Synonym far-field region.

Synonym far-field region.

An indication returned to a transmitting node (source) that an errored block has been detected at the receiving node (sink). [T1.105-1988]

Crosstalk that is propagated in a disturbed channel in the same direction as the propagation of a signal in the disturbing channel.
Note: The terminals of the disturbed channel, at which the far-end crosstalk is present, and the energized terminals of the disturbing channel, are usually remote from each other.

An associated, loop signaling, customer installation located at the far end of the network transmission path from the network interface (NI) described in the designated document. [T1.407-1990]

An indication returned to a transmitting link terminating equipment (LTE) upon receipt of a line AIS (alarm indication signal) code or detection of an incoming line failure at the receiving LTE. [T1.105-1988]

The diffraction pattern of a source (such as an LED, ILD, or the output end of an optical fiber) observed at an infinite distance from the source.
Note 1: A far-field pattern exists at distances that are large compared with s2/, where s is a characteristic dimension of the source and is the wavelength. For example, if the source is… (Read More →)

A radiation pattern measured at the far field of an antenna or other emitter.

The region where the angular field distribution is essentially independent of distance from the source.
Note 1: If the source has a maximum overall dimension D that is large compared to the wavelength, the far-field region is commonly taken to exist at distances greater than 2D2/ from the source, being the wavelength.
Note 2: For a beam focused at infinity,… (Read More →)

A magneto-optic effect in which the polarization plane of an electromagnetic wave is rotated under the influence of a magnetic field parallel to the direction of propagation.
Note: The Faraday effect may be used to modulate a lightwave.