DO NOT GO TO THE POSTED COORDINATES - THE CACHE IS NOT THERE
This is a test of the Emergency Broadcast System. The broadcasters of your area in voluntary cooperation with the FCC and other authorities have developed this system to keep you informed in the event of an emergency. If this had been an actual emergency, you would have been instructed where to tune in your area for news and official information.
Those of a certain age will remember the regular testing of the Emergency Broadcast System from radio and TV consisting of the long, attention grabbing tone followed by an announcement of the test. Thankfully it was always just a test - we never had to hear, "This is not a drill." The EBS is no more, replaced in 1997 by the Emergency Alert System (EAS).
Did you know there was an earlier system, before the EBS? I first learned of it when looking at an old car radio from the 1950's. There were two little triangles on the dial at 640 and 1240kHz. I learned it was for CONELRAD (CONtrol of ELectromagnetic RADiation). CONELRAD was a method of emergency broadcasting to the public of the United States in the event of enemy attack during the Cold War. It was intended to allow continuous broadcast of civil defense information to the public using radio or TV stations, while rapidly switching the transmitter stations to make the broadcasts unsuitable for Soviet bombers that might attempt to home in on the signals (as was done during World War II, when German radio stations, based in or near cities, were used as beacons by pilots of bombers).
U.S. president Harry S. Truman established CONELRAD in 1951. After the development of intercontinental ballistic missiles reduced the likelihood of a bomber attack, CONELRAD was replaced by the Emergency Broadcast System (EBS) on August 5, 1963, which was later replaced by the Emergency Alert System (EAS) on January 1, 1997; all have been administered by the Federal Communications Commission (FCC).
The alerts have sounded, this is not a drill - puzzle incoming! Can you turn this 2 by 5 grid into the cache coordinates?