Abstract: icated RF electromagnetic environment (EME). In consideration of the limits of the testing methods for receiver′s nonlinear characteristic given by GJB 151B, this paper presents a fast interference response testing technique based on the automated double frequency system. Experimental testing and analysis of receiver is performed here as an application example, which includes the detection and recognition of all the nonlinear interference response under scanning frequency （4~6）GHz. Testing results are pretty valuable for the estimation of the actual environment adaptation of the receiver and system in severe EME.

Key words: Complicated electromagnetic environment, Nonlinear, EMC test, Automated double-frequency testing system