Rohde & Schwarz CMW-B400B User Manual
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Rohde & Schwarz CMW-B400B User Manual

Rohde & Schwarz CMW-B400B User Manual

Audio measurements
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R&S
CMW-B400B/-B405A
Audio Measurements
User Manual
(;Úß@2)
1176.8116.02 ─ 04

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Summary of Contents for Rohde & Schwarz CMW-B400B

  • Page 1 ® R&S CMW-B400B/-B405A Audio Measurements User Manual (;Úß@2) 1176.8116.02 ─ 04...
  • 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......................8 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................
  • Page 4 ® Contents R&S CMW-B400B/-B405A 4.3.1 General Settings (Analog).....................30 4.3.2 General Settings (Digital)....................33 4.3.3 Single Tone Settings..................... 34 4.3.4 Multitone Settings......................37 4.3.5 FFT Noise Settings....................... 38 Audio Generator Settings...................40 4.4.1 General Settings......................40 4.4.2 Single Tone Settings..................... 41 4.4.3 Multitone Settings......................41 4.4.4...
  • Page 5 ® Contents R&S CMW-B400B/-B405A 6.3.6 Multitone Measurement Results..................76 6.3.7 FFT Noise Measurement Settings................78 6.3.8 FFT Noise Measurement Results................. 79 Audio Generators......................82 6.4.1 Generator Control and States..................82 6.4.2 General Generator Settings..................82 6.4.3 Single Tone Generator Settings..................83 6.4.4 Multitone Generator Settings..................84 6.4.5...
  • Page 6 ® Contents R&S CMW-B400B/-B405A User Manual 1176.8116.02 ─ 04...

  • 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: Application Sheets

    ® Preface R&S CMW-B400B/-B405A How to Read Firmware Application Chapters 1.1.2 Application Sheets This optional section provides short application examples for select issues and related background information. 1.1.3 GUI Reference The GUI reference describes the manual operation of the firmware application via the Graphical User Interface (GUI).

  • 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 3.5.10 and later of the "Audio Measurement" firmware application. Compared to version 3.2.30, it provides the following new features and changes: ●...

  • Page 10: General Description

    The "Audio Analyzer/Generator" option enhances the R&S CMW for audio tests. A sin- gle option (R&S CMW-B400B or R&S CMW-U400) provides an audio board, two ana- log and two digital audio generator instances, two analog and two digital audio mea- surement 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 For speech quality analysis of a mobile phone, the audio signal must be generated and analyzed by an external audio analyzer (e.g. R&S UPV) connected to the audio con- nectors of the R&S CMW.

  • Page 12: Test Setup For Audio Measurement And Generator

    ® General Description R&S CMW-B400B/-B405A Test Setups The Sony/Philips Digital Interface (SPDIF) connectors are in line with IEC 60958-3:2010 Consumer. Connector selection Whether AF 1 or AF 2 / SPDIF-L or SPDIF-R are used, depends on the instance (1 or...

  • 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...

  • Page 16: Af Filter Settings

    ® General Description R&S CMW-B400B/-B405A AF Filter Settings All generator and measurement settings are included in a single dialog box. To open it, select the "Analog Meas" tab or the "Digital Meas" tab and press the "Con- fig" hotkey. Configure first the used generators. Especially select a signal type and configure the measurement coupling.

  • Page 17: Measurement Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results You can use this filter stage to eliminate a possible DC component in the audio sig- nal that may cause measurement inaccuracies. ● Weighting filter The human ear is a nonlinear sensor. Its sensitivity depends on the frequency.

  • Page 18: Single Tone Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results ● Modifying Diagrams....................22 ● Using Markers......................22 ● Common View Elements..................23 3.4.1 Single Tone Results To perform a harmonics measurement, a fixed frequency sine wave audio test tone (single tone) is transmitted. Harmonics are signals at an integer multiple of the funda- mental frequency.
  • Page 19 ® General Description R&S CMW-B400B/-B405A Measurement Results Fig. 3-7: Digital single tone result table Table rows The table rows provide the following results: ● THD: Total Harmonic Distortion, ratio of the harmonic distortion voltage to the fundamen- tal wave voltage, in percent and as dB value.

  • Page 20: Multitone Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results The column "EXT" provides either minimum or maximum values, depending on the result: ● Maximum: THD, THD + N, frequency, weighted level, bandpass level ● Minimum: SINAD, SNR ● Maximum or minimum, whichever has the larger magnitude: DC level Spectrum diagram The single tone measurement provides also a spectrum diagram.

