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Signal to Noise ratio for a hi-fi system is equal to ________(a) 50 dB(b) 100 dB(c) 75 dB(d) 10 dBThe question was asked in a job interview.This key question is from Modulation Using Non-Linear Devices (Balanced Modulator) in section Amplitude Modulation of Analog Communications

Answer»

Correct answer is (a) 50 dB

For explanation: SIGNAL to Noise ratio compares signal power to noise power. It determines how much signal is PRESENT in a transmitted wave compared to PRESENCE of noise. It is generally expressed in decibels(dB). For a hi-fi SYSTEM, it should be EQUAL to 50dB.



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