Rohde&Schwarz R&S®SMM-K40/-K41 GSM/EDGE, EDGE Evolution User Manual
R&S®SMM-K40/-K41
GSM/EDGE, EDGE Evolution
User Manual
(;ÝD`2)
1179204802
Version 04
This document describes the following software options:
●
R&S®SMM-K40 GSM/EDGE (1441.2020.xx)
●
R&S®SMM-K41 EDGE Evolution (1441.2014.xx)
This manual describes firmware version FW 5.00.044.xx and later of the R&S®SMM100A.
© 2021 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: +49 89 41 29 - 0
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.
1179.2048.02 | Version 04 | R&S®SMM-K40/-K41
The following abbreviations are used throughout this manual: R&S®SMM100A is abbreviated as R&S SMM, R&S®WinIQSIM2TM is
abbreviated as R&S WinIQSIM2; the license types 02/03/07/11/13/16/12 are abbreviated as xx.
R&S®SMM-K40/-K41
Contents
1 Welcome to the GSM/EDGE and EDGE evolution digital standard
................................................................................................................. 5
1.1 Accessing the GSM/EDGE dialog................................................................................6
1.2 What's new.....................................................................................................................6
1.3 Documentation overview..............................................................................................6
1.3.1 Getting started manual....................................................................................................6
1.3.2 User manuals and help................................................................................................... 6
1.3.3 Service manual............................................................................................................... 7
1.3.4 Instrument security procedures.......................................................................................7
1.3.5 Printed safety instructions............................................................................................... 7
1.3.6 Data sheets and brochures............................................................................................. 7
Contents
1.3.7 Release notes and open source acknowledgment (OSA).............................................. 7
1.3.8 Application notes, application cards, white papers, etc...................................................8
1.4 Scope............................................................................................................................. 8
1.5 Notes on screenshots...................................................................................................8
2 About the GSM/EDGE options.............................................................. 9
2.1 Required options...........................................................................................................9
2.2 GSM/EDGE.....................................................................................................................9
2.3 VAMOS (voice services over adaptive multi-user channels on one slot).............. 10
3 GSM/EDGE configuration and settings..............................................13
3.1 General settings.......................................................................................................... 13
3.2 Trigger settings........................................................................................................... 16
3.3 Marker settings............................................................................................................20
3.4 Clock settings..............................................................................................................22
3.5 Local and global connectors settings.......................................................................23
3.6 Mode unframed........................................................................................................... 23
3.7 Mode framed (single).................................................................................................. 25
3.8 Mode framed (double).................................................................................................27
3.9 Save recall frame/slots............................................................................................... 28
3.10 Modulation/filter.......................................................................................................... 30
3.10.1 General settings............................................................................................................ 30
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3.10.2 MSK/FSK settings......................................................................................................... 31
3.10.3 AQPSK settings............................................................................................................ 33
3.10.4 8 PSK/EDGE settings................................................................................................... 34
3.10.5 16QAM settings.............................................................................................................35
3.10.6 32QAM settings.............................................................................................................35
3.10.7 HSR QPSK settings...................................................................................................... 36
3.10.8 HSR 16QAM settings.................................................................................................... 37
3.10.9 HSR 32QAM settings.................................................................................................... 38
3.10.10 ARB settings................................................................................................................. 39
3.11 Power ramping/slot attenuation................................................................................ 39
3.12 Burst editor..................................................................................................................43
3.13 Slot marker definition................................................................................................. 55
Contents
4 Remote-control commands.................................................................60
4.1 General commands.....................................................................................................61
4.2 Save/recall frame/slots commands........................................................................... 67
4.3 Modulation/filter commands...................................................................................... 72
4.3.1 Modulation commands.................................................................................................. 72
4.3.2 Filter commands............................................................................................................76
4.4 Clock commands........................................................................................................ 79
4.5 Trigger commands......................................................................................................80
4.6 Marker commands...................................................................................................... 83
4.7 Power ramping/slot attenuation commands............................................................ 86
4.8 Burst editor commands..............................................................................................88
4.9 Slot marker definition commands............................................................................. 99
List of commands.............................................................................. 100
Index....................................................................................................103
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1 Welcome to the GSM/EDGE and EDGE
evolution digital standard
The R&S SMM-K40 is a firmware application that adds functionality to generate signals
in accordance with the GSM/EDGE standard, based on the GMSK and 8PSK modulation. Option R&S SMM-K41 EDGE Evolution extends the GSM/EDGE signal generation with simulation of higher order modulations (QPSK, 16QAM and 32QAM) for
higher symbol rate bursts and higher order modulations (16QAM and 32QAM) for normal symbol rate bursts.
The R&S SMM-K40 features:
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●
●
●
●
Welcome to the GSM/EDGE and EDGE evolution digital standard
Generation of all GSM variants. There is no restriction regarding the use of GSM
slots, EDGE slots and EDGE Evolution slots.
Generation of both the transmitter signal of a base station (BS) and the transmitter
signal of user equipment (UE).
Configuration of all kind of GSM/EDGE data bursts Normal (full rate and half rate)
and EDGE; control bursts Access, Frequency Correction and Synchronization; a
Dummy Burst; and bursts for test purposes, All_Data (GSM and EDGE).