  • Page 21: Fft Noise Results

    ® General Description R&S CMW-B400B/-B405A Measurement Results Fig. 3-9: Multitone result diagram The bar graph displays the audio levels measured at the frequencies of the individual test tones. The labels of the individual bars correspond to the numbers of the test tones in the generator settings.

  • Page 22: Modifying Diagrams

    ® General Description R&S CMW-B400B/-B405A Measurement Results Fig. 3-11: FFT noise diagram The result diagram displays the measured audio level vs. the frequency. The measurement uses a Fast Fourier Transformation (FFT) compatible to the gener- ated noise signal. That means, the used sampling rate and the FFT size yield a fre- quency resolution matching the frequency spacing of the generated test tones.

  • Page 23: Common View Elements

    ® General Description R&S CMW-B400B/-B405A Measurement Results Hotkey Description "Ref. Marker" Enable or disable the reference marker and select the marker position. If sev- eral traces can be displayed, a trace can also be selected. "Marker 1 /2" Enable or disable marker 1 or 2 and define the marker position (absolute or rel- ative to the reference marker).

  • 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..............29 ●...

  • Page 25: Scenario Selection

    ® GUI Reference R&S CMW-B400B/-B405A Main View 4.1.1 Scenario Selection Selecting a scenario at the top of the main view is the first step when configuring the audio application. The available scenarios are briefly described below. For more details, see chapter 3.1, "Test...

  • Page 26: Analog/Digital Meas Tab

    ® GUI Reference R&S CMW-B400B/-B405A Main View The DUT is connected to the R&S CMW via an RF speech connection, controlled by a signaling application. Additionally, the microphone and speaker of the DUT are con- nected to the AF connectors of the R&S CMW, via electrical or acoustical coupling.

  • Page 27: Speech Analysis Tab

    ® GUI Reference R&S CMW-B400B/-B405A Main View Query of Signal Type The currently used/expected signal type can be queried via the following commands. Remote command: CONFigure:AUDio:MEAS<i>:ANALog:RTYPe? CONFigure:AUDio:MEAS<i>:DIGital:RTYPe? Query of Analog Measurement Results The results of the analog measurement can be queried via the following remote com- mands.
  • Page 28 ® GUI Reference R&S CMW-B400B/-B405A Main View Fig. 4-3: Tabs for scenario "External Analog Speech Analysis" Routing..........................28 Speech Setup........................28 Event Log........................28 Lower Part........................29 Routing This area displays the coupled master application and the used connector. "Controlled by" selects the coupled master application. This is the same setting as in the audio configuration dialog box, see "Controlled by"...

  • Page 29: Measurement And Generator Control

    ® GUI Reference R&S CMW-B400B/-B405A Measurement and Generator Control Lower Part The lower half of the tab displays information provided by the coupled master applica- tion. Which information is displayed, depends on the selected application. The information is also available in the GUI of the master application and is described in the corresponding documentation.

  • Page 30: Audio Measurement Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings This softkey is only visible if the digital audio measurement tab is selected. The softkey shows the current state of the digital audio measurement. Additional mea- surement substates may be retrieved via remote control.
  • Page 31 ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Fig. 4-5: General analog measurement settings Coupled with......................... 31 Routing..........................31 Repetition........................31 Stop Condition.......................32 Statistic Counter......................32 Input Settings........................ 32 └ Path Coupling....................32 └ Auto Ranging, Maximum Level............... 32 Coupled with Displays the coupling of the measurement to a generator. The measurement can be used standalone ("Off") or it can be coupled to an analog or digital generator.
  • Page 32 ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Single-shot is preferable if only a single measurement result is required under fixed conditions, which is typical for remote-controlled measurements. Continuous mode is suitable for monitoring the evolution of the measurement results in time and observe how they depend on the measurement configuration, which is typically done in manual control.

  • Page 33: General Settings (Digital)

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings ● Auto ranging: If auto ranging is enabled, the maximum expected AF input level is set automati- cally according to the average level of the measured AF signal plus an appropriate overload margin.

  • Page 34: Single Tone Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Repetition Defines how often the measurement is repeated if it is not stopped explicitly or by a failed limit check. ● Continuous: The measurement is continued until it is explicitly terminated; the results are periodically updated.

  • Page 35: Statistic Count

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Fig. 4-7: Single tone measurement settings Statistic Count....................... 35 Filter > Distortion Frequency..................35 Filter > Window Function....................35 Filter > Low Pass, High Pass, Weighting, Variable Bandpass........36 Limits (Analog Measurement)..................36 Limits (Digital Measurement)..................

