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FM stereo _________

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FM stereo  _________

(a) is implemented using an SCA signal

(b) has a higher signal to noise ratio than mono FM

(c) is not compatible with mono FM

(d) uses DSBSC AM modulation

This question was addressed to me in an interview for job.

Question is taken from Switching Circuit in chapter Side Band Techniques of Analog Communications

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The correct option is (d) uses DSBSC AM modulation

For explanation: A stereo FM contains three major sections :- monomode, stereo mode and section common to both mono and stereo mode. The stereo section is much complicated than others. It uses DSBSC AM modulation, in which the carrier is suppressed and only the two sidebands are transmitted, for its process.

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