Question

I HAVE EXAM TOMORROW..
PLZ HELP
ANSWER PLZ
NO SPAMS
1)Define modulation index and write its expression
2)Define amplitude modulation and illustrate it using diagrams (graphs)
3).What are the basic elements of a communication system? Explain the function of
each.
3).Draw the block diagram of a communication system.

Answer 1

Hii mate!!

Here's your answer.

1)Modulation index can be defined as ratio of amplitude of modulating signal to amplitude of carrier wave.

Modulation index=Am/Ac

2)Amplitude modulation

Amplitude of carrier wave change in accordance with change in amplitude of modulating signal.

3)Basic elements of communication system-:

a)Transmitter

It converts message signal to suitable form for transmission.

b)Communication channel

It carries modulated wave from transmitter to receiver.

c)Receiver

It picks up transmitted signal and process it to produce message signal.

Hope it helps you.