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|width = |height = |electrical = |earth = |maximum_voltage = |maximum_current = |cable = Coaxial |passband = Typically 0–4 GHz |physical_connector = }} The BNC (British Naval Connector) connector is a miniature quick connect/disconnect radio frequency connector used for coaxial cable. It features two bayonet lugs on the female connector; mating is fully achieved with a quarter turn of the coupling nut. BNC connectors are used with miniature-to-subminiature coaxial cable in radio, television, and other radio-frequency electronic equipment, test instruments, and video signals. The BNC was commonly used with 10BASE2 computer networks. BNC connectors are made to match the characteristic impedance of cable at either 50 ohms or 75 ohms. They are usually applied for frequencies below 4 GHz〔 and voltages below 500 volts.〔(BNC Connector specifications ), Amphenol Connex〕 Similar connectors using the bayonet connection principle exist, and a threaded connector is also available. United States military standard MIL-PRF-39012 entitled ''Connectors, Coaxial, Radio Frequency, General Specification for'' (formerly MIL-C-39012) covers the general requirements and tests for radio frequency connectors used with flexible cables and certain other types of coaxial transmission lines in military, aerospace, and spaceflight applications.〔(MIL-PRF-39012 )〕 ==Use== The BNC was originally designed by the British Navy for military use and has gained wide acceptance in video and RF applications to 2 GHz. The BNC uses a slotted outer conductor and some plastic dielectric on each gender connector. This dielectric causes increasing losses at higher frequencies. Above 4 GHz, the slots may radiate signals, so the connector is usable, but not necessarily stable up to about 11 GHz. Both 50 ohm and 75 ohm versions are available. The BNC connector is used for signal connections such as: *analog and serial digital interface video signals *amateur radio antennas *aerospace electronics (avionics) *test equipment. The BNC connector is used for composite video on commercial video devices. Consumer electronics devices with RCA connector jacks can be used with BNC-only commercial video equipment by inserting an adapter. BNC connectors were commonly used on 10base2 thin Ethernet network cables and network cards. BNC connections can also be found in recording studios. Digital recording equipment uses the connection for synchronization of various components via the transmission of word clock timing signals. Typically the male connector is fitted to a cable, and the female to a panel on equipment. Cable connectors are often designed to be fitted by crimping〔(Typical crimp BNC connector )〕 using a special power or manual tool.〔(Typical manual crimp tool for fitting BNC and other coaxial connectors to cables )〕 Wire strippers which strip outer jacket, shield braid, and inner dielectric to the correct lengths in one operation are used.〔(Typical coax one-operation stripper )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BNC connector」の詳細全文を読む スポンサード リンク
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