- Industry: Telecommunications
- Number of terms: 29235
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
In the Telecommunications Service Priority system, the level that may be assigned to an NS/EP telecommunications service, which level specifies the order in which provisioning or restoration of the service is to occur relative to other NS/EP or non-NS/EP telecommunication services. Note: Priority levels authorized are designated (highest to lowest) "E," "1," "2," "3," "4," and "5" for provisioning and "1," "2," "3," "4," and "5" for restoration. Synonym yypriority.
Industry:Telecommunications
In the transition of any parameter from one value to another, the transitory value of the parameter that exceeds the final value. Note: Overshoot occurs when the transition is from a lower value to a higher value. When the transition is from a higher value to a lower value, and the parameter takes a transitory value that is lower than the final value, the phenomenon is called undershoot. 2. The increased amplitude of a portion of a nonsinusoidal waveform, i.e., signal, at the output of a nonlinear circuit, e. G. , a realizable amplifier, caused by the characteristics of the circuit. Note 1: Overshoot causes distortion of the signal. Note 2: Overshoot may result from circuit design parameters that are intended to decrease the response time of the circuit. Note 3: The amount of overshoot in a given circuit is designed to minimize response time while maintaining distortion of the signal within acceptable limits. The absence or presence of overshoot, and if present, its magnitude, is a function of a circuit design parameter called damping. 3. The result of an unusual atmospheric, e. G. , ionospheric, condition that causes microwave signals to be received where they are not intended.
Industry:Telecommunications
In the transmission of a single-frequency wave from one point to another, the delay of an arbitrary point in the wave that identifies its phase. Note: Phase delay may be expressed in any convenient unit, such as seconds, degrees, radians, or wavelengths.
Industry:Telecommunications
In the transmission of a single-frequency wave from one point to another, the delay of an arbitrary point in the wave that identifies its phase. Note: Phase delay may be expressed in any convenient unit, such as seconds, degrees, radians, or wavelengths.
Industry:Telecommunications
In the transmission of binary or teletypewriter signals, keying in which the carrier frequency is shifted in one direction for marking signals and in the opposite direction for spacing signals. 2. In amplitude modulation, a condition that results from imperfect modulation in which the positive and negative excursions of the modulating envelope are unequal in amplitude. Note 1: The carrier shift results in a change in carrier power. Note 2: The carrier shift may be a shift to a higher or to a lower frequency.
Industry:Telecommunications
In the transmission of data frames, a distinctive sequence of bits used to accomplish frame alignment. Note: A frame-alignment signal may also contain additional bits for status, control, and error detection.
Industry:Telecommunications
In the transmission of data, the excess of transmitted message symbols over that required to convey the essential information in a noise-free circuit. Note: Redundancy may be introduced intentionally (as in the case of error detection or correction codes) or inadvertently (such as by oversampling a band-limited signal, inefficient formats, etc. ) 2. In a communication system, surplus capability usually provided to improve the reliability and quality of service.
Industry:Telecommunications
In the transmission of electrical, electromagnetic, or acoustic signals, the conversion of the transmitted energy into another form, usually thermal. Note 1: Absorption is one cause of signal attenuation. Note 2: The conversion takes place as a result of interaction between the incident energy and the material medium, at the molecular or atomic level.
Industry:Telecommunications
In the transmission of electrical, electromagnetic, or acoustic signals, the conversion of the transmitted energy into another form, usually thermal. Note 1: Absorption is one cause of signal attenuation. Note 2: The conversion takes place as a result of interaction between the incident energy and the material medium, at the molecular or atomic level.
Industry:Telecommunications
In the transmission of electromagnetic signals, attenuation caused by absorption and scattering by water or ice particles in clouds. Note: The amount of cloud attenuation depends on many factors, including (a) the density, particle size, and turbulence of the clouds and (b) the transmission path length in the clouds.
Industry:Telecommunications
