What is BNC connector
The BNC connector (initialism of "Bayonet Neill–Concelman") is a miniature quick connect/disconnect radio frequency connector used for coaxial cable.
BNC connectors have two bayonet lugs on the female connector; simply turn the connector nut a quarter turn to mate. It uses a slotted outer conductor and some plastic dielectric on each gender connector. This dielectric leads to increased losses at higher frequencies. Above 4 GHz, the socket may radiate signals, so the connector is usable, but not necessarily stable to around 11 GHz. The BNC connector matches the cable characteristic impedance of 50 ohms or 75 ohms (other impedances, such as ARCNET's 93 ohms, are less common though). They are typically used for frequencies below 4 GHz[1] and voltages below 500 volts. Interface specifications for BNC and many other connectors are referenced in MIL-STD-348.
The BNC was originally designed for military use and has gained wide acceptance in video and RF applications to 2 GHz. BNC connectors are used with miniature-to-subminiature coaxial cable in radio, television, and other radio-frequency electronic equipment. They were commonly used for early computer networks, including ARCnet, the IBM PC Network, and the 10BASE2 variant of Ethernet.
The BNC connector is used for signal connections such as:
l analog and serial digital interface video signals
l radio antennas
l aerospace electronics (avionics)
l nuclear instrumentation
l test equipment.
BNC connectors are used for composite video on commercial video equipment. By plugging in an adapter, consumer electronic equipment with RCA connector jacks can be used with BNC-only commercial video equipment. BNC connectors are commonly used for 10base2 thin ethernet network cables and network cards. BNC connections can also be found in the studio. Digital recording equipment uses connections to synchronize various components through the transmission of a word clock timing signal.
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[4] using a special power or manual tool.[5][failed verification] Wire strippers which strip outer jacket, shield braid, and inner dielectric to the correct lengths in one operation are used.
Key advantages of BNC connectors include:
Simple design. They have the simplest design of all coax cable connectors.
Easy connection. They do not require any tools.
Small accidental disconnection risk. They lock the connection in place to prevent accidental disconnection caused by vibrations or other movements.
Some of the disadvantages include:
Limited frequency range. They have a frequency range limited to DC-4 GHz.
High susceptibility to variations. They can experience variations in resistance and outer sleeve connection when exposed to mechanical vibrations.
Typical applications include commercial audio/video transmission systems and RF test equipment (e.g., frequency generators, network analyzers, and oscilloscopes).
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