Digital Wireless Home Surveillance CM-4

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· 4CH digital wireless camera & DVR system, no interferences, no privacy leak
· Simple installation- no video cables required!
· 2.4GHz digital wireless receiver with integrated video recorder
· Support up to 32GB SD card or external 1TB mobile disk by USB2.0
· Support 4 cameras/ 24hours /7days non-stop overwrite recording
· Multiple recording modes: manual, schedule, and PIR activated
· 5meter night vision range
· Video quality: 4CH VGA 30fps
· Indoor cameras with 300 m/1000ft transmission open range
· AV output function for monitoring
· IR-cut filter embeded

Q: What is the meaning of the high definition and standard definition of the surveillance camera?: Sub-level is not the same, there are industrial-grade, home-class, high-definition standard than the standard standard strict.

Q: 960P HD network camera stored one day more G?: 41G, vision of the world network is very good, I used

Q: Monitor camera resolution 752 * 582 is high HD it: HD usually refers to 1280 * 720 (referred to as 720P) or 1920 * 1080 (referred to as 1080P). 752 * 582 is not high definition.

Q: 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.

Q: Monitor the image of the camera appeared black and white colorless situation, is this how is it?: First of all, you first look at the monitor is not set to black and white and then in the hard disk video recorder you look at the system is not wrong

Q: What is the minimum illuminance indicator of the surveillance camera?: Therefore, the use of different F value of the lens, the camera's minimum illumination value of the determination will have a decisive impact. Second, the light source color temperature. The color temperature is an indicator of the light wavelength content in the light source. A 3200K light source is mostly between 600 nm and 900 nm, and a 9300K light source is between 300 and 500 nm, so the different color temperatures will change completely Test Results. On a typical CCD sensor, a light source with a wavelength of 600 nanometers will produce 10 times more electrons than a wavelength of 900 nanometers. This is why the color temperature is particularly marked for the meaning of the minimum illumination measurement results.

Q: Home monitoring system which brand is better: Home surveillance camera in the design to be compact, not because of the size of the camera and easy to attract attention, should not prevent family life.

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?: The general home about three hundred of the camera can need a power cord (then 220V mains), a 12V power supply, a video cable (connected capture card) video line with 75-3 line on the line, the line needs to use two BNC head to connect the camera and capture card software, the collection cassette with a CD-ROM, a collection card driver and monitoring system, the installation is relatively simple

Q: Does the infrared surveillance camera automatically alarm when someone enters the monitoring range?: The camera itself does not work, through the acquisition card, or hard disk video recorder, you can detect the mobile body will alarm,

Q: An accurate calculation formula for monitoring the focal length and actual distance of the lens: The size of the imaging scene and the size of the imaging object are contradictory, for example, with the same camera to monitor the same parking lot, the choice of short focal length lens can be the entire parking lot to monitor and see the entrance Outside the vehicle out, but can not see the car's license number (the car in the monitor screen only occupies a small area)

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