Collocation of electronic equipment on the same vehicle, station, or base.
Note: Equipment so located is often subject to interference because of its proximity to other equipment.

Random noise that originates outside the Earth's atmosphere.
Note: Cosmic noise characteristics are similar to those of thermal noise. Cosmic noise is experienced at frequencies above about 15 MHz when highly directional antennas are pointed toward the Sun or to certain other regions of the sky such as the center of the Milky Way Galaxy. Synonym galactic radio noise.

A phase-locked loop used for carrier phase recovery from suppressed-carrier modulation signals, such as from double-sideband suppressed carrier signals.
Note: In the usual implementation of a Costas loop, a local voltage-controlled oscillator provides quadrature outputs, one to each of two phase detectors, i.e., product detectors. The same phase of the input signal is also applied to both phase detectors and… (Read More →)

Central Office Terminal

Commercial Off-The Shelf

The universal law of attraction and repulsion of electric charges.

1. [An] action, device, procedure, technique, or other measure that reduces the vulnerability of an information system (IS). [INFOSEC-99]
2. Synonymous with Security Measure[CESG].

A conductor or system of conductors used as a substitute for earth or ground in an antenna system. [From Weik '89]

1. In international direct telephone dialing, a code that consists of 1-, 2-, or 3-digit numbers in which the first digit designates the region and succeeding digits, if any, designate the country (click here for a list).
2. In international record carrier transmissions, a code consisting of 2- or 3-letter abbreviations of the country names, or 2- or 3-digit numbers… (Read More →)

A conductor used to extend the ground at an approved building entrance facility to certain types of ac-powered equipment.