Radio communication , Physics

Production of sound messages by a microphone in a radio station (studio).

1) Audio frequency generation.
2) Generation of r.f. carrier wave.
3) Modulation in a transmitter,
b) 4) Transmitting antenna on a tower,
c) Radio receiver,
5) Receiving antenna,
6) Tuning circuits,
7) Detector (demodulator),
8) Amplifier,
9) Speaker.

Production of sound and modulated waves : In the studio, the music or song is converted into electrical signals using a microphone. These signals are in the audio frequency (a.f) range. An osillator produced suitable r.f. carrier wave.

Radio transmitter or modulator: The a.f. signal and r.f. waves are combined in the transmitter. The modulated (combined) waves are fed for an antenna fixed on a tower. This transmitting antenna broadcasts the modulated r.f. waves into space. 

Radio Receiver: The aerial of a radio receiver receives the modulated waves transmitted by various radio stations. The tuning circuit inside the radio set selects only the desired signal. The detector circuits demodulates the modulated signals. Then the a.f. signal is fed to an amplifier. The amplified electric signals are fed to a speaker and converted into the music or song.

1227_radio communication.png

Posted Date: 8/29/2012 1:56:52 AM | Location : United States







Related Discussions:- Radio communication , Assignment Help, Ask Question on Radio communication , Get Answer, Expert's Help, Radio communication Discussions

Write discussion on Radio communication
Your posts are moderated
Related Questions
why is the sky blue?

What is a pure spectrum? provide an example. What do you mean by impure spectrum? show an example.

450J of energy are changed into heat in 1 minute. What power is dissipated? A current of 10A ?ows by a conductor and 10Wis dissipated. What p.d. exists across the ends of

As we know that"The electric potential at a certain point inside the electric field is defined as the amount of work done in bringing a unit positive test charge uniformly (without

Awhat is angle of projection of body thrown from inclined plane of 37degree so that body hits inclined plane normalysk question #Minimum 100 words accepted#

how CPH is able produce all bosons? Answer; the fermions produce their bosons. Look at the pair production that before of pair there is not boson, however after pair bosons app

Tungsten: Atomic number 74 Symbol W Atomic weight 183.85 Discovery Purified Tungste

Two compartments each of 1 m 3 capacity are connected by a valve and insulated from the surroundings and from each other. One compartment contains saturated steam at 683.6 kPa and

The variable resistor is a resistor whose value can be accustomed by turn a shaft or sliding a control. They are also referred to as potentiometers or rheostats and permit the resi

Derive mathematical equation for the equivalent capacitance (Capacity) when capacitors are connected in series.