Generation of half rate slots and multi slots for HSCSD (high speed circuit switched
data) and (E)GPRS (general packet radio service) configurations at the physical
level.
Allocation of multiple slots to a single connection (channel banding).
Three configuration modes for each the normal and the higher symbol rate mode:
unframed, frame (single) and frame (double)
The R&S SMM-K41 features:
●
Generation of burst types defined for normal symbol rate and higher order modulation schemes such as the data burst Normal (16QAM and 32QAM) and All_Data
(16QAM and 32QAM) as well as with the burst types defined for higher symbol
rates HSR (QPSK, 16QAM and 32QAM) and HSR All_Data (QPSK, 16QAM and
32QAM).
●
Configuration and generation of burst for VAMOS operation. Available are All_Data
(AQPSK) and Normal (AQPSK) bursts for full and half rate operation.
For more information, see data sheet.
This user manual contains a description of the functionality that the application provides, including remote control operation.
All functions not discussed in this manual are the same as in the base unit and are
described in the R&S SMM100A user manual. The latest version is available at:
www.rohde-schwarz.com/manual/SMM100A
Installation
You can find detailed installation instructions in the delivery of the option or in the
R&S SMM100A service manual.
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1.1 Accessing the GSM/EDGE dialog
To open the dialog with GSM/EDGE settings
► In the block diagram of the R&S SMM100A, select "Baseband > GSM/EDGE".
The signal generation is not started immediately. To start signal generation with the
default settings, select "State > On".
1.2 What's new
This manual describes firmware version FW 5.00.044.xx and later of the
R&S®SMM100A.
Compared to the previous version there are editorial changes only.
Welcome to the GSM/EDGE and EDGE evolution digital standard
Documentation overview
A dialog box opens that displays the provided general settings.
1.3 Documentation overview
This section provides an overview of the R&S SMM100A user documentation. Unless
specified otherwise, you find the documents on the R&S SMM100A product page at:
www.rohde-schwarz.com/manual/smm100a
1.3.1 Getting started manual
Introduces the R&S SMM100A 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.
1.3.2 User manuals and help
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 getting started manual.
●
Software option manual
Contains the description of the specific functions of an option. Basic information on
operating the R&S SMM100A is not included.
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The contents of the user manuals are available as help in the R&S SMM100A. The
help offers quick, context-sensitive access to the complete information for the base unit
and the software options.
All user manuals are also available for download or for immediate display on the Internet.
1.3.3 Service manual
Describes the performance test for checking compliance with rated specifications, firmware update, troubleshooting, adjustments, installing options and maintenance.
The service manual is available for registered users on the global Rohde & Schwarz
information system (GLORIS):
https://gloris.rohde-schwarz.com
1.3.4 Instrument security procedures
Welcome to the GSM/EDGE and EDGE evolution digital standard
Documentation overview
Deals with security issues when working with the R&S SMM100A in secure areas. It is
available for download on the Internet.
1.3.5 Printed safety instructions
Provides safety information in many languages. The printed document is delivered with
the product.
1.3.6 Data sheets and brochures
The data sheet contains the technical specifications of the R&S SMM100A. It also lists
the options and their order numbers and optional accessories.
The brochure provides an overview of the instrument and deals with the specific characteristics.
See www.rohde-schwarz.com/brochure-datasheet/smm100a
1.3.7 Release notes and open source acknowledgment (OSA)
The release notes list new features, improvements and known issues of the current
firmware version, and describe the firmware installation.
The open-source acknowledgment document provides verbatim license texts of the
used open source software.
See www.rohde-schwarz.com/firmware/smm100a
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1.3.8 Application notes, application cards, white papers, etc.
These documents deal with special applications or background information on particular topics.
See www.rohde-schwarz.com/application/smm100a
1.4 Scope
Tasks (in manual or remote operation) that are also performed in the base unit in the
same way are not described here.
In particular, it includes:
●
●
●
●
Welcome to the GSM/EDGE and EDGE evolution digital standard
Notes on screenshots
Managing settings and data lists, like saving and loading settings, creating and
accessing data lists, or accessing files in a particular directory.
Information on regular trigger, marker and clock signals and filter settings, if appropriate.
General instrument configuration, such as checking the system configuration, configuring networks and remote operation
Using the common status registers
For a description of such tasks, see the R&S SMM100A user manual.
1.5 Notes on screenshots
When describing the functions of the product, we use sample screenshots. These
screenshots are meant to illustrate as many as possible of the provided functions and
possible interdependencies between parameters. The shown values may not represent
realistic usage scenarios.
The screenshots usually show a fully equipped product, that is: with all options installed. Thus, some functions shown in the screenshots may not be available in your particular product configuration.
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2 About the GSM/EDGE options
2.1 Required options
The basic equipment layout for generating GSM/EDGE signals includes the options:
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●
●
●
●
You can generate signals via play-back of waveform files at the signal generator. To
create the waveform file using R&S WinIQSIM2, you do not need a specific option.
