Q:What is the difference between a camera and a monitor?

Monitor (accurately should be called the monitoring system), including video surveillance system, infrared monitoring system, audio monitoring system and so on. Among them, the video surveillance system includes a camera (surveillance camera).

Q:What is the reason for monitoring the camera's black screen?

Fourth, the monitoring of the video signal line broken (including line damage, poor contact), but also cause a black screen.

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

(2) If there is only one hard disk recorder, you do not need to purchase the switch, and use the crossover cable (one end of the other end B head) to connect the hard disk video recorder and computer can be. Use the computer to access and control the hard disk recorders: use IE browser in the address bar typing http: // hard disk video recorder IP address: port number to open the login page, enter the hard disk recorder administrator account and password on it.

Q:Monitor camera parameters how to see the bigger the bigger the better?

Lens focal length and angle Focal length Specification angle 2.1 mm Small lens 1/3 150 ° 2.5mm. Small lens 1/3 130 ° 2.8mm Small lens 1/3 115 ° 2.8mm. Fixed aperture 1/3 115 ° 2.8mm 1 / 3 96 ° 4mm 1/3 78 ° 6mm 1/3 53 ° 8mm 1/3 40 ° 12 mm 1/3 23 ° 16 m 1/3 17 ° 3.5-8 mm 1/3 96 ° - 45 ° 6-15 mm 1 / 3 54 ° - 23 ° 6-36mm

Q:Monitor the camera in the monitor screen appears in the camera 001 what meaning

Specific recommendations to ask the two manufacturers of equipment. Personal feeling should be the camera with their own figures.

Q:What is the number of lines that a surveillance camera needs to use?

If it is a network camera is a network cable on it, the network camera to install the pickup, audio, video signals transmitted through the network.

Q:Ready to engage in a facade ... to help people engage in monitoring. General how much of this type of profit. How to charge.

Camera technology in this country has been very mature! Profit margins and before is immeasurably! Now you can do this i do! Products are almost! Business only to reduce the price to win the market! Now a lot of camera manufacturers struggling, there is no sales they simply can not live! The price is also very transparent! Chips are the same, why are you expensive for me? Of course, except for the relationship! So now this line is not very good to do! If there is a relationship, get a brand! This piece can still be considered!

Q: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.

Q:Hello, because no electric video recorder did not manually set, but I would like to look back a few days before the monitor can be transferred out

3, the operator will not operate the hard disk video recorder, did not correctly follow the normal steps to call the DVR video. 4, hard disk video recorder motherboard problems.

Q:Monitor knowledge! 1.2 m × 20 meters of the corridor with a large angle of the camera the best?

According to my experience, the first with 6mm lens, the second with 3.6 or 4mm lens is better.