DETECTION METHOD OF UNAUTHORIZED INSTALLED RADIO-ELECTRONIC MEANS ON SUBSCRIBER COMMUNICATION LINES Russian patent published in 2017 - IPC G01R29/08 

FIELD: radio engineering, communication.

SUBSTANCE: accept the electromagnetic signals, amplify, divide into the spectral components. Alternately to subscriber line connect the sinusoidal voltage generator output, which is within the limits of documents requirements, regulating the possible range of power voltage. Compare the frequency of the spectral components with the generator frequency. If the frequencies of the spectral components of the received signal coincide with the frequency of the applied signal, it is concluded that there are the radio electronic means, installed unauthorized on the subscriber line, localize the communication line, otherwise pass to the next subscriber line.

EFFECT: increase of the unauthorized radio electronic means detecting probability, installed on the subscriber line at previously unknown initial parameters of the electromagnetic signals emitted by them.

2 cl, 4 dwg