Susceptibility of generic IT-networks

This paper evaluates experimentally the susceptibility of IT-networks under influences and the threats of HPEM (High Power Electromagnetic) and IEMI (Intentional Electromagnetic Interferences). As HPEM source a PBG 5 (Pulse Burst Generator) adapted to a TEM (Transversal Electromagnetic) Horn type antenna and a 90 cm IRA (Impulse Radiating Antenna) type antenna is used. Different network cable types and categories with different lengths are used. The immunity of the IT network is examined and the breakdown failure rate of the system is defined for a PRF (Pulse Repetition Frequency) of 500 s^-1 in duration of 10 seconds. Series of measurements were carried out and disturbances of keyboards, mouse, switches, distortions on monitors and failures of the IT network and, even crash of PCs were observed. It is shown amongst other that by increasing the pulse repetition rate or frequency, generic test IT-networks are more susceptible to interference. Obtained results provide another view of the susceptibility analysis of modern generic IT-networks against UWB-Threats.