Q:Wireless surveillance camera security is not? Easy to be peeped not? LAN and external network access speed how?

That visit is the time of video transmission, of course, will be faster in the local area network if you want to visit soon need to have a high bandwidth of LAN connection.

Q:What is the difference between monitoring cameras CCD1 / 3 and 1/4?

The bigger the CCD is, the better. There are now 1 inch, 2/3 inch, 1/2 inch, 1/3 inch, 1/4 inch. 3.6MM lens distance of about 8 meters 6MM lens distance of about 15 meters 8MM lens distance of about 25 meters 12MM lens distance of about 35 meters is the larger the lens, you can see farther things, but see the face very little difference is 1 / 3 lens of the light through the small aperture

Q:Monitor the video recorder has been unable to work what is the reason

VCR hard drive problems. You can remove the hard drive, try to run a separate video recorder;

Q:Elevator in the monitor camera lens focal length with the number

Usually 3.6 mm lens angle can cover the entire elevator, 2.8 mm wide range for more space for the elevator. The larger the number of millimeters, the narrower the angle of view, look farther

Q:Remote monitoring principle

First, the video signal from each camera is input to the RV-2000 video capture terminal. Then, the RV-2000 video capture terminal converts the video signal into a digital image of 25 frames per second through the MPEG-4 image compression algorithm, After the audio and video data stream through the optical fiber network forwarded to the video monitoring center; Finally, the video monitoring center of the computer to receive the front of the image and sound data from the decompression and through the computer display screen and sound card for real-time monitoring.

Q:What is the meaning of monitoring the camera mm?

The focal length is the measure of the aggregation or divergence of the light in the optical system, which refers to the distance from the light of the lens to the focal point of the light gathering. Is also the camera (class camera) system, from the lens center to the film or CCD and other imaging plane distance. Simply say that the focal length is the distance between the focus and the vertex of the mirror.

Q:Digital camera and analog camera difference

2, digital camera: refers to the camera image processing and signal recording all use digital signal to complete the camera. The biggest feature of such a camera is that the signal recorded on the tape is a digital signal, not an analog signal. Digital camera into the image signal by the CCD into electrical signals, immediately by the circuit digital, and then all the records before the processing of all digital processing, and finally processed the digital signal directly to the tape or memory card.

Q:Monitor camera lens 4-6-8-12-16MM difference.

4 of 3-4 meters wide angle of 45 degrees, 6 of 6-8 meters wide angle of 38 angle, 8 of 8-12 meters wide angle of 35 degrees, 12 of 12-15 meters wide angle of 30 degrees, 16 of 20 meters / wide angle 27-28 degrees,

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.

Q:Monitor the camera infrared light does not shine what is the reason

Daylight is not bright, or only see the little red dot, because the infrared light only issued infrared light. People can not see, only to see the red red dot red