How does a radio transmission work?

Radio works by transmitting and receiving electromagnetic waves. The radio signal is an electronic current moving back and forth very quickly. A transmitter radiates this field outward via an antenna; a receiver then picks up the field and translates it to the sounds heard through the radio.

How does a radio use digital transmission?

In the United States, digital radio is broadcast using in-band on-channel technology. This enables radio stations to broadcast their regular FM or AM signal and their digital signal at the same frequency. In other words, a station at 88.7 FM would have a digital signal at 88.7 FM on a digital radio.

How is radio audio transmitted?

The audio signal causes the radio speaker’s diaphragm to vibrate, which creates sound waves. A sound wave equivalent to the singer’s voice radiates from the speaker.

How is radio transmission established?

Radio waves were first identified and studied by German physicist Heinrich Hertz in 1886. The first practical radio transmitters and receivers were developed around 1895–1896 by Italian Guglielmo Marconi, and radio began to be used commercially around 1900.

What are the two components required for radio communication?

The receiver receives the radio waves and decodes the message from the sine wave it receives. Both the transmitter and receiver use antennas to radiate and capture the radio signal.

How does digital FM radio work?

Digital radio works by turning sound into digital signals for transmission and then decoding them at the other end using digital radio receivers; the result is close-to-CD-quality sound output.

Is FM radio analog or digital?

Analog radio has two main parts, a receiver and a transmitter. The transmitter sends radio signals—called continuous sine waves—using one of two types of modulation to carry information. These two types of modulation are Amplitude Modulation (AM) and Frequency Modulation (FM).

How sound waves are transmitted and received?

Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.

Which waves are used for radio transmission?

Radio waves are a type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz (GHz) and below.

How far can RF signal travel?

Thus the typical ranges with around 400 MHz frequency range with 1 W transmitter power are up to ~30 kilometers and up to ~80 kilometers with 10 W transmitter power. See sample picture of a RF link functional factors at the end of this document. The links can be extended by using repeater radio stations.