A Carrier Wave Is Modulated with 4 Amplitudes and 4

question 44

Multiple Choice

A carrier wave is modulated with 4 amplitudes and 4 phase changes; how many bits can be represented with each signal change?

• A)1
• B)2
• C)3
• D)4

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Definitions:

Reject Low Frequencies

Describes a filter's ability to attenuate or eliminate signals below a certain frequency threshold, allowing higher frequencies to pass.

High-pass

A filter that allows frequencies higher than its cutoff frequency to pass through while attenuating frequencies below the cutoff.

Radio Station

A service that broadcasts audio content through radio waves to be received by the public, typically including music, news, and other entertainment.

Separator

In electrochemical cells, a separator is a membrane that allows the flow of ions but prevents direct contact between the cathode and anode, thus avoiding a short circuit.