You can get a recording of lapsed time from 24hrs to 960 hrs, everything will depend on the needs of the application. Digital DVR recorder: Technological advances in computing and networking systems have been reaching out to the security industry and recording methods have implemented digital technologies for achieve a better evidence. The digital video recorders (DVRs) now converted analog CCTV systems video in digital systems. To convert analog to digital video evidence, we get a large number of benefits, such as being able to store the video on devices such as floppy disks, CDs, hard disks, etc.; In addition to being able to transmit this information over a telephone line, data networks or the Internet. The digital video recorders also provide great flexibility for quick searches, printing images or only back up valuable information. Now you can choose between a VCR or DVR, according to your needs. SYSCOM manages an extensive line of both. PC s converted into VCRS: market capture video cards which can be manufactured VCRs from ordinary computers.
For any reason we recommend this technique because it is extremely unstable and does not represent any reliability for the user. Although it is a solution economic, it begins to cause problems in a few days. CAMERAS with motion: Thus far mentioned cameras have been fixed with fixed focal length lenses. In many applications the area to be covered could need many fixed cameras. The solution for this is the application of cameras mounted on a mobile platform. This platform can be controlled from a remote location.
The platform can be simply rotated in a horizontal plane and is generally known as a scanner. Alternatively, the platform can be controlled either in the horizontal or vertical plane and is generally known as a Pan Tilt unit. A basic system is shown in diagram 8. The appearance of domes with internal cameras moving in recent years meet the requirements of virtually any application. With the ease of being able to rotate up to 360 in less than a second, and have vertical movements of up to 94 and zoom up to 220 x or more, this type of domes they are becoming a necessity for any type of application. The drivers for this type of domes have the versatility of generate positions preset by the user as well as controlling dozens of domes from a single point. Diagram 8 shows a system of domes in a CCTV system. Diagram 8.-basic system of moveable cameras. Cameras can be installed in interiors or exteriors. When these are used outdoors always require a cover for protection. For interior applications, environmental or aesthetic content dictate when covering is required. Systems can contain a combination of both types of cameras, fixed and mobile. Diagram 9.-system multi camera. OTHER considerations: This is an introduction to the CCTV. The latest developments include the concept of recording many cameras; nearly real-time images over telephone lines; true real time images to color over ISDN telephone lines; the switching of hundreds or thousands of cameras to control from different separate positions toward dozens of monitors; reliable detection of movements through an electronic evaluation of the video signal; immediate full color printing, in seconds or from a camera recorder; the replacement of manual controls with the simple fact of touching the screen.