English
The FFT spectral line of the signal is related to the shape and size of the graph; when the signal shape is rectangular, the spectrum graph is rectangular; when the signal shape is square, the spectrum graph is also square, and the signal axis and the spectrum axis form a 90 degree angleSpanish
Cuando la forma de la señal es rectangular, el espectro es rectangular; cuando la forma de la señal es cuadrada, el espectro también es cuadrado, el eje de la señal y el eje del espectro forman un ángulo de 90 grados
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