To play back the waveform file at the signal generator, you have two options:
●
●
About the GSM/EDGE options
GSM/EDGE
Baseband Generator(R&S SMM-B9)
Baseband real-time extension (R&S SMM-K520)
Option GSM/EDGE (R&S SMM-K40)
Option EDGE evolution (R&S SMM-K41)
Frequency option (e.g. R&S SMM-B1006)
Install the R&S WinIQSIM2 option of the digital standard, e.g. R&S SMM-K255 for
playing LTE waveforms
If supported, install the real-time option of the digital standard, e.g. R&S SMM-K55
for playing LTE waveforms
For more information, see data sheet.
2.2 GSM/EDGE
GSM is a TDMA standard for cellular mobile radio networks.
Every TDMA frame consists of eight timeslots (or simply "slots"). Each slot can be separately turned on or off. A maximum of seven different level attenuation values can be
defined and allocated separately to the eight slots independently of one another.
To configure a slot, it is necessary to define a burst type. Different burst types are available, depending on the installed options. Available are burst types defined for normal
symbol rate and higher-order modulation schemes and with the burst types defined for
higher symbol rates HSR.
Higher symbol rates are achieved by reduction of the symbol period and employing of
higher symbol rate bursts (HB) instead of the normal burst (NB). A normal burst contains 116 encrypted symbols and uses timeslots with normal duration (156 or 157 symbols long). The higher symbol rate bursts carry information on full rate packet traffic
channels, contain 138 encrypted symbols and use timeslots with reduced symbol duration (187 or 188 symbols long).
The modulation data is continuously inserted into the chosen slots. In this fashion, the
data generator uses a digital signal processor to generate a data stream complete with
modulation data and control signals for power ramping.
This data stream is converted into I/Q signals in the modulation encoder.
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The R&S SMM100A processes the signal depending on the configured modulation
scheme and selected symbol rate mode:
●
●
●
●
About the GSM/EDGE options
VAMOS (voice services over adaptive multi-user channels on one slot)
In accordance with the GSM standard, the MSK modulation type is set by default to
a symbol rate of 270.833 ksymb/s and gauss filtering.
You can adjust the symbol rate. Also, you can use an FSK modulation with configurable span.
In accordance with the standard, the EDGE slots use 8PSK modulation type with
3/8 rotation at a symbol rate of 270.833 ksymb/s and gauss linearized filtering.
In accordance to EDGE evolution specifications (option R&S SMM-K41), the EDGE
evolution slots in a normal burst (NB) are 16QAM or 32QAM modulated. They use
a symbol rate of 270.833 ksymb/s and are gauss linearized filtered. The EDGE
evolution slots in higher symbol rate bursts (HB) are QPSK, 16QAM or 32QAM
modulated. They use a symbol rate of 325 ksymb/s and are spectrally narrow or
wide pulse shape filtered.
In accordance to VAMOS specifications (option R&S SMM-K41), the slots are
AQPSK modulated at a symbol rate of 270.833 ksymb/s and gauss linearized filtering.
You can configure the GSM/EDGE signal in on of the following modes:
●
Mode unframed - a signal with standard-compliant modulation parameters but
without slot and frame structure is generated.
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Mode frame (single) - a signal consisting of a frame is generated; it is also possible to choose half rate bursts and to define multi-slots.
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Mode frame (double) - a signal consisting of two frames is generated; the frames
are repeated according to a defined default.
2.3 VAMOS (voice services over adaptive multi-user channels on one slot)
According to 3GPP TS 45.001, with VAMOS it is possible to serve two MS simultaneously on the same physical resource. Thus the voice channel capacity in the CS
domain can be doubled.
Each of the two VAMOS users is assigned a so-called VAMOS subchannel, i.e. the
physical radio resource is split into two subchannels, one for each VAMOS user. The
two subchannels are separated in uplink and downlink via training sequences. For this
purpose, 3GPP TS 45.002 defines two sets of training sequence codes (TSC). One
VAMOS user/subchannel gets a training sequence from TSC set 1, the other from TSC
set 2. This ensures that the two training sequences have a low cross-correlation. All
mobiles must support TSC set 1, but only mobiles explicitly indicating support for
VAMOS must also support TSC set 2.
In the uplink, two GMSK modulated signals interfere with each other and the base station receiver requires an advanced multi-user detection algorithm.
In the downlink, a novel modulation scheme is used for each subchannel. The two subchannels are combined orthogonally by mapping them to the I and Q axis. This results
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in a QPSK modulation scheme, where each constellation point has a subchannel 1
component and a subchannel 2 component, as shown in the following figure.
About the GSM/EDGE options
VAMOS (voice services over adaptive multi-user channels on one slot)
Figure 2-1: QPSK modulation, sum of both subchannels
In this figure, both subchannels use the same power level. VAMOS allows subchannelspecific power control, so that the two subchannels can use different power levels, e.g.
when the two users are located at different distances from the base station. The resulting modulation scheme is called adaptive QPSK (AQPSK). The following figure shows
an example where subchannel 2 mapped to the Q-axis uses a higher power level than
subchannel 1 mapped to the I-axis.
