BNC connector
BNC connector turns up in 2 fields: electronics, telecom & it. Here is what it means to the people in each one.
BNC connector in electronics
A quick-disconnect RF connector used for terminating coaxial cables.
A Bayonet Neill-Concelman connector designed to terminate coaxial cables while maintaining the cable's characteristic impedance, usually 50 or 75 ohms. The design keeps the center conductor isolated from the outer shield and locks securely with a quarter-turn bayonet mount, making it standard on oscilloscopes and signal generators.
"The BNC connector on this probe is loose, causing intermittent signal loss on channel one."
BNC connector in telecom & it
A quick-disconnect radio frequency fitting used for coaxial cable.
The BNC connector uses a bayonet-style locking mechanism requiring only a quarter-turn to secure. It is the standard interface for composite video, oscilloscope probes, and older Ethernet networks. The design maintains the characteristic impedance of the cable, typically 50 or 75 ohms, preventing signal reflection at the junction.
"Grab a 50-ohm BNC connector for that oscilloscope lead, the 75-ohm ones will cause reflection issues here."