# Rectangular Window

- Also known as Dirichlet window. An amplitude weighting used to truncate continuous time signals to fit within the length of the DFT window. The rectangular window has a value of 1 over the length of the window and 0 outside.

- The fourier transform of a rectangular window is the sinc function:

- On a log scale the response is:

**See also: **Blackman Window, Blackman-Harris Window, Cauchy Window, Fast Fourier Transform, Hamming Window.

**Subjects: ** Noise & Vibration Signal Processing