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Communication Systems - Engineering

Q1:

In an FM system, when the AF is 500 Hz and the AF voltage is 2.4 V, the deviation is 4.8 kHz. If the AF voltage is now increased to 7.2 V, the new deviation will be

A 4.8 kHz

B 9.6 kHz

C 14.4 kHz

D 28.8 kHz

ANS:C - 14.4 kHz

Δf' = 2 x 7.2 14.4 kHz New frequency donation will be 14.4 kHz.