  • Page 36: Filter > Low Pass, High Pass, Weighting, Variable

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Window Type Spectral Leakage Amplitude Accuracy Frequency Resolution Rectangular Poor Poor Best Hamming Fair Fair Good Hann (Hanning) Good Fair Good Blackman-Harris Best Good Fair Flat-Top Good Best Poor Remote command: CONFigure:AUDio:MEAS<i>:ANALog:SINGletone:FILTer:WFUNction CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:WFUNction...

  • Page 37: Multitone Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Remote command: CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:LIMit Spectrum > Off / On Enables or disables the measurement of single tone spectrum results and shows or hides the result diagram. Remote command: CONFigure:AUDio:MEAS<i>:ANALog:SPECtrum:DMODe CONFigure:AUDio:MEAS<i>:DIGital:SPECtrum:DMODe Spectrum > Display These settings configure the axes of the spectrum diagram, select which traces shall be displayed and configure the markers.

  • Page 38: Fft Noise Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Statistic Count....................... 38 Result Mode........................38 Filter..........................38 Display.......................... 38 Statistic Count Configures the statistic count for multitone measurements. This parameter can also be configured within the general settings, see chapter 4.3.1, "General Settings (Analog)",...

  • Page 39: Be Configured Within The General Settings, See Chapter 4.3.1, "General Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Measurement Settings Fig. 4-9: FFT noise measurement settings Statistic Count....................... 39 Filter..........................39 Display.......................... 39 Statistic Count Configures the statistic count for FFT noise measurements. This parameter can also be configured within the general settings, see chapter 4.3.1, "General Settings (Ana-...

  • Page 40: 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 currently active scenario involves internal audio measurements and generators.

  • Page 41: Single Tone Settings

    ® GUI Reference R&S CMW-B400B/-B405A Audio Generator Settings The used connector depends on the generator instance or on the used sub-instrument. Remote command: Signal Type Selects the type of the generated audio signal: single tone, multitone or FFT noise. Remote command: SOURce:AUDio:GEN<i>:ANALog:STYPe...
  • Page 42 ® GUI Reference R&S CMW-B400B/-B405A Audio Generator Settings Fig. 4-13: Multitone generator settings Crest Factor........................42 Level Handling......................42 List Section........................43 List..........................43 Tone List (Hotkey)......................43 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 fac- tor.
  • Page 43 ® GUI Reference R&S CMW-B400B/-B405A Audio Generator Settings List Section Specifies the start and stop index of the tone list and thus also the number of tones in the list "Count". To apply changes, press the Apply button. When the dialog is closed, changes are applied automatically.

  • Page 44: Fft Noise Settings

    ® GUI Reference R&S CMW-B400B/-B405A Speech Analysis Settings 4.4.4 FFT Noise Settings The following settings are specific for FFT noise signals. Fig. 4-14: FFT noise generator settings Level Defines the level of the generated noise signal. Remote command: SOURce:AUDio:GEN<i>:ANALog:FFTNoise:LEVel SOURce:AUDio:GEN<i>:DIGital:FFTNoise:LEVel 4.5 Speech Analysis Settings...
  • Page 45 ® GUI Reference R&S CMW-B400B/-B405A Speech Analysis Settings Output Level Full-Scale (Peak)..................45 Clock Drift........................46 High Pass........................46 Connector Indicates to which audio connectors the speech codec is connected. This setting is not configurable. It depends on the scenario and on the audio application instance.

  • Page 46: Additional Softkeys And Hotkeys

    ® GUI Reference R&S CMW-B400B/-B405A Additional Softkeys and Hotkeys Configure this setting according to the maximum voltage that you want to generate, for example the maximum voltage expected by a connected external audio analyzer. Remote command: CONFigure:AUDio:SPEech<i>:ANALog:OLEVel Clock Drift Adjusts the clock of the audio board, used for A/D and D/A conversions.

  • Page 47: 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 measure- ments with the audio measurement and generator scenario.

  • Page 48: 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.

  • Page 49: Multitone Measurement

    ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario // Configure the single tone measurement filters. // ***************************************************************************** CONFigure:AUDio:MEAS:ANALog:SINGletone:FILTer:LPASs OFF CONFigure:AUDio:MEAS:ANALog:SINGletone:FILTer:HPASs OFF CONFigure:AUDio:MEAS:ANALog:SINGletone:FILTer:WEIGhting OFF CONFigure:AUDio:MEAS:ANALog:SINGletone:FILTer:BANDpass 10000, 210 // ***************************************************************************** // 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).
  • Page 50 ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario // Configure multitone list: select separate level configuration per tone, // configure frequency and level of tone 1 to 3, correct settings for tone 2, // query resulting total level, use tone 1 to 3.

