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Elevator in the monitor camera lens focal length with the number
- Usually 3.6 mm lens angle can cover the entire elevator, 2.8 mm wide range for more space for the elevator. The larger the number of millimeters, the narrower the angle of view, look farthers
Monitor the camera focal length 3.6mm 4mm 6mm. What is the meaning?
- Mm is the lens of the aperture, the number of millimeters, not the bigger the better, the smaller the camera according to the wider picture, the larger the lens the more narrow the picture clears
Will monitor the camera should buy much. Room size of 8 meters 7 * 3 meters 3, is expected to use four camera monitoring head. Will the camera to buy much?
- Brand to see your own choice, and Dahua, Jing Yang, Hai Kang and the like better, the price is slightly higher.s
Will a 12V10A switching power supply with a few 12V2A surveillance camera? How far can its DC current output? Please have experienced master answer, thank you
- Most of the time with seven infrared one machine, the nearest infrared machine 15 meters, farthest infrared one machine 110 meters. Cloth RVV2 * 1.5 power cords
Monitor the camera live
- Generally the case is the reason for static electricity, in theory, if your camera is using a transformer, that is DC power supply, then basically can be excluded from the leakage caused by the low-voltage (DC12V) camera, if There is a strong power into the words, then the camera will not be able to use, and here to note is not only the camera will have static electricity on your own may also have static electricity, you may say the same two cameras have a One is not, but you have to know the principle of electrostatic discharge, only when you come into contact with the conductive body when the static electricity can be released, you will have the feeling of Ma. In fact, if the camera is used properly, you do not have to worry about whether it is with static electricity, if you really worry, you can ground the camera, the general ceiling has a fire pipe and bridge, you can choose them to ground.s
Network surveillance camera, at home, the mobile client can be used, but after the connection network, the client shows the ID is invalid, what is the situation?
- You use the wifi at home and your network camera is in the same network, and in the outside belongs to a different external network, before the landing mode is the way the network landing, so do not see outside.s
The monitor camera does not display the image on the display
- First, the camera is broken, two, the information line and plug the connection is not good, three, the camera driver is not installed, the resolution is too high tune.s
What is the difference between a camera's double point and a single lamp point?
- Array infrared night vision technology, the essence or through the camera to launch active infrared light way night vision effect, but the use of advanced packaging technology, dozens of high-power, high efficiency of the infrared crystal package in a plane. The advent of this technology, access to the extraordinary rapid development.s
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