Figure 2-2: AQPSK modulation, subchannel 2 with higher power level
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The power level of subchannel 2 relative to the power level of subchannel 1 is called
subchannel power imbalance ratio (SCPIR). It is related to the angle α as follows:
SCPIR = 20 * log10(tan α) dB
Where the value of α is chosen such that |SCPIR|≤10dB
For α = 45° the SCPIR equals 0 dB and the two power levels are equal.
AQPSK modulation is applied in the downlink if speech frames have to be transmitted
on both subchannels simultaneously.
In this implementation, you can set the SCPIR and configure the VAMOS subchannels,
TSC set and TSC used. The available VAMOS settings depend on the mode the signal
is generated in:
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●
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About the GSM/EDGE options
VAMOS (voice services over adaptive multi-user channels on one slot)
"Unframed"
Two data sources are provided, one per each VAMOS subchannel; the data is
AQPSK modulated but only one SCPIR can be configured.
"Framed (Single)"
Full rate, half rate and combination of both slot types are supported. The characteristics of each of the half rate slots can be adjusted individually
Separate data source is provided per each VAMOS subchannel and each user in
half rate mode; the data is AQPSK modulated and eight SCPIRs can be configured
Training sequence (TSC) set and TSC used can be configured on a VAMOS subchannel/User basis
"Framed (Double)"
The settings of each of the two frames are as in the "Framed (Single)" mode.
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3 GSM/EDGE configuration and settings
Access:
► Select "Baseband > GSM/EDGE".
The remote commands required to define these settings are described in Chapter 4,
"Remote-control commands", on page 60.
3.1 General settings
This tab provides access to the default and the "Save/Recall" settings. The selected
sequence mode determines the available parameters.
GSM/EDGE configuration and settings
General settings
Settings
State..............................................................................................................................13
Set to Default................................................................................................................ 14
Save/Recall...................................................................................................................15
Generate Waveform File…............................................................................................15
Sequence Mode............................................................................................................15
Symbol Rate Mode........................................................................................................15
Simulation Mode........................................................................................................... 15
Modulation/Filter/ARB................................................................................................... 16
Power Ramp/Slot Attenuations..................................................................................... 16
State
Activates the standard and deactivates all the other digital standards and digital modulation modes in the same path.
Remote command:
[:SOURce<hw>]:BB:GSM:STATe on page 67
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Set to Default
Calls the default settings. The values of the main parameters are listed in the following
table.
Parameter Value
State Not affected by "Set to Default"
Mode Framed (single)
GSM/EDGE configuration and settings
General settings
Modulation
Symbol Rate Mode Normal Symbol Rate
Symbol Rate 270.833 ksymb/s
Ignore 1/4... Off
Force Dummy Bits to 1 Off
Mod. Type GSM MSK 1bit/sym
Filter Gauss
Filter Par. BT 0.3
Power Ramp Control
Ramp Time 2 sym
Function Cosine
Slot Attenuation 1...7 0 dB
Slot 0 Configuration
Burst Type Normal (full rate)
Slot Level Full
Multislot Off
Number of Slots 1
Data PRBS 9
Use Stealing Flag On
Stealing Flag 0
TSC Set 1, TSC 0
Slot 1 to 7 Configuration
Slot Level,
other settings as slot 0
Off
Remote command:
[:SOURce<hw>]:BB:GSM:PRESet on page 63
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Save/Recall
Accesses the "Save/Recall" dialog, that is the standard instrument function for saving
and recalling the complete dialog-related settings in a file. The provided navigation
possibilities in the dialog are self-explanatory.
The settings are saved in a file with predefined extension. You can define the filename
and the directory, in that you want to save the file.
See also, chapter "File and Data Management" in the R&S SMM100A user manual.
Remote command:
[:SOURce<hw>]:BB:GSM:SETTing:CATalog? on page 64
[:SOURce<hw>]:BB:GSM:SETTing:LOAD on page 65
[:SOURce<hw>]:BB:GSM:SETTing:STORe on page 65
[:SOURce<hw>]:BB:GSM:SETTing:DELete on page 64
Generate Waveform File…
With enabled signal generation, triggers the instrument to save the current settings of
an arbitrary waveform signal in a waveform file with predefined extension *.wv. You
can define the filename and the directory, in that you want to save the file.
Using the ARB modulation source, you can play back waveform files and/or process
the file to generate multi-carrier or multi-segment signals.
Remote command:
[:SOURce<hw>]:BB:GSM:WAVeform:CREate on page 67
GSM/EDGE configuration and settings
General settings
Sequence Mode
Selects GSM/EDGE mode.
There are three modes available:
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Unframed
See Chapter 3.6, "Mode unframed", on page 23
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Framed (single)
See Chapter 3.7, "Mode framed (single)", on page 25
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Framed (double)
See Chapter 3.8, "Mode framed (double)", on page 27
Remote command:
[:SOURce<hw>]:BB:GSM:MODE on page 63
Symbol Rate Mode
(with option R&S SMM-K41 EDGE Evolution)
Set the symbol rate mode, i.e. determines whether a normal burst (NB) or higher sym-
bol rate bursts (HB) is generated.
Remote command:
[:SOURce<hw>]:BB:GSM:SRATe:MODE on page 66
Simulation Mode
Selects the modulation for the signal for the "Unframed" "Sequence Mode"
The signal is generated without slot or frame structure.
