An AM transmitter has an un-modulated carrier power of 10 kW. It can be modulated by a sinusoidal modulating voltage to a maximum depth of 40%, without overload. If the maximum modulation index is reduced to 30%, what is the extent up to which the modulated carrier power can be increased without overloading?
Given that Pc = 10kW
Modulation index µ = 0.4
Total transmitted power
Now the effective modulation index
The total radiated power
Hence Pt = 11.25kW
Hence modulated carrier power is increased by amount of 11.25 - 10.08 = 1.17kW
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