Rohde & Schwarz SMBVB-K54, SMBVB-K142, SMBVB-K86 User Manual

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Page 1

R&S®SMBVB-K54/-K86/-K142 IEEE 802.11a/b/g/n, IEEE 802.11ac, IEEE 802.11ax

User Manual

(;ÜàD2)

1178822002

User Manual

Version 01

Page 2

This document describes the following software options:

●

R&S®SMBVB-K54/-K86/-K142

1423.7824.02, 1423.7924.02, 1423.8114.02

This manual describes firmware version FW 4.30.060.xx and later of the R&S®SMBV100B.

Mühldorfstr. 15, 81671 München, Germany

Phone: +49 89 41 29 - 0

Fax: +49 89 41 29 12 164

Email: info@rohde-schwarz.com

Internet: www.rohde-schwarz.com

Subject to change – Data without tolerance limits is not binding.

R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.

Trade names are trademarks of the owners.

1178.8220.02 | Version 01 | R&S®SMBVB-K54/-K86/-K142

The following abbreviations are used throughout this manual: R&S®SMBV100B is abbreviated as R&S SMBVB, R&S®WinIQSIM2

is abbreviated as R&S WinIQSIM2; the license types 02/03/07/11/13/16/12 are abbreviated as xx.

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1 Preface.................................................................................................... 7

1.1 About This Manual........................................................................................................ 7

1.2 Documentation Overview............................................................................................. 7

1.2.1 Getting Started Manual................................................................................................... 8

1.2.2 User Manuals and Help...................................................................................................8

1.2.3 Service Manual............................................................................................................... 8

1.2.4 Instrument Security Procedures......................................................................................8

1.2.5 Basic Safety Instructions.................................................................................................8

1.2.6 Data Sheets and Brochures............................................................................................ 9

1.2.7 Release Notes and Open Source Acknowledgment (OSA)............................................ 9

1.2.8 Application Notes, Application Cards, White Papers, etc................................................9

Contents

2 Welcome to the IEEE 802.11 WLAN Digital Standard....................... 10

2.1 Accessing the IEEE 802.11 WLAN Dialog................................................................. 11

2.2 Scope............................................................................................................................11

2.3 Notes on Screenshots................................................................................................ 12

3 About IEEE 802.11 WLAN and Basics................................................13

3.1 Operation Modes.........................................................................................................14

3.2 Signal Generation....................................................................................................... 15

4 WLAN Configuration and Settings..................................................... 16

4.1 General Settings..........................................................................................................16

4.2 Transmit Antenna Setup.............................................................................................20

4.2.1 Antenna and Mapping Setting.......................................................................................20

4.2.2 Transmission Chain Matrix............................................................................................20

4.3 Trigger Settings...........................................................................................................21

4.4 Marker Settings........................................................................................................... 25

4.5 Clock Settings............................................................................................................. 27

4.6 Global Connector Settings.........................................................................................28

4.7 Frame Block Configuration........................................................................................ 29

4.8 PPDU Configuration....................................................................................................34

4.8.1 General Settings........................................................................................................... 35

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4.8.1.1 Stream Settings.............................................................................................................35

4.8.1.2 User Settings.................................................................................................................36

4.8.1.3 Modulation and Coding Scheme................................................................................... 37

4.8.1.4 PSDU Bit Rate (CCK/PBCC)........................................................................................ 39

4.8.2 HE Configuration Settings.............................................................................................40

4.8.2.1 HE General Configuration Settings .............................................................................. 40

4.8.2.2 Additional HE-SIG-A-Fields...........................................................................................43

4.8.2.3 Logging......................................................................................................................... 44

4.8.3 User Configuration........................................................................................................ 45

4.8.4 Data Settings.................................................................................................................48

4.8.4.1 Data Settings.................................................................................................................48

4.8.4.2 Header Settings............................................................................................................ 52

4.9 A-MPDU Settings.........................................................................................................53

Contents

4.10 MAC Header and FCS Configuration for Frame Block............................................ 55

4.10.1 MAC Header and FCS.................................................................................................. 55

4.10.2 802.11 MAC Frame Field.............................................................................................. 56

4.10.3 Beacon Settings............................................................................................................ 60

4.10.3.1 General Beacon Functions............................................................................................60

4.10.3.2 Capability Information Parameters................................................................................62

4.10.3.3 ERP Parameters........................................................................................................... 64

4.10.3.4 HT Capability Information..............................................................................................65

4.10.4 Trigger Frame Settings..................................................................................................66

4.10.4.1 Common Info Field........................................................................................................66

4.10.4.2 User Info Field...............................................................................................................69

4.11 MAC Header HT/HE and VHT Configuration.............................................................71

4.11.1 Common Settings..........................................................................................................72

4.11.2 MAC HT Configuration.................................................................................................. 72

4.11.3 MAC VHT Configuration................................................................................................75

4.11.4 MAC HE Configuration..................................................................................................78

4.12 Spatial Mapping...........................................................................................................79

4.13 Filter / Clipping Settings.............................................................................................82

4.13.1 Filter Settings................................................................................................................ 82

4.13.2 Clipping Settings........................................................................................................... 85

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5 How to Work with the IEEE 802.11 WLAN Option............................. 87

5.1 Generating a Realistic MxN MIMO WLAN 802.11n/ac/p Signal for Receiver Test

under Static Conditions..............................................................................................87

6 Remote-Control Commands............................................................... 89

6.1 Programming Examples............................................................................................. 90

6.1.1 Trigger Settings.............................................................................................................90

6.1.2 Marker Settings............................................................................................................. 91

6.1.3 Clock Settings............................................................................................................... 91

6.2 General Commands.................................................................................................... 92

6.3 Filter/Clipping Settings...............................................................................................96

6.4 Trigger Settings.........................................................................................................101

6.5 Marker Settings......................................................................................................... 106

6.6 Clock Settings............................................................................................................111

Contents

6.7 Antenna Configuration Settings.............................................................................. 111

6.8 Frame Block Configuration...................................................................................... 114

6.9 Frame Configuration Settings..................................................................................120

6.9.1 Frame Block PPDU Configuration ..............................................................................120

6.9.2 HE Configuration.........................................................................................................134

6.9.3 User Configuration...................................................................................................... 139

6.9.4 MPDU Configuration................................................................................................... 142

6.9.5 MAC Header Configuration......................................................................................... 144

6.9.5.1 Common Fields Commands .......................................................................................144

6.9.5.2 MAC Header HT Configuration................................................................................... 151

6.9.5.3 MAC Header VHT Configuration.................................................................................156

6.9.5.4 MAC Header HE Configuration................................................................................... 161

6.9.5.5 Trigger Frame Settings................................................................................................161

6.9.6 Beacon Configuration..................................................................................................163

6.9.6.1 General Beacon Functions..........................................................................................163

6.9.6.2 Capability Information Parameters..............................................................................165

6.9.6.3 ERP Parameters ........................................................................................................ 171

6.9.7 Spatial Mapping Configuration.................................................................................... 172

List of Commands..............................................................................175

Index....................................................................................................182

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Contents

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1 Preface

1.1 About This Manual

This user manual provides all the information specific to the digital standard IEEE 802.11.

The main focus of this manual is on the provided settings and the tasks required to generate a signal. The following topics are included:

●

Introduction to and getting familiar with the option

●

About the IEEE 802.11 and basics

Background information on basic terms and principles in the context of the signal generation

●

IEEE 802.11 configuration and settings

A concise description of all functions and settings available to configure signal generation with their corresponding remote control commands

●

Remote control commands

Remote commands required to configure and perform signal generation in a remote environment, sorted by tasks

●

List of remote commands

Alphabetical list of all remote commands described in the manual

●

Index

Preface

Documentation Overview

Contents and scope

This description assumes R&S SMBV100B equipped with all availabe options. Depending on your model and the installed options, some of the functions may not be available on your instrument.

Notes on screenshots

When describing the functions of the product, we use sample screenshots. These screenshots are meant to illustrate as much as possible of the provided functions and possible interdependencies between parameters. The shown values may not represent realistic 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.

1.2 Documentation Overview

This section provides an overview of the R&S SMBV100B user documentation. Unless specified otherwise, you find the documents on the R&S SMBV100B product page at:

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www.rohde-schwarz.com/manual/smbv100b

1.2.1 Getting Started Manual

Introduces the R&S SMBV100B 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.

1.2.2 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 SMBV100B is not included.

Preface

Documentation Overview

All user manuals are also available for download or for immediate display on the Internet.

1.2.3 Service Manual

Describes the performance test for checking the rated specifications, module replacement and repair, firmware update, troubleshooting and fault elimination, and contains mechanical drawings and spare part lists.

The service manual is available for registered users on the global Rohde & Schwarz information system (GLORIS, https://gloris.rohde-schwarz.com).

1.2.4 Instrument Security Procedures

Deals with security issues when working with the R&S SMBV100B in secure areas. It is available for download on the Internet.

1.2.5 Basic Safety Instructions

Contains safety instructions, operating conditions and further important information. The printed document is delivered with the instrument.

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1.2.6 Data Sheets and Brochures

The data sheet contains the technical specifications of the R&S SMBV100B. 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/smbv100b

1.2.7 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/smbv100b

Preface

Documentation Overview

1.2.8 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/smbv100b

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2 Welcome to the IEEE 802.11 WLAN Digital

Standard

The R&S SMBV100B-K54/-K86/-K142 are firmware applications that add functionality to generate signals in accordance with the wireless LAN standards IEEE 802.11a/b/g/n/ac/p/j/ax.

The option R&S SMBVB-K54 offers signal generation according to IEEE 802.11n, also legacy modes of IEEE 802.11a/b/g and IEEE 802.11p/j are supported. For IEEE 802.11ac signal generation option R&S SMBVB-K86 is required and for IEEE 802.11ax signal generation option R&S SMBVB-K142. At least one R&S SMBVB-K54 option must be installed on the respective instrument as a prerequisite.

The R&S SMBV100B supports all mandatory and almost all optional features of the IEEE 802.11 standard.

The following list gives an overview of the main features:

●

Support of up to eight Tx antennas

●

20 MHz and 40 MHz

●

80 MHz and 160 MHz bandwidth with option R&S SMBVB-K86/-K142

●

Support of all three operation modes (Legacy, Mixed Mode, Green Field)

●

Support of all legacy transmission modes (L-10 MHz, L-20 MHz, L-Duplicate, LUpper, L-Lower)

●

Support of all 11n transmission modes (HT-20 MHz, HT-40 MHz, HT-Duplicate, HTUpper, HT-Lower)

●

Support of all 11ac transmission modes with option R&S SMBVB-K86 (VHT-20 MHz, VHT-40 MHz, VHT-80 MHz, VHT-80+80 MHz, VHT-160 MHz)

●

Support of all 11ax transmission modes with option R&S SMBVB-K142 (HE-20 MHz, HE-40 MHz, HE-80 MHz, HE-80+80 MHz, HE-160 MHz)

●

Additional support of the CCK and PBCC frames in accordance with IEEE 820.11a/b/g standard

●

Support of Space Time Block Coding ( STBC) and Spatial Multiplexing

●

Up to 8 spatial streams in all supported channel widths

●

Multi-User MIMO available with 2 or more total spatial streams

●

Configurable number of spatial streams, space time streams and additional spatial streams, as well as configurable modulation per spatial stream

●

Support of short guard interval

●

Configurable state of the scramble, interleaver, time domain windowing and channel coding

●

Configurable PPDU, MAC header and FCS

●

Integrated frame block concept for the generation of sequence of cascaded frame blocks with different configurations and data rates

●

Support of simple diversity and MIMO tests (frequency flat MIMO channel simulation) without additional channel simulator

Welcome to the IEEE 802.11 WLAN Digital Standard

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●

Simulation of real-time MIMO channel condition for instruments equipped with the fading options R&S SMBVB-K74/-B14(x2)

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 SMBV100B user manual. The latest version is available at:

www.rohde-schwarz.com/manual/SMBV100B

Installation

You can find detailed installation instructions in the delivery of the option or in the R&S SMBV100B service manual.

2.1 Accessing the IEEE 802.11 WLAN Dialog

Welcome to the IEEE 802.11 WLAN Digital Standard

Scope

To open the dialog with IEEE 802.11 WLAN settings

► In the block diagram of the R&S SMBV100B, select "Baseband > IEEE 802.11".

A dialog box opens that displays the provided general settings.

The signal generation is not started immediately. To start signal generation with the default settings, select "State > On".

2.2 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:

●

Managing settings and data lists, like storing 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 SMBV100B user manual.

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2.3 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.

Welcome to the IEEE 802.11 WLAN Digital Standard

Notes on Screenshots

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3 About IEEE 802.11 WLAN and Basics

IEEE 802.11n is the extension of the WLAN IEEE 802.11a/g standard to nominal peak data rates of 600 Mbps. Like IEEE 802.11a/g, IEEE 802.11n is also based on OFDM. Additionally, IEEE 802.11n uses MIMO technology, up to 40 MHz bandwidth and special coding for increased throughput. The extension towards higher data rates is also known as high throughput mode (HT mode) of 802.11n, whereas the non-HT mode can be seen as the part of 802.11n, which is backwards compatible to 802.11a/g.

IEEE 802.11p is another extension to the WLAN IEEE 802.11a/g standard for the usage of wireless access in vehicular environment, e.g. Car-to-Car (C2C)/ VehicletoVehicle (V2V), intelligent transport systems(ITS).

IEEE 802.11ac further extends 802.11n to nominal peak data rates of 6240.0 Mbps. Like IEEE 802.11a/g/n, IEEE 802.11ac is also based on OFDM. Additionally, IEE

802.11ac uses MIMO technology, up to 160 MHz bandwidth and special coding for increased throughput. The extension towards higher data rates is also known as very high throughput (VHT) mode of 802.11ac.

About IEEE 802.11 WLAN and Basics

IEEE 802.11ax is aimed to improve the user experience and network performance in dense deployments in the 2.4 and 5 GHz band. It support uplink and downlink multi user MIMO and up to 160 MHz bandwidth. It is based on OFDM and OFDMA modulation.

A short comparison between the IEEE 802.11 standards is provided in Table 3-1.

Table 3-1: Overview Comparison of 11n, 11ac, and 11ax

Channel Bandwidth (MHz)

Subcarrier Spacing (KHz)

Symbol Time (us) 3.2 3.2 12.8

Cyclic Prefix (us) 0.8 0.8, 0.4 0.8, 1.6, 3.2

MU-MIMO No Downlink Uplink and Downlink

Modulation OFDM OFDM OFDM, OFDMA

Data Subcarrier Modulation

Coding BCC (Mandatory)

802.11n 802.11ac 802.11ax

20, 40 20, 40, 80, 80+80, 160 20, 40, 80, 80+80, 160

312.5 312.5 78.125

BPSK, QPSK, 16-QAM, 64-QAM

LDPC (Optional)

BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM

BCC (Mandatory)

LDPC (Optional)

BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024- QAM

BCC (Mandatory)

LDPC (Mandatory)

this table is taken from the white paper 1MA222: IEEE 802.11ax Technology Introduc-

tion.

