A measure of the thermal noise generated in the first stage of a receiver.

A programmed-logic or stored-program device that interfaces data communication equipment with an input/output bus or memory of a data processing computer.

1. [A] security filter logically separated from the remainder of an information system (IS) to protect system integrity. Synonyms [loosely] firewall, proxy. [INFOSEC-99]
2. A process that is invoked to process data according to a specified security policy prior to releasing the data outside the processing environment or upon receiving data from an external source [TCSEC].

1. Of an antenna, the gain in a specified direction, i.e., azimuth, usually that of maximum gain, compared to the gain in a direction 180° from the specified azimuth.
Note: Front-to-back ratio is usually expressed in dB.
2. A ratio of parameters used to characterize rectifiers or other devices, in which electrical current, signal strength, resistance, or other parameters, in… (Read More →)

Full Service Access Network

Abbreviation for filtered symmetric differential phase-shift keying.

Abbreviation for frequency-shift keying.

Abbreviation for file transfer, access, and management.

File Transfer Protocol

A collection of files that are available by using file transfer protocol (FTP). Synonyms file archive, file site.