A 2 MHz carrier is amplitude modulated by a 500 Hz modulation

Home » Communication » Communication miscellaneous » Question

A 2 MHz carrier is amplitude modulated by a 500 Hz modulation signal to a depth of 60%. If the unmodulated carrier power is 1kW, the power of the modulated signal is—

1. 1.83kW
2. 1.36kW
3. 1.18kW
4. 1.26kW

Correct Option: C

Given that
P_c = 1kW
μ = 60% = 0·6
Power of modulated signal

P_t = P_c		1 +	μ²
			2

or

P_t = 1kW		1 +	0.6²		= 1.18kW
			2