The following application notes also contain information about the different IEEE

802.11 standards.There are available for free downolad on the Rohde & Schwarz website.

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●

1GP94: Generating Signals for WLAN 802.11ac

●

1MA152: Intelligent Transportation Systems Using IEEE 802.11p

●

1MA179: WLAN 802.11n: From SISO to MIMO

●

1MA192: 802.11ac Technology Introduction

●

1MA222: IEEE 802.11ax Technology Introduction

3.1 Operation Modes

The IEEE 802.11n standard defined the following three operation modes:

●

Legacy mode This mode is provided for backwards compatibility with the IEEE 802. a/g standard. The mode is also known as Non-HT mode.

●

Mixed Mode A legacy preamble and header (L-STF, L-LTF and L-SIG) are wrapping the HT part of the frame so that the frame is complying with OFDM-PHY and ERP-OFDM-PHY corresponding to 802.11 a/g respectively.

●

Green Field In this mode, frames are being transmitted in a new high throughput format that does not comply with the legacy mode. Green Field is an optional mode.

About IEEE 802.11 WLAN and Basics

Operation Modes

The Figure 3-1 shows the packet formats of the different operation modes that can be triggered by a device supporting the IEEE 802.11n standard.

Figure 3-1: PLCP packet format for IEEE 802.11

The Table 3-2 gives an overview of the frequency domain operation modes of the physical layer. Note that the duplicate mode corresponds to repeating the same complex numbers modulating the subcarriers of the upper channel on the lower channel.

Table 3-2: Frequency domain PHY operation

LM Legacy mode as in IEEE 802.11a/g

Also, the CCK and the PBCC frames as in IEEE 802.11b/g

HT-Mode Frequency: 20 MHz and 40 MHz, 1...4 spatial streams (HT Duplicate Mode

included)

Duplicate Non-HT mode IEEE 802.11a OFDM-PHY format, 20 MHz and 40 MHz dual operation, upper

channel rotated by 90˚ relative to lower channel

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Upper mode Non-HT/HT frame in the upper 20 MHz channel

Lower mode Non-HT/HT frame in the lower 20 MHz channel

VHT-Mode Frequency 20 MHz, 40 MHz, 80 MHz, 160 MHz, 1...8 spatial streams (option

HE mode Frequency 20 MHz, 40 MHz, 80 MHz, 160 MHz, 1...8 spatial streams (option

When operating in the OFDM 20 MHz mode, there are 64 subcarriers available; the migration to 40 MHz mode offers 128 subcarriers with the same frequency spacing of

312.5 KHz. 80 MHz bandwidth is using 256 subcarriers, keeping the original frequency spacing. With 160 MHz bandwidth 512 subcarriers apply.

For IEEE 802.11ax in the OFDMA frequency allocation, the resource units (RU) may contain 26, 52, 106, 242, 484 or 996 tones (aka subcarriers) and are in fixed locations. The tones/subcarriers in the resource units are adjacent and contiguous except in the middle of the channel where DC null carriers are present.

About IEEE 802.11 WLAN and Basics

Signal Generation

R&S SMBVB-K86 required)

R&S SMBVB-K142 required)

3.2 Signal Generation

The generation of an IEEE 802.11n/ac/ax signal is done in multiple steps. In high throughput (HT) and very high throughput (VHT) modes, the data of a single user is specially coded and transmitted via up to eight Tx antennas.

In this implementation, the mapping of the Tx antennas' signals to the output paths of the instrument can be configured. This function can be used for the simulation of frequency flat MIMO channel, i.e. one carrier analysis like BER tests for instance. Another application of the configurable mapping is the possibility to generate a combined signal from different antennas if there is one path instrument or limited number of baseband paths.

Refer to Figure 3-2 for an overview of the signal flow for generation of such a signal in HT mode.

Figure 3-2: IEEE 802.11 n/ac/ax transmission chain

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4 WLAN Configuration and Settings

► To access the IEEE 802.11 WLAN settings, select "Baseband > IEEE 802.11

WLAN".

The remote commands required to define these settings are described in Chapter 6,

"Remote-Control Commands", on page 89.

● General Settings..................................................................................................... 16

● Transmit Antenna Setup......................................................................................... 20

● Trigger Settings.......................................................................................................21

● Marker Settings.......................................................................................................25

● Clock Settings......................................................................................................... 27

● Global Connector Settings...................................................................................... 28

● Frame Block Configuration......................................................................................29

● PPDU Configuration................................................................................................34

● A-MPDU Settings....................................................................................................53

● MAC Header and FCS Configuration for Frame Block........................................... 55

● MAC Header HT/HE and VHT Configuration..........................................................71

● Spatial Mapping...................................................................................................... 79

● Filter / Clipping Settings.......................................................................................... 82

WLAN Configuration and Settings

General Settings

4.1 General Settings

This dialog provides access to the default and the "Save/Recall" settings, and displays the sample rate.

► To access this dialog select "Baseband > IEEE 802.11 WLAN > General".

This tab comprises the standard general settings.

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State

Activates the standard and deactivates all the other digital standards and digital modulation modes in the same path.

Remote command:

[:SOURce<hw>]:BB:WLNN:STATe on page 95

Set to Default

Calls the default settings. The values of the main parameters are listed in the following table.

Parameter Value

WLAN Configuration and Settings

General Settings

General parameters

"State" Not affected by "Set to Default"

"Transmission Bandwidth" 20 MHz

"Configure Baseband B from Baseband A" Off

"Tx Antennas" 1

"Filter" Cosine

"Clipping " Off

Frame blocks configuration

"Frame Blocks" 1

"Frame Block Type" DATA

"Frame Blocks State" On

"Physical Mode" Mixed mode

"Tx Mode" HT-20 MHz

"Frames" 1

"Idle Time" 0.1 ms

"Data Source" PN9

TX antenna setup

"Antennas" 1

"Mapping Coordinates" Cartesian

"Output" First set "Baseband", rest is set to Off

"Matrix Elements" ("Real", "Imaginary", "Magnitude", "Phase")

PPDU configuration

"Spatial Streams" 1

"Space Time Streams" 1

"Extended Spatial Streams" 0

"Space Time Block Coding" inactive

All zero but diagonal = 1

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Parameter Value

WLAN Configuration and Settings

General Settings

Parameter value

"MCS" 1

"Data Rate (Mbps)" 13

"Data Bits Per Symbol" 52

"Stream 1" QPSK

"Channel Coding" BCC

"Coding Rate" ½

"Guard" Long

"Data Length" 1024 bytes

"Number of Data Symbols" 158

"Scrambler" "ON (user init)"

"Scrambler Init" 01

"Interleaver Active" ON

"Service Field" 0000

"Time Domain Windowing Active" On

"Transition Time" 100 ns

"Preamble/Header Active" ON

"Smoothing" ON

Spatial mapping

"Mode" Spatial expansion

"Index k" 20

Remote command:

[:SOURce<hw>]:BB:WLNN:PRESet on page 94

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 filename and the directory, in which the settings are stored, are user-definable; the file extension is however predefined.

See also, chapter "File and Data Management" in the R&S SMBV100B user manual.

Remote command:

[:SOURce<hw>]:BB:WLNN:SETTing:CATalog? on page 94 [:SOURce<hw>]:BB:WLNN:SETTing:LOAD on page 95 [:SOURce<hw>]:BB:WLNN:SETTing:STORe on page 95 [:SOURce<hw>]:BB:WLNN:SETTing:DELete on page 94

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Generate Waveform File

With enabled signal generation, triggers the instrument to store the current settings as an ARB signal in a waveform file. Waveform files can be further processed by the ARB and/or as a multi-carrier or a multi-segment signal.

The filename and the directory it is stored in are user-definable; the predefined file extension for waveform files is *.wv.

Remote command:

[:SOURce<hw>]:BB:WLNN:WAVeform:CREate on page 96

Transmission Bandwidth

Selects the transmission bandwidth.

If the system bandwidth is set to 20 MHz, all invalid configurations in the frame blocks table are set to the default values.

Remote command:

[:SOURce<hw>]:BB:WLNN:BWidth on page 92

Sample Rate

Displays the sample rate of the signal specific for the selected bandwidth.

Remote command:

[:SOURce<hw>]:BB:WLNN:SRATe? on page 100

WLAN Configuration and Settings

General Settings

Transmit Antennas Setup

Accesses the dialog for configuring the TX antennas.

The menu is described in Chapter 4.2, "Transmit Antenna Setup", on page 20.

Remote command: n.a.

Filter / Clipping Settings

Accesses the dialog for setting baseband filtering and clipping, seeChapter 4.13, "Fil-

ter / Clipping Settings", on page 82.

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4.2 Transmit Antenna Setup

► To access this dialog select "Baseband > WLAN Standards > IEEE 802.11...> Gen-

eral > Transmit Antennas Setup".

WLAN Configuration and Settings

Transmit Antenna Setup

This dialog is used to map the generated Tx chains to different destinations ("Baseband A/B", "File" or "OFF") and makes it possible to combine different Tx antenna signals.

4.2.1 Antenna and Mapping Setting

Antennas

Selects the number of transmit antennas to be used.

Remote command:

[:SOURce<hw>]:BB:WLNN:ANTenna:MODE on page 111

Mapping Coordinates

Selects the coordinate system of the transmission chain matrix.

"Cartesian"

"Cylindrical"

Remote command:

[:SOURce<hw>]:BB:WLNN:ANTenna:SYSTem on page 112

Sets the Cartesian coordinates system ("Real", "Imaginary").

Sets the cylindrical coordinates system ("Magnitude", "Phase").

4.2.2 Transmission Chain Matrix

The transmission chain matrix can be used to adjust the channel coefficients.

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During signal calculation, the R&S SMBV100B evaluates the transmission matrix and takes the phase ratios set into account. However, the power ratio of the antennas is not considered. To generate a WLAN signal of antennas with different power level, set the power level of the corresponding path to the desired level in the header display of the instrument.

Output

Selects the destination of the calculated IQ chains.

"OFF"

"Baseband A/B"

"File"

Remote command:

[:SOURce<hw>]:BB:WLNN:ANTenna:TCHain<ch>:OUTPut:DESTination

on page 112

[:SOURce<hw>]:BB:WLNN:ANTenna:TCHain<ch>:OUTPut:FSELect

on page 112

WLAN Configuration and Settings

Trigger Settings

No mapping takes place.

The IQ chain is output to the selected baseband. Exactly one output stream can be mapped to a baseband.

The IQ chain is saved in a file.

Real/Magnitude

Enters the value of the real or the magnitude coordinates.

Remote command: For "Cartesian" mapping coordinates:

[:SOURce<hw>]:BB:WLNN:ANTenna:TCHain<ch>:TX<dir>:REAL on page 112

For "Cylindrical" mapping coordinates:

[:SOURce<hw>]:BB:WLNN:ANTenna:TCHain<ch>:TX<dir>:MAGNitude

on page 113

Imaginary/Phase

Enters the value of the imaginary or the phase coordinates.

Remote command: For Cartesian mapping coordinates:

[:SOURce<hw>]:BB:WLNN:ANTenna:TCHain<ch>:TX<dir>:IMAGinary

on page 113 For "Cylindrical" mapping coordinates:

[:SOURce<hw>]:BB:WLNN:ANTenna:TCHain<ch>:TX<dir>:PHASe on page 113

4.3 Trigger Settings

This tab provides access to the settings necessary to select and configure the trigger and 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.

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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 SMBV100B user manual.

► To access this dialog, select "Baseband > IEEE 802.11 WLAN > 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 connectors.

Use the Global Connector 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 Connector Settings.

WLAN Configuration and Settings

Trigger Settings

Trigger Mode

Selects trigger mode, i.e. determines the effect of a trigger event on the signal generation.

●

"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 with 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 with 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.

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Remote command:

[:SOURce<hw>]:BB:WLNN[:TRIGger]:SEQuence on page 105

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:WLNN:TRIGger:SLUNit on page 104

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:WLNN:TRIGger:SLENgth on page 103

Running/Stopped

With enabled modulation, displays the status of signal generation for all trigger modes.

●

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

●

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

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:RMODe? on page 103

WLAN Configuration and Settings

Trigger Settings

Arm

Stops the signal generation until subsequent trigger event occurs.

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:ARM:EXECute on page 102

Execute Trigger

For internal trigger source, executes trigger manually.

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:EXECute on page 102

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 master-slave mode, slave instruments are triggered by the active edge of the synchronization signal.

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Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:SOURce on page 104

Sync. Output to External Trigger/Sync. Output to Trigger

Enables signal output synchronous to the trigger event.

●

"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.

WLAN Configuration and Settings

Trigger Settings

●

"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.

In master-slave mode, this setting ensures that once achieved, synchronization is not lost if the baseband signal sampling rate changes.

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:EXTernal:SYNChronize:OUTPut

on page 103

External Trigger Inhibit

Applies for external trigger signal.

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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 SMBV100B user manual.

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger[:EXTernal]:INHibit on page 105

Trigger Delay

Delays the trigger event of the signal from:

●

The external trigger source

Use this setting to:

●

Synchronize the instrument with the device under test (DUT) or other external devices

●

Compensate delays and align the signal generation start in multi-instrument setup

For more information, see chapter "Basics on ..." in the R&S SMBV100B user manual.

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger[:EXTernal]:DELay on page 105

WLAN Configuration and Settings

Marker Settings

4.4 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 SMBV100B user manual.

Access:

► Select "Baseband > IEEE 802.11 WLAN > Marker".

This dialog comprises the settings required for configuring the marker mode and the marker delay.

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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 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 Global Connector Settings.

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; the settings are self-explanatory.

"Restart"

"Frame Block"

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:FBINdex on page 108

WLAN Configuration and Settings

Marker Settings

A marker signal is generated at the start of each signal sequence (period = all frame blocks).

"Number of Frame Blocks" = 1, that is, a marker signal is generated at the start of each frame block. Otherwise a specific frame block index is given and the whole frame block is marked.

"Frame"

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:FINDex on page 108

"Frame Active Part / Frame Inactive Part"

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:FESHift on page 109 [:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:RESHift on page 109

"Number of Frame Blocks" = 1, that is, a marker signal is generated at the start of each frame in the single frame block. Otherwise, the frame block and frame index are entered and the specific frame is masked.

A marker signal is generated to mark every active part of each frame. The active data transfer part (PPDU) of a frame period is marked with high, the inactive part (idle time) with low. This marker can be used to decrease the carrier leakage during inactive signal parts by feeding it into the pulse modulator. Otherwise, the frame block and frame index are entered and the active part of the specific frame is masked. The parameters "Rising Edge Shift / Falling Edge Shift" open when "Frame Active Part" or "Frame Inactive Part" is selected. They shift the rising/falling edge of the marker the specified number of samples. Negative values result in a shift back of the marker edge.

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WLAN Configuration and Settings

Clock Settings

"Pulse"

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:PULSe:DIVider on page 109 [:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:PULSe:FREQuency?

on page 110

"Pattern"

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:PATTern on page 109

"ON/OFF Ratio"

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:ONTime on page 108 [:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:OFFTime on page 108

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

A marker signal that is defined by a bit pattern is generated. The pattern has a maximum length of 32 bits.

