This AIR provides guidance to the EMI test facility on how to check performance of the following types of EMI test equipment: Current probe Line Impedance Stabilization Network (LISN) Directional coupler Attenuator Cable loss Low noise preamplifier Rod antenna base Passive antennas All performance checks can be performed without software. A computer may be required to generate an electronic or hard copy of data. This is not to say that custom software might not be helpful; just that the procedures documented herein specifically eschew the necessity of automated operation. Purpose The purpose of this AIR is not to reproduce the procedures used by an accredited calibration facility@ but rather to provide simple and accurate methods available using only test equipment found in an EMI test facility. For simplicity@ all set-ups are shown using a network analyzer@ but a spectrum analyzer or EMI receiver with built-in tracking generator may be used in lieu of a network analyzer@ and if that isn??t available@ a separate signal generator may replace the tracking generator. The effects of these substitutions are discussed in Section 4. Measurement methods offered herein are not exclusive@ but found to work well with a minimum of complexity.