Rohde&Schwarz R&S®SMW200A TD-SCDMA user manual User Manual
R&S®SMW-K50/-K51
TD-SCDMA, incl. TD-SCDMA
Enhanced Features
User Manual
(;ÙÑË2)
1175676102
Version 18
This document describes the following software options:
●
R&S®SMW-K50 TD-SCDMA (1413.4039.xx)
●
R&S®SMW-K51 TD-SCDMA Enhanced Features (1413.4080.xx)
This manual describes firmware version FW 5.00.044.xx and later of the R&S®SMW200A.
© 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.
1175.6761.02 | Version 18 | R&S®SMW-K50/-K51
The following abbreviations are used throughout this manual: R&S®SMW200A is abbreviated as R&S SMW, 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®SMW-K50/-K51
Contents
1 Welcome to the TD-SCDMA digital standard.......................................7
1.1 Accessing the TD-SCDMA dialog................................................................................ 7
1.2 What's new.....................................................................................................................8
1.3 Documentation overview..............................................................................................8
1.3.1 Getting started manual....................................................................................................8
1.3.2 User manuals and help................................................................................................... 8
1.3.3 Tutorials...........................................................................................................................9
1.3.4 Service manual............................................................................................................... 9
1.3.5 Instrument security procedures.......................................................................................9
1.3.6 Printed safety instructions............................................................................................... 9
1.3.7 Data sheets and brochures............................................................................................. 9
Contents
1.3.8 Release notes and open source acknowledgment (OSA).............................................. 9
1.3.9 Application notes, application cards, white papers, etc.................................................10
1.4 Scope........................................................................................................................... 10
1.5 Notes on screenshots.................................................................................................10
2 About the TD-SCDMA options............................................................ 11
2.1 Required options.........................................................................................................11
2.2 About TD-SCDMA........................................................................................................11
2.3 Modulation system......................................................................................................12
2.3.1 TD-SCDMA signal structure (frames and time slots).................................................... 12
2.3.2 Dwpts and uppts........................................................................................................... 13
2.3.3 Structure of traffic burst.................................................................................................14
3 TD-SCDMA configuration and settings..............................................17
3.1 General settings.......................................................................................................... 18
3.2 Trigger settings........................................................................................................... 20
3.3 Marker settings............................................................................................................25
3.4 Clock settings..............................................................................................................26
3.5 Local and global connectors settings.......................................................................28
3.6 Common cell configuration settings.........................................................................28
3.7 Predefined settings.....................................................................................................31
3.8 Cell configuration........................................................................................................32
3User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
3.8.1 Common settings.......................................................................................................... 33
3.8.2 Slots.............................................................................................................................. 35
3.9 Enhanced channels settings......................................................................................37
3.9.1 Broadcast channels (BCH) common settings............................................................... 37
3.9.2 Broadcast channels (BCH) details settings...................................................................38
3.9.3 Dedicated channels (DCH) common settings............................................................... 39
3.9.4 Dedicated channels (DCH) details settings...................................................................42
3.9.5 Transport channel......................................................................................................... 44
3.9.6 RMC PLCCH channel settings......................................................................................47
3.9.7 RMC HS-SICH channel settings................................................................................... 49
3.9.8 Bit and block error insertion.......................................................................................... 50
3.10 HSDPA/HSUPA settings..............................................................................................51
3.10.1 HSDPA settings.............................................................................................................52
Contents
3.10.2 HSUPA settings.............................................................................................................53
3.10.3 HS-SCCH settings (HSDPA)......................................................................................... 55
3.10.4 Global settings.............................................................................................................. 56
3.10.5 Coding configuration..................................................................................................... 57
3.10.6 Signal structure............................................................................................................. 60
3.10.7 HARQ setup.................................................................................................................. 62
3.11 Slot configuration....................................................................................................... 63
3.11.1 Common settings.......................................................................................................... 63
3.11.2 Channel table................................................................................................................ 65
3.11.3 Code domain.................................................................................................................69
3.11.4 Channel graph...............................................................................................................71