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

Remote command:

[:SOURce<hw>]:BB:WLNN:TRIGger:OUTPut<ch>:MODE on page 106

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:WLNN:TRIGger:OUTPut<ch>:DELay on page 110

4.5 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 SMBV100B user manual.

► To access this dialog, select "Baseband > IEEE 802.11 WLAN > Clock".

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This dialog comprises the settings required for configuring the clock signal.

Defining the Clock

The provided clock signals are not dedicated to a particular connector. They can be mapped to one or more User x connectors.

Use the Global Connector 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, that is select the "Clock > Source".

●

Define the connector where the selected signal is provided. Use the Global Connector Settings.

WLAN Configuration and Settings

Global Connector Settings

Clock Source

Selects the clock source.

●

"Internal" The instrument uses its internal clock reference.

Remote command:

[:SOURce<hw>]:BB:WLNN:CLOCk:SOURce on page 111

4.6 Global Connector Settings

Each of the "Trigger In", "Marker" and "Clock" dialogs as well as the "Trigger Marker Clock" dialog provides a quick access to the related connector settings.

For more information, refer to the description R&S SMBV100B user manual, section "Global Connector Settings".

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4.7 Frame Block Configuration

► To access this dialog select "Baseband > IEEE 802.11 WLAN > Frame Blocks".

WLAN Configuration and Settings

Frame Block Configuration

This tab comprises the settings to select and configure a frame block.

Standard

Selects the IEEE 802.11 WLAN standard. After you have set your standard only the settings for this standard relevant "Type", "Physical Mode" and "Tx Mode" are available, see Table 4-1.

Table 4-1: Availability "Standard", "Type", "Physical Mode", "TxMode"

Standard Type Physical mode Txmode

User all all all

11a/g Data/ Beacon/ Trigger Legacy L-20MHz

11b/g Data/ Beacon/ Trigger Legacy CCK

11p/j Data/ Beacon/ Trigger Legacy L-10MHz

11n Data/ Sounding/Beacon/

Trigger

Mixed Mode/ Green Field

L-Duplicate

L-Upper

L-Lower

PBCC

HT-20MHz

HT-40MHz

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WLAN Configuration and Settings

Frame Block Configuration

11ac Data/ Sounding/ Beacon/

Trigger

11ax Data/ Trigger Mixed Mode HE-20MHz

Mixed Mode VHT-20MHz

HT-Duplicate

HT-Upper

HT-Lower

VHT-40MHz

VHT-80MHz

VHT-80 + 80 MHz

VHT-160MHz

HE-40MHz

HE-80MHz

HE-80 + 80MHz

HE-160MHz

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:STANdard on page 117

Type

Selects the PPDU type.

"Data"

"Sounding"

Only "Data Long Training" fields are used to probe the channel.

Staggered preambles are used to probe additional dimension of the MIMO channel. "Type > Sounding" is not available for "Physical Mode > Legacy".

"Beacon"

A frame of type "Beacon" contains all the information about a network, for example the beacon interval, capability information and the IBSS parameter set. The access point (AP) of a service set periodically transmits the beacon frame to establish and maintain the network.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:TYPE on page 119

Physical Mode

Selects the preamble design.

For "Physical Mode > Legacy", only "Type > Data" is available.

From 80 MHz transmission bandwidth in the frame block "Type > Data" you can only operate in "Physical Mode > Mixed Mode".

Note: "Physical Mode > Mixed Mode" transmissions can be detected by a physical layer transceiver of 802.11a/g OFDM, MAC FCS would however fail.

"Legacy"

Compatible with 802.11a/g OFDM devices. Also, CCK/PBCC frames as defined in IEEE 802.11b/g are supported. This mode applies to "Cylindrical" mapping coordinates.

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WLAN Configuration and Settings

Frame Block Configuration

"Mixed Mode"

For High Throughput (HT), Very High Throughput (VHT) , High Efficiency (HE) and 802.11a/g OFDM devices.

"Green Field"

For HT networks only.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PMODe on page 117

Tx Mode

Sets the Tx mode.

The available Tx modes depend on the physical mode (see table below).

Type Physical

mode

Data/ Trigger Legacy L-10MHz X X X X

Tx mode Transmission bandwidth

20 MHz 40 MHz 80 MHz 160 MHz

L-20MHz X X X X

L-Duplicate - X X X

L-Upper - X X X

L-Lower - X X X

CCK X X X X

PBCC X X X X

Data/ Trigger Mixed Mode HT-20MHz X X X X

HT-40MHz - X X X

HT-Duplicate - X X X

HT-Upper - X X X

HT-Lower - X X X

VHT-20MHz X X X X

VHT-40MHz - X X X

VHT-80MHz - - X X

VHT-80+80MHz - - X X

VHT-160MHz - - - X

HE-20MHz x x x x

HE-40MHz - x x x

HE-80MHz - - x x

HE-80 + 80MHz - - x x

HE-160MHz - - - x

Data Green Field HT-20MHz X X X X

HT-40MHz - X X X

HT-Duplicate - X X X

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WLAN Configuration and Settings

Frame Block Configuration

Type Physical

mode

Sounding Mixed Mode HT-20MHz X X X X

Sounding Green Field HT-20MHz X X X X

Tx mode Transmission bandwidth

20 MHz 40 MHz 80 MHz 160 MHz

HT-Upper - X X X

HT-Lower - X X X

HT-40MHz - X X X

HT-Duplicate - X X X

HT-Upper - X X X

HT-Lower - X X X

VHT-20MHz X X X X

VHT-40MHz - X X X

VHT-80MHz - - X X

VHT-80+80MHz - - X X

VHT-160MHz - - - X

HT-40MHz - X X X

HT-Duplicate - X X X

HT-Upper - X X X

HT-Lower - X X X

Beacon Legacy L-10MHz X X X X

L-20MHz X X X X

L-Duplicate - X X X

L-Upper - X X X

L-Lower - X X X

CCK X X X X

PBCC X X X X

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:TMODe on page 118

Frames

Sets the number of frames to be transmitted in the current frame block.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:FCOunt on page 115

Idle Time / ms

Sets the time interval separating two frames in this frame block.

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:ITIMe on page 117

Data

Selects the data source.

For "Std > 11ax", only the "A-MPDU" data source is available.

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.

4.8 PPDU Configuration

Access:

► Select "Frame Blocks > PPDU > Config...".

In this dialog, the mode, the time shifts and the transmit parameters can be configured.

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The parameters available for configuration depend on the selected "Type", "Physical Layer" and "Tx Mode".

4.8.1 General Settings

This dialog comprises the settings for the configuration of the stream settings, the modulation and coding scheme and the PSDU bit rate. The parameters available for configuration depend on the selected "Type", "Physical Layer" and "Tx Mode".

4.8.1.1 Stream Settings

1. To access this dialog select "Frame Blocks > PPDU > Config...".

2. Select "General > Stream Settings".

WLAN Configuration and Settings

PPDU Configuration

Provided are the following settings:

Spatial Streams

Enters the number of the spatial streams. For "Physical Mode > Legacy", only the value 1 is valid. For "Tx Mode > HT-Duplicate", only the value 1 is valid. In all other cases, the number of spatial streams depends on the number of antennas configured in the "TX Antenna Setup" window.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SSTReam on page 132

Space Time Streams

Enters the number of the space time streams. This value depends on the setting in the "Spatial Streams" field. Changing the number of the spatial streams immediately changes the value of the "Space Time Streams" to the same value.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:STSTream on page 133

Extended Spatial Streams

Enters the value of the extended spatial streams. This field is active for "Type > Sounding" only to probe additional dimensions of the channel.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:ESSTream on page 124

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Multi User MIMO

Activates multi user MIMO. This function applies to "Spatial Streams">1.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MUMimo:STATe on page 126

Segment

(available only for "Tx Mode > VHT-80+80 MHz")

In "Tx Mode > VHT-80+80 MHz", one of the two segments can be selected with transmission bandwidth 80 MHz or 160 MHz. Both segments can be only generated with bandwidth 160 MHz.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SEGMent on page 131

Space Time Block Coding

Displays the status of the space time block coding.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:STBC:STATe? on page 132

WLAN Configuration and Settings

PPDU Configuration

4.8.1.2 User Settings

To access this dialog:

1. In the "Frame Blocks" dialog, select "Std. > 11ac".

2. Open the "PPDU > Conf.." dialog.

3. Select "Spatial Streams " > 1.

4. Select "Multi User MIMO > ON".

This section contains the parameters for selecting and configuring signal generation of multiple users.

Provided are the following settings:

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User Index

Defines the currently generated user. For "Multi User MIMO > Active", only one user can be generated at a time. This parameter selects the generated one out of four available users.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:UINDex on page 134

Multi User MIMO Settings Table

Sets the user-defined parameters for all available users.

●

User index A maximum of four users are supported

●

N_STS Number of space time streams for each user

●

Group ID Group ID for each user

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MU<st0>:NSTS on page 126 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MU<st0>:GID on page 126

WLAN Configuration and Settings

PPDU Configuration

4.8.1.3 Modulation and Coding Scheme

1. To access this dialog select "Frame Blocks > PPDU > Config...".

2. Select "General > MCS Configuration".

Provided are the following settings:

MCS

Selects the modulation and coding scheme for all spatial streams.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MCS on page 125 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MCS on page 125

Data Rate/Mbps

Indicates the PPDU data rate.

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DATA:RATE? on page 116 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:DATA:RATE? on page 123

Data Bits Per Symbol

Displays the number of data bits sent by an OFDM symbol on all spatial streams.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DATA:BPSymbol? on page 122 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:DATA:BPSymbol?

on page 122

Stream n

Selects the modulation used for the selected spatial stream.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MODulation<st> on page 126 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MODulation<st>

on page 126

WLAN Configuration and Settings

PPDU Configuration

Channel Coding

Selects the channel coding.

"Off"

"BCC"

"LDPC"

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CODing:TYPE on page 122 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:CODing:TYPE

on page 122

Encoders

Displays the number of encoders to be used. This value depends on the data rate. For data rate ≤ 300 mps, this value is 1. Otherwise, the number of encoders is 2.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CODing:ENCoder? on page 121 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:CODing:ENCoder?

on page 121

Cod Rate

Selects the coding rate.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CODing:RATE on page 122 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:CODing:RATE

on page 122

No channel coding is used.

Binary convolution code

Low density parity check. This is an optional coding for the IEEE 802.11ac and IEEE 802.11n standards. Available only for "Tx Mode > HT.../VHT...".

Guard

Selects which guard interval is used for the OFDM guard.

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In "Physical Mode > Green Field /Legacy" only long guard intervals are possible. In this case, the field is read-only.

The values "0.8µs", "1.6 µs" and "3.2 µs" are available only for "Std.> 11ax".

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:GUARd on page 125

DCM

Available only for "MCS > 0/1/3/4"

Indicates the use of dual carrier modulation (DCM) for a HE data field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:DCM on page 122

4.8.1.4 PSDU Bit Rate (CCK/PBCC)

1. To access this dialog select "Frame Blocks > Physical Mode > Legacy ".

WLAN Configuration and Settings

PPDU Configuration

2. Select "TxMode > CCK / PBCC ".

3. Select "PPDU > Conf"...

In this dialog, the "PSDU Bit Rate (OFDM)" can be set.

Provided are the following settings:

PSDU Bit Rate

(available only for "Tx Mode > CCK/PBCC")

Selects the bit rate of the PSDU.

The data rates available are 1 Mbps, 2 Mbps, 5.5 Mbps, 11 Mbps and 22 Mbps. The 1 Mbps data rate is only available if the long PLCP format has been selected. The selection of the data rate also determines the possible modulation modes.

The following table shows the correlation between data rate and modulation.

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Data rate Possible modulation mode

1 Mbps Barker sequence (DBPSK)

2 Mbps Barker sequence (DQPSK)

5.5 Mbps CCK (DQPSK) or PBCC (BPSK)

11 Mbps CCK (DQPSK) or PBCC (QPSK)

22 Mbps PBCC (8PSK)

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PSDU:BRATe on page 129

PSDU Modulation

(available only for "Tx Mode > CCK/PBCC")

Indicates the modulation type.

The modulation type is determined by the selected PSDU "Bit Rate".

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PSDU:MODulation? on page 129

WLAN Configuration and Settings

PPDU Configuration

the information data sequence is spread with an 11-chip Barker sequence, chip rate is 11 Mcps

Barker Spreading

(available only for "Tx Mode > CCK/PBCC")

Activates/deactivates barker spreading (bit rates 1 Mbps or 2 Mbps only).

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PSDU:BSPReading:STATe on page 129

4.8.2 HE Configuration Settings

This chapter describes the HE configuration settings for 802.11ax.

4.8.2.1 HE General Configuration Settings

Contains the general HE configuration settings like "Link direction", "PPDU Format" and the settings for the "HE-SIG A fields".

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Select "Std > 11ax" or "Std > User".

3. Select "Tx Mode > HE-20/40/80/80+80/160MHZ "

4. Select "PPDU > Config".

5. Select "General > Additional HE-SIG-A".

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Link Direction

Selects the link direction.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:LINK on page 136

WLAN Configuration and Settings

PPDU Configuration

Guard

Selects which guard interval is used for the OFDM guard.

In "Physical Mode > Green Field /Legacy" only long guard intervals are possible. In this case, the field is read-only.

The values "0.8µs", "1.6 µs" and "3.2 µs" are available only for "Std.> 11ax".

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:GUARd on page 125

Max PE Duration

Selects the maximum packet extension (PE) duration.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAXPe on page 137

Time Domain Windowing Active

Activates/deactivates the time domain windowing.

Time domain windowing is a method to influence the spectral characteristics of the signal, which is not stipulated by the standard. However, it does not replace oversampling and subsequent signal filtering.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:TDWindowing:STATe on page 133

Beam change

(available only for "PPDU Format > HE SU/HE SU EXT")

If enabled, the beam is changed between pre-HE and HE modulated fields. The preHE fields are: L-STF, L-LTF, L-SIG, RL-SIG, HE-SIG-A, HE-SIG-A-R, and HE-SIG-B fields. The HE modulated fields are: HE-STF, HE-LTF and data fields.

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BCHG on page 134

PPDU Format

Selects the PPDU format.

"HE SU"

"HE MU"

"HE SU EXT"

"HE TRIG"

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PFORmat on page 137

WLAN Configuration and Settings

PPDU Configuration

HE SU (single-user) carries a single PSDU. The HE signal A (HESIG-A) field is not repeated.

HE MU (multi-user) carries multiple PSDUs to one or more users.

Carries a single PSDU. The HE-SIG-A field is repeated. This format is only transmitted in 20 MHz channel bandwidths. It is intended for a user that may be further away from the access point (AP).

Available only for "Link Direction > Uplink". Carries a single PSDU. It is sent as a response to a PPDU that contains a trigger frame.

