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02000EC208052004

With the help of a block diagram, pilot carrier SSB transmitter. Why we use pilot
carrier?

Explain the need for AGC. Draw typical AGC circuit for a super heterodyne
receiver and explain its working.

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

With block diagram explain the FM Stereo broadcasting Transmitter.

Describe with block diagram, operation and basic functions of a standard
telephone switch.

Draw the block diagram of an Armstrong indirect FM Transmitter and describe
its operation.

With supporting equations and block diagram explain how the PM can be
obtained by using FM and vice versa.

Explain how a Foster-Seeley discriminator may be used to detect FM waves, with
relevant circuit and phasor diagrams.

What is AFC? Explain its function.

Describe the difference between the operation of a codeless telephone and a

standard telephone.

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