For over modulation, the value of modulation index m is

For over modulation, the value of modulation index m is

a.) m <1
b.) m=1
c.) m>1
d.) not predetermined

Correct Answer: c.) m>1

Explanation:

In AM, the modulation index m is defined as the ratio of the amplitude modulation signal to the amplitude of carrier signal. When m> 1, it is called over-modulation and it generates modulation with distortions in the envelope of the modulated signal, from which it is difficult to recover the information.

For Under modulation m<1

For Critical modulation m=1

For Over modulation m>1