Q.1 What is the advantage of DSB-SC Demodulation?
A) Power consumption is reduced and nominal
B) The bandwidth of the DSB-SC signal is double that of the message signal
C) Both A & B
D) None of these
Q.2 The normalized power of the AM signal is ?
Q.3 Suppose that a 5000 - W AM transmitter is connected to a 50 Ω load. Calculate Ac
A) 710 v
B) 707 v
C) 807 v
D) 1010 v
E) None of these
Q.4 A given AM braoadcast station transmits an average carrier power output of 40 kW and uses a modulation index of 0.707 for sine wave modulation. Calculate ( a ) the total average power output ; ( b ) the transmission efficiency ; and ( c ) the peak amplitude of output if the antenna is represented by a 50 Ω resistive load?
A) 10 kW, 30% & 4000 V
B) 50 kW, 90% & 3440 V
C) 50 kW, 20% & 3414 V
D) 60 kW, 80% & 5400 V
