Terrestrial and satellite broadcasting currently carry information and entertainment to every region on the planet. The fundamental meaning of the word broadcast is to inform many people. The ability to send or transmit this information from one point to many receiving points within the coverage area using either wired or wireless technologies is what makes broadcast capability so powerful that many governments of nations worldwide still control the broadcast signals, their content and the bandwidth they may occupy. Since broadcast signals originating from a single transmitting facility can reach so many receivers, it is more easily controlled than when the information is being distributed from multiple points of transmission.

The history of broadcasting begins with the discovery and development of radio. Although later dwarfed in significance by television, radio remains the choice of the mobile audience especially for local news, weather and sporting event coverage. The early technical development of radio was largely driven by scientific desires to better understand the behavior of modulated radio waves. Television, on the other hand, fell into the hands of the big marketing machine from an early age, and you can judge the results for yourself.

A Brief History of Radio

The History of Television

How does analog (NTSC) television work?

How does analog FM radio work?