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:Does the infrared surveillance camera automatically alarm when someone enters the monitoring range?

General camera is not the end of the low-end camera does not have this function, you can use the alarm to linkage, the alarm through the infrared detection of some people come in, will alarm. There is an automatic monitoring area of the camera can be, once someone appears in a certain area will be the alarm, similar to the road to shoot the kind of red light. Very sensitive, but the cost is relatively high. The best infrared camera can find 300 meters of people, but it is expensive.

Q:Does the surveillance camera itself have a record storage function?

In addition, many of the network camera supports SD card video, you can video playback through the network

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

Visual range with the camera lens: General: 4mm angle of exposure of 70 degrees, about 6 meters away

Q:What is the meaning of monitoring the camera mm?

The focal length is the measure of the aggregation or divergence of the light in the optical system, which refers to the distance from the light of the lens to the focal point of the light gathering. Is also the camera (class camera) system, from the lens center to the film or CCD and other imaging plane distance. Simply say that the focal length is the distance between the focus and the vertex of the mirror.

Q:Camera monitor the recorded file 1 hour how much G ah?

With the hard disk capacity divided by the size of the daily video file and then divided by the number of cameras is the number of days to save the video

Q:Monitor the camera gray screen

2, the camera itself quality problems. Now a lot of domestic miscellaneous brand camera, the background running program is very poor, resulting in excessive heat of the camera, over time, there will be a variety of problems. The general situation is color black and white. Suggestions for hundreds of pieces for a good brand, for example: like a cottage Apple phone and the middle of the gap between Apple.

Q:I would like to install at home and back door two cameras in general how much money?

According to the length of the cable, the camera's clarity is good or bad, a good camera generally a 160 or so can, the two together also 500 almost.

Q:Monitor the flash indicator on the DVR panel

General panel will have a hard disk indicator, if it has been flash, that the hard disk is working (video), on behalf of normal

Q:How is the general surveillance camera connected to the computer?

(1) Turn off the computer, turn on the chassis, and install the video capture card in an empty PCI slot, as shown in Figure 1.25.