Filed under: Cables, CCTV Articles, CCTV Camera, General Technology, Security Camera, Security Camera System
A balun is defined as a type of transformer that can convert electrical signals that are balanced about ground (differential ) to signals that are unbalanced (single-ended), and the reverse. They are also often used to connect lines of differing impedance (the effective resistance of an electrical circuit). The origin of the word comes from “balance.” But what does all this mean to the CCTV world? Following are 3 main benefits to using video balun technology in a CCTV setup:
- Longer cable runs – When you’re running cable, most of us in the industry know that after 500 feet, you start to run into issues with Siamese cable (RG59). video baluns allow you to extend your cable runs up to 1000 feet, and are normally called passive video baluns. You can extend you security cameras even further with active video baluns that allows distances up to 6000 feet.
- Use of Cat5e – Most video baluns provide a solid solution to extending your cable runs by using Cat5e/ Cat6 cable. By using this type of cable, you’ll be able to further upgrade your security system in the future with IP cameras, pending you have a hybrid DVR (supports both analog and IP cameras). Also, the video signal is stronger when using Cat5e, and since the wire contains 4 pairs, you can use one for video transmission, and the extra pairs can be used for power or even PTZ control function for cameras using RS422 or RS485 protocol.
- Easier installation and more cost-effective - Using video baluns with Cat5e wire also makes installations easier by not having to use bulky coaxial cable (and at the same time saves you a little green as well). Installs are also made more manageable because you can run power to one central location, rather than having it in several different locations. Cat5e is also about 10-20% cheaper than coax wire, with installs sometimes being over 50% more cost-effective as well.