Draft:Emergency Broadcast System
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Background
The Emergency Broadcast System (often shortened to just EBS), was the primary emergency warning system in the US. Its main purpose was to allow the President of the US to inform the public in the event of a war, even though this never happened. It was replaced by the Emergency Alert System in 1997.
National Screens
1st Screen (1970s?-1997?)
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Visuals: On a black background, there are three ellipses, one in red, one in teal, and one in orange. Inside the ellipses are the letters "e", "b", and "s". The "b" is white.
Technique: A still, computerized graphic.
Audio: The Attention Signal, which is a combination of two sine waves (853 and 960 Hz). This is usually followed by an announcer stating alert information.
Audio Variants:
- The length of the Attention Signal can vary from 8 to 25 seconds.
- Tests of the system would be accompanied by the following message (or a variation of it): "This is a test. For the next sixty (or thirty) seconds, this station will conduct a test of the Emergency Broadcast System. This is only a test." (Attention Signal); "This is a test of the Emergency Broadcast System. The broadcasters of your area in voluntary cooperation with the FCC and other authorities (or, in later years, "federal, state and local authorities") have developed this system to keep you informed in the event of an emergency. If this had been an actual emergency, the Attention Signal you just heard would have been followed by official information, news, or instructions. (Name of Host station) serves (the name of operational area). This concludes this test of the Emergency Broadcast System."
Availability: Seen on tests of the system, until around 1997.
Legacy: One of the most common and recognizable EBS screens.
