional 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 overallprocessing delay of 384 ms.

Time Interleaving

DAB/T-DMB User InterfaceDAB / T-DMB


3 DAB/T-DMB User Interface► To access the DAB dialog, select Baseband "Block > DAB/T-DMB"

The screenshots provided in this description show parameter values that have beenselected to illustrate as much as possible of the provided functions and possible inter-dependencies between them.These values are not necessarily representative of realistic test situations.

3.1 General Settings for DAB/T-DMB Signals

The dialog is split into three main sections for configuring the standard. The upper sec-tion is where the DAB digital standard is enabled and reset. In the Data Source sec-tion, the data source file and the ETI file can be selected and source file relevantparameters can be set. Further buttons open dialogs to configure the system and to setfilter, trigger and clock parameters.

StateActivates or deactivates the DAB standard.

Activating this standard disables all the other digital standards and digital modulationmodes (in case of two-path instruments, this affects the same path).

General Settings for DAB/T-DMB Signals



The DAB signal is generated according to the performed settings.

Remote command: [:SOURce]: BB:DAB: STATe on page 35

Set To DefaultCalls the default settings. The values of the main parameters are listed in the followingtable.

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]: BB: DAB:PRESet on page 33

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. Thefile name and the directory they are stored in are user-definable.

The complete settings in the "DAB" menu are saved and recalled.

"Recall DABSetting"

Opens the "File Select" window for loading a saved DAB configura-tion.The configuration of the selected (highlighted) file is loaded by press-ing the "Select" button.

"Save DABSetting"

Opens the "File Select" window for saving the current DAB signalconfiguration.The name of the file is specified in the "File name" entry field, thedirectory selected in the "save into" field. The file is saved by pressingthe "Save" button.




"File Manager" Calls the "File Manager".The "File Manager" is used to copy, delete, and rename files and tocreate new directories.

Remote command: [:SOURce]: BB: DAB:SETTing: CATalog? on page 33[:SOURce]: BB: DAB:SETTing: LOAD on page 34[: SOURce]: BB: DAB:SETTing: STORe on page 34[: SOURce]: BB: DAB:SETTing: DELete on page 34

Data SourceSelects the data source to be used to generate the modulation signal.

"All 0, All 1" 0 or 1 data is generated internally.

"PN15, PN23" PRBS data in accordance with the IUT-T with period lengths between29-1 and 223-1 are internally generated.

"ETI File" Uses data from an ETI file. The ETI file can be selected via the SelectETI File button.

Remote command: [:SOURce]: BB: DAB:DATA on page 31

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)"

ETI (Ensemble Transport Interface) files with extension *.etiNote: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.

"DAB Scrab-bled ETI(*.xeti)"

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 onlyThe processing of DAB+ transport stream files (*.dabp_c) requiresoption 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 stick

or USB HDD, connect it to the instrument and store the files onthe instrument's disc in the transfer directory.

● Store the *.dabp_c files in a network directory, connect theinstrument to the LAN and process the files from the networkdirectory.

For detailed description of the available files, refer to the manual"DAB+ Streams" included in the delivery of the option.

"DAB (K354)ETI (*.dab_c)"

R&S SMU, R&S SMJ, and R&S SMBV onlyThe processing of T-DMB/DAB stream files (*.dab_c) requiresoption 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 ofthe available files, refer to the manual "T-DMB/DAB Streams" inclu-ded in the delivery of the option.

Remote command: [:SOURce]: BB: DAB:DATA: DSELection on page 32

Number of ETI FramesThis menu option is available only if the data source is set to ETI File. Enters thedesired sequence lenght in form of frames.

Remote command: [:SOURce]: BB: DAB:EFRames on page 32

Loop DurationThis menu option is available only if the data source is set to ETI File. Displays thesequence length.

Remote command: [:SOURce]: BB: DAB:LDURation? on page 33

Transport ModeSelects the transport mode. Selecting of transport mode is only enabled for datasource other then ETI files. For ETI data source files this field is read only. The trans-port mode is read from the ETI file.

Remote command: [: SOURce]: BB:DAB:DATA on page 31[: SOURce]: BB:DAB:TMODe on page 35

System Configuration…Calls the "System Configuration" menu for configuring the DAB system.




The menu is described in chapter 3.2, "System Configuration", on page 16.

Remote command: n.a.

Filter …Calls the menu for setting baseband filtering. The current filter is displayed next to thebutton.

The menu is described in chapter 3.3, "Filter Settings", on page 17


Trigger/Marker/Clock(Trigger and clock settings for R&S SMx and R&S AMU instruments only)Calls the menu for selecting the trigger mode and trigger source, for configuring themarker signals, for setting the time delay of an external trigger signal and for selectingthe clock source. This menu is described in chapter 3.5, "Trigger/Marker/Clock Set-tings", on page 20.

The currently selected trigger mode and trigger source are displayed next to the but-ton.


Execute Trigger(R&S SMx and R&S AMU instruments only)Executes the trigger manually. A manual trigger can be executed only if an internal trig-ger source and a trigger mode other than "Auto" have been selected.

Remote command: [:SOURce]: BB:DAB: TRIGger: EXECute on page 42

Arm(R&S SMx and R&S AMU instruments only)Stops signal generation manually. This button appears only with "Running" signal gen-eration in the "Armed_Auto" and "Armed_Retrigger" trigger modes.

Signal generation can be restarted by a new trigger (internally with "Execute Trigger"or externally).

Remote command: [: SOURce]: BB:DAB:TRIGger: ARM: EXECute on page 42

3.2 System Configuration

The "System Configuration" menu allows configuration of the DAB system.

System Configuration



PN ScramblerActivates/deactivates the PN scrambling. The data packets of the incoming transportstream are transformed to a Pseudo Random Binary Sequence (PRBS) in order toobtain a bit sequence that has a positive effect on the transmitted RF spectrum. Thisfeature is enabled for ETI data source files only.

Remote command: [: SOURce]: BB:DAB:PNSCrambler[: STATe] on page 36

CoderActivates/deactivates the coder. The coder applies a Reed-Solomon error correctioncode to the PRBS data stream. This feature is enabled for ETI data source files only. Ifthe convolutional encoder is switched off, the number of bits delivered from the coderin enabled state is now fetched from the scrambler and therefore from data source. Soplease keep in mind that the data framing is not valid anymore.

Remote command: [:SOURce]: BB:DAB:CODer[: STATe] on page 36

InterleaverActivates/deactivates the convolutional interleaver.

This feature is enabled for ETI data source files only.

After turning on the standard, the MSC values are not valid during the first 16 CIFs,because of the time interleaver’s depth.

Remote command: [:SOURce]: BB:DAB: ILEaver[: STATe] on page 36

3.3 Filter Settings

► To access this dialog, select "Main Menu > Filter".

The dialog comprises the settings, necessary to configure the baseband filter.

Filter Settings



FilterSelects the baseband filter.

Remote command: [:SOURce]: BB: DAB:FILTer: TYPE on page 38

Roll Off Factor or BxTSets the filter parameter.

The filter parameter offered ("Roll Off Factor" or "BxT") depends on the currentlyselected filter type. This parameter is preset to the default for each of the predefinedfilters.

