Laboratory and computer tests for Carson´s FM bandwidth rule

The commonly cited significance for Carson´s FM bandwidth is that it defines spectral limits which contain 98% or more of the spectrum power. The 98% rule typically requires enough computations to discourage its application for in-situ laboratory type measurements. Furthermore, the 98% rule will only provide an upper bound for Carson´s bandwidth rule. What is suggested in this paper is a more direct, simpler approach which provides both upper and lower bounds. The sideband reduction method described, is based on taking visual cues for sideband reduction levels measured with respect to the unmodulated carrier. Computations required by the method are not extensive. In addition, the sideband reduction method is confirmable using an FFT test on the computer