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Test and Measurement

Waveform generation, file IO formats, visualization, and performance analysis

Generate waveforms and use quantitative tools to measure system performance. Use graphical utilities such as constellation and eye diagrams to visualize the effects of various impairments and corrections.

Supported file formats to process captured signals include binary baseband signal and NI™ technical data management solution (TDMS) format files. You can read data into tables or timetables by reading TDMS-files individually, or by reading collections of TDMS-files simultaneously.


Wireless Waveform GeneratorCreate, impair, visualize, and export modulated waveforms
Bit Error Rate AnalysisAnalyze BER performance of communications systems


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biterrNumber of bit errors and bit error rate (BER)
symerrCompute number of symbol errors and symbol error rate
berawgnBER and SER for uncoded data over AWGN channels
bercodingBER for coded AWGN channels
berconfintError probability estimate and confidence interval of Monte Carlo simulation
berfadingBER and SER for uncoded data over Rayleigh and Rician fading channels
berfitFit curve to nonsmooth empirical BER data
bersyncBER for imperfect synchronization
semianalyticBER using semianalytic technique
scatterplotDisplay input signal in IQ-plane
eyediagramGenerate eye diagram
plotPhaseNoiseFilterPlot response of phase noise filter block
marcumqGeneralized Marcum Q-function
noisebwEquivalent noise bandwidth of digital lowpass filter
qfuncQ function
qfuncinvInverse Q function
showcommblockdatatypetableCommunications Toolbox block characteristics
tdmsreadRead data from TDMS-file
tdmswriteWrite data to TDMS-file
tdmsinfoInformation about TDMS-file
tdmsreadpropRead properties as single row table from TDMS-file
tdmswritepropWrite properties to TDMS-file


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comm.ACPRMeasure adjacent channel power ratio (ACPR)
comm.ErrorRateCompute bit or symbol error rate of input data
comm.EVMMeasure error vector magnitude (EVM) of received signal
comm.MERMeasure modulation error ratio of received signal
powermeterMeasure power and CCDF of the power of voltage signal
comm.ConstellationDiagramDisplay and analyze input signals in IQ-plane
spectrumAnalyzerDisplay frequency spectrum of time-domain signals
timescopeDisplay time-domain signals
dsp.ArrayPlotDisplay vectors or arrays
comm.BasebandFileReaderRead baseband signal from file
comm.BasebandFileWriterWrite baseband signal to file
tdmsDatastoreDatastore for collection of TDMS-files


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Error Rate CalculationCompute bit error rate or symbol error rate of input data
EVM MeasurementMeasure error vector magnitude (EVM)
MER MeasurementMeasure modulation error ratio in digital modulation applications
Power MeterMeasure power and the CCDF of the power of voltage signal in Simulink
Constellation DiagramDisplay and analyze input signals in IQ-plane
Eye DiagramDisplay eye diagram of time-domain signal
Time ScopeDisplay and analyze signals generated during simulation and log signal data to MATLAB
Spectrum AnalyzerDisplay frequency spectrum
Waveform From Wireless Waveform Generator AppWireless waveform source exported to Simulink
Baseband File WriterWrite baseband signals to file
Baseband File ReaderRead baseband signals from file


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