(Askeri) ELEKTRONİK MODÜLASYON: Bir telsiz frekans taşıyıcı dalgasına gönderilmekte olan ses veya işaret varyasyonlarına uygun olarak, genişliğini, frekansını veya safhasını değiştirmek suretiyle, istihbarat yükleme işlemi
A process whereby a signal is transformed from its original form into a signal that is more suitable for transmission over the medium between transmitter and receiver
The process of coding and decoding information for transmission For example, a voice conversation is coded into binary bits (digital information), transmitted and then decoded at the receiving end Back to the top
the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect)
the process by which a characteristic of one wave (the carrier) is modified by another wave (the signal)
In electronics, a technique for impressing information (voice, music, picture, or data) on a radio-frequency carrier wave by varying one or more characteristics of the wave in accordance with the signal. There are various forms of modulation, each designed to alter a particular characteristic of the carrier wave. The most commonly altered characteristics include amplitude (see AM), frequency (see FM), phase, pulse sequence, and pulse duration. In music, the transition from one mode or key to another. There are three principal methods of modulation in classical harmony: diatonic, in which a pivot chord is common to both keys; chromatic, in which the notes of the pivot chord are altered by a semitone; and enharmonic, in which the notes of the pivot chord, while retaining their original tones, simply assume different names. Modulation may be transitory, as in the course of thematic development, or structural, contributing to the harmonic definition of the form
The process whereby some characteristic of one wave is varied in accordance with some characteristic of another wave The basic types of modulation are angle modulation (including the special cases of phase and frequency modulation) and amplitude modulation In missile radars, it is common practice to amplitude modulate the transmitted RF carrier wave of tracking and guidance transmitters by using a pulsed wave for modulating, and to frequency module the transmitted RF carrier wave of illuminator transmitters by using a sine wave
The process by which some characteristics of one carrier wave are varied in relation to another wave or signal
The process of varying the amplitude, frequency, or phase of an RF carrier wave The process whereby some characteristic of one wave is varied in accordance with some characteristic of another wave The basic types of modulation are angle modulation, including the special cases of phase modulation and frequency modulation, and amplitude modulation
The act of modulating, or the state of being modulated; as, the modulation of the voice
The process of varying some characteristic (See Amplitude Modulation, Frequency Modulation or Phase Modulation) of the electrical carrier wave to impose information on it
The process of converting digital signals into analog signals by modulating a carrier frequency See also modem
The control of some aspect of a signal, for example its amplitude or frequency, by another signal
{i} action of modulating; variation; variation of carrier wave (Electronics); change from one key to another (Music)
Converting digital signals into analog signals A modem is a MOdulator/DEModulator
When some characteristics of an electromagnetic wave are deliberately changed or manipulated for the purpose of transmitting information (see Amplitude Modulation, Frequency Modulation and Phase Modulation)
To superimpose the amplitude, frequency or phase of a wave or signal onto another wave or signal, which is then used to convey the original signal via a transmission medium (e g satellite link)
In music, one usually thinks of modulating as passing from one key to another--by means of intermediate chords In MIDI, modulation usually means applying a vibrato effect to a sound
the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect) (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase a manner of speaking in which the loudness or pitch or tone of the voice is modified
The methods of modulating or altering the carriers in order to carry the encoded information are quite varied They include amplitude modulation (AM)/ phase modulation (PM), frequency modulation (FM), frequency shift keyed (FSK), pulse position (PPM), pulse duration (PDM) and continuous wave (CW) In some cases, different modulating techniques are used in each direction (to and from the tags)
Variation of a characteristic of a wave, such as tide,, by the instantaneous values of another, modulating wave, eg a by a satellite constituent Amplitude and frequency modulation are the usual effects of such variations
Altering the characteristics of a carrier wave to convey information Modulation techniques include amplitude, frequency, phase, plus many other forms of digital encoding
The process of superimposing the information carried in the baseband signal onto a high-frequency carrier
Process by which the characteristics of electrical signals are transformed to represent information Types of modulation include AM, FM, and PAM See also AM, FM, and PAM
the addition of information to an electronic signal by changing the carrier; common modulation methods include amplitude modulation (AM), frequency modulation (FM) and phase modulation
The process of impressing information on a carrier wave by changing some of the wave's characteristics (such as amplitude, frequency, or phase) to reflect the changes in the information it delivers
anything which changes or modifies gating can cause "modulation" These can include ligand binding to the channel, post-translational modifications like phosphorylation, or changes in the process itself " Certain neurotransmitters such as GABA, serotonin, nitric oxide, and others can modulate ion channels indirectly by binding to other sites on cell membrane They do this by influencing GPCRs By changing the internal ion melieu of the cytoplasm, changes in the cell itself can take place Fatty acids have been shown to bind directly to ion channels and moduate them
Modulation refers to a carrier signal whose amplitude, frequency, or phase is modified according to one of the characteristics of an information signal
