For daily network transmission, the main thing is fiber optic and network cable. In information transmission, optical fiber looks full of advantages, such as long transmission distance, stable signal, low attenuation, high speed rate, etc. Many users will definitely prefer optical fiber. But looking at the current form, the network cable still occupies an important position in many households as well as production areas. The PK between the two is far from over.
Let’s explore what are the irreplaceable features of each from the advantages of network cable and optical fiber.
A, the advantages of optical fiber
1, fiber optic band width
The width of the frequency band represents the size of the transmission capacity. The higher the frequency of the carrier, the greater the bandwidth of the signal can be transmitted. In the VHF band, the carrier frequency is 48.5MHz to 300Mhz.
2、Fiber optic strong anti-interference ability
Because the basic component of optical fiber is quartz, only transmitting light, not conductive, not subject to the role of electromagnetic fields, in which the transmission of optical signals are not affected by electromagnetic fields, so fiber optic transmission of electromagnetic interference, industrial interference has a very strong resistance.
3, the installation of optical fiber is less difficult compared to the network cable
Single-mode fiber optic core diameter is generally 4um ~ 10um, the outer diameter is only 125um, plus the waterproof layer, reinforcement, sheath, etc., with 4 to 48 optical fibers composed of optical fiber cable diameter is less than 13mm, much smaller than the diameter of the standard coaxial cable 47mm, plus the fiber is glass fiber, small specific gravity, so that it has a small diameter, light weight, very easy to install.
4, low loss of optical fiber
In all cable channels have the same loss, do not need to introduce equalizer for equalization as the cable trunk; its loss almost does not change with the temperature, do not have to worry about the fluctuations of the trunk level caused by changes in ambient temperature.
5, fiber optic transmission is more reliable
Because fiber optic transmission generally does not require relay amplification, no new nonlinear distortion will be introduced because of amplification. As long as the laser has good linearity, it can transmit the TV signal with high fidelity. Because the fiber optic system contains a small number of devices, the reliability is naturally high.
Second, the advantages of network cable
1、 Long transmission distance and high transmission quality
Because of the advanced processing technology used in the twisted pair transceiver, excellent compensation for the attenuation of the video signal amplitude of the twisted pair and the attenuation difference between different frequencies, maintaining the brightness and color of the original image and real-time, in the transmission distance of 1km or more, the image signal is basically distortion-free. If the relay method is used, the transmission distance will be farther.
2、 Convenient wiring and high utilization of cable
Any pair of network cables widely laid in the building can transmit a video signal without additional wiring. If you use a pair of lines to transmit video signals, the other pairs of lines can also be used to transmit audio signals, control signals, power supply or other signals to improve the utilization of cable, while avoiding the trouble caused by a variety of separate signal wiring, reducing the cost of the project.
3, shielded class network cable just strong interference ability
As with optical fiber, in a strong interference environment, the network cable can also transmit excellent image signals. Moreover, several pairs of twisted-pair cables in a cable transmit different signals separately, without interfering with each other.
4, professional knowledge is easier to grasp
Many network cables, their own simple instructions can be easily installed, the use is also very simple, without professional knowledge, there is not much operation, once installed, long-term stable work.
5、 Affordable price, easy to take materials
This is one of the advantages of the network cable, the current use of various types of network cable, compared to fiber optics, the price is much cheaper, and easy to buy channels.
