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Questions and Answers
An SSBSC signal loses both the carrier and one sideband compared to a standard AM signal.
False
A DSBSC has a missing carrier when compared to a standard AM signal.
True
For undistorted AM to occur, the modulating signal voltage Vm must be less than the carrier voltage Vc.
True
When the modulation index m is less than 1, overmodulation occurs in the AM signal.
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An SSBSC signal retains both the carrier and one sideband compared to a DSBSC signal.
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An SSBSC signal contains both the carrier and one sideband compared to a standard AM signal.
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In a DSBSC signal, the carrier is present while one sideband is missing.
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For undistorted AM, the modulating signal voltage Vm can equal the carrier voltage Vc.
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Overmodulation occurs in the AM signal when the modulation index m is greater than 1.
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The characteristics of a DSBSC signal include an intact carrier and two sidebands.
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Study Notes
Amplitude Modulation (AM)
- Single Sideband Suppressed Carrier (SSBSC) signals are a type of amplitude modulation (AM) where the carrier signal and one sideband are removed, leaving only one sideband. This results in more efficient use of bandwidth.
- Double Sideband Suppressed Carrier (DSBSC) is another type of AM where only the carrier signal is removed, leaving both sidebands intact.
- Undistorted AM requires that the modulating signal voltage (Vm) must not exceed the carrier voltage (Vc).
- Overmodulation occurs when the modulation index (m) is greater than 1. This results in distortion of the AM signal, affecting the quality of the transmitted information.
Single Sideband Suppressed Carrier (SSBSC)
- SSBSC signals are a type of Amplitude Modulation (AM) signal that has had the carrier and one sideband removed.
Double Sideband Suppressed Carrier (DSBSC)
- DSBSC signals are a type of Amplitude Modulation (AM) signal that has had the carrier removed.
Amplitude Modulation (AM)
- Unmodulated AM signals require a modulating signal voltage (Vm) to be less than the carrier voltage (Vc) to prevent distortion.
- When the modulation index (m) exceeds 1, overmodulation occurs in the AM signal.
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Description
Explore the fundamentals of amplitude modulation (AM), including various types such as Single Sideband Suppressed Carrier (SSBSC) and Double Sideband Suppressed Carrier (DSBSC). Understand key concepts like overmodulation and the importance of maintaining voltage levels to prevent distortion in AM signals. Test your knowledge and deepen your understanding of AM techniques.
