If the bandwidth is increased by 2, the ?FM ?AM (where ? is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of
Options
A. 2
B. 3
C. 4
D. 6
Correct Answer
4
Explanation
Doubling of frequency increase SNR in frequency modulation by 4. It has no effect in AM.
More questions
1. The output frequency of a cycloconverter can be changed by changing the firing angle.
Firing angles are kept equal to get symmetrical output voltage.
7. The real part of complex dielectric constant and tan? for a dielectric are 2.1 and 5 x 10-4 at 100 Hz respectively. The imaginary part of dielectric constant at 100 Hz is