How TV works The scanning and reproducing discs are At the transmitter in this mechanical system, the studio is in total darkness. A light emanates from a lamp behind the disc and, projected through the holes set in the spiral on the outer edge, scans the features of the subject's face.
How Radio works At the radio station, an electrical signal is sent to an antenna -- the antenna converts the electrical signal into an electromagnetic wave.
Digital Technology in Radio Digital radio describes radio technologies which carry information as a digital signal, by means of a digital modulation method. The most common meaning is digital audio broadcasting technologies, but the topic may also cover TV broadcasting as well as many two-way digital wireless communication technologies. The acronym radioinformation digital signaldigital modulation wireless communication Digital radio describes radioradio