Two signals of 2GHz and 4GHz are frequency modulated on same carrier 10 GHz. Find the ratio of frequency deviation if band widths of both are equal.
A) 1:2 B) 2:1 C) 1:1 D) 1:4
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45 उत्तर
45 उत्तर
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C) 1:10Modal content
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1:20Modal content
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a0Modal content
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A) 1:20Modal content
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D)1:41Modal content
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1:21Modal content
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1:21Modal content
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1:21Modal content
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In frequency modulation the maximum frequency deviation is directly proportional to the product of modulation index (beta) and modulating frequency where beta is given by(Kp*Am)/fm. Now frequency deviation becomes (Kf *Am). So the frequency deviation depends on the magnitude of the modulating message signal.but not ntgr modulating signal frequency fm.Hence the deviation ratio is in the ratio 1:11Modal content
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C) 1:11Modal content
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1:21Modal content
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1:21Modal content
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a1Modal content
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1:1 because according to relation frequency deviation=K.Vm.fc in this relationship fc is same and K (bolzth man constant) constant so frq deviation depends only on amplitude of the msg signals hence no deviation due to carrier frq3Modal content
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10Modal content
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1:21Modal content
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2:11Modal content
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1:20Modal content
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1:20Modal content
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Option A0Modal content
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