Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Closed captioning is transmitted in a digital format on the last few lines of a TV signal. The lines don't show up because they were designed to fall off the bottom of the screen. If you adjust the vertical sync on a TV that has one so that the picture starts to roll a bit you can see the CC signal at the bottom of the screen.
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