A CATV network's return path is sensitive for the short-wave interferences. If the network and the connections in it are aging, this implies higher and higher problemes, the return path communication will be breaking up on account of intermodulations caused by the short-wave ingress. If the refurbishment of the network is planned for later, a high-pass filter is needed to solve this. After discussing this topic with the concerned clients, COMTECH has developed the needed filter in the standardized JXP style to make it comfortable for many device types. The module can be connected to an AT position, so it is available not only as a standalone filter, but also as a module containing attenuation.