Has it ever occurred to you? When you set up a test to troubleshoot something, the problem that you tried to solve simply disappeared? You think the problem is gone, but only got told that the problem still exists in the field. But when you tried to reproduce the failure mode, the system just works fine? This could all because of a passive voltage probe. In this video, we demonstrated two most common errors that caused by passive probe. Engineers sometimes struggle for weeks, only to find it is the probe! No wonder they called EMC the "black magic".
