A unit that supports transmission of signals over the air interface. [After T
1. Rpt34-1994]

A controller that provides an interface between one or more subtending radio port intermediaries and a PCS switching center, and supports air interface independent radio frequency transmission and reception functions. [After T
1. Rpt34-1994]

1. The distance from a transmitter at which the signal strength remains above the minimum usable level for a particular antenna and receiver combination.
2. A radio aid to air navigation that creates an infinite number of paths in space throughout a given sector or azimuth angle by various methods of transmission and reception of electromagnetic waves. [From Weik '89]

A radionavigation land station in the aeronautical radionavigation service providing radial equisignal zones. (In certain instances a radio range station may be placed on board a ship. ) [NTIA]

See identification, friend or foe.

As used in legal documents, the latest (i.e., as of the document date) ITU Radio Regulations to which the United States is a party.

A permanent organization of the International Telecommunication Union (ITU) that implements frequency assignment policy and maintains the Master International Frequency Register (MIFR).
Note: Formerly International Frequency Registration Board (IFRB).

1. The reception and retransmission by a radio station of signals that are received either from another radio station or from a wire, fiber optic, microwave, coaxial cable, or other link of an integrated land line and radio communications system component.
2. A terrestrial point-to-point communications system, such as a microwave-relay communications system or a satellite communications system.
Note: The… (Read More →)

A point-to-point radio transmission system in which signals are received, conditioned, and retransmitted by one or more intermediate radio stations.

The transmission of telegraphic codes by means of radio. [JP 1-02]