Abstract: An arrangement for the reduction of noise transmitted in the return direction fron a local cable TV network (10) comprises an input (14), an output (16), means (21) for evaluating signals incoming at the input (14), and blocking means (17) controllable by said evaluation means (21). Said blocking means are formed by a reprogrammable digital signal processing unit (17), which is connected to the input (14) via an analog-to-digital converter (19) and which is arranged to generate digital output signals corresponding to portions of the incoming signals, depending upon the existing programming of the signal processing unit (17) and the result of the evaluation of the incoming signals effected by the evaluation means (21), and to deliver said digital output signals to a digital-to-analog converter (24) connected to the output (16).