Baluns contain small signal transformers that are specially tuned to match the
cables impedance and convert the unbalanced signal to a balanced one. PASSIVE
baluns just have the transformers and very little else in them.
On some PASSIVE baluns that carry video and data signals, the data
terminals do not go through a transformer or any other electronics and
are a direct electrical connection to the CAT5 cable. These terminals
can be useful for lots of purposes including sending low voltage
(5 or 12V) from one balun to another.
Baluns are a popular solution as they allow the engineer to use existing
spare CAT5 cable runs within a building for the CCTV installation. They are
a great way of adding extra HD TVI, CVI or AHD cameras to a remote part of
Send & receive 16 video signals 200m down 4 CAT5 cables. The
BAL916 Passive 16 channel balun works in the same way as the 8ch
model above but combines 16 Baluns into 1 box and allows easy RJ45
connection of 4 CAT5 cables at the same time. The BAL916 can be
used as a standalone unit or mounted on a 19" rack using the
This CAT5e-CCTV cable has been jointly developed by ourselves and a major
cable manufacturer to provide superb results in video signal transmission.
Featuring quality copper cores, it can often outperform standard computer
CAT5e producing a better picture quality over longer distances.