| 摘要 |
A receiving arrangement is provided, to receive audio frequency signals that are transmitted by way of lines of an alternating current distribution network. The audio frequency signals are decoupled from a low or medium voltage level of the network. The currents in one or more phases in such level are detected and the signal is applied to a receiver. The audio frequency signals are decoupled by means of one or more current transformers or voltage transformers and currents or voltages in secondary windings of signal transformers connected thereto are detected. Each secondary winding of the signal transformers with the ohmic resistance thereof and the load resistance thereof, forms a high-pass filter with the lowest frequency to be transmitted as its lowermost frequency. The signal transformer cooperates with an amplifier, summing or subtracting circuit in the receiving circuit.
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