📹🔄 BNC • RJ45 Balun Kit

A BNC • RJ45 balun kit allows analog video signals—typically from CCTV cameras—to be transmitted over standard Cat5e or Cat6 Ethernet cables using RJ45 connectors. These passive baluns require no power and are ideal for cost-effective, long-distance video transmission in surveillance systems.
 
🔧 Kit Components
Transmitter Balun:
BNC Male → RJ45 Female
Connects to CCTV camera’s BNC output
Receiver Balun:
RJ45 Female → BNC Male
Connects to DVR or monitor’s BNC input
Cable Type:
UTP (Unshielded Twisted Pair), typically Cat5e or Cat6
RJ45 terminated or raw wire block depending on model
 
🖥️ Compatible Devices
📷 Analog CCTV cameras (CVBS, AHD, HD-TVI, HD-CVI)
📼 DVRs and video monitors with BNC inputs
🧱 Structured cabling systems using Cat5e/Cat6
🧪 Signal analyzers and test rigs
🧰 Multiplexers, quads, and video switchers
 
✅ Common Uses
🔄 Transmit analog video over Ethernet cable infrastructure
🧩 Retrofit coaxial systems using existing Cat5e/Cat6 runs
🛠️ Simplify multi-camera installs with centralized cabling
🧪 Test long-distance video signal integrity
🧼 Reduce cost and clutter in surveillance deployments
 
🧠 Signal Format Notes
Signal Type: Analog video (composite or HD analog)
Impedance Matching: 75Ω (BNC) ↔ 100Ω (RJ45/UTP) via balun transformer
Distance Support:
Passive: Up to ~1200 ft for standard analog
HD formats: ~400–650 ft depending on resolution
Bandwidth: Supports up to 8MP analog video depending on quality
❗ No IP video support—baluns are for analog signals only
 
⚠️ Things to Watch Out For
🔌 Not compatible with IP cameras or NVRs—analog only
📏 Cable quality affects distance—use solid copper Cat5e/Cat6
🧯 Outdoor installs require weatherproof enclosures
🔄 Match balun type to camera format (CVBS, AHD, TVI, CVI)
🧪 Ground loop interference may occur—use isolated baluns if needed
 
🛠️ Quick Tips for Beginners
🔍 Identify camera output—must be BNC analog, not IP
🧭 Use one balun at each end of the UTP cable run
🧰 Keep RJ45 pinout consistent—typically uses pins 1/2 for video
🧪 Test signal before final install using portable monitor
🧼 Label baluns and cable ends for easy troubleshooting