Nitek VH439 - Manual (Page 2)

Troubleshooting
Problem Video inverted or rolling and unstable.
Fix/Cause • Reverse the wires of the twisted pair at either the transmitter or receiver.
Problem
No video out at the receiver.
Fix/Cause • Check to make sure that there is video in at the transmit end.
• Make sure that the pair of wires you are using is not open or shorted between the
transmit and receive points.
• Check power to the receiver. The receiver must be powered with the supplied
wall pack
Problem
Ghost image at the receiver.
Fix/Cause • Bridge tap or “T” tap on the twisted pair video line. Remove tap.
For additional help with problems please call Nitek Tech Support at (800) 528-4343. Hours are from 8am to 5pm
Central Standard Time, Monday through Friday. We are always ready to help.
Installation
The VH439 is a 4 port video balloon hub with built-in surge protection. The system operates with other Nitek
UTP video equipment including other UTP video hubs, standard video balloon transceivers or active receiver units.
It is easy to mount in small places. The VH439 converts video into twisted pair signal or vice versa.
The diagram below shows only a few of the many possible configurations. If you have any questions about your
particular application call the Nitek sales or technical offices.
To hook up the VH439 connect a video coax to the BNC connector and hook the twisted pair to the matching +
and - terminals. There are 2 possible twisted pair connectors, the standard screw terminal and an RJ45 modular
jack. Both do the same thing and only one may be used. At the other end of the twisted pair connect another Nitek
UTP video unit in the same way. The twisted pair is polarity sensitive so if you are not getting proper video try
reversing the twisted pair. It will not hurt the equipment if the pair is reversed but the video will not be viewable.
VIDEO 1 VIDEO 2
VIDEO 3 VIDEO 4
T568B
12345678
+-+-+-+- 2 1 4
3
Monitor
VIDEO 1 VIDEO 2
VIDEO 3 VIDEO 4
T568B
12345678
+-+-+-+- 2 1 4
3
Monitor
Monitor
Monitor
Camera
Camera
Camera
Camera
1 Cat 5 Cable
(up to 1,000 ft)
(up to 750 ft with
DVR equipment)