CRTenheder

CRTenheder is a type of television broadcast technology used in some countries, particularly in Norway and Denmark. It stands for " servis TV" in Norwegian, which translates to "service TV". This technology allows for the broadcasting of a regular TV signal, as well as one or more additional TV channels on the same frequency.

CRTenheder uses a technique called "repeater channel" or "subchannel broadcasting" to transmit multiple TV channels on the same frequency. This is in contrast to traditional analog broadcasting methods, where each station broadcasts on a separate frequency. The method is also known as "calling channel" or " reserve channel".

In Norway, CRTenheder has been used since the 1960s to broadcast additional TV channels, including some regional and thematic channels. The system has been used as a temporary solution to provide more TV channels to viewers, but it has some disadvantages. For instance, CRTenhederRequire receivers to receive a specific signal to access additional channels.

In Norway and Denmark, the use of CRTenheder has been declining in recent years, as they have begun to digitalize their TV broadcasting systems. This shift has allowed for more efficient and modern broadcasting methods, such as DVB-T, the European digital TV standard. Despite its decline, CRTenheder remains an important part of the broadcasting history in some countries, offering a glimpse into the early stages of television broadcasting development.