The primary purpose of a video balun is to convert the analog video signal (from a CCTV camera) into a format that can be transmitted over twisted pair cables (like Ethernet cables). This allows the use of more affordable and flexible wiring compared to traditional coaxial cables.
The 8 MP designation refers to the resolution the system can support, meaning the balun is capable of handling 8 megapixel (8 MP) video signals, which corresponds to 4K resolution (3840 x 2160 pixels).
It ensures that high-definition video signals, typically coming from modern IP cameras or HD analog cameras, can be transmitted effectively without signal degradation.
The balun converts the balanced signal (used in twisted pair cabling) to an unbalanced signal (used in traditional coaxial cables), or vice versa, depending on the direction of signal transmission.
Balanced signals are more resistant to noise and interference, making them ideal for long-distance transmission.
Application in CCTV Systems
 Baluns are commonly used in analog CCTV systems, but they are also compatible with some HD over coax systems like AHD (Analog High Definition), TVI (Transport Video Interface), or CVI (Composite Video Interface), which allow higher-resolution video to be transmitted over coaxial cables.