- Why is FM immune to noise?
- Which one of the following noise becomes of great importance at high frequencies?
- Why is AM radio bad quality?
- What does AM and FM stand for in time?
- What are the applications of FM?
- What is difference between AM and FM?
- Why do we still use AM radio?
- Why is my AM radio so static?
- What are the limitations of AM?
- What are the types of FM?
- What is the disadvantage of FM over AM?
- Which of the following is not an advantage of FM over AM?
- What are the disadvantages of FM?
- What are the advantages and disadvantages of both AM and FM?
- What is the full meaning of FM and AM?
- Why do we need frequency modulation?
- Which is stronger AM or FM?
- What is the ideal bandwidth of FM signal?
- Which of the following is an indirect way of generating FM?
Why is FM immune to noise?
Due to this noise signal there is some change in the amplitude of the fm wave signal.
But the fm wave does not contain signal in the amplitude variation all the information is stored in the frequency vairation.
so it is more immune to noise ..
Which one of the following noise becomes of great importance at high frequencies?
2. Which one of the following noise becomes of great importance at high frequencies? Explanation: If the time taken by electrons to travel from emitter to collector becomes comparable to the period of the signal which is amplified which is only possible at high frequencies called transit time.
Why is AM radio bad quality?
AM stands for Amplitude Modulation and has poorer sound quality compared with FM, but it is cheaper to transmit and can be sent over long distances — especially at night. The lower frequencies of the band we use for AM signals creates a wavelength that is extremely large.
What does AM and FM stand for in time?
AM and FM modulated signals for radio. AM (Amplitude Modulation) and FM (Frequency Modulation) are types of modulation (coding). The electrical signal from program material, usually coming from a studio, is mixed with a carrier wave of a specific frequency, then broadcast.
What are the applications of FM?
APPLICATIONS OF FREQUENCY MODULATIONFrequency modulation can be used for the broadcasting of FM radio. … Telemetry, radar and seismic prospecting, EEG monitoring of newborns etc also use the technique of frequency modulation.It is also used in music synthesis, some systems that use video-transmission and also for magnetic tape-recording systems.
What is difference between AM and FM?
The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequency (the number of times each second that the current changes direction) of the carrier signal is varied.
Why do we still use AM radio?
One reason AM broadcast is still around it is used mostly for talk radio. There are a few FM talk radio stations, most are on AM. Talk radio does not require the quality of audio that FM can provide with music, so many AM stations went with talk radio. … So many AM stations remain on because of this.
Why is my AM radio so static?
Many other sources produce radio waves, including the sun, lightning, and power lines. If the frequency of these other waves overlap with the intended channel, the AM receiver can pick them up as changes in amplitude, resulting in noise or static.
What are the limitations of AM?
Disadvantages of Amplitude Modulation:An amplitude modulation signal is not efficient in terms of its power usage. … It is not efficient in terms of its use of bandwidth. … AM detectors are sensitive to noise hence an amplitude modulation signal is prone to high levels of noise.Reproduction is not high fidelity.
What are the types of FM?
There are different types of FM demodulators including:Slope Detector.Foster-Seeley Discriminator.Ratio Detector.Pulse-Averaging Discriminators.Quadrature Detectors.Phase-Locked Loops.
What is the disadvantage of FM over AM?
Disadvantages of FM over AM are FM systems have a much wider bandwidth than AM systems and therefore more prone to selective fading. … FM transmitter and receiver require booster circuits as they have poorer signal to noise ratio at high audio frequencies.
Which of the following is not an advantage of FM over AM?
7. Which one of the following is not an advantage of FM over AM? Explanation: Frequency Modulation has many advantages over amplitude modulation such as it has better noise immune, it requires less modulating power. But it requires higher bandwidth is not an advantage of FM when compared to AM.
What are the disadvantages of FM?
Disadvantages of FM: Much more Bandwidth (as much as 20 times as much)….Frequency ModulationImproved signal to noise ratio (about 25dB) w.r.t. to man made interference.Smaller geographical interference between neighboring stations.Less radiated power.Well defined service areas for given transmitter power.
What are the advantages and disadvantages of both AM and FM?
The other advantage is that it has a narrower bandwidth than FM, and wider coverage compared with FM radio. The major disadvantage of AM is that the signal is affected by electrical storms and other radio frequency interference.
What is the full meaning of FM and AM?
AM (amplitude modulation) and FM (frequency modulation) are types of modulation (coding). The sound of the program material, usually coming from a radio studio, is used to modulate (vary) a carrier wave of a specific frequency, then broadcast.
Why do we need frequency modulation?
Frequency modulation is widely used for FM radio broadcasting. … In radio transmission, an advantage of frequency modulation is that it has a larger signal-to-noise ratio and therefore rejects radio frequency interference better than an equal power amplitude modulation (AM) signal.
Which is stronger AM or FM?
FM uses a higher frequency range and a bigger bandwidth than AM. AM radio operates from 535 kHz (kiloHertz) to 1605 kHz. When you tune the dial on your radio, the number changes by 10 kHz each time. This means that each station has 10 kHz of bandwidth on which to broadcast.
What is the ideal bandwidth of FM signal?
As a rule of thumb, often termed as Carson’s Rule, 98% of the signal power in FM is contained within a bandwidth equal to the deviation frequency, plus the modulation frequency doubled. Carson’s rule: Bandwidth of FM BWFM = 2 [ Δf + fm ].
Which of the following is an indirect way of generating FM?
Armstrong modulatorArmstrong modulator is an indirect way of generating FM.