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Rohde & Schwarz R&S CMW-B400B User Manual

Rohde & Schwarz R&S CMW-B400B User Manual

Audio measurements
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R&S
CMW-B400B/-B405A
Audio Measurements
User Manual
(;Úß@2)
1176.8116.02 ─ 01

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Summary of Contents for Rohde & Schwarz R&S CMW-B400B

  • Page 1 ® R&S CMW-B400B/-B405A Audio Measurements User Manual (;Úß@2) 1176.8116.02 ─ 01...
  • Page 2 ® This user manual describes the following R&S CMW options: ● ® R&S CMW-B400B (Audio analyzer/generator, for new units and units delivered after September 2011) ● R&S ® CMW-U400 (Audio analyzer/generator, for units delivered before September 2011) ● ® R&S CMW-B405A (Speech codec) ©...

  • Page 3: Table Of Contents

    ® Contents R&S CMW-B400B/-B405A Contents 1 Preface....................7 How to Read Firmware Application Chapters............7 1.1.1 General Description......................7 1.1.2 Application Sheets......................7 1.1.3 GUI Reference........................8 1.1.4 Programming Examples....................8 1.1.5 Command Reference......................8 2 What's New in this Revision..............9 3 General Description................10 Test Setups........................11 3.1.1 Audio Connectors......................11 3.1.2 Test Setup for Audio Measurement and Generator............12...
  • Page 4 ® Contents R&S CMW-B400B/-B405A 4.3.1 General Settings (Analog).....................29 4.3.2 General Settings (Digital)....................31 4.3.3 Single Tone Settings.....................32 4.3.4 Multitone Settings......................34 4.3.5 FFT Noise Settings.......................36 Audio Generator Settings...................37 4.4.1 General Settings......................37 4.4.2 Single Tone Settings.....................38 4.4.3 Multitone Settings......................38 4.4.4 FFT Noise Settings.......................40 Speech Analysis Settings..................41 5 Programming..................43 Audio Measurement and Generator Scenario............43...
  • Page 5 ® Contents R&S CMW-B400B/-B405A 6.3.8 FFT Noise Measurement Results.................72 Audio Generators......................74 6.4.1 Generator Control and States..................74 6.4.2 General Generator Settings..................75 6.4.3 Single Tone Generator Settings..................75 6.4.4 Multitone Generator Settings..................76 6.4.5 FFT Noise Generator Settings..................82 Speech Analysis......................83 List of Commands................84 Index......................87 User Manual 1176.8116.02 ─...
  • Page 6 ® Contents R&S CMW-B400B/-B405A User Manual 1176.8116.02 ─ 01...

  • Page 7: Preface

    ® Preface R&S CMW-B400B/-B405A How to Read Firmware Application Chapters 1 Preface The operation of the R&S CMW is described in several user manuals: ● The R&S CMW user manual describes the base software, common features of the firmware applications and basic principles for manual operation and remote control. ●...

  • Page 8: Gui Reference

    ® Preface R&S CMW-B400B/-B405A How to Read Firmware Application Chapters 1.1.3 GUI Reference The GUI reference describes the manual operation of the firmware application via the Graphical User Interface (GUI). The description of a configuration dialog usually starts with a screenshot presenting the preset values of the parameters (sometimes preset values are modified to enable hidden parts of a dialog).

  • Page 9: What's New In This Revision

    ® What's New in this Revision R&S CMW-B400B/-B405A 2 What's New in this Revision This revision describes version 3.2.10 and later of the "Audio Measurement" firmware application. This is the initial software version. User Manual 1176.8116.02 ─ 01...

  • Page 10: General Description

    ® General Description R&S CMW-B400B/-B405A 3 General Description The "Audio Analyzer/Generator" option enhances the R&S CMW for audio tests. A single option (R&S CMW-B400B or R&S CMW-U400) provides an audio board, two analog and two digital audio generator instances, two analog and two digital audio measurement instances, four analog AF connectors at the front panel and two digital SPDIF connectors at the rear panel.

  • Page 11: Test Setups

    ® General Description R&S CMW-B400B/-B405A Test Setups The current software version supports only one speech codec, but the audio board hard- ware is ready for two speech codecs. For future software releases the full support of two independently operating speech codecs is planned. A single speech codec provides a bidirectional interface (encoding and decoding) for a single signaling application instance at a time.

