Analysis of the Effect of Deviated Modulating Signal Characteristics on the Susceptibility of a Small Medical Device

A variety of modulation techniques using various signal characteristics are used by the telecommunication industry in real-life applications. Despite this, the radiated immunity test based on the IEC 61000-4-3 only modulates in amplitude the carrier signal using a 1 kHz sine wave at 80% depth. In this study, we performed the radiated immunity test on a miniaturized device with biomedical applications using deviated signal-modulating characteristics than those mentioned in the IEC 61000-4-3. The results show that it is important to carry out an adequate risk analysis of the equipment under test (EUT) considering its unique functional characteristics before resorting to just the modulating frequency mentioned in the standards.