ABSTRACT
This chapter provides an overview of power line communication (PLC) regulation. The development of the electromagnetic compatibility (EMC) standards specifying the signal level to be injected by PLC modems shows the trend to adaptive design concepts resolving interferences at the location, the frequency and the time where the modem is operated. Whenever there is a new EMC issue, regulatory committees might be requested, through a New Work Item Proposal (NWP), to solve the problem. In some cases, the reception of a low-power signal is disturbed despite the fact that surrounding devices comply with the relevant EMC standards. Comite International Special des Perturbations Radioelectriques (CISPR) 22 [3] specifies Vcm to be the voltage appearing across the CM impedance presented to the equipment under test (EUT) by an impedance stabilisation network (ISN). The JP limits for PLC transmissions in the high-frequency (HF) band apply to the common-mode (CM) current measured at the mains port of a PLC modem.
