1. A touch sensitive device comprising: first and second plurality of conductors arranged such that: when the touch sensitive device is not being touched, a first amount of signal is coupled between them, and when the touch sensitive device is being touched, a different amount of signal is coupled between them; signal generator adapted to generate a plurality of unique orthogonal signals, each unique orthogonal signal being orthogonal to each of the other unique orthogonal signals; signal processor being adapted to decode the signals present on each of the second plurality of conductors during each of a plurality of successive measurement periods, and for each of the signals present on each of the second plurality of conductors for each of the plurality of successive measurement periods, to determine which of the unique orthogonal signals form a non-negligible part thereof, the signal processor outputting an event stream comprising usable touch events, the event stream based on the signals present on each of the second plurality of conductors during each of the plurality of successive measurement periods; decimator operatively connected to the event stream, the decimator adapted to decimate the event stream and produce at least one output stream comprising usable touch events, the output stream being for use by the touch sensitive device.