NI-RFSG软前面板帮助手册.pdf

NI-RFSG Soft Front Panel2023-03-01NI-RFSG Soft Front PanelContentsNI-RFSG Soft Front Panel Help.3NI-RFSG SFP Environment.3Generating a CW Tone in the NI-RFSG SFP.5Importing Data to the NI-RFSG SFP for Generation.7Modeling l/Q Impairments in the NI-RFSG SFP.8Supported Data File Formats in the NI-RFSG SFP.10Saving a Configuration.11/NI-RFSG Soft Front PanelNI-RFSG Soft Front Pane HepJanuary 2015,373662C-01This help file contains information about using the NI-RFSG Soft Front Panel(SFP)to interactively control your Nl RF signal generator.The NI-RFSG SFP uses the NI-RFSG driver software for LabVIEW to perform standard,built-in RF signal generator operations.This help file includes information about the SFP environment and details about how to generate a CW tone,import data,and model l/Q impairments.For information about developing applications outside the SFP using the NI-RFSG driver software,refer to Programming Reference.Tip The SFP is compatible with touch-enabledscreens.In addition to this help file,you can learn more about using the NI-RFSG SFP by launching the SFP and selecting HelpShow Context Help or by pressing.With the context help window open,move the cursor over an item to display additional help.For more information about additional NI-RFSG documentation,refer to Related Documentation.To comment on National Instruments documentation,refer to the National Instruments website.2012-2015 National Instruments.All rights reserved.NI-RFSG SFP EnvironmentSimilarto stand-alone RF signal generators,the NI-RFSG SFP controls your RF device,which generates data.However,because the SFP operates on the PC,it provides additional processing,storage,and display capabilities.You can open multiple instances of the SFP to interact with more than one device.Each instance of the SFP opens as a separate application window and interacts with one device.You can access the NI-RFSG SFP at StartAll ProgramsNational lnstrumentsNI-RFSGNI-RFSG Soft Front Panel.The SFP launches at the minimum application window size.To resize the application window,click the National InstrumentsNI-RFSG Soft Front PanelMaximize button in the upper right corner of the window or click and drag a corner of the window.The following figure illustrates the elements of the NI-RFSG SFP environment.71.MenuUse the NI-RFSG SFP menus to perform the following actions:Use the File menu options to open new instances of the NI-RFSG SFP,set up and print the Display Window,save and load configuration files,and exit the SFP.Use the Device menu to open and close a device session.Use the Help menu to access information about the SFP,help for the SFP,and device-specific help.2.Display WindowThe upper pane of the Display Window shows information about the RF device in session.The upper pane includes a data entry field that appears when you click instrument control buttons for which you can specify instrument settings.Note Some parameter values are coerced to a value supported by the current device.Actual(coerced)values display in the Device 4 NI-RFSG Soft Front PanelConfiguration Area,while the data entry field and softkey continue to display the desired value.3.Device Configuration AreaThe middle pane of the Display Window shows the configuration settings of the current device session and parameters of the current generation.In Arb mode,the lower pane can display a graphical preview of the data.4.Instrument Control ButtonsUse the instrument control buttons to select softkey menus where you can configure signals and specify device,system,and display options.You can also use instrument control buttons to save and recall configurations for signal generation and to print the current Display Window.Use the instrument control buttons as you would the buttons on stand-alone RF signal generators.5.Softkey MenuUse the softkey menu to configure a generation and specify device,system,and display settings.The softkey menu is dynamic and changes according to the selected instrument control button.The symbol on a softkey indicates additional options are available by clicking that softkey.Click the Return softkey to return to the previous softkey menu.Use the softkeys below the Return softkey to view additional softkeys related to the current softkey menu.6.Keypad and KnobUse the keypad and knob to enter values for device settings as you would on stand-alone RF signal generators.You can also use your computer keyboard to enter values for device settings,and you can use the mouse scroll wheel to move the knob.7.Status BarThe status bar displays status,warning,and error information about the current device session.Click the Clear button to clear warnings from the status bar.The SFP automatically clears resolved errors from the status bar.Generating a CW Tone in the NI-RFSG SFPNote To use the NI-RFSG SFP with your device,you