
08-16-2000
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Contributing Authors
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Join Date: Jan 2000
Posts: 244
Rep Power: 13
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Radio Signal Strength
What does the term five by five in a radio check mean, and where did it come from? JW Mark Matthews responds: JW, The term five by five refers to the two measures of signal strength and readability; it is derived from older HAM radio instruments that were scaled from zero to 10 with 10 being the strongest. A five by five would be interpreted as 50 percent signal strength and easily readable, perhaps with some static or band clutter. A 10 by two would have a strong signal, but be broken and hard to understand, while a two by 10 would contain a weak signal, but be perfectly clear. A 10 by 10 would be very strong and crystal clear. Mark Matthews
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