  • Page 12: Test Setup For Audio Measurement And Generator

    ® General Description R&S CMW-B400B/-B405A Test Setups Connector selection Whether AF 1 or AF 2 / SPDIF-L or SPDIF-R are used, depends on the instance (1 or 2) of the audio application and on the sub-instrument configuration of the instrument (all resources in one sub-instrument or instrument split into two sub-instruments), as shown in the following table.

  • Page 13: Test Setup For Microphone- And Speaker Test

    ® General Description R&S CMW-B400B/-B405A Test Setups Fig. 3-2: Test setup for A/D or D/A converter, coupled measurement and generator Single tone measurements can also be performed without using the audio generator. In that case only an audio connection from the DUT to an AF IN or SPDIF IN connector is required.

  • Page 14: Test Setup For External Speech Analysis

    ® General Description R&S CMW-B400B/-B405A Test Setups Fig. 3-3: Test setup for microphone and speaker test If your DUT supports electrical coupling, you can test the speaker and the microphone simultaneously. If you use acoustical coupling, it is recommended to test speaker and microphone one after another (switch on only one generator at a time), so that the two acoustical couplings at the DUT can not interfere with each other.

  • Page 15: Performing Audio Measurements

    ® General Description R&S CMW-B400B/-B405A Performing Audio Measurements To test the speech quality of the speaker path, an external audio generator provides an audio signal that is routed to an AF IN or SPDIF IN connector. The audio signal is encoded and modulated in the R&S CMW and routed via the RF connection to the DUT.

  • Page 16: Af Filter Settings

    ® General Description R&S CMW-B400B/-B405A AF Filter Settings a) Select the "Analog Meas" tab or "Digital Meas" tab. b) Select the relevant generator softkey ("Analog Generator" or "Digital Genera- tor"). c) Press "ON | OFF" and wait until the generator softkey indicates the "ON" state and the hour glass symbol has disappeared.

  • Page 17: Measurement Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results Several weighting filters with different shape have been standardized. The following filters are supported: – A-weighting filter defined in IEC 61672. The A-weighted scale is commonly used in local ordinances and standards. – CCITT weighting filter defined in ITU-T Rec.

  • Page 18: Single Tone Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results 3.4.1 Single Tone Results To perform a harmonics measurement, a fixed frequency sine wave audio test tone (sin- gle tone) is transmitted. Harmonics are signals at an integer multiple of the fundamental frequency. The n harmonic is n times the frequency of the fundamental wave.
  • Page 19 ® General Description R&S CMW-B400B/-B405A Measurement Results Table rows The table rows provide the following results: ● THD: Total Harmonic Distortion, ratio of the harmonic distortion voltage to the fundamental wave voltage, in percent and as dB value. THD [%] = sqrt (D / S) * 100 THD [dB] = 20 * log (sqrt (D / S)) = 10 * log (D / S) The R&S CMW displays THD [%] values up to 100 %.

  • Page 20: Multitone Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results Fig. 3-8: Single tone spectrum diagram The diagram shows the measured audio level vs. the frequency. A rectangular window with constant weighting is used. 3.4.2 Multitone Results For a multitone measurement, an audio signal comprising up to 20 sine wave test tones is generated, transmitted and analyzed.

  • Page 21: Fft Noise Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results Fig. 3-10: Multitone result table 3.4.3 FFT Noise Results For an FFT noise measurement, an audio signal consisting of several thousand sine wave test tones is generated, transmitted and analyzed. All test tones have the same level and equidistant frequencies covering the entire spectrum up to 21 kHz.

  • Page 22: Modifying Diagrams

    ® General Description R&S CMW-B400B/-B405A Measurement Results 3.4.4 Modifying Diagrams To change the appearance and contents of a diagram, press the "Diagram..." softkey. Then use the following hotkeys at the bottom of the GUI. Depending on the diagram, not all hotkeys are available. Hotkey Description "Trace ..."...
  • Page 23 ® General Description R&S CMW-B400B/-B405A Measurement Results ● Extreme (Ext), Minimum (Min), Maximum (Max): Largest or smallest "Current" value that the R&S CMW obtained since the start of the measurement. ● Standard (Std): Standard deviation of all "Current" values since the start of the mea- surement.

