General telecom

General telecom

Terms relating to telecommunication or communication through technological means.

Industry: Telecommunications

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General telecom

Rubidium standard

Telecommunications; General telecom

A frequency standard in which a specified hyperfine transition of electrons in rubidium-87 atoms is used to control the output frequency. Note: A rubidium standard consists of a gas cell, which has ...

Secondary frequency standard

Telecommunications; General telecom

A frequency standard that does not have inherent accuracy, and therefore must be calibrated against a primary frequency standard. Note: Secondary standards include crystal oscillators and rubidium ...

Military common emergency frequency

Telecommunications; General telecom

A frequency that (a) is used by all military units that are equipped to operate at that frequency or in the band in which that frequency lies and (b) is also used internationally by survival-craft ...

Authorised frequency

Telecommunications; General telecom

A frequency that is allocated and assigned by a competent authority to a specific user for a specific purpose. 2. The frequency, or frequency range, assigned to a station by the Commission and ...

Primary frequency

Telecommunications; General telecom

A frequency that is assigned for usual use on a particular circuit. 2. The first-choice frequency that is assigned to a fixed or mobile station for radiotelephone communications.

Precise frequency

Telecommunications; General telecom

A frequency that is maintained to the known accuracy of an accepted reference frequency standard. Note: Current uncertainty among international standards is approximately 1 part in 1014 as of 1995.