Basic scheme of how the DEPFET read-out is implemented in SIXTE. The read-out is separated in four time steps from t₀ to t₄, the duration of which can be specified in the instrument description. Between the first and second integration (lower panel), the charge is removed in the clear step (upper panel) followed by a settling time. As displayed in the figure, the second integration is performed with a negative sign and therefore acts as subtraction of the baseline.