HE-LTF Symb Duration

Selects the duration of the HE long training field (LTF).The symbol duration value does not include the guard interval. The values available are 3.2 μs (1x LTF), 6.4 μs (2x LTF), and 12.8 μs (4x LTF) LTF symbol durations.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SYMDuration on page 138

Cur PE Duration

Displays the current PE duration for all users. The possible values are 0 μs, 4 μs, 8 μs, 12 μs and 16 μs.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CURPe? on page 135

Right 106-Tone RU

Available only for "Tx Mode > HE-20MHz" and "PPDU Format > HE SU EXT".

If enabled, indicates that the right 106-tone RU is within the primary 20 MHz.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:RIGHt106tone on page 131

Transition Time

Sets the transition time when "Time Domain Windowing > Active".

The transition time defines the overlap range of two OFDM symbols. At a setting of 100 ns and if BW = 20 MHz, one sample overlaps.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:TTIMe on page 133

SIG-B DCM

Enables the use of dual carrier modulation (DCM) in a signal B field.

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BDCM on page 134

SIG-B MCS

Selects the modulation and coding scheme (MCS) for the signal B field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BMCS on page 135

4.8.2.2 Additional HE-SIG-A-Fields

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Select "Std > 11ax" or "Std > User".

3. Select "Tx Mode > HE-20/40/80/80+80/160MHZ "

4. Select "PPDU > Config".

WLAN Configuration and Settings

PPDU Configuration

5. Select "General > Additional HE-SIG-A".

The signal A field provides information about how to interpret the HE PPDUs. You can configure settings like the "BSS color" and "TXOP duration".

BSS Color

Sets the BSS color, an identifier of the basic service sets (BSS) field. This parameter helps to check if a detected frame is coming form an overlapping station.

If a listening wireless station detects an 802.11ax frame, it checks if the BSS color of the frame is the same as the color that was announced to it by the access point (AP) of the station. If the BSS colors of the frame and the station are the same, then the frame is treated as intra-BSS. If the BSS colors are different, then the wireless station considers the frame as inter-BSS.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BSSColor on page 135

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TXOP Duration

If transmission opportunity (TXOP) is set to 127, it indicates no duration information. If it is set to any other value, it indicates duration information for network allocation vector (NAV) parameter and that the TXOP is protected.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:TXOPduration on page 138

Spatial Reuse

Indicates if the spatial reuse is allowed (value set to 1) or not (value set to 0).

The spatial reuse is a method of the 802.11ax standard that aims to improve network performance in dense deployments.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SPAReuse<st> on page 138

Doppler

If enabled, the Doppler effect is used for the PPDU.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DOPPler on page 136

WLAN Configuration and Settings

PPDU Configuration

pre-FEC Padding Factor

Displays the pre forward error condition (FEC) padding factor used in the trigger PPDU.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PFPFactor? on page 138

PE Disambiguity

Displays the disambiguity in the number of sybmbols occuring due to the packet extension.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PED? on page 137

4.8.2.3 Logging

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Select "Std > 11ax" or "Std > User".

3. Select "Tx Mode > HE-20/40/80/80+80/160MHZ "

4. Select "PPDU > Config".

5. Select "General > Logging".

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This tab includes the setting for configuring a logging state.

Logging State

If enabled, the contents of HE-SIG-A and HE-SIG-B fields are written to the file specified in "Output File" in text form, when the 802.11 standard is turned on.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:LOGGing on page 136

WLAN Configuration and Settings

PPDU Configuration

Output File

Displays the fixed file path used for logging the contents of HE-SIG-A and HE-SIG-B fields.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:LOGFile? on page 136

4.8.3 User Configuration

This chapter describes the user configuration settings for 802.11ax. For more information on the settings, you can also refer to the white paper 1MA222: IEEE 802.11ax

Technology Introduction.

Since multiple users are intended recipients in the OFDMA downlink, the AP needs to tell the STAs which resource unit belong to them. In 802.11ax, the AP uses the HESIGB field in the HE_MU_PPDU to do this.

The SIG-B contains two fields:

●

Common field, where RU allocation info is included.

●

User-specific field, where per-STA info belongs.

In this dialog you can define the different setings of this fields.

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Select "Std > 11ax" or "Std > User".

3. Select "Type > Trigger"

4. Select "Tx Mode > HE-20/40/80/80+80/160MHZ "

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5. Select "PPDU > Config".

6. Select "User Configuration".

This comprises the HE general configuration settings.

1st/2nd Content Channel

Access: "Content Channel" tab.

WLAN Configuration and Settings

PPDU Configuration

Available only for "PPDU Format > HE MU/HE TRIG".

Defines the settings of the common field of the the HE-SIG-B field. For "Tx Mode > HE-20 MHz " only the 1st content channel is available.

RU Selection ← 1st/2nd Content Channel

Selects the RU allocation subfield of the HE-SIG-B common block field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CCH1:RUSelection<st> on page 139 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:CCH2:RUSelection<st> on page 139

Number of MU-MIMO users ← 1st/2nd Content Channel

Sets the number of MU-MIMO users. This value depends on the RU selection and the number of spatial streams. It configures the yyy/zzz value of the RU allocation subfield.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CCH1:MUNum<st> on page 140 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:CCH2:MUNum<st> on page 140

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Center 26-tone RU ← 1st/2nd Content Channel

Available only for "Tx Mode > HE-80MHz/HE-80+80MHz/HE-160MHz".

For full bandwidth 80 MHz: if enabled, indicates that center 26 -tone RU is allocated in the common block fields of both SIGB content channels with same value.

For full bandwidth 160/80+80 MHz: if enabled, indicates that center 26 -tone RU is allocated for one individual 80 MHz in common block fields of both SIGB content channels.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CENRu<st> on page 140

User Configuration

Access: "User Configuration" tab.

WLAN Configuration and Settings

PPDU Configuration

Defines the settings of the user-specific field of the the HE-SIG-B field.

STA Id ← User Configuration

Sets the station ID, the 11 least significant bits of the association identifier (AID).

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:STAid on page 141

Nsts ← User Configuration

Sets the number of space time streams allocated to a particular user.

If "Space time stream" is greater than 1 and "Number of MU-MIMO users" is also greater than 1, RUs of size 106 subcarriers or larger can accommodate more than one user. The "Nsts" setting allocates a portion of the available space time streams to a particular user.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:NSTS on page 141

RU Type ← User Configuration

Displays the resource unit type for each user.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:RUTYpe? on page 141

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MU MIMO ← User Configuration

Displays if the MU-MIMO is used for current user. All MU-MIMO users share the same RU, using different space time streams

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:MUMimo:STATe?

on page 140

Gain / dB ← User Configuration

Sets the additional gain that can be applied to the RU allocated by a particular user.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:GAIN on page 140

TxBF ← User Configuration

If enabled, indicates that the beamforming matrix is applied to the waveform.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:TXBF on page 142

PPDU ← User Configuration

Opens a dialog for configuring the PPDU.

WLAN Configuration and Settings

PPDU Configuration

State ← User Configuration

Sets the state of the respective user.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:USER<di>:STATe on page 141

4.8.4 Data Settings

The "Data" dialog comprises the settings for the configuration of the data and the header. The parameters available for configuration depend on the selected "Type", "Physical Layer" and "Tx Mode".

4.8.4.1 Data Settings

1. To access this dialog select "Frame Blocks > PPDU > Config...".

2. Select "Data > Data Settings".

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This dialog comprises the settings for the configuration of the data.

WLAN Configuration and Settings

PPDU Configuration

Data Length

Sets the size of the data field in bytes.

For "Data Length" = 0, no data field is generated for the case of a sounding frame.

The maximum data length depends on the physical mode:

●

In "Physical Mode > Legacy", the maximum value is 4061 bytes.

●

In "Physical Mode > Mixed Mode" and "Physical Mode > Green Field", the maximum value is 1048575 bytes.

The data length is related to the number of data symbols. Whenever the data length changes, the number of data symbols is updated and vice versa.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DATA:LENGth on page 123 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:DATA:LENGth

on page 123

Scrambler

Selects the different options for the scrambler.

"OFF"

"On (Random Init)"

The scrambler is deactivated.

(not available for "Tx Mode > CCK/PBCC" The scrambler is activated. The initialization value of the scrambler is selected at random. Each frame has a different random initialization value. This value is also different if there is successive recalculations with the same setting parameters so that different signals are generated for each calculation.

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WLAN Configuration and Settings

PPDU Configuration

"On (User Init)"

"ON"

"Preamble Only"

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SCRambler:MODE on page 130 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:SCRambler:MODE

on page 130

Ch. Bandwidth in Non HT

(available only for "Tx Mode > VHT")

This parameter is used to modify the first 7 bits of the scrambling sequence to indicate the duplicated bandwidth of the PPDU.

"NON_HT20 | 40 | 80 | 160"

"Not present"

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:CBINonht on page 121

(not available for "Tx Mode > CCK/PBCC") The scrambler is activated. The initialization value of the scrambler is set to a fixed value that is entered in the "Scrambler Init (hex)". This value is then identical in each generated frame.

(available only for "Tx Mode > CCK/PBCC") The scrambler is activated.

(available only for "Tx Mode > CCK/PBCC") The scrambler is activated. Only the preamble is scrambled.

Indicates 20 MHz, 40MHz, 80MHz or 160 (80+80) MHz channel bandwidth of the transmitted packet.

Channel bandwidth in non HT is not present.

Interleaver Active

Activates/deactivates the interleaver of the data field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:ILEaver:STATe on page 125 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:ILEaver:STATe

on page 125

Time Domain Windowing Active

Activates/deactivates the time domain windowing.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:TDWindowing:STATe on page 133

Number Of Data Symbols

Sets the number of data symbols per frame block.

If the number of OFDM data symbols is changed, the generator calculates the data field length as a function of the set PPDU bit rate. This value is displayed at "Data Length".

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DATA:SYMBols on page 123

Scrambler Init (hex)

Enters the initialization value for "Scrambler >User". This value is then identical in each generated frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SCRambler:PATTern on page 131 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:SCRambler:PATTern

on page 131

Dyn. Bandwidth in Non HT

(available only for "Tx Mode > VHT")

If present, this parameter is used to modify the first 7 bits of the scrambling sequence to indicate if the transmitter supports "Static" or "Dynamic" bandwidth operation.

"Not present"

"Static"

"Dynamic"

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DBINonht on page 124

WLAN Configuration and Settings

PPDU Configuration

Dynamic bandwidth in non HT is not present.

The transmitter supports static bandwidth operation.

The transmitter supports dynamic bandwidth operation.

Service Field (hex)

Enters the value of the service field. The standard specifies a default value of 0. Other values can be entered in hexadecimal form for test purposes or future extensions.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SERVice:PATTern on page 131 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:SERVice:PATTern

on page 131

Transition Time

Sets the transition time when "Time Domain Windowing > Active".

The transition time defines the overlap range of two OFDM symbols. At a setting of 100 ns and if BW = 20 MHz, one sample overlaps.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:TTIMe on page 133

Service Field Clock Bit

(available only for "Tx Mode > CCK/PBCC")

Sets the locked clock bit in service field of the PLCP header.

Via this flag (bit), the transmitter indicates whether transmission frequency and symbol rate have been derived from the same oscillator. If so (locked), the bit is set to 1, otherwise (not locked) to 0.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PLCP:LCBit:STATe on page 128

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PLCP P+H Format

(available only for "Tx Mode > CCK/PBCC")

Selects the packet type (PPDU format) with long or short PLCP (physical layer convergence protocol).

Depending on the selected format, the structure, modulation and data rate of the PLCP the preamble and the header are modified.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PLCP:FORMat on page 127

4.8.4.2 Header Settings

1. To access this dialog select "Frame Blocks > PPDU > Config...".

2. Select "Data > Header Settings".

WLAN Configuration and Settings

PPDU Configuration

This dialog comprises the settings for the configuration of the header.

Preamble/Header Active

Activates/deactivates the preamble and signal fields of the frames in the current frame block.

For "Type > Sounding", the preamble and signal field are always activated and cannot be deactivated.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PREamble:STATe on page 128

Smoothing

(available for all except "Tx Mode > VHT")

Indicates to the receiver whether frequency-domain smoothing is recommended as part of channel estimation.

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WLAN Configuration and Settings

A-MPDU Settings

"On"

"Off"

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SMOothing on page 132

Partial AID (hex)

(available only for "Tx Mode > VHT")

Provides an abbreviated indication of the intended recipient(s) of the frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PAID:PATTern on page 127

No TXOP PS

(available only for "Tx Mode > VHT")

Indicates whether the VHT access point (AP) allows VHT non-AP stations (STAs) in transmit opportunity (TXOP) power save mode to enter during TXOP.

"On"

"Off"

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:NTPS on page 127

Indicates that channel estimate smoothing is recommended.

Indicates that only per-carrier independent channel (unsmoothed) estimate is recommended.

Indicates that the VHT AP allows VHT non-AP STAs to enter doze mode during a TXOP.

Indicates that the VHT AP does not allow VHT non-AP STAs to enter doze mode during a TXOP.

4.9 A-MPDU Settings

This chapter describes the aggregate mac protocol data unit (A-MPDU) settings.

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Select "Type > Data".

3. Select "Data > A-MPDU".

4. Select "DList/Pattern > Config".

5. Select "A-MPDU".

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This dialog comprises the A-MPDU settings.

Number of MPDUs

Determines the number of MPDUs in the frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MPDU:COUNt on page 142 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MPDU:COUNt on page 142

A-MPDU Length

Indicates the overall A-MPDUs length, resulting from the "Data Length / bytes" settings of all MPDUs.

Remote command: n.a.

EOF

Selects the EOF value.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MPDU:EOF on page 144 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MPDU:EOF on page 144

WLAN Configuration and Settings

A-MPDU Settings

Data Length / bytes

Determines the size of the data field in bytes.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MPDU<st>:DATA:LENGth on page 143 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MPDU<st>:DATA:LENGth

on page 143

Data

Selects the data source.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MPDU<st>:DATA:SOURce on page 143 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MPDU<st>:DATA:SOURce

on page 143

DList / Pattern

Depending on the selected data source, selects a data list or allows entering a user defined bit pattern.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MPDU<st>:DATA:DSELection

on page 142

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MPDU<st>:DATA: DSELection on page 142 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MPDU<st>:DATA:PATTern on page 143 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MPDU<st>:DATA: PATTern on page 143

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4.10 MAC Header and FCS Configuration for Frame Block

In the real IEEE 802.11 system, a MAC (medium access control) header is transmitted in the PPDU before the actual data section. This header comprises the control information of the MAC layer. It is also possible to protect the PPDU by a frame checksum. These two functions can be controlled in the dialog.

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Select "PPDU > Config...".

3. Select "MAC Header & FCS".

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

This dialog comprises the "MAC Header" and "MAC Frame Control Field" settings.

4.10.1 MAC Header and FCS

MAC Header

Activates/deactivates the generation of the MAC header for the PPDU. If the MAC header is activated, all MAC header fields are enabled for operation.

The individual fields of the MAC header are described in the following.