  • Page 51: Fft Noise Measurement

    ® Programming R&S CMW-B400B/-B405A Audio Measurement and Generator Scenario FETCh:AUDio:MEAS:ANALog:MULTitone:MAXimum? FETCh:AUDio:MEAS:ANALog:STATe? 5.1.5 FFT Noise Measurement The following example configures all settings specific for an FFT noise measurement, starts the audio generator, starts the audio measurement and queries the measure- ment results.

  • Page 52: 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 con- trol commands of the audio applications. ● Conventions and General Information..............52 ● General Settings..................... 56 ●...

  • Page 53: Keywords

    ® Command Reference R&S CMW-B400B/-B405A Conventions and General Information See also: "Statistical Results" in the R&S CMW user manual, chapter "System Over- view" 6.1.4 Keywords Selected keywords used in the command description are described in the following. ● Command usage If the usage is not explicitly stated, the command allows you to set parameters and query parameters.
  • Page 54 ® Command Reference R&S CMW-B400B/-B405A Conventions and General Information The measurement could not be started or continued because no trigger event was detected. ● 7 (Acquisition Error): The R&S CMW could not properly decode the RF input signal. ● 8 (Sync Error): The R&S CMW could not synchronize to the RF input signal.
  • Page 55 ® Command Reference R&S CMW-B400B/-B405A Conventions and General Information ● 30 (File not Found): The specified file could not be found. ● 40 (ARB File CRC Error): The ARB file CRC check failed. The ARB file is corrupt and not reliable.

  • Page 56: General Settings

    ® Command Reference R&S CMW-B400B/-B405A General Settings ● 102 (Unidentified Error): Indicates an error not covered by other reliability values. For troubleshooting please follow the steps described for "101 (Firmware Error)". ● 103 (Parameter Error): Indicates that the measurement could not be performed due to internal conflicting parameter settings.
  • Page 57 ® Command Reference R&S CMW-B400B/-B405A General Settings Manual operation: "Scenario selection via remote control" on page 26 ROUTe:AUDio<i>:SCENario:EDSPeech <Master> Activates the scenario "External Digital Speech Analysis" and selects the master appli- cation. Setting parameters: <Master> String parameter selecting the master To query a list of possible values, use ROUTe:AUDio<i>:...

  • Page 58: Audio Measurements

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Return values: <Scenario> AMG | EAS | EDS | MISP AMG: Audio Measurement and Generator EAS: External Analog Speech Analysis EDS: External Digital Speech Analysis MISP: Microphone- and Speaker Test *RST: <Master> String parameter indicating the master application 'No Connection' means that no master has been selected.
  • Page 59 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements ABORt:AUDio:MEAS<i>:ANALog INITiate:AUDio:MEAS<i>:DIGital STOP:AUDio:MEAS<i>:DIGital ABORt:AUDio:MEAS<i>:DIGital Starts, stops, or aborts an analog or digital audio measurement: ● INITiate... starts or restarts the measurement; the R&S CMW enters the "RUN" state. ● STOP... causes a running measurement to stop after the current evaluation period is terminated and valid results are available;...

  • Page 60: General Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements FETCh:AUDio:MEAS<i>:ANALog:STATe:ALL? FETCh:AUDio:MEAS<i>:DIGital:STATe:ALL? Queries the main measurement state and the measurement substates. Both measure- ment substates are relevant for running measurements only. Use FETCh:...:STATe? to query the main measurement state only. Use INITiate..., STOP..., ABORt... to change the measurement state.
  • Page 61 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements .............. 62 CONFigure:AUDio:MEAS<i>:ANALog:SCONdition ..............62 CONFigure:AUDio:MEAS<i>:DIGital:SCONdition ..............62 CONFigure:AUDio:MEAS<i>:ANALog:SCOunt ..............62 CONFigure:AUDio:MEAS<i>:DIGital:SCOunt ............... 62 CONFigure:AUDio:MEAS<i>:ANALog:PCOupling ..............63 CONFigure:AUDio:MEAS<i>:ANALog:ARANging ..............63 CONFigure:AUDio:MEAS<i>:ANALog:MLEVel ............64 CONFigure:AUDio:MEAS<i>:ANALog:FILTer:LPASs ............. 64 CONFigure:AUDio:MEAS<i>:DIGital:FILTer:LPASs ............64 CONFigure:AUDio:MEAS<i>:ANALog:FILTer:HPASs ............64 CONFigure:AUDio:MEAS<i>:DIGital:FILTer:HPASs ............. 64 CONFigure:AUDio:MEAS<i>:ANALog:FILTer:WEIGhting ............64 CONFigure:AUDio:MEAS<i>:DIGital:FILTer:WEIGhting...
  • Page 62 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements CONFigure:AUDio:MEAS<i>:ANALog:SCONdition <StopCondition> CONFigure:AUDio:MEAS<i>:DIGital:SCONdition <StopCondition> Specifies whether the measurement is stopped after a failed limit check or continued. OLFA means that the measurement is stopped and reaches the RDY state as soon as one of the results exceeds the limits.
  • Page 63 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <PathCoupling> AC | DC The DC component of the measured AF signal is blocked. Only the AC component is measured. Both the DC component and the AC component of the AF input signal are measured.
  • Page 64 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements CONFigure:AUDio:MEAS<i>:ANALog:FILTer:LPASs <FreqSingleTone>, <FreqMultitone>, <FreqFFTNoise> CONFigure:AUDio:MEAS<i>:DIGital:FILTer:LPASs <FreqSingleTone>, <FreqMultitone>, <FreqFFTNoise> Configures the cutoff frequency of the lowpass filter for the individual audio signal types. Parameters: <FreqSingleTone> OFF | LP3 | LP4 | LP15 OFF: lowpass filter disabled...

