CCTV Cameras being the most common appliance for Digital Security, many people have questions and confusions about getting CCTV Cameras installed for their premise, it may be a home, office, school, industry or even a small shop. Of course you are at the right page for your CCTV Questions and clarifications. We have given our best answers for your questions out of our 12 years of professional experience. We love to clarify any additional questions you may have apart from the below mentioned. Please post us your query below and we will try to give you the best solution.
Based on connectivity
Based on Application
In CCTV where a camera's chip can be, for instance, 1/3-inch format, a 'wide-angle' 2.8mm lens offers a horizontal field-of-view around 80 degrees; a 'standard' 8mm lens offers around 30 degrees. Focal Angle is reciprocal to the focal target distance. If you want to install in a 20 x 20 room, 2.8mm is recommended as it covers wide area with short distance. When it comes to a street or passage, 8mm is recommended as we require narrow view and for long distance.
A regular 3.6mm lensed security cameras can see about 155 feet (47.24 meters) but the recommended distance for clarity is 20mtrs. Night vision distance depends on few factors including: the number of light emitting diodes (LEDs) on the camera board, the strength of infra-red sensor (measured in nanometers) and quality of the camera.
The single most common resolution on the market today in 2020 is 2MP (1080P). However, up to 8mp CCTV Camera is now available in market. It also depends on the application of CCTV Cameras that you should prefer higher resolutions.
Analog High Definition (AHD) cameras measure resolution in pixels instead of TVL, which older Analog cameras use. Though the appearance and installation is same, AHD cameras support high resolution than Analog Cameras.
Most CCTV cameras do operate in black and white during the night, and many security cameras adopt a monochrome filter during hours of darkness. Not only can infrared cameras see in conditions of total darkness, but they can also travel through smoke, dust and fog, capturing a clear image. Recent technologies have developed Star-light Cameras supporting colour images in very low light.
Though IP is an abbreviation for Internet Protocol, an IP camera system will work perfectly fine without an internet connection. It only require a local intranet with WiFi connectivity.
No, not all cameras have built-in audio. There are certain models of CCTV cameras supporting audio with in it. We can also install an external microphone to record audio, if required.
720p HD camera resolution provides images that are 1280 x 720 pixels (that adds up to 921,600 pixels, which means a 720p HD camera is not technically a megapixel camera), and 1080p HD cameras provide 1920 x 1080-pixel resolution, or 2.1 megapixels.
However, depending on the location dome cameras are used more frequently indoors, while bullet cameras are more frequently installed outdoors. Dome cameras are more discreet, so they tend to blend in better with their surroundings, making them a better choice for interiors.
The short answer is that CCTV cameras will not work when there is no electricity.
As NVR recorders receive a pure digital signal from the cameras, video quality is better than a DVR at the same resolution. In addition, as DVR recieves alanog signal, there might be disturbances in the signal line causing weak signal strength and distorted image.
On an average, 1 TB of Hard Disk can store about 10 days of continuous recording of 4 cameras. Further, there are many factors to be considered like – Recording Resolution, whether continuous or Motion Detection Recording is enabled, Only Video or Audio also, etc
For any private property security system, the recording duration depends on our requirement. But, many organisations, schools and public service offices require CCTV video recorded and archived for 90 days or more.
One of the biggest disadvantages of CCTV use deals with privacy, especially when used in the workplace. While it may be there to help keep employees and customers safe, they may object to being filmed under constant surveillance. Employees may also feel like they aren't trusted, which is not good for business.
Once you connect the cameras to the NVR (network video recorder), the cameras will record and save to the NVR without accessing your home router network. No one can hack into the private camera subnet unless it is connected to the public network.
To answer this question, NVR can function even without WiFi. Just make sure that it is always connected with the cameras through intranet (local network) using WiFi or Cat6/Cat5 physical interface.
Wireless systems connect to your Wi-Fi network (either wirelessly or with a cable), however, do still require wired power. Installation is one of the main benefits of wireless systems as compared to wired systems. How ever, wireless cameras do atleast power supply to be wired from any nearest available source of power. As such, wireless cameras are more flexible in terms of mounting locations but the wireless signal strength to be considered
A combination of two cables, it is made up of RG59 and 18/2 cable, the former for video transmission and the latter for power supply. In other words, since RG59 is a coaxial cable, it helps in running the video to the security camera, whereas 18/2 cable helps in the AC/DC power to the camera.
Ofcourse, Cat 6 cable can be used to connect AHD cameras with Video Balun. However, Co-axil cables are the best for AHD camera interface.
Depending on the type of cameras used, whether IP or AHD, cabling is done. However, AHD cameras can still be connected through Cat6 cable but IP cameras can't be connected through Coaxil cables. If you have planed to go with IP cameras any time in future, once for all go with Cat6 cabling.
A video balun is a wire connector device that allows UTP cable (such as CAT6) to transmit the video signal from CCTV cameras instead of using coaxial cable such as RG59. Some video baluns have power terminals in addition to video.
With passive video baluns with a Cat 6 cable we can transmit colour video as far as 300 Mtrs. If we are using the cable to power cameras and also transfer video signal, then it is recommended to run a top distance of about 150 Mtrs to avoid voltage drop.
The most common coax cable used in CCTV installations is RG-59U, which will provide an acceptable quality video path from a camera to the head end out to 250 mtrs. Coax CCTV installations are very straight forward. Make sure that the cabling distance doesn't exceed the maximum recommendation.