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6 Cards in this Set
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A signal that can include frequencies that are very near zero, by comparison with its highest frequency such as audio signals.
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Baseband Signal
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__________ is the process of varying a carrier signal in order to use that signal to convey information
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Modulation
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An interference between two sounds of slightly different frequencies, perceived as periodic variations in volume (audio) whose rate is the difference between the two frequencies.
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Beat frequency
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A frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception.
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Intermediate Frequency (IF)
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To generate new frequencies by mixing two or more signals in a nonlinear device such as a vacuum tube, transistor, or diode mixer.
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Heterodyne
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A nonlinear circuit or device that accepts as its input two different frequencies and presents at its output (a) a signal equal in frequency to the sum of the frequencies of the input signals, (b) a signal equal in frequency to the difference between the frequencies of the input signals, and, if they are not filtered out, (c) the original input frequencies.
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Mixer
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