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State and prove the sampling theorem?
If the signal is bandwidth to the fm Hz means signal which has no frequency higher than fm can be recovered completely from set of sample taken at the rate
Why is amplitude of demodulated FM signal much less than modulated signal?
because demodulated FM is an audio signal, which the frequency is much smaller that is why it can be transmitted alone. It need carrier which has large frequency. Modulated signal is an audio signal + carrier that is why the amplitude is higher.
Why am rather than FM in most used in mobile radio system?
FM and AM are both used in radio systems today. AM stands for amplitude modulation, and in AM radios, the signal goes farther but has more interference from objects and the weather. FM has a higher quality sound, and is used for its better music/sounds.
Differentiate FM signal from AM signal?
FM = Frequency Modulation; AM = Amplitude Modulation; each being a technique by which the speech signal is imprinted onto the carrier signal (the one to which you tune the radio). FM is a higher frequency than AM. FM also only uses the 2.7hz upper side band of the frequency while AM utilizes the entire 6hz both the LSB, USB and the .6hz carrier wave. That allows AM to travel farther than a FM signal.
Do FM transmitter MP3 player connections lose sound quality?
Since the signal is passed over radiowaves, you can expect to lose some sound quality depending on which FM transmitter you purchase.
Pre-emphasis in FM systems involves?
Amplification of higher frequency component of modulating signal
What wave has a shorter wavelength AM or FM?
Generally, the wavelength of an FM signal is shorter than an AM signal. A typical FM broadcast band is 88-108 MHz, while a typical AM broadcast band is 540-1660 KHz, making the FM signal wavelength 100 times shorter.
What makes FM radios different from AM radios?
AM radio is KHz FM radio is MHz AM radio can cover the world. FM radio can cover a county. AM radio is excellent in communication. FM radio is completely worthless, except for good sound quality. AM radio doesn't have as good sound quality as FM. FM is much higher on the radio spectrum than AM.
What is function of crystal oscillator in FM generation?
A crystal oscillator in FM generation provides a stable and precise frequency reference essential for modulating the carrier signal. It ensures that the frequency of the generated FM signal remains consistent and accurate, minimizing drift and improving overall signal quality. By using a crystal oscillator, the modulation process can produce clear and reliable frequency variations corresponding to the input audio signal. This stability is crucial for effective communication in FM broadcasting and other applications.
What are the similarities and differences between AM and FM waves?
Both AM (amplitude modulation) and FM (frequency modulation) are methods to add information to a carrier wave. The main difference is how they encode this information: AM varies the signal's amplitude, while FM varies the signal's frequency. AM is more susceptible to interference but has a longer range, while FM is less prone to interference and offers better sound quality.
Why FM is preferred for audio signal transmission?
FM also known as frequency modulation is preferred because of the more concise ability to transfer quality sound at the expence of distance. Also FM is not as severely effected by weather as its lower frequency AM counterpart.
How is the bandwidth allocated in case of FM?
In Frequency Modulation (FM), bandwidth is allocated based on the modulation index, which is determined by the frequency deviation of the carrier signal and the frequency of the modulating signal. According to Carson's Rule, the total FM bandwidth is approximately twice the sum of the maximum frequency deviation and the maximum frequency of the modulating signal. This means that FM signals can occupy a wider bandwidth compared to Amplitude Modulation (AM), allowing for better noise immunity and audio quality. Typically, for standard FM broadcasting, the bandwidth is around 200 kHz.
