A time scale made up of equal intervals.

A transmission line that has distributed electrical properties, i.e., resistance, inductance, and capacitance per unit length, that are constant along the line, and in which the voltage-to-current ratio does not vary with distance along the line, if the line is terminated in its characteristic impedance.
Note 1: Examples of uniform transmission lines are coaxial cables, twisted pairs, and single wires… (Read More →)

See white noise.

Synonym unilateral synchronization system.

A system of synchronization in which signals from a single location are used to synchronize clocks at one or more other locations. Synonym unilateral control system.

Synonym single-mode optical fiber.

Crosstalk that consists of unintelligible signals, hence from which information cannot be derived.

See interference.

A device that is inserted between a primary power source, such as a commercial utility, and the primary power input of equipment to be protected, e.g., a computer system, for the purpose of eliminating the effects of transient anomalies or temporary outages.
Note 1: An UPS consists of an inverter, usually electronic, that is powered by a battery that is… (Read More →)

A two-state signal where one of the states is represented by voltage or current and the other state is represented by no voltage or current.
Note: The current flow can be in either direction.