The technology I will be focusing on for this blog is the television. According to the lecture, in 1939, the first public demonstration of a TV broadcast system was shown at the World’s Fair. Before the existence of the digital TV’s, all that existed were the big bulky, less appealing analog TV’s. Analog TV’s consisted of, a Cathode Ray Tube, which was made up of a near vacuum tube, a florescent screen, and an electron gun. The electron gun shoots 3 beams, a red, green, and blue beam in order to create an image of one line. Analog TV’s used more space on the spectrum, it took up 6 MHz in total, 5.5 MHz was devoted to video signal, and 0.5 MHz was devoted to FM audio signal. Analog TV eventually evolved into digital TV, which allowed for a wider image, better resolution, better sound, and the ability to multicast. A reason for the major shifts to digital televisions was because the old NTSC standards took up to much space on the spectrum, so the Advanced Television Systems Committee (
