All around the world people watch TV and many people claim to be TV addicts! Even so there are many people who still are completely clueless as to how their TV works.
Television is certainly not a new technology, in fact it’s been around for years and the interesting truth is the technology its self has by and large remained the same since its invention in the 1920s.
How does a TV work?
How a TV works is actually quite simple, essentially in order to be able to watch TV several components have to work together.
- An image source- this is the actual feature you watch, so for example the documentary or film.
- A sound source - this is generated through an audio signal.
- A transmitter - this sends the image and the sounds source via the air waves and is received by the receiver (TV).
- A receiver is basically your TV set receiving the signal via radio waves and converting it into your TV programmes.
- A display device (TV screen) works together with a sound device (speakers) to enable you to watch TV.
To be a little more technical a TV aerial is made of metal. Electromagnetic waves transport signals to the television, these make small electrical currents in the antenna. The TV set amplifies this signal and receives the information that carries vision and sound. So we can watch TV!
What is the difference between an analogue TV aerial and digital TV aerial?
There are a few differences between an analogue and digital aerial. Analogue TV signals transmit one channel onto one carrier, where as digital aerial transmissions can fit a lot more data into the one carrier. Basically this means there is more available bandwidth and therefore more TV channels for us to watch!