Cctv Home Security Cameras
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There are cameras at the fork in the expressway
- The first speed camera is a shape like a rectangular box, play a decisive role is actually connected with the radar module. Radar detection vehicle over speed will be linked when the camera to take pictures of evidence. The speed radar uses the Doppler effect principle. When the vehicle approaches the radar antenna, the reflected signal frequency will be higher than the transmitter frequency. When the vehicle is away from the antenna, the reflected signal frequency will be lower than the transmitter rate. This can be calculated by the frequency of the value of the target and the relative speed of the radar.s
What color is the monitor when the camera is turned on?
- Most of them are red, there are white light and no red light at night no light, and the specific relationship between the wavelength of infrared light.s
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 degreess
960P HD network camera stored one day more G?
- See you set the code stream is how much, if the real time, full frame recording, then 24 hours is about 40Gs
Monitor the camera hemispherical gun shape which is good
- Both are different from the installation site, the dome camera is only installed in the indoor site, gun camera can be installed indoors can also be installed outdoors. The dome camera lens due to the installation site is small, it's fixed lens only 3.6 - 8MM three; and gun-type camera it's fixed lens to have a variety of 3.6--16MM, so it's big camera Far more, but according to the angle of the small lens is not wide.s
Home wireless surveillance camera price, how much money?
- HD network monitoring system is a popular in 2004, a high-definition home monitoring system, the main device is the wireless network camera. If you choose Puqing 30 million pixel price about 180 dollars or so, if it is 720P million HD price about 380 or so, with a 32G memory card price is about 140, computer display 500 yuan, so down the total About 820 yuan to 1,000 yuan or so. Of course, the above does not include the relevant accessories and storage control network DVR.s
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.s
A camera for an hour how much space
- Depends on your video recorder video format is CIF or D1s
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