Digital Terrestrial Television (DTT) is an implementation of digital technology. DTT provides a greater number of channels and/or better quality of picture and sound, using aerial broadcasts to a conventional antenna (or aerial) instead of a satellite dish or cable connection. .
In satellite communication, signal transferring between the sender and receiver is done with the help of satellite. In this process, the signal which is basically a beam of modulated microwaves is sent towards (Up linked) the satellite. Then the satellite amplifies the signal and sends it back to the receiverís antenna (Down link) present on the earthís surface.