Electromagnetic emission detection, transceiver and system

A system comprising:

• a transceiver, TX/RX PHY, arranged for bi-directional data communication of a node with a counterpart node connected to a point-to-point network using differential mode signaling over a single twisted-pair cable, the TX/RX PHY has a common mode choke and a detection section;
• and
• a differential mode choke,
• wherein the common mode choke is arranged between of the TX/RX PHY and the single twisted-pair cable and is provided for common mode current suppression;
• wherein the differential mode choke is arranged between the TX/RX PHY and the single twisted-pair cable and in parallel to the common mode choke and provided for differential mode current suppression;
• wherein the detection section is coupled to the differential mode choke and configured to detect a common mode signal on the single twisted-pair cable in response to a transmission of a test signal by the counterpart node.

A method of detecting a common mode signal on a single twisted-pair cable used for bi-directional data communication between a node and a counterpart node of a point-to-point network using differential mode signaling, the method comprising:

• operating a choke in differential mode current suppression,
• wherein the choke is connected to the single twisted-pair cable;
• asserting a test signal on the single twisted-pair cable;
• and
• detecting a common mode signal on the single twisted-pair cable occurring in response to the assertion of a test signal by the counterpart node using the choke and a detection section (500) of a transmitter, TX/RX PHY, of the node.