Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for R&S SMW-K548
Summary of Contents for R&S SMW-K548
- Page 1 ® R&S SMW-K548 Crest Factor Reduction User Manual (;Ý9W2) 1179093902...
- Page 2 This document describes the following software options: ● R&S ® SMW-K548 1423.8820.02 This manual describes firmware version FW 4.70.026.xx and later of the R&S ® SMW200A. © 2019 Rohde & Schwarz GmbH & Co. KG Mühldorfstr. 15, 81671 München, Germany...
-
Page 3: Table Of Contents
1.2.8 Release Notes and Open Source Acknowledgment (OSA)..........7 1.2.9 Application Notes, Application Cards, White Papers, etc..........7 2 Welcome to the R&S SMW-K548 Option..........8 Accessing the Required Settings................8 Scope..........................9 Notes on Screenshots....................9 3 About this Manual................10 4 Crest Factor Reduction Settings............ - Page 4 ® Contents R&S SMW-K548 User Manual 1179.0939.02 ─ 01...
-
Page 5: Preface
The main focus in this manual is on the provided settings and the tasks required to generate a signal. The following topics are included: ● Welcome to the Crest Facor Reduction option R&S SMW-K548 Introduction to and getting familiar with the option ●... -
Page 6: User Manuals And Help
® Preface R&S SMW-K548 Documentation Overview 1.2.2 User Manuals and Help Separate manuals for the base unit and the software options are provided for down- load: ● Base unit manual Contains the description of all instrument modes and functions. It also provides an... -
Page 7: Data Sheets And Brochures
® Preface R&S SMW-K548 Documentation Overview 1.2.7 Data Sheets and Brochures The data sheet contains the technical specifications of the R&S SMW. It also lists the options and their order numbers and optional accessories. The brochure provides an overview of the instrument and deals with the specific char- acteristics. -
Page 8: Welcome To The R&S Smw-K548 Option
R&S SMW-K548 Accessing the Required Settings 2 Welcome to the R&S SMW-K548 Option The R&S SMW-K548 is a software option that allows you to generate signals with reduced crest factor. R&S SMW-K548 key features ● Reduces the crest factor of a baseband signal through clipping the high signal peaks and filtering the waveform afterwards. -
Page 9: Scope
® Welcome to the R&S SMW-K548 Option R&S SMW-K548 Notes on Screenshots 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: ●... -
Page 10: About This Manual
The main focus in this manual is on the provided settings and the tasks required to generate a signal. The following topics are included: ● Welcome to the Crest Facor Reduction option R&S SMW-K548 Introduction to and getting familiar with the option ●... -
Page 11: Crest Factor Reduction Settings
® Crest Factor Reduction Settings R&S SMW-K548 4 Crest Factor Reduction Settings Prerequisite: An ARB file is loaded and enabled. Access: ► Select the "Baseband > ARB > Crest Factor Reduction". The remote commands required to define these settings are described in Chapter 5, "Remote-Control... - Page 12 ® Crest Factor Reduction Settings R&S SMW-K548 Generate Waveform With enabled signal generation, triggers the instrument to store the current settings in a waveform file. Waveform files can be further processed. The filename and the directory it is stored in are user-definable; the predefined file extension for waveform files is *.wv.
- Page 13 ® Crest Factor Reduction Settings R&S SMW-K548 "Simple" You can specify the RF bandwidth and channel spacing of the signal. The lowpass filter is designed to pass through frequency components inside the signal bandwidth and suppress components in the adjacent channel.
- Page 14 ® Crest Factor Reduction Settings R&S SMW-K548 Remote command: on page 19 [:SOURce<hw>]:BB:ARBitrary:CFR:SBANdwidth Stopband Freqeuncy Available for "Filter Mode > Enhanced". Sets the stopband frequency of the filter. Frequency components higher than the stop- band frequency are filtered out by the lowpass filter.
