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Correlations 2 : Communications 2nd Sem 2526
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In amplitude modulation, if m is greater than 1, what happens?
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An AM transmitter antenna current is measured with no modulation and found to be 2.6 amperes. The percentage of modulation is
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What is the third character in the emission designation for telephony?
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The values of Vmax and Vmin as read from an AM wave on an oscilloscope are 2.8 and 0.3. The percentage of the modulation is
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What are the basic elements of communications system?
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Signal contamination by extraneous or external sources, such as, other transmitters, power lines and machinery.
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A circuit often used in radio receivers that prevents externally generated noise from exceeding certain amplitude. They are also called noise clippers.
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The typical audio modulating frequency range used in radio and telephone communications is
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The function which tends to silence the receiver in the absence of transmitted carrier
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An amplifier operating over the frequency range of 455 to 460 kHz has a 200 kΩ input resistor. What is the RMS noise voltage at the input to this amplifier if the ambient temperature is 17°C?
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