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-- About BNC Cables --
BNC Cables are a type of coaxial cable that use the BNC (Bayonet Neill-Concelman) connector which is a common type of RF connector. BNC cables are usually used with:
Amateur radio antennas
Avaiation electionics
The BNC Connector 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 were commonly used on 10BASE2 thin Ethernet networks, both on cable interconnections 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.
What does a BNC Connector look like?
BNC Connecotrs are usually applied to frequrencies below 3GHz and voltages below 500 Volts.
BNC connectors exist in 50 and 75 ohm versions, matched for use with cables of the same characteristic impedance. The 75 ohm types can sometimes be recognized by the reduced or absent dielectric in the mating ends. The 50 and 75 ohm connectors are typically specified for use at frequencies up to 4 and 2 GHz respectively.
At frequencies below 10 MHz the impedance mismatch between a 50 ohm connector or cable and a 75 ohm one has negligible effects. BNC connectors were thus originally made only in 50 ohm versions, for use with any impedance of cable. Above this frequency, however, the mismatch becomes progressively more significant and can lead to signal reflections.
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Wikipedia was used as a source for this information. Thank you to all those who contributed to it.