Modulation line

A modulation line is a line for the transmission of the television or radio program from the studio to the transmission system . For radio programs were formerly with Pupin coils provided underground cables used today mostly ISDN - dedicated lines . In the past, coaxial cables were used for television programs because of the high bandwidth required . Nowadays, transmission mostly takes place over fiber optic networks.

The programs are not always played via a modulation line. It may also radio , a message transmission via satellite ( satellite transmission ), an Internet stream or reception of another broadcasting station (the signal ball reception ) are made.

In the case of important radio stations, several of these methods are often implemented, which are then available as alternatives ( redundancy ).