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R&S SMBVB-K548, User Manual

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R&S SMBVB-K548 User Manual Download Page 14

Crest Factor Reduction Settings

R&S

®

SMBVB-K548

14

User Manual 1179.0922.02 ─ 01

Remote command: 

[:SOURce<hw>]:BB:ARBitrary:CFR:SBANdwidth

 

on page 19

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.

Remote command: 

[:SOURce<hw>]:BB:ARBitrary:CFR:SFReq

 

on page 20

Passband Freqeuncy

Available for "Filter Mode > Enhanced".

Sets the passband frequency. Frequency components lower than the passband fre-
quency are passed through unfiltered.

Remote command: 

[:SOURce<hw>]:BB:ARBitrary:CFR:PFReq

 

on page 19

Maximum Filter Order

Available for "Filter Mode > Enhanced".

Sets the maximum filter order.

Remote command: 

[:SOURce<hw>]:BB:ARBitrary:CFR:FORDer

 

on page 18

Summary of Contents for SMBVB-K548

Page 1: ...R S SMBVB K548 Crest Factor Reduction User Manual User Manual Version 01 1179092202 9F2...

Page 2: ...1 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...

Page 3: ...ures 6 1 2 5 Basic 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 7 2 Welco...

Page 4: ...Contents R S SMBVB K548 4 User Manual 1179 0922 02 01...

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: ...for checking the rated specifications module replace ment and repair firmware update troubleshooting and fault elimination and contains mechanical drawings and spare part lists The service manual is a...

Page 7: ...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 1 2 8 Applicati...

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 SMBV100B user manual 2 3 Notes on...

Page 10: ...crest factors entail two basic problems The nonlinearity of the power amplifier compression causes intermodulation which expands the spectrum spectral regrowth Since the level of the D A converter is...

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 Freqeuncy Available for Filter Mode Enhanced Sets the passband frequency Frequenc...

Page 15: ...examples for the R S SMBV100B 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 SMBVB 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 Freqeuncy 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: ...ta sheets 6 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 Rel...

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