All values of the MAC fields (except addresses) are entered in hexadecimal form with least significant bit (LSB) in right notation. In the data stream, the values are output standard-conformal with the LSB coming first.

Note: IEEE 802.11ac requires an A-MPDU frame aggregation. Therefore, when generating a IEEE 802.11ac signal you have to set "IEEE 802.11... > Frame Blocks> Data > A-MPDU".

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:STATe on page 151 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:STATe on page 151

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FCS (checksum)

Activates/deactivates the calculation of the FCS (frame check sequence). The standard defines a 32-bit (4-byte) checksum to protect the MAC header and the user data (frame body).

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCS:STATe on page 148 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCS:STATe

on page 148

4.10.2 802.11 MAC Frame Field

The MAC frame control field is used to define the protocol version, the frame type, sub type, and its function, etc.

Frame Control

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Enters the value of the frame control field.

The MAC frame control field has a length of 2 bytes (16 bits) and is used to define the protocol version, the frame type, sub type, and its function, etc. As an alternative, the individual bits can be set in the lower part of the graph.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:PVERsion on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:TYPE on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:SUBType on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:TDS on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:FDS on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:MFRagments

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:RETRy on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:PMANagement

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:MDATa on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:WEP on page 148 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:FCONtrol:ORDer on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol: PVERsion on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:TYPE

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:SUBType

on page 147

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[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:TDS

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:FDS

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol: MFRagments on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:RETRy

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol: PMANagement on page 147 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:MDATa

on page 147

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:WEP

on page 148

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:FCONtrol:ORDer

on page 147

Duration Id

Enters the value of the duration ID field.

Depending on the frame type, the 2-byte field Duration/ID is used to transmit the association identity of the station transmitting the frame or it indicates the duration assigned to the frame type.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:DID on page 146 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:DID on page 146

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

MAC Address

Enters the value of the address fields 1 ... 4.

The MAC header may contain up to four address fields, but not all of them must be available. Each of the 4 address fields can be activated or deactivated. The fields are used for transmitting the basic service set identifier, the destination address, the source address, the receiver address and the transmitter address. Each address is 6 bytes (48 bit) long. The addresses can be entered in hexadecimal form in the entry field of each address field. The LSB is in left notation.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:ADDRess<st>:STATe on page 146 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:ADDRess<st>: STATe on page 146

SA (hex)

(available only for "Physical Mode > Beacon")

Enters the value of the source address (SA) field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:SA on page 148

BSSID (hex)

(available only for "Physical Mode > Beacon")

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Enters the value of the basic service set identification (BSSID) field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:BSSid on page 146

Sequence Control

Activates/deactivates the sequence control field.

The sequence control field has a length of 2 bytes and is divided in two parts, the fragment number (4 bits) and the sequence number (12 bits) field. A long user data stream to be transmitted is first split up into MSDUs (MAC service data units) which can either be transmitted as PSDU frames or further divided into fragments. The sequence number and the fragment number are then used to number the individual subpackets of the user data stream to be transmitted. Thus, all PSDUs are assigned a consecutive number. This allows the receiver to arrange the data packets in the correct order, to determine whether an incorrectly transmitted packet was retransmitted and to find out whether packets are missing.

If the receiver can detect a packet without an error and does not request a retransmission, the sequence number is incremented by 1 for each packet (the field is reset to 0 at the latest after a count of 4095). The fragment number field is incremented by 1 when another fragment of the current MPDU is transmitted. The start count for the transmission (normally 0) and the number of packets required to increment the corresponding counter can be defined for both numbers. This is done with the parameters "Start Number" and "Incremented every ... packet(s)".

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

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Example:

An error-free transmission of 50 packets (no packet retransmission) is to be simulated. The sequence number should be incremented by 1 for each packet. Since no packet is fragmented, the fragment counter can always remain at 0. In this case the following values have to be set:

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

If it is to be simulated that some packets are received incorrectly or if the response of the receiver should be tested when the same packet arrives several times, the number of packets required to increment the sequence number can be set to 2, for example. Each packet will then automatically be sent twice (with identical data).

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:SCONtrol:STATe on page 150 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:SCONtrol:STATe

on page 150

Start Number ← Sequence Control

Sets the start number of the fragment bits or the sequence bits of the sequence control.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:SCONtrol:FRAGment:STARt

on page 149

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:SCONtrol:SEQuence:STARt

on page 150

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:SCONtrol: FRAGment:STARt on page 149 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:SCONtrol: SEQuence:STARt on page 150

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Increment Every ← Sequence Control

Defines the number of packets required to increment the counter of the fragment bits or the sequence bits of the sequence control.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:SCONtrol:FRAGment:INCRement

on page 149

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:SCONtrol:SEQuence:INCRement

on page 150

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:SCONtrol: FRAGment:INCRement on page 149 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:SCONtrol: SEQuence:INCRement on page 150

HT Config

Calls the menu for configuring the MAC high throughput (HT).

Note: Only the"Physical Modes > Mixed Mode " or "Physical Modes > Green Field " (QoS Data frames) provide the HT or VHT transmission technology. For "Physical Modes > Legacy ", this configuration field is not indicated.

The dialog is described in Chapter 4.11, "MAC Header HT/HE and VHT Configuration", on page 71.

Remote command: n.a.

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Frame Body

Indicates the length of the user data (frame body).

Remote command: n.a.

FCS

Indicates the length of the check sum.

Remote command: n.a.

4.10.3 Beacon Settings

A beacon frame is a management frame that contains all the information about a network. The beacon settings are used to define the timestamp, the beacon interval, the SSID, the supported rate etc.. They also comprise the capability information and the ERP parameters.

4.10.3.1 General Beacon Functions

1. To access this dialog select IEEE 802.11... > "Frame Blocks".

2. Select "Type > Beacon".

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3. Select "PPDU > Config...".

4. Select "MAC Header & FCS >Beacon General".

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Provided are the following settings:

Timestamp (hex)

Updates the local clock of a station (the timing synchronization function (TSF) of a frames' source) after receiving a beacon frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:TSTamp

on page 165

Beacon Interval

Defines the time interval between two beacon transmissions in ms.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:BINTerval

on page 164

SSID

Specifies the desired service set identifier (SSID) or the wildcard SSID. The maximal allowed length is 32 characters.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:SSID on page 165

SupportedRate

Contains the set of data rates that are supported by the AP, including indication which rates are part of the BSSBasicRateSet.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:SRATe on page 164

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DSSS(Current Channel)

Indicates the current channel of this direct sequence spread spectrum (DSSS) network.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:DCCHannel?

on page 164

IBSS(ATIM Window) (hex)

Contains the set of parameters necessary to support an independent basic service set (IBSS). The Information field contains the announcement traffic indication message (ATIM) Window parameter.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:IAWindow

on page 164

4.10.3.2 Capability Information Parameters

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

1. To access this dialog select IEEE 802.11... > "Frame Blocks".

2. Select "Type > Beacon".

3. Select "PPDU > Config...".

4. Select "MAC Header & FCS >Capability Info".

The capability parameters indicate if requested optional capabilities and services are allowed, supported or in use.

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For example if "DSSS-OFDM" is enabled the associated stations in the network is informed that use of direct sequence spread spectrum - OFDM modulation (DSSSOFDM) is allowed.

Capability Information Parameters

Table 4-2: Functions of capability information parameters

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Function name

"Immediate Block Ack"

"Delayed Block Ack"

"DSSSOFDM"

"Radio Measurement"

"APSD" Automatic power save delivery (APSD) is supported

If enabled this function indicates that: SCPI command

Immediate block Ack is allowed (suitable for highbandwidth, low latency traffic).

Delayed block Ack is allowed (delayed block Ack is suitable for applications that tolerate moderate latency).

Direct Sequence Spread Spectrum - OFDM is allowed (encodes packet data using the DSSS headers and OFDM encoding of the payload).

Radio measurement is supported (for example requests, performs and reports radio measurements in supported channels and provides information about neighbor APs).

(energy saving function).

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:IBACk

on page 167

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:DBACk

on page 168

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:DOFDm

on page 168

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:RMEasurement

on page 169

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:APSD on page 166

"Short Slot Time"

"QoS" Quality of service (QoS) is supported (takes care that

"Spectrum Mgmt"

"Channel Agility"

Short slot time is supported (reduces the slot time resulting in higher throughput (used at IEEE802.11g). The AP only uses short slot time when all clients support short slot time).

important applications always get enough bandwidth).

Spectrum management is enabled (the process of regulating the use of radio frequencies).

Channel agility is enabled (overcomes some inherent difficulty with a tone jammer).

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:SSTime

on page 170

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:QOS on page 169

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:SMGMt

on page 169

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:CAGility

on page 166

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WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Function name

"PBCC" Packet binary convolutional coding (PBCC) is

"Short Preamble"

"Privacy" Privacy mode is enabled (thus encryption is required

"CF-Poll Request"

"CF Pollable" The node is capable of using the point coordination

If enabled this function indicates that: SCPI command

allowed (a modulation mode for IEEE 802.11g).

Short preamble is allowed (uses 56 instead of 128 bits for the "sync" field. Created to improve WLAN efficiency).

for all data frames).

Contention-free poll is requested (indicates how the AP handles poll requests).

function (PCF), as opposed to the distributed coordination function (DCF). PCF is a method of coordinating wireless transmissions in which one station notifies other stations when they may broadcast.

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:PBCC on page 168

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:SPReamble

on page 170

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:PRIVacy

on page 168

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:CPRequest

on page 166

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:CPOLlable

on page 166

"IBSS" The network is an independent basic service set

(IBSS) type network. This is an operation mode of a WLAN. An IBSS doesn't need an AP. The wireless clients directly connect with each other. This mode is also named ad-hoc mode.

"ESS" The network is an extended service set (ESS) type

network (this is a set of connected BSSs. APs in an ESS are connected by a distribution system. Each ESS has an ID called the SSID which is a 32-byte (maximum) character string).

4.10.3.3 ERP Parameters

1. To access this dialog select IEEE 802.11... > "Frame Blocks".

2. Select "Type > Beacon".

3. Select "PPDU > Config...".

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:IBSS on page 167

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration: CAPability:ESS on page 167

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4. Select "MAC Header & FCS >ERP".

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

The extended rate PHY (ERP) parameters indicate special features/modes.

ERP Parameters

Function name

"Barker Preamble Mode"

"Use Protection"

"NonERP Present"

If enabled this function indicates that: SCPI command

Associated stations have to use the long preamble (in IEEE802.11g networks) . If all stations are capable of short preambles, Barker Preamble Mode should be disabled and all stations will use short preambles for efficiency.

A station not IEEE802.11g-capable (usually stations equipped with IEEE802.11b or IEEE802.11) is associated to the network and thus all stations have to enable use protection.

"Use Protection" may be activated when "NonERP Present" is activated.

A Non ERP station is present in the network. [:SOURce<hw>]:BB:WLNN:

4.10.3.4 HT Capability Information

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration:ERP: BPMode on page 171

[:SOURce<hw>]:BB:WLNN: FBLock<ch>: BFConfiguration:ERP: UPRotection on page 171

FBLock<ch>: BFConfiguration:ERP: NEPResent on page 171

1. To access this dialog select IEEE 802.11... > "Frame Blocks".

2. Select "Type > Beacon".

3. Select "PPDU > Config...".

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4. Select "MAC Header & FCS >HT Capability".

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Provided are the following settings:

State

Activates/ deactivates the HT capability information element.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:HTCapability: STATe on page 170

Green Field

If enabled this function indicates that the reception of PPDUs with HT Greenfield format is supported.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:BFConfiguration:HTCapability: GFIeld on page 170

4.10.4 Trigger Frame Settings

This dialog comprises the trigger frame settings, including the setup of the common info and user info fields.

4.10.4.1 Common Info Field

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Set "Type > Trigger"

3. Select "PPDU > Config...".

4. Select "MAC Header & FCS > Common Info ".

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This dialog comprises the trigger frame settings, including the setup of the common info and user info fields.

Includes the settings of the common info field.

Trigger Type

Specifies the type of trigger frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: TTYPe? on page 163

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Length

Specifies the value of the L-SIG length field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo:LEN

on page 162

Cascade Indication

If set to 1, then there is a subsequent trigger frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: CINDication on page 162

CS Required

If set to 1, the stations identified in the user field should sense the medium state and consider the nav in determining if to respond or not.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: CSRequired on page 162

Specifies the bandwidth. It can have the following values:

●

0: corresponds to a bandwidth of 20 MHz

●

1: corresponds to a bandwidth of 40 MHz

●

2: corresponds to a bandwidth of 80 MHz

●

3: corresponds to a bandwidth of 80+80 MHz or 160 MHz

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo:BW

on page 162

GI LTF

Specifies the GI and HE-LTF. It can have the following values:

●

0: corresponds to a value of 1xLTF + 1.6µs GI

●

1: corresponds to a value of 2xLTF + 0.8µs GI

●

2: corresponds to a value of 2xLTF + 1.6µs GI

●

3: corresponds to a value of 4xLTF + 3.2µs GI

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo:GILTf

on page 162

MU-MIMO LTF Mode

Specifies the LTF mode of the UL MU-MIMO.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: MLTFmode on page 162

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

Num HE-LTF Symbols

Specifies the number of HE-LTF symbols present.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: NHLSym on page 162

STBC

If set to 1, STBC encoding is used for the HE trigger-based PPDU response. Otherwise the value is set to 0.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo:STBC

on page 162

LDPC Ext Symb Seg

If set to 1, LDPC extra symbol is present. Otherwise the value is set to 0.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: LESSeg on page 162

AP Tx Power

Specifies the combined average power per 20 MHz bandwidth of all antennas that transmitted the trigger frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo:TXPow

on page 163

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Packet Extension

Specifies the packet extension duration.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: PEXTension on page 162

Spatial Reuse

Specifies the value of the spatial reuse of the HE trigger-based PPDU transmitted as a response to a trigger frame.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: SPAReuse on page 162

Doppler

Specifies a high doppler mode of transmission.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: DOPPler on page 162

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

HE-SIG-A Reserved

Specifies the value of the reserved bits in the HE-SIG-A.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:CINFo: HREServed on page 162

Trigger Dependent Common Info

The value of this field depends on the trigger variant. It is present for MU- BAR frame formats.

4.10.4.2 User Info Field

1. To access this dialog select "IEEE 802.11... > Frame Blocks".

2. Set "Type > Trigger"

3. Select "PPDU > Config...".

4. Select "MAC Header & FCS > User Info ".

This dialog comprises the trigger frame settings, including the setup of the common info and user info fields.

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Includes the settings of the user info field.

