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Analog Modulation Techniques 
AM and FM radio to illustrate how a signal is sent via AM or FM radio
AM modulation AM modulation, upper side band, lower side band, carrier
Amplitude Modulation To show the effect of modulating a sine wave with another sine wave
Amplitude modulation amplitude modulation was the original method used for transmitting audio signals over radio frequency waves. It is still used today in AM radio. This applet demonstrates the modulation process
Amplitude modulation 2 The applet shows an amplitude modulated signal
Amplitude modulation 3 simulation of AM
Amplitude modulation 3 simulation of AM
Amplitude modulation
AM-FM modulation - AM demodulation in amplitude modulation the amplitude of a slowly varying signal is impressed onto the amplitude of a rapidly varying signal
Démodulation d'amplitude
Double sideband modulation double sideband modulation, DSB, Educypedia
DSB Double side band Suppressed Carrier System (DSB/SC)
FDM: Frequency Devision Multiplex
FM spectra the spectrum generated by an FM pair centers on the carrier frequency, with sidebands found at multiples of the modulating frequency added and subtracted from the carrier. The power at each sideband is determined by the index of modulation (modAmp/modFreq) and a Bessel function, Frequency modulation and Bessel functions
Foxhole Radio What is the Foxhole Radio? What are the Components?
Frequency and Phase Modulation
Frequency modulation
Frequency modulation Frequency modulation is the process of varying the frequency of a carrier wave in proportion to the instantaneous amplitude of the modulating signal, ...
Frequency modulation in frequency modulation the amplitude is kept constant and the frequency is modulated by the amplitude of the modulating signal
Frequency Modulation Frequency modulation is a technique in which the carrier's frequency The number of cycles a radio wave completes in a given period of time. varies in response to changes in the modulating signal. For a variety of technical reasons, conventional FM Frequency Modulation generally produces more pleasing audio than AM Amplitude Modulation, but uses much more bandwidth
Frequency modulation and Bessel functions the spectrum of a frequency modulated signal must be determined using Bessel functions
Frequency modulation fundamentals
Frequency modulation frequency modulation, FM
Modulation AM
Modulation AM Italian
Modulation AM et FM en Français
Modulations d'amplitude et de fréquence en Français
Modulations d'amplitude et de fréquence en Français
Modulation d'amplitude en Français
Modulation FM Italian
Modulation Techniques This simulation will show the waveform generated by different modulation techniques: digital modulation, frequency modulation, FM, amplitude modulation, AM, Combinations of AM and PSM, Quadrature Amplitude Modulation, phase shift modulation
Phase and Frequency Modulation Phase and Frequency Modulation, To give an overview of two angle modulation methods (phase modulation and frequency modulation)
Phase Modulation Phase Modulation, PM
Power Content of Frequency Modulation and Phase Modulation This Demonstration illustrates frequency modulation (FM) and phase modulation (PM) using one sinusoidal tone as the modulating signal
Power Efficiency Of Amplitude Modulation This Demonstration illustrates the effect of changing the modulation factor (also called the modulation depth) on the power efficiency of ordinary amplitude modulation (AM) technique. A modulation factor greater than 1 results in envelope distortion, causing difficulties during demodulation
Single side band demodulation in single-side-band demodulation, the carrier is reinserted before the modulation signal is extracted using envelope detection. The amplitude of the reinserted carrier determines how close the demodulated signal is to the original modulating signal
Single sideband modulation single sideband modulation, SSB
Single Side band suppressed Carrier Single Side band suppressed Carrier (SSB/SC) Filter method of producing SSB/SC signals. In a more efficient technique, single sideband, the carrier A radio wave that has been modulated to carry information. and one of the sidebands Radio signals whose frequencies are the sum and difference of the original Radio Frequency and Audio Frequency signals. are suppressed. Only the remaining sideband, either upper or lower, is transmitted. An SSB single sideband signal needs only half the bandwidth of an AM Amplitude Modulation signal and is produced only when a modulating signal is present. Thus, SSB systems are more efficient both in the use of the spectrum, which must accommodate many users, and of transmitter power. Almost all of the transmitted power goes into the information-carrying sideband
Spectre d'un signal modulé en amplitude en Français
Spectre d'un signal modulé en fréquence en Français

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Last updated on: 2011-01-02 | Copyright © 2011-2013 Educypedia.