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Welcome to the R&S

 

SMCVB-K548 Option

R&S

®

SMCVB-K548

8

User Manual 1179.1293.02 ─ 02

2

 

Welcome to the R&S

 

SMCVB-K548 Option

The R&S

 

SMCVB-K548 is a software option that allows you to generate signals with

reduced crest factor.

R&S

 

SMCVB-K548 key features

Reduces the crest factor of a baseband signal through clipping the high signal
peaks and filtering the waveform afterwards.

Can be applied to any waveform file loaded in the arbitrary waveform generator.

It uses an iterative process to reach the desired crest factor delta.

It is possible to adjust the filter characteristics. In simple mode, you can specify the
channel spacing and signal bandwidth. Alternatively in the advanced filter mode
you can specify the lowpass filter through passband and stopband frequencies.

This user manual contains a description of the functionality that the application pro-
vides, 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

 

SMCV100B user manual. The latest version is available at:

www.rohde-schwarz.com/manual/SMCV100B

Installation

You can find detailed installation instructions in the delivery of the option or in the
R&S

 

SMCV100B service manual.

2.1

 

Accessing the Required Settings

1. In the block diagram of the R&S

 

SMCV100B, select the "Baseband" > "ARB".

A dialog box opens that displays the provided general settings.

2. Select "Load Waveform".

Navigate to waveform file and load it.

3. Select "ARB > State > On".

4. Select "Crest Factor Reduction".

The signal generation is started. To apply the crest factor reduction with the default set-
tings, select "State > On".

Accessing the Required Settings

Summary of Contents for SMCVB-K548

Page 1: ...R S SMCVB K548 Crest Factor Reduction User Manual User Manual Version 02 1179129302 2...

Page 2: ...one 49 89 41 29 0 Email info rohde schwarz com Internet www rohde schwarz com Subject to change Data without tolerance limits is not binding R S is a registered trademark of Rohde Schwarz GmbH Co KG T...

Page 3: ...Procedures 6 1 2 5 Printed Safety Instructions 6 1 2 6 Data Sheets and Brochures 6 1 2 7 Release Notes and Open Source Acknowledgment OSA 7 1 2 8 Application Notes Application Cards White Papers etc...

Page 4: ...Contents R S SMCVB K548 4 User Manual 1179 1293 02 02...

Page 5: ...nding remote control command Remote Control Commands Remote commands required to configure and perform signal generation in a remote environment sorted by tasks Commands required to set up the instrum...

Page 6: ...All user manuals are also available for download or for immediate display on the Inter net 1 2 3 Service Manual Describes the performance test for checking the rated specifications module replace ment...

Page 7: ...urrent 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 firmwa...

Page 8: ...through passband and stopband frequencies This user manual contains a description of the functionality that the application pro vides including remote control operation All functions not discussed in...

Page 9: ...ion such as checking the system configuration con figuring networks and remote operation Using the common status registers For a description of such tasks see the R S SMCV100B user manual 2 3 Notes on...

Page 10: ...ut the Crest Facor Reduction Background information on basic terms and principles in the context of the signal generation Configuration and Settings A concise description of all functions and settings...

Page 11: ...ate 11 Generate Waveform 12 Algorithm 12 Desired Crest Factor Delta 12 Max Iterations 12 Original Crest Factor 12 Resulting Crest Factor 12 Filter Mode 12 Channel Spacing 13 Signal Bandwidth 13 Stopba...

Page 12: ...want to change your crest factor Remote command SOURce hw BB ARBitrary CFR DCFDelta on page 17 Max Iterations Sets the number of iterations that are used for calculating the resulting crest factor Th...

Page 13: ...e filter mode Enhanced In the enhanced filter mode you can specify the passband and stop band frequencies of the lowpass filter Figure 4 2 Enhanced filter mode Remote command SOURce hw BB ARBitrary CF...

Page 14: ...d frequency are filtered out by the lowpass filter Remote command SOURce hw BB ARBitrary CFR SFReq on page 20 Passband Frequency Available for Filter Mode Enhanced Sets the passband frequency Frequenc...

Page 15: ...examples for the R S SMCV100B 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 appropri ate subset of commands Th...

Page 16: ...CFR SFReq 11E6 SOURce1 BB ARBitrary CFR FORDer 100 The following commands specific to the R S SMCVB K548 option are described here SOURce hw BB ARBitrary CFR STATe 16 SOURce hw BB ARBitrary CFR ALGor...

Page 17: ...ing ArbCfrChanSpac Sets the channel spacing if SOURce hw BB ARBitrary CFR FILTer is set to SIMPle Parameters ArbCfrChanSpac float Range 0 to depends on the sample rate of the loaded file Increment 0 1...

Page 18: ...when the desired crest factor delta is achieved by 0 1 dB Parameters ArbCfrMaxIter integer Range 1 to 10 RST 5 Example See Example Configuring the CFR on page 16 Manual operation See Max Iterations on...

Page 19: ...ample Setting up an Enhanced Filter on page 16 Manual operation See Passband Frequency on page 14 SOURce hw BB ARBitrary CFR RCFactor Queries the resulting crest factor of the waveform after the calcu...

Page 20: ...ss filter Parameters ArbCfrStopBFreq float Range 0 to depends on the sample rate of the loaded file Increment 0 1 RST 250E6 Example See Example Setting up an Enhanced Filter on page 16 Manual operatio...

Page 21: ...trary 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 ARBitr...

Page 22: ...Documentation overview 5 G Generate Waveform file 12 Getting started 5 H Help 6 I Installation 8 Instrument help 6 Instrument security procedures 6 O Open source acknowledgment OSA 7 R Release notes...

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