Atomic clock (NIST-F1)

An atomic clock is a type of clock that uses an atomic resonance frequency standard as its timekeeping element. Atomic clocks are the most accurate timekeepers known, and are used as primary standards for international time distribution services, such as Coordinated Universal Time (UTC). The NIST-F1 atomic clock is a cesium atomic fountain clock located … Read more

Digital signal X

A digital signal is a signal that has been encoded into a digital format. This can be done using a variety of methods, such as Pulse Code Modulation (PCM) or Delta modulation. Once the signal has been digitalized, it can be transmitted using a variety of methods, such as twisted pair cables, optical fibers, or … Read more