Posts Tagged ‘ BNC ’

BNC Connections

Friday, July 8th, 2011

Probably the most common cable joiners in the digital video security systems industry are BNC connections.  BNC connectors are easy to use and ensure a sound, full contact connection.  BNC connections are different than most other single pair wire connectors  (such as RCA plugs, for example) plugs, becuase BNC connections are “locked” in place.  The following article is about the origin and use (including applications) of BNC Connections.

BNC is an acronym for this type of radio frequency connector.  The connector is designed for use with coaxial cable and is generally used for radio, television–including digital video camera security systems, and other radio-frequency applications.

BNC stands for Bayonet Neill-Concelman.  Bayonet (“B”) represents the the type of twist locking system that holds the connectors together.  Unlike RCA plugs that just push together can be subjected to accidental disconnection, BNC connections are locked together in the same twisting lock configuration as that of a gun bayonet.   Generally, BNCs do not become disconnected unless they are purposely untwisted from the locked connection.

The “N” and “C” in BNC stands for the first letters of the last names of the two men that invented the connector; Paul Neill and Carl Concelman.  However, origin for development lies with Octavio M. Salati, a graduate of the Moore School of Electrical Engineering (of the University of Pennsylvania).  In 1945 Salati filed for a patent for a coaxial cable connector that would minimize wave reflection and/or loss (one of the primary attributes of a BNC type connector).

Another feature of the BNC connection is that the connectors are available to match the impedance of the cable they are connecting.  Generally, there are two major types of BNC connections based on impedance, 50 and 75 ohm versions that are used today.

There are also many variations that originated from the BNC design.  These include the SR-50 and SR-75 Russian copies whose dimensions differ slightly from the BNC because of converting the measurements from English (Imperial) units to metric.  There is also a Threaded Niell Concelman or TNC connector that displays superior performance over a BNC for microwave applications.

The BNC connection consists of two separate pieces, the “female” and “male” ends.   These ends are firmly and permanently attached to the shielded coaxial cable.  The male end consists of a center (usually) solid copper core wire with the metal shield or mesh that surrounds the cable completing the single pair wire connection.  The male connector is pushed into the female connector and twisted, making the single pair connection and locking the connection at the same time.

There are also different types of BNC connections based on how the actual connector is attached to the cable or provides adaptation to a BNC connector.  Security Camera King offers a variety of BNC connectors on their on-line store catalog.  They may be found at or by clicking “Security Camera Accessories” the “Surveillance Camera Connectors” on the left hand side of the home page.

Security Camera King offers three different types of BNC connections base on how the connector attached to the cable it is attached to and not the actual connection between BNC pieces themselves.  In addition, more many connectors they offer a single unit price and a 100 unit price.

The first of three is the crimp-on connector.  This connector requires the use of a crimping tool to secure the banded necks of the BNC to the coaxial cable.  They are referred to in our catalog as “2 Piece Crimp-on BNC Connector).  These are fairly easy to work with, and when installed properly, including being crimped properly, these provide a fair to good connection.  This BNC requires the use of a special crimping tool.

The second is the twist-on connector.  They are referred to in the catalog as “BNC Connector Twist-On.”  This BNC connection is easy to install (just twist or screw on the cable ends) and requires no special tools.  These connectors hold fairly well and provide a fair to good connection.  Screwing the connectors onto the cable ends can actually be a little difficult though.

The third type is a compression connector.  They are referred in the catalog as BNC Compression Type Connector.”  These connectors require a compression crimping tool (also sold by Security Camera King) and provide an excellent connection and are easy to work with.

In addition to BNC connections, there are many other adaptor and connector types available for purchase on the Web page listed above.


8 Camera Outdoor DVR System and DVD Burner

Wednesday, October 20th, 2010

Nothing provides perimeter coverage in business or residential applications better than an 8 camera outdoor DVR system with DVD burner. In fact, these systems are great for use in just about any outdoor application and with a DVD burner, you can save copies of your video files for archiving or to give to police or insurance companies.

Security Camera King offers a full line of security camera equipment, including four different 8 camera outdoor DVR systems packages. We recognize the fact that everyone’s situation is different, possibly requiring a different camera at each point or some other additional feature. Therefore, we have put together these systems on our web site in such a way as to allow you to make different selections even for the system packages. Some changes can be made at no additional cost, while others may be made at a nominal cost compared to individually buying each component.

Each of these packages includes a DVR (Digital Video Recorder) with an on-board DVD writer and a USB thumb drive. The DVRs utilize H.264, the latest CODEC (COmpression/DECompression) utility, used to reduce the size of digital video files so that longer video recording times can be realized without sacrificing image quality. In addition, our DVRs feature a Linux Operating System (OS), a built in Web server, and two-way audio available over the Internet. This allows the system to be monitored over the Internet, Smartphones, or even have email alerts programmed to automatically notify you on different events (triggers).

Not only can these 8 camera outdoor DVR systems with DVD burner packages be monitored over the Internet, but nearly every function of the DVR can be controlled over the internet as well. This even includes multiple user functionality via the Internet. Or if you choose to use a local monitor, these units support HDMI, VGA, and BNC video outputs, and use of several monitors simultaneously.

Our line of DVRs featured in our 8 camera outdoor DVR systems with DVD burner packages can be operated easily with a standard USB mouse. In addition, the DVRs feature easy operation and control of Pan-Tilt-Zoom (PTZ) cameras whether you use the supplied GUI software or operate your system via Internet Explorer over the internet.

To complete the functionality of our 8 camera outdoor DVR system with DVD burner packages, the DVR also has an on-board DVD-RW (DVD-RWs can record and erase and record again if desired on one DVD-RW disk.) Using the DV-RW, you can copy any of your recorded video (and/or audio) from your DVR’s hard drive to a DVD. The digital video file that you copy to the DVD can be displayed on just about any personal computer and many of today’s DVD players. Contact one of our security experts today for more information or to make a purchase.

Last, but certainly not least, each one of the 8 camera outdoor DVR system with DVD burner packages offered by Security Camera King comes with a full 3 year warranty on the DVR and a full 1 year warranty of the cameras and accessories.

In addition, these systems are easy to install and operate. However, if should you have any difficulty at all with installation or operation, our trained professional technical support staff will provide as much remote assistance as possible including any training that you need to use your new security system.

Security Camera King offers four different complete 8 channel DVR security camera packages two of which are built around the Elite DVR and two built around the Ultimate DVR. The complete 8 channel Elite DVR security camera package includes the following:
• An 8 channel Elite series DVR with a 250 MB hard drive and H.264 CODEC;
• 8 Outdoor (may also be used as indoor) weatherproof high resolution infrared vandal-proof dome security cameras;
• Two 4-channel plug-in transformer power supplies; and,
• 8 plug and play cables.

Our complete 8 channel Elite DVR security camera package with bulk cable and BNCs offers the same cameras and DVR, but includes an 8 channel professional power distribution box instead of plug-in transformers, and 2 boxes of bulk RG-59-18/2 Siamese video transmission cable.

We offer two complete 8 channel Ultimate security camera packages that feature the Ultimate series DVR. The Ultimate series DVR is capable of recording 704 x 480 resolution at 30 FPS on all 8 channels simultaneously. There are two Ultimate series packages as with the Elite series, that differ depending on power supply preference and bulk wire.