smecenasHW1 - Schayne Mecenas ECT263 Chp 3#3 4 5 6 24 30 33...

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Schayne Mecenas ECT263 Chp 3 #3, 4, 5, 6, 24, 30, 33, 48 3. The closer the modulation index is to 1 the more power is sent to the sidebands, in turn this makes the AM transmitter more efficient. 4. When an AM modulator is over modulated the signal goes beyond zero and causes a reversal of the carrier phase. Since most AM modulators don’t go beyond zero, the portions of the signal that go beyond zero disappear, in its place is distortion. Over modulation is undesirable due to the distortion it creates and the additional
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Unformatted text preview: bandwidth it uses, additionally over modulation of an AM transmitter is illegal. 5. Amplitude modulation sends out two signals, the frequencies of said signals are the sum or difference of the information and carrier frequencies. 6. A narrow bandwidth allows for more information to be transmitted. 24. V(t) = [15+4 sin(44x10^3t)]sin(46.5x10^6t)V (a) (b) (c) m = em/ec = 4/15 m= 0.27 (d) (e) 30. 30kHz 33. (a) = 0.7 (b) = 6kHz (c) = 20v...
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• Summer '15
• Carrier wave, 15 m, Schayne Mecenas

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