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Electronics Paper 2, May/June 2008  
Questions: 1 2 3 4 5, 6 & 7 8 9 10 Main
General Comments
Weakness/Remedies
Strength
Question 4

(a)  Sketch the following with respect to frequency modulation (F.M):
        (i)            carrier signal;
        (ii)           modulating signal.
(b) State
        (i)            two advantages;
        (ii)           one disadvantage
                       Of frequency modulation (F.M)
               

  
_____________________________________________________________________________________________________
OBSERVATION

The expected answers were:
(a)      

                          
(b)          Advantages of FM
                -              Better signal fidelity.
                -              Better noise immunity.
                -              Higher efficiency.
                                Disadvantages

  1. Larger bandwidth requirement
  2. Limited coverage.

This question was on communication systems. The question was popular. The candidates answered correctly with ease.

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