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Communication Systems - Engineering

Communication Systems - Section 1
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Communication Systems - Section 18
Communication Systems - Section 19
Communication Systems - Section 20
Communication Systems - Section 21
Communication Systems - Section 22
Communication Systems - Section 23
Communication Systems - Section 24
Communication Systems - Section 25

For telegraphy the most commonly used modulation system is

A FSK

B two tone modulation

C PCM

D single tone modulation

ANS:A - FSK

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