The Tuning Signal was first broadcast in 1934 using Baird's 30 line TV system. It is thought to be the first ever television test chart.
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.