Syv wire and cable

SYV wires and cables refer to solid polyethylene insulated coaxial cables, and the national standard code is radio frequency cable - also known as "video cable". It is often referred to as video cable, which can be used as a cable for surveillance cameras in the field of security. Video cable is divided into SYV and SYWV according to different materials. Video coaxial cable is also called video cable or video monitoring cable, because it is mainly used to transmit video signals. It is mostly used to connect security monitoring cameras and real terminals (computers or monitors, etc.).

Syv wire and cable characteristics

1. Good anti-interference performance and uniform impedance; 2. Good moisture resistance and long service life; 3. Low attenuation, low capacitance; 4. High transmission and stable structure.

Scope of application of syv cable

It is applicable to the transmission of analog signals and high-speed digital signals below 1GHZ; It is applicable to TV and radio signal control and related information transmission; It is applicable to signal transmission in fixed or mobile radio communications and electronic devices using similar technologies; It is applicable to video monitoring system, public antenna, closed-circuit television monitoring system, radio communication, transmission system and one-way system control or internal wiring of high-frequency machines

Difference between syv and sywv

Same points: 1. The characteristic impedance is the same - 75 Ω; 2. The outer sheath, shielding layer structure, outer diameter of insulation layer, number of braids, material selection, and shielding layer number are basically the same. Differences: 1. The physical characteristics of the insulation layer are different; 2. Core wire diameter is different; 3. The above two fundamental differences determine the transmission characteristics of the two cables - different transmission attenuation; 4. The obvious characteristics of the high braided cable are: the DC resistance of the shielding layer is small, and the low frequency attenuation below 200KHz is reduced, which is beneficial to the suppression of low frequency interference. From the perspective of frequency distortion (high and low frequency attenuation difference), the high braided cable is serious. The direct impact of frequency distortion is the normal proportional distortion of various frequency components of the video signal, which directly affects the image distortion; 5. Copper-clad steel core wire: This is a kind of SYWV cable, which is used for the radio frequency transmission of cable TV above 46MHz. The low frequency attenuation of 0-200KHz is too large.