PM launches 91 new FM transmitter in 18 states

Subject : Science and technology

Sec: Computer and AI

Concept :

The PM of India inaugurated 91 FM transmitters spread across 18 states and two UTs and asserted that the government was working towards giving people in every nook and corner of the country affordable access to technology.
With this, All India Radio was well on its way to expand its FM footprint nationally.
These FM transmitters will play a key role in a range of services be it timely dissemination of information, weather forecast for agriculture or connecting the women SHGs with new markets.

Frequency Modulation (FM)

It is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.
The technology is used in telecommunications, radio broadcasting, signal processing, and computing.
In analog FM (radio broadcasting), the instantaneous frequency deviation – the difference between the frequency of the carrier and its center frequency – has a functional relation to the modulating signal amplitude.
Digital data can be encoded and transmitted with a type of FM known as frequency-shift keying (FSK), in which the instantaneous frequency of the carrier is shifted among a set of frequencies.

FM Transmitter

It is a low-power FM radio transmitter that broadcasts a signal from a portable audio device (such as an MP3 player) to a standard FM radio.
Most of these transmitters plug into the device’s headphone jack and then broadcast the signal over an FM broadcast band frequency, so that it can be picked up by any nearby radio.
This allows portable audio devices to make use of the louder or better sound quality of a home audio system or car stereo without requiring a wired connection.
Being low-powered, most transmitters typically have a short range of 100-300 feet (30–91 metres), depending on the quality of the receiver, obstructions and elevation.