Derivation of the DFT
How the DFT is derived — the orthogonality of sines, the sine and cosine pair that together give amplitude and phase, and what turns the DFT into the FFT.
Use cases and examples
Step-by-step procedures in the Signal Analyzer — peak marking and filtering, real-time Gaussian noise and FIR design, coherence and transfer functions.
Video tutorial
Eight short videos of the Signal Analyzer at work — navigation, marking, format conversion, playback, the signal generator and filtering.