A television signal contains a voice component which is an FM signal, and a video component which is an AM signal. The TV transmitter basically combines the voice and video information and puts it onto what is called a carrier wave for transmission into the air. Think of a car that is used to deliver a bag of groceries and a bag of hardware to a house, both accomplished at the same time. The carrier wave is what is sent into the air from the television tower. A TV receiver basically separates the voice and video info from the carrier, processes whats left, sends the video to the screen and the sound to a speaker. Now the circuits that accomplish that miracle are very complex, and my explanation is very simple. There are many good WEB sites and books on the subject. A understanding of basic electronics would go a long way in helping to grasp the principals. Cool right!
By definition an antenna (aerial) is a piece of conductive material which receives (or radiates) radio waves. So there is no alternative to it if the signal is airborne and transmitted by radio signal. However, TV pictures can be transmitted using other methods which although using radio waves (light is a radio wave remember) doesn't use an aerial in the strict sense of the word. TV information can be transmitted as a captured signal in coaxial or open feeder cable like cable TV. This is still a radio signal being used but its not (supposed) to be radiating (although it does leak if badly installed). More recently fibre optic cables have replaced traditional copper wires to carry the information. This uses a modulated laser on multiple frequencies to transmit information to a converter which then produces voltage signals that a TV can decypher and produce an image from.
Yes, this is a true statement. A TV channel is most often characterized by the frequency of its transmitted signal.
Radio Waves
The higher the frequency, the shorter the signal travels with the same relative transmit power. With lower frequency the signal travels longer. That's why you can listen to radio's from around the world, but not tv transmissions.
transmitted via radio waves
Interference between two radio waves can disrupt the signal being transmitted, causing distortion or weakening of the quality of the signal received. This can result in static, noise, or even complete loss of the signal.
The way the signal is transmitted and processed. FM radios are transmitted via signal generators and amplifiers on the ground while digital radio like Sirius or AM are transmitted via satellites. The digital signals are sent in packets vs. lower frequency radio waves.
An airtime is the duration of time during which a television or radio programme is transmitted.
The purpose of an antenna on a radio or tv set is so that it can get signal so we can view tv or listen to the radio
Radio transmission occurs when sound or pictures are changed into waves and transmitted. Radio waves are then sent to receivers. The more powerful that a signal is, the further the signal will travel
A tuner adjusts the frequency of a radio or television signal by selecting a specific frequency from the incoming signal and filtering out unwanted frequencies. This allows the device to receive and display the desired channel or station.
A bluescreen is typically the state of the TV/Monitor in the on state but in which no signal is being transmitted to the screen.