Develops a standard method of measurement for evaluating the electromagnetic and radio frequency suppression capability of power-line filters in the frequency range of 100 Hz to 10 GHz. Applies to EMI/RFI filters in general (i.e., DC, single phase of poly phase systems rated for 600 V and below 1000 A). The method of measurement will describe general considerations, such as method of standardizing source impedance for nonlinear loads, temperature rise, attenuation measurement, components, and/or derating requirements when supplying non-sinusoidal load currents and operating in matched or mismatched impedance environments.