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Questions and Answers
Which of the following is not true about AM?
Which of the following is not true about AM?
- The carrier frequency remains constant. (correct)
- The information signal amplitude changes the carrier amplitude.
- The carrier amplitude varies.
- The carrier frequency changes.
The outline of the peaks of a carrier has the shape of the modulating signal and is called the ____.
The outline of the peaks of a carrier has the shape of the modulating signal and is called the ____.
- Envelope (correct)
- Carrier Variation
- Trace
- Waveshape
A carrier of 880 kHz is modulated by a 3.5-kHz sine wave. The LSB and USB are respectively, ____.
A carrier of 880 kHz is modulated by a 3.5-kHz sine wave. The LSB and USB are respectively, ____.
- 887 and 873 kHz
- 876.5 and 883.5 kHz
- 883.5 and 876.5 kHz (correct)
- 873 and 887 kHz
An AM signal has a carrier power of 5W. The Percentage of modulation is 80 percent. The total sideband power is __.
An AM signal has a carrier power of 5W. The Percentage of modulation is 80 percent. The total sideband power is __.
What is the function of an antenna in communication?
What is the function of an antenna in communication?
Which method of communication involves the transmission of signals through a medium such as a transmission line or fiber optics cable?
Which method of communication involves the transmission of signals through a medium such as a transmission line or fiber optics cable?
What is the primary difference between wired and wireless communication?
What is the primary difference between wired and wireless communication?
In the context of communication, what does 'modulation' refer to?
In the context of communication, what does 'modulation' refer to?
What does the symbol 𝜆 represent in the context of communication?
What does the symbol 𝜆 represent in the context of communication?
What is the role of transmission line or fiber optics cable in wired communication?
What is the role of transmission line or fiber optics cable in wired communication?
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