A test card, also known as a test pattern or start-up/closedown test, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast (often at sign-on and sign-off). Used since the earliest TV broadcasts, test cards were originally physical ... 1 Technical details; 2 History; 3 Monoscope; 4 Test patterns for photocopiers ...
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Apr 22, 2012 ... Film · Books · Music · Art & design · TV & radio · Stage · Classical · Games ... In the mid-70s, there were only three TV channels and very few programmes during the day. ... had more screen time – around 70,000 hours – than anyone else in British TV history. ... But it was the testcard music that hooked me.
Test Cards were designed to calibrate the fidelity of an image at both the television camera and receiver ends of the transmission process. Appearing first as a ...
Nov 14, 2014 ... Television Test Cards, Tuning Signals, Clocks and Idents Information and pictures. ... specifications and more detailed history are on World TV Standards. ... first-ever electronic test pattern known as the cruciform (or 'art bars' ...