3.12 DPCCH settings...........................................................................................................72
3.12.1 Slot structure and slot format........................................................................................ 73
3.12.2 TFCI settings.................................................................................................................74
3.12.3 Sync shift settings......................................................................................................... 75
3.12.4 E-UCCH settings...........................................................................................................76
3.12.5 TPC settings..................................................................................................................77
3.13 Slot mode PRACH settings........................................................................................ 79
3.13.1 Common settings.......................................................................................................... 80
3.13.2 Uppts settings............................................................................................................... 81
4User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
3.13.3 RACH message part settings........................................................................................82
3.14 Filter / clipping / ARB settings................................................................................... 84
3.14.1 Filter settings.................................................................................................................85
3.14.2 Clipping settings............................................................................................................86
3.14.3 ARB settings................................................................................................................. 88
3.15 Power ramping............................................................................................................ 89
4 Remote-control commands.................................................................91
4.1 General commands.....................................................................................................92
4.2 Filter / clipping / ARB settings................................................................................... 99
4.3 Trigger settings......................................................................................................... 103
4.4 Marker settings..........................................................................................................107
4.5 Clock settings............................................................................................................109
Contents
4.6 Predefined settings...................................................................................................109
4.7 Cell settings............................................................................................................... 111
4.8 Enhanced channels of cell 1.................................................................................... 115
4.9 Channel settings....................................................................................................... 131
4.10 HSDPA/HSUPA settings............................................................................................148
List of commands.............................................................................. 160
Index....................................................................................................165
5User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
Contents
6User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
1 Welcome to the TD-SCDMA digital standard
The R&S SMW-K50/-K51 are firmware applications that add functionality to generate
signals in accordance with the TD-SCDMA (3GPP TDD LCR) standard.
TD-SCDMA (3GPP TDD LCR) designates a mobile radio transmission method developed for 3G mobile communication by the China Wireless Telecommunication Standard group (CWTS). This standard is similar to the 3GPP TDD proposition, but with
greater emphasis placed on GSM compatibility and with a chip rate limited to
1.28 Mcps. TD-SCDMA is one option of UTRA-TDD, called 1.28Mcps TDD or low chip
rate (LCR) TDD.
The R&S SMW-K50 main features are:
●
●
●
●
●
Welcome to the TD-SCDMA digital standard
Accessing the TD-SCDMA dialog
Configuration of up to four TD-SCDMA cells with variable switching point of uplink
and downlink.
Freely configurable channel table for each slot and simulation of the downlink and
uplink pilot timeslot.
Real time generation of one traffic channel and the SYNC channel on the downlink
Slot modes "Dedicated" and "PRACH" on the uplink.
Clipping for reducing the crest factor
The R&S SMW-K51 option TD-SCDMA (3GPP TDD LCR) enhanced MS/BS tests incl.
HSDPA extends the TD-SCDMA signal generation with:
●
Simulation of high-speed channels in the downlink (HS-SCCH, HS-PDSCH) and
the uplink (HS-SICH)
●
Channel coding for BCH in real time
●
A reference measurement channel
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 SMW user manual. The latest version is available at:
www.rohde-schwarz.com/manual/SMW200A
Installation
You can find detailed installation instructions in the delivery of the option or in the
R&S SMW service manual.
1.1 Accessing the TD-SCDMA dialog
To open the dialog with TD-SCDMA settings
► In the block diagram of the R&S SMW, select "Baseband > TD-SCDMA".
A dialog box opens that displays the provided general settings.
7User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
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®SMW200A.
Compared to the previous version there are editorial changes only.
1.3 Documentation overview
This section provides an overview of the R&S SMW user documentation. Unless specified otherwise, you find the documents on the R&S SMW product page at:
www.rohde-schwarz.com/manual/smw200a
Welcome to the TD-SCDMA digital standard
Documentation overview
1.3.1 Getting started manual
Introduces the R&S SMW 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 SMW is not included.
The contents of the user manuals are available as help in the R&S SMW. 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.
8User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
1.3.3 Tutorials
The R&S SMW provides interactive examples and demonstrations on operating the
instrument in form of tutorials. A set of tutorials is available directly on the instrument.
1.3.4 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
1.3.5 Instrument security procedures
Deals with security issues when working with the R&S SMW in secure areas. It is available for download on the Internet.
Welcome to the TD-SCDMA digital standard
Documentation overview
1.3.6 Printed safety instructions
Provides safety information in many languages. The printed document is delivered with
the product.
1.3.7 Data sheets and brochures
The data sheet contains the technical specifications of the R&S SMW. 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/smw200a
1.3.8 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/smw200a
9User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
1.3.9 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/smw200a and www.rohde-schwarz.com/
manual/smw200a
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 TD-SCDMA 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 SMW 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.
