A spectrum analyzer is used for EMI (Electromagnetic Interference) pre-compliance testing to identify and measure unwanted electromagnetic emissions from electronic devices before they undergo full compliance testing. Pre-compliance testing helps engineers ensure that their designs meet regulatory limits for electromagnetic emissions, such as those set by the FCC, CISPR, or other governing bodies, before submitting them for costly and time-consuming certification tests.

With the UNI-T UTS3000A Signal Analyzer UTS3000A-EMI option enabled, users can perform EMI pre-compliance tests to find any early EMI issues with their designs.