BNC Connectors – What do they do?
The BNC connector is similar in function to a RCA connector, however the BNC typically has a more secure connection. The BNC is more secure because it has snap-lock technology, which allows you to firmly lock it into place; this eliminates the possibility of disconnection if the cable is accidentally pulled on and assures a clearer signal to your television.
The BNC connector was first developed when the need arose for a high quality, sturdy connector that had multi-use capabilities. Although BNCs are most commonly used in households as television cable connections, they can also be used for a wide range of other equipment including audio generators, avionics and power meters.
There are a few different BNC connector types:
- Compression gland – requires no specialized tools to assemble
- Crimp – requires greater accuracy when choosing the correct connector, because not all crimp types are practical for all cable sizes
- Twist-on connector – only requires a cable stripper to assemble.
- Require a separate power source – power cords were originally included but they were too bulky and made the BNC not as universal
- Can transmit videos but don’t support any audio – sometimes results in the need for an additional audio connector
- Applied to frequencies below 3GHz and voltages below 500v
- Come in 50 and75 ohm versions