How should the shield of a power line carrier PLC communication cable be grounded?

The grounding of power line carrier PLC communication cables should be selected based on the signal type and frequency. Low-frequency signals (<1MHz) use single-end grounding, typically at the receiving end, to avoid ground loops. High-frequency signals (>1MHz) use two-end grounding to reduce shielding impedance, but must ensure a small ground potential difference. Use shielding clips or connector metal shells to terminate the shielding layer 360 degrees to the shell. The grounding wire should be as short as possible, less than λ/10. During testing, the shielding layer transfer impedance should be less than 100mΩ/m. Proper grounding can improve shielding effectiveness by 30dB and reduce noise coupling.