Analogue uses electromagnetic waves which are a type of energy, electromagnetic waves can carry information as they move which can be used to transfer information to one point to another.
Broadcasters can use radio waves to transfer their programmes to a viewers television. Analogue works by sending the information as radio waves from a transmitter to a receiver. The receiver catches the signal from the transmitter and send it down a wire to the TV.
TV channels are tuned in on the TV according to their frequency.
1929 BBC begins Broadcasting “over the Air”.
1961 a conference in Stockholm (ST61) gives each European country its own frequency to broadcast its programmes.
2010 – 2012 UK digital switchover takes effect, all terrestrial broadcasting in the EU is set to end in 2012.
Cheap, able to broadcast to both local and national audiences, can serve a variety of different reception modes like Handheld, Aerial on house or TV, Transmission quality stays the same regardless of the size of the audience.
limited interactivity, line of sight obstructions can weaken the signal strength, Takes up a considerable airspace which puts it at odds with other broadband users, Image quality can suffer “ghosting”.