Of an oscillator, the change in frequency, over time, caused by internal changes in oscillator parameters even when external factors, such as environment and power supply characteristics, are constant.

See allocation (of a frequency band).

See allotment (of a radio frequency or radio frequency channel).

1. Authorization, given by an Administration, for a radio station to use a radio frequency or radio frequency channel under specified conditions
2. The process of authorizing a specific frequency, group of frequencies, or frequency band to be used at a certain location under specified conditions, such as bandwidth, power, azimuth, duty cycle, or modulation. Synonym radio frequency channel assignment.

The power granted an Administration, or its designated or delegated leader or agency via treaty or law, to specify frequencies, or frequency bands, in the electromagnetic spectrum for use in systems or equipment.
Note: Primary frequency assignment authority for the United States is exercised by the National Telecommunications and Information Administration (NTIA) for the Federal Government and by the Federal… (Read More →)

1. The process by which the relative phases of precision clocks are compared for the purpose of defining a single time standard.
2. A process in which network synchronization is achieved by use, at all nodes, of oscillators that adjust their frequencies to the average frequency of the digital bit streams received from connected nodes.
Note: In frequency averaging, all… (Read More →)

See electromagnetic spectrum.

See allocation (of a frequency band).

See phase coherence.

1. Of an electronic device, the extent to which it will operate at its designed performance level in its intended operational environment (including the presence of interference) without causing interference to other devices.
2. The degree to which an electrical or electronic device or devices operating on or responding to a specified frequency or frequencies is capable of functioning with… (Read More →)