10User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
2 About the TD-SCDMA options
2.1 Required options
The basic equipment layout for generating TD-SCDMA signals includes the:
●
●
●
●
●
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.
About the TD-SCDMA options
About TD-SCDMA
Standard or wideband baseband generator (R&S SMW-B10/-B9)
Baseband main module (R&S SMW-B13) or wideband baseband main module
(R&S SMW-B13XT)
Frequency option (e.g. R&S SMW-B1003)
Digital standard TD-SCDMA (R&S SMW-K50)
Option TD-SCDMA enhanced (R&S SMW-K51)
To play back the waveform file at the signal generator, you have two options:
●
Install the R&S WinIQSIM2 option of the digital standard, e.g. R&S SMW-K255 for
playing LTE waveforms
●
If supported, install the real-time option of the digital standard, e.g. R&S SMW-K55
for playing LTE waveforms
For more information, see data sheet.
2.2 About TD-SCDMA
TD-SCDMA is a mobile radio standard in which available bandwidth is divided among
subscribers according to frequency (FDMA), time (TDMA) and code (CDMA). The
same frequency is used for both directions of transmission (TDD). Each resource (i.e.
a combination of frequency, code and time slot) can be used simultaneously by several
base stations or user equipment provided the scrambling codes differ. A cell is understood to be a base station and all user equipment communicating with this base station. The R&S SMW simulates a maximum of four cells at the same frequency. The
multi-carrier mode can be used to simulate more than four cells at the same frequency
or cells at several frequencies.
HSDPA (high speed downlink packet access) mode enhances the TD-SCDMA standard by data channels with high data rates especially for multi-media applications.
The R&S SMW generates the TD-SCDMA signals in a combination of realtime mode
(real time channels) and arbitrary waveform mode. Simulation of bit and block errors
can be activated for the channels generated in real time. In arbitrary waveform mode,
the signal is first calculated and then output. The R&S SMW simulates TD-SCDMA at
the physical channel layer.
11User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
Parameters of the modulation system TD-SCDMA
Table 2-1: Parameters of the modulation system TD-SCDMA
Parameter Value
Chip rate 1.28 Mcps
Carrier spacing 1.6 MHz
Data modulation QPSK
Filter Root-raised cosine (0.22)
About the TD-SCDMA options
Modulation system
Channel types
Data rates 17.6 kbps, 35.2 kbps, 70.4 kbps to 281.6 kbps depending on channel type
Number of channels 4 cells, each containing max. 7 active slots. Each slot with up to 16 DPCHs and
Frame structure Frame: 5 ms with 7 (traffic) time slots.
Scrambling code 128 different codes with length of 16 chips
SYNC codes 32 different codes with length of 64 chips
SYNC1 codes 256 different codes with length of 128 chips
Downlink :
●
Primary Common Control Physical Channel (P-CCPCH)
●
Secondary Common Control Physical Channel (S-CCPCH)
●
Physical Forward Access Channel (F-FACH)
●
Downlink Pilot Time Slot (DwPTS)
●
Dedicated Physical Channel (DPCH)
Uplink :
●
Physical Random Access Channel (P-RACH)
●
Uplink Pilot Time Slot (UpPTS)
Dedicated Physical Channel (DPCH)
5 special channels.
Time slot (traffic): 675 µs
Time slot (DwPTS): 75 µs
Time slot (UpPTS): 125 µs
The number of symbols transmitted in a slot depends on the symbol rate.
Basic midamble codes 128 different codes with length of 128 chips
Spreading code "Orthogonal Variable Spreading Factor Code (OVSF)"; spreading factors 1, 2,
4, 8, 16
2.3 Modulation system
2.3.1 TD-SCDMA signal structure (frames and time slots)
The TDSCDMA signal is organized in frames of 5 ms length. Each frame comprises
seven traffic time slots (Ts0 to Ts6, each 0.675 ms) and two special time slots (DwPTS
and UpPTS) for synchronization.
12User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
Figure 2-1: Structure of TDSCDMA frame
Ts0 is always allocated to the downlink, Ts1 to the uplink. The other time slots are divided between the two directions of transmission, the switching point being variable.
2.3.2 Dwpts and uppts
In the downlink pilot time slot (DwPTS), the base station sends one of 32 possible 64chip SYNC codes. The SYNC code allows the user equipment to synchronize to the
base station. At the same time, the SYNC code defines the value range for the scrambling code and the basic midamble code.
