Scopes and Data Logging

Display and record data

DSP Scopes visualize your streaming/real-time data using hardware-inspired interfaces. Use measurements, cursors, triggers, and masks to visually inspect and analyze streaming data. In MATLAB^®, you can visualize streaming data using scope System objects. In Simulink^®, you can visualize signals using scope blocks or apps, or you can save data to MATLAB with the Time Scope or To Workspace blocks.

Blocks

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Scopes

Array Plot	Display vectors or arrays
Display	Show value of input
Spectrum Analyzer	Display frequency spectrum
Time Scope	Display and analyze signals generated during simulation and log signal data to MATLAB

Data Logging

To Workspace	Write data to workspace
Triggered To Workspace	Write input sample to MATLAB workspace when triggered
Spectrum Analyzer	Display frequency spectrum
Time Scope	Display and analyze signals generated during simulation and log signal data to MATLAB

Functions

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Scopes

`timescope`	Display time-domain signals
`dsp.SpectrumAnalyzer`	Display frequency spectrum of time-domain signals
`dsp.ArrayPlot`	Display vectors or arrays
`dsp.LogicAnalyzer`	Visualize, measure, and analyze transitions and states over time
`dsp.DynamicFilterVisualizer`	Display time-varying magnitude response of digital filters
`dsp.MatrixViewer`	Visualize matrix data

Time Scope

`timescope`	Display time-domain signals
`TimeScopeConfiguration`	Control Scope block appearance and behavior
`generateScript`	Generate MATLAB script to create scope with current settings

Spectrum Analyzer

`dsp.SpectrumAnalyzer`	Display frequency spectrum of time-domain signals
`SpectrumAnalyzerConfiguration`	Configure Spectrum Analyzer block
`isNewDataReady`	Check spectrum analyzer for new data
`generateScript`	Generate MATLAB script to create scope with current settings
`getSpectrumData`	Save spectrum data shown in spectrum analyzer
`getSpectralMaskStatus`	Get test results of current spectral mask
`getMeasurementsData`	Get the current measurement data displayed on the spectrum analyzer

Logic Analyzer

`dsp.LogicAnalyzer`	Visualize, measure, and analyze transitions and states over time
`addCursor`	Add cursor to Logic Analyzer
`addDivider`	Add divider to Logic Analyzer
`addWave`	Add wave to Logic Analyzer
`deleteCursor`	Delete Logic Analyzer cursor
`deleteDisplayChannel`	Delete Logic Analyzer channel
`getCursorInfo`	Return settings for Logic Analyzer cursor
`getCursorTags`	Return all Logic Analyzer cursor tags
`getDisplayChannelInfo`	Return settings for Logic Analyzer display channel
`getDisplayChannelTags`	Return all Logic Analyzer display channel tags
`modifyCursor`	Modify properties of Logic Analyzer cursor
`modifyDisplayChannel`	Modify properties of Logic Analyzer display channel
`moveDisplayChannel`	Move position of Logic Analyzer display channel

Array Plot

`dsp.ArrayPlot`	Display vectors or arrays
`ArrayPlotConfiguration`	Control Array Plot block appearance and behavior from MATLAB
`generateScript`	Generate MATLAB script to create scope with current settings

Matrix Viewer

`dsp.MatrixViewer`	Visualize matrix data
`setCursorDataLabels`	Customize data labels for cursor measurements

Dynamic Filter Visualizer

`dsp.DynamicFilterVisualizer`	Display time-varying magnitude response of digital filters
`step`	Display time-varying magnitude response

Logging

dsp.SignalSink Log simulation data in buffer

Apps

Logic Analyzer

Visualize, measure, and analyze transitions and states over time

Topics

Scope Configuration

Control Scope Blocks Programmatically (Simulink)

This example shows how to control scopes with programming scripts.

Common Scope Block Tasks

Step-by-step procedures of common scope tasks, including logging data, sharing scope images, and display manipulation.

Configure Spectrum Analyzer

Customize Spectrum Analyzer properties, set up spectral masks, and use measurement tools.

Configure Array Plot Block

Customize Array Plot properties and use measurement tools.

Configure Array Plot MATLAB Object

Customize dsp.ArrayPlot properties and use measurement tools.

Configure Time Scope Block

Customize scope properties and use measurement tools.

Configure Time Scope MATLAB Object

Customize timescope properties and use measurement tools.

Configure Logic Analyzer

Adjust setting in the Logic Analyzer.

Scope Workflows

Display Time-Domain Data

Display signals in the time domain.

Display Frequency-Domain Data in Spectrum Analyzer

This example shows how you can use a Spectrum Analyzer block to display the frequency content of two frame-based signals simultaneously.

Visualize Central Limit Theorem in Array Plot

This example shows how to use and configure the dsp.ArrayPlot System object to visualize the Central Limit Theorem.

Inspect and Measure Transitions Using the Logic Analyzer

Learn the basics of the Logic Analyzer.

Time Scope Measurements

This example shows how to measure performance characteristics of a pulse width modulated sinusoid.

Spectrum Analyzer Measurements

This example shows how to perform measurements using the Spectrum Analyzer block.

Data Logging

Sample- and Frame-Based Concepts

Introduction to real-world sample- and frame-based signals, and how to model those signals in MATLAB and Simulink.

Inspect Sample and Frame Rates in Simulink

Learn how to determine the sample and frame rates of signals in your model.

Export Signal Data Using Signal Logging (Simulink)

To capture signal data from a simulation, you can use signal logging. Mark the signals that you want to log and enable signal logging for the model.

Configure a Signal for Logging (Simulink)

Mark the signals that you want to log simulation data for.

Enable Signal Logging for a Model (Simulink)

To log signals marked for signal logging, set the Signal logging configuration parameter.

Common Scope Block Tasks

Step-by-step procedures of common scope tasks, including logging data, sharing scope images, and display manipulation.

Related Information

Array Plot with Apple iOS Devices (Simulink Support Package for Apple iOS Devices)

Array Plot with Android Devices

Featured Examples

Time Scope Measurements

Measure performance characteristics of a pulse width modulated sinusoid. The example contains a model which you can modify to view the effects of parameter changes on rise time, fall time, overshoot, undershoot, pulse width, pulse period, and duty cycle measurements. The example also shows an example of a rising edge trigger and is set up to perform basic statistical operations (mean, median, RMS, maximum, minimum) and measure the frequency and period of the pulse period via cursors and peak finding.

Open Model

Spectrum Analyzer Measurements

Perform measurements using the Spectrum Analyzer block. The example contains a typical setup to perform harmonic distortion measurements (THD, SNR, SINAD, SFDR), third-order intermodulation distortion measurements (TOI), adjacent channel power ratio measurements (ACPR), complementary cumulative distribution function (CCDF), and peak to average power ratio (PAPR). The example also shows how to view time-varying spectra by using a spectrogram and automatic peak detection.

Open Model