-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
In video surveillance, engineers choose different transmission methods according to the actual situation, and the transmission components and transmission lines used in different communication cables are more different
.
Among them, the four communication cables that are used the most are coaxial cable, twisted pair, network cable and optical fiber
.
The coaxial cable is made of solid copper, wrapped with an insulating material surrounded by densely woven mesh conductors, and covered with a protective material
outside the mesh.
As a communication cable, its frequency loss, image distortion, image attenuation amplitude is small, mainly used in a small range of monitoring systems, due to the transmission distance is very close, the use of coaxial cable direct transmission to the image quality damage is not large, can meet the actual requirements
.
Generally, a dedicated SYV 75 ohm series coaxial cable is used as the video signal transmission
.
However, the coaxial cable is thicker, and it is not very convenient to wire in intensive monitoring applications, and it can only transmit video signals, if the system needs to transmit control data, audio and other signals at the same time, it needs to be wired separately, and it is affected by climate change, and the image quality will be affected
accordingly.
Therefore, in the video transmission process, the use of twisted pair to transmit signals has also become the choice
of most people.
Twisted pair is the use of twisted pair to propagate video signals, which requires the use of twisted pair transmission equipment
.
The function of twisted pair video transmission equipment is to convert the video signal suitable for SYV75 ohm transmission into a video signal suitable for twisted pair transmission at the front end; At the receiving end, the opposite processing is carried out with the front end, and the video signal transmitted by the twisted pair is reconverted into the video signal of SYV75 ohms, so as to achieve the transmission purpose
.
Network cables and optical fibers are mainly used for the transmission
of IP video signals.
With the deepening of the current network development process of the security industry, the application of network cables is also increasing
.
The main forms of network cables are Cat5 and Cat6 cables, one for short-distance IP network transmission; Optical fiber is generally used for long-distance video signal transmission, although it is very expensive in price, but optical fiber transmission has a series of advantages such as small attenuation, frequency bandwidth, free from electromagnetic wave interference, light weight, good confidentiality, etc.
, and has gradually become the darling
of communication cables.
In video surveillance, engineers choose different transmission methods according to the actual situation, and the transmission components and transmission lines used in different communication cables are more different
.
Among them, the four communication cables that are used the most are coaxial cable, twisted pair, network cable and optical fiber
.
The coaxial cable is made of solid copper, wrapped with an insulating material surrounded by densely woven mesh conductors, and covered with a protective material
outside the mesh.
As a communication cable, its frequency loss, image distortion, image attenuation amplitude is small, mainly used in a small range of monitoring systems, due to the transmission distance is very close, the use of coaxial cable direct transmission to the image quality damage is not large, can meet the actual requirements
.
Generally, a dedicated SYV 75 ohm series coaxial cable is used as the video signal transmission
.
However, the coaxial cable is thicker, and it is not very convenient to wire in intensive monitoring applications, and it can only transmit video signals, if the system needs to transmit control data, audio and other signals at the same time, it needs to be wired separately, and it is affected by climate change, and the image quality will be affected
accordingly.
Therefore, in the video transmission process, the use of twisted pair to transmit signals has also become the choice
of most people.
Twisted pair is the use of twisted pair to propagate video signals, which requires the use of twisted pair transmission equipment
.
The function of twisted pair video transmission equipment is to convert the video signal suitable for SYV75 ohm transmission into a video signal suitable for twisted pair transmission at the front end; At the receiving end, the opposite processing is carried out with the front end, and the video signal transmitted by the twisted pair is reconverted into the video signal of SYV75 ohms, so as to achieve the transmission purpose
.
Network cables and optical fibers are mainly used for the transmission
of IP video signals.
With the deepening of the current network development process of the security industry, the application of network cables is also increasing
.
The main forms of network cables are Cat5 and Cat6 cables, one for short-distance IP network transmission; Optical fiber is generally used for long-distance video signal transmission, although it is very expensive in price, but optical fiber transmission has a series of advantages such as small attenuation, frequency bandwidth, free from electromagnetic wave interference, light weight, good confidentiality, etc.
, and has gradually become the darling
of communication cables.