  • Page 65: Single Tone Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <SingleTone> OFF | AWEight | CCITt | CMSG OFF: weighting filter disabled AWEight: A-weighting filter CCITt: CCITT weighting filter CMSG: C-message weighting filter *RST: <Multitone> OFF | AWEight | CCITt | CMSG *RST: <FFTNoise>...
  • Page 66 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Manual operation: "Statistic Count" on page 35 CONFigure:AUDio:MEAS<i>:ANALog:SINGletone:FILTer:DFRequency <DistortionFreq> CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:DFRequency <DistortionFreq> Specifies the distortion frequency for single tone measurements (fundamental fre- quency of the AF signal). The setting command is only relevant if the measurement is not coupled to an audio generator.
  • Page 67 ® 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: Example: Single Tone Measurement Firmware/Software: V3.2.10 Manual operation: "Filter >...
  • Page 68 ® 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 69 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <THDPercUpp> Upper limit for THD results Range: 0 % to 100 % *RST: 0.1 % Default unit: % <THDPercEnab> OFF | ON Disables or enables the upper limit for THD results *RST: <THDPlusNUpp>...
  • Page 70 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <BandRmsUpp> Upper limit for bandpass level RMS results Range: 0 FS to 1 FS *RST: 1 FS Default unit: FS <BandRmsEnab> OFF | ON Disables or enables the upper limit for bandpass level RMS...

  • Page 71: Single Tone Measurement Results

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <DiagramMode> OFF | ON OFF: Do not evaluate the results and hide the diagram ON: Evaluate the results and show the diagram *RST: Example: Single Tone Measurement Firmware/Software: V3.2.20 Manual operation: "Spectrum > Off / On"...
  • Page 72 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements The ranges indicated below apply to all results except standard deviation results. The minimum for standard deviation results equals 0. The maximum equals the width of the indicated range divided by two. Exceptions are explicitly stated.
  • Page 73 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements READ:AUDio:MEAS<i>:DIGital:SINGletone:EXTReme? READ:AUDio:MEAS<i>:DIGital:SINGletone:SDEViation? Returns the current, average, extreme and standard deviation results of a digital single tone measurement. The ranges indicated below apply to all results except standard deviation results. The minimum for standard deviation results equals 0. The maximum equals the width of the indicated range divided by two.

  • Page 74: Multitone Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <Current> Comma separated list of values, one level value (Y-value) for each trace point First value corresponds to 0 Hz, last value to 24 kHz Range: -150 dBV to 36 dBV Default unit: dBV...
  • Page 75 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <StatisticCount> Range: 1 to 1000 *RST: Example: Multitone Measurement Firmware/Software: V3.2.10 Manual operation: "Statistic Count" on page 38 CONFigure:AUDio:MEAS<i>:ANALog:MULTitone:RMODe <ResultMode> CONFigure:AUDio:MEAS<i>:DIGital:MULTitone:RMODe <ResultMode> Selects whether the multitone results are provided as absolute levels (dBV or dBFS) or as relative levels (dB).

