BNC Connector

You may or may not be familiar with what a BNC connector is. With so many connectors and adapters, cables and cords, it becomes a little overwhelming trying to determine what each part does and goes to. A BNC connector is the abbreviated term for a Bayonet Nut Coupling. You may have heard of a BNC connector referred to this at some point. The BNC connector has a special type of socket and plug that allows for a snug connection. It is used for networking, video and most commonly audio connections. The BNC connector is used for most radio frequency connections, which was its original purpose. Today, the BNC connector connects all sorts of co-axial cable cords which are used everyday. BNC connectors work to process analog and serial digital interface video broadcast along with the audio transmissions.

The way the BNC connector works is unique. The plug is designed to fit only a certain way. When the plug is inserted it needs to be turned in order to allow the pins in the hole to lock correctly with the furrow. Once it is locked you know you have the correct connection. This is the only way to get the BNC connector to work properly. When trying to determine which BNC connector to use you will want to determine what type of frequency you will be transmitting. There are 50 ohm and 75 ohm impedance and depending on how many GHz you have will determine which type you should use. The 75 ohm is good for using on 4 GHz or less and the 50 ohm is usually used for up to 2 GHz.

You may be surprised as to the many different uses for a BNC connector, especially if you are not familiar with them. They are used regularly in aviation electronic devices, amateur radio connections, electronic test devices, RF signal connections, serial digital and analog interface, and video signals.

There are several other connectors that may be confused with the BNC connector. The TNC connector is similar to the BNC connector however it is the threaded version. It has a 50 ohm impedance and can usually operate when used with frequency spectrums that range anywhere from 0-11 GHz. This type of connector is better suited for microwave frequencies and should be used instead of a BNC connector when needed. A LEMO 00 miniature connector has taken the place of the BNC connector in many applications. When it comes to the NIM electronics the LEMO 00 is better suited because it provides for higher densities. Also connectors known as the MHV and SHV are commonly used for applications with higher voltages.

A twin BNC connector uses the same type of connecting structure as the common BNC connector however the twin connector contains both female and male contact points. This allows for a 78 ohm and a 95 ohm connection. DNC connectors are unable to connect with the twin BNC connectors which should be considered before purchasing. One other connector that is related to the BNC connector is the Triaxial connector. They are a different form of BNC connectors that feature both a signal and guard. They also contain a ground conductor and incorporate a three lug arrangement which helps protect against accidental mating with BNC connectors. The triaxial connector is used mostly with systems that have sensitive electronic measurements.

BNC connectors definitely serve many purposes and they also have a variety of different forms. Luckily BNC connectors do not cost much at all. If you are in need of a BNC connector then you should be able to find one either online or at your local electronics store.

This BNC Connector Review is Written/Updated on Jun 7th, 2010 and filed under Consumer Electronics. Both comments and pings are currently closed.

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