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The available simulation modes depend on the selected symbol rate:
●
●
For GSM, the modulation to be used (MSK or FSK) is set by means of the parameter
"Modulation" in the "Modulation/Filter" menu.
Note: "Higher Symbol Rate Mode" and "Simulation Modes" AQPSK, 16QAM, 32QAM,
HSR QPSK, HSR 16QAM and HSR 32QAM require option R&S SMM-K41 EDGE Evolution
Remote command:
[:SOURce<hw>]:BB:GSM:SMODe on page 65
Modulation/Filter/ARB
Accesses the "Modulation/Filter/ARB" dialog, see Chapter 3.10, "Modulation/filter",
on page 30.
Remote command:
n.a.
GSM/EDGE configuration and settings
Trigger settings
Normal Symbol Rate - GSM (MSK or FSK), AQPSK, 8PSK/EDGE, 16QAM and
32QAM
Higher Symbol Rate - HSR QPSK, HSR 16QAM and HSR 32QAM.
Power Ramp/Slot Attenuations
Requires "Sequence Mode > Framed (Single)/Framed Double".
Accesses the "Power Ramp / Slot Attenuations" dialog, see Chapter 3.11, "Power
ramping/slot attenuation", on page 39. The dialog is used to set the power ramping
parameters and for setting values for the level attenuation in dB.
The currently selected ramp function and ramp time are displayed.
Remote command:
n.a.
3.2 Trigger settings
This tab provides access to the settings necessary to select and configure the trigger,
like trigger source, mode, trigger delay, trigger suppression, as well as to arm or trigger
an internal trigger manually. The current signal generation status is displayed in the
header of the tab together with information on the enabled trigger mode. As in the
"Marker" and "Clock" tabs, this tab provides also access to the settings of the related
connectors.
This section focuses on the available settings.
For information on how these settings affect the signal, refer to section "Basics on ..."
in the R&S SMM100A user manual.
Access:
► Select "Baseband > GSM/EDGE > Trigger In".
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Routing and enabling a trigger
The provided trigger signals are not dedicated to a particular connector. Trigger signals
can be mapped to one or more User x or T/M connectors.
Use the Local and global connectors settings to configure the signal mapping, the
polarity, the trigger threshold and the input impedance of the input connectors.
To route and enable a trigger signal, perform the following general steps:
●
●
GSM/EDGE configuration and settings
Trigger settings
This dialog comprises the settings required for configuring the trigger signal.
Define the signal source and the effect of a trigger event.
Select the "Trigger In > Mode" and "Trigger In > Source".
Define the connector where the selected signal is provided.
Use the "Global Connectors" settings.
Trigger Mode
Selects trigger mode, i.e. determines the effect of a trigger event on the signal generation.
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"Auto"
The signal is generated continuously.
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"Retrigger"
The signal is generated continuously. A trigger event (internal or external) causes a
restart.
●
"Armed Auto"
The signal is generated only when a trigger event occurs. Then the signal is generated continuously.
An "Arm" stops the signal generation. A subsequent trigger event (internal or external) causes a restart.
●
"Armed Retrigger"
The signal is generated only when a trigger event occurs. Then the signal is generated continuously. Every subsequent trigger event causes a restart.
An "Arm" stops signal generation. A subsequent trigger event (internal or external)
causes a restart.
●
"Single"
The signal is generated only when a trigger event occurs. Then the signal is generated once to the length specified at "Signal Duration".
Every subsequent trigger event (internal or external) causes a restart.
Remote command:
[:SOURce<hw>]:BB:GSM[:TRIGger]:SEQuence on page 80
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Signal Duration Unit
Defines the unit for describing the length of the signal sequence to be output in the
"Single" trigger mode.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:SLUNit on page 82
Trigger Signal Duration
Enters the length of the signal sequence to be output in the "Single" trigger mode.
Use this parameter to output part of the signal deliberately, an exact sequence of the
signal, or a defined number of repetitions of the signal.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:SLENgth on page 82
Running/Stopped
With enabled modulation, displays the status of signal generation for all trigger modes.
●
●
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:RMODe? on page 81
GSM/EDGE configuration and settings
Trigger settings
"Running"
The signal is generated; a trigger was (internally or externally) initiated in triggered
mode.
"Stopped"
The signal is not generated and the instrument waits for a trigger event.
Arm
Stops the signal generation until subsequent trigger event occurs.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:ARM:EXECute on page 81
Execute Trigger
For internal trigger source, executes trigger manually.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:EXECute on page 81
Trigger Source
The following sources of the trigger signal are available:
●
"Internal"
The trigger event is executed manually by the "Execute Trigger".
●
"External Global Trigger"
The trigger event is the active edge of an external trigger signal provided and configured at the User x connectors.
●
"Baseband Sync In"
In primary-secondary instrument mode, secondary instruments are triggered by the
active edge of the synchronization signal.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:SOURce on page 82
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Sync. Output to External Trigger/Sync. Output to Trigger
Enables signal output synchronous to the trigger event.
●
GSM/EDGE configuration and settings
Trigger settings
"On"
Corresponds to the default state of this parameter.
