What is the barbed wire in the cable line?
Some good quality line, in addition to the shielding network, but also wrapped in this layer of gold-plated film, its role is shielding.
If there is no such network, the TV signal is highly susceptible to some of the frequency of interference, resulting in increased noise on the screen, and even lead to poor synchronization.
The surrounding environment is filled with various frequencies of stray electromagnetic waves, such as a large number of various switching power supply, the use of string motor.
The main purpose of signal transmission using cable TV lines is to ensure high-quality transmission of signals.
The wire mesh in the cable line is the shield. The role of shielding network is to shield the external environment of the spurious radio signal.