Remote command: [:SOURce]: BB:DAB: FILTer:PARameter: APCO25 on page 38[: SOURce]: BB:DAB: FILTer:PARameter: COSine on page 39[: SOURce]: BB:DAB: FILTer:PARameter: RCOSine on page 40[:SOURce]: BB:DAB: FILTer:PARameter: PGAuss on page 40[: SOURce]: BB:DAB: FILTer:PARameter: GAUSs on page 39[: SOURce]: BB:DAB: FILTer:PARameter: SPHase on page 40

Cut Off Frequency Shift(available for filter parameter Cosine only)

Sets the value for the cut off frequency shift. The cut off frequency of the cosine filtercan be adjusted to reach spectrum mask requirements.

Remote command: [:SOURce]: BB:DAB: FILTer:PARameter: COSine: COFS on page 39

Cut Off Frequency FactorSets the value for the cut off frequency factor. The cut off frequency of the filter can beadjusted to reach spectrum mask requirements.

Remote command: [:SOURce]: BB: DAB:FILTer: PARameter: LPASs on page 39[:SOURce]: BB: DAB:FILTer: PARameter: LPASSEVM on page 40

Impulse Length(For WinIQSIM2 only)

Displays the number of filter tabs. If the check box is activated, the most sensibleparameter values are selected. The value depends on the coherence check. If thecheck box is deactivated, the values can be changed manually.

Remote command: [:SOURce]: BB:DAB: FILTer:ILENgth: AUTO[: STATe] on page 37[:SOURce]: BB:DAB: FILTer:ILENgth on page 37

Oversampling(For WinIQSIM2 only)

Filter Settings



Determines the upsampling factor. If the check box is activated, the most sensibleparameter values are selected. The value depends on the coherence check. If thecheck box is deactivated, the values can be changed manually.

Remote command: [:SOURce]: BB:DAB: FILTer:OSAMplinng: AUTO[:STATe] on page 38[:SOURce]: BB:DAB: FILTer:OSAMpling on page 37

3.4 Clipping Settings

Clipping Settings are available for R&S WinIQSIM2 only.

To access this dialog, select "Main Menu > Filter/Clipping".

Clipping StateSwitches baseband clipping on and off.

Baseband clipping is a very simple and effective way of reducing the crest factor of thesignal.

With baseband clipping, the signal level is limited to a settable value ("Clipping Level").This level is specified as a percentage of the highest peak value. Since clipping is doneprior to filtering, the procedure does not influence the spectrum. The EVM howeverincreases.

Remote command: [:SOURce]: BB:DAB: CLIPping: STATe on page 42

Clipping LevelSets the limit for clipping.

This value indicates at what point the signal is clipped. It is specified as a percentage,relative to the highest level. 100% indicates that clipping does not take place.

Remote command: [:SOURce]: BB: DAB:CLIPping: LEVel on page 41

Clipping ModeSelects the clipping method. A graphic illustration of the way in which these two meth-ods work is given in the menu.

Clipping Settings



"Vector | i + q|"

The limit is related to the amplitude | i + q |. The I and Q componentsare mapped together, the angle is retained.

"Scalar | i | + |q |"

The limit is related to the absolute maximum of all the I and Q values |i | + | q | .

The I and Q components are mapped separately, the angle changes.

Remote command: [:SOURce]: BB: DAB:CLIPping: MODE on page 41

3.5 Trigger/Marker/Clock Settings

The trigger, clock, and marker delay functions are available for R&S SMx and R&SAMU instruments only.

To access this dialog, select "Main Menu > Trigger/Marker".

The "Trigger In" section is where the trigger for the signal is set. Various parameterswill be provided for the settings, depending on which trigger source - internal or exter-nal - is selected. The current status of signal generation ("Running" or "Stopped") isindicated for all trigger modes.

The "Marker Mode" section is where the marker signals at the MARKER output con-nectors are configured.

The "Marker" tab is where the marker signals at the MARKER output connectors areconfigured.

Trigger/Marker/Clock Settings



The "Marker Delay" section is where a marker signal delay can be defined, either with-out restriction or restricted to the dynamic section, i.e., the section in which it is possi-ble to make settings without restarting signal and marker generation.

The "Clock Settings" section is where the clock source is selected and - in the case ofan external source - the clock type.

The buttons in the last section lead to submenu for general trigger, clock and mappingsettings.

3.5.1 Trigger In

The trigger functions are available for R&S SMx and R&S AMU instruments only.

The "Trigger In" section is where the trigger for the signal is set. Various parameterswill be provided for the settings, depending on which trigger source - internal or exter-nal - is selected. The current status of signal generation ("Running" or "Stopped") isindicated for all trigger modes.

Trigger ModeSelects trigger mode, i.e. determines the effect of a trigger event on the signal genera-tion.

● "Auto"The signal is generated continuously.

● "Retrigger"




The signal is generated continuously. A trigger event (internal or external) causes arestart.

● "Armed_Auto"The signal is generated only when a trigger event occurs. Then the signal is gener-ated continuously.An "Arm" stops the signal generation. A subsequent trigger event (internal with orexternal) causes a restart.

● "Armed_Retrigger"The signal is generated only when a trigger event occurs. Then the signal is gener-ated continuously. Every subsequent trigger event causes a restart.An "Arm" stops signal generation. A subsequent trigger event (internal with orexternal) causes a restart.

● "Single"The signal is generated only when a trigger event occurs. Then the signal is gener-ated once to the length specified at "Signal Duration".Every subsequent trigger event (internal or external) causes a restart.

Remote command: [:SOURce]: BB:DAB[: TRIGger]: SEQuence on page 46

Signal DurationDefines the length of the signal sequence to be output in the "Single" trigger mode.

It is possible to output deliberately just part of the signal, an exact sequence of the sig-nal, or a defined number of repetitions of the signal.

Remote command: [:SOURce]: BB:DAB: TRIGger:SLENgth on page 45

Running/StoppedFor enabled modulation, displays the status of signal generation for all trigger modes.

● "Running"The signal is generated; a trigger was (internally or externally) initiated in triggeredmode.

● "Stopped"The signal is not generated and the instrument waits for a trigger event.

Remote command: [:SOURce]: BB: DAB:TRIGger: RMODe? on page 44

Arm(R&S SMx and R&S AMU instruments only)Stops signal generation manually. This button appears only with "Running" signal gen-eration in the "Armed_Auto" and "Armed_Retrigger" trigger modes.

Signal generation can be restarted by a new trigger (internally with "Execute Trigger"or externally).

Remote command: [:SOURce]: BB:DAB: TRIGger:ARM: EXECute on page 42

Execute Trigger(R&S SMx and R&S AMU instruments only)




Executes the trigger manually. A manual trigger can be executed only if an internal trig-ger source and a trigger mode other than "Auto" have been selected.

Remote command: [:SOURce]: BB:DAB: TRIGger: EXECute on page 42

Trigger SourceSelects trigger source. This setting is effective when a trigger mode other than "Auto"has been selected.

● "Internal"The trigger event is executed by "Execute Trigger".

● "Internal (Baseband A/B)"(two-path instruments)The trigger event is the trigger signal from the second path

● "External (Trigger 1/2)"The trigger event is the active edge of an external trigger signal, supplied at theTRIGGER 1/2 connector.Use the "Global Trigger/Clock Settings" dialog to define the polarity, the triggerthreshold and the input impedance of the trigger signal.

Remote command: [:SOURce]: BB: DAB:TRIGger: SOURce on page 45

Sync. Output to External Trigger(enabled for Trigger Source External)

Enables/disables output of the signal synchronous to the external trigger event.

