Specifications:
CCD IP Camera:
NVR:
NVR Main Functions:
1. NVR Live Video:
2. Recording and Replay:
3. Calling:
4. Management:
5. Alarm:
NVR Technical Performance:
Package Included:
A DVR works like a VCR. Instead of videotape, a DVR uses a Hard Disk Recorder (HDR) to digitally record movies and television shows from your TV to a hard disk (like the one in your home computer). DVRs record in real-time, which allows you to pause or rewind at any point in the program.
DVRs also have networking capabilities that allow you to transfer your digital pictures to your DVR. Some even allow you to hook it up to your receiver. You have many options.
Using a DVR is quite simple: you hook your cable or satellite line to your DVR and plug your DVR into an electrical outlet. There are additional set-up steps if your home entertainment system includes a VCR or receiver or if you are hooking it up your home network. See your manufacturer�s web site for the steps.
The most common use for DVRs is the recording of movies and television shows via your cable service. Recording movies to your DVRs provides more storage (some offer up to 300 hours of recording) and better recording quality than videotape.
Since DVRs record in �real-time� DVRs allow you to fast-forward, rewind and pause of live shows. Also, some have channel search capabilities, which allow you to search for shows by director, topic or even actor. Most will conduct nightly downloads of your cable, antenna or dish service�s listings for up-to-date viewing.
The most common DVR is TiVo. You can purchase a special TiVo DVR or purchase a manufacturer DVR that includes TiVo capabilities. Or you have the option of using DVR receiver services from your cable company. This option requires no hardware as the DVR receiver is integrated with your program menu. You simply order the service from your cable company, and you�ll be able to use your DVR services straight from your program menu and remote. Shop around and see which service would suit your needs.
Some DVRs now have online capabilities. You can hook your DVR to your home network and schedule to record your favorite show or movie from the Internet (if you TiVo or similar software). Or use your DVR to organize and store pictures from your digital camera.
In situations where events need to be monitored at night, black and white cameras are used with infrared illuminators. Infrared light is used because black and white CCD cameras have very good sensitivity in and near the infrared region. These are wavelengths longer than 7000nm (nanometers). The human eye can see up to 700nm wavelength, and anything above 700nm is invisible to the human eye. Most infrared illuminators come in 730nm, 830nm, and 950nm wavelengths. These infrared illuminators are invisible to the human eye, and that's why they're perfect for night monitoring. You will be able to see in total darkness with these infrared illuminators, without anyone knowing.
The varifocal lens is ideal in situations where the security camera surveys a distant point. One can adjust the zoom and focus of these lenses, either manually or automatically. This is sometimes referred to as "manual zoom" lens.
