Cable ring Definition: cable, also known as flexible printed circuit board (FPC). It belongs to the industry in accordance with the rules of the cable specification, line sequence, line color, line numbers, etc., for data transmission of moving parts and activities within the region, such as the computer's internal hard drive connected to the motherboard, optical drive data cable, mobile phone display board connector data lines, as well as data cable between devices are collectively referred to cable. The most important role is to eliminate magnetic ring cable, to reduce electromagnetic interference. Because electromagnetic interference computer equipment is large, especially in the computer room and so many environments. Thus, most high-end with a peripheral magnetic signal lines, thereby reducing the effects of electromagnetic interference on the peripheral data transmission. Also, note the use of the end of the signal line with a ring of connected PC, so the effect is the best. Cable ring: 1. The cable ring from the reduction of electromagnetic interference. 2. The cable bead is commonly used in anti-jamming electronic circuit components, there is a certain characteristic impedance for high-frequency noise has a good inhibition, and a radiation protection function. 3. The magnetic cable is commonly used in electronic circuits interference element, have a good high-frequency noise inhibition, magnetic interference is generally used at different frequencies have different impedance characteristics, generally at very low frequencies the impedance small, the higher the frequency, the stronger anti-interference performance. Cable ring options: cable ring in the selection, mostly nickel-zinc ring, FS's flat ring main ring outer diameter condition allows to select a bigger, longer length, diameter as fitting the data lines diameter, so anti-jamming performance to achieve the best results. Constant volume, long, thin stubby than good interior strength of the inhibitory effect of the inhibitory effect is smaller the better.