POWER LINE CARRIER COMMUNICATION SYSTEM, POWER LINE CARRIER COMMUNICATION EQUIPMENT USED FOR THE SYSTEM, FREQUENCY MUTUAL CONVERTER AND POWER LINE CHARACTERISTIC DETECTOR

摘要

PROBLEM TO BE SOLVED: To provide a power line carrier communication system in which different frequencies are communicated even when communication is made to pluralities of power line carrier communication equipments in different carrier frequencies in matching with the frequency characteristic of power lines. SOLUTION: The system is provided with a frequency mutual converter 1 that is placed between a power line carrier communication equipment 2 that applies narrow band modulation (phase modulation and amplitude modulation or the like) to communication data and makes communication at a frequency f1 via a power line and other power line carrier communication equipment 3 that applies narrow band modulation (phase modulation and amplitude modulation or the like) to the communication data and makes communication at a frequency f2 via a power line and communication can be executed by converting the signal in the carrier frequency f1 into the signal in the frequency f2 and the signal in the carrier frequency f2 into the signal in the frequency f1.