  • Page 76: Multitone Measurement Results

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements Parameters: <Frequency> OFF | H6 | H50 | H300 OFF: highpass filter disabled H6 | H50 | H300: cutoff frequency 6 Hz, 50 Hz or 300 Hz *RST: ANALog = OFF, DIGital = H6...
  • Page 77 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements FETCh:AUDio:MEAS<i>:ANALog:MULTitone:CURRent? FETCh:AUDio:MEAS<i>:ANALog:MULTitone:AVERage? FETCh:AUDio:MEAS<i>:ANALog:MULTitone:MAXimum? FETCh:AUDio:MEAS<i>:ANALog:MULTitone:SDEViation? READ:AUDio:MEAS<i>:ANALog:MULTitone:CURRent? READ:AUDio:MEAS<i>:ANALog:MULTitone:AVERage? READ:AUDio:MEAS<i>:ANALog:MULTitone:MAXimum? READ:AUDio:MEAS<i>:ANALog:MULTitone:SDEViation? Returns the current, average, maximum and standard deviation results of an analog multitone measurement. The measured levels are either returned as relative dB values or as absolute dBV val- ues, depending on the configured result mode, see CONFigure:AUDio:MEAS<i>:...

  • Page 78: Fft Noise Measurement Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Measurements The ranges indicated below apply to all results except standard deviation results. The minimum for standard deviation results equals 0. The maximum equals the width of the indicated range divided by two. Exceptions are explicitly stated.

  • Page 79: Fft Noise 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: Example: FFT Noise Measurement Firmware/Software: V3.2.10 Manual operation: "Filter"...
  • Page 80 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements ............80 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:CURRent? ............80 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:AVERage? ............. 80 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:MAXimum? ............80 READ:AUDio:MEAS<i>:ANALog:FFTNoise:CURRent? ............80 READ:AUDio:MEAS<i>:ANALog:FFTNoise:AVERage? ............80 READ:AUDio:MEAS<i>:ANALog:FFTNoise:MAXimum? ...........80 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:FREQuency? ............ 80 READ:AUDio:MEAS<i>:ANALog:FFTNoise:FREQuency? ............81 FETCh:AUDio:MEAS<i>:DIGital:FFTNoise:CURRent? ............81 FETCh:AUDio:MEAS<i>:DIGital:FFTNoise:AVERage? ............81 FETCh:AUDio:MEAS<i>:DIGital:FFTNoise:MAXimum? ............81 READ:AUDio:MEAS<i>:DIGital:FFTNoise:CURRent? ............81 READ:AUDio:MEAS<i>:DIGital:FFTNoise:AVERage? ............81 READ:AUDio:MEAS<i>:DIGital:FFTNoise:MAXimum?
  • Page 81 ® Command Reference R&S CMW-B400B/-B405A Audio Measurements <Frequency> Comma separated list of values, one frequency value (X-value) for each trace point Range: 0 Hz to 24E+3 Hz Default unit: Hz Example: FFT Noise Measurement Usage: Query only Firmware/Software: V3.2.10 FETCh:AUDio:MEAS<i>:DIGital:FFTNoise:CURRent? FETCh:AUDio:MEAS<i>:DIGital:FFTNoise:AVERage?

  • Page 82: Audio Generators

    ® Command Reference R&S CMW-B400B/-B405A Audio Generators 6.4 Audio Generators This section describes the commands of the analog and digital audio generators. ● Generator Control and States................. 82 ● General Generator Settings..................82 ● Single Tone Generator Settings................83 ● Multitone Generator Settings..................

  • Page 83: Single Tone Generator Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Generators SOURce:AUDio:GEN<i>:ANALog:STYPe <SignalType> SOURce:AUDio:GEN<i>:DIGital:STYPe <SignalType> Selects the type of the generated audio signal. Parameters: <SignalType> SINGletone | MULTitone | FFTNoise *RST: SING Example: Single Tone Measurement Firmware/Software: V3.2.10 Manual operation: "Signal Type" on page 41 SOURce:AUDio:GEN<i>:ANALog:ACOupling <Analyzer>...

