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 an inherent long-term instability. This instability relegates the rubidium standard to its status as a secondary standard.
RUBIDIUM STANDARD
Meaning of RUBIDIUM STANDARD in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012