About the TD-SCDMA options
Modulation system
Figure 2-2: Structure of DwPTS
The real-valued SYNC sequence is converted into a complex-valued SYNC sequence
by a rotating-vector operation.
This SYNC sequence is divided up into four symbols with 16 chips each. The symbols
are phase-modulated (possible phases are 45°, 135°, 225° and 315°) in order to signal
the frame number of the interleaver.
In the supplied software, all symbols are modulated with 45°.
The uplink pilot time slot (UpPTS) is sent by the user equipment to initiate a call with
the base station (before a P-RACH is sent, for example). The transmitted SYNC1 code
is randomly selected from eight possible codes. If the base station does not respond to
the UpPTS, the UpPTS is repeated in the next frame.
Figure 2-3: Structure of UpPTS
13User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
The UpPTS is a complex-valued signal resulting from the real SYNC1 sequence by a
rotating-vector operation.
2.3.3 Structure of traffic burst
In time slots Ts0 to Ts6, bursts can be sent by the base station or the user equipment,
i.e. in both directions of transmission. The burst structure is identical for both directions. There are two types of burst, however, which are described in the following.
About the TD-SCDMA options
Modulation system
2.3.3.1
Figure 2-4: Burst without Layer 1 Control Information
Burst without layer 1 control information
This type of burst can be used for all physical channels. It comprises two data fields, a
midamble and a guard period.
Figure 2-5: Traffic burst without layer
1 control information
The useful data are
●
Alternately fed to the I and the Q path (QPSK data modulation),
●
Mapped from the 0/1 plane into the –1/+1 plane,
●
Spread with the complex spreading code (spreading factor SF = 1, 2, 4, 8 or 16),
●
Scrambled with the real-valued scrambling code,
●
Weighted with the channel power and
●
Filtered (root-raised cosine 0.22)
Since each user sends only one burst per frame, the following gross data rate is
obtained:
14User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
The midamble is obtained from the basic midamble by periodic repetition and shifting.
For some channels, the midamble shift can be set in steps of eight chips. The basic
midamble is 128 chips long, while the length for the midamble field in the time slot is
144 chips. Each scrambling code (setting parameter at cell level) is assigned a basic
midamble code.
The midamble is not spread or scrambled.
No signal is transmitted during the guard period. This avoids crosstalk of the burst into
the next time slot at the receiver end.
2.3.3.2 Burst with layer 1 control information
This type of burst can be used only with DPCHs (dedicated physical channels). It differs from the "normal" burst only in that the data fields are shortened ahead of and
after the midamble to enable the transmission of layer 1 control information.
About the TD-SCDMA options
Modulation system
Figure 2-6: Traffic burst with layer 1 control information
The burst consists of two fields of data symbols, a fixed-length 144 chip midamble, and
control fields for Synchronization Shift (SS), Transmit Power Control (TPC), and Transport Format Indicator (TFCI). The timeslot is delimited by a 16-chip guard period (GP).
Each data field consists of a maximum of 352 chips.
The Transport Format Indicator field (TFCI) conveys transport format information to the
receiver, which is used by the channel decoder to recover transport channels. The
information is distributed into two segments in one burst (four segments in two burst =
one frame)
The synchronization shift (SS) field is used to inform the other station of a shift of the
burst time ('"00" means that the sync shift is increased, "11" that it is decreased). The
bits are transmitted in M consecutive frames. The shift value is a multiple k of T
chip
/8. M
and k are transmitted by signaling. The value for M (Sync Shift Repetition) can be
selected.
Analogously to the Sync Shift field, the power control (TPC) field is used to initiate an
increase or decrease of transmit power.
15User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
If the spreading factor SF is lower than 16, the control symbols are transmitted 16/SF
times. Control symbols are treated like data symbols, i.e. they are spread and scrambled.
About the TD-SCDMA options
Modulation system
16User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
3 TD-SCDMA configuration and settings
► To access the TD-SCDMA settings, select "Baseband > TD-SCDMA".
The remote commands required to define these settings are described in Chapter 4,
"Remote-control commands", on page 91.
