An On-line PLC frequency impedance analyzer

The development of an On-line PLC frequency impedance analyzer is presented. This analyzer will allow the impedances of power lines, transformers and other loads to be determined at PLC frequencies while they are powered up. This then allows efficient PLC couplers to be designed and PLC communication networks to be analyzed, to ensure that no parts of the network cause data communication failure by presenting short circuits at PLC frequencies to the rest of the network.