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Which of the following statements regarding Armstrong modulator is NOT correct?
- a)System is basically phase modulation system
- b)Frequency multiplication is necessarily used
- c)Equalization is unnecessary
- d)FC is not needed, as a crystal oscillator is used.
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Which of the following statements regarding Armstrong modulator is NOT...
Armstrong's modulator is basically a phase modulator; it can be given a frequency modulation characteristic by an integrator inserted between the message source and the modulator. For a single tone message, at one frequency, it is not possible to tell, by whatever measurement, if the integrator is present (so it is an FM signal) or not (a PM signal). Crystal oscillator is used to provide the carrier signal, the frequency cannot be varied too much (this is a characteristic of crystal oscillators). Thus, crystal oscillators cannot be used in broadcast FM, but other oscillators can suffer from frequency drift. An automatic frequency control (AFC) circuit is used in conjunction with a non - crystal oscillator to ensure that the frequency drift is minimal.
Most Upvoted Answer
Which of the following statements regarding Armstrong modulator is NOT...
Armstrong Modulator
Introduction:
Armstrong modulator is a form of frequency modulation system that is used to modulate a high-frequency carrier signal with the low-frequency message signal. It was invented by Edwin Armstrong in 1918.
Statements:
a) System is basically phase modulation system:
Armstrong modulator is basically a phase modulation system. In this system, the phase of the carrier signal is varied in accordance with the modulating signal.
b) Frequency multiplication is necessarily used:
In Armstrong modulator, frequency multiplication is necessarily used to obtain the required frequency carrier signal. The frequency of the carrier signal is multiplied by a factor of 2 or 3 to obtain the required frequency.
c) Equalization is unnecessary:
This statement is incorrect. Equalization is necessary in Armstrong modulator to compensate for the phase shift caused by the modulating signal. Without equalization, the output signal will be distorted.
d) FC is not needed, as a crystal oscillator is used:
In Armstrong modulator, a crystal-controlled oscillator is used to generate the carrier signal. The crystal oscillator provides a stable frequency reference that is required for high-quality modulation.
Conclusion:
In conclusion, the correct statement regarding Armstrong modulator is that equalization is necessary to compensate for the phase shift caused by the modulating signal.
Introduction:
Armstrong modulator is a form of frequency modulation system that is used to modulate a high-frequency carrier signal with the low-frequency message signal. It was invented by Edwin Armstrong in 1918.
Statements:
a) System is basically phase modulation system:
Armstrong modulator is basically a phase modulation system. In this system, the phase of the carrier signal is varied in accordance with the modulating signal.
b) Frequency multiplication is necessarily used:
In Armstrong modulator, frequency multiplication is necessarily used to obtain the required frequency carrier signal. The frequency of the carrier signal is multiplied by a factor of 2 or 3 to obtain the required frequency.
c) Equalization is unnecessary:
This statement is incorrect. Equalization is necessary in Armstrong modulator to compensate for the phase shift caused by the modulating signal. Without equalization, the output signal will be distorted.
d) FC is not needed, as a crystal oscillator is used:
In Armstrong modulator, a crystal-controlled oscillator is used to generate the carrier signal. The crystal oscillator provides a stable frequency reference that is required for high-quality modulation.
Conclusion:
In conclusion, the correct statement regarding Armstrong modulator is that equalization is necessary to compensate for the phase shift caused by the modulating signal.
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Which of the following statements regarding Armstrong modulator is NOT correct?a)System is basically phase modulation systemb)Frequency multiplication is necessarily usedc)Equalization is unnecessaryd)FC is not needed, as a crystal oscillator is used.Correct answer is option 'C'. Can you explain this answer?
Question Description
Which of the following statements regarding Armstrong modulator is NOT correct?a)System is basically phase modulation systemb)Frequency multiplication is necessarily usedc)Equalization is unnecessaryd)FC is not needed, as a crystal oscillator is used.Correct answer is option 'C'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Which of the following statements regarding Armstrong modulator is NOT correct?a)System is basically phase modulation systemb)Frequency multiplication is necessarily usedc)Equalization is unnecessaryd)FC is not needed, as a crystal oscillator is used.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding Armstrong modulator is NOT correct?a)System is basically phase modulation systemb)Frequency multiplication is necessarily usedc)Equalization is unnecessaryd)FC is not needed, as a crystal oscillator is used.Correct answer is option 'C'. Can you explain this answer?.
Which of the following statements regarding Armstrong modulator is NOT correct?a)System is basically phase modulation systemb)Frequency multiplication is necessarily usedc)Equalization is unnecessaryd)FC is not needed, as a crystal oscillator is used.Correct answer is option 'C'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Which of the following statements regarding Armstrong modulator is NOT correct?a)System is basically phase modulation systemb)Frequency multiplication is necessarily usedc)Equalization is unnecessaryd)FC is not needed, as a crystal oscillator is used.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding Armstrong modulator is NOT correct?a)System is basically phase modulation systemb)Frequency multiplication is necessarily usedc)Equalization is unnecessaryd)FC is not needed, as a crystal oscillator is used.Correct answer is option 'C'. Can you explain this answer?.
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