Method of locating a transmitting and receiving device

The invention relates to a method of locating a transmitter and receiver device, and a device for its implementation, wherein at least one first transmitting and receiving device transmits an interrogation with a predetermined transmit power this query is received by at least one second transmitting and receiving device with a receiving power preset and, when a reception completed successfully, the at least second transmitting and receiving device transmits a response signal, the response signal n ' being emitted when the field strength of the transmission signal at the location of the second transmitting and receiving device exceeds a predetermined threshold value or is in a threshold range, and the threshold value or threshold range being prefixed by the first transmitting and receiving device by means of a transmission device to the second transmitter and receiver.