AID12

Carries the least significant 12 of the AID of the STA

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo:AID

on page 163

RU allocation

Specifies the RU used by the HE trigger-based PPDU of the STA, which is identified by the "AID12" field value.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo: RUALlocation on page 163

Coding Type

Specifies the code type. The value 0 indicates a BCC coding and 1 LDPC.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo: CODType on page 163

WLAN Configuration and Settings

MAC Header and FCS Configuration for Frame Block

MCS

Specifies the MCS.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo:MCS

on page 163

DCM

Specifies the dual carrier modulation. If the value is 0, then no DCM is used.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo:DCM

on page 163

SS Allocation

Specifies the spatial streams. This field contains 3 bits that specify the starting spatial stream and 3 bits that specify the number of spatial streams.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo: SSALlocation on page 163

Target RSSI

Specifies the target received signal power.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo:TRSSi

on page 163

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Rsv

Reserved bit.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo:RSV

on page 163

Trigger Dependent User Info

The value of this field depends on the trigger variant.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:TFConfig:UINFo: TDUSerinfo on page 163

4.11 MAC Header HT/HE and VHT Configuration

1. To access this dialog select "Frame Blocks > PPDU > Config...".

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

2. Select "MAC Header & FCS > HT Config" or "MAC Header & FCS > VHT Config"

In this dialog, the mode, the time shifts and the transmit parameters can be configured.

The "HT/VHT Control Field" may be included in any frame except a non-QoS Data frame. The presence of the HT/VHTcontrol field in frames carried in a HT/VHT PPDU is

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indicated by setting the order bit in the MAC header. The HT/VHT Control Field appears last in the MAC header, excluding any security fields.

4.11.1 Common Settings

Provided are the following settings for enabling the MAC HT/VHT Control Field:

QoS Control

Control field (2 Bytes) with an embedded checkbox for activating the control mechanism of Quality of Service (QoS) Data Frames.

The QoS solicits an acknowledgement policy from the receiver, according to specific feedback rules. QoS control ensures a high level of transmission performance like high bit rate, low latency or low bit error probability.

Information on contents of the QoS Control Data frame is for example duration request field, TXOP limit, and AP Buffer State or queue size.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:QSControl:STATe on page 149 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:QSControl on page 148 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:QSControl

on page 148

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:QSControl:STATe

on page 149

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

HT/VHT/HE Control

Enables HT/VHT/HE control and sets the HT/VHT/HE control field as hex value.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl on page 151 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl on page 156 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:STATe on page 155 [:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:HTControl:STATe

on page 155

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:HEControl

on page 161

4.11.2 MAC HT Configuration

The following functions describe the control field of the MAC HT configuration:

RDG/More PPDU

The RDG/More signal field (LSB, 1 bit) issues the reverse direction grant. When transmitted by an initiator or a responder, this field is interpreted differently.

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Transmitted by initiator

0 = No reverse grant.

1 = A reverse grant is present, as defined by the Duration/ID field.

Transmitted by responder

0 = The PPDU carrying the MPDU is the last transmission by the responder.

1 = The PPDU carrying the frame is followed by another PPDU.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:RDGMore on page 155

AC Constraint

Indicates the access point of the responder (1 bit).

0 = The response may contain data from any traffic identifier (TID)

1 = The response may contain data only from the same AC as the last data received

from the initiator.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:ACConstraint

on page 151

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

Reserved

This signal field (5 bit) is defined, but not used. It is set to zero by the transmitter and ignored by the receiver.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:REServed

on page 155

NDP Announcement

The NDP announcement (1 bit) indicates that a null data packet (NDP) will be transmitted after the frame.

0 = no NDP follows

1 = NDP follows

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:NDP on page 154 [:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:ZLF on page 156

CSI Steering

Sets the position of the CSI feedback (2 bit)

00 = CSI

01 = uncompressed steering matrix

10 = compressed steering matrix

11 = reserved

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:CSISteering

on page 153

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Reserved

This signal field (2 bit) is defined, but not used.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:SREServed

on page 155

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:FREQuest

on page 153

Calibration Sequence

Identifies the calibration sequence (2 bit). The field is included in each frame within the calibration procedure. Its value remains unchanged during one calibration procedure and is incremented each time a new calibration procedure starts.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:CALibration: SEQuence on page 152

Calibration Position

Sets the position in the Calibration Sounding Exchange sequence (2 bit):

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

00 = Not a calibration frame (Default setting)

01 = Calibration Start

10 = Sounding Response

11 = Sounding Complete

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:CALibration: POSition on page 152

Link Adaption Control

Sets the parameters of the link adaption control field. The following subfields enable configuring the response signal of the link adaption.

B0 (1bit) MA - MA payload

When the MA (Management Action) field is set to 1, the payload of the QoS Null Data MPDU (Medium Access Controller Protocol Data Unit) is interpreted as a payload of the management action frame.

B1 (1bit) TRQ - Sounding Request

1 = Request to the responder to transmit a sounding PPDU (Physical layer Protocol

Data Unit).

B2 (1bit) MRQ - MCS Request

1 = Request for feedback of MCS (Modulation Coding Scheme).

B3-B5 (3bit) MRS - MRQ Sequence Identifier

Set by sender to any value in the range '000'-'110' to identify MRQ. = Invalid if MRQ = 0

B6-B8 (3bit) MFS - MFB Sequence Identifier

Set to the received value of MRS. Set to '111' for unsolicited MFB.

B9-B15 (7bit) MFB - MCS Feedback

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Link adaptation feedback containing the recommended MCS. When a responder is unable to provide MCS feedback or the feedback is not available, the MFB is set to 'allones' (default value) and also MFS is set to '1'.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:LAControl

on page 154

HT/VHT

The subfield indicates the used format (HT or VHT).

0 = indicates use of the HT format.

1 = indicates use of the VHT format.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:HTControl:HVINdicator?

on page 153

4.11.3 MAC VHT Configuration

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

To access this dialog:

1. Set "Frame Blocks > Tx Mode" to

"VHT-20MHz","VHT-40MHz","VHT-80MHz","VHT-80 + 80MHz" or "VHT-160MHz".

2. Select "Frame Blocks >PPDU > Config..."

3. Select "MAC Header & FCS > VHT Config"

The following functions describe the control field of the MAC VHT configuration:

RDG/More PPDU

The RDG/More signal field (LSB, 1 bit) issues the reverse direction grant. When transmitted by an initiator or a responder, this field is interpreted differently.

Transmitted by initiator

0 = No reverse grant.

1 = A reverse grant is present, as defined by the Duration/ID field.

Transmitted by responder

0 = The PPDU carrying the MPDU is the last transmission by the responder.

1 = The PPDU carrying the frame is followed by another PPDU.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:RDGMore

on page 160

AC Constraint

Indicates the access point of the responder (1 bit).

0 = The response may contain data from any TID (Traffic Identifier)

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1 = The response may contain data only from the same AC as the last data received

from the initiator.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:ACConstraint

on page 157

Unsolicited MFB 0 = if the MFB is a response to an MRQ.

1 = if the MFB is not a response to an MRQ.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:UMFB on page 160

FB Tx Type 0 = If the Unsolicited MFB subfield is set to 1 and FB Tx Type subfield is set to 0, the

unsolicited MFB refers to either an unbeamformed VHT PPDU or transmit diversity using an STBC VHT PPDU.

1 = If the Unsolicited MFB subfield is set to 1 and the FB Tx Type subfield is set to 1, the unsolicited MFB refers to a beamformed SU-MIMO VHT PPDU.

Otherwise this subfield is reserved.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:FTTYpe on page 157

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

Coding Type

If the Unsolicited MFB subfield is set to 1, the Coding Type subfield contains the Coding information (set to 0 for BCC and set to 1 for LDPC) to which the unsolicited MFB refers.

0 = for BCC

1 = for LDPC

Otherwise this subfield is reserved.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:CTYPe on page 157

GID-H

If the Unsolicited MFB subfield is set to 1, the GID-H subfield contains the highest 3 bits of Group ID of the PPDU to which the unsolicited MFB refers.

Otherwise this subfield is reserved.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:GIDH on page 158

MFB

MFB subfield is interpreted as defined in Table 4-3. This subfield contains the recom- mended MFB. The value of MCS=15 and VHT N_STS=7 indicates that no feedback is present.

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Table 4-3: MFB subfield in the VHT format HT control field

Subfield Meaning Definition

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

VHT N_STS

MCS Recommended MCS

BW Bandwidth of the recom-

SNR Average SNR Indicates the average SNR, which is an SNR averaged over data

Recommended VHT

STS

feedback

mended MCS

Indicates the recommended VHT N VHT format of the HT Control field).

Indicates the recommended VHT MCS (Link adaption using the VHT format of the HT Control field).

MFB = 1

If the unsolicited MFB subfield is set to 1, the BW subfield contains the bandwidth of which the recommended MCS is intended for (Link adaption using the VHT format of the HT Control field). The BW subfield is set as follows:

●

0 for 20 MHz

●

1 for 40 MHz

●

2 for 80 MHz

●

3 for 160 MHz and 80+80 MHz

MFB = 1

If the Unsolicited MFB subfield is set to 0, the BW subfield is reserved and set to 0.

subcarriers and spatial streams (Link adaption using the VHT format of the HT Control field).

(Link adaption using the

STS

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:MFB on page 158

MFSI/GID-L MFB = 0

If the Unsolicited MFB subfield is set to 0, the MFSI/GID-L subfield contains the received value of MSI contained in the frame to which the MFB information refers.

MFB = 1

The MFSI/GID-L subfield contains the lowest 3 bits of Group ID of the PPDU to which the unsolicited MFB refers.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:MGL on page 159

MSI MRQ = 0

When the MRQ subfield is set to 0, the MSI subfield is reserved.

MRQ = 1

When the MRQ subfield is set to 1, the MSI subfield contains a sequence number in the range 0 to 6 that identifies the specific request.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:MSI on page 159

MRQ 0 = to request MCS feedback (solicited MFB).

1 = otherwise.

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:MRQ on page 159

Rsv

This signal field (1 bit) is defined, but not used. It is set to zero by the transmitter and ignored by the receiver.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:VREServed

on page 160

HT/VHT

The subfield indicates the used format (HT or VHT).

0 = indicates use of the HT format.

1 = indicates use of the VHT or HE format, depending on the value of the HE field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:HVINdicator?

on page 158

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:VHTControl: HVINdicator? on page 153

WLAN Configuration and Settings

MAC Header HT/HE and VHT Configuration

4.11.4 MAC HE Configuration

To access this dialog:

1. Set "Frame Blocks > Type > Data".

2. Set "Tx Mode" to "HE-20MHz","HE-40MHz","HE-80MHz","HE-80 + 80MHz" or

"HE-160MHz".

3. Select "Frame Blocks > PPDU > Config..."

4. Select "User Configuration > PPDU > Config..."

5. Select "MAC Header & FCS > HT Config"

The following functions describe the control field of the MAC HE configuration:

Aggregated control

Enters the value of the aggregated control (A-Control) field. This field consists of a sequence of one or more control subfields.

A control subfield consists of a 4-Bit control ID subfield and a control information of a variable size. The values are as defined in the 802.11ax amendment.

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Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:HEControl: ACONtrol on page 161

HE Indicates the use of the HE format, if "HT/VHT" is set to 1.

0 = indicates use of the VHT format.

1 = indicates use of the HE format.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:HEControl: HEINdicator? on page 161

HT/VHT

The subfield indicates the used format (HT or VHT).

0 = indicates use of the HT format.

1 = indicates use of the VHT or HE format, depending on the value of the HE field.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:MAC:VHTControl:HVINdicator?

on page 158

[:SOURce<hw>]:BB:WLNN:FBLock<ch>[:USER<di>]:MAC:VHTControl: HVINdicator? on page 153

WLAN Configuration and Settings

Spatial Mapping

4.12 Spatial Mapping

1. To access this dialog select "Frame Blocks > PPDU > Config...".

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2. Select "Spatial Mapping"

WLAN Configuration and Settings

Spatial Mapping

In this dialog, the mode, the time shifts and the transmit parameters can be configured.

The WLAN standard IEEE 802.11 builds upon previous 802.11 standards by adding MIMO (multiple-input multiple-output). MIMO uses multiple transmitter and receiver antennas for increased data throughput via spatial multiplexing and increased range by exploiting the spatial diversity. Mode, time shifts and transmit parameters are defined in the "Spatial Mapping for Frame Block" dialog.

When loaded, the spatial mapping dialog shows the frame block number for which this spatial mapping dialog is loaded. The transmit matrix corresponding to index k has N

rows (representing the number of transmit antennas) and N

columns (representing

STS

the space time streams). The text label shows the spatial mapping mode selected in the dialog which is updated whenever the mode changes. For "Physical Layer" > "Sounding", a second submatrix horizontally sided to the transmit matrix with NTX rows

and N

columns is used as a transmit matrix for the extended long training fields

ESS

(ELTF). The values displayed for the transmit matrices are also normalized (internally) so that the expectation of IQ sum-power of all antennas is 0 dBr. Also for "OFF", "Direct", and "Spatial Expansion", the expected IQ power is the same for all antennas and hence these modes can be intermixed without caring about any power regulation issue. Relative RMS levels are displayed in the dialog for each antenna.

Mode

Selects the spatial mapping mode for the selected frame block. The matrix element values are loaded using Info Class Methods.

"Off"

(available only for "Physical Mode > Legacy" frame) The spatial mapping mode is switched off automatically.

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WLAN Configuration and Settings

Spatial Mapping

"Direct"

(available only for "Physical Mode > Mixed Mode" or "Physical Mode > Green Field" when NTX = N

STS

)

Sets the spatial mapping to "Direct" mode. The transmit matrix is a CSD matrix, that is, a diagonal matrix of unit magnitude and complex values that represent cyclic shifts in the time domain.

"Indirect"

(available only for "Physical Mode > Mixed Mode" or "Physical Mode > Green Field" ) In indirect mode, the transmit matrix is the product of a CSD matrix and the Hadamard unitary matrix.

"Expansion"

(available only for "Physical Mode > Mixed Mode" or "Physical Mode > Green Field" ) In expansion mode, the transmit matrix is the product of a CSD matrix and a square matrix formed of orthogonal columns, as defined in the IEEE 802.11 specification.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SMAPping:MODE on page 172

Index k

Sets the index of the subcarrier. A matrix is mapped to each subcarrier.

Except for k = 0, the index can be set in the following ranges:

●

20 MHz channel, e.g. HT-20 MHz: -32 ... 31

●

40 MHz channel, e.g. VHT-40 MHz: -64 ... 63

●

80 MHz channel, e.g. VHT-80 MHz: -128 ... 127

●

160 MHz channel, e.g. VHT-160 MHz: -256 ... 255

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SMAPping:INDex on page 173

Time Shift

Sets the spatial mapping time shift. This value is relevant for spatial mapping mode "Direct" and "Spatial Expansion" only.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SMAPping:TSHift<st> on page 172

I (Transmit Matrix)

Displays the time shift value of element I of the selected row and column of the spatial transmit matrix.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SMAPping:ROW<st>:COL<dir>:I?

on page 173

Q (Transmit Matrix)

Displays the time shift value of element Q of the selected row and column of the spatial transmit matrix.

Remote command:

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:SMAPping:ROW<st>:COL<dir>:Q?

on page 173

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4.13 Filter / Clipping Settings

Access:

► Select "General > Filter/Clipping Settings".

The dialog comprises the settings, necessary to configure the baseband filterand to enable clipping.

