An analog signal is a continuously variable representation of a physical quantity, property, or condition such as pressure, flow, temperature, etc. The signal may be transmitted as pneumatic1 mechanical, or electrical energy.
Analog signals are produced by most security cameras. Analog signals are continuously variable, and are greatly affected by ‘noise' (disturbances) within the system, and recordings of analog information (such as videotapes) degrade over time. This doesn't occur with digital signals recorded on media like CDs, DVDs and computer hard drives.
A signal that has a continuous nature rather than a pulsed nature (I.E. digital signal). For example, an analog signal may vary in frequency, phase, or amplitude in response to changes in physical phenomena, such as sound, light (video), etc.
Electrical representation of sound waves.
A nominally continuous electrical signal that varies in amplitude or frequency
Signal in which the amplitude value varies with time.
Representation of data by continuously varying quantities.
An electrical signal that varies continuously over an infinite range of voltage or current values, as opposed to a digital signal, which varies discretely be-tween two values, usually one and zero. It is easiest to think of analog signals as sine waves of various sizes.
A signal, such as voice, that varies in a continuous manner.
A (video) signal, one of whose characteristic quantities follows continuously the variations of another physical quantity representing information.
In wirless telecommunications, a continuous signal that reflects variations in loudness of a human voice.
A continuously variable signal. Voice signals on telephone lines are analog, i.e. transmitted electronically in a form analogous to the spoken form.
A signal that varies continuously over time rather than being sent and received in discrete intervals. Digital signal-is a signal that is sent and received in discrete intervals.
A signal that travels continuously. An analog signal may be either direct or alternating current.
Most CCTV cameras, although internally working with digital components, produce a standard analog signal. This is where the image is represented by a variable voltage level and frequency timings. In the USA, the standard used is called NTSC. In the UK and Europe, the standard for the analog signal output from CCTV cameras is called PAL.
Continuously varying with an amplitude which is an analog of the original information, and thus may have virtually n infinite numbers of states. Contrasted with a digital signal which has only a very limited number of discrete states.
A signal that continuously represents a variable or condition.
A continuously varying signal, as opposed to a discretely varying (digital) signal.
a continuously varying voltage or current
a continuous transmission wave
a continuous wave pattern that varied in frequency or amplitude to convey data
a form of propagated energy, such as a sound wave, that vibrates the medium it travels through
a kind of signal that is continuously variable, as opposed to having a limited number of steps along its range (called digital )
an electronic signal that is defined by means of a steady flow of electric current that is modulated to different frequencies, voltages and amplitudes
an unprocessed signal that represents a quantity that varies over any continuous range of values
a signal that can be continuously, or infinitely, varied to represent any small amount of change
a signal that varies continuously between a maximum and minimum value
a waved-shaped signal that represents information in a continuously variable and directly measurable physical quantity, such as voltage
An electrical signal that varies continuously in amplitude or frequency with the information being transmitted (eg. speech or sound waves).
A signal representing a variable which may be continuously observed and continuously represented.
Describes a continuously variable signal of some sort. Commonly used to describe equipment or methods that do not involve the electronic digitization of a signal into data. Examples are can be found in Audio Recording (Vinyl Records, Cassette tapes), Video Recording (BetacamSP, VHS), and Broadcasting (AM, FM, Conventional TV).
A continuously variable waveform (such as a sound wave) that can represent an infinite number of values; wireline telephone systems use analog signals to provide voice communication. The term "analog" is used to refer to telephone transmission and/or switching that is not digital. Analog signals are amplified rather than regenerated.
A signal measurement over time that is continuous.
A signaling method that uses continuous changes in the amplitude or frequency of a radio transmission to convey information.
Signal in the form of a continuous wavelike pattern representing a physical quantity, such as voltage, which reflects variations in some quantity, such as loudness of the human voice. Analog signaling is generic to the public switched telephone network (PSTN), as well as to certain other audio-frequency and radio-frequency facilities. A digital baseband signal generated by a business machine must be converted to analog form in order to transmit that signal over an analog facility, e.g., a voice grade telephone line.
An electronic signal that has a continuous range of signal levels.
An electrical signal whose voltage continuously and proportionately varies in amplitude over time to represent the information being carried or stored.
any form of data transmission where the pneumatic, mechanical, or electrical energy signal is varied in direct proportion to the intensity of the physical quantity, property, or condition represented.
The principal feature of analog signals is that they are continuous. In contrast
A continuous signal that reflects the variation in the phenomenon being measured or represented, such as voice, temperature, pressure, intensity of light, electrical flows, etc. To be used in computers, analog signals, such as those in communications, must first be modulated into digital code strings.
A continuous electrical signal in the form of waves that vary as the source of the information varies.
A type of signal that encodes voice, video, or data transmitted over wire or through the air, and is commonly represented as an oscillating wave. An analog signal can take any value in a range and changes smoothly between values, as opposed to digital signals, which is characterized by discrete bits of information in numerical steps. An analog signal can transmit analog or digital data.
A signal in the form of a continuous varying physical quantity (e.g., loudness in the human voice).
A signal in which pixel information is relayed via waves of fluctuating voltage. This is the standard means of transmitting data to a monitor.
An electrical signal that varies in amplitude within a given parameter
An analog signal exists as a continuous electrical signal varying in direct correlation to either an impressed phenomenon, stimulus, or an event bearing intelligence. Sound waves and their electrical analogs have two distinct characteristics, loudness (amplitude) and pitch. Analog signals can assume any infinte number of amplitude values or states within a specified range and in analogous to or in accordance with an impressed stimulus. The pitch refers to the number of times per second the signal swings between low and high amplitudes (in other words, its frequency).
A continuously variable and varying signal. The communications devices and systems we are the most familiar with, such as video cameras and radio stations, both produce and process analog signal.
A signal often transmitted over telephone lines in the form of electronic waves.
A signal that is solely dependent on magnitude to express the information content.
The continuous waveform signal created by the infinite number of varying frequencies.
An electrical signal which varies continuously, not having discrete values. Analog signals are copies or representations of other waves in nature. An analog audio signal, for instance, is a representation of the pressure waves which make up audible sound.
Analog signals are continuous where as digital signals consist of values measured at separate intervals.
The standard method for broadcasting in AM and FM. The carrier wave is modulated in a way that mirrors the source signals. As the music gets louder, for example, an AM wave increases in power, while an FM wave moves to a higher frequency. Atmospheric can interfere with analog signals, slightly altering the content. This results in a slight hiss often heard in the background, and — in the case of electrical storms — crackle and bursts of static. The physical environment can also cause interference, creating multipath distortion.
A continuous wave form signal that can be used to represent such things as sound, temperature, and velocity. (See also digital signal.)
The exact electrical or mechanical replica of any particular audio or video input to a system. Any signal originally produced by non-digital recording equipment, even though the finished item may be a digital audio disc or a digitally compressed video signal. Note that no matter what the recording medium, the sound or picture we ultimately experience is analog. We live in a subjectively analog world.
An analog or analogue is any variable signal continuous in both time and amplitude. It differs from a digital signal in that small fluctuations in the signal are meaningful. Analog is usually thought of in an electrical context, however mechanical, pneumatic, hydraulic, and other systems may also convey analog signals.