  • Page 84: Multitone Generator Settings

    ® Command Reference R&S CMW-B400B/-B405A Audio Generators Firmware/Software: V3.2.10 Manual operation: "Frequency" on page 41 SOURce:AUDio:GEN<i>:ANALog:SINGletone:LEVel <Level> Specifies the level of the analog single tone signal as effective voltage (RMS aver- aged). Parameters: <Level> Range: 0 V to 5 V...
  • Page 85 ® Command Reference R&S CMW-B400B/-B405A Audio Generators SOURce:AUDio:GEN<i>:ANALog:MULTitone:CRESt <CrestFactor> SOURce:AUDio:GEN<i>:DIGital:MULTitone:CRESt <CrestFactor> Configures the crest factor of the generated multitone signal. Parameters: <CrestFactor> MAX | LOW MAX: maximum possible crest factor LOW: low crest factor *RST: Example: Multitone Measurement Firmware/Software: V3.2.10 Manual operation: "Crest Factor"...
  • Page 86 ® Command Reference R&S CMW-B400B/-B405A Audio Generators For method configuration, see SOURce:AUDio:GEN<i>:ANALog:MULTitone: LSELection. Parameters: <TotalLevel> Range: 0 V to 5 V *RST: Default unit: V Example: Multitone Measurement Firmware/Software: V3.2.10 Manual operation: "Level Handling" on page 42 SOURce:AUDio:GEN<i>:DIGital:MULTitone:TLEVel <TotalLevel> Configures or queries the total level of a digital multitone signal.
  • Page 87 ® 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 88 ® Command Reference R&S CMW-B400B/-B405A Audio Generators SOURce:AUDio:GEN<i>:ANALog:MULTitone:TDEFinition {<Frequency>, <Level>}... Configures the frequency and level of the first n tones of the multitone list of the analog generator (n = 1 to 20). Send a parameter pair for each tone to be configured: {<Frequency>, <Level>}...
  • Page 89 ® 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 90: Fft Noise Generator Settings

    ® Command Reference R&S CMW-B400B/-B405A Speech Analysis 6.4.5 FFT Noise Generator Settings The following commands configure FFT noise signals.............. 90 SOURce:AUDio:GEN<i>:ANALog:FFTNoise:LEVel ............... 90 SOURce:AUDio:GEN<i>:DIGital:FFTNoise:LEVel SOURce:AUDio:GEN<i>:ANALog:FFTNoise:LEVel <Level> Specifies the level of an analog FFT noise signal. Parameters: <Level> Range: 0 V to 5 V...
  • Page 91 ® Command Reference R&S CMW-B400B/-B405A Speech Analysis For each entry, three parameters are returned, from oldest to latest entry: {<Time- stamp>, <Category>, <Description>} , {<Timestamp>, <Category>, <Descrip- entry 1 tion>} , ... entry 2 Return values: <Timestamp> Timestamp of the entry as string in the format "hh:mm:ss"...
  • Page 92 ® Command Reference R&S CMW-B400B/-B405A Speech Analysis CONFigure:AUDio:SPEech<i>:ANALog:OLEVel <OutputLevel> Configures the D/A conversion for analog speech scenarios with an output signal at the AF connector. Parameters: <OutputLevel> Analog output signal peak voltage corresponding to digital signal full-scale value Range: 0 V to 7 V *RST: 0.3 V...