4.13.1 Filter Settings

Filter settings are available only for Transmission Bandwidth set to 20 MHz.

► To access this dialog, select "Filter".

WLAN Configuration and Settings

Filter / Clipping Settings

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

Provided are the following settings for configuring the baseband filter:

Filter

Selects the baseband filter.

Remote command:

[:SOURce<hw>]:BB:WLNN:FILTer:TYPE on page 97

Roll Off Factor or BxT

Enters the filter parameters. The filter parameter offered (Roll Off factor or BxT) depends on the currently selected filter type.

The rolloff factor affects the steepness of the filter slopes. A "Rolloff Factor = 0" results in the steepest slopes; values near to 1 make the slopes more flat.

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Figure 4-1: Example of the frequency response of a filter with different Roll Off Factors

This parameter is always set to the default for each of the predefined filters.

Remote command:

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:APCO25 on page 98 [:SOURce<hw>]:BB:WLNN:FILTer:PARameter:COSine on page 98 [:SOURce<hw>]:BB:WLNN:FILTer:PARameter:GAUSs on page 99 [:SOURce<hw>]:BB:WLNN:FILTer:PARameter:PGAuss on page 100 [:SOURce<hw>]:BB:WLNN:FILTer:PARameter:RCOSine on page 100 [:SOURce<hw>]:BB:WLNN:FILTer:PARameter:SPHase on page 100

WLAN Configuration and Settings

Filter / Clipping Settings

Cut Off Frequency Factor

Sets the value for the cutoff frequency factor. The cutoff frequency of the filter can be adjusted to reach spectrum mask requirements.

Remote command:

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:LPASs on page 99 [:SOURce<hw>]:BB:WLNN:FILTer:PARameter:LPASSEVM on page 99

Cut Off Frequency Shift

(available for filter parameter Cosine only.)

The cutoff frequency is a filter characteristic that defines the frequency at the 3 dB down point. The "Cut Off Frequency Shift" affects this frequency in the way that the filter flanks are "moved" and the transition band increases by "Cut Off Frequency Shift"*"Sample Rate".

●

A "Cut Off Frequency Shift" = -1 results in a very narrow-band filter

●

Increasing the value up to 1 makes the filter more broad-band

●

By "Cut Off Frequency Shift" = 0, the -3 dB point is at the frequency determined by the half of the selected "Sample Rate".

Tip: Use this parameter to adjust the cutoff frequency and reach spectrum mask requirements.

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Figure 4-2: Example of the frequency response of a filter with different Cut Off Frequency Shift

Remote command:

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:COSine:COFS on page 98

Sample Rate Variation

Sets the sample rate of the signal.

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

Remote command:

[:SOURce<hw>]:BB:WLNN:SRATe:VARiation on page 101

WLAN Configuration and Settings

Filter / Clipping Settings

Sample Rate

Displays the sample rate of the signal specific for the selected bandwidth.

Remote command:

[:SOURce<hw>]:BB:WLNN:SRATe? on page 100

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4.13.2 Clipping Settings

► To access this dialog, select "Clipping".

WLAN Configuration and Settings

Filter / Clipping Settings

The dialog comprises the settings, necessary to configure the clipping.

Provided are the following settings:

Clipping State

Switches baseband clipping on and off.

Baseband clipping is a simple and effective way of reducing the crest factor of the signal. Since clipping is done before to filtering, the procedure does not influence the spectrum. The EVM however increases.

WLAN signals may have very high crest factors. High crest factors entail two basic problems:

●

The nonlinearity of the power amplifier (compression) causes intermodulation which expands the spectrum (spectral regrowth).

●

Since the level in the D/A converter is relative to the maximum value, the average value is converted with a relatively low resolution. This results in a high quantization noise.

Both effects increase the adjacent-channel power.

With baseband clipping, all the levels are limited to a settable value ("Clipping Level"). This level is specified as a percentage of the highest peak value. Since clipping is done prior to filtering, the procedure does not influence the spectrum. The EVM however increases.

Since clipping the signal not only changes the peak value but also the average value, the effect on the crest factor is unpredictable. The following table shows the effect of the "Clipping" on the crest factor for typical scenarios.

Remote command:

[:SOURce<hw>]:BB:WLNN:CLIPping:STATe on page 97

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Clipping Level

Sets the limit for clipping.

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

Remote command:

[:SOURce<hw>]:BB:WLNN:CLIPping:LEVel on page 96

Clipping Mode

Selects the clipping method. The dialog displays a graphical illustration on how this two methods work.

●

"Vector | i + jq |" The limit is related to the amplitude | i + q |. The I and Q components are mapped together, the angle is retained.

●

"Scalar | i | , | q |" The limit is related to the absolute maximum of all the I and Q values | i | + | q |. The I and Q components are mapped separately, the angle changes.

Remote command:

[:SOURce<hw>]:BB:WLNN:CLIPping:MODE on page 97

WLAN Configuration and Settings

Filter / Clipping Settings

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Generating a Realistic MxN MIMO WLAN 802.11n/ac/p Signal for Receiver Test under Static Conditions

How to Work with the IEEE 802.11 WLAN Option

5 How to Work with the IEEE 802.11 WLAN

Option

The R&S SMBV100B equipped with the option digital standard IEEE 802.11 WLAN allows you to generate signals for different transmitter and receiver tests scenarios.

The following step-by-step instructions provide examples of some typical generic workflows and setups for working with this options.

5.1 Generating a Realistic MxN MIMO WLAN 802.11n/ac/p Signal for Receiver Test under Static Conditions

This example shows you how to enable the R&S SMBV100B to generate a WLAN

802.11n/802.11ac/802.11p signal for simple diversity and simulation of frequency flat MIMO channel conditions. No additional channel simulator is necessary for this test application.

The figure below shows an example of a simple diversity scenario with three transmission antennas Tx1..Tx3 and one receiving antenna Rx1. The channel is represented by the weight coefficients w1 .. w3.

The R&S SMBV100B provides the possibility to weight, sum and map the generated Tx antenna signals to the output(s) of the signal generator, i.e. to simulate a frequency flat MIMO channel conditions for single carrier analysis e.g. BER tests.

The R&S SMBV100B generates the WLAN 802.11n/802.11ac/802.11p signal of one Rx antenna per baseband path. Hence, two instruments are required for the Mx2 MIMO receiver testing.

To generate a realistic WLAN 802.11n/802.11ac/802.11p MIMO signal under static conditions, configure the instrument(s) as follows:

1. In the "Frame Block Configuration" dialog set the "Std." for the required standard.

2. Use the default "Frame Block Configuration" settings or adjust them as required.

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Generating a Realistic MxN MIMO WLAN 802.11n/ac/p Signal for Receiver Test under Static Conditions

3. Use the default "PPDU Configuration" settings or adjust them if necessary to, for

instance, add redundancy.

4. In the "Transmit Antenna Setup" dialog, select the number of "Tx Antennas" to be

simulated. The number of the Tx Antennas determines the value M in the MxN MIMO system and the number of the transmission chains.

5. Configure the subcarrier to be analyzed, i.e. configure the "Spatial Mapping Mode"

and set the "Time Shifts".

How to Work with the IEEE 802.11 WLAN Option

6. In the Tx Antenna Setup dialog, enable the Baseband to generate the Rx1 signal.

7. Select the mapping coordinates and adjust the weights of the Tx signals in the

Transmission Chain Matrix.

8. To enable the R&S SMBV100B to generate a WLAN 802.11n/802.11ac/802.11p

signal of antennas with different power level, set the power level of the corresponding path to the desired level in the header display of the instrument.

9. Enable signal generation.

The Baseband of the R&S SMBV100B will generate the Rx signal as a sum of the three Tx signals, weighted with the selected coefficients.

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6 Remote-Control Commands

The following commands are required to perform signal generation with the IEEE

802.11 WLAN options in a remote environment. We assume that the R&S SMBV100B has already been set up for remote operation in a network as described in the R&S SMBV100B documentation. A knowledge about the remote control operation and the SCPI command syntax are assumed.

Conventions used in SCPI command descriptions

For a description of the conventions used in the remote command descriptions, see section "Remote Control Commands" in the R&S SMBV100B user manual.

The commands for defining the frame configuration for physical layer modes OFDM and CCK/PBCC are described in the next section. The commands are divided up in this way to make the comprehensive SOURce:BB:WLNN subsystem clearer.

Remote-Control Commands

Common suffixes

The following common suffixes are used in remote commands:

Suffix Value range Description

ENTity<ch>

SOURce<hw>

OUTPut<ch>

FBLock<ch>

MPDU<st>

USER<di>

1 Optional keyword, provided for compatibility with

R&S®SMW200A

ENTity1:SOURce1 = SOURce1

1 available baseband signals

1 to 3 available markers

[1]...100 available frame blocks

1...10 available MPDUs

1...9 available users

The following commands specific to the IEEE 802.11 WLAN are described here:

● Programming Examples..........................................................................................90

● General Commands................................................................................................92

● Filter/Clipping Settings............................................................................................ 96

● Trigger Settings.....................................................................................................101

● Marker Settings.....................................................................................................106

● Clock Settings........................................................................................................111

● Antenna Configuration Settings.............................................................................111

● Frame Block Configuration....................................................................................114

● Frame Configuration Settings............................................................................... 120

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6.1 Programming Examples

The following sections provide programming examples for the IEEE 802.11 Wlan options.

The purpose of the examples is to present all commands for a given task. In real applications, one would rather reduce the examples to an appropriate subset of commands.

The programming examples have been tested with a software tool which provides an environment for the development and execution of remote tests. To keep the example as simple as possible, only the "clean" SCPI syntax elements are reported. Non-executable command lines (e.g. comments) start with two // characters.

At the beginning of the most remote control program, an instrument reset is recommended to set the instrument to a definite state. The commands *RST and SYSTem:PRESet are equivalent for this purpose. *CLS also resets the status registers and clears the output buffer.

6.1.1 Trigger Settings

Remote-Control Commands

Programming Examples

// ******************************************************************

// Configure trigger in automatic mode.

// ******************************************************************

SOURce1:BB:WLNN:TRIGger:SEQuence AUTo

/ ******************************************************************

// Alternatively configure trigger in retrigger mode, source

// internal. Start signal generation via executing the trigger.

// ******************************************************************

SOURce1:BB:WLNN:TRIGger:SEQuence RETR

SOURce1:BB:WLNN:TRIGger:SOURce INTernal

SOURce1:BB:WLNN:TRIGger:EXEcute

******************************************************************

// Alternatively configure trigger in armed retrigger mode, use

// external global trigger. Enable synchronization output.

// Set inhibit duration, specify delay in samples.

// ******************************************************************

SOURce1:BB:WLNN:TRIGger:SEQuence ARET

SOURce1:BB:WLNN:TRIGger:SOURce EGT1

SOURce1:BB:WLNN:TRIGger:EXTernal:SYNChronize:OUTPut 1

SOURce1:BB:WLNN:TRIGger:EXTernal:INHibit 10

SOURce1:BB:WLNN:TRIGger:DELay:UNIT SAMP

SOURce1:BB:WLNN:TRIGger:EXTernal:DELay 25

/ ******************************************************************

// Alternatively set and query delay in seconds.

// ******************************************************************

SOURce1:BB:WLNN:TRIGger:DELay:UNIT TIME

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SOURce1:BB:WLNN:TRIGger:EXTernal:TDELay 0.00001

SOURce1:BB:WLNN:TRIGger:EXTernal:RDELay?

// ******************************************************************

// Configure trigger in single mode. Set the output of

// the current waveform to the first sample after

// the next trigger event. Execute the trigger.

// ******************************************************************

SOURce1:BB:WLNN:TRIGger:SEQuence SINGle

SOURce1:BB:WLNN:TRIGger:SLUNit SAMP

SOURce1:BB:WLNN:TRIGger:SLENgth 1

SOURce1:BB:WLNN:TRIGger:EXEcute

/ ******************************************************************

// Alternatively configure internal trigger in armed retrigger

// mode. Start signal generation via executing the trigger.

// Stop signal generation via arming the trigger.

// Execute the trigger again to restarts signal generation.

// ******************************************************************

SOURce1:BB:WLNN:TRIGger:SEQuence ARETrigger

SOURce1:BB:WLNN:TRIGger:SOURce INTernal

SOURce1:BB:WLNN:TRIGger:EXEcute

SOURce1:BB:WLNN:TRIGger:ARM:EXECute

SOURce1:BB:WLNN:TRIGger:EXEcute

Remote-Control Commands

Programming Examples

// ******************************************************************

// Query trigger signal generation status.

// ******************************************************************

SOURce1:BB:WLNN:TRIGger:RMODe?

6.1.2 Marker Settings

Example: Marker configuration

// ******************************************************************

// Query marker mode, set rising and falling offsets.

// ******************************************************************

SOURce:BB:WLNN:TRIGger:OUTPut2:MODE?

// RESTart

SOURce:BB:WLNN:TRIGger:OUTPut2:FOFFset 10

SOURce:BB:WLNN:TRIGger:OUTPut2:ROFFset 20

6.1.3 Clock Settings

This section is not relevant for R&S WinIQSIM2.

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Example: Clock configuration

// ******************************************************************

// Select internal clock.

// ******************************************************************

SOURce1:BB:WLNN:CLOCk:SOURce INTernal

// ******************************************************************

// Alternatively select external clock. Set its mode and query

// input frequency.

// ******************************************************************

SOURce:BB:WLNN:CLOCk:SOURce EXT

SOURce:BB:WLNN:CLOCk:MODE SAMP

CLOCk:INPUt:FREQuency?

6.2 General Commands

Remote-Control Commands

General Commands

[:SOURce<hw>]:BB:WLNN:BWidth....................................................................................92

[:SOURce<hw>]:BB:WLNN:FBLock:APPend.......................................................................93

[:SOURce<hw>]:BB:WLNN:IFBLock.................................................................................. 93

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:INSert.................................................................. 93

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:COPY.................................................................. 93

[:SOURce<hw>]:BB:WLNN:CFBLock.................................................................................93

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DELete................................................................ 93

[:SOURce<hw>]:BB:WLNN:DFBLock.................................................................................93

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PASTe..................................................................93

[:SOURce<hw>]:BB:WLNN:PFBLock................................................................................. 93

[:SOURce<hw>]:BB:WLNN:PRESet...................................................................................94

[:SOURce<hw>]:BB:WLNN:SETTing:CATalog?...................................................................94

[:SOURce<hw>]:BB:WLNN:SETTing:DELete...................................................................... 94

[:SOURce<hw>]:BB:WLNN:SETTing:LOAD........................................................................95

[:SOURce<hw>]:BB:WLNN:SETTing:STORe...................................................................... 95

[:SOURce<hw>]:BB:WLNN:STATe..................................................................................... 95

[:SOURce<hw>]:BB:WLNN:WAVeform:CREate...................................................................96

[:SOURce<hw>]:BB:WLNN:BWidth <BWidth>

The command selects the transmission bandwidth. Whenever the bandwidth changes from a higher to a lower one, the frame blocks are validated because some of them could be invalid in the lower bandwidth (invalid TX Mode).

