A signal that can assume, at any given instant, one of three significant conditions, such as power level, phase position, pulse duration, or frequency.
Note: Examples of ternary signals are (a) a pulse that can have a positive, zero, or negative voltage value at any given instant, (b) a sine wave that can assume phases of 0°, 120°, or 240°… (Read More →)

A network of terrestrial beacon signal transmitters that enable a receiver's position to be determined. TBS is included in the LTE Positioning Protocol (LPP) 3GPP TS
3
6. 355 starting with Release 13.

Any radiocommunication other than space radiocommunication or radio astronomy. [NTIA] [RR] [47CFR]

A station effecting terrestrial radiocommunication. [47CFR] In these [Radio] Regulations, unless otherwise stated, any station is a terrestrial station. [NTIA] [RR]

Timed Efficient Stream Loss-tolerant Authentication

Physical measurements taken (a) to verify conclusions obtained from mathematical modeling and analysis or (b) for the purpose of developing mathematical models.

An antenna of known performance characteristics used in determining transmission characteristics of equipment and associated propagation paths.

See patch and test facility, technical control facility.

Key intended for testing of COMSEC equipment or systems. [INFOSEC-99]

A point within a piece of equipment or an equipment string that provides access to signals for the purpose of fault isolation.