What is analog TV?

This is archived content from Digital TV Facts. For up-to-date information on the digital TV transition, see the federal government’s site, www.DTV2009.gov.

Analog TV is the technology that has been used for U.S. television broadcasts since the 1940s. TV stations are currently making the transition to digital broadcasts.

In very basic technical terms, analog signals are transmitted to your TV by continuously varying radio waves.

(Cable television companies also deliver programming to many of their subscribers in analog form, though most also offer digital tiers or are making the transition to all-digital systems.)

THE LATEST: Updates on the digital TV transition