  • Page 24: Gui Reference

    ® GUI Reference R&S CMW-B400B/-B405A Main View 4 GUI Reference The following sections provide detailed reference information on the Graphical User Interface (GUI) and the parameters of the audio measurement. ● Main View........................24 ● Measurement and Generator Control..............27 ● Audio Measurement Settings..................28 ●...
  • Page 25 ® GUI Reference R&S CMW-B400B/-B405A Main View Scenario Audio Measurement and Generator The scenario provides an analog audio generator, a digital audio generator, an analog audio measurement and a digital audio measurement. You can generate an audio test signal via one of the generators, pass the signal through the DUT and analyze the resulting audio signal with one of the measurements.

  • Page 26: Analog/Digital Meas Tab

    ® GUI Reference R&S CMW-B400B/-B405A Main View Scenario selection via remote control Use the following command to select a scenario. Remote command: ​ R OUTe:​ A UDio:​ S CENario​ 4.1.2 Analog/Digital Meas Tab The "Analog Meas" tab and the "Digital Meas" tab are available for scenarios involving an internal audio measurement.

  • Page 27: Speech Analysis Tab

    ® GUI Reference R&S CMW-B400B/-B405A Measurement and Generator Control Query of Analog Measurement Results The results of the analog measurement can be queried via the following remote com- mands. Remote command: ​ etc. F ETCh:​ A UDio:​ M EAS<i>:​ A NALog:​ S INGletone:​ C URRent?​ ​...

  • Page 28: Audio Measurement Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Analog Generator / Digital Generator (Softkeys) Both softkeys are visible if an audio measurement tab is selected (analog or digital). They show the current states of the generators. Remote command: ​ S OURce:​ A UDio:​ G EN<i>:​ A NALog:​ S TATe​ ​...

  • Page 29: General Settings (Analog)

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings The following sections describe the "Analog Meas" and "Digital Meas" tabs of the con- figuration dialog box. Fig. 4-4: Configuration dialog box for measurements and generators ● General Settings (Analog)..................29 ● General Settings (Digital)..................31 ●...
  • Page 30 ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Routing Displays the input connector for the measured analog audio signal (AF 1 IN or AF 2 IN). This setting is not configurable. Remote command: Repetition Defines how often the measurement is repeated if it is not stopped explicitly or by a failed limit check.

  • Page 31: General Settings (Digital)

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings "AC" The DC component of the measured AF signal (including a possible DC offset of the input amplifier) is blocked. This ensures accurate meas- urements of the AC component. However, the DC component cannot be measured.

  • Page 32: Single Tone Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Routing Displays the input connector for the measured digital audio signal (SPDIF IN) and the evaluated channel (-L or -R). This setting is not configurable. Remote command: Repetition Defines how often the measurement is repeated if it is not stopped explicitly or by a failed limit check.
  • Page 33 ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Fig. 4-7: Single tone measurement settings Statistic Count Configures the statistic count for single tone measurements. This parameter can also be configured within the general settings, see ​ c hapter 4.3.1, "General Settings (Analog)", on page 29 and ​...

  • Page 34: Multitone Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Limits (Analog Measurement) This section configures upper or lower limits for most single tone results displayed in the result table. By default all limits are disabled. Remote command: ​ C ONFigure:​ A UDio:​ M EAS<i>:​ A NALog:​ S INGletone:​ L IMit​ Limits (Digital Measurement) This section configures upper or lower limits for most single tone results displayed in the result table.
  • Page 35 ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Fig. 4-8: Multitone measurement settings Statistic Count Configures the statistic count for multitone measurements. This parameter can also be configured within the general settings, see ​ c hapter 4.3.1, "General Settings (Analog)", on page 29 and ​...

  • Page 36: Fft Noise Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings 4.3.5 FFT Noise Settings The following settings are specific for FFT noise measurements. They can be configured separately for analog and digital measurements. The description applies to both. Fig. 4-9: FFT noise measurement settings Statistic Count Configures the statistic count for FFT noise measurements.

  • Page 37: Audio Generator Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Generator Settings 4.4 Audio Generator Settings To access the analog and digital generator settings, select the "Analog Meas" tab or the "Digital Meas" tab and press the "Config" hotkey. The tabs are only displayed if the cur- rently active scenario involves internal audio measurements and generators.

