In today’s houses and flats there are an increasing number of radio and TV sets. Every member of the family has different interests and programme wishes. The father of the household may want to watch football, the mother a documentary about garden design and the children usually want to tune in to music channels. Therefore an adequate number of antennae sockets are needed in the separate rooms.
These sockets are connected via a network of electrical installation conduits. It is standard to use conduits and not to lay the cables directly in the plaster. This gives greater flexibility allowing wires to be replaced and systems to be up dated or extended to fit changing requirements.
Electrical installation conduits radiate out from a central point, usually the mains connection, to the individual rooms.
This star form layout allows all the conventional modern reception systems to be used including:
- terrestrial antennae,
- satellite antennae and
With all the above systems the previous analogue signal is progressively being replaced by a digital one.
The digital system is called DVB (Digital Video Broadcasting). In some parts of Germany a DVB signal can be received terrestrially (DVB-T). Generally, however, a small antenna is needed; only in areas near to transmitters is a room antenna sufficient. For the conversion of the digital signal a special receiver, usually built into the television, is required.
DVB-C stands for digital cable television. In this case a special receiver for each TV set is also required.
Alongside the analog television and radio transmissions emitted from satellites there are also an increasing number of digital channels (DVB-S). To access these one digital receiver per household is needed.
Electrical sockets should be fitted next to antennae connection points to allow appliances, such as television, DVD player and digital receiver, to be plugged in. A triple socket is recommended.
To avoid cable clutter, electrical installation conduits should be laid to carry the loud speaker wires from the radio or stereo to the speakers. Nobody wants leads trailing across the living room or through the doorways from one room to another.