Today, the vast majority of CCTV cameras on the market will either record images through the use of an analog tape or a digital video recorder. If images must be recorded for extended periods of time, the use of special security time-lapse VCRs is likely. Such tape records are able to record both black and white images, as well as color images, for as much as 960 hours. The number of cameras that are connected will dictate the hours the video camera is able to record for. Moreover, the frames per second you want to record will be another factor. The cost-efficiency of VCRs is one of the main reasons people are drawn to them. They are also practical and reliable as well, which is why they are used in many circumstances.
Digital video records work in the same way that VCRs do on the whole. The main difference is that images are captured digitally from the camera. There are several things that need to be considered when it comes to how many digital images are going to be captured, including the frames per second recorded, the quantity of cameras that are hooked up to the DVR, the resolution the DVR saves images at, and the video compression used. You can get DVRs that are standalone devices, as well as those connected to computer systems.
CCD chips are used in most CCTV cameras that are part of home security systems today. The vast majority of the contemporary cameras will utilize CCD chips that are a quarter-inch in terms of size. The standard chip used to be a half-inch diagonal a number of years ago. However, manufacturers created smaller versions because of the heavy demand for them. However, the bigger the chip is, the higher the sensitivity and resolution that can be created. It is, consequently, a battle between size and performance, which is something to consider carefully.
Last but not least, we need to discuss the connection, as there is no denying that this is one of the most critical aspects when it comes to how a CCTV camera works and the technology that is behind it. You are going to have two options, generally speaking; either a fixed cable or a wireless connection. Most people today will always go for a wireless connection because they are then going to be blessed with the freedom to be able to place their CCTV camera pretty much anywhere they want to. Most wireless CCTV cameras will use 2.4 Gigahertz frequencies for transmitting the video images to the monitor.
The frequencies can differ if you have more than one camera in a specific area. Needless to say, all areas have differing operating limits. However, most people will find that 2.4 Gigahertz frequencies are more than enough when transmitting through obstacles, such as walls.
So there you have it: everything you need to know about CCTV systems and how they work.
*image credits: pexels