1.
Define modulation?
Modulation is a process by which
some characteristics of high frequency carrier signal is varied in accordance
with the instantaneous value of the modulating signal
2.
Define depth of modulation.
It is defined as the ratio between
message amplitude to that of carrier amplitude.
3.
What is the need of modulation?
-Ease of transmission
-multiplexing
-reduce noise
-narrow bandwidth
-reduce the equipments limitations
4.
What is the degree of modulation?
-Under modulation, m<1
-Critical Modulation, m=1
-Over modulation, m>1
5.
What are the two types of modulator?
-linear modulator
-Non-Linear modulator
