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

Optical (transmitter) is the camera output of the electrical signal is converted to optical signals, through the fiber to the signal transmission to the control room, and then (the receiver) will be converted to electrical signals into electrical output to the hard disk video recorder.

Q:An accurate calculation formula for monitoring the focal length and actual distance of the lens

While the use of long focal length lens can see the car's license number (the car occupies most of the area on the screen), but can not monitor the entire car park

Q:Monitor inside the infrared network camera infrared light automatically switch and synchronous switch What does this mean?

Synchronous switch has not heard, another set according to set the time to switch. For example, set 18 points to night into black and white

Q:I want to install a set of monitoring, a total of 15 cameras, the farthest camera from the hard disk recorder 500 meters, how to install? What equipment?

Need to install the video capture card and monitor the number of camera cameras to determine the number of acquisition cards (a collection card with four cameras), if the future will increase the camera, you can directly use 8-way card card collection of about 300 yuan, about 200 camera To a few thousand range

Q:Can I monitor the camera?

Monitor the camera can focus on it? Otherwise, when you buy the camera, there are "distance" to buy. However, the general camera does not have auto focus function. The focal length is the manual "fixed" focal length. High-end and dedicated camera with auto focus, manual zoom function.

Q:How to use the network cable to connect the surveillance camera?

2, some camera is a digital camera, direct use of cable digital transmission of video, cameras and video recorders are connected through the network cable on the switch, are transmitted through the network video.

Q:Monitor how much power the camera has

General camera are 5W (with infrared) high-end are 10W ~ 50W ranging from the need to confirm the specific model (the manual will have).

Q:HD surveillance cameras are common faults

4) whether the software used and the camera match (because the company before the camera has a dynamic IP and fixed IP points, the software is also different);

Q:How to make cable monitoring camera temporarily failed

2. with a laser pen on the camera to shoot what he can not shoot down the camera are automatically exposed but there is a light it automatically reduce the exposure.

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