Hi Michael,
I encountered a similar issue. As a workaround, you can use the GUI for the Spectrum Analyzer to obtain measurements of those signals. Alternatively, you could create separate objects of "dsp.SpectrumAnalyzer" for each signal and then retrieve the measurement data from them.
For example, consider the code below, which analyzes two "SineWave" signals using separate "spectrumAnalyzer" objects.
Fs = 100e6; % Sample rate
fSz = 5000; % Frame size
sin1 = dsp.SineWave(1e0,5e6,0,SamplesPerFrame=fSz,SampleRate=Fs);
sin2 = dsp.SineWave(1e-1,15e6,0,SamplesPerFrame=fSz,SampleRate=Fs);
scope1 = dsp.SpectrumAnalyzer(SampleRate=Fs,AveragingMethod="exponential",RBWSource="auto",SpectrumUnits="dBW");
scope1.CursorMeasurements.Enable = true;
scope1.ChannelMeasurements.Enable = true;
scope1.PeakFinder.Enable = true;
scope1.DistortionMeasurements.Enable = true;
scope1(sin1())
data1 = getMeasurementsData(scope1);
disp(data1.DistortionMeasurements.Power);
scope2 = dsp.SpectrumAnalyzer(SampleRate=Fs,AveragingMethod="exponential",RBWSource="auto",SpectrumUnits="dBW");
scope2.CursorMeasurements.Enable = true;
scope2.ChannelMeasurements.Enable = true;
scope2.PeakFinder.Enable = true;
scope2.DistortionMeasurements.Enable = true;
scope2(sin2())
data2 = getMeasurementsData(scope2);
disp(data2.DistortionMeasurements.Power);
Note: Starting from MATLAB R2022a, support for "dsp.SpectrumAnalyzer" has ended. Therefore, it is recommended to use "spectrumAnalyzer" for MATLAB R2022a or later versions."
For more information, refer to the documentation link below:
Hope this helps!!
