Two-wire transmitter receiver, passive, BNC plug
Exit/exit, surge protection
Used as a plug-in transmitder or receiver
Video and data signal (up-to-date) transmission
Bandwidth: DC to 10MHz
Transmission via CAT5 (min) UTP cable
Up to 350m transmission (passive. Receivers/UTP Cable)
Up to 1500m transmission m. TR560 (active receiver)
No matching required
Disorder stress and noise cancellation
Built-in surge protection
Connections BNC connector/clamp bar

Size 1.3'' (H) x 2.0'' (W) x .95'' (D)
Power Requirements NONE REQUIRED
Input  1 vpp composite video Monochrome or Color
Output Balanced low voltage current loop
Shipping Weight  1 lb for single unit  System
(2 Transceivers Required)
Video Format RS170, NTSC, PAL, SECAM, CCIR
(Color or B/W)
Video Input 1 vpp composite video monochrome or color
Operating Frequency  DC to 10 MHz
Common Mode Rejection >60 dB typ.
Temperature Range -40 degrees C to +85 degrees C
Humidity Range 0 to 98%, non-condensing
Transient Immunity
400A V 1.2uS x 50 uS per ANSI / IEE 587 C62.41 B3
400A 8uS x 20 uS when ground screw terminal is
connected to earth-ground
Enclosure Material Black ABS flame retardant plastic
Twisted Pair Connection Screw terminals
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 VB39M is a passive UTP video balun for twisted pair transmission of CCTV video. The VB39M is a ''heavy duty'' design with two screw terminals for UTP connection and a female BNC for coax connection. The VB39M has built-in surge suppression for added equipment protection.
The VB39M video balun is a transceiver that provides a low cost means of sending live video over unshielded twisted pair, point-to-point wiring for distances of up to 750 feet (228 meters), with other CCTV balun transceivers, up to 1,500 feet (450 meters) with the TR515 single channel receiver and model 51 series hubs, up to 3,000 feet (900 meters) with the TR560 single channel receiver and 56 series hubs. The VB39M is compatible with all of the up-the-coax control systems.
A basic system uses (2) VB39 units, one at each end of a twisted pair of wires. These units are intended for use over existing in-house telephone wiring, Category 5 wiring or other twisted pair cable runs to provide a convenient, cost-effective alternative to coax.
The VB39M is designed to provide superior immunity from noise and interference even when running next to line power. The VB39M also provides a convenient mounting tab for ease of installation. The VB39M is a UTP transceiver that provides another Security Transmission Solution from Nitek.