1. Ferrite sheath current filters cannot effectively attenuate ground loop noise. 2. Sheath currents can run along the outer sheath of a coaxial cable.3. Sheath currents can be caused by ground loops.4. Without the use of baluns, sheath currents will occur on the unbalanced line. 5. Sheath currents may lower the efficiency of transmission and can interfere with nearby electronic devices.6. Ferrite sheath current filters are used for noise suppression, combating noise such as radio frequency interference. 7. With such an arrangement, a ferrite bead would only be effective to reduce sheath current standing waves. 8. Ferrite sheath current filters can only work effectively if a common-mode signal can flow on a line. 9. With a balun, sheath currents can be avoided when a balanced line is connected to an unbalanced line. 10. Transformer sheath current filters are used in low-frequency signal lines, where a ground loop otherwise can not be prevented.
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