● General settings......................................................................................................18
● Trigger settings....................................................................................................... 20
● Marker settings........................................................................................................25
● Clock settings..........................................................................................................26
● Local and global connectors settings......................................................................28
● Common cell configuration settings........................................................................ 28
● Predefined settings................................................................................................. 31
● Cell configuration.................................................................................................... 32
● Enhanced channels settings................................................................................... 37
● HSDPA/HSUPA settings......................................................................................... 51
● Slot configuration.................................................................................................... 63
● DPCCH settings......................................................................................................72
● Slot mode PRACH settings.....................................................................................79
● Filter / clipping / ARB settings................................................................................. 84
● Power ramping........................................................................................................89
TD-SCDMA configuration and settings
Tip: The dialog is comprehensive. To simplify the description and the orientation
through this documentation, the headings of the following section follow a common
naming convention:
<DialogName/TabName>< - ><SourceDialog>
This common structure is intended to identify your current location in the dialog.
17User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
3.1 General settings
► To access this dialog, select "Baseband > TD-SCDMA > General".
TD-SCDMA configuration and settings
General settings
This dialog comprises the standard general settings, valid for the signal in both
transmission directions.
State
Activates the standard and deactivates all the other digital standards and digital modulation modes in the same path.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:STATe on page 98
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"
Link Direction Downlink/Forward
Filter Root Cosine
Clipping Off
Power ramping Cosine / 2 chips
Trigger Auto
Remote command:
[:SOURce<hw>]:BB:TDSCdma:PRESet on page 96
18User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
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 SMW user manual.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:SETTing:CATalog? on page 96
[:SOURce<hw>]:BB:TDSCdma:SETTing:LOAD on page 97
[:SOURce<hw>]:BB:TDSCdma:SETTing:STORe on page 97
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:TDSCdma:WAVeform:CREate on page 98
TD-SCDMA configuration and settings
General settings
TD-SCDMA Version
Displays the current version of the TD-SCDMA standard.
The default settings and parameters provided are oriented towards the specifications
of the version displayed.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:VERSion? on page 98
Chip Rate
Displays the system chip rate. This is fixed at 1.28 Mcps.
The output chip rate can be varied in the Filter/Clipping/ARB Settings dialog (see
Chapter 3.14.1, "Filter settings", on page 85).
Remote command:
[:SOURce<hw>]:BB:TDSCdma:CRATe? on page 93
Link Direction
Selects the transmission direction.
The settings of the basestation or the user equipment are provided in the following dialog section in accordance with the selection.
"Downlink/
Forward"
"Uplink/
Reverse"
Remote command:
[:SOURce<hw>]:BB:TDSCdma:LINK on page 94
The transmission direction selected is basestation to user equipment.
The signal corresponds to that of a base station.
The transmission direction selected is user equipment to base station. The signal corresponds to that of a user equipment.
19User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
Filter / Clipping / ARB Settings
Access to the dialog for setting baseband filtering, clipping and the sequence length of
the arbitrary waveform component, see Chapter 3.14, "Filter / clipping / ARB settings",
on page 84 .
Power Ramping…
Accesses the dialog for setting the power ramping, see Chapter 3.15, "Power ramp-
ing", on page 89.
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 and mode, 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 dialog together with information on the enabled trigger mode. As in the "Marker"
and "Clock" dialogs, this dialog provides also access to the settings of the related connectors.
TD-SCDMA configuration and settings
Trigger 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 SMW user manual.
► To access this dialog, select "Baseband > TD-SCDMA > Trigger In".
This dialog comprises the settings required for configuring the trigger signal.
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:
●
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.
20User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
Trigger Settings Common to All Basebands................................................................. 21
Trigger Mode.................................................................................................................21
Signal Duration Unit...................................................................................................... 22
Trigger Signal Duration................................................................................................. 22
Running/Stopped.......................................................................................................... 22
Arm................................................................................................................................22
Execute Trigger.............................................................................................................22
Trigger Source...............................................................................................................22
Sync. Output to External Trigger/Sync. Output to Trigger............................................. 23
External Trigger Inhibit.................................................................................................. 24
Trigger Delay.................................................................................................................24
Trigger Settings Common to All Basebands
To enable simultaneous signal generation in all basebands, the R&S SMW couples the
trigger settings in the available basebands in any instrument's configuration involving
signal routing with signal addition. For example, in MIMO configuration, routing and
summing of basebands or of streams.
The icon
You can access and configure the common trigger source and trigger mode settings in
any of the basebands. An arm or a restart trigger event applies to all basebands, too.
You can still apply different delay to each of the triggers individually.
