reference signal

См. также в других словарях:

• Signal-to-noise ratio — For signal to noise ratio in statistics, see Cohen s d. Signal to noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined… …   Wikipedia

• Signal integrity — or SI is a measure of the quality of an electrical signal. In digital electronics, a stream of binary values is represented by a voltage (or current) waveform. Over short distances and at low bit rates, a simple conductor can transmit this with… …   Wikipedia

• Signal processing — is an area of systems engineering, electrical engineering and applied mathematics that deals with operations on or analysis of signals, in either discrete or continuous time. Signals of interest can include sound, images, time varying measurement …   Wikipedia

• Signal strength — In telecommunications, particularly in radio, signal strength refers to the magnitude of the electric field at a reference point that is a significant distance from the transmitting antenna. It may also be referred to as received signal level or… …   Wikipedia

• Signal compression — In telecommunication, the term signal compression has the following meanings: In analog (usually audio) systems, reduction of the dynamic range of a signal by controlling it as a function of the inverse relationship of its instantaneous value… …   Wikipedia

• Signal transduction — In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another. Most processes of signal transduction involve ordered sequences of biochemical reactions inside the cell, which are… …   Wikipedia

• Reference tone — A reference tone is a pure tone corresponding to a known frequency, and produced at a stable sound pressure level (volume), usually by specialized equipment.In mediaThe most common reference tone in audio engineering is a Audio|1000Hz.ogg|1000 Hz …   Wikipedia

• Signal level — In a communications system, the signal level is the signal power or intensity at a specified point and with respect to a specified reference level, e.g., 1 mW.It is also the rms signal level of a voltage, e.g., 0.775 VRMS is 0 dBu. From Federal… …   Wikipedia

• Reference beam — A reference beam is a laser beam used to read and write holograms. It is one of two laser beams used to create a hologram. In order to read a hologram out, some aspects of the reference beam (namely its angle of incidence, beam profile and… …   Wikipedia

• Signal beam — A signal beam or object beam is one of at least two laser beams used to write holograms. The signal beam is the beam that carries the information to be stored in the hologram. In the case of a holographic picture, this beam is reflected off the… …   Wikipedia

• Reference clock — In telecommunication, the term reference clock has the following meanings: * A clock with which another clock is compared. * A clock, usually of high stability and accuracy, used to govern a network of mutually synchronized clocks of lower… …   Wikipedia