Abstract: Disclosed herein is a method of calibrating a printing device, a detector for use in a printing device and a printing device. The method is for calibrating a printing device having a nozzle that is to eject a drop of a printing fluid and a sensor that is to detect a drop of the printing fluid at a detection position. The method comprises ejecting a drop of the printing fluid from the nozzle; determining a measurement signal during a detection window with the sensor; extracting an arrival time of the drop from the measurement signal; and determining an adjusted detection window by adjusting the detection window based on the arrival time.