Radiated Immunity

Chamber Setup

Testing runs inside a shielded anechoic chamber to prevent the test signals from escaping into the environment. A signal generator and a power amplifier supply the radio frequency signal to the broadband antenna facing the equipment. This setup creates a uniform field area where the device is placed for the evaluation.

Failure Condition

Failure is defined as any degradation of performance or loss of function that exceeds the limit specified by the manufacturer. The monitoring equipment must track the status of the device during the exposure sequence to catch any transient errors. Typical failures include communication drops, sensor resets or display corruption.

Design Defense

Electronic designers use shielding cans and ferrite beads to protect sensitive circuits from external electromagnetic fields. Decoupling capacitors are placed close to the power supply pins of integrated circuits to bypass induced currents to the ground plane. These design measures prevent external fields from disrupting the normal operation of the device, which ensures that it passes the compliance testing on the first attempt and maintains its reliability in the field.