1. The shielding layer is grounded at one end by directly grounding the metal shielding layer at one end of the shielded cable, while the other end does not need to be grounded or protectively grounded.
Single-ended grounding uses the method of suppressing the potential difference to eliminate electromagnetic interference. This method is more suitable for short-distance transmission cable systems, and the induced voltage corresponding to the cable length cannot exceed the safe voltage range.
2. Double-ended grounding needs to be grounded at both ends of the shielded cable.
When both ends of the shielding layer are grounded, the metal shielding layer cannot generate induced voltage, and the metal shielding layer is affected by the electromagnetic interference, and a shielding circulating current will pass through the cable. Large circulating current, and the circulating current will produce signal attenuation, so the double-ended grounding is more difficult.
