a structural derivative of a parent compound that often differs from it by a single element
an organ or structure that is similar in function to one in another kind of organism but is of dissimilar evolutionary origin
A mode of transmission in which information is represented by a continuously variable electrical signal
The traditional method of modulating radio signals so that they can carry information AM (amplitude modulation) and FM (frequency modulation) are the two most common methods of analog modulation Is a Circuit-Switched system that divides geographic areas into small areas called cells A cellular tower is built within each cell site Each tower's coverage is 1 mile to 20 miles in diameter A central computer in the system provider's office monitors the weakness/strength of the radio signals that emanate from a cell phone and can switch the cell signal from tower to tower as needed Also the system can switch the cell call into the public telephone system Each cell user occupies an entire frequency (no-sharing) and there are a limited number of users allowed per tower Frequency for Analog is 800 MHz (Back to top )
A continuously varying electronic signal Audio and video analog signals stored on tape deteriorate with each copy or generation In contrast see digital
A format in which information is transmitted by modulating a continuous signal, such as a radio wave (See also: Digital)
Information represented continuously (without steps) Because computers require digital information, analog-to-digital converters are available to "condition" analog data before it is sent to a computer A watch with hands is usually analog One with only numbers is digital
The transmission of sound and visual information in the form of waves in the frequency spectrum For example, in an analog telephone transmission the human voice is transmitted as sound waves that can be detected by the ear "Analog" transmission is now being superseded by "digital" forms of transmission in many instances
Describes any device that represents changing values by a continuously variable physical property such as voltage in a circuit, fluid pressure, liquid level, and son on An analog device can handle an infinite number of values within its range By contrast, a digital device can only manage a fixed number of possible values For example, an ordinary mercury thermometer is an analog device, and can record an infite number of readings over its range A digital thermometer, on the other hand, can only display temperature in a fixed number of individual steps A method of signal representation by an infinitely smooth universe of numeric values Measurements that are characterized as analog include readings of voltage and current Compare with digital
of a circuit or device having an output that is proportional to the input; "analogue device"; "linear amplifier"
A transmission method that employs continuous electrical signals that vary in amplitude or frequency Traditional telephone service uses analog technology
Adjective referring to the use of information in a continuous, rather than discrete (digital), form For example, an analog telephone transmits and receives voice as a continuous voltage wave form See Digital
A transmission mode in which data is represented by a continuously varying electrical signal
Quantities or representations that are variable over a continuous range such as output of an amplitude-modulated, single-sideband transmitter The amplitude as such a signal fluctuates over a continuous range from zero to the maximum, or peak, output
{i} item which is analogous to another; organ that differs in structure from another but performs the same function (Biology); chemical compound that has a similar structure to another but differs in its composition (Chemistry)
Dealing with a continuous spectrum of values as opposed to a discrete on/off value