reference transmitter
81Atomic clock — Nuclear clock redirects here. For the clock as a measure for risk of catastrophic destruction, see Doomsday Clock. For a clock updated by radio signals (commonly but inaccurately called an atomic clock ), see Radio clock. For the album by Zion I …
82Coachella Valley — For the city, see Coachella, California. For the high school, see Coachella Valley High School. Coachella Valley Coachella Valley (   …
83Patient registration — is the concept and set of methods needed to corelate the reference position of a virtual 3D dataset gathered by computer medical imaging with the reference position of the patient. This procedure is crucial in computer assisted surgery, in order… …
84Hadith — ( ar. الحديث ArTranslit|al ḥadīth, pl. aḥadīth ; lit . narrative ) are oral traditions relating to the words and deeds of the Islamic prophet Muhammad. Hadith collections are regarded as important tools for determining the Sunnah, or Muslim way… …
85Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
86Wavelength-division multiplexing — For the radio station, see DWDM FM. Multiplex techniques Circuit mode (constant bandwidth) TDM · FDM · SDM Polarization multiplexing Spatial m …
87Composite video — Not to be confused with Component video. Composite video On consumer products a yellow RCA connector is typically used for composite video. Type Analog video connector …
88Chesham — For other uses, see Chesham (disambiguation). Coordinates: 51°42′11″N 0°36′07″W / 51.703°N 0.602°W / 51.703; 0.602 …
89Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …
90Variable-frequency oscillator — A variable frequency oscillator (VFO) in electronics is a oscillator with an oscillation frequency that can be electronically changed (hence, variable).cite book |title=The ARRL Handbook for Radio Amateurs, Sixty Eighth Edition |editor=Larry D.… …