  • Page 38: Single Tone Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Generator Settings Signal Type Selects the type of the generated audio signal: single tone, multitone or FFT noise. Remote command: ​ S OURce:​ A UDio:​ G EN<i>:​ A NALog:​ S TYPe​ ​ S OURce:​ A UDio:​ G EN<i>:​ D IGital:​ S TYPe​ Analyzer Coupling Selects the audio measurement to which the audio generator is coupled.
  • Page 39 ® GUI Reference R&S CMW-B400B/-B405A Audio Generator Settings Fig. 4-13: Multitone generator settings Crest Factor Configures the crest factor of the generated multitone signal. "Max" All test tones of the multitone signal are generated with an initial phase of zero degrees, resulting in the maximum possible crest factor. "Low"...

  • Page 40: Fft Noise Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Generator Settings To apply changes, press the Apply button. When the dialog is closed, changes are applied automatically. Remote command: ​ S OURce:​ A UDio:​ G EN<i>:​ A NALog:​ M ULTitone:​ S TARt​ ​ S OURce:​...

  • Page 41: Speech Analysis Settings

    ® GUI Reference R&S CMW-B400B/-B405A Speech Analysis Settings Fig. 4-14: FFT noise generator settings Level Defines the level of the generated noise signal. Remote command: ​ S OURce:​ A UDio:​ G EN<i>:​ A NALog:​ F FTNoise:​ L EVel​ ​ S OURce:​ A UDio:​ G EN<i>:​ D IGital:​ F FTNoise:​ L EVel​ 4.5 Speech Analysis Settings To access the speech analysis settings, select the "Speech Analysis"...
  • Page 42 ® GUI Reference R&S CMW-B400B/-B405A Speech Analysis Settings Signaling Displays to which signaling application the speech codec is connected. Remote command: Control This section is only displayed if the speech codec is connected to AF connectors. It con- figures the A/D and D/A conversion (analog signal at AF connector to/from digital signal at speech codec and signaling application).

  • Page 43: Programming

    ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario 5 Programming The following sections provide programming examples for the audio applications. See also: "Remote Control" in the R&S CMW user manual 5.1 Audio Measurement and Generator Scenario This section provides examples for single tone, multitone and FFT noise measurements with the audio measurement and generator scenario.

  • Page 44: General Measurement Settings

    ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario 5.1.2 General Measurement Settings // ***************************************************************************** // Configure general measurement settings, independent of the signal type: // single shot measurement, no stop condition, block DC component, disable // autoranging and define maximum expected level. // ***************************************************************************** CONFigure:AUDio:MEAS:ANALog:REPetition SING CONFigure:AUDio:MEAS:ANALog:SCONdition NONE...

  • Page 45: Multitone Measurement

    ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario // ***************************************************************************** // Configure measurement limits. // ***************************************************************************** CONFigure:AUDio:MEAS:ANALog:SINGletone:LIMit 5,OFF,0,OFF,10,ON,10,ON,10,ON // ***************************************************************************** // Switch on the audio generator. Wait until the command has been executed and // query the generator state (should be ON). // ***************************************************************************** SOURce:AUDio:GEN:ANALog:STATe ON;...

  • Page 46: Fft Noise Measurement

    ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario SOURce:AUDio:GEN:ANALog:MULTitone:STARt 1 SOURce:AUDio:GEN:ANALog:MULTitone:STOP 3 // ***************************************************************************** // Check the expected signal type of the analog measurement, resulting from the // generator settings (should be MULTitone). // ***************************************************************************** CONFigure:AUDio:MEAS:ANALog:RTYPe? // ***************************************************************************** // Configure the statistic count of the measurement. // ***************************************************************************** CONFigure:AUDio:MEAS:ANALog:MULTitone:SCOunt 12 // *****************************************************************************...
  • Page 47 ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario // ***************************************************************************** // Select FFT noise as signal type and couple the generator to a measurement. // ***************************************************************************** SOURce:AUDio:GEN:ANALog:STYPe FFTNoise SOURce:AUDio:GEN:ANALog:ACOupling ANAL // ***************************************************************************** // Specify the level of the generated noise signal. // ***************************************************************************** SOURce:AUDio:GEN:ANALog:FFTNoise:LEVel 3 // *****************************************************************************...

