Q:What is the difference between a dome camera, a gun camera and a dome camera in security monitoring?

Ball with the above two biggest difference is that the ball can control the keyboard to control, generally installed in the need to monitor the relatively large range of the hall, outdoor large area. General bolt and hemisphere price almost. Cheaper on the hundreds of pieces, good also two or three thousand. But the ball will be very expensive, made in the thousands of good brands will reach two or three million.

Q:What is the meaning of the camera function heartbeat?

In the previous case, the implementation steps are as follows: 1, in a unified authentication system to open a "heartbeat" thread, the timing of the implementation of a visit A system operation, access to the A system S interface; 2, A system to achieve an interface S, Function for each access to an access request, then record a record of access, for example: 2009-3-18 fw 3, System A also need to also open a "heartbeat" thread, not separated by a certain time, access to the interface S is done Visit the record to see if the last record of the old record logo, if not, then prove that the single point of the system has the latest "heartbeat" came, its function is no fault.

Q:Monitoring camera 6mm 8mm 12mm 16mm length and width can be according to how much.

According to the imaging principle, the smaller the focal length, the wider the field of view, but the distance is not clear. The larger the focal length, the narrower the field of view, but the longer the distance will be clearer.

Q:What is the number of millimeters that monitor the camera?

And then the zoom is generally wide angle is more than 90 degrees above the normal is about 30 degrees long focal length is less than 20 degrees

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

1, the power cord (12v power supply and 220V power supply, dvvr2 * x, is to the camera power supply)

Q:6mm camera and 3mm camera What is the difference

2, the smaller the lens to see the greater the angle, on the contrary, the larger the lens to see the smaller angle;

Q:Hai Kangwei as the camera mapping problem

Here the network situation is so drop. A TP wireless router, a fiber cat, a monitor, two computers, and N mobile phones.

Q:What do I need to do with video surveillance systems?

The monitoring system is composed of a large part of the camera, transmission, control, display, record registration. The camera transmits the video image to the control panel through the coaxial video cable, controls the host computer and assigns the video signal to each monitor and video equipment, and can simultaneously input the voice signal to be transmitted into the video recorder. By controlling the host, the operator can issue commands to control the up, down, left and right movements of the pan / tilt and zoom in on the lens, and can be controlled by the host in multi-camera and PTZ Between the switch. The use of special video processing mode, the image can be input, playback, processing and other operations, so that the video effect to achieve the best.

Q:Camera gun 4MM, 6MM refers to what?

General camera commonly used lens specifications are 4mm, 6mm, 8mm, 16mm, 25mm and so on.

Q:Monitor the flash indicator on the DVR panel

Are you buying a new hard drive? The hard disk must be formatted