Dwell Time - DW
The dwell time is the time difference between two data points of the fid. It is calculated from the sweep width according to DW=10e6/(2*SW*SFO1). If you change DW, SW is recalculated according to SW=10e6/(2*(0.05+DW)*SFO1). The minimum dwell time (corresponding to the maximum possible sweep width) depends on the digitizer type installed in the spectrometer.