  • Page 48: Command Reference

    ® Command Reference R&S CMW-B400B/-B405A Conventions and General Information 6 Command Reference The following sections provide detailed reference information on the remote control com- mands of the audio applications. ● Conventions and General Information..............48 ● General Settings.....................51 ● Audio Measurements....................52 ●...

  • Page 49: Reliability Indicator

    ® Command Reference R&S CMW-B400B/-B405A Conventions and General Information See also: "Statistical Results" in the R&S CMW user manual, chapter "System Overview" 6.1.4 Reliability Indicator The first value in the output arrays of FETCh...?, READ...? and CALCulate...? queries indicates the most severe error that has occurred during the measurement. Example for an output array: 0, 10.22, 10.15, 10.01, 10.29, 100 (reliability = 0, followed by 5 numeric measurement values).
  • Page 50 ® Command Reference R&S CMW-B400B/-B405A Conventions and General Information ● 19 (Call not Established): For measurements: The measurement could not be started because no signaling connection to the DUT was established. For DAU IMS service: Establishing a voice over IMS call failed. ●...

  • Page 51: General Settings

    ® Command Reference R&S CMW-B400B/-B405A General Settings The hard disk of the DAU is full or corrupt. Please execute a DAU selftest. ● 101 (Firmware Error): Indicates a firmware or software error. If you encounter this error for the first time, restart the instrument.

  • Page 52: Audio Measurements

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Manual operation: "Scenario selection via remote control" on page 26 6.3 Audio Measurements This section describes the commands of the analog and digital audio measurements. ● Measurement Control and States................52 ● General Measurement Settings................54 ●...
  • Page 53 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements See also: "Measurement Control" in the R&S CMW user manual, chapter "Remote Con- trol" See ​ Example: S ingle Tone Measurement Usage: Event Firmware/Software: V3.2.10 Manual operation: "Digital Meas (Softkey)" on page 28 FETCh:AUDio:MEAS<i>:ANALog:STATe? FETCh:AUDio:MEAS<i>:DIGital:STATe? Queries the main measurement state.

  • Page 54: General Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Return values: <MainState> OFF | RDY | RUN OFF: measurement switched off, no resources allocated, no results available (when entered after STOP...) RDY: measurement has been terminated, valid results may be available RUN: measurement running (after INITiate..., READ...), synchronization pending or adjusted, resources active or queued *RST: <SyncState>...
  • Page 55 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements CONFigure:AUDio:MEAS<i>:ANALog:RTYPe? CONFigure:AUDio:MEAS<i>:DIGital:RTYPe? Queries the currently used or expected signal type, resulting from the generator coupling. Return values: <ResultType> SINGletone | MULTitone | FFTNoise See ​ Example: M ultitone Measurement Usage: Query only Firmware/Software: V3.2.10 Manual operation: "Query of Signal Type"...
  • Page 56 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements CONFigure:AUDio:MEAS<i>:ANALog:SCOunt <StatCountSing>, <StatCountMult>, <StatCountFFTN> CONFigure:AUDio:MEAS<i>:DIGital:SCOunt <StatCountSing>, <StatCountMult>, <StatCountFFTN> Specifies the statistic counts for all audio signal types. The statistic count is equal to the number of measurement intervals per single shot. See also: "Statistical Settings" in the R&S CMW user manual, chapter "Remote Control" Parameters: <StatCountSing>...
  • Page 57 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements With enabled auto ranging, the maximum expected AF input level is set automatically according to the average level of the measured AF signal plus an appropriate overload margin. With disabled auto ranging, you must configure the maximum expected AF input level, see ​...

