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What is center spread modulation?

April 26, 2017center modulation spread

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What is center spread modulation?

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The instantaneous output center frequency (Fc) is approximately the midpoint of the minimum frequency and the maximum frequency. The instantaneous output frequency will therefore always vary between FMIN and FMAX. The instantaneous minimum (FMIN) and maximum (FMAX) output frequencies are stated as a percentage (%) with respect to the center frequency. In Figure 8 above, the center spread diagram provides an example of a device with a +/-1.0% center spread percentage. In this example, if FO were 100MHz, typical frequencies for FMIN, FC and FMAX would be 99MHz, 100MHz, and 101MHz, respectively.