How to install Wired Camera?
For long distance transmission, it is not enough to be able to see the other side but the Fresnel zone needs to be clear of any obstructions, or at least that 60% of the first Fresnel Zone must be clear of obstacles.
In the conversion and reading processes, CCDs consume lots of electric power. CMOSs operate on lower voltage and therefore consume much less power. The difference in consumption is as much as 100 times. Accordingly, CMOSs have much longer battery life than CCDs.
CCD sensors have been in mass production for a long period of time and therefore a more mature product than CMOS sensors. CCD sensors tend to produce higher quality and more pixels. As a result, the images produced by CCD sensors are much better than those from CMOS sensors.
The third major difference between these two sensors is that the manufacturing costs of CMOS is much less expensive than CCD.
Based on these differences, you can see that CCDs tend to be used in cameras that focus on high-quality images. CMOS sensors tend to have lower quality, lower resolution and lower sensitivity. There is a trade-off between higher image quality but higher power consumption (CCD) compared with lower image quality but longer power consumption (CMOS).
The technology in these models is basically same for different models, except that the camera may consist of either a CMOS or CCD image sensor, and the product size is also different for different purpose.
To overcome the disadvantages of wireless camera, you may:
(a) Buy those wireless models operating with less commonly used frequency band; (b) If the distance between the wireless camera and the receiver is long, or there are walls, trees and other obstacles in the transmission path, buy a wireless model with higher transmission power, that is, a transmitter with longer transmission distance; (c) Using high gain antennas for the transmitter and/or the receiver will definitely improve signal transmission/reception. (d) Place the antennas in a high location so that they can "see" each other.
Overall, the video/audio signals from a wired camera are more stable than a wireless camera.
NTSC and PAL standard are not interchangeable. Video input from a PAL color camera on a NTSC only TV will be displayed in B/W only, not in color.
Unless it is indicated in the product description that the camera is only available for certain video format, or you specify a video standard in your order, we will ship camera according to the common video format currently used in your country. For example, NTSC camera for orders from United States and Canada. For orders from Europe including U.K., we will ship PAL standard camera.
Choosing a suitable lens for your security camera, you need first to determine how far you want to monitor the scene. A 4mm lens will give a 72 degree visual angle of view for a person's face detail in about 30 feet. This will be adequate for most home or small office surveillance system. Based on this calculation, a 8mm lens will give a 40 degree visual angle and zoom in 2 times of the view in the same distance. Accordingly, a 16mm lens will give a 20 degree visual angle and zoom in about 4 times of the view in the same distance.
If you need to change the monitoring distance at times, you may choose a varifocal lens instead of lens with fixed focal length. With a few simple adjustments of the lens, you will be able to zoom in and zoom out and focus a clear picture of the scene. There are various focal ranges offered by the varifocal lens, i.e. 3~8mm, 8~15mm etc.
Auto iris lens
An auto iris lens is a lens that automatically adjusts the lens aperture based on the strength of the incoming light source. If the security camera is installed in the office, you probably don't need an auto iris lens because the light source is stable. If the camera is installed outdoor, you may need an auto iris lens because the light source may change through the day.