  • Page 58: Single Tone Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Firmware/Software: V3.2.10 CONFigure:AUDio:MEAS<i>:ANALog:FILTer:HPASs <FreqSingleTone>, <FreqMultitone>, <FreqFFTNoise> CONFigure:AUDio:MEAS<i>:DIGital:FILTer:HPASs <FreqSingleTone>, <FreqMultitone>, <FreqFFTNoise> Configures the cutoff frequency of the highpass filter for the individual audio signal types. Parameters: <FreqSingleTone> OFF | H6 | H50 | H300 OFF: highpass filter disabled H6 | H50 | H300: cutoff frequency 6 Hz, 50 Hz or 300 Hz *RST:...
  • Page 59 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements ..........59 CONFigure:​ A UDio:​ M EAS<i>:​ A NALog:​ S INGletone:​ S COunt​ ............59 CONFigure:​ A UDio:​ M EAS<i>:​ D IGital:​ S INGletone:​ S COunt​ ........59 CONFigure:​ A UDio:​ M EAS<i>:​ A NALog:​ S INGletone:​ F ILTer:​ D FRequency​ .
  • Page 60 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements CONFigure:AUDio:MEAS<i>:ANALog:SINGletone:FILTer:LPASs <Frequency> CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:LPASs <Frequency> Configures the cutoff frequency of the lowpass filter for single tone measurements. Parameters: <Frequency> OFF | LP3 | LP4 | LP15 OFF: lowpass filter disabled LP3 | LP4 | LP15: cutoff frequency 3 kHz, 4 kHz or 15 kHz *RST: See ​...
  • Page 61 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements CONFigure:AUDio:MEAS<i>:ANALog:SINGletone:FILTer:BANDpass <CenterFreq>, <Bandwidth> CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:BANDpass <CenterFreq>, <Bandwidth> Configures the center frequency and bandwidth of the bandpass filter for single tone measurements. Parameters: <CenterFreq> Range: 0 Hz to 24E+3 Hz *RST: 1000 Hz Default unit: Hz <Bandwidth>...
  • Page 62 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <THDPercEnab> OFF | ON Disables or enables the upper limit for THD results *RST: <THDPlusNUpp> Upper limit for THD + N results Range: 0 % to 100 % *RST: 0.5 % Default unit: % <THDPlusNEnab>...

  • Page 63: Single Tone Measurement Results

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <BandRmsEnab> OFF | ON Disables or enables the upper limit for bandpass level RMS results *RST: <THDPercUpp> Upper limit for THD results Range: 0 % to 100 % *RST: 0.1 % Default unit: % <THDPercEnab>...
  • Page 64 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements .............65 FETCh:​ A UDio:​ M EAS<i>:​ D IGital:​ S INGletone:​ E XTReme?​ ...........65 FETCh:​ A UDio:​ M EAS<i>:​ D IGital:​ S INGletone:​ S DEViation?​ ............65 READ:​ A UDio:​ M EAS<i>:​ D IGital:​ S INGletone:​ C URRent?​ .
  • Page 65 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <9_WeightLevRMS> Weighted level RMS result Range: 0 V to 64 V Default unit: V <10_BandLevRMS> Bandpass level RMS result Range: 0 V to 64 V Default unit: V See ​ Example: S ingle Tone Measurement Usage: Query only Firmware/Software: V3.2.10...

  • Page 66: Multitone Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <8_BandLevRMS> Bandpass level RMS result Range: 0 FS to 1 FS Default unit: FS See ​ Example: S ingle Tone Measurement Usage: Query only Firmware/Software: V3.2.10 FETCh:AUDio:MEAS<i>:ANALog:SPECtrum:CURRent? READ:AUDio:MEAS<i>:ANALog:SPECtrum:CURRent? Returns the current spectrum trace of an analog single tone measurement. Return values: ​...
  • Page 67 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements ...........67 CONFigure:​ A UDio:​ M EAS<i>:​ A NALog:​ M ULTitone:​ S COunt​ .............67 CONFigure:​ A UDio:​ M EAS<i>:​ D IGital:​ M ULTitone:​ S COunt​ ...........67 CONFigure:​ A UDio:​ M EAS<i>:​ A NALog:​ M ULTitone:​ R MODe​ .

  • Page 68: Multitone Measurement Results

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <Frequency> OFF | LP3 | LP4 | LP15 OFF: lowpass filter disabled LP3 | LP4 | LP15: cutoff frequency 3 kHz, 4 kHz or 15 kHz *RST: See ​ Example: M ultitone Measurement Firmware/Software: V3.2.10 Manual operation: "Filter"...
  • Page 69 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements .............69 FETCh:​ A UDio:​ M EAS<i>:​ A NALog:​ M ULTitone:​ C URRent?​ .............69 FETCh:​ A UDio:​ M EAS<i>:​ A NALog:​ M ULTitone:​ A VERage?​ ............69 FETCh:​ A UDio:​ M EAS<i>:​ A NALog:​ M ULTitone:​ M AXimum?​ .