For R&S SMBV instruments:

For or two or more R&S SMBVs configured to work in a master-slave mode for syn-chronous signal generation, configure this parameter depending on the provided sys-tem trigger event and the properties of the output signal. See the table below for anoverview of the required settings.Table 3-1: Typical Applications

System Trigger Application "Sync. Output to External Trig-ger"

Common External Trigger eventfor the master and the slaveinstruments

All instruments are synchronousto the external trigger event

ON

All instruments are synchronousamong themselves but startingthe signal from first symbol ismore important than synchronicitywith external trigger event

OFF

Internal trigger signal of the mas-ter R&S SMBV for the slaveinstruments

All instruments are synchronousamong themselves

OFF




"On" Corresponds to the default state of this parameter.The signal calculation starts simultaneously with the external triggerevent but because of the instrument’s processing time the first sam-ples are cut off and no signal is outputted. After elapsing of the inter-nal processing time, the output signal is synchronous to the triggerevent.

"Off" The signal output begins after elapsing of the processing time andstarts with sample 0, i.e. the complete signal is outputted.This mode is recommended for triggering of short signal sequenceswith signal duration comparable with the processing time of theinstrument.

Remote command: [:SOURce]: BB: DAB:TRIGger: EXTernal: SYNChronize: OUTPuton page 43

Trigger DelayEnters the length of the signal sequence to be output in the "Single" trigger mode.

Use this parameter to deliberately output part of the signal, an exact sequence of thesignal, or a defined number of repetitions of the signal.

Remote command: [:SOURce]: BB: DAB:TRIGger[: EXTernal]: DELay on page 45[: SOURce]: BB: DAB:TRIGger: OBASeband: DELay on page 43




Trigger InhibitSets the duration for inhibiting a new trigger event subsequent to triggering. The inputis to be expressed in samples.

In the "Retrigger" mode, every trigger signal causes signal generation to restart. Thisrestart is inhibited for the specified number of samples.

This parameter is only available on external triggering or on internal triggering via thesecond path.

For two-path instruments, the trigger inhibit can be set separately for each of the twopaths.

Remote command: [:SOURce]: BB: DAB:TRIGger[: EXTernal]: INHibit on page 46[: SOURce]: BB: DAB:TRIGger: OBASeband: INHibit on page 44

3.5.2 Marker Mode

The marker output signal for synchronizing external instruments is configured in themarker settings section "Marker Mode".

The R&S SMBV supports only two markers.

Marker ModeSelects a marker signal for the associated "MARKER" output.

"Restart" A marker signal is generated at the start of each ARB sequence.

"Frame Start" A marker signal is generated at the start of each frame.

"Pulse" A regular marker signal is generated. The pulse frequency is definedby entering a divider. The frequency is derived by dividing the samplerate by the divider. The input box for the divider opens when "Pulse"is selected, and the resulting pulse frequency is displayed below it.

Remote command: [:SOURce]: BB: DAB:TRIGger: OUTPut: PULSe:DIVider on page 51[:SOURce]: BB: DAB:TRIGger: OUTPut: PULSe:FREQuency? on page 51

"Pattern" A marker signal that is defined by a bit pattern is generated. The pat-tern has a maximum length of 32 bits and is defined in an input fieldwhich opens when pattern is selected.

Remote command: [:SOURce]: BB: DAB:TRIGger: OUTPut: PATTern on page 50




"ON/OFFRatio"

A regular marker signal that is defined by an ON/OFF ratio is gener-ated. A period lasts one ON and OFF cycle.

The "ON Time" and "OFF Time" are each expressed as a number ofsamples and are set in an input field which opens when "ON/OFFRatio" is selected.

Remote command: [:SOURce]: BB: DAB:TRIGger: OUTPut: ONTime on page 50[:SOURce]: BB: DAB:TRIGger: OUTPut: OFFTime on page 50Remote command: [:SOURce]: BB: DAB:TRIGger: OUTPut: MODE on page 49

3.5.3 Marker Delay

The delay of the signals on the MARKER outputs is set in the"Marker Delay" section.

The marker delay functions are available for R&S SMx and R&S AMU instrumentsonly.

The R&S SMBV supports only two markers.

Marker x DelayEnters the delay between the marker signal at the marker outputs and the start of theframe or slot.

The input is expressed as a number of symbols/samples. If the setting "Fix markerdelay to dynamic range" is enabled, the setting range is restricted to the dynamicrange. In this range the delay of the marker signals can be set without restarting themarker and signal.

Remote command: [: SOURce]: BB:DAB:TRIGger: OUTPut: DELay on page 48

Current Range without RecalculationDisplays the dynamic range within which the delay of the marker signals can be setwithout restarting the marker and signal.

The delay can be defined by moving the setting mark.

Remote command: [:SOURce]: BB:DAB:TRIGger: OUTPut: DELay: MINimum? on page 49[:SOURce]: BB:DAB:TRIGger: OUTPut: DELay: MAXimum? on page 48




Fix marker delay to current rangeRestricts the marker delay setting range to the dynamic range. In this range the delaycan be set without restarting the marker and signal.

Remote command: [: SOURce]: BB:DAB:TRIGger: OUTPut: DELay:FIXed on page 48

3.5.4 Clock Settings

The Clock Settings are used to set the clock source and a delay if required.

The clock functions are available for R&S SMx and R&S AMU instruments only.

Sync. Mode(for R&S SMBV only)

Selects the synchronization mode.

This parameter is used to enable generation of very precise synchronous signal of sev-eral connected R&S SMBVs.

Note: If several instruments are connected, the connecting cables from the masterinstrument to the slave one and between each two consecutive slave instruments musthave the same length and type.Avoid unnecessary cable length and branching points.

"None" The instrument is working in stand-alone mode.

"Sync. Master" The instrument provides all connected instrument with its synchroni-sation (including the trigger signal) and reference clock signal.

"Sync. Slave" The instrument receives the synchronisation and reference clock sig-nal from another instrument working in a master mode.

Remote command: [:SOURce]: BB: DAB:CLOCk: SYNChronization: MODE on page 53

Set Synchronization Settings(for R&S SMBV only)

Performs automatically adjustment of the instrument's settings required for the syn-chronization mode, selected with the parameter "Synchronization Mode".

Remote command: [:SOURce]: BB: DAB:CLOCk: SYNChronization: EXECute on page 53

Clock SourceSelects the clock source.

"Internal" The internal clock reference is used to generate the symbol clock.




"External" The external clock reference is fed in as the symbol clock or multiplethereof via the CLOCK connector.The symbol rate must be correctly set to an accuracy of +/-2 % (seedata sheet).The polarity of the clock input can be changed with the aid of "GlobalTrigger/Clock Settings".In the case of two-path instruments this selection applies to path A.

Remote command: [:SOURce]: BB: DAB:CLOCk: SOURce on page 53

Clock ModeEnters the type of externally supplied clock.

"Sample" A sample clock is supplied via the CLOCK connector.

"Multiple Sam-ple"

A multiple of the sample clock is supplied via the CLOCK connector;the sample clock is derived internally from this.

Remote command: [:SOURce]: BB: DAB:CLOCk: MODE on page 52

Clock MultiplierEnters the multiplication factor for clock type "Multiple".

Remote command: [:SOURce]: BB:DAB: CLOCk:MULTiplier on page 52

Measured External ClockProvided for permanent monitoring of the enabled and externally supplied clock signal.

Remote command: CLOCk:INPut:FREQuency?

3.5.5 Global Settings

The buttons in this section lead to dialogs for general trigger, clock and mapping set-tings.

These settings are available for R&S SMx and R&S AMU instruments only.