TD-SCDMA configuration and settings
Trigger settings
indicates that common trigger settings are applied.
Trigger Mode
Selects trigger mode, i.e. determines the effect of a trigger event on the signal generation.
For more information, refer to chapter "Basics" in the R&S SMW user manual.
●
"Auto"
The signal is generated continuously.
●
"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:TDSCdma[:TRIGger]:SEQuence on page 106
21User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
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:TDSCdma:TRIGger:SLUNit on page 105
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:TDSCdma:TRIGger:SLENgth on page 105
Running/Stopped
With enabled modulation, displays the status of signal generation for all trigger modes.
●
●
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:RMODe? on page 104
TD-SCDMA 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 a subsequent trigger event occurs.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:ARM:EXECute on page 103
Execute Trigger
For internal trigger source, executes trigger manually.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:EXECute on page 103
Trigger Source
The following sources of the trigger signal are available:
●
"Internal"
The trigger event is executed manually by the "Execute Trigger".
●
"Internal (Baseband A/B)"
The trigger event is provided by the trigger signal from the other basebands.
If common trigger settings are applied, this trigger source is disabled.
●
"External Global Trigger"
The trigger event is the active edge of an external trigger signal provided and configured at the USER x connectors.
●
"External Local Trigger"
The trigger event is the active edge of an external trigger signal provided and configured at the local T/M/C connector.
22User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
●
●
"External Local Clock/Trigger" require R&S SMW-B10.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:SOURce on page 105
Sync. Output to External Trigger/Sync. Output to Trigger
Enables signal output synchronous to the trigger event.
●
TD-SCDMA configuration and settings
Trigger settings
With coupled trigger settings, the signal has to be provided at the T/M/C1/2/3 connectors.
"External Local Clock"
The trigger event is the active edge of an external local clock signal provided and
configured at the local T/M/C connector.
With coupled trigger settings, the signal has to be provided at the T/M/C1 connector.
"Baseband Sync In"
Option: R&S SMW-B9
In primary-secondary instrument mode, secondary instruments are triggered by the
active edge of the synchronization signal.
"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.
23User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
In primary-secondary instrument mode, this setting ensures that once achieved, synchronization is not lost if the baseband signal sampling rate changes.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:EXTernal:SYNChronize:OUTPut
on page 104
External Trigger Inhibit
Applies for external trigger signal or trigger signal from the other path.
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 SMW user manual.
TD-SCDMA configuration and settings
Trigger settings
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger[:EXTernal]:INHibit on page 106
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OBASeband:INHibit on page 104
Trigger Delay
Delays the trigger event of the signal from:
●
The external trigger source
●
The other path
●
The other basebands (internal trigger), if common trigger settings are used.
Use this setting to:
●
Synchronize the instrument with the device under test (DUT) or other external devices
●
Postpone the signal generation start in the basebands compared to each other
●
Compensate delays and align the signal generation start in multi-instrument setup
For more information, see chapter "Basics on ..." in the R&S SMW user manual.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger[:EXTernal]:DELay on page 106
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OBASeband:DELay on page 104
24User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
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 the 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 SMW user manual.
Access:
► Select "Baseband > TD-SCDMA > Marker".
TD-SCDMA configuration and settings
Marker settings
This dialog comprises the settings required for configuring the marker mode and
marker delay.
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:
●
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.
Marker Mode................................................................................................................. 25
Marker x Delay.............................................................................................................. 26
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.
25User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
TD-SCDMA configuration and settings
Clock settings
"Radio Frame"
"Chip Sequence Period (ARB)"
"System Frame Number (SFN) Restart"
"On/Off Ratio"
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OUTPut<ch>:ONTime on page 108
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OUTPut<ch>:OFFTime on page 108
"User Period"
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OUTPut<ch>:PERiod on page 108
A marker signal is generated every 10 ms (traffic channel frame
clock).
A marker signal is generated at the beginning of every arbitrary waveform sequence (depending on the set sequence length). The marker
signal is generated regardless of whether an ARB component is
used.
A marker signal is generated at the start of every SFN period (every
4096 frames).
A regular marker signal that is defined by an on/off ratio is generated.
A period lasts one on and off cycle.
A marker signal is generated at the beginning of every user-defined
period. The period is defined in "Period."
