Question

A transmitter radiates 10 kW of power with the carrier unmodulated and 11.8 kW with the carrier sinusoidally modulated. The modulation factor is

• A. 0.56
• B. 0.6
• C. 0.72
• D. 0.84

Answer 1

Answer: (B)

0.6

Answer 2

$P_{c} = P_{t} \left(1+ \frac{m^{2}}{2}\right)$ $\Rightarrow 11.8 = 10 \left( 1+ \frac{m^{2}}{2}\right)$ $\Rightarrow m = 0.6 \Rightarrow \%$ modulation $= 60\%.$