Global Trigger/Clock SettingsCalls the "Global Trigger/Clock/Input Settings" dialog.

This dialog is used among other things for setting the trigger threshold, the input impe-dance and the polarity of the clock and trigger inputs.

In the case of two-path instruments, these settings are valid for both paths.

The parameters in this dialog affect all digital modulations and standards, and aredescribed in chapter "Global Trigger/Clock/Input Settings" in the Operating Manual.

User Marker / AUX I/O SettingsCalls the "User Marker AUX I/O Settings" dialog, used to map the connector on therear of the instruments.




See also "User Marker / AUX I/O Settings" in the Operating Manual.


Remote-control commandsDAB / T-DMB


4 Remote-control commandsThe following commands are required to perform signal generation with the DAB/T-DMB options in a remote environment. We assume that the R&S Signal Generator hasalready been set up for remote operation in a network as described in the R&S SignalGenerator documentation. A knowledge about the remote control operation and theSCPI command syntax are assumed.

Common Suffixes

The following common suffixes are used in remote commands:

Suffix Value range Description

SOURce [1]|2 available baseband signals

OUTPut 1 .. 4 available markersR&S SMBV supports two markers

EXTernal 1|2 external trigger connectors

Placeholder

For commands that read out or save files in the default directory, the default directoryis set using command MMEM:CDIRectory. The examples in this description use theplace holder in the syntax of the command.● D:\ - for selecting the internal hard disk of a Windows instrument● E:\ - for selecting the memory stick which is inserted at the USB interface of a

Windows instrument● /var/user/ - for selecting the internal flash card of a Linux instrument● /usb/ - for selecting the memory stick which is inserted at the USB interface of a

Linux instrument.

Tasks (in manual or remote operation) that are also performed in the base unit in thesame way are not described here.In particular, this includes:● Managing settings and data lists, i.e. storing and loading settings, creating and

accessing data lists, accessing files in a particular directory, etc.● Information on regular trigger, marker and clock signals as well as filter settings, if

appropriate.● General instrument configuration, such as configuring networks and remote opera-

tion● Using the common status registers

For a description of such tasks, see the R&S Signal Generator operating manual.

The following commands specific to the DAB/T-DMB are described here:



4.1 General Commands

This subsystem contains commands for the primary and general settings of the DABstandard. These settings concern activation and deactivation of the standard, filter,clock, and trigger settings.

The commands for setting the system configuration and the TPS parameter bits aredescribed in chapter 4.2, "System Configuration", on page 35.

[:SOURce]:BB:DAB:DATA.........................................................................................31[:SOURce]:BB:DAB:DATA:DSELection.......................................................................32[:SOURce]:BB:DAB:EFRames...................................................................................32[:SOURce]:BB:DAB:ETI:CATalog?.............................................................................32[:SOURce]:BB:DAB:LDURation?................................................................................33[:SOURce]:BB:DAB:PRESet......................................................................................33[:SOURce]:BB:DAB:SETTing:CATalog?..................................................................... 33[:SOURce]:BB:DAB:SETTing:DELete.........................................................................34[:SOURce]:BB:DAB:SETTing:LOAD...........................................................................34[:SOURce]:BB:DAB:SETTing:STORe.........................................................................34[:SOURce]:BB:DAB:SETTing:STORe:FAST................................................................34[:SOURce]:BB:DAB:STATe....................................................................................... 35[:SOURce]:BB:DAB:TMODe......................................................................................35

[:SOURce]:BB:DAB:DATA

Sets the data source. To set the data source to ETI file, the existing of *.eti file isrequired, otherwise an error is returned. An ETI File is select using the commandBB:DATA:DSELection.Parameters: ALL0 | ALL1 | PN15 | PN23 | ETI

ALL0, ALL10 or 1 data is generated internally.PN15, PN23PRBS data in accordance with the IUT-T with period lengthsbetween 29-1 and 223-1 are internally generated.ETI FileUses data from an ETI file. The ETI file can be selected via theSelect ETI File button.*RST: PN15

Example: BB:DAB:DATA PN15selects PN15 as data source.BB:DAB:DATA:DSELection 'test.eti'selects the file 'test.eti' as data source.BB:DAB:DATA ETIsets the data source to ETI file.

General Commands



[:SOURce]:BB:DAB:DATA:DSELection

Selects the file for the data source selection. For a detailed description on the availabletypes, refer to "Select ETI File" on page 14.

Parameters: string

Example: MMEM:CDIR 'DAB'selects the directory for the ETI files.BB:DAB:DATA:DSEL 'test.eti'selects the file test.eti as the data source. This file must bein the directory DAB and have the file extension *.eti.BB:DAB:DATA ETIselects the ETI files as the data source.

[:SOURce]:BB:DAB:EFRames

Sets the desired sequence lenght in form of ETI frames. This command is enabled onlyif the data source is set to ETI File.

The allowed minimum value of this parameter deppends on the transport mode of theETI file. For istanse, for transport mode I with 96 ms transmission frame duration, mini-mum 4 frames must be selected.

Parameters: float

Range: 1 to 10000Increment: 1

Example: BB:DAB:DATA:DSEL 'test.eti'selects the file 'test.eti' as the data source. This file must bein the directory D:DAB and have the file extension *.eti.BB:DAB:DATA ETIselects the ETI files as the data source.BB:DAB:EFR 50sets the number of the transmitted ETI-frames to 50.

[:SOURce]:BB:DAB:ETI:CATalog?

Reads out the files with ETI File settings in the default directory. The default directoryis set using command MMEM:CDIRectory. Only files with the file extension *.eti willbe listed.

Return values: string

General Commands



Example: MMEM:CDIR 'DAB'sets the default directory to DAB.BB:DAB:ETI:CAT?reads out all the files with ETI file settings in the default direc-tory.Response: 'test.eti','dab.eti'the files test.eti and dab.eti are available.

Usage: Query only

[:SOURce]:BB:DAB:LDURation?

Queries the sequence length of ETI file (loop duration).

Return values: float

Example: BB:DAB:LDUR?queries the loop duration.

Usage: Query only

[:SOURce]:BB:DAB:PRESet

Produces a standardized default for the DAB standard. The settings correspond to the*RST values specified for the commands.

Example: BB:DAB:PRESresets all the DAB settings to default values.

Usage: Event

[:SOURce]:BB:DAB:SETTing:CATalog?

Reads out the files with DAB settings in the default directory. The default directory isset using command MMEM:CDIRectory. A path can also be specified, in which casethe files in the specified directory are read. Only files with the file extension *.DAB willbe listed.

Return values: string

Example: MMEM:CDIR 'DAB'sets the default directory to DAB.BB:DAB:SETT:CAT?reads out all the files with DAB settings in the default directory.Response: 'DAB_1','DAB_2'the files DAB_1 and DAB_2 are available.

Usage: Query only

General Commands



[:SOURce]:BB:DAB:SETTing:DELete

This command deletes the selected file with DAB settings. The directory is set usingcommand MMEM:CDIRectory. A path can also be specified, in which case the files inthe specified directory are read. The file extension may be omitted. Only files with thefile extension *.DAB will be deleted.Setting parameters: string

Example: BB:DAB:SETT:DEL DABdeletes the specified file with DAB settings.

Usage: Setting only

[:SOURce]:BB:DAB:SETTing:LOAD

This command loads the selected file with DAB settings. The directory is set usingcommand MMEM:CDIRectory. A path can also be specified, in which case the files inthe specified directory are read. The file extension may be omitted. Only files with thefile extension *.DAB will be loaded.Setting parameters: string

Example: BB:DAB:SETT:LOAD 'DAB_1'loads file 'DAB_1'.

