At first, a CCTV camera has characteristics similar to any traditional camera you know (like the camera on your cell phone) because it has a lens that directs light to an internal image sensor, but the similarities end there because in an analog camera there is no internal SD card for recording.
An analog camera captures images using a lens, image sensor and the internal circuitry system generates the analog electrical signals that are sent through coaxial cables to an external recorder (known as DVR) that converts analog signals to digital format for local recording and remote access.
