Size 1 RU x 6.0''D
Power Requirements NONE REQUIRED
Video Input Connection  Standard BNC connector for
1 Vpp composite video monochrome or color
Video Format RS170, NTSC, PAL, SECAM,
CCIR (Color or B/W)
Twisted Pair Connection Screw terminals providing balanced low voltage current loop
Common Mode Rejection >70dB
Operating Frequency DC to 10 MHz
Recommended Transmission Distance w/passive units - Up to 1,000 feet (300 meters) w/active units - Up to 3,000 feet (900 meters)
Transient Immunity Built-in
Wire Spec  26 to 12 AWG Unshielded Twisted Pair (UTP) 
DC Loop Resistance  51 Ohms/1,000 feet (max) (51 Ohms/300 meters) 
Normal Capacitance  17pF/ft.
Impedance 100 Ohms +/- 20% 
UTP Category  2 or better
The VH839 is an eight port video balun hubs with built-in surge suppression. Systems operate with other Nitek UTP video equipment including, video balun hubs, standard video balun transceivers or active receivers.
The VH839 video balun hubs are multi-channel video transmission devices that provide a low cost means of sending quality live video over Category UTP cabling. The systems can also adapt to existing communication and computer network spare pairs, or new cable installations. The VH839 can send video up to 750 feet (225 meters) when used with other products in the VB37 or VB39 family. When used with model TR515 or TR560 active receivers, distances of 1,500 feet (450 meters) and 3,000 feet, (900 meters), respectively, can be attained. The VH839 is designed to provide superior immunity from noise and interference, such as RFI and EMI.