Some New Methods of Performing Low Frequency EMC Measurements

The realization that power line frequencies, transients and harmonics can cause harmful interference to sensitive electronic circuitry and equipment has pointed out the need for the measurement of low-frequency (10 Hz to 50KHz) spurious emissions. This paper will describe some means for measuring low-frequency radiated emissions from electronic equipment in accordance with Methods RE01 and RE04 of MIL-STD-461A, -462, and -463. Test measurement equipment, recommended practices and suggestions for obtaining valid test data will be analyzed.