Testing Data Processing Apparatus for Susceptibility to Electromagnetic Radiation Using a Moving Antenna
Original Publication Date: 1983-Jan-01
Included in the Prior Art Database: 2005-Feb-06
Data processing apparatus is ordinarily shielded so that one device does not radiate toward another device and so that a device does not receive radiation from an unshielded source. In a test of this shielding, the device is illuminated by a known source of electromagnetic radiation and its operation is monitored to detect any fault that is caused by the radiation. This test is often made in a confined area where the electromagnetic field is highly irregular. In this test, the test source antenna is scanned vertically to assure that the device under test receives the maximum radiation that the test is designed to produce. The frequency of the test source is varied over a predetermined range during the test, and an equalizer circuit maintains a uniform output throughout the test spectrum.