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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.
Baseband Signal
__________ is the process of varying a carrier signal in order to use that signal to convey information
Modulation
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.
Beat frequency
A frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception.
Intermediate Frequency (IF)
To generate new frequencies by mixing two or more signals in a nonlinear device such as a vacuum tube, transistor, or diode mixer.
Heterodyne
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.
Mixer