For the signal ƒ(t) = 3 sin 8πt + 6 sin 12πt

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For the signal ƒ(t) = 3 sin 8πt + 6 sin 12πt + sin 14πt, the minimum sampling frequency (in Hz) satisfying the Nyquist criterion is __________.

1. 10 sample/sec
2. 1.4 sample/sec
3. 14 sample/sec
4. 2.4 sample/sec

Correct Option: C

Maximum frequency content in 7Hz
⇒ Nyquist rate = 2 × 7 = 14 sample/sec