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D1072 Pages: 2

are suppressed in an AM wave with modulation index equal to (a) | and (b) 0.25.

With the block diagram of transmitter and receiver, explain pilot carrier SSB
system.
Make a comparison of AM with FM

PART C
Answer any two full questions, each carries 20 marks.

With the block diagram, explain Armstrong method for FM generation.

Draw the circuit diagram of amplitude limiter and explain its working.

With the help of circuit diagram, explain the working of a varactor diode
modulator.

Using expressions, compare FM and PM and show that FM may be generated
using PM.

What are the basic functions of a telephone set?

With the help of a circuit diagram, explain the working of a JFET reactance
modulator.

Explain the working of a cordless telephone.

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