Test procedure
1) Normal programming is suspended.
2) The announcement written below is transmitted. "This is a test. This station is conducting a test of the Emergency Broadcast System. This is only a test."
3) The special attention signal is sent. Broadcast the two-tone Attention signal from the EBS encoder for 20 to 25 seconds.
4) The announcement written below is transmitted. "This is a test of the Emergency Broadcast System. The broadcasters of your area in voluntary cooperation with the 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. This station serves the (name of operational area) area. This concludes this test of the Emergency Broadcast System."
The purpose of the test was to allow the proper functioning of EBS tone transmitters and decoders to be verified. In addition to the weekly test, test activations of the entire system were conducted periodically for some years before being discontinued. These tests showed that about 80% of broadcast outlets nationwide would carry emergency programming within a period of five minutes when the system was activated.
Variations of the above announcement were heard in different parts of the country. At least one version made explicit reference to an attack on the United States as being a possible scenario for EBS activation. The annoucement text was mandated by the FCC, including the "voluntary cooperation" clause, which was not true, as broadcast outlets were required by law to participate.
The weekly broadcast of the EBS test message made it part of the U.S. cultural fabric of the era.