  • Page 70: Fft Noise Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements FETCh:AUDio:MEAS<i>:DIGital:MULTitone:CURRent? FETCh:AUDio:MEAS<i>:DIGital:MULTitone:AVERage? FETCh:AUDio:MEAS<i>:DIGital:MULTitone:MAXimum? FETCh:AUDio:MEAS<i>:DIGital:MULTitone:SDEViation? READ:AUDio:MEAS<i>:DIGital:MULTitone:CURRent? READ:AUDio:MEAS<i>:DIGital:MULTitone:AVERage? READ:AUDio:MEAS<i>:DIGital:MULTitone:MAXimum? READ:AUDio:MEAS<i>:DIGital:MULTitone:SDEViation? Returns the current, average, maximum and standard deviation results of a digital mul- titone measurement. The measured levels are either returned as relative dB values or as absolute dBFS val- ues, depending on the configured result mode, see ​...
  • Page 71 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <StatisticCount> Range: 1 to 1000 *RST: See ​ Example: F FT Noise Measurement Firmware/Software: V3.2.10 Manual operation: "Statistic Count" on page 36 CONFigure:AUDio:MEAS<i>:ANALog:FFTNoise:FILTer:LPASs <Frequency> CONFigure:AUDio:MEAS<i>:DIGital:FFTNoise:FILTer:LPASs <Frequency> Configures the cutoff frequency of the lowpass filter for FFT noise measurements. Parameters: <Frequency>...

  • Page 72: Fft Noise Measurement Results

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <Weighting> OFF | AWEight | CCITt | CMSG OFF: weighting filter disabled AWEight: A-weighting filter CCITt: CCITT weighting filter CMSG: C-message weighting filter *RST: See ​ Example: F FT Noise Measurement Firmware/Software: V3.2.10 Manual operation: "Filter"...
  • Page 73 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <Level> Comma separated list of values, one level value (Y-value) for each trace point Range: -150 dBV to 36 dBV Default unit: dBV See ​ Example: F FT Noise Measurement Usage: Query only Firmware/Software: V3.2.10 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:FREQuency? READ:AUDio:MEAS<i>:ANALog:FFTNoise:FREQuency?

  • Page 74: Audio Generators

    ® Command Reference R&S CMW-B400B/-B405A Audio Generators FETCh:AUDio:MEAS<i>:DIGital:FFTNoise:FREQuency? READ:AUDio:MEAS<i>:DIGital:FFTNoise:FREQuency? Returns the X-values of the traces measured with a digital FFT noise measurement. Return values: ​ <Reliability> R eliability Indicator <Frequency> Comma separated list of values, one frequency value (X-value) for each trace point Range: 0 Hz to 21E+3 Hz...

  • Page 75: General Generator Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Generators Firmware/Software: V3.2.10 Manual operation: "Analog Generator / Digital Generator (Softkeys)" on page 28 6.4.2 General Generator Settings The following commands select the type of the generated signal and couple the generator to a measurement. .

