The present invention relates to an arrangement (1) for transmission of signal units to at least one receiver (3), comprising a receiving means being arranged to receive a number of signal units within a frequency range, whereby each signal unit includes at least one signal, and a forwarding means being arranged to make possible for at least a portion of said signal units to be forwarded or at least partially be blocked with respect to said receiver (3). The arrangement is intended to be arranged between a receiver antenna (2) and said receiver (3). The arrangement (1) is further connected to a central computer (6) via an interface unit (8a) and at least one communications network (7a). The central computer (6) can thus control the contents of a register in the arrangement (1), which denotes those of the signal units being received via the receiver antenna (2) that are allowed to be forwarded to the receiver (3).