What is FREQUENCY REFERENCE? What does FREQUENCY REFERENCE mean? FREQUENCY REFERENCE meaning

What is FREQUENCY REFERENCE? What does FREQUENCY REFERENCE mean? FREQUENCY REFERENCE meaning - FREQUENCY REFERENCE definition - FREQUENCY REFERENCE explanation.

A frequency reference is an instrument used for providing a stable frequency of some kind. There are different sorts of frequency references, acoustic ones such as tuning forks but also electrical ones that emit a signal of a certain frequency (a frequency standard).

Among the most stable frequency references in the world are cesium standards, including cesium fountains, and hydrogen masers. Cesium standards are widely recognized as having better long-term stability, whereas hydrogen masers can attain superior short-term performance; therefore, several national standards laboratories use ensembles of cesium standards and hydrogen masers in order to combine the best attributes of both.

The carrier of time signal transmitters, LORAN-C transmitters and of several long wave and medium wave broadcasting stations is derived from an atomic clock and can be therefore used as frequency standard. ... https://www.youtube.com/watch?v=ZcYAarMN2mw