A change of key, whether transient, or until the music becomes established in the new key; a shifting of the tonality of a piece, so that the harmonies all center upon a new keynote or tonic; the art of transition out of the original key into one nearly related, and so on, it may be, by successive changes, into a key quite remote
a manner of speaking in which the loudness or pitch or tone of the voice is modified
(electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase
The process in which the characteristics of one wave or signal are varied in accordance with another wave or signal Modulation can alter frequency, phase, or amplitude characteristics
any of a number of techniques whereby a series of information-carrying quantities occurring at discrete instances of time is encoded into a corresponding series of electromagnetic carrier pulses
(Elektrik, Elektronik) Phase modulation (PM) is a form of modulation that represents information as variations in the instantaneous phase of a carrier wave
A modulation method in which the amplitude of one wave (the carrier) is controlled by the amplitude of another wave (the modulator) Unlike Ring Modulation, Amplitude Modulation uses a modulator that is unipolar (i e , always positive) In SFX Machine, the AM modulator is automatically converted to a unipolar signal Low-frequency AM results in volume control or tremolo effects Modulator frequencies that are themselves in the audio range result in sum and difference sideband tones that were not necessarily present in either the carrier or the modulator
(AM) One of three basic ways to add information to a sine wave signal; the magnitude of the sine wave, or carrier, is modified in accordance with the information to be transmitted
(AM) - a modulation technique in which the transmitted radio wave (or more specifically the amplitude of the carrier wave) is varied in accordance with the audio signal being broadcast, distinguished from frequency modulation (FM)
A method of transmitting information by varying the strength of a carrier waveform in accordance with the instantaneous value of the intelligence-bearing signal
One of three basic methods (see also Frequency and Phase Modulation) of adding information to a sine wave signal in which the magnitude of the signal is varied to impose information on it
A form of carrier wave modulation in which the amplitude of the carrier wave is varied in proportion to the amplitude of the modulating wave See also modulation
A type of modulation in which the amplitude of the carrier wave is varied above and below its normal value by an amount proportional to the amplitude of the impressed wave
One of the methods for transmitting information using radio waves by superimposing the information signal onto a radio frequency carrier wave The amplitude of the carrier wave is varied in accordance with the time-varying amplitude of the input signal The frequency of the carrier wave remains unchanged
One of three basic methods (see Frequency and Phase Modulation) of adding information to a sine wave signal in which the magnitude of the signal is varied to transmit information
(AM) The varying of the amplitude of a signal, usually repetitively For signals of audible frequency, amplitude modulations in the range of 1 Hz to ~15 Hz evoke a tremolo effect
Representation of data or signal states by the amplitude of a fixed frequency sinusoidal carrier wave Where data is in binary form the modulation involves two levels of amplitude and is referred to as Amplitude Shift Keying (ASK)
Amplitude is the distance between the peaks and troughs of a waveform and its average value Amplitude modulation is the process of representing information by alternating and controlling the amplitude
The process whereby the amplitude of one electrical quantity is varied in accordance with some selected characteristic of a second quantity, not necessarily electrical (for example, in microwave voice communications, a wave oscillating at the relatively low frequency of sound would be used to vary the amplitude of a continuous high-frequency transmitted carrier wave)
Amplitude Modulation (AM) is a method of transmission whereby the amplitude of the carrier frequency is modified in accordance with the bit value of the intelligence signal
A means of adding voice or data to a radio frequency transmission by varying the amplitude of the carrier frequency Broadcast stations in the "AM" band on a car radio use this modulation technique AM is susceptible to static from electrical sources such as atmospheric noise, thunderstorms and electrical appliances
A transmission technique in which the amplitude of the carrier is varied in accordance with the signal A means of signal transmission whereby transmitter (light source) signal intensity is varied in relation to the amplitude of the input signal
Modulation in which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal (188) Note: Amplitude modulation implies the modulation of a coherent carrier wave by mixing it in a nonlinear device with the modulating signal to produce discrete upper and lower sidebands, which are the sum and difference frequencies of the carrier and signal The envelope of the resultant modulated wave is an analog of the modulating signal The instantaneous value of the resultant modulated wave is the vector sum of the corresponding instantaneous values of the carrier wave, upper sideband, and lower sideband Recovery of the modulating signal may be by direct detection or by heterodyning
A type of modulation in which the frequency of the carrier wave is varied above and below its normal frequency be an amount that is proportional to the amplitude of the impressed signal In this case, the amplitude of the modulated carrier wave remains constant
a modulation technique that varies (i e modulates) the carrier frequency of a transmitter in accordance with variations in the strength of the modulating audio signal
A method of modulation in which the frequency of the carrier voltage is varied with the frequency of the modulation voltage (Also see Amplitude Modulation) 2
A type of modulation in which the frequency of a continuous radio carrier wave is varied in accordance with the properties of a second (modulating) wave
