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History Of The Oscilloscope
Illustration of Joubert's step-by-step method of hand-plotting waveform measurements The history of the oscilloscope was fundamental to science because an oscilloscope is a device for viewing waveform oscillations, as of electrical voltage or current, in order to measure frequency and other wave characteristics. This was important in developing electromagnetic theory. The first recordings of waveforms were with a galvanometer coupled to a mechanical drawing system dating from the second decade of the 19th century. The modern day digital oscilloscope is a consequence of multiple generations of development of the oscillograph, cathode-ray tubes, analog oscilloscopes, and digital electronics. Hand-drawn oscillograms The earliest method of creating an image of a waveform was through a laborious and painstaking process of measuring the voltage or current of a spinning rotor at specific points around the axis of the rotor, and noting the measurements taken with a galvanometer. By ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oscillograph Joubert's Step-by-Step Method
An oscilloscope (formerly known as an oscillograph, informally scope or O-scope) is a type of electronic test instrument that graphically displays varying voltages of one or more signals as a function of time. Their main purpose is capturing information on electrical signals for debugging, analysis, or characterization. The displayed waveform can then be analyzed for properties such as amplitude, frequency, rise time, time interval, distortion, and others. Originally, calculation of these values required manually measuring the waveform against the scales built into the screen of the instrument. Modern digital instruments may calculate and display these properties directly. Oscilloscopes are used in the sciences, engineering, biomedical, automotive and the telecommunications industry. General-purpose instruments are used for maintenance of electronic equipment and laboratory work. Special-purpose oscilloscopes may be used to analyze an automotive ignition system or to display th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphor
A phosphor is a substance that exhibits the phenomenon of luminescence; it emits light when exposed to some type of radiant energy. The term is used both for fluorescent or phosphorescent substances which glow on exposure to ultraviolet or visible light, and cathodoluminescent substances which glow when struck by an electron beam ( cathode rays) in a cathode-ray tube. When a phosphor is exposed to radiation, the orbital electrons in its molecules are excited to a higher energy level; when they return to their former level they emit the energy as light of a certain color. Phosphors can be classified into two categories: fluorescent substances which emit the energy immediately and stop glowing when the exciting radiation is turned off, and phosphorescent substances which emit the energy after a delay, so they keep glowing after the radiation is turned off, decaying in brightness over a period of milliseconds to days. Fluorescent materials are used in applications in wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harry Garland
Harry T. Garland (born 1947) is a scientist, engineer, author, and entrepreneur who co-founded Cromemco Inc., one of the earliest and most successful microcomputer companies. He received the B.A. degree in mathematics from Kalamazoo College, and the Ph.D. degree in biophysics from Stanford University. Dr. Garland has been recognized as one of the most important innovators in the development of personal computers in Silicon Valley. Personal life He is the son of Harry G. Garland, the founder of Garland Manufacturing. Stanford University Garland began his graduate work at Stanford University in 1968. Garland's research at Stanford focused on the function of the human brain in controlling voluntary movement. He developed techniques in electromyography for monitoring muscle activity during voluntary movement and worked to delineate the role of the brain and the role of local reflexes in the control of muscles. This led to a deeper understanding of brain function during voluntary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphor
A phosphor is a substance that exhibits the phenomenon of luminescence; it emits light when exposed to some type of radiant energy. The term is used both for fluorescent or phosphorescent substances which glow on exposure to ultraviolet or visible light, and cathodoluminescent substances which glow when struck by an electron beam ( cathode rays) in a cathode-ray tube. When a phosphor is exposed to radiation, the orbital electrons in its molecules are excited to a higher energy level; when they return to their former level they emit the energy as light of a certain color. Phosphors can be classified into two categories: fluorescent substances which emit the energy immediately and stop glowing when the exciting radiation is turned off, and phosphorescent substances which emit the energy after a delay, so they keep glowing after the radiation is turned off, decaying in brightness over a period of milliseconds to days. Fluorescent materials are used in applications in wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melvin Jack Murdock
Melvin "Jack" Murdock (August 15, 1917 – May 16, 1971) was an American businessman, philanthropist, and radio technician from Portland, Oregon. He was a co-founder of Tektronix, Inc. Background Murdock was born in Portland, Oregon, on August 15, 1917. Upon graduating from Franklin High School, Murdock’s father offered him a choice of financing for college, or for a business. Murdock opened "Murdock Radio and Appliance Company" in 1935 in southeast Portland, where, in 1936, Howard Vollum began working as a radio technician in the back of the shop. Murdock served in the United States Coast Guard during World War II. Tektronix, Inc. In 1946– headquartered a mere six blocks from his earliest family home –Murdock formed Tektronix, Inc. as an equal partnership with Vollum, fellow former "coastie" Miles Tippery, and accountant Glenn McDowell. Tektronix, Inc. quickly became one of the world’s largest manufacturers of oscilloscopes, as well as other electronic devices. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Howard Vollum
