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1.Why use video baluns? 

Normally, coaxial cable is used to carry video between the camera and the monitor. Substituting networking cable (Cat5 or Cat6) will allow for longer runs at a lower cost. Such video can be carried over long distances, as much as 6,000 ft. Each Cat5 cable contains 8 wires. Because video is sent in pairs, one Cat5 cable can support up to 4 cameras. If fewer cameras are needed, Cat5 wires can be used to carry power, so that cameras can be powered from far away.

Phone cable can be used instead of Cat5. Phone cables are like Cat5 cables but only have six wires (three pairs of two). A normal phone number and connection uses only one pair (two wires), leaving four more wires free. These four wires can be used to carry video. Phone cables have a tremendous advantage – wiring cost efficiency. Because phone cables are already integrated into a building's walls, all you have to do is unscrew the face plate, strip the phone cable wires, and connect it to the balun.

2.Wire to Video Balun Connection

After stripping the wires, simply insert each wire into the corresponding wire slots in the video balun. A wiring guide is included with each of our baluns.

3.Video Balun Connectors: RJ-45, Terminal Block, and Screw Down Wiring

*The RJ45 port is a standard connector used by Cat5 cables.

*Terminal blocks, on the other hand, require wire stripping and individual wire insertion into the block wire openings. The advantage is flexibility in wiring, allowing more or fewer wires to be used for power. Terminal blocks use a spring and are easy to use.

*Screw down wiring gives the advantages of terminal block wiring, but requires more effort.

4.Power Transferring Video Baluns

Monitor-side baluns or bridges that support power will input 18V-24V DC from the wall. As the power travels towards the camera, naturally, this 18V current will degrade. On the camera-side balun, a power regulator will convert the higher current to 12V DC and feed it to the camera. Some baluns can pass AC power to the camera.

5.Active and Passive Video Baluns

Composite video signal normally carries a 1V peak to peak signal. Passive baluns do not alter the intensity of the signal, and merely transfers it from coaxial to Cat5 connectivity or vice versa. However, for long range applications, the signal will naturally degrade. Therefore, active baluns are useful for intensifying the signal and transmitting a stronger signal to the receiving balun. An active balun on the receiving side will receive a weakened signal and intensify it before sending it to the video surveillance appliance. The longest range active balun will boost the signal up to 5V. Active baluns come in long, medium, short, and adjustable ranges. A quality DVR machine can tolerate video signals ranging from 0.3V to 5.0V 

Active and passive baluns can exist in three configurations:

Camera Side Monitor Side Description
Passive Passive No signal intensity change or amplification. 1,000 ft maximum distance.
Passive Active Receiving balun amplifies weakened signal and sends new stronger signal to surveillance device. 4,000 ft maximum distance.
Active Active Sending balun sends strengthened signal to receiving balun, which again strengthens the signal and sends to surveillance device. 6,000 ft maximum distance.



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