Fill in the Blanks


1		In the process, the baseband voice, video, or digital signal modifies another, higher-frequency signal called the carrier.


2		In AM, the signal varies the amplitude of the carrier sine wave.


3		If the amplitude of the modulating signal is than the amplitude of the carrier, distortion will occur.


4		The relationship between the amplitude of the modulating signal and the amplitude of the is known as the modulation index.


5		In AM if the modulating voltage is much greater than the carrier voltage, a condition known as results.


6		In AM is prevented by using automatic circuits called compression circuits.


7		The of AM is more commonly expressed as the percentage of modulation rather than as a fractional value.


8		In AM occur at frequencies that are the sum and difference of the carrier and modulating frequencies.


9		An oscilloscope’s display gives no obvious or outward indication of the existence of sidebands.


10		A(n) analyzer is used to display the frequency domain of a signal.


11		The of an AM signal is twice the highest frequency in the modulating signal.


12		According to Fourier theory, complex signals and distorted sine waves are made up of a fundamental sine wave and numerous signals.


13		In AM the conveys no information.


14		In amplitude modulation, two-thirds of the transmitted power is in the .


15		signals are used in FM and TV broadcasting to transmit two-channel stereo signals and to transmit the color information for a TV picture.