The signal calculation starts simultaneously with the trigger event. Because of the
processing time of the instrument, the first samples are cut off and no signal is output. After elapsing of the internal processing time, the output signal is synchronous
to the trigger event.
●
"Off"
The signal output begins after elapsing of the processing time. Signal output starts
with sample 0. The complete signal is output.
This mode is recommended for triggering of short signal sequences. Short sequences are sequences with signal duration comparable with the processing time of the
instrument.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:EXTernal:SYNChronize:OUTPut
on page 81
External Trigger Inhibit
Applies for external trigger signal.
Sets the duration with that any following trigger event is suppressed. In "Retrigger"
mode, for example, a new trigger event does not cause a restart of the signal generation until the specified inhibit duration does not expire.
For more information, see chapter "Basics" in the R&S SMM100A user manual.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger[:EXTernal]:INHibit on page 83
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Trigger Delay
Delays the trigger event of the signal from:
●
Use this setting to:
●
For more information, see chapter "Basics on ..." in the R&S SMM100A user manual.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger[:EXTernal]:DELay on page 83
3.3 Marker settings
This tab provides access to the settings necessary to select and configure the marker
output signal, like the marker mode or marker delay settings.
This section focuses on the available settings.
For information on how these settings affect the signal, refer to section "Basics on ..."
in the R&S SMM100A user manual.
GSM/EDGE configuration and settings
Marker settings
The external trigger source
Synchronize the instrument with the device under test (DUT) or other external devices
Access:
► Select "Baseband > GSM/EDGE > Marker".
This dialog comprises the settings required for configuring the marker.
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Routing and enabling a marker
The provided marker signals are not dedicated to a particular connector. They can be
mapped to one or more User x or T/M connectors.
To route and enable a marker signal, perform the following general steps:
●
●
Marker Mode
Marker configuration for up to 3 markers. The settings are used to select the marker
mode defining the shape and periodicity of the markers. The contents of the dialog
change with the selected marker mode.
"As defined in
Slots"
"Slot"
GSM/EDGE configuration and settings
Marker settings
Define the shape of the generated marker, i.e. select the "Marker > Mode".
Define the connector where the selected signal is provided.
Use the Local and global connectors settings.
The marker defined for each slot separately in the burst editor is
used. The name of the marker is displayed to the right of the selection. Definition of the slot marker is described in Chapter 3.13, "Slot
marker definition", on page 55.
A slot clock with the slot period specified under Period is generated
on the output connector. The marker signal is generated after every
specified number of slots.
It is important to be aware of the variation in the GSM/EDGE slot
length 156 to 157 symbols. At a slot length of 156 symbols, a period
of 1 symbol and a symbol rate of 270.833 ksymb/s the clock is
0.577 ms. At 157 symbols, it is 0.580 ms
"Restart"
"Frame "
"Pulse"
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:OUTPut<ch>:PULSe:DIVider on page 85
[:SOURce<hw>]:BB:GSM:TRIGger:OUTPut<ch>:PULSe[:FREQuency]?
on page 85
"Pattern"
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:OUTPut<ch>:PATTern on page 84
A marker signal is generated at the start of each ARB sequence.
A frame clock with the frame period specified under "Period" is gener-
ated on the output connector. The marker signal is generated after
every specified number of frames.
A GSM/EDGE frame has 1250 symbols. At a symbol rate of 270.833
ksymb/s and a period of 1, the clock is 4.615 ms.
A regular marker signal is generated. The pulse frequency is defined
by entering a divider. The frequency is derived by dividing the sample
rate by the divider. The input box for the divider opens when "Pulse"
is selected, and the resulting pulse frequency is displayed below it.
The maximum pulse frequency is half the symbol rate.
A marker signal that is defined by a bit pattern is generated. The pattern has a maximum length of 64 bits and is defined in an input field
which opens when pattern is selected.
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GSM/EDGE configuration and settings
Clock settings
"ON/OFF
Period"
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:OUTPut<ch>:ONTime on page 84
[:SOURce<hw>]:BB:GSM:TRIGger:OUTPut<ch>:OFFTime on page 84
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:OUTPut<ch>:MODE on page 84
Marker x Delay
Delays the marker signal at the marker output relative to the signal generation start.
Variation of the parameter "Marker x Delay" causes signal recalculation.
Remote command:
[:SOURce<hw>]:BB:GSM:TRIGger:OUTPut<ch>:DELay on page 86
A regular marker signal that is defined by an ON/OFF ratio is generated. A period lasts one ON and OFF cycle.
3.4 Clock settings
This tab provides access to the settings necessary to select and configure the clock
signal, like the clock source and clock mode.
This section focuses on the available settings.
For information on how these settings affect the signal, refer to section "Basics on ..."
in the R&S SMM100A user manual.
Access:
► Select "Baseband > GSM/EDGE > Clock".
This dialog comprises the settings required for configuring the clock.
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Defining the clock
The provided clock signals are not dedicated to a particular connector. They can be
mapped to one or more User x and T/M/C connectors.
Use the Local and global connectors settings to configure the signal mapping, the
polarity, the trigger threshold, and the input impedance of the input connectors.
To route and enable a trigger signal, perform the following general steps:
●
●
Clock Source
Selects the clock source.
