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CCTV

Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point wireless links.

CCTV is often used for surveillance in areas that may need monitoring such as banks, casinos, airports, military installations and convenience stores. People can also buy consumer CCTV Systems for personal, private or commercial use. A more advanced form of CCTV, utilising Digital Video Recorders (DVR), provides recording for possibly many years, with a variety of quality and performance options and extra features.

DVR

The digital video recorder is the modern replacement to “time lapse” VCR’s used during
the 80’s and early 90’s. Using a hard disk, the DVR stores recordings from the
connected cameras. Recording quality can be adjusted depending on the
requirements of each situation. Each camera can have different recording setup from
on “incident” only to recording 24 hours a day. The DVR also acts as a “multiplexer”,
allowing the user to view multiple cameras at the same time.

Cameras

CCTV cameras are available in many different types. The camera creates digital
images and passes these onto the DVR for viewing and recording. There are 1000’s
of CCTV cameras available ranging from internal black and white through to very hiresolution
external weatherproof colour cameras is for detailed verification purposes.

Sensor in / Alarms

The DVR can connect to external devices that will tell the DVR that something has
happened and that it should start recording on a certain camera. This could be a
movement detector or similar. The DVR can also “alarm out” when it detects
movement. For example the DVR could advise the telephone system that movement
had been detected on a certain camera and the telephone system would ring a predetermined
extension.

VGA Monitor

Typically these are LCD screens that can be desk or wall mounted. The monitor
allows the CCTV owner to view either a certain camera or range of cameras.
Alternately, the user can setup the DVR to switch between cameras automatically.

Remote Viewer

The remote viewer allows the CCTV owner to view images from the on-site system
from any internet connected PC at any location. This PC may be on the same site and
can be at any location with a broadband internet connection.

• Points to consider when choosing or thinking about CCTV
• DiMax Digital Video Recorder range
• Camera range

We will be happy to advise you further on our CCTV systems, please contact us: sales@systemcareuk.com