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In normal a.m. the sum of the power in the two sidebands can't exceed half the power of the carrier.
For example, a 100W carrier when 100% modulated will have 25W in each sideband. Since both sidebands have identical information, one of them can be considered redundant. So we are transmitting 150W and making use of only 25W.
In suppressed carrier d.s.b. we can achieve better efficiency since, with high suppression, we have 50% of the total power in each sideband.
So a 150W transmitter, at 100% modulation, will radiate 75W in each sideband.
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