Investigate emissions and susceptibility as a source-path-receiver problem. Cables, enclosure contacts and operating modes can change the result as much as a local PCB trace. Use these resources to make layout decisions and test configurations explicit.
Start with these questions
- What is the dominant source in the failing mode?
- How does noise reach a cable or sensitive circuit?
- Can the measurement be repeated after one controlled change?
Read the engineering guides
Apply a tool or checklist
What to keep in the project record
Document the operating mode, enclosure and cable arrangement with every result. Use the applicable product test requirements for acceptance.