If an AM transmitter operates at 1000 kHz carrier frequency with a tot

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Module 1: Analog Modulation

20247m

If an AM transmitter operates at 1000 kHz carrier frequency with a total power of 10 kW and modulation index of 0.8, determine the power in the carrier and sidebands.

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Answer

Given $P_t=10$ kW $\mu=0.8$ : $P_t=P_c(1+\mu^2/2)$ → $P_c=10/1.32=7.58$ kW, $P_{SB}=2.42$ kW total, each 1.21kW. Efficiency $\mu^2/(2+\mu^2)=24.2\%$ .

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