Standards-compliant MXE EMI receiver with real-time spectrum analysis (RTSA) option enables labs to observe and diagnose transient and wideband emissions during EMC compliance and precompliance testing. Specifically, RTSA mode enables MXE to provide real-time analysis bandwidth up to 85 MHz below 3.6 GHz and up to 40 MHz above 3.6 GHz. Frequency mask trigger (FMT) capability, included with RTSA, allows users to trigger on signals with durations as short as 17.4 µsec.