Usage: Setting only

[:SOURce]:BB:DAB:SETTing:STORe

This command stores the current DAB settings into the selected file. The directory isset using command MMEM:CDIRectory. A path can also be specified, in which casethe files in the specified directory are read. Only the file name has to be entered. DABsettings are stored as files with the specific file extensions *.DAB.Setting parameters: string

Example: BB:DAB:SETT:STOR 'test.DAB'stores the current DAB settings into file 'test'.

Usage: Setting only

[:SOURce]:BB:DAB:SETTing:STORe:FAST

Determines whether the instrument performs an absolute or a differential storing of thesettings.

Enable this function to accelerate the saving process by saving only the settings withvalues different to the default ones.

Note: This function is not affected by the "Preset" function.

General Commands



Parameters: 0 | 1 | OFF | ON

*RST: 1

[:SOURce]:BB:DAB:STATe

Activates modulation in accordance with the DAB standard. Activating this standarddeactivates all the other digital standards and digital modulation modes (in case of two-path instruments, this affects the same path).


*RST: 0

Example: BB:DAB:STAT ONactivates modulation in accordance with the DAB standard.

[:SOURce]:BB:DAB:TMODe

Selects the transport mode. Depending on the transport mode selected, signal with dif-ferent sequence length will be generated.

Transport mode selection is not enabled for ETI data source files; transport mode is aread only field for these files. The transport mode is read from the ETI file.

Parameters: I | II | III | IV

Itransport mode I, i.e. sequence length 96 ms.IItransport mode II, i.e. sequence length 24 ms.IIItransport mode III, i.e. sequence length 24 ms.IVtransport mode IV, i.e. sequence length 48 ms.*RST: I

Example: BB:DAB:DATA PN15selects PN15 as data source.BB:DAB:TMOD IIsets the transport mode to Tx Mode II, i.e. sequence length24ms.

4.2 System Configuration

This subsystem contains commands regarding the system configuration of the DABstandard.




[:SOURce]:BB:DAB:CODer[:STATe].......................................................................... 36[:SOURce]:BB:DAB:ILEaver[:STATe]......................................................................... 36[:SOURce]:BB:DAB:PNSCrambler[:STATe]................................................................ 36

[:SOURce]:BB:DAB:CODer[:STATe]

Activates/deactivates the coder.. This feature is enabled for ETI data source files only.


*RST: 1

Example: BB:DAB:CODer:STATe OFFdeactivates the coder. The number of bits is now fetched fromthe scrambler and therefore from data source. So please keep inmind that the data framing is not valid anymore.

[:SOURce]:BB:DAB:ILEaver[:STATe]

Activates/deactivates the interleaver. This feature is enabled for ETI data source filesonly.


*RST: ON

Example: BB:DAB:ILE:STAT ONactivates the outer interleaver. After turning on the standard, theMSC values are not valid during the first 16 CIFs, because of thetime interleaver’s depth.

[:SOURce]:BB:DAB:PNSCrambler[:STATe]

Activates/deactivates the PN scrambler. This feature is enabled for ETI data sourcefiles only.


*RST: ON

Example: BB:DAB:PNSC:STAT ONactivates the PN scrambling, that is, transforming the data pack-ets of the incoming transport stream to a Pseudo RandomBinary Sequence (PRBS).




4.3 Filter Settings

[:SOURce]:BB:DAB:FILTer:ILENgth........................................................................... 37[:SOURce]:BB:DAB:FILTer:ILENgth:AUTO[:STATe].................................................... 37[:SOURce]:BB:DAB:FILTer:OSAMpling...................................................................... 37[:SOURce]:BB:DAB:FILTer:OSAMplinng:AUTO[:STATe]..............................................38[:SOURce]:BB:DAB:FILTer:TYPE.............................................................................. 38[:SOURce]:BB:DAB:FILTer:PARameter:APCO25........................................................ 38[:SOURce]:BB:DAB:FILTer:PARameter:COSine..........................................................39[:SOURce]:BB:DAB:FILTer:PARameter:COSine:COFS................................................39[:SOURce]:BB:DAB:FILTer:PARameter:GAUSs.......................................................... 39[:SOURce]:BB:DAB:FILTer:PARameter:LPASs........................................................... 39[:SOURce]:BB:DAB:FILTer:PARameter:LPASSEVM....................................................40[:SOURce]:BB:DAB:FILTer:PARameter:PGAuss......................................................... 40[:SOURce]:BB:DAB:FILTer:PARameter:RCOSine....................................................... 40[:SOURce]:BB:DAB:FILTer:PARameter:SPHase......................................................... 40[:SOURce]:BB:DAB:SRATe:VARiation....................................................................... 41

[:SOURce]:BB:DAB:FILTer:ILENgth

for R&S WinIQSIM2 only

Sets the impulse length (number of filter tabs).

Parameters: float

Range: 1 to 128*RST: 10

Example: BB:DAB:FILT:ILEN 10sets the number of filter tabs to 10.

[:SOURce]:BB:DAB:FILTer:ILENgth:AUTO[:STATe]

(For WinIQSIM2 only)

Activates/ deactivates the impulse length state. If activated, the most sensible parame-ter values are selected. The value depends on the coherence check.


*RST: 1

Example: BB:DAB:FILT:ILEN:AUTO:STAT ON

[:SOURce]:BB:DAB:FILTer:OSAMpling

for WinIQSIM2 only

Sets the upsampling factor.

Filter Settings



Parameters: float


Example: BB:DAB:FILT:OSAM 32sets the upsampling factor to 32.

[:SOURce]:BB:DAB:FILTer:OSAMplinng:AUTO[:STATe]

for WinIQSIM2 only

Activates/ deactivates the upsampling factor state. If activated, the most sensibleparameter values are selected. The value depends on the coherence check. If deacti-vated, the values can be changed manually.


*RST: 1

Example: BB:DAB:FILT:OSAM:AUTO:STAT OFF

[:SOURce]:BB:DAB:FILTer:TYPE

Selects the filter type.

Parameters: RCOSine | COSine | GAUSs | LGAuss | CONE | COF705 |

COEQualizer | COFequalizer | C2K3x | APCO25 | SPHase |RECTangle | PGAuss | LPASs | DIRac | ENPShape |EWPShape | LPASSEVM*RST: GAUSs (if layer mode OFDM), COSine (if layer

mode CCK or PBCC)

Example: BB:DAB:FILT:TYPE RCOSsets the filter type RCOSine.

[:SOURce]:BB:DAB:FILTer:PARameter:APCO25

Sets the roll-off factor for filter type APCO25.

Parameters: float

Range: 0.05 to 0.99*RST: 0.2

Example: BB:DAB:FILT:PAR:APCO25 0.2sets the roll-off factor to 0.2 for filter type APCO25.

Filter Settings



[:SOURce]:BB:DAB:FILTer:PARameter:COSine

Sets the roll-off factor for the Cosine filter type.

Parameters: float

Range: 0.05 to 1.0Increment: 0.01*RST: 0.1

Example: BB:DAB:FILT:PAR:COS 0.35sets the roll-off factor to 0.35 for filter type Cosine.

[:SOURce]:BB:DAB:FILTer:PARameter:COSine:COFS

Sets the "cut off frequency shift" value for the Cosine filter type.

