Antennas for radiating or receiving electromagnetic fields; electromagnetic field probes for measuring an electromagnetic field; electromagnetic measurement software that enables a user to have computer control of an electromagnetic measurement configuration; electromagnetic test chambers for making electromagnetic measurements of scattering objects, electrical devices, or antennas; Radio frequency (RF) anechoic radiation absorbent material (RAM) to absorb radio frequency (RF) energy in an electromagnetic test chamber; positioners to position an object, device or antenna in an electromagnetic test chamber, namely, turntables that rotate, antenna scanning towers that move up and down, and multi-axis positioners; fiber optic instruments, namely, cameras; powerline and signal filters for filtering power lines and signal lines respectively to prevent signals originating from an exterior of an electromagnetic test chamber from entering the test chamber; Helmholtz coils used to produce a magnetic field of a controlled magnitude in a defined area or to nullify the earth's magnetic field in a defined area; Transverse Electromagnetic (TEM) devices, namely, electric field generators for generating an electric field of horizontal and/or vertical polarization and TEM test cells for radiated emissions and radiated immunity tests of electrical devices such as cell phones; line impedance stabilization networks to provide impedance matching in an electromagnetic test chamber; acoustically isolated enclosures to provide sound isolation between the interior and exterior of the enclosure; acoustic test chambers to make acoustic measurements of objects and acoustically radiating devices