Television Test Card
by Bildagentur-online/ohde/science Photo Library
Title
Television Test Card
Artist
Bildagentur-online/ohde/science Photo Library
Medium
Photograph - Photograph
Description
Television test card. A test card, or test pattern, is a television test signal typically broadcast at times when the transmitter is active but no program is being broadcast (often at startup and closedown). 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.
Uploaded
September 30th, 2018
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