A method of data transmission whereby the frequency of a sinusoidal waveform (carrier) is changed in accordance with the information that is to be transmitted
French: modulation de fréquence (FM) The process of modifying the frequency of a carrier wave in step with the amplitude variations of the signal to be transmitted
A modulation method in which the frequency of one wave (the carrier) is controlled by the amplitude of another wave (the modulator) Low-frequency FM results in vibrato Modulator frequencies that are themselves in the audio range result in the generation of sideband tones that are not necessarily present in either the carrier or the modulator
Representation of data or signal states by using different transmission frequencies Where data is in binary form the modulation constitutes two transmission frequencies and is referred to as Frequency Shift Keying (FSK)
Placing a sound wave on a carrier wave in such a way that the number of recurrences is varied; stations that broadcast between 88 and 108 megahertz 1 14, 14 6
A change in the frequency (pitch) of a signal At low modulation rates, FM is perceived as vibrato or some type of trill, depending on the shape of the modulating waveform When the modulating wave is in the audio range (above 20Hz or so), FM is perceived as a change in tone color FM synthesizers, commonly found on computer soundcards, create sounds using audio-range frequency modulation
A means of adding voice or data to a radio frequency transmission by varying the carrier frequency Broadcast stations in the 88-108 MHz "FM" band and television station sound channels use this modulation technique FM is relatively insensitive to the static sources that AM is prone to
A form of modulation in which the frequency of the modulated carrier wave is varied in proportion to the amplitude of the modulating wave In this case the phase of the carrier varies with the integral of the modulating wave See also modulation
(FM) A form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal See also amplitude modulation (AM)
In addition to being a basic synthesizer technique used by some synthesizers, many synthesizers have a feature which allows you to modulate the frequency (pitch) of an oscillator or filter, producing rich and complex tones Also known as FM
One of three basic methods (see also Amplitude and Phase Modulation) of adding information to a sine wave signal in which its frequency is varied to impose information on it
Modulation in which the instantaneous frequency of a sine wave carrier is caused to depart from the center frequency by an amount proportional to the instantaneous value of the modulating signal (188) Note 1: In FM, the carrier frequency is called the center frequency Note 2: FM is a form of angle modulation Note 3: In optical communications, even if the electrical baseband signal is used to frequency-modulate an electrical carrier (an "FM" optical communications system), it is still the intensity of the lightwave that is varied (modulated) by the electrical FM carrier In this case, the "information,"as far as the lightwave is concerned, is the electrical FM carrier The lightwave is varied in intensity at an instantaneous rate corresponding to the instantaneous frequency of the electrical FM carrier [After FAA]
To modulate an activity or process means to alter it so that it is more suitable for a particular situation. These chemicals modulate the effect of potassium. + modulation modulations modu·la·tion The famine turned the normal modulation of climate into disaster
If you modulate your voice or a sound, you change or vary its loudness, pitch, or tone in order to create a particular effect. He carefully modulated his voice
vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves) adjust the pitch, tone, or volume of change the key of, in music; "modulate the melody
Method of sampling information signals at regular intervals and transmitting the samples as a series of pulses in coded form which represent the amplitude of the information signal at that time
French: modulation par impulsions et codage (MIC) A modulation technique in which the signal being transmitted is sampled at regular intervals to determine its magnitude The magnitude is converted to a digital pulse for transmission (See pulse modulation )
The most common method of representing an analog signal, such as speech, by sampling at a regular rate and converting each sample to an equivalent digital code
A method of encoding and de-encoding a digital signal There are actually several varieties in use today, including linear, non-linear, floating point, and differential These vary mainly in how they deal with quantization, and how they handle values that fall "between" the digital signals bits
Method of modulation in which signals are sampled and converted to digital words that are then transmitted serially Most PCM systems use either 7- or 8-bit binary codes There are, however, several standards for PCM coding: most common are µ-Law in North America and A-Law in Europe (both based on logarithmic conversion of the signal)
A method of quantizing audio-range analog signals into a digital form for transmission in digital communications systems, or for processing in DSP Effectively the same as analog-to-digital conversion
A method used to convert an analog signal into noise-free digital data that can be stored and manipulated by computer PCM takes an 8-bit sample of a 4kHz bandwidth 8000 times a second, which gives 16K of data per second PCM is often used in multimedia applications
A process in which a signal is sampled, and the magnitude of each sample with respect to a fixed reference is quantized and converted by coding to a digital signal
PCM is the most common method a telephone company in North America can use to sample a voice signal and convert that sample in an equivalent digital code consisting of zeros and ones
Process in which the modulating signal is sampled, and the magnitude of each sample (with respect to a fixed reference) is quantized and converted by coding to a digital signal Provides undistorted transmission, even in the presence of noise The sample frequency must be at least twice the highest modulating frequency for full recovery of the original modulating information