A few remarks on correct Load Simulator configuration for CISPR 25 Conducted Emissions Current test method.
First of all you have to show the LISN in your EMC Test Plan block diagrams. The way the LS is connected is not identical for each CISPR 25 test method. I will never use a Load Simulator unless is no other way around or I would want to turn it into a RF filter box. Examples of CEI good and bad setups are shown below:
CEI WRONG CONFIGURATION
CEI GOOD CONFIGURATION
To clarify how a PWM maker is connected:
From EMC compliance perspective the goal is to avoid as much as possible common line impedances: