ETS-Lindgren 7405 E & H Near Field Probe Set - Manual (Page 33)

www.ets-lindgren.com Common Diagnostic Techniques 33
Diagnosing Radiation Causes
A small sniffer probe can help diagnose the cause of an electromagnetic
interference problem. This section addresses using sniffer probes for a rough
estimate of field impedance, which is used to diagnose the radiation physics of a
given situation.
Knowing the field impedance can help find solutions to EMI problems. When
presented with an EMC/EMI problem, you need to know two things: 1) What is
radiating inside the unit, and 2) Why the component or circuit is radiating.