One very important consideration of the use of “S-meters”, and “S-units” is remembering that signals are heard as a “Square Law Function” Every time you double or lengthen the communications path by twice the distance, the signal has fallen to one-fourth, or a 6 dB change! It is good to know how many dB per S-unit your receiver‘s meter indicates. This will probably not be a linear consideration -- and don’t believe the old wives tale about 6 dB’s per S-unit. It is the rare radio indeed where that is true! Even better than using “S-units”, give other stations reports in (ACCURATE) dBm! You will need the use of a calibrated signal generator to assess your receiver.
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