Meaning
Radiated radio-frequency electromagnetic fields define the external environment addressed by this procedure. Laboratories use iec 61000-4-3 to verify that electronic equipment maintains performance when exposed to continuous wave or pulse-modulated transmissions. The verification process identifies susceptibility thresholds for devices intended for operation in proximity to transmitters like mobile phones, wireless local area networks or industrial radio equipment.
Field Calibration
Verification begins by characterizing the electromagnetic environment within a semi-anechoic chamber using an isotropic field probe. Technicians establish the field uniformity over a defined plane where the equipment under test sits. Measurements confirm that at least three quarters of the calibration points maintain a field strength within a specified decibel range of the target intensity.
Test Execution
Application of the modulated signal occurs while the device operates in its normal mode. Engineers increment the frequency across the specified range, typically from eighty megahertz up to six gigahertz, at a rate that allows the equipment to respond to potential interference. Evaluation focuses on the functional performance during this exposure, which checks for bit errors, screen flickering or software crashes.
Compliance Verification
Assessment of the final result determines if the hardware meets the required immunity level defined by the product specification. Any deviation from expected behavior during the sweep counts as a failure, regardless of whether the system recovers after the interference source stops. The test result establishes the electromagnetic compatibility boundary for the final assembly.
