Power line Compromising Emanations Analysis


The paper presents an innovative method used to analyze the video-compromising signals that computer equipment generates during normal operation. It presents the measurement results achieved for conducted emissions for a commercial laptop using a shielded power source and a commercial transformer as well as conducted emissions generated by a display unit which is connected to a laptop and is alternatively powered by a commercial and a shielded cable. In order to perform these tests, there were selected several graphical images consisting of horizontal bars of various widths to facilitate the detection and evaluation of the compromising video signal level. images