Technical R f rence Note
Technical Reference Note
Rev.04.19.16_#1.1
ADNB 60W Series
Page 17
Radiated Emissions
Unlike conducted EMI, radiated EMI performance in a system environment may differ drastically from that in a stand-alone
power supply. It is thus recommended that radiated EMI be evaluated in a system environment. The applicable standard
is EN55022 Class B (FCC Part 15). Testing ac-dc convertors as a stand-alone component to the exact requirements of
EN55022 can be difficult, because the standard calls for 1m leads to be attached to the input and outputs and aligned such
as to maximize the disturbance. In such a set-up, it is possible to form a perfect dipole antenna that very few ac-dc
convertors could pass. However, the standard also states that ‘an attempt should be made to maximizethe disturbance
consistent with the typical application by varying the configurationof the test sample.
Artesyn Embedded Technologies
ARTESYN [ ARTESYN TECHNOLOGIES ]
