RADIO BROADCASTING SYSTEM
Broadcasting: Broadcasting is the distribution of audio and/or video signals which transmit programs to an audience. The audience may be the general public or a relatively large sub-audience, such as children or young adults. RADIO BROADCASTING: Broadcasting system is a chain of technically / electronically coupled elements which is used to pick up an ordinary sound wave, convert it to an electrical wave (of some frequency say from 50Hz to 10 Khz) without any change in its parameters. This sound wave is fed to a radio transmitter where its frequency is again raised by combining it to third wave of a higher frequency called the radio frequency. This is the frequency which is allotted to a particular station (in Pakistan a Frequency Allocation Board (FAB) allotted a frequency). This is called the carrier frequency while the wave of the second frequency is called the audio wave. The audio and carrier waves are combined electronically through a process called Modulation. This important ...