Parameters: float

Range: -1 to 1Increment: 0.01*RST: -0.1

Example: BB:DAB:FILT:PAR:COS:COFS 0.35sets the "cut of frequency shift' value to 0.35.

[:SOURce]:BB:DAB:FILTer:PARameter:GAUSs

Sets the B x T for the Gauss filter type.

Parameters: float


Example: BB:DAB:FILT:PAR:GAUS 0.5sets B x T to 0.5 for the Gauss filter type.

[:SOURce]:BB:DAB:FILTer:PARameter:LPASs

Sets the cut off frequency factor for the Lowpass filter (ACP Opt.) type.

Parameters: float


Example: BB:DAB:FILT:PAR:LPAS 0.5the cut of frequency factor is set to 0.5.

Filter Settings



[:SOURce]:BB:DAB:FILTer:PARameter:LPASSEVM

Sets the cut off frequency factor for the Lowpass filter (EVM Opt.) type.

Parameters: float

Range: 0.05 to 2.0*RST: 0.5

Example: BB:DAB:FILT:PAR:LPASSEVM 0.5the cut of frequency factor is set to 0.5.

[:SOURce]:BB:DAB:FILTer:PARameter:PGAuss

Sets the B x T for the Pure Gauss filter type.

Parameters: float


Example: BB:DAB:FILT:PAR:GAUS 0.5sets B x T to 0.5 for the Pure Gauss filter type.

[:SOURce]:BB:DAB:FILTer:PARameter:RCOSine

Sets the roll-off factor for the Root Cosine filter type.

Parameters: float


Example: BB:DAB:FILT:PAR:RCOS 0.22sets the roll-off factor to 0. 22 for filter type Root Cosine.

[:SOURce]:BB:DAB:FILTer:PARameter:SPHase

Sets the B x T for the Split Phase filter type.

Parameters: float

Range: 0.15 to 2.5Increment: 0.01*RST: 2

Example: BB:DAB:FILT:PAR:SPH 0.5sets B x T to 0.5 for the Split Phase filter type.

Filter Settings



[:SOURce]:BB:DAB:SRATe:VARiation

Enters the output sample rate.

A variation of this parameter only affects the ARB clock rate, all other signal parame-ters remain unchanged. If the sampling rate in the frame configuration menu ischanged, this parameter is reset to the chosen sampling rate.

Parameters: float

Range: 400 to 3E6Increment: 0.001 Hz*RST: 2.048 MHz

Example: BB:DAB:SRAT:VAR 40 MHzsets the output sample rate to 40 MHz.

4.4 Clipping Settings

This section list the remote control commands, necessary to configure the clipping set-ting.

Clipping settings are available for R&S WinIQSIM2 only.

[:SOURce]:BB:DAB:CLIPping:LEVel.......................................................................... 41[:SOURce]:BB:DAB:CLIPping:MODE......................................................................... 41[:SOURce]:BB:DAB:CLIPping:STATe.........................................................................42

[:SOURce]:BB:DAB:CLIPping:LEVel

Sets the limit for clipping.

Parameters: float

Range: 0 to 100Increment: 1*RST: 100Default unit: PCT

Example: BB:DAB:CLIP:LEV 25

[:SOURce]:BB:DAB:CLIPping:MODE

Selects the clipping method.

Parameters: VECTor | SCALar

*RST: VECTor

Clipping Settings



Example: BB:DAB:CLIP:MODE SCAL

[:SOURce]:BB:DAB:CLIPping:STATe

Switches baseband clipping on and off.


*RST: 0

Example: BB:DAB:CLIP:STAT ON

4.5 Trigger Settings

This section list the remote control commands, necessary to configure the trigger set-tings.

The trigger settings are available for R&S SMx and R&S AMU instruments only.

[:SOURce]:BB:DAB:TRIGger:ARM:EXECute.............................................................. 42[:SOURce]:BB:DAB:TRIGger:EXECute.......................................................................42[:SOURce]:BB:DAB:TRIGger:EXTernal:SYNChronize:OUTPut..................................... 43[:SOURce]:BB:DAB:TRIGger:OBASeband:DELay....................................................... 43[:SOURce]:BB:DAB:TRIGger:OBASeband:INHibit....................................................... 44[:SOURce]:BB:DAB:TRIGger:RMODe?...................................................................... 44[:SOURce]:BB:DAB:TRIGger:SLENgth.......................................................................45[:SOURce]:BB:DAB:TRIGger:SOURce....................................................................... 45[:SOURce]:BB:DAB:TRIGger[:EXTernal]:DELay...................................................45[:SOURce]:BB:DAB:TRIGger[:EXTernal]:INHibit...................................................46[:SOURce]:BB:DAB[:TRIGger]:SEQuence.................................................................. 46

[:SOURce]:BB:DAB:TRIGger:ARM:EXECute

Stops signal generation for trigger modes "Armed Auto" and "Armed Retrigger". A sub-sequent internal or external trigger event restart signal generation.

Example: BB:DAB:TRIG:ARM:EXECstops signal generation for trigger modes "Armed Auto" and"Armed Retrigger".

Usage: Event

[:SOURce]:BB:DAB:TRIGger:EXECute

Executes a trigger. The internal trigger source must be selected using the commandSOUR:BB:DAB:TRIG:SOUR INT and a trigger mode other than "AUTO" must beselected using the command SOUR:BB:DAB:TRIG:SEQ.

Trigger Settings



Example: BB:DAB:TRIG:SOUR INTsets internal triggering.BB:DAB:TRIG:SEQ RETRsets Retrigger mode, i.e. every trigger event causes signal gen-eration to restart.BB:DAB:TRIG:EXECexecutes a trigger.

Usage: Event

[:SOURce]:BB:DAB:TRIGger:EXTernal:SYNChronize:OUTPut

(enabled for "Trigger Source" External)

Enables/disables output of the signal synchronous to the external trigger event.


ONThe signal calculation starts simultaneously with the externaltrigger event but because of the instrument’s processing timethe first samples are cut off and no signal is outputted. Afterelapsing of the internal processing time, the output signal is syn-chronous to the trigger event.For two or more R&S SMBVs configured to work in a master-slave mode for synchronous signal generation, enable thisparameter in the slave instruments, in case the master instru-ment provides the slaves with its internal trigger signal.OFFThe signal output begins after elapsing of the processing timeand starts with sample 0, i.e. the complete signal is outputted.This mode is recommended for triggering of short signal sequen-ces with signal duration comparable with the processing time ofthe instrument.While working in a master-slave mode and a common externaltrigger event is provided for the master and the slave instru-ments, disable this parameter in the slave instruments*RST: 1

Example: BB:DAB:TRIG:SOUR EXTsets external triggering.BB:DAB:TRIG:EXT:SYNC:OUTP ONenables synchrounous output to external trigger

[:SOURce]:BB:DAB:TRIGger:OBASeband:DELay

Specifies the trigger delay (expressed as a number of samples) for external triggering.

Trigger Settings



Parameters: float


Example: BB:DAB:TRIG:SOUR EXTsets an external trigger.BB:DAB:TRIG:DEL 50sets a delay of 50 symbols for the trigger.

[:SOURce]:BB:DAB:TRIGger:OBASeband:INHibit

Specifies the number of samples by which a restart is to be inhibited following a triggerevent. This command applies only for triggering by the second path.

Parameters: float

Range: 0 to 2^32-1 samplesIncrement: 1 sample*RST: 0 samples

Example: BB:DAB:TRIG:SOUR OBASsets for path A the internal trigger executed by the trigger signalfrom the second path (path B).BB:DAB:TRIG:INH 200sets a restart inhibit for 200 samples following a trigger event.

