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  • Subject:

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  • Topic:

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(i) Write the factors that prevent a baseband signal of low frequency to be transmitted over long distances.

(ii) What is to be done to overcome these factors? Draw a block diagram to obtain the desired signal.

                                                         (3) marks

 

Explanation:

 (i) size of the antenna

(1/2)

Effective power radiated by the antenna

(1/2)

Mixing up of signals from different transmitters

(1/2)

(ii) modulation

(1/2)

Block diagram of amplitude modulation

(1)

BOARD