- 업종: 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 a transmission path, the maximum instantaneous signal power, voltage, or current at any point. 2. At a given point in a transmission path, the maximum instantaneous signal power, voltage, or current that occurs during a specified period.
Industry:Telecommunications
In a transmission path or device, that noise inherent to the path or device and not contingent upon modulation.
Industry:Telecommunications
In a transmission path or device, noise, generated during modulation and demodulation, that results from nonlinear characteristics in the path or device.
Industry:Telecommunications
In a transmission line, a wave in which the distribution of current, voltage, or field strength is formed by the superposition of two waves propagating in opposite directions, and which wave is characterized by a series of nodes (maxima) and anti-nodes (minima) at fixed points along the transmission line. Note: A standing wave may be formed when a wave is transmitted into one end of a transmission line and is reflected from the other end by an impedance mismatch, i.e., discontinuity, such as an open or a short. Synonym stationary wave.
Industry:Telecommunications
In a transmission line, the ratio of maximum to minimum voltage in a standing wave pattern. Note: The VSWR is a measure of impedance mismatch between the transmission line and its load. The higher the VSWR, the greater the mismatch. The minimum VSWR, i.e., that which corresponds to a perfect impedance match, is unity.
Industry:Telecommunications
In a transmission line, the rate of change of attenuation with respect to frequency over the frequency spectrum. Note 1: The slope is usually expressed in dB per hertz or dB per octave. Note 2: In metallic lines, the slope is usually greater at high frequencies than at low frequencies.
Industry:Telecommunications
In a transmission line, an echo propagating in the same direction as the original wave and consisting of energy reflected back by one discontinuity and then forward again by another discontinuity. Note: Forward echoes can be supported by reflections caused by splices or other discontinuities in the transmission medium (e.g., optical fiber, twisted pair, or coaxial tube. ) In metallic lines, they may be supported by impedance mismatches between the source or load and the characteristic impedance of the transmission medium.
Industry:Telecommunications
In a transmission line, a wave in which the distribution of current, voltage, or field strength is formed by the superposition of two waves propagating in opposite directions, and which wave is characterized by a series of nodes (maxima) and anti-nodes (minima) at fixed points along the transmission line. Note: A standing wave may be formed when a wave is transmitted into one end of a transmission line and is reflected from the other end by an impedance mismatch, i.e., discontinuity, such as an open or a short. Synonym stationary wave.
Industry:Telecommunications
In a tape-relay communications system, a service message, usually sent to a relay station or to a tributary station, that contains a request to the operator to resume transmitting over a specified channel or channels. Synonyms go-ahead message, start message, start notice.
Industry:Telecommunications
In a time-division multiplexer, the bit rate that is equal to the sum of (a) the input channel data signaling rates available to the user and (b) the rate of the overhead bits required.
Industry:Telecommunications
