R&S ES-SCAN is a cost-efficient software application that has been developed for Rohde & Schwarz EMI test receivers and spectrum analyzers. The main requirements of electromagnetic interference measurements in accordance with commercial standards have been combined in an easy-to-use application: measurement settings and storage, scan data acquisition and display with automatic data reduction, peak search with acceptance limit and selection of subranges, final measurement with worst-case selection, report generation, and measurement data storage.