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True or False
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1
In the modulation process, the baseband voice, or digital signal modifies another, lower-frequency signal called the sideband.
A)True
B)False
2
With amplitude modulation, the instantaneous value of the carrier frequency changes in accordance with the amplitude and frequency variations of the modulating signal.
A)True
B)False
3
In amplitude modulation it is important that the peak value of the modulating signal is less than the peak value of the carrier.
A)True
B)False
4
The circuit used for producing AM is called a modulator.
A)True
B)False
5
When the modulating voltage is much less than the carrier voltage, a condition called overmodulation results.
A)True
B)False
6
Sidebands occur at frequencies that are the sum and difference of the carrier and modulating frequencies.
A)True
B)False
7
Observing an AM signal on an oscilloscope, amplitude variations of the carrier with respect to time can be seen.
A)True
B)False
8
A test instrument known as a spectrum analyzer is used to display the time domain of a signal.
A)True
B)False
9
Voice frequencies occur in the 300-KHz to 3000-KHz range.
A)True
B)False
10
According to Fourier analysis, complex signals and distorted sine waves are made up of a fundamental sine wave and numerous harmonic signals.
A)True
B)False
11
In AM, the information signal varies the amplitude of the carrier.
A)True
B)False
12
Distortion will occur if the amplitude of the modulating signal is less than the amplitude of the carrier.
A)True
B)False
13
The ratio of the modulating signal voltage to the carrier voltage is referred to as overmodulation.
A)True
B)False
14
Distortion caused by overmodulation also produces adjacent channel interference.
A)True
B)False
15
Bandwidth of an AM signal is twice the highest frequency in the modulating signal.
A)True
B)False







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