Abbreviation for antenna gain-to-noise-temperature.

Generic Authentication Architecture

The ratio of output current, voltage, or power to input current, voltage, or power, respectively.
Note 1: Gain is usually expressed in dB.
Note 2: If the ratio is less than unity, the gain, expressed in dB, will be negative, in which case there is a loss between input and output.

See hit.

An active medium, device, or system in which amplification of input occurs with or without feedback.
Note: Gain media include amplifiers, lasers, and avalanche photodiodes (APDs).

Synonym antenna gain.

Synonym cosmic noise.

In video, the insertion of a nonlinear output-input characteristic for the purpose of changing the system transfer characteristic. [IEEE 100]
Note: Historically, gamma correction was a precompensation applied to the video signal at the camera to correct for the nonlinearities of the CRT (i.e., the power function of the electron gun) and, as such, it was the inverse of the… (Read More →)

A period of low energy content signals present of a digital speech interpolation device. [T1.509-1995]

1. The power loss that occurs when an optical signal is transferred from one fiber to another that is axially aligned with it, but longitudinally separated from it.
Note: The gap allows light from the "transmitting" fiber to spread out as it leaves the fiber endface. When it strikes the "receiving" fiber, some of the light will enter the cladding,… (Read More →)