TESTCARD
Test card
A test card, also known as a test pattern, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast . Used since the earliest TV broadcasts, test cards were originally physical cards at which a television camera was pointed, and such cards are still often used for calibration, alignment, and matching of cameras and camcorders. Test patterns used for calibrating or troubleshooting the downstream signal path are these days generated by test signal generators, which do not depend on the correct configuration of a camera. Digitally generated cards allow vendors, viewers and television ...The above text is a snippet from Wikipedia: Test card
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test card
Noun
- A card printed with various letters or symbols, used in testing vision.
- A test signal, typically broadcast at times when the transmitter is active but no programme is being broadcast (often at startup and closedown).
The above text is a snippet from Wiktionary: test card
and as such is available under the Creative Commons Attribution/Share-Alike License.