Advanced analysis for separation of ambient and device under test emission for in-situ measurements

Wind turbines have a strong impact on the radio environment and need to be tested for electromagnetic emissions. With their size, in-situ measurements at the location of operation apply. The test engineer has to deal with a challenging environment including ambient electromagnetic emissions. The draft of IEC 61400-40 [2] standard is currently under development and deals with in-situ wind turbine measurements. The standard assumes knowledge on the present ambient emissions. This paper presents methods on how to examine those using advanced analysis methods of a real-time spectrum analyzer.