Charles Howard Vollum (May 31, 1913 – February 5, 1986) was an American electronics engineer, businessman, and philanthropist in Oregon, United States. He was the co-founder of Tektronix Corporation, and endowed the Vollum Institute. Background Howard Vollum was born on May 31, 1913, in Portland, Oregon. He attended Portland's Catholic Columbia University (now University of Portland) from 1931 to 1933, then transferred to Reed College in 1934, where, in 1936, he received a Bachelor of Arts in Physics. His undergraduate thesis was the creation of a new kind of cathode-ray oscilloscope. Upon graduation from college, he spent several years servicing and installing radios and experimenting with electronic devices. From 1940 to 1941 he was Supervisor of the Radio Project, National Youth Administration, in Portland. Vollum served as an officer in the United States Army Signal Corps from 1942 to 1946, serving in England and New Jersey on artillery fire control radar. He wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triggered Sweep Controls On Tektronix 465 Oscilloscope
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Triggered may refer to: * ''Triggered'' (book), a 2019 non-fiction book by Donald Trump Jr. * ''Triggered'' (film), a 2020 South African action-horror film * " Triggered (Freestyle)", a song by American singer Jhené Aiko See also * Trigger (other) * Remotely triggered earthquakes Remotely triggered earthquakes are a result of the effects of large earthquakes at considerable distance, outside of the immediate aftershock zone. The farther one gets from the initiating earthquake in both space and time, the more difficult it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heathkit Oscilloscope OM-2
Heathkit is the brand name of kits and other electronic products produced and marketed by the Heath Company. The products over the decades have included electronic test equipment, high fidelity home audio equipment, television receivers, amateur radio equipment, robots, electronic ignition conversion modules for early model cars with point style ignitions, and the influential Heath H-8, H-89, and H-11 hobbyist computers, which were sold in kit form for assembly by the purchaser. Heathkit manufactured electronic kits from 1947 until 1992. After closing that business, the Heath Company continued with its products for education, and motion-sensor lighting controls. The lighting control business was sold around 2000. The company announced in 2011 that they were reentering the kit business after a 20-year hiatus but then filed for bankruptcy in 2012,Swindwa, Julie"Disassembly complete: Heathkit is no more" ''The Herald-Palladium'', 19 July 2012 and under new ownership began restr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain. The term ''RADAR'' was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging". The term ''radar'' has since entered English and other languages as an anacronym, a common noun, losing all capitalization. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwave domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raytheon
Raytheon is a business unit of RTX Corporation and is a major U.S. defense contractor and industrial corporation with manufacturing concentrations in weapons and military and commercial electronics. Founded in 1922, it merged in 2020 with United Technologies Corporation to form Raytheon Technologies, which changed its name to RTX Corporation in July 2023. Raytheon was established in 1922, reincorporated in 1928, and adopted the Raytheon Company name in 1959. More than 90% of Raytheon's revenues were obtained from military contracts and, as of 2012, it was the fifth-largest military contractor in the world. , it was the third-largest defense contractor in the United States by defense revenue. It was the world's largest producer of guided missiles, and was involved in corporate and special-mission aircraft until early 2007. In 2018, the company had around 67,000 employees worldwide and annual revenues of about US$25.35 billion. Over the years, Raytheon shifted its headquarters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Radio
General Radio Company (later, GenRad) was a broad-line manufacturer of electronic test equipment in Massachusetts, U.S. from 1915 to 2001. During the middle of 20th century, they were a major competitor to Hewlett-Packard and Tektronix. History On June 14, 1915, Melville Eastham and a small group of investors started General Radio Company in Cambridge, Massachusetts, a few blocks northwest of Massachusetts Institute of Technology. During the 1950s, the company moved to West Concord, Massachusetts, where it became a major player in the automatic test equipment (ATE) business, manufacturing a line of testers for assembled printed circuit boards. It also produced extensive lines of electrical component measuring equipment, sound and vibration measurement and RLC standards. In 1975, the company name was changed to GenRad. In 1991, a startup QuadTech was founded as spinoff of GenRad's Instrumentation division and Precision Product lines, as well as the rights to use the "GenR ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vladimir K
Vladimir (, , pre-1918 orthography: ) is a masculine given name of Slavic origin, widespread throughout all Slavic nations in different forms and spellings. The earliest record of a person with the name is Vladimir of Bulgaria (). Etymology The Old East Slavic form of the name is Володимѣръ ''Volodiměr'', while the Old Church Slavonic form is ''Vladiměr''. According to Max Vasmer, the name is composed of Slavic владь ''vladĭ'' "to rule" and ''*mēri'' "great", "famous" (related to Gothic element ''mērs'', ''-mir'', cf. Theode''mir'', Vala''mir''). The modern ( pre-1918) Russian forms Владимиръ and Владиміръ are based on the Church Slavonic one, with the replacement of мѣръ by миръ or міръ resulting from a folk etymological association with миръ "peace" or міръ "world". Max Vasmer, ''Etymological Dictionary of Russian Language'' s.v. "Владимир"starling.rinet.ru [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
