Asked in ArchitectureWaves Vibrations and Oscillations
Waves Vibrations and Oscillations
What is the relationship between frequency modulation and the frequency carrier to the modulation index in the AM modulation?
What is amplitude modulation and frequency modulation and phase modulation difference between them?
Amplitude modulation is where a constant carrier is modulated by the signal, so that the envelope of the carrier represents the signal. Frequency modulation is where a constant carrier is modulated by the signal, so that the frequency of the carrier represents the signal. Phase modulation is where a constant carrier is modulated by the signal, so that the phase angle of the carrier represents the carrier.
Comparison of amplitude modulation and frequency modulation?
Asked in Electrical Engineering
What is the difference between pulse width modulation and pulse frequency modulation?
Frequency modulation, as the name suggests, modulates the carrier by changing the frequency of the signal emitted. Pulse width modulation, changes the on-time of a square wave, but leaves the frequency of the carrier wave unchanged. So, in frequency modulation, the frequency will vary between, say, 80kHz and 120kHz with a constant power level, but in pulse width modulation, the frequency will stay at 100kHz, but the on-time (the length of each pulse) will vary, hence the power level will vary accordingly.
What is FM?
FM stands for frequency modulation. The definition is: when the frequency of the carrier wave is changed in accordance with the intensity of the signal, it is called frequency modulation. In frequency modulation, only the frequency of the carrier wave is changed in accordance with the signal. However, the amplitude of the carrier wave remains unchanged.
What is Modulation index in Frequency modulation?
Modulation Index is the ratio of the maximum deviation frequency to the frequency of modulation. In other words it is the ratio of the spread in frequency spectrum to the frequency that was used to modulate the carrier. For FM, modulation index is given by the formula mf= df/f where, mf=modulation index for FM df=difference in carrier frequency f=frequency of the signal
What is a difference between amplitude modulation phase modulation frequency modulation?
What is the relation between carrier frequency and modulating signal?
If the modulating system is AM (Amplitude Modulation) then the amplitude of the carrier wave changes with the amplitude of the modulation. On a specrum analyser that shows up as frequency sidebands. If the frequency of the carrier waves depends on the amplitude of the modulating signal that is called FM (frequency modulation). On a spectrum analyser that shows up as sidebands also.
Difference between frequency modulation phase modulation?
Asked in Electronics Engineering, Radio
How does the am radio signals differ from FM radio signals?
The carrier wave of an a.m. transmission is of fixed frequency, and, until modulation is applied, is of fixed amplitude too. When modulation is applied, the amplitude (the strength) of the carrier varies in direct proportion to the amplitude of the modulation, and at the same rate as the frequency of modulation. The amplitude of an f.m. transmission's carrier is fixed, and, until modulation is applied, so is its frequency. When modulation is applied, the frequency of the carrier varies above and below its nominal frequency (the carrier is said to be deviated) at a rate directly proportional to the modulating frequency. The deviation is proportional to the amplitude of the modulation. The louder the modulation, the more the carrier is deviated. Did you know that a.m. and tremolo are the same thing, and that f.m. and vibrato are the same thing?
What is frequency modulation?
frequency modulation stands for FM (on your radio). Better Answer "frequency modulation stands for FM" No it doesn't. On the contrary, f.m. stands for frequency modulation. Frequency modulation is the method of impressing information on an r.f. carrier by changing its frequency back and forth in sympathy with the informatiion signal.
What is difference between modulator and demodulator?
Modulation is used when information is available in analog form that varies the frequency and/or amplitude of a lower frequency wave, depending on the information it carries. The role of modulation is to place this information onto a carrier frequency that can be transmitted more readily and with least loss of information. There are three fundamental types of modulation - frequency modulation, amplitude modulation and phase modulation. In each of these, a carrier frequency is modulated by a lower frequency, to form a modulated carrier wave. A modulator modulates the carrier frequency, while a demodulator detects the modulation on the carrier wave and recovers the original lower frequency waveform at the destination. For many years the modulated carrier wave was converted to a radio signal. Now it is often an electrical signal which is sent down a teleohone line; the information is usually a set of pulses going between computers. When computers are connected to each other in a two-way conversation, the MOdulator and DEModulator are combined into a single device called a MODEM.
Asked in Electronics Engineering
What is the bandwidth of pulse position modulation?
What does FM and AM mean in radio frequencies?
Asked in Electronics Engineering, Physics, Radio
How do carrier waves for a radio station carry information?
Why AM modulation is usd in picture transmission and FM modulation is usd in sound modulation?
In Amplitude modulation, only the amplitude of the carrier wave is changed in accordance with the intensity of signal.However, the frequency of modulated wave remains the same, i.e, carrier frequency.This takes place in transmission of picture. And, in Frequency modulation ,only the frequency of the carrier wave is changed in accordance with the signal.That is why in sound wave transmission FM is used.
Asked in Electronics Engineering, Mumbai, Radio
In which analog-to-analog modulation methods does the peak amplitude of the carrier signal remain unchanged?
What is the deviation ratio for frequency modulation?
Asked in Chrysler LHS, MP3 Players Audio and Sound Systems, The Difference Between, Similarities Between
What is the difference between FM and PM?
Asked in Electronics Engineering
Sound quality between AM and FM?
Why does in modulation the carrier frequency is higher then modulating frequency?