Q:Camera clarity, 1080p. 3mp. 4k, what does it mean

4K, that is, 3840 × 2160 pixel resolution

Q:20 meters away with the number of mm monitor camera lens appropriate?

1/4 "CCD lens in the line of sight with 1/3" CCD no difference, but the angle will be more narrow, while the shooting of the object will appear taller.

Q:How to connect a hard disk video recorder to a computer

(1) If it is in a local area network, as long as the hard disk video recorder inside the IP and computer IP in a network section on it. If you want to directly use the network cable can also, the method is the same, the first IP in a network segment, in a cross with the network cable can be connected through IE.

Q:Panasonic surveillance camera wv-cp704 / ch corresponding to which foreign models

First determine the problem, of course, is the discharge method: 1. LAN problems arise, then ping the camera's ip address, whether normal,

Q:Install the monitor camera need to put a few lines

A camera needs two lines, a video cable, one with the power cord, in addition to the alarm line, if you encounter an emergency situation, you can alarm, if you need to do monitoring the camera to install, you can find a news sensitive monitoring installation the company.

Q:What is the meaning of monitoring the focal length in the camera?

So, you want to see a wide range, to choose a small aperture of the lens, but to see the target will be smaller.

Q:Office area monitoring camera how to choose?

3, and then there is clarity, and optional analog cameras and network high-definition camera, which is higher pixels, the price is relatively expensive

Q:How many mm meters I use to monitor the camera

4, non-infrared camera power is very small, four cameras share a 2A power supply is sufficient, if there is no 2A, 1A line, but the power margin is small.

Q:The working principle of the camera with infrared light

Infrared emission diode (IR LED) infrared lamp principle is: by the infrared light-emitting diode matrix composed of light. Infrared emission diode from the infrared radiation efficiency of high materials (commonly used gallium arsenide GaAs) made PN junction, plus forward bias voltage to the PN junction injection current excitation infrared light. Spectral power distribution for the central wavelength of 830 ~ 950nm, half-peak bandwidth of about 40nm or so, it is narrowband distribution, for ordinary CCD black and white camera can feel the range. The emission power of the infrared light emitting diode is expressed by the irradiance μW / m2. The maximum radiation intensity of the infrared diode is generally in front of the optical axis and decreases with the increase of the angle between the radiation direction and the optical axis. The radiation intensity is 50% of the maximum value of the angle is called the half intensity radiation angle, that is, half power angle. The radiation angle of the infrared light emitting diodes of different packaging process models is different.

Q:Monitor the type and purpose of the equipment

4. Infrared camera, this camera in the case of light enough for the color, in the absence of light and light dark case, the infrared light to open, to black and white monitoring. Applicable to Internet cafes, underground passage, garage and other dark places.