Hello emc-pstc'ers, I have an EMC question about military / aerospace / automotive emissions standards. I hope I can get a wide / global answer to how standards 1. should be interpreted and 2. are interpreted when performing a test. It has been suggested that we as a test lab should perform "pre-scans" when making emissions measurements of a product. The purpose is to ensure that any intermittent emissions will be captured and that it should involve the use of max hold on a spectrum analyser with fast sweeps to ensure all frequencies are revisited many times a second for at least 20 seconds in each span. For each of: DO-160, MIL STD 461, CISPR 25 1. Do people believe the standard requires such a pre-scan? 2. Are test labs worldwide actually performing such a pre-scan? Thanks for your help, Luke Turnbull
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