Whitepaper
Accelerate Electromagnetic Interference Testing Using Real-Time Scan Measurement
This application note details Keysight’s Real-Time Scan (RTSC) measurement feature within the N9048B PXE EMI test receiver. The paper addresses limitations of traditional EMC testing methods – specifically gaps in data acquisition due to preselector filter switching in Time Domain Scans – which hinder accurate detection and troubleshooting of intermittent or fast transient signals. RTSC utilizes a 350 MHz FFT bandwidth for gapless signal capture, simultaneously displaying frequency, time, and spectrogram information with up to three EMI detectors. Results demonstrate that RTSC enables faster EMC debugging, allows users to analyze historical data from up to 12,000 time slices, and provides improved visualization of both broadband and narrowband signals compared to conventional methods for compliance testing against standards like CISPR, FCC, and others.