Emissions vs. Immunity: Why Military EMC Demands Both

A common misconception is that EMC compliance is primarily about emissions. MIL-STD-461G rejects that thinking outright. The standard treats emissions and susceptibility as inseparable. Emissions limits prevent a subsystem from contaminating the platform’s electromagnetic environment. Susceptibility tests ensure that the subsystem continues to function in that environment. Passing emissions alone only proves your equipment is polite. Passing susceptibility proves it is robust. Military systems require both, because real platforms do not offer controlled, quiet conditions.