Parameters:

<BWidth> BW20 | BW40 | BW80 | BW160

*RST: BW20 Default unit: MHz

Example:

BB:WLNN:BW BW40

sets the transmission bandwidth to 40 MHz.

Manual operation: See " Transmission Bandwidth " on page 19

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[:SOURce<hw>]:BB:WLNN:FBLock:APPend

Appends a frame block to the end of the frame blocks list.

Remote-Control Commands

General Commands

Example:

Usage: Event

Manual operation: See " Append " on page 34

[:SOURce<hw>]:BB:WLNN:IFBLock <IfBlock> [:SOURce<hw>]:BB:WLNN:FBLock<ch>:INSert

The command adds a default frame block before the selected frame block.

Example:

Usage: Event

Manual operation: See " Insert " on page 34

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:COPY [:SOURce<hw>]:BB:WLNN:CFBLock <CfBlock>

Copies the selected frame block.

Setting parameters:

<CfBlock> integer

BB:WLNN:FBL:APP

BB:WLNN:FBL2:INS

inserts a default frame block before the selected frame block.

Range: 1 to 100

Example:

Usage: Setting only

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:DELete [:SOURce<hw>]:BB:WLNN:DFBLock <DfBlock>

Deletes the selected frame block.

Setting parameters:

<DfBlock> integer

Example:

Usage: Setting only

[:SOURce<hw>]:BB:WLNN:FBLock<ch>:PASTe [:SOURce<hw>]:BB:WLNN:PFBLock <PfBlock>

Pastes the selected frame block.

BB:WLNN:CFBL 5

copies frame block 5 for later insertion.

Range: 1 to 100

BB:WLNN:DFBL 10

deletes the selected frame block.

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Setting parameters:

<PfBlock> integer

Remote-Control Commands

General Commands

Range: 1 to 99

Example:

Usage: Setting only

[:SOURce<hw>]:BB:WLNN:PRESet

Sets the parameters of the digital standard to their default values (*RST values specified for the commands).

Not affected is the state set with the command SOURce<hw>:BB:WLNN:STATe.

Example:

Usage: Event

Manual operation: See "Set to Default" on page 17

[:SOURce<hw>]:BB:WLNN:SETTing:CATalog?

Reads out the files with IEEE 802.11a/b/g/n/ac settings in the default directory. The default directory is set using command MMEM:CDIRectory. Only files with the file extension *.wlann will be listed.

Return values:

<Catalog> string

BB:WLNN:PFBL 20

pastes the frame block to row 20.

SOURce:BB:WLNN:PRESet

Example:

Usage: Query only

Manual operation: See "Save/Recall" on page 18

[:SOURce<hw>]:BB:WLNN:SETTing:DELete <Filename>

Deletes the selected file with IIEEE 802.11a/b/g/n/ac settings. The directory is set using command MMEM:CDIRectory. A path can also be specified, in which case the files in the specified directory are read. The file extension may be omitted. Only files with the file extension *.wlann are listed and can be deleted.

Setting parameters:

<Filename> string

MMEM:CDIR '/var/user/temp/wlann'

Sets the default directory to /var/user/temp/wlann.

BB:WLNN:SETT:CAT?

Reads out all the files with IEEE 802.11 settings in the default directory.

Response: 'wlann_1','wlann_2' The files ''wlann1' and 'wlann2'' are available.

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Remote-Control Commands

General Commands

Example:

Usage: Setting only

Manual operation: See "Save/Recall" on page 18

[:SOURce<hw>]:BB:WLNN:SETTing:LOAD <Filename>

Loads the selected file with IEEE 802.11 WLAN settings. The directory is set using command MMEM:CDIRectory. A path can also be specified, in which case the files in the specified directory are read. The file extension may be omitted. Only files with the file extension *.wlann will be loaded.

Setting parameters:

<Filename> string

Example:

Usage: Setting only

Manual operation: See "Save/Recall" on page 18

BB:WLNN:SETT:DEL 'wlann_1' Deletes file 'wlann_1'.

BB:WLNN:SETT:LOAD 'wlann_1' Loads file 'wlann_1'.

[:SOURce<hw>]:BB:WLNN:SETTing:STORe <Filename>

Stores the current IEEE 802.11a/b/g/n/ac settings into the selected file. The directory is set using command MMEM:CDIRectory. A path can also be specified, in which case the files in the specified directory are read. Only the file name has to be entered. IEEE

802.11a/b/g/n/ac settings are stored as files with the specific file extensions *.wlann.

Setting parameters:

<Filename> string

Example:

Usage: Setting only

Manual operation: See "Save/Recall" on page 18

[:SOURce<hw>]:BB:WLNN:STATe <State>

Activates the standard and deactivates all the other digital standards and digital modulation modes in the same path.

Parameters:

<State> 0 | 1 | OFF | ON

BB:WLNN:SETT:STOR 'wlann_1'

Stores the current settings into file 'wlann_1'.

*RST: 0

Example:

Manual operation: See "State" on page 17

SOURce1:BB:WLNN:STATe ON

Activates the standard.

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[:SOURce<hw>]:BB:WLNN:WAVeform:CREate <Filename>

Creates a waveform using the current settings of the "WLAN" menu. The file name is entered with the command. The file is stored with the predefined file extension *.wv. The file name and the directory it is stored in are user-definable.

Setting parameters:

<Filename> string

Remote-Control Commands

Filter/Clipping Settings

6.3

Example:

MMEM:CDIR '/var/user/temp/waveform'

Sets the default directory to /var/user/temp/waveform.

BB:WLNN:WAV:CRE 'wlann_1' Creates the waveform file wlann_1.wv in the default directory.

Usage: Setting only

Manual operation: See "Generate Waveform File" on page 19

Filter/Clipping Settings

[:SOURce<hw>]:BB:WLNN:CLIPping:LEVel........................................................................96

[:SOURce<hw>]:BB:WLNN:CLIPping:MODE...................................................................... 97

[:SOURce<hw>]:BB:WLNN:CLIPping:STATe....................................................................... 97

[:SOURce<hw>]:BB:WLNN:FILTer:TYPE............................................................................ 97

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:APCO25...................................................... 98

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:COSine........................................................98

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:COSine:COFS..............................................98

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:GAUSs........................................................ 99

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:LPASs......................................................... 99

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:LPASSEVM..................................................99

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:PGAuss..................................................... 100

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:RCOSine................................................... 100

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:SPHase..................................................... 100

[:SOURce<hw>]:BB:WLNN:SRATe?.................................................................................100

[:SOURce<hw>]:BB:WLNN:SRATe:VARiation................................................................... 101

[:SOURce<hw>]:BB:WLNN:CLIPping:LEVel <Level>

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

Level clipping is activated if [:SOURce<hw>]:BB:WLNN:CLIPping:STATe is set to ON.

Parameters:

<Level> integer

Range: 1 PCT to 100 PCT Increment: 1 PCT *RST: 100 PCT

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Remote-Control Commands

Filter/Clipping Settings

Example:

Manual operation: See "Clipping Level" on page 86

[:SOURce<hw>]:BB:WLNN:CLIPping:MODE <Mode>

Sets the method for level clipping.

Parameters:

<Mode> VECTor | SCALar

Example:

BB:WLNN:CLIP:LEV 80PCT

Sets the limit for level clipping to 80% of the maximum level.

BB:WLNN:CLIP:STAT ON

Activates level clipping.

VECTor

The reference level is the amplitude | i+jq |.

SCALar

The reference level is the absolute maximum of the I and Q values.

*RST: VECTor

BB:WLNN:CLIP:MODE SCAL

Selects the absolute maximum of all the I and Q values as the reference level.

BB:WLNN:CLIP:LEV 80PCT

Sets the limit for level clipping to 80% of this maximum level.

BB:WLNN:CLIP:STAT ON

Activates level clipping.

Manual operation: See "Clipping Mode" on page 86

[:SOURce<hw>]:BB:WLNN:CLIPping:STATe <State>

Activates level clipping (Clipping). The value is defined with [:SOURce<hw>]:BB:

WLNN:CLIPping:LEVel, the mode of calculation with [:SOURce<hw>]:BB:WLNN: CLIPping:MODE.

Parameters:

<State> 0 | 1 | OFF | ON

*RST: 0

Example:

Manual operation: See "Clipping State" on page 85

[:SOURce<hw>]:BB:WLNN:FILTer:TYPE <Type>

The command selects the filter type.

BB:WLNN:CLIP:STAT ON

Activates level clipping.

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Parameters:

Remote-Control Commands

Filter/Clipping Settings

*RST: Depends on layer mode

Example:

Manual operation: See "Filter" on page 82

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:APCO25 <Apco25>

Sets the roll-off factor for filter type APCO25.

Parameters:

<Apco25> float

Example:

Manual operation: See " Roll Off Factor or BxT " on page 82

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:COSine <Cosine>

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

BB:WLNN:FILT:TYPE COS

sets the filter type COSine.

Range: 0.05 to 0.99 Increment: 0.01 *RST: 0.2

BB:WLNN:PAR:APCO25 0.2

Sets the roll-off factor to 0.2 for filter type APCO25.

Parameters:

<Cosine> float

Range: 0 to 1 Increment: 0.01 *RST: 0.1

Example:

Manual operation: See " Roll Off Factor or BxT " on page 82

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:COSine:COFS <CoFs>

The command sets the "cut of frequency shift' value for the Cosine filter type.

Parameters:

<CoFs> float

BB:WLNN:PAR:COS 0.35

Sets the roll-off factor to 0.35 for filter type cosine.

Range: -1 to 1 Increment: 0.01 *RST: 0

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Remote-Control Commands

Filter/Clipping Settings

Example:

Manual operation: See " Cut Off Frequency Shift " on page 83

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:GAUSs <Gauss>

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

Parameters:

<Gauss> float

Example:

Manual operation: See " Roll Off Factor or BxT " on page 82

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:LPASs <LPass>

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

BB:WLNN:FILT:PAR:COS:COFS 0.04

the "cut of frequency shift" value is set to 0.04.

Range: 0.15 to 2.5 Increment: 0.01 *RST: 0.5

BB:WLNN:PAR:GAUS 0.5

Sets B x T to 0.5 for the Gauss filter type.

Parameters:

<LPass> float

Range: 0.05 to 2 Increment: 0.01 *RST: 0.5

Example:

Manual operation: See "Cut Off Frequency Factor" on page 83

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:LPASSEVM <LPassevm>

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

Parameters:

<LPassevm> float

Example:

Manual operation: See "Cut Off Frequency Factor" on page 83

BB:WLNN:FILT:PAR:LPAS 0.5

The cut of frequency factor is set to 0.5.

Range: 0.05 to 2 Increment: 0.01 *RST: 0.5

BB:WLNN:FILT:PAR:LPASSEVM 0.5

The cut of frequency factor is set to 0.5.

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[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:PGAuss <PGauss>

Sets the roll-off factor for the pure gauss filter type.

Parameters:

<PGauss> float

Remote-Control Commands

Filter/Clipping Settings

Range: 0.15 to 2.5 Increment: 0.01 *RST: 0.5

Example:

Manual operation: See " Roll Off Factor or BxT " on page 82

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:RCOSine

Sets the roll-off factor for the root cosine filter type.

Parameters:

<RCosine> float

Example:

Manual operation: See " Roll Off Factor or BxT " on page 82

[:SOURce<hw>]:BB:WLNN:FILTer:PARameter:SPHase <SPhase>

Sets B x T for the Split Phase filter type.

BB:WLLN:FILT:PAR:PGAUS 0.5

Sets B x T to 0.5 for the pure gauss filter type.

Range: 0 to 1 Increment: 0.01 *RST: 0.22

BB:WLNN:PAR:RCOS 0.22

Sets the roll-off factor to 0. 22 for filter type root cosine.

Parameters:

<SPhase> float

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

Example:

Manual operation: See " Roll Off Factor or BxT " on page 82

[:SOURce<hw>]:BB:WLNN:SRATe?

Displays the sample rate specific for the selected bandwidth ([:SOURce<hw>]:BB:

WLNN:BWidth).

BB:WLNN:PAR:SPH 0.5

Sets B x T to 0.5 for the Split Phase filter type.

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Rohde & Schwarz SMBVB-K54, SMBVB-K142, SMBVB-K86 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

1 Preface

1.1 About This Manual

1.2 Documentation Overview

1.2.1 Getting Started Manual

1.2.2 User Manuals and Help

1.2.3 Service Manual

1.2.4 Instrument Security Procedures

1.2.5 Basic Safety Instructions

1.2.6 Data Sheets and Brochures

1.2.7 Release Notes and Open Source Acknowledgment (OSA)

1.2.8 Application Notes, Application Cards, White Papers, etc.

Welcome to the IEEE 802.11 WLAN Digital Standard

2.1 Accessing the IEEE 802.11 WLAN Dialog

2.2 Scope

2.3 Notes on Screenshots

3 About IEEE 802.11 WLAN and Basics

3.1 Operation Modes

3.2 Signal Generation

4 WLAN Configuration and Settings

4.1 General Settings

4.2 Transmit Antenna Setup

4.2.1 Antenna and Mapping Setting

4.2.2 Transmission Chain Matrix

4.3 Trigger Settings

4.4 Marker Settings

4.5 Clock Settings

4.6 Global Connector Settings

4.7 Frame Block Configuration

4.8 PPDU Configuration

4.8.1 General Settings

4.8.1.1 Stream Settings

4.8.1.2 User Settings

4.8.1.3 Modulation and Coding Scheme

4.8.1.4 PSDU Bit Rate (CCK/PBCC)

4.8.2 HE Configuration Settings

4.8.2.1 HE General Configuration Settings

4.8.2.2 Additional HE-SIG-A-Fields

4.8.2.3 Logging

4.8.3 User Configuration

4.8.4 Data Settings

4.8.4.1 Data Settings

4.8.4.2 Header Settings

4.9 A-MPDU Settings

4.10 MAC Header and FCS Configuration for Frame Block

4.10.1 MAC Header and FCS

4.10.2 802.11 MAC Frame Field

4.10.3 Beacon Settings

4.10.3.1 General Beacon Functions

4.10.3.2 Capability Information Parameters

4.10.3.3 ERP Parameters

4.10.3.4 HT Capability Information

4.10.4 Trigger Frame Settings

4.10.4.1 Common Info Field

4.10.4.2 User Info Field

4.11 MAC Header HT/HE and VHT Configuration

4.11.1 Common Settings

4.11.2 MAC HT Configuration

4.11.3 MAC VHT Configuration

4.11.4 MAC HE Configuration

4.12 Spatial Mapping

4.13 Filter / Clipping Settings

4.13.1 Filter Settings

4.13.2 Clipping Settings

How to Work with the IEEE 802.11 WLAN Option

5.1 Generating a Realistic MxN MIMO WLAN 802.11n/ac/p Signal for Receiver Test under Static Conditions

6 Remote-Control Commands

6.1 Programming Examples

6.1.1 Trigger Settings

6.1.2 Marker Settings

6.1.3 Clock Settings

6.2 General Commands

Filter/Clipping Settings