standard frequency and time signals
91Distress radiobeacon — PLB redirects here. For other uses, see PLB (disambiguation). Emergency position indicating radio beacons or EPIRBs Distress radio beacons, also known as emergency beacons, ELT or EPIRB, are tracking transmitters which aid in the detection and… …
92VHF omnidirectional range — This article is about the radio navigation aid. For other uses, see Vor. D VOR (Doppler VOR) ground station, co located with DME …
93Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… …
94Modem — For other uses, see Modem (disambiguation). A modem (modulator demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The… …
95SECAM — SECAM, also written SÉCAM (Séquentiel couleur à mémoire,[1] French for Sequential Color with Memory ), is an analog color television system first used in France. A team led by Henri de France working at Compagnie Française de Télévision (later… …
96Telecommunication — A parabolic satellite communication antenna at the biggest facility for satellite communication in Raisting, Bavaria, Germany …
97Radio clock — A radio clock is a clock that is synchronized by a time code bit stream transmitted by a radio transmitter connected to a time standard such as an atomic clock. Such a clock may be synchronized to the time sent by a single transmitter, such as… …
98Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… …
99RTLS communications — Articleissues essay=July 2008 copyedit=May 2008 refimprove=August 2008RTLS communications is a special breed of wireless communicating with the aim to support locating wireless nodes not only topologically, but merely topographically outdoors or… …
100navigation — navigational, adj. /nav i gay sheuhn/, n. 1. the act or process of navigating. 2. the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile. [1520 30; < L navigation (s. of navigatio) a voyage.… …
