What are split field color bars used for?

peasypod

Well, since I'm not a "dyed-in-the-wool" A/V techie, I guess I don't find this as stimulating as some. http://www.extron.com/technology/archive.asp?id=vtg300signals Apr 05 05, 10:23 PM

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What frequencys are the four tones generated for testing audio when T.V. stations are off air but still broadcasting split field color bars or in the old days the test pattern/indian head? The field used for the Teletubbies is in which UK county? What is the most used color in the flags of the world? Why did prisoners used to have to wear horizontal stipes on their uniforms? Was it supposed to represent the bars or something?

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