must first configure the device in Measurement&Automation Explorer(MAX).National InstrumentsNI-RFSG Soft Front PanelRefer to the getting started guide for your device for information about configuring and associating your device(s)in MAX.1.Open the NI-RFSG SFP by selecting StartAll ProgramsNational lnstrumentsNI-RFSGNI-RFSG Soft Front Panel.2.If you have more than one device configured in MAX,select a device in the Select Device dialog box and click OK.If you have only one device configured,the SFP automatically opens a session forthat device.If you do not have devices configured for use with the SFP,a message displays to indicate no RF devices are available.Q Tip You can run multiple instances of theNI-RFSG SFP if you have multiple devices installed in your chassis.Select File New Window to open another instance of the SFP.Each new instance of the SFP opens in a separate application window.3.Click the RF On/Off button to generate the RF signal at the RF output terminal of your device.4.Adjust the frequency.1.Click the Freq button to display the Frequency softkey menu.2.Use the keypad,knob,keyboard,or mouse to specify a frequency.Note Some parameter values are coerced to a value supported by the current device.Actual(coerced)values display in the Device Configuration Area,while the data entry field and softkey continue to display the desired value.5.Adjust the power level.1.Click the Level button to display the Level softkey menu.2.Use the keypad,knob,keyboard,or mouse to specify a power level.,Note The NI-RFSG SFP interprets the powerlevel as average power.6 NI-RFSG Soft Front Panel6.Monitor your device to view the generated signal.Importing Data to the NI-RFSG SFP for GenerationNote To use the NI-RFSG SFP with your device,you must first configure the device in Measurement&Automation Explorer(MAX).Refer to the getting started guide for your device for information about configuring and associating your device(s)in MAX.1.Open the NI-RFSG SFP by selecting StartAll ProgramsNational lnstrumentsNI-RFSGNI-RFSG Soft Front Panel.2.If you have more than one device configured in MAX,select a device in the Select Device dialog box and click OK.If you have only one device configured,the SFP automatically opens a session forthat device.If you do not have devices configured for use with the SFP,a message displays to indicate no RF devices are available.Q Tip Click the Preset button to return theSFP to the default settings if you previously generated a CW tone or changed any settings.3.Select the arbitrary waveform mode.1.Click the Mode button to display the Mode softkey menu.2.Click the Arb softkey to select arbitrary waveform mode and display the Arb softkey menu.4.Load a waveform file.1.In the Arb softkey menu,click the Load IQ File softkey.2.Click Load Text File to open the Import Text File dialog box.3.Navigate to the PublicDocumentsNational Instr umentsNI-RFSG Soft Front Pane1examplesWaveform s folder.4.Select the TwoTone_IQ100MHz_2D.txt text file and click OK.National InstrumentsNI-RFSG Soft Front Panel5.In the Import parameters dialog box,specify the file and data information.6.Click OK to import the data.7.Click Return to return to the Arb softkey menu.5.Click the RF On/Off button to transmit the RF signal to your device.6.(Optional)Preview the signal on the SFP.1.Click the Preview Data softkey to display a preview of the signal on the SFP.2.Click the CCDF softkey to display a CCDF graph of the loaded waveform.Tip Adjust the bottom display areasplitter bar to change the size of the graph.Related TopicsSupported Data File Formats in the NI-RFSG SFPRefer to this topic for more information about importing data to the SFP.Modeling l/Q Impairments in the NI-RFSG SFPYou can use the NI-RFSG SFP to model l/Q impairments on imported signals.You can model l/Q impairments on only the Nl 5673/5673E vector signal generator.1.Import signals for which you want to model l/Q impairments.2.Enable l/Q impairments.1.In the Arb softkey menu,click the IQ Impairments softkey to display the IQ Impairments softkey menu.2.Click the Impairments softkey to enable l/Q impairments.3.Specify l/Q impairments.I OffsetSpecifies the l-signal DC offset,in percent(%).The arbitrary waveform generator(AWG)offset is the specified percentage of the AWG peak power level.Actual AWG signal offset is equal to the l/Q modulator 8 NI-RFSG Soft Front Paneloffset correction plus the value specified in this parameter.A negative offset shifts the locus of the symbol coordinates left of center in the l/Q plane.A positive offset shifts the locus of the coordinates right of center in the l/Q plane.Valid offset range is-100%to 100%.Q OffsetSpecifies the Q-signal DC offset,in percent(%).The AWG offset is the specified percentage of the AWG peak power level.Actual AWG signal offset is equal to the l/Q modulator offset