[:SOURce]:BB:DAB:TRIGger:RMODe?

Queries the current status of signal generation for all trigger modes with DAB modula-tion on.

Return values: STOP | RUN

RUNthe signal is generated. A trigger event occurred in the triggeredmode.STOPthe signal is not generated. A trigger event did not occur in thetriggered modes, or signal generation was stopped by the com-mand BB:DAB:TRIG:ARM:EXECute (armed trigger modesonly).

Trigger Settings



Example: BB:DAB:TRIG:SOUR EXTsets external triggering.BB:DAB:TRIG:MODE ARETselects the Armed_Retrigger modeBB:DAB:TRIG:RMOD?queries the current status of signal generation.Response:RUNthe signal is generated, an external trigger was executed.

Usage: Query only

[:SOURce]:BB:DAB:TRIGger:SLENgth

Defines the length of the signal sequence in frames to be output in the "Single" triggermode (SOUR:BB:DAB:SEQ SING).Parameters: float

Range: 1 to 10000*RST: 1.0

Example: BB:DAB:SEQ SINGsets trigger mode Single.BB:DAB:TRIG:SLEN 200sets a sequence length of 200 frames. The current frame will beoutput 200 times after the next trigger event.

[:SOURce]:BB:DAB:TRIGger:SOURce

Selects the trigger source.

Parameters: INTernal|OBASeband|BEXTernal|EXTernal

INTernalmanual trigger or *TRG.EXTernal|BEXTernaltrigger signal on the TRIGGER 1/2 connector.OBASebandtrigger signal from the other path*RST: INTernal

Example: SOURce1:BB:DAB:TRIGger:SOURce EXTernalsets external triggering via the TRIGGER 1 connector.

[:SOURce]:BB:DAB:TRIGger[:EXTernal]:DELay

Specifies the trigger delay (expressed as a number of samples) for external triggering.

Trigger Settings



Parameters: float


Example: BB:DAB:TRIG:SOUR EXTsets an external trigger via the TRIGGER 1 connector.BB:DAB:TRIG:DEL 50sets a delay of 50 symbols for the trigger.

[:SOURce]:BB:DAB:TRIGger[:EXTernal]:INHibit

Specifies the number of samples by which a restart is to be inhibited following a triggerevent. This command applies only in the case of external triggering.

Parameters: float

Range: 0 to 67108863Increment: 1*RST: 0

Example: BB:DAB:TRIG:SOUR EXT1selects an external trigger via the TRIGGER 1 connector.BB:DAB:TRIG:INH 200sets a restart inhibit for 200 samples following a trigger event.

[:SOURce]:BB:DAB[:TRIGger]:SEQuence

Selects the trigger mode.

Trigger Settings



Parameters: AUTO | RETRigger | AAUTo | ARETrigger | SINGle

AUTOThe modulation signal is generated continuously.RETRiggerThe modulation signal is generated continuously. A trigger event(internal or external) causes a restart.AAUToThe modulation signal is generated only when a trigger eventoccurs. After the trigger event the signal is generated continu-ously, signal generation is stopped with commandSOUR:BB:DAB:TRIG:ARM:EXEC and started again when a trig-ger event occurs.ARETriggerThe modulation signal is generated only when a trigger eventoccurs. The device automatically toggles to RETRIG mode.Every subsequent trigger event causes a restart.Signal generation is stopped with commandSOUR:BB:DAB:TRIG:ARM:EXEC and started again when a trig-ger event occurs.SINGleThe modulation signal is generated only when a trigger eventoccurs. After the trigger event, the signal is generated once tothe set sequence length (SOUR:BB:DAB:TRIG:SLEN). Everysubsequent trigger event causes a restart.Signal generation is stopped with commandSOUR:BB:DAB:TRIG:ARM:EXEC and started again when a trig-ger event occurs.*RST: AUTO

Example: BB:DAB:SEQ AAUTsets the "Armed_auto" trigger mode; the device waits for the firsttrigger (e.g. with *TRG) and then generates the signal continu-ously.

4.6 Marker Settings

This section lists the remote control commands, necessary to configure the markers.

The marker delay settings are available for R&S SMx and R&S AMU instruments only.

[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay:FIXed....................................................48[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay...................................................... 48[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay:MAXimum?.....................................48[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay:MINimum?......................................49

Marker Settings



[:SOURce]:BB:DAB:TRIGger:OUTPut:MODE...................................................... 49[:SOURce]:BB:DAB:TRIGger:OUTPut:OFFTime.................................................. 50[:SOURce]:BB:DAB:TRIGger:OUTPut:ONTime.................................................... 50[:SOURce]:BB:DAB:TRIGger:OUTPut:PATTern................................................... 50[:SOURce]:BB:DAB:TRIGger:OUTPut:PULSe:DIVider.......................................... 51[:SOURce]:BB:DAB:TRIGger:OUTPut:PULSe:FREQuency?................................. 51

[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay:FIXed

Restricts the marker delay setting range to the current range. In this range the delaycan be set without restarting the marker and signal. If a delay is entered in setting ONbut is outside this range, the maximum possible delay is set and an error message isgenerated.

The numeric suffix in OUTPut has no significance for this command, since the settingalways affects every marker.


*RST: 0

Example: BB:DAB:TRIG:OUTP:DEL:FIX ONrestricts the marker signal delay setting range to the currentrange.

[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay

Defines the delay between the signal on the marker outputs and the start of the signal,expressed in terms of samples.

Command :BB:DAB:TRIGger:OUTPut:DELay:FIXed can be used to restrict therange of values to the dynamic range, i.e. the range within which a delay of the markersignals can be set without restarting the marker and signal.

Parameters: float

Range: 0 to 2^32-1samples*RST: 0

Example: BB:DAB:TRIG:OUTP:DEL 16000sets a delay of 16000 samples.

[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay:MAXimum?

Queries the maximum marker delay for setting :BB:DAB:TRIG:OUTP:DEL:FIX ON.Return values: float

Marker Settings



Example: BB:DAB:TRIG:OUTP:DEL:FIX ONrestricts the marker signal delay setting range to the dynamicrange.BB:DAB:TRIG:OUTP:DEL:MAX?queries the maximum of the dynamic range.Response:20000the maximum for the marker delay setting is 20000 samples.

Usage: Query only

[:SOURce]:BB:DAB:TRIGger:OUTPut:DELay:MINimum?

Queries the minimum marker delay for setting :BB:DAB:TRIGger:OUTPut:DELay:FIXed ON.Return values: float

Example: BB:DAB:TRIG:OUTP:DEL:FIX ONrestricts the marker signal delay setting range to the dynamicrange.BB:DAB:TRIG:OUTP:DEL:MIN?queries the minimum of the dynamic range.Response: "0"the minimum for the marker delay setting is 0 symbols.

Usage: Query only

[:SOURce]:BB:DAB:TRIGger:OUTPut:MODE

Defines the signal for the selected marker output.

Marker Settings



Parameters: RESTart | FRAMe | PULSe | PATTern | RATio | TRIGger

RESTartA marker signal is generated at the start of every sequencelength loop. Restart mode is available only for ETI data source.FRAMeA marker signal is generated at the start of every frame.PULSeA marker pulse is generated continuously according to the fre-quency and frequency divider.PATTernA marker signal is generated due to a bit pattern given by theuser. Each bit represents a sample and can be switched on oroff.RATioA regular marker signal that is defined by an ON/OFF ratio isgenerated. A period lasts one ON and OFF cycle.TRIGgerA received internal or external trigger signal is output at themarker connector.*RST: RESTart

Example: BB:DAB:TRIG:OUTP:MODE FRAMEselects the frame for the correspondent marker signal .

