As the names suggest, the quality of these cameras is a function of the analogue signal.
Analog signals are constantly exposed to noise. Alktrvmghnatysy of noise and noise caused by power fluctuations always a serious threat to the quality of analog CCTV cameras are.
Why use high quality cables and equipment in this type of camera has a considerable impact on image quality.
When the camera is sending images and sound wirelessly from a poor show.
If the images are transmitted as analog signals from the analog frequency range is used, and this affects the image quality more than the waves of noise and interference can. It is also possible to monitor images to anyone else in the area can be easily provided. So it can never be safe and secure way to send analog images.
To capture analog option is turning to digital systems. So eventually have to be converted from analogue to digital images. For this purpose, the device "capture digital images" Zexon NVR is used. NVR-specific devices are analog recording and camera control. This device also provides network control and digital communication.
Due to lower prices of digital cameras and analog cameras as CCTV cameras are widely known in the market. Recently, however, the digital market is going up, and many organizations are oriented towards IP cameras, still cameras are rapidly replacing the older generation with the new generation of cameras.
Advantages of analog cameras:
- Low Prices
- Simply install the cameras
Disadvantages of analog cameras:
- Analog Quality: lower quality than digital
- Ability to noise: the use of analog systems
- The high cost of wiring
- Low quality and insecure wireless
As mentioned in the market as still cameras and analog CCTV cameras commonly used. Perhaps one of the main reasons it did not require knowledge of the network. Many companies make their employees to set up and install cameras at the train and the train is relatively complex network of digital cameras are regardless. Therefore, the demand market is much higher than analog cameras,ZEXON IP cameras and network.
This Zexon camera also importers to import more analog than digital camera leads. However, one of the main advantages of analog cameras is their lower price.
Although the low prices on large projects in high wiring costs be damned. According to this principle, each camera is connected to a control device and a separate cable with the increasing number of cameras and the distance between the camera and the cause enormous cost.
Image by coaxial cable to the cameras that are connected to a central recording, analog cameras, and video surveillance system that is based solely on the design and implementation of these cameras, say analog video surveillance system.
In the past, this camera will be recorded on magnetic tape, but due to lack of technology and cost effective system currently, images were saved converted to digital analog the by the ZEXON Network Video Recorder.
Analog systems implementation projects for small, more affordable, but the image quality is limited in this system compared to digital systems, the lack of encryption of data during transmission and limited intelligence, and in some small projects medium will also have to use other systems.
Advantages of analog CCTV cameras:
- Most of the equipment costs less than digital cameras.
- Easier to use and requires less expertise.
- Some small and medium size project cost, the cheaper it will be.
- For maintenance, it is less complicated.
- Coaxial cable can be up to 500 meters, the images are transferred while network cables up to 100 meters have the ability to transfer data.
Disadvantages of analog CCTV cameras:
- Cabling volume in the system is high.
- Image cords and cables should be drawn separately.
- Ability to save and view images simultaneously from several points of good quality, is not possible.
- Ability to define access levels for different users, and can not change it.
- Making the smart cameras is possible only by the ZEXON Network Video Recorder.
- Motion control cameras often have separate cabling to be done.
- It is very difficult to change the location of the control room.
- Maximum 0.4 mega pixel image quality for each camera there.
- Analog cameras due to limitations on the use of standard (PAL / NTSC) for each picture twice and with time delay which caused a sharp drop in the quality of scanned images are animated.
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