Podcast Beta
Questions and Answers
Transmitter, the channel, and a ______ are three major subsystems in information transmission systems.
receiver
Messages may be categorized as ______ or digital.
analog
The message produced by a source must be converted by a ______ to a form suitable for communication systems.
transducer
In electrical communications, speech waves are converted by a ______ to voltage variations.
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The signal can be interpreted as the variation of a quantity, often a voltage or current, with ______.
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Common examples of input transducers include ______, camera, and keyboard.
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The purpose of the transmitter is to couple the message to the ______.
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Modulation is the systematic variation of some attribute of the ______, such as amplitude, phase, or frequency.
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There are several reasons for using a carrier and ______ it.
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In radio communication, modulation schemes are used to encode information onto the ______.
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