Excerpts: "Analog NTSC televisions generate color by looking at the phase of a signal relative to a reference frequency." [...] "And instead of doing color p

Excerpts: "Analog NTSC televisions generate color by looking at the phase of a signal relative to a reference frequency." [...] "And instead of doing color properly by synthesizing the phases and stuff like that, it simply used a crystal that was 3.58 megahertz [the carrier frequency for the color signal] minus 15.750 kilohertz, which was the horizontal scan frequency. So it slipped one phase, 360 degrees, every scan line. You put that signal on the screen and you’ve got a color bar from left to right."