Q:What is the black box that monitors the camera connection?

DVR is usually used analog (DVR) and network (NVR) two, look at the interface behind the fuselage can distinguish. DVR according to a few video input will have several BNC input interface, NVR is not.

Q:20 meters away with the number of mm monitor camera lens appropriate?

1/4 "CCD lens in the line of sight with 1/3" CCD no difference, but the angle will be more narrow, while the shooting of the object will appear taller.

Q:What is the number of lines that a surveillance camera needs to use?

2, video cable (transmission video signal, syv75-3, syv75-5, syv-75-7 these three are the most commonly used)

Q:I said is the monitoring of the camera, not what home with the camera, you can monitor the leader can also record the software, or hardware did not?

Of course, just add a pickup on the line.

Q:Monitor the difference between the camera 720p and 1200 lines

P and line, are the unit of image clarity, but P is used in the digital system, the Chinese full name for the pixel, and the line is used in the simulation system, the Chinese full name for the TV line.

Q:Police surveillance camera and civilian What is the difference?

Police monitoring camera and civilian is not much difference, according to the project budget to choose the right price of the product on it, there is a military equipment, need to go through the relevant military certification, as long as the relevant military certification, and ordinary equipment is very Big difference, at least the price can be put up.

Q:What is the maximum visual range of a video surveillance camera?

And the lens, light board angle, detailed advice Jinrui as surveillance cameras

Q:Monitor how much power the camera has

The general camera is 5W (with infrared)

Q:What is the 960h in the surveillance camera?

DVR can also achieve the effect of 960H program. Samsung 650 cable cameras are used 960H program, the same effect to reach the 650 line only in the case of the use of 960H program can be achieved.

Q: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.