The sensitive parameters of the electromagnetic interference (EMI) are important for the analysis of the interference mechanism and electromagnetic compatibility (EMC) prediction. This paper points out that the quasi-peak may be sensitive parameter except peak and RMS, and verification tests are conducted on a VHF radio. The single frequency and amplitude modulation (AM) wave tests can tell the parameter which the equipment under test (EUT) is sensitive to, and get some necessary information of EUT. The dual-frequency tests have verified the effectiveness and rationality.