  • Page 76: Multitone Generator Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Generators ..........76 SOURce:​ A UDio:​ G EN<i>:​ A NALog:​ S INGletone:​ F REQuency​ ............76 SOURce:​ A UDio:​ G EN<i>:​ D IGital:​ S INGletone:​ F REQuency​ ............76 SOURce:​ A UDio:​ G EN<i>:​ A NALog:​ S INGletone:​ L EVel​ .
  • Page 77 ® Command Reference R&S CMW-B400B/-B405A Audio Generators ............77 SOURce:​ A UDio:​ G EN<i>:​ A NALog:​ M ULTitone:​ C RESt​ ............77 SOURce:​ A UDio:​ G EN<i>:​ D IGital:​ M ULTitone:​ C RESt​ ............77 SOURce:​ A UDio:​ G EN<i>:​ A NALog:​ M ULTitone:​ L SELection​ .
  • Page 78 ® Command Reference R&S CMW-B400B/-B405A Audio Generators See ​ Example: M ultitone Measurement Firmware/Software: V3.2.10 Manual operation: "Level Handling" on page 39 SOURce:AUDio:GEN<i>:ANALog:MULTitone:TLEVel <TotalLevel> Configures or queries the total level of an analog multitone signal. For method TLEV, a setting command is executed and a query returns the configured level.
  • Page 79 ® Command Reference R&S CMW-B400B/-B405A Audio Generators SOURce:AUDio:GEN<i>:ANALog:MULTitone:TONE<no>:TDEFinition <Frequency>, <Level> Configures a selected tone of the multitone list of the analog generator. Suffix: <no> 1..20 Selects the tone Parameters: <Frequency> Frequency of the tone. All tones must have different frequencies. Range: 0 Hz to 21E+3 Hz *RST:...
  • Page 80 ® Command Reference R&S CMW-B400B/-B405A Audio Generators <Level> Level of the tone. For method SEP, the level can be set and queried. For method TLEV, the level of a setting command is ignored and a query returns the level resulting from the total multitone signal level.
  • Page 81 ® Command Reference R&S CMW-B400B/-B405A Audio Generators SOURce:AUDio:GEN<i>:DIGital:MULTitone:TDEFinition {<Frequency>, <Level>}... Configures the frequency and level of the first n tones of the multitone list of the digital generator (n = 1 to 20). Send a parameter pair for each tone to be configured: {<Frequency>, <Level>} , ..., {<Frequency>, <Level>} A query always returns the complete multitone list (20 pairs of values).

  • Page 82: Fft Noise Generator Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Generators Parameters: <StopIndex> Range: 1 to 20 *RST: See ​ Example: M ultitone Measurement Firmware/Software: V3.2.10 Manual operation: "List Section" on page 39 6.4.5 FFT Noise Generator Settings The following commands configure FFT noise signals. .

  • Page 83: Speech Analysis

    ® Command Reference R&S CMW-B400B/-B405A Speech Analysis 6.5 Speech Analysis This section describes the commands related to the "Speech Analysis" tab (scenarios with speech codec)..............83 CONFigure:​ A UDio:​ S PEech<i>:​ A NALog:​ I LEVel​ ..............83 CONFigure:​ A UDio:​ S PEech<i>:​ A NALog:​ O LEVel​ CONFigure:AUDio:SPEech<i>:ANALog:ILEVel <InputLevel>...

  • Page 84: List Of Commands

    ® List of Commands R&S CMW-B400B/-B405A List of Commands ABORt:​ A UDio:​ M EAS<i>:​ A NALog​ ........................52 ABORt:​ A UDio:​ M EAS<i>:​ D IGital​ ........................52 CONFigure:​ A UDio:​ M EAS<i>:​ A NALog:​ A RANging​ ...................56 CONFigure:​ A UDio:​ M EAS<i>:​ A NALog:​ F FTNoise:​ F ILTer:​ H PASs​ ..............71 CONFigure:​...
  • Page 85 ® List of Commands R&S CMW-B400B/-B405A CONFigure:​ A UDio:​ M EAS<i>:​ D IGital:​ S INGletone:​ F ILTer:​ D FRequency​ ............59 CONFigure:​ A UDio:​ M EAS<i>:​ D IGital:​ S INGletone:​ F ILTer:​ H PASs​ ..............60 CONFigure:​ A UDio:​ M EAS<i>:​ D IGital:​ S INGletone:​ F ILTer:​ L PASs​ ..............60 CONFigure:​...
  • Page 86 ® List of Commands R&S CMW-B400B/-B405A READ:​ A UDio:​ M EAS<i>:​ A NALog:​ S INGletone:​ A VERage?​ ................64 READ:​ A UDio:​ M EAS<i>:​ A NALog:​ S INGletone:​ C URRent?​ ................64 READ:​ A UDio:​ M EAS<i>:​ A NALog:​ S INGletone:​ E XTReme?​ ................64 READ:​...

  • Page 87: Index

    ® Index R&S CMW-B400B/-B405A Index Programming Audio generator ............43 AF connectors ..............11 Audio measurement ..........43 Analyzer Coupling Audio generator ............38 Audio generator Repetition command reference ..........48 Audio measurements .......... 30, 32 general description ............ 10 Result Mode GUI reference ............

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