  • Page 93: List Of Commands

    ® List of Commands R&S CMW-B400B/-B405A List of Commands ABORt:AUDio:MEAS<i>:ANALog........................59 ABORt:AUDio:MEAS<i>:DIGital........................59 CONFigure:AUDio:MEAS<i>:ANALog:ARANging................... 63 CONFigure:AUDio:MEAS<i>:ANALog:FFTNoise:FILTer:HPASs..............79 CONFigure:AUDio:MEAS<i>:ANALog:FFTNoise:FILTer:LPASs..............78 CONFigure:AUDio:MEAS<i>:ANALog:FFTNoise:FILTer:WEIGhting.............. 79 CONFigure:AUDio:MEAS<i>:ANALog:FFTNoise:SCOunt................78 CONFigure:AUDio:MEAS<i>:ANALog:FILTer:HPASs..................64 CONFigure:AUDio:MEAS<i>:ANALog:FILTer:LPASs..................64 CONFigure:AUDio:MEAS<i>:ANALog:FILTer:WEIGhting................64 CONFigure:AUDio:MEAS<i>:ANALog:MLEVel....................63 CONFigure:AUDio:MEAS<i>:ANALog:MULTitone:FILTer:HPASs..............75 CONFigure:AUDio:MEAS<i>:ANALog:MULTitone:FILTer:LPASs..............75 CONFigure:AUDio:MEAS<i>:ANALog:MULTitone:FILTer:WEIGhting............76 CONFigure:AUDio:MEAS<i>:ANALog:MULTitone:RMODe................75 CONFigure:AUDio:MEAS<i>:ANALog:MULTitone:SCOunt................74 CONFigure:AUDio:MEAS<i>:ANALog:PCOupling..................62 CONFigure:AUDio:MEAS<i>:ANALog:REPetition...................61 CONFigure:AUDio:MEAS<i>:ANALog:RTYPe?....................61 CONFigure:AUDio:MEAS<i>:ANALog:SCONdition..................62...
  • Page 94 ® List of Commands R&S CMW-B400B/-B405A CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:DFRequency............66 CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:HPASs..............67 CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:LPASs..............66 CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:WEIGhting..............67 CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:FILTer:WFUNction.............66 CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:LIMit...................69 CONFigure:AUDio:MEAS<i>:DIGital:SINGletone:SCOunt................65 CONFigure:AUDio:MEAS<i>:DIGital:SPECtrum:DMODe................70 CONFigure:AUDio:SPEech<i>:ANALog:FILTer:HPASs..................92 CONFigure:AUDio:SPEech<i>:ANALog:ILEVel....................91 CONFigure:AUDio:SPEech<i>:ANALog:OLEVel.....................92 CONFigure:AUDio:SPEech<i>:CDRift......................92 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:AVERage?................80 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:CURRent?................80 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:FREQuency?................80 FETCh:AUDio:MEAS<i>:ANALog:FFTNoise:MAXimum?................80 FETCh:AUDio:MEAS<i>:ANALog:MULTitone:AVERage?................77 FETCh:AUDio:MEAS<i>:ANALog:MULTitone:CURRent?................77 FETCh:AUDio:MEAS<i>:ANALog:MULTitone:MAXimum?................77 FETCh:AUDio:MEAS<i>:ANALog:MULTitone:SDEViation?................77 FETCh:AUDio:MEAS<i>:ANALog:SINGletone:AVERage?................71 FETCh:AUDio:MEAS<i>:ANALog:SINGletone:CURRent?................71 FETCh:AUDio:MEAS<i>:ANALog:SINGletone:EXTReme?................
  • Page 95 ® List of Commands R&S CMW-B400B/-B405A READ:AUDio:MEAS<i>:ANALog:MULTitone:MAXimum?................77 READ:AUDio:MEAS<i>:ANALog:MULTitone:SDEViation?................77 READ:AUDio:MEAS<i>:ANALog:SINGletone:AVERage?................71 READ:AUDio:MEAS<i>:ANALog:SINGletone:CURRent?................71 READ:AUDio:MEAS<i>:ANALog:SINGletone:EXTReme?................71 READ:AUDio:MEAS<i>:ANALog:SINGletone:SDEViation?................71 READ:AUDio:MEAS<i>:ANALog:SPECtrum:CURRent?.................73 READ:AUDio:MEAS<i>:DIGital:FFTNoise:AVERage?..................81 READ:AUDio:MEAS<i>:DIGital:FFTNoise:CURRent?..................81 READ:AUDio:MEAS<i>:DIGital:FFTNoise:FREQuency?................81 READ:AUDio:MEAS<i>:DIGital:FFTNoise:MAXimum?................... 81 READ:AUDio:MEAS<i>:DIGital:MULTitone:AVERage?.................. 77 READ:AUDio:MEAS<i>:DIGital:MULTitone:CURRent?.................. 77 READ:AUDio:MEAS<i>:DIGital:MULTitone:MAXimum?................. 77 READ:AUDio:MEAS<i>:DIGital:MULTitone:SDEViation?................77 READ:AUDio:MEAS<i>:DIGital:SINGletone:AVERage?................. 72 READ:AUDio:MEAS<i>:DIGital:SINGletone:CURRent?................. 72 READ:AUDio:MEAS<i>:DIGital:SINGletone:EXTReme?................73 READ:AUDio:MEAS<i>:DIGital:SINGletone:SDEViation?................73 READ:AUDio:MEAS<i>:DIGital:SPECtrum:CURRent?................... 74 ROUTe:AUDio<i>:SCENario:AMGenerator.....................56...
  • Page 96 ® List of Commands R&S CMW-B400B/-B405A SOURce:AUDio:GEN<i>:DIGital:SINGletone:FREQuency................83 SOURce:AUDio:GEN<i>:DIGital:SINGletone:LEVel..................84 SOURce:AUDio:GEN<i>:DIGital:STATe......................82 SOURce:AUDio:GEN<i>:DIGital:STYPe......................83 STOP:AUDio:MEAS<i>:ANALog........................58 STOP:AUDio:MEAS<i>:DIGital........................59 User Manual 1176.8116.02 ─ 04...

  • Page 97: Index

    ® Index R&S CMW-B400B/-B405A Index AF connectors ..............11 Output Level Full-Scale Analyzer Coupling Audio measurements ..........45 Audio generator ............41 Audio generator command reference ............ 52 Path Coupling general description ............. 10 Audio measurements ..........32 GUI reference ............. 24 Programming programming ...............

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