MIL-STD-461 RS101

RS101, part of MIL-STD-461, evaluates an equipment’s ability to withstand low-frequency magnetic fields (typically from 30 Hz to 100 kHz). The test simulates conditions where nearby electronic or magnetic sources—such as motors, inductors, or transformers—could create magnetic fields strong enough to disrupt sensitive systems. Ensuring resilience to these fields is critical in mission-critical environments, where uncontrolled interference or malfunction can lead to compromised performance or system failures.

During an RS101 test, a magnetic field coil or loop is placed near the Equipment Under Test (EUT). An alternating current (AC) signal within the specified frequency range is driven through the coil, creating a controlled, measurable magnetic field. The strength of this field is gradually increased or swept across the test frequencies according to the standard’s requirements. Meanwhile, the EUT operates in all relevant modes to capture its most vulnerable operating conditions. Test engineers monitor the EUT for any signs of operational anomalies—such as malfunction, data corruption, degraded output signals, or system resets.

A successfully completed RS101 test demonstrates that the product can endure low-frequency magnetic interference without performance degradation or disruption. This is especially important in defense, aerospace, and industrial sectors where high-reliability systems operate in complex electromagnetic environments. By meeting RS101 requirements, manufacturers and users gain confidence in the EUT’s ability to function reliably under real-world electromagnetic stress.