-
Page 15: Remote-Control Commands
® Remote-Control Commands R&S SMW-K548 5 Remote-Control Commands The following commands are required to perform signal generation in a remote envi- ronment. We assume that the R&S SMW has already been set up for remote operation in a network as described in the R&S SMW user manual. Knowledge about the remote control operation and the SCPI command syntax is assumed. - Page 16 SOURce1:BB:ARBitrary:CFR:RCFactor? SOURce1:BB:ARBitrary:CFR:CREate "cfr" Example: Setting up an Enhanced Filter SOURce1:BB:ARBitrary:CFR:FILTer ENHanced SOURce1:BB:ARBitrary:CFR:PFReq 9E6 SOURce1:BB:ARBitrary:CFR:SFReq 11E6 SOURce1:BB:ARBitrary:CFR:FORDer 100 The following commands specific to the R&S SMW-K548 option are described here: ............... 16 [:SOURce<hw>]:BB:ARBitrary:CFR[:STATe] ..............17 [:SOURce<hw>]:BB:ARBitrary:CFR:ALGorithm ..............17 [:SOURce<hw>]:BB:ARBitrary:CFR:CSPacing ..............17 [:SOURce<hw>]:BB:ARBitrary:CFR:DCFDelta...
- Page 17 ® Remote-Control Commands R&S SMW-K548 [:SOURce<hw>]:BB:ARBitrary:CFR:ALGorithm <ArbCfrAlgorithm> Displays the algorithm used for the crest factor reduction. The "Clipping and filtering" algorithm performs a hard clipping. It is followed by a low pass filtering of the result in an iterative manner until the target crest factor is reached. You can define the settings of the filter that is used for the calculation.
- Page 18 ® Remote-Control Commands R&S SMW-K548 Manual operation: "Filter Mode" on page 12 [:SOURce<hw>]:BB:ARBitrary:CFR:FORDer <ArbCfrMaxFilOrd> Sets the maximum filter order, if [:SOURce<hw>]:BB:ARBitrary:CFR:FILTer set to ENHanced. Parameters: <ArbCfrMaxFilOrd> integer Range: 0 to 300 *RST: Example: Example "Configuring the CFR" on page 16.
- Page 19 ® Remote-Control Commands R&S SMW-K548 Return values: <ArbCfrOCrestFac> float Range: 1 to 100 Increment: 0.01 *RST: Example: Example "Configuring the CFR" on page 16. Usage: Query only Manual operation: "Original Crest Factor" on page 12 [:SOURce<hw>]:BB:ARBitrary:CFR:PFReq <ArbCfrPassBFreq> Sets the passband frequency, if [:SOURce<hw>]:BB:ARBitrary:CFR:FILTer...
- Page 20 ® Remote-Control Commands R&S SMW-K548 Parameters: <ArbCfrSignalBw> float Range: 0 to depends on the sample rate of the loaded file Increment: 0.1 *RST: 250E6 Example: Example "Configuring the CFR" on page 16. Manual operation: "Signal Bandwidth" on page 13 [:SOURce<hw>]:BB:ARBitrary:CFR:SFReq <ArbCfrStopBFreq>...
-
Page 21: List Of Commands
® List of Commands R&S SMW-K548 List of Commands [:SOURce<hw>]:BB:ARBitrary:CFR:ALGorithm....................17 [:SOURce<hw>]:BB:ARBitrary:CFR:CSPacing....................17 [:SOURce<hw>]:BB:ARBitrary:CFR:DCFDelta....................17 [:SOURce<hw>]:BB:ARBitrary:CFR:FILTer..................... 17 [:SOURce<hw>]:BB:ARBitrary:CFR:FORDer....................18 [:SOURce<hw>]:BB:ARBitrary:CFR:ITERations....................18 [:SOURce<hw>]:BB:ARBitrary:CFR:MEASure[:STATe]?.................18 [:SOURce<hw>]:BB:ARBitrary:CFR:OCFactor?....................18 [:SOURce<hw>]:BB:ARBitrary:CFR:PFReq....................19 [:SOURce<hw>]:BB:ARBitrary:CFR:RCFactor?....................19 [:SOURce<hw>]:BB:ARBitrary:CFR:SBANdwidth................... 19 [:SOURce<hw>]:BB:ARBitrary:CFR:SFReq....................20 [:SOURce<hw>]:BB:ARBitrary:CFR:WAVeform:CREate................. 20 [:SOURce<hw>]:BB:ARBitrary:CFR[:STATe]....................16 User Manual 1179.0939.02 ─ 01... -
Page 22: Index
® Index R&S SMW-K548 Index Application cards ..............7 Application notes ..............7 Brochures ................7 Conventions SCPI commands ............15 Data sheets ................. 7 Documentation overview ............. 5 Generate Waveform file .............. 12 Getting started ..............5 Help ..................6 Installation ................