  the bnc (bayonet neillâconcelman) 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&nbsp;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== thumb|right|rear of a video switcher with an array of bnc connectors the bnc was originally designed for military use and has gained wide acceptance in video and rf applications to 2&nbsp;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&nbsp;ghz, the slots may radiate signals, so the connector is usable, but not necessarily stable up to about 11&nbsp;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. [[file:bnc-technik.jpg|thumb|right
Analog_video_connectors Audiovisual_connectors Coaxial_connectors Television_terminology