engineering recuitment BEL Probationary Engineers Mock Test 2025 Communication Systems Amplitude Modulation
Which of the following statements is true regarding the bandwidth of an amplitude modulated signal?
1
The bandwidth is equal to the carrier frequency.
2
The bandwidth is equal to the sum of the carrier frequency and twice the highest frequency of the message signal.
3
The bandwidth is dependent on the modulation index.
4
The bandwidth is twice the highest frequency of the message signal.