●
Remote command:
[:SOURce<hw>]:BB:GSM:CLOCk:SOURce on page 79
GSM/EDGE configuration and settings
Mode unframed
Define the signal source, that is select the "Clock > Source".
Define the connector where the selected signal is provided.
Use the Local and global connectors settings.
"Internal"
The instrument uses its internal clock reference.
3.5 Local and global connectors settings
Each of the "Trigger In", "Marker" and "Clock" dialogs and the "Trigger Marker Clock"
dialog provides a quick access to the related connector settings.
See also chapter "Local and global connectors settings" in the user manual.
3.6 Mode unframed
1. To access this dialog select "General > Sequence Mode > Unframed".
2. Select "Unframed Configuration".
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In "Unframed" mode, a modulation signal without slot or frame structure is generated.
The modulated carrier without power ramping is often enough for initial tests, and in
case the complete signal is not yet needed.
GSM/EDGE configuration and settings
Mode unframed
This dialog displays the signal in "Unframed" mode - no frames, no power ramping.
Since all the modulation parameters for the signal are conform to the standard, only
the symbol rate mode and the modulation have to be selected. The symbol rate and
filter configuration are set accordingly.
This mode can be used for quick measurements of the spectrum or signal quality (e.g.
EVM).
Data
Selects data source.
The following standard data sources are available:
●
"All 0, All 1"
An internally generated sequence containing 0 data or 1 data.
●
"PNxx"
An internally generated pseudo-random noise sequence.
●
"Pattern"
An internally generated sequence according to a bit pattern.
Use the "Pattern" box to define the bit pattern.
●
"Data List/Select DList"
A binary data from a data list, internally or externally generated.
Select "Select DList" to access the standard "Select List" dialog.
– Select the "Select Data List > navigate to the list file *.dm_iqd > Select" to
select an existing data list.
– Use the "New" and "Edit" functions to create internally new data list or to edit
an existing one.
– Use the standard "File Manager" function to transfer external data lists to the
instrument.
See also:
●
Section "Modulation Data" in the R&S SMM100A user manual.
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●
●
Remote command:
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>][:SOURce]:DATA on page 92
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>][:SOURce]:DATA:PATTern on page 93
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>][:SOURce]:DATA:DLISt on page 92
3.7 Mode framed (single)
1. To access this dialog select "General > Sequence Mode > Framed (Single)".
2. Select "Framed (Single) Configuration".
GSM/EDGE configuration and settings
Mode framed (single)
Section "File and Data Management" in the R&S SMM100A user manual.
Section "Data List Editor" in the R&S SMM100A user manual
This dialog displays the frame structure and provides access to the dialog for saving and loading a frame structure.
The "Framed (single)" mode generates a modulation signal which is defined by the
structure of a single frame. The frame structure is repeated cyclically, but the useful
data is continuously generated.
The frame structure is displayed in graphical form. Slot parameters can be defined in
the burst editor, which is called when the slot is selected in the graphical display (see
Chapter 3.12, "Burst editor", on page 43). You can define half rate slots. The charac-
teristics of each half rate slot can be defined separately. Each active slot is represented
by a burst symbol. Two half rate slots occupy the space of a full rate slot. A slot in
which the level has been attenuated is represented by a lower amplitude burst. Inactive
slots (Slot Level = Off) are shown as a horizontal bar. Defined multislots are banded
and surrounded by a frame.
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When a half rate slot has been selected, two frames are generated alternately. Each
frame holds one of the two half rate users.
Example:
The following configuration is set, from a frame with two slots that contain half rate
users:
As a result, the following two frames are generated alternately:
●
GSM/EDGE configuration and settings
Mode framed (single)
Frame with half rate user 1:
●
Frame with half rate user 2
Save/Recall Frame …
Access the "Save/Recall Frame" dialog for selecting of predefined or user defined
frames, see Chapter 3.9, "Save recall frame/slots", on page 28.
Remote command:
n.a.
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3.8 Mode framed (double)
1. To access this dialog select "General > Sequence Mode > Framed (Double)".
2. Select "Framed (Double) Configuration".
GSM/EDGE configuration and settings
Mode framed (double)
This dialog displays the frame structure and gives access to the dialog for saving
and loading a frame structure.
The "Framed (double)" mode generates multiframe signals which are defined by the
structure of two frames.
For this purpose, two frames are defined as in "Framed (single)" mode. A repetition
factor is then specified for each of the two frames. Following a trigger the first frame is
repeated the specified number of times, and then the second frame. The frame structures are repeated cyclically, but the useful data is continuously generated.
If one of the frames contains half rate slots (and so actually consists of two frames
itself), the repetition factor must be a multiple of 2 (seeChapter 3.7, "Mode framed (sin-
gle)", on page 25 ).
The frame structure of the two frames is displayed in graphical form. Slot parameters
can be defined in the burst editor, which is called when the slot is selected in the
graphical display (seeChapter 3.12, "Burst editor", on page 43 ).
Save/Recall Frame …
Provides access to the "Save/Recall Frame" dialog for selecting of predefined or user
defined frames, see Chapter 3.9, "Save recall frame/slots", on page 28 .