[:SOURce]:BB:DAB:TRIGger:OUTPut:OFFTime [:SOURce]:BB:DAB:TRIGger:OUTPut:ONTime Sets the number of samples in a period (ON time + OFF time) during which the markersignal in setting SOURce:BB:DAB:TRIGger:OUTPut:MODE RATio on the markeroutputs is ON.

Parameters: float

Range: 1 to 16777215*RST: 1

Example: BB:DAB:TRIG:OUTP2:ONT 2000sets an ON time of 2000 samples for marker 2.

[:SOURce]:BB:DAB:TRIGger:OUTPut:PATTern

Defines the bit pattern used to generate the marker signal.

Parameters:

*RST: 0

Marker Settings



Example: BB:DAB:TRIG:OUTP:PATT #H39FE0000,32sets the bit pattern.BB:DAB:TRIG:OUTP:MODE PATTactivates the marker signal according to a bit pattern of the cor-respondent marker.

[:SOURce]:BB:DAB:TRIGger:OUTPut:PULSe:DIVider

Sets the divider for the pulsed marker signal in the settingSOURce:BB:DAB:TRIGger:OUTPut:MODE PULSe. The pulse frequency is derivedby dividing the symbol rate by the divider.

Parameters: float


Example: BB:DAB:TRIG:OUTP2:PULS:DIV 2sets the divider for corresponding marker signal to the value 2.BB:DAB:TRIG:OUTP2:FREQ?queries the resulting pulse frequency of the marker signal.Response:66 000the resulting pulse frequency is 66kHz.

[:SOURce]:BB:DAB:TRIGger:OUTPut:PULSe:FREQuency?

Queries the pulse frequency of the pulsed marker signal in the set-ting :BB:DAB:TRIGger:OUTPut:MODE PULSe. The pulse frequency is derived bydividing the symbol rate by the divider. The divider is defined with com-mand :BB:DAB:TRIG:OUTP:PULS:DIV.Return values: float

Example: BB:DAB:TRIG:OUTP2:PULS:DIV 2sets the divider for the corresponding marker signal to the value2.BB:DAB:TRIG:OUTP2:MODE PULSenables the pulsed marker signal.BB:DAB:TRIG:OUTP2:FREQ?queries the resulting pulse frequency of the marker signal.Response: "66 000"the resulting pulse frequency is 66kHz.

Usage: Query only

Marker Settings



4.7 Clock Settings

This section lists the remote control commands, necessary to configure the clock.

The clock settings are available for R&S SMx and R&S AMU instruments only.

[:SOURce]:BB:DAB:CLOCk:MODE............................................................................52[:SOURce]:BB:DAB:CLOCk:MULTiplier......................................................................52[:SOURce]:BB:DAB:CLOCk:SOURce.........................................................................53[:SOURce]:BB:DAB:CLOCk:SYNChronization:EXECute...............................................53[:SOURce]:BB:DAB:CLOCk:SYNChronization:MODE.................................................. 53

[:SOURce]:BB:DAB:CLOCk:MODE

Enters the type of externally supplied clock (BB:DAB:CLOCk:SOURce EXTernal).When MSAM mode is used, a multiple of the sample clock is supplied and the clock isderived internally from it. The multiplier is entered with the commandBB:DAB:CLOCk:MULTiplier.For two-path instruments, the only numerical suffix allowed for SOURce is 1, since theexternal clock source is permanently allocated to path A.

Parameters: SAMPle | MSAMple

*RST: SAMP

Example: BB:DAB:CLOC:MODE MSAMsets the type of externally supplied clock.

[:SOURce]:BB:DAB:CLOCk:MULTiplier

Specifies the multiplier for clock type "Multiple Sample" (BB:DAB:CLOCk:MODEMSAMp) in the case of an external clock source.For two-path instruments, the only numerical suffix allowed for SOURce is 1, since theexternal clock source is permanently allocated to path A.

Parameters: float

Range: 1 to 64Increment: 1*RST: 4

Clock Settings



Example: BB:DAB:CLOC:SOUR EXTselects the external clock source.BB:DAB:CLOC:MODE MSAMselects clock type "Multiple Sample", i.e. the supplied clock hasa rate which is a multiple of the sample rate.BB:DAB:CLOC:MULT 12the multiplier for the external clock rate is 12.

[:SOURce]:BB:DAB:CLOCk:SOURce

Selects the clock source.

For two-path instruments, selecting EXTernal is only possible for path A, since theexternal clock source is permanently allocated to path A.

Parameters: INTernal | EXTernal

INTernalThe internal clock reference is used.EXTernalThe external clock reference is supplied to the CLOCK connec-tor. Commands :BB:DAB:CLOCk:MODE and :MULTiplier areused to enter the type of the external clock.*RST: INTernal

Example: BB:DAB:CLOC:SOUR EXTselects the external clock source. The clock is supplied via theCLOCK connector.BB:DAB:CLOC:MODE MSAMselects clock type "Multiple Sample", i.e. the supplied clock hasa rate which is a multiple of the sample rate.BB:DAB:CLOC:MULT 12the multiplier for the external clock rate is 12.

[:SOURce]:BB:DAB:CLOCk:SYNChronization:EXECute

Performs automatically adjustment of the instrument's settings required for the syn-chronization mode, set with the command BB:DAB:SYNC:MODE.Example: BB:DAB:CLOC:SYNC:MODE MAST

the instrument is configured to work as a master one.BB:DAB:CLOCK:SYNC:EXECall synchronization's settings are adjusted accordingly.

Usage: Event

[:SOURce]:BB:DAB:CLOCk:SYNChronization:MODE

Selects the synchronization mode

Clock Settings



This parameter is used to enable generation of very precise synchronous signal of sev-eral connected R&S SMBVs.

Note: If several instruments are connected, the connecting cables from the masterinstrument to the slave one and between each two consecutive slave instruments musthave the same length and type. Avoid unnecessary cable length and branching points.

Parameters: NONE | MASTer | SLAVe

NONEThe instrument is working in stand-alone mode.MASTerThe instrument provides all connected instrument with its syn-chronisation (including the trigger signal) and reference clocksignal.SLAVeThe instrument receives the synchronisation and reference clocksignal from another instrument working in a master mode.*RST: NONE

Example: BB:DAB:CLOC:SYNC:MODE MASTthe instrument is configured to work as a master one.

Clock Settings

List of CommandsDAB / T-DMB


List of Commands[:SOURce]:BB:DAB:CLIPping:LEVel...................................................................................................... 41[:SOURce]:BB:DAB:CLIPping:MODE..................................................................................................... 41[:SOURce]:BB:DAB:CLIPping:STATe.....................................................................................................42[:SOURce]:BB:DAB:CLOCk:MODE........................................................................................................ 52[:SOURce]:BB:DAB:CLOCk:MULTiplier..................................................................................................52[:SOURce]:BB:DAB:CLOCk:SOURce.....................................................................................................53[:SOURce]:BB:DAB:CLOCk:SYNChronization:EXECute........................................................................53[:SOURce]:BB:DAB

digital standard: dab / t-dmb - rohde & schwarz · the dab system is suitable for satellite as well...

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