Modulation Techniques

Level: Easy
Last updated: 08-01-2018

Question:1

In FM sound broadcasting system maximum frequency deviation is usually

A. 15 KHz

B. 75KHz

C. 200KHz

D. 5.2KHz






Question:2

In AM if the modulation index is more than 100%,then

A. Power of wave increases

B. Efficiency of transmission increases

C. Wave gets distorted

D. None







Question:3

In amplitude modulation,the modulation envelop has a peak value of double the unmodulated carrier value. The modulation index is

A. 0.25

B. 0.5

C. 0.75

D. 1






Question:4

Which one of the following blocks is not common in both FM and AM receivers?

A. RF amplifier

B. Mixer

C. IF amplifier

D. Slope detector






Question:5

The message carrying efficiency is best in

A. FM

B. AM

C. AM-SC

D. PM






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