Remote command:
n.a.
Frame Repetition
Sets the number of repetitions for frame 1 or frame 2. First frame 1 is repeated the
specified number of times, and then frame 2, then frame 1 starts again, and so on.
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Remote command:
[:SOURce<hw>]:BB:GSM:FRAMe<di>:REPetitions on page 62
3.9 Save recall frame/slots
1. To access these dialogs select "General > Sequence Mode > Framed (Single) /
2. Select "Framed (Single) / Framed (Double) Configuration" .
3. To access the "Save/Recall Frame" dialog, select "Save/Recall Frame"
4. To access the "Save/Recall Slots " dialog, select "Frame x: Select Slot to configure
The "File Select" dialogs save and load (i.e. recall) user-defined frames or slots. Predefined frames or slots can also be recalled. Each dialog offer access to the "File Manager" for general file management.
GSM/EDGE configuration and settings
Save recall frame/slots
Framed (Double)".
> Slot... > Save/Recall Slots"
Predefined Frames and Slots are stored on a predefined path. This path is automatically set in the "File Select" dialog.
In the Normal Symbol Rate mode, user-defined Frames and Slots are stored as files
with the specific file extensions *.gsm_fu or *.gsm_slu, respectively.
In the Higher Symbol Rate mode, user-defined Frames and Slots are stored as files
with the specific file extensions *.gsm_hfu or *.gsm_hslu, respectively. Independent of the selected symbol rate mode, the files with user-defined Frames and Slots can
be stored in a user-determined directory and called from there.
It is not possible to use other file extensions. Attempting to do so causes an error message. If the file extension is modified (e.g. by directly accessing the file system), the
files are no longer recognized and therefore invalid.
In the following examples of commands, the files are stored in the default directory
which is defined by command MMEM:CDIRectory.
Recall Predefined Files
Accesses the standard "File Select" dialog for loading a predefined frame/slot.
"EDGE0"
"EDGEAll"
"GsmEdge"
"NormalBurst0"
Predefined frame
Slot 0 = On, full level, EDGE burst, all other slots off.
Predefined frame
All slots On, full level, EDGE burst
Predefined frame
Alternately one slot with NORMAL burst and EDGE burst
Predefined frame
Slot 0 = On, full level, NORMAL burst (full rate), all other slots off
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"NormalBurstAll"
"GSM_NB_PN9_TSC0"
"GSM_NB_PN9_TSC0"
Remote command:
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:PREDefined:CATalog? on page 69
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:PREDefined:LOAD on page 70
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>]:PREDefined:CATalog? on page 70
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>]:PREDefined:LOAD on page 70
GSM/EDGE configuration and settings
Save recall frame/slots
Predefined frame
All slots On, full level, NORMAL burst (full rate)
Predefined slot
NORMAL burst (full rate), full level, attenuation A1, multislot = Off,
number of multislots = 1, Data = PRBS 9, Use Stealing Flag = On,
TSC0, all slot-marker set to "all down".
Predefined slot
EDGE burst (full rate), full level, attenuation A1, multislot = Off, number of multislots = 1, Data = PRBS 9, Use Stealing Flag = On, TSC0,
all slot-marker set to "all down"
Recall User Files
Access the standard "File Select" dialog for loading a user-defined frame/slot.
Remote command:
[:SOURce<hw>]:BB:GSM:FRAMe<di>:ULISt:CATalog? on page 68
[:SOURce<hw>]:BB:GSM:FRAMe<di>:ULISt:LOAD on page 69
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>]:ULISt:CATalog? on page 71
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>]:ULISt:LOAD on page 71
Save User Files
Access the standard "File Select" dialog for saving the current frame or slot settings.
Remote command:
[:SOURce<hw>]:BB:GSM:FRAMe<di>:ULISt:STORe on page 69
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>]:ULISt:STORe on page 72
File Manager
Access the standard "File Manager" dialog, used to copy, delete and rename files and
to create directories.
Remote command:
[:SOURce<hw>]:BB:GSM:FRAMe<di>:ULISt:DELete on page 68
[:SOURce<hw>]:BB:GSM[:FRAMe<di>]:SLOT<st0>[:SUBChannel<us>][:
USER<ch>]:ULISt:DELete on page 71
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3.10 Modulation/filter
This dialog provides access to the modulation and filter settings. The selected symbol
rate mode and symbol rate determine the available modulation types.
Access:
1. Select "Baseband > GSM/EDGE > General".
2. Select "Modulation/Filter...."
"Higher Symbol Rate Mode", AQPSK modulation and higher order modulations
(16QAM and 32QAM) are with option R&S SMM-K41 (EDGE evolution).
3.10.1 General settings
GSM/EDGE configuration and settings
Modulation/filter
This dialog contains the settings required for configuring the modulation types, the
corresponding filter settings and the ARB settings.
Access:
► Select "General".
This tab contains the parameters to configure the general modulation settings.
Settings:
Symbol Rate..................................................................................................................30
Ignore 1/4 symbol (slot length 156 sym) / Ignore ½ symbol (slot length 187 sym)....... 31
Force Dummy Bits to 1..................................................................................................31
Symbol Rate
Sets the symbol rate.
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