Also for the DiSEqC master (the receiver) different DiSEqC levels are defined:
DiSEqC 1.0 receiver can create all four fundamental DiSEqC commands (polarisation, band, position, option; the committed switches), but are unable to recognise a slave reply.
DiSEqC 1.1 receivers can in addition to the level 1.0 commands create a further four further DiSEqC control signals (uncommitted switches).
DiSEqC 1.2 receiver can control in addition to the level 1.1 a steerable dish.
DiSEqC 2.x receivers have the same control possibilities as DiSEqC 1.x receivers, however bi-directional communication between receiver and the Slave component is possible, e.g. for automatic installation or error diagnosis.