What does dsp.SpectrumAnalyzer do under the hood?

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I have the below code that displays the spectrum of a signal. However, before ploting this spectrum I want the original frequency-domain signal from which this spectrum is derived. What does the object dsp.SpectrumAnalyzer do exactly to plot the spectrum?
data = 2.*randi([0 1], 1e6, 1)-1;
txFilter = comm.RaisedCosineTransmitFilter;
filteredData = txFilter(data);
rxSignal = awgn(filteredData, 20);
freqAnalyzer = dsp.SpectrumAnalyzer('SampleRate',8e6);

Answers (1)

Walter Roberson
Walter Roberson on 31 Aug 2022
What it does "exactly" is set up a matlabshared.scopes.UnifiedSystemScope() and then update() the scope with the data.
Walter Roberson
Walter Roberson on 31 Aug 2022
That is hidden inside .p files.
I could have another look to see if I could forgot to "step in" but I am not hopeful.

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