correction plus the value specified in this parameter.A negative offset shifts the locus of the symbol coordinates lower in the l/Q plane.A positive offset shifts the locus of the coordinates higher in the l/Q plane.Valid offset range is-100%to 100%.Gain ImbalanceSpecifies the gain imbalance of the l/Q modulator(I versus Q),in dB.l/Q gain imbalance is the difference in scaling between the I and Q components.A positive value indicates that the I component has been impaired.A negative value indicates that the Q component has been impaired.Valid gain imbalance range is-6 dB to 6 dB.IQ SkewSpecifies the adjustment of the phase angle between the I and Q vectors,in degrees().If the skew is zero,the phase angle is 90O.A negative skew twists the constellation to the left.A positive skew twists the constellation to the right.Valid skew range is-30 to 30.Note The up,down,left,and right specifications for the effects of l/Q impairments on the data assume that the data is displayed on an l/Q graph where I is the x-axis and Q is the y-axis.4.(Optional)Preview the signal on the SFP.1.Click the Preview Data softkey on the Arb softkey menu to display a preview of the signal on the SFP.2.Click the I vs Q softkey to plot the I and Q signals.Related TopicsImporting Data to the NI-RFSG SFP for GenerationRefer to this topic for more information about importing signals.National InstrumentsNI-RFSG Soft Front PanelOnboard Signal Processing(OSP)on National Instruments Signal GeneratorsRefer to this page for more information about l/Q impairments.Supported Data File Formats in the NI-RFSG SFPYou can use the NI-RFSG SFP to import data from a file for generation.The SFP supports text and TDMS waveform file formats.Use Nl RF Toolkit Soft Front Panels to generate TDMS files that are supported by the NI-RFSG SFP.Text FilesFormat data in text files as two columns of l/Q data separated by a delimiter,or format it as a single row of interleaved l/Q data with elements separated by a delimiter.The Import parameters dialog box for text files includes the following options:File Information Column DelimiterSpecifies the type of delimiter the file usestab,comma,orsemicolon.Decimal PointSpecifies the type of character the file uses for a decimal pointsystem-defined,period,or comma.Offset(bytes)Specifies the number of bytes(characters)to ignore at the beginning of the file to account for a header.Data Array TypeSpecifies whetherthe data is formatted as 2D,which corresponds to two columns of l/Q data,or ID Interleaved,which corresponds to a single row of interleaved l/Q data.IQ Rate(S/s)Specifies the l/Q rate of the data.The default value is 100 MS/s.Swap I&QEnables noninverse phase rotation of the l/Q signal by swapping the I and Q values in the data.10 NI-RFSG Soft Front PanelTDMS FilesWhen you import a TDMS file,the SFP populates the waveform name,headroom,and l/Q rate values from the corresponding properties in the TDMS file.Note The SFP only supports TDMS files that are generated by Nl RF Toolkit SFPs.Related TopicsSaving a ConfigurationRefer to this topic for more information about saving and recalling configurations using TDMS.Saving a ConfigurationThe NI-RFSG Soft Front Panel allows you to save all the current settings,and to later recall them to restore the Soft Front Panel to a predefined state.The NI-RFSG SFP uses the TDMS file type for this purpose.Although the configuration is stored in binary format,you can open and read TDMS files using the Nl LabVIEW TDMS viewer,shown in the following figure,or the TDM Excel Add-In for Microsoft Excel.National InstrumentsNI-RFSG Soft Front PanelWhen you view a configuration file in the Nl LabVIEW TDMS Viewer,parameter values are stored in the StateDB group,and any waveform data loaded in Arb mode is stored in the Waveforms group.To view the waveform data,click the Values(table)tab or the Analog Values(graph)tab.Click the Save button to save measurement and acquisition configurations in the TDMS file format.Click the Save to File softkey to save to a TDMS file,or click one of the Quick Save softkeys to allow for one click save/recall.Click the Recall button to recall a previously saved configuration.To save your current Soft Front Panel settings,complete the following steps:1.Click the Save button or select FileSave Configuration.2.If you clicked on the Save button,click the Save to File softkey,otherwise,skip to step 3.3.Specify a path and file name in the dialog box.4.Click OK.To apply a Soft Front Panel configuration that was previously saved,complete the following steps:1.Click the Recall button or select FileRecall Configuration.2.If you clicked the Recall button,click the Recall from File softkey,otherwise,skip to step 3.3.In the file dialog box,navigate to the configuration that you want to recall.4.Click OK.上 2023 National Instruments Corporation.