Exactly how does a CCTV DVR function?

A CCTV digital video recorder (or “DVR” for short) is mainly a PC that saves security video graphics to a disk drive. A lot of security cameras used now record an analog picture. The DVR changes the analog signal to digital after which compresses it.
A lot of cameras can be connected to one DVR. DVRs commonly consist of 4, 8, 16, or 32 camera inputs. The DVR will let you view all of these images at the same time or individually, and all of the video is stored to the hard disk drive. Extra switches, quads, or multiplexors aren't necessary.

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