BNC (bayonet Neill-Concelman) connector is a very common type of RF connector used for terminating coaxial cable
The use of BNC connectors are used for RF signal connections, for analog and Serial Digital Interface video signals, amateur radio antenna connections, aviation electronics (avionics) and various types of electronic test equipment.BNC connectors are an alternative to the RCA connector when used for composite video on commercial video devices, although many consumer electronics devices with RCA jacks can be used with BNC only commercial video equipment via a simple adapter. BNC connectors are commonly used on 10Base2 thin Ethernet networks, both on cable interconnections and network cards, although most have been replaced with a new, wired Ethernet device does not use coaxial cable. Some ARCnet network using BNC-terminated coax.
Specification
BNC connector on the 50 and 75 ohm versions. Initially all the 50 ohm cable and used with other impedances, the small mismatch is negligible at low frequencies. 75 ohm types can sometimes be recognized by reduced or absent dielectric in the marriage ended. Various versions are designed to mate with one another, [1] although the impedance mismatch in the cable can cause signal reflections. Typically, specified for use on the frequency of each to 4 and 2 GHz.BNC75 ohm connectors primarily used for video and DS3 Telco central office applications while 50 ohms and RF is used for data. Convention happening at the BBC on BNC connectors are used for video always 50 ohms may be due to a 50 ohm BNC connectors will damage the socket 75 ohms when connected in error. Many VHF receivers used 75 ohm antenna inputs so Often used 75 ohm BNC connectors. Many receivers use VHF 75 ohm antenna inputs so commonly used 75 ohm BNC connectors.
History
Connectors are named after the bayonet mount locking mechanism and two inventors, Paul Neill of Bell Labs (inventor of the N connector) and Amphenol engineer Carl Concelman (inventor of the connector C), and is much smaller than both N and C connectors. Other backronyms which has BNC picked up over the years include: "Child-Neill Concelman", "Baby N connector", "British Naval Connector", "bayonet Nut Connector", "bayonet Naval Connector". The basis for the development of the BNC connector is the work of Octavio M. Salati, a graduate of the Moore School of Electrical Engineering from the University of Pennsylvania (BSEE'36, PhD'63). He filed a patent in 1945 (awarded 1951) when working at Hazeltine Electronics Corporation to be placed on the coaxial cable connector that will minimize wave reflection / loss.
Similar connectors
Thread J version of the BNC connector, known as the TNC connector (for Threaded Neill-Concelman) are also available. Have superior performance with a BNC connector on the wave frequency.
Triaxial BNC Connector
BNC connectors are commonly used in NIM electronics, but now often replaced with 00 miniature Lemo connector that allows for high densities. For high voltages, MHV and SHV connectors are typically used. MHV connectors are easily mistaken for BNC connectors and can be made to the male by forcing them harshly. SHV connectors are developed as a safer alternative to MHV connector and will not intermate usual with BNC connectors.In the USSR, has been copied as a BNC connector plug SR-50 (Russian: СР-50) and SR-75 (Russian: СР-75). This connector is slightly different dimensions (as a result of recalculating the Imperial Metric system), but generally are able to BNC, sometimes with the force applied.Twin BNC (also known as twinax) uses the same connector bayonet latching BNC connector shell as usual, but contains two independent contact points (one male and one female), which allows the connection of 78 ohm or 95 ohm shielded differential pair such as RG-108A . [3] They are capable of operating at 100 MHz and 100 volts. Twin BNC connectors will not intermate usual with BNC connectors.Triaxial (also known as TRIAX) is a BNC connector on the variant that carries both signal and maintain and ground conductors. It's used in sensitive electronic measuring system, especially from Keithley manufacturing. [Citation needed] The initial designed with extra care just a conductor, but it will be a tri-axial connector also includes three towage arrangements to get rid of an accident forced marriage with a BNC connector. Adaptors that there are a number of possible interconnection between the tri-ax and BNC connectors.
Usefulness
BNC connectors are used for signal connections such as:• analog and serial digital video signal interface• amateur radio antenna• aviation electronics (avionics)• test equipment.
(Wikipedia.org with some changes)
