Page 3
The VH851 and VH1651 UTP Video Receiver Hubs are
designed to receive standard UTP video and output
standard coax video.
Step 1)
Check the twisted pair for continuity. Do this by shorting
the pair of wires at one end and use an ohm meter to check the
resistance at the other end. Also, use a multimeter to test the
line to make sure there is no voltage on it. The chart below will
give you the length of your wires for a measured resistance.
Testing each line and recording the length for each camera run
can greatly reduce installation time.
For distances greater than 1,500 feet other long range
units may be needed.
Step 2)
Connect the twisted pair from each transmitter to the
screw terminals noting the polarity of the connection. If the
wires are reversed the video will be unviewable on the monitor.
Reversing the wires will not damage the unit.
Step 3)
The VH851 and VH1651 are powered from a 24VAC
wall pack. In the case of several units a larger central supply
may be used. Contact NITEK
®
Tech Support for recommenda-
tions. It is recommended that each video out BNC jack be
connected to a test monitor first for the purpose of adjusting the
receivers. After having adjusted each receiver, connect them
to the rest of your video system.
Installation
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