Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > Which is true in a frequency modulated system...
Start Learning for Free
Which is true in a frequency modulated system ?
- a)Variation of carrier amplitude does not affect quality of reception
- b)Amplitude of carrier is varied according to modulating signal
- c)The transmission does not require line of sight between transmitter and reciever
- d)Receiver uses diode detector
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Which is true in a frequency modulated system ?a)Variation of carrier ...
Variation of carrier amplitude does not affect quality of reception
Explanation:
Frequency modulation (FM) is a modulation technique used in electronic communication, most commonly for transmitting information via a carrier wave by varying the frequency of the carrier wave in proportion to the instantaneous amplitude of the modulating signal.
In a frequency modulated system, the variation of the carrier amplitude does not affect the quality of reception. This is because FM is a form of angle modulation, where the information is encoded in the change of frequency, rather than the amplitude of the carrier wave.
Here are the key points explaining why the statement is true:
1. Amplitude vs Frequency Modulation:
- In amplitude modulation (AM), the amplitude of the carrier wave is varied in proportion to the instantaneous amplitude of the modulating signal. Changes in the carrier amplitude directly affect the quality of reception in AM systems.
- In frequency modulation (FM), on the other hand, the frequency of the carrier wave is varied in proportion to the instantaneous amplitude of the modulating signal. The amplitude of the carrier wave remains constant, and only the frequency changes.
2. Benefits of Frequency Modulation:
- FM has several advantages over AM, including better noise immunity, improved signal-to-noise ratio, and higher fidelity.
- The constant amplitude of the carrier wave in FM ensures that the received signal is less susceptible to amplitude variations caused by noise or interference.
3. Receiver Operation:
- In an FM system, the receiver uses a frequency discriminator to recover the modulating signal from the received frequency-modulated waveform.
- The receiver does not rely on variations in the carrier amplitude to extract the information. Instead, it focuses on detecting and measuring the changes in the carrier frequency.
- The diode detector mentioned in option 'D' is commonly used in amplitude demodulation (AM) systems, not frequency modulation (FM) systems.
Conclusion:
In summary, the statement that the variation of carrier amplitude does not affect the quality of reception in a frequency modulated system is true. FM systems rely on changes in frequency rather than amplitude, and the receiver uses a frequency discriminator to recover the modulating signal.
Explanation:
Frequency modulation (FM) is a modulation technique used in electronic communication, most commonly for transmitting information via a carrier wave by varying the frequency of the carrier wave in proportion to the instantaneous amplitude of the modulating signal.
In a frequency modulated system, the variation of the carrier amplitude does not affect the quality of reception. This is because FM is a form of angle modulation, where the information is encoded in the change of frequency, rather than the amplitude of the carrier wave.
Here are the key points explaining why the statement is true:
1. Amplitude vs Frequency Modulation:
- In amplitude modulation (AM), the amplitude of the carrier wave is varied in proportion to the instantaneous amplitude of the modulating signal. Changes in the carrier amplitude directly affect the quality of reception in AM systems.
- In frequency modulation (FM), on the other hand, the frequency of the carrier wave is varied in proportion to the instantaneous amplitude of the modulating signal. The amplitude of the carrier wave remains constant, and only the frequency changes.
2. Benefits of Frequency Modulation:
- FM has several advantages over AM, including better noise immunity, improved signal-to-noise ratio, and higher fidelity.
- The constant amplitude of the carrier wave in FM ensures that the received signal is less susceptible to amplitude variations caused by noise or interference.
3. Receiver Operation:
- In an FM system, the receiver uses a frequency discriminator to recover the modulating signal from the received frequency-modulated waveform.
- The receiver does not rely on variations in the carrier amplitude to extract the information. Instead, it focuses on detecting and measuring the changes in the carrier frequency.
- The diode detector mentioned in option 'D' is commonly used in amplitude demodulation (AM) systems, not frequency modulation (FM) systems.
Conclusion:
In summary, the statement that the variation of carrier amplitude does not affect the quality of reception in a frequency modulated system is true. FM systems rely on changes in frequency rather than amplitude, and the receiver uses a frequency discriminator to recover the modulating signal.
Free Test
FREE
| Start Free Test |
Community Answer
Which is true in a frequency modulated system ?a)Variation of carrier ...
Frequency Modulation:
- Frequency Modulation is a modulation in which the frequency of the carrier wave is altered according to the instantaneous amplitude of the modulating signal, keeping phase and amplitude constant.
- So, the variation in carrier amplitude and carrier phase does not affect the signal in the receiving end.
- Line of sight (LoS) is a type of propagation that can transmit and receive data only where transmit and receive stations are in view of each other without any sort of an obstacle between them. Eg: FM radio, microwave, and satellite transmission.
- Frequency Modulation works on the Line of sight propagation.
Types of FM detection:
- Slope detection
- Phase-locked loop detection
- Foster Seeley detection
- Ratio detector
- Quadrature detectors.
Attention Electronics and Communication Engineering (ECE) Students!
To make sure you are not studying endlessly, EduRev has designed Electronics and Communication Engineering (ECE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electronics and Communication Engineering (ECE).
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Similar Electronics and Communication Engineering (ECE) Doubts
Top Courses for Electronics and Communication Engineering (ECE)View all
Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer?
Question Description
Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer?.
Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE).
Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
Here you can find the meaning of Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which is true in a frequency modulated system ?a)Variation of carrier amplitude does not affect quality of receptionb)Amplitude of carrier is varied according to modulating signalc)The transmission does not require line of sight between transmitter and recieverd)Receiver uses diode detectorCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Electronics and Communication Engineering (ECE) tests.
|
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
x
![]()
For Your Perfect Score in Electronics and Communication Engineering (ECE)
The Best you need at One Place
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup