SIGVIEW is a real-time signal analysis software package with wide range of powerful FFT spectral analysis tools, statistics functions and a comprehensive visualization system.
Sigview gives you absolute freedom to combine different signal analysis methods in any possible way - there are no artificial rules and limitations.
This program received 5 awards
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Unfortunately THD calculation is not anyhow described and it is not working at all. The more the periods I provide the lower THD is ?! But I carefully selected data starting at zero and finishing at zero keeping whole period. Where is any info about THD calculation? any setting?