Q:Buy monitor camera attention to what

1, how to identify civilian high-definition camera? In general, civilian-grade optional cameras are all to 420 lines, 480 lines, 520 lines, etc. to represent the clarity of the camera, that is, on the monitor level Number of lines scanned. So the so-called business mouth of the pixels will be insignificant, because often will be exaggerated, in fact, difficult to achieve, so the civilian choice of monitoring the head should not be a measure of pixels. According to the interpretation of professionals, the usual surveillance cameras only two grades: low 330 lines or so, high solution 480 lines or so, many domestic products marked 420 lines is the 330 line products

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:What kind of surveillance camera is good

The aperture is large, the image will be relatively clear), the aperture (the greater the aperture, the lower the light the better the imaging effect), if no lights at night, then the infrared function, you do not have to consider the PTZ. According to these parameters to sell security shop can buy the right

Q:Monitor the camera lens focal length is what the situation according to the scope of the big focal point what the situation according to the clear

The larger the focal length, the smaller the field of view, the larger the person in the picture, the clearer the detail.

Q:Monitor the camera why the black screen?

Fifth, the control camera control equipment, such as DVR / NVR / capture card, check its related software is running properly, whether the latest version, if not suggested to contact the manufacturer to upgrade the software can be.

Q:960P HD network camera stored one day more G?

To see the set of the stream to 2M of the stream to count, 2M * 60 * 60 * 24 ÷ 8 = 21600M = 21.6G

Q:There is a surveillance camera, want to adjust the location, hand touch the head, even live, do not know how the matter

There is one may be your power leakage, and this will be carefully checked, the host, the camera power supply, to prevent human shock, some equipment, metal shell is best connected to the ground.

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?

What brand of network camera do you use? Is it safe for Shenzhen? Their home is relatively simple I take this to you: you have to re-add equipment in the external network, you put the serial number of the device into the re-enter (rather than search, search out all the network), add good You can see

Q:Monitor how the camera will suddenly no color

2, the normal light, manual control with a switching function of the camera to black and white mode;

Q:Monitor the camera often flashing why

Video head problems, poor contact performance. The video head to try again.