Glossary:

ATIS Telecom Glossary

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standing wave

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… (Read More →)

standing wave ratio (SWR)

The ratio of the amplitude of a standing wave at an anti-node (minimum) to the amplitude at an adjacent node (maximum).
Note 1: The standing wave ratio (SWR) in a uniform transmission line is given by where is the reflection coefficient.
Note 2: Reflections occur as a result of discontinuities, such as an imperfection in an otherwise uniform transmission line,… (Read More →)

star (*) property

1. [The] Bell-La Padula security model rule allowing a subject write access to an object only if the security level of the object dominates the security level of the subject. [INFOSEC-99]
2. A Bell-LaPadula security model rule allowing a subject write access to an object only if the security level of the subject is dominated by the security level of… (Read More →)

star coupler

A passive optical coupler having a number of input and output ports, used in network applications.
Note: An optical signal introduced into any input port is distributed to all output ports. Because of the nature of the construction of a passive star coupler, the number of ports is usually a power of 2; i.e., two input ports and two output… (Read More →)

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