Science Fair Project Encyclopedia
Indian Head test card
The Indian Head test pattern
The Indian Head test card was a black and white television test pattern used by RCA that was introduced in 1939. The card was generated by using a special tube called a monoscope . The Indian Head would could be seen when a station had closed down for the night. It would often be accompanied by the national anthem followed by a 1,000 hertz test tone.
When American broadcasters transitioned to color television, the SMPTE color bars superseded this black-and-white image.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details