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If the detector window (PV :SEQ:n:ENWIN_S) is set to "Windowed" then the window defined here is used to multiply the incoming data during a single dwell.  Use of a window can help control spectral leakage between adjacent frequencies.  There are two PVs on this screen, both prefixed with $(device):$(axis):

TitlePVDescription
Window:SEQ:WINDOW_SThis is the window to apply to incoming data for managing spectral leakage.  This PV can be written if a custom window is required.
Reset:SEQ:RESET_WIN_S

Processing this PV will reset the window to its default state, which is for  in the range .  This is known as the Hamming window.

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