You might have seen images of old TVs with a series of colorful bars, called a test pattern. What were these for, and are ...

What looks like random blocks of color to the untrained eye is actually a carefully laid-out test pattern. For example, the colors yellow, cyan, green, magenta, red, blue actually goes from ...

Color bars--the universal television signal test pattern and audio tone sent to keep cameras, monitors and equipment in synchronization today are a social media memorial to the reporter and ...