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Amplification of higher frequency component of modulating signal
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What is narrow band FM and how a narrow band FM generate?
If the modulation index of FM is kept under 1, then the FM produced is regarded as narrow band FM. Lower the modulation index, lower the no. of significant sidebands are produced (with reference to bessel function). So lower the no. of significant sideband, lowerer will be the bandwidth of the resulting FM prduced. Sometimes, Narrow Band FM is regarded as, when the significant energy in FM occupies the same bandwidth as ordinary AM with the same modulating signal.
How the modulation index varies for FM?
how modulation index varies for FM
How do you convert FM to PM and PM to FM waves?
In order to convert fm to pm, the modulation index must be set to be independent instead of having a variation. Then the receivers must be properly synchronized.
What is indirect method of FM transmitter?
indirect FM transmitter is the transmitter which indirected connectly to the FMINDIRECT FM GENERATIONWhile it is not possible to vary the frequency of a crystal oscillator directly, it is possible to vary its phase. The resulting PM signal can be used to create FM. This is the basis of the Armstrong modulator.The mathematics required to analyze the Armstrong modulator completely are complex, so we will discuss only the basic circuit operation. An audio signal is passed through a preemphasis network and then an integrator, a special network whose output is the time integral of the input signal. The preemphasized integrated signal is used to phase modulate a crystal oscillator. Mathematically, it can be shown that PM using the integral of the audio signal is identical to FM using the audio signal itself. In this way an FM signal is generated.The Armstrong modulator cannot produce much deviation, so combination of multipliers and mixers are used to raise the carrier frequency and the deviation. The multipliers are used to multiply the carrier and the deviation. The mixers are used to decrease the carrier, while keeping the deviation constant so that additional multiplier stages can be used to obtain more deviation. It is worth going through an example:An FM station is authorized to operate at 90.9 MHz, with maximum deviation of 75 KHz. The FM signal is generated with an Armstrong modulator whose output is 500 KHz with a deviation of 15.432 Hz. The modulator output is applied to 3 triplers and a doubler to obtain a frequency of 81 MHz and a deviation of 2.5 KHz. The 81 MHz signal is mixed with a 77.97 MHz signal to produce a 3.03 MHz signal whose deviation is still 2.5 KHz. This signal is fed through a doubler, tripler and quintupler to multiply the carrier to 90.9 MHz and the deviation to 75 KHz.
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.
Why preemphasis and deemphasis cannot be used in AM?
it can be used
Why do FDM FM microwave systems use low-index FM?
because high-index fm is too mainstream
Where are scosche fm transmitters used?
Scosche fm transmitters are used in most am/fm radios and stereos as well as many i-homes and other stereo systems. Car audio systems are included in this. And they're also found in many mp3players and i-pods.
Does interoperability mean primarily involves creating automated systems that allow for the sharing of sensitive incident information?
primarily involves creating automated systems that allow for the sharing of sensitive incident information
What is FM threshold effect?
An important aspect of analogue FM satellite systems is FM threshold effect. In FM systems where the signal level is well above noise received carrier-to-noise ratio and demodulated signal-to-noise ratio are related by: The expression however does not apply when the carrier-to-noise ratio decreases below a certain point. Below this critical point the signal-to-noise ratio decreases significantly. This is known as the FM threshold effect (FM threshold is usually defined as the carrier-to-noise ratio at which the demodulated signal-to-noise ratio fall 1 dB below the linear relationship given in Eqn 9. It generally is considered to occur at about 10 dB).
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.
Is homeostasis and human biology relevant?
Yes it is Homeostasis involves the bodys systems combating a stimulus the body returns the systems to its optium state and creaetes a steady state it does this by using the feedabck system Yes it is Homeostasis involves the bodys systems combating a stimulus the body returns the systems to its optium state and creaetes a steady state it does this by using the feedabck system Yes it is Homeostasis involves the bodys systems combating a stimulus the body returns the systems to its optium state and creaetes a steady state it does this by using the feedabck system
What are four FM radio stations?
Peace FM in Ghana,Joy FM,love FM and Spirit FM
What are good radio stations in the 831?
Hip Hop- "Jamming" 97.9 (FM) 102.5 "KDON" (FM) Sometimes 106.1 (FM) 94.9(FM) 99.7 (FM) Classic Rock 104.3 "The Hippo" (FM) Talk 88.9 (FM) 89.9 (FM) 90.3 (FM) Feel Free To Improve Answer
What is narrow band and wide band FM and How it can be generated?
In frequency modulation system, the maximum usable deviation be fixed +- 5 KHz and test deviation be kept 60% i.e. 3 KHz for wireless telephony systems used in military and other organisations. But wide band fm systems used in commercial broadcasts having frequency deviation +- 75 KHz.
Primarily involves creating automated systems that allow for the sharing of sensitive incident information?
Intraoperability
Do chromosomes maintain homeostasis?
Not directly. Homeostasis usually involves the proper function of a system or systems.
