Head end having a low noise converter with channel preselecting frequency multiplexor

摘要

A head end ( 7 ) comprises a low noise converter ( 2 ) for providing signal bands including channels to one or more user units ( 3 ). The low noise converter is arranged as a low noise channel converter ( 2 ), which includes frequency multiplexing means ( 6 ) for multiplexing one or more user pre-selected channels to the user units ( 3 ). By effecting pre-selection in the low noise channel converter ( 2 ) the connection between the head end ( 7 ) and the user units ( 3 ) only contains a single communication medium ( 5 ), generally an already installed coaxial cable ( 5 ). Wanted channels for example for watching one television program and simultaneously recording another program are pre-selected and at the side of the low noise block put on the one cable.