In Step Scan Mode, no data is acquired while the motors
move to the next position. For each motor position the signal is
measured for a specified (dwell) time.
The integrating nature of the detector necessitates to reset the detector when starting to acquire data. Therefore a trigger must be provided before and after the dwell period.
Consecutively, two data acquisition triggers are generated by the detector, of which only the second one will be meaningful (since the integration period during motor move is ill defined and will probably be too long).
It needs to be investigated, how to deal with the two triggers. One possibility could be to record both readings and later disregard the first one.