Windowing is a frequency filter that is applied to the frequency‑domain data when it is converted to time‑domain data. This filtering rolls off the abrupt transition that occurs at the start and stop frequencies. This effectively produces a time‑domain response with lower sidelobes. Windowing allows a limited degree of control over the pulse shape, trading ringing (sidelobes) for pulse width. Four different windows are available: Rectangular, Nominal Sidelobe, Low Sidelobe, and Minimum Sidelobe. The Rectangular option provides the narrowest pulse width, and the Minimum Sidelobe option provides the least ringing (fewest sidelobes). For more details on Windowing, refer to Windowing.