When you select the magnetic ring magnetic flux, consider two main factors:

To improve transmission rate and the stability, also to reduced transmission line in transfer data Shi on other equipment, as sound card of interference, design has shielding layer, magnetic ring this shield layer is by a more thin of metal foil tablets or is more unit fine copper wire woven into mesh made, application of is electrostatic field of surface effect principle, is will data transfer line of appearance bread Shang a layer metal film, and will this shield layer and chassis for grounding, on can is good to will data line and space interference signal isolation!

Filter magnetic ring magnetic flux is loss, mainly used to suppress conducted interference on the cables.

When you select the magnetic ring magnetic flux, consider two main factors: magnetic ring magnetic interference characteristics of impedance and filtering circuits.

The appearance point of view, giving priority to the "as long as possible, maximum thickness, inside diameter as small as possible, inductors as small as possible," the magnetic ring.

The biggest advantage of using a magnetic ring magnetic flux is no electrical connection with the filtering circuit; the biggest drawback is the magnetic ring is fragile, it is recommended to use magnetic ring with a plastic shell and fixed in the filtering power cables or control cables.

In addition, filtering power cables or control cables in the magnetic flux through the ring, then repeated on the magnetic ring around a few times, can increase cable inductance will have better interference suppression effect.