This part is responsible to send useful information such as audio, video, or other data either analog or digital to the receiver. A transmitter consists of various electronic elements that work together to generate radio waves that contain data that is to be transmitted. Every transmitter contains below sections for its operation:
- Power supply
Every gadget needs some electric power for its functioning. This unit provides the necessary electrical power to operate the transmitter.
It is a source that generates powerful electromagnetic or radio waves to carry the informative data towards the receiver. Typically it generates a sine wave, which is referred to as a carrier wave.
This is similar to the processor of a computer system. Modulator adds useful information or data signal to the carrier wave. The process of adding up the carrier and informative data is known as Modulation. There are two main ways of modulation. The first method called amplitude modulation or AM makes slight increases or decreases to the amplitude of the carrier wave or signal. The second, called frequency modulation FM, makes slight increases or decreases the frequency of the carrier wave.
The primary task of the amplifier is to amplify the modulated signal (data + carrier signal). It increases the power of the modulated signal. The more powerful the amplifier makes more powerful the broadcast.
It converts amplified modulated signals into radio waves.