Remote command:
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OUTPut<ch>:ONTime on page 108
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OUTPut<ch>:OFFTime on page 108
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OUTPut<ch>:PERiod on page 108
[:SOURce<hw>]:BB:TDSCdma:TRIGger:OUTPut<ch>:MODE on page 107
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:TDSCdma:TRIGger:OUTPut<ch>:DELay on page 108
3.4 Clock settings
This dialog 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 SMW user manual.
26User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
► To access this dialog, select "Baseband > TD-SCDMA >Clock".
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:
●
●
TD-SCDMA configuration and settings
Clock settings
This dialog comprises the settings required for configuring the clock.
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.
Clock Source
Selects the clock source.
●
"Internal"
The instrument uses its internal clock reference.
●
"External Local Clock"
Option: R&S SMW-B10
The instrument expects an external clock reference at the local T/M/C connector.
"External Local Clock" requires R&S SMW-B10.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:CLOCk:SOURce on page 109
Clock Mode
Option: R&S SMW-B10
Sets the type of externally supplied clock.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:CLOCk:MODE on page 109
Measured External Clock
Provided for permanent monitoring of the enabled and externally supplied clock signal.
Remote command:
CLOCk:INPut:FREQuency?
27User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
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 Common cell configuration settings
► To access this dialog select "Baseband > TD-SCDMA > Cells".
TD-SCDMA configuration and settings
Common cell configuration settings
In this dialog, the cells can be set to the predefined settings, parameters of one cell
can be copied to another cell, and the total power can be set to 0 dB. Each cell can
be activated or deactivated. Active cells are highlighted in blue. Clicking a cell
opens the configuration dialog for setting the cell parameters.
Provided are the following settings:
Reset All Cells
Resets all cells to the predefined settings. The reset applies to the selected link direction. The following table gives an overview of the settings. The preset value for each
parameter is specified in the description of the remote-control commands.
Parameter Value
"Cell Configuration"
State Off
28User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
Parameter Value
(Use) Scrambling Code On
Scrambling Code (value) 0
SYNC-DL Code 0
SYNC-UL Code 0
Basic Midamble Code ID 0
Number of Users 16
Switching Point 3
DwPTS Power 0.0 dB
TD-SCDMA configuration and settings
Common cell configuration settings
"Slot Configuration"
State Off
Slot Mode (only in uplink) Dedicated
Channel Configuration
State Off
"Channel Type" Depending on channel number
Current User 1
Slot Format 0
Spreading Factor 16
Spreading Code 0
Power 0 dB
Data Source PRBS: PN9, Data Pattern: 0
Number of TFCI bits 0
TFCI Value 0
Number of Sync Shift & TPC bits 0 & 0
Sync Shift Pattern 1
Sync Shift Repetition M 1
TPC Source/TPC Pattern 01
Read Out Mode Continuous
Remote command:
[:SOURce<hw>]:BB:TDSCdma:RESet on page 96
Copy Cell...
Copies the settings of a cell to a second cell.
29User Manual 1175.6761.02 ─ 18
R&S®SMW-K50/-K51
"Copy From Source"
"To Destination"
"Accept"
Remote command:
[:SOURce<hw>]:BB:TDSCdma:COPY:SOURce on page 92
[:SOURce<hw>]:BB:TDSCdma:COPY:DESTination on page 92
[:SOURce<hw>]:BB:TDSCdma:COPY:EXECute on page 93
TD-SCDMA configuration and settings
Common cell configuration settings
Selects the cell whose settings are to be copied.
Selects the cell whose settings are to be overwritten.
Starts the copy process.
Predefined Settings
Access the dialog for setting predefined configurations, see Chapter 3.7, "Predefined
settings", on page 31 .
Remote command:
n.a.
Test Setups/Models
Accesses the dialog for selecting one of the test models defined in the TD-SCDMA
standard and the self-defined test setups.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:SETTing:TMODel on page 97
Adjust Total Power to 0dB
Sets the power of an enabled channel so that the total power of all the active channels
is 0 dB. This does not change the power ratio among the individual channels.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:POWer:ADJust on page 94
Total Power
Displays the total power of the active channels for the selected link direction.
The total power is calculated from the power ratio of the powered up code channels
with modulation on. If the value is not equal to 0 dB, the individual code channels are
internally adapted so that the "Total Power" for achieving the set output level is 0 dB.
The power ratios are retained.
Remote command:
[:SOURce<hw>]:BB:TDSCdma:POWer[:TOTal]? on page 94
30User Manual 1175.6761.02 ─ 18
Loading...