Established in 1974, A.H. Systems Inc. manufactures a complete line of EMC test equipment. Its individually calibrated EMC test antennas, preamplifiers, current probes and low-loss cables meets many test standards, including CISPR, MIL-STD, FCC, EN, VDE, IEC and SAE. The company offers a wide variety of antenna calibration services, including antenna factor, beamwidth, VSWR and gain calculation. It also provides rental equipment for most of its products. A.H. Systems Inc. is located in Chatsworth, Calif.