Establishment of "6dB" Criteria for MIL-E-6051c Electro-Magnetic Compatibility Testing of Manned Weapons Systems

This paper deals with Lockheed Engineering Flight Test experience in the preparation of electromagnetic campatibility test plans on F-104G (MAP) and other later model F-104 aircraft. Literal interpretation of MIL-E-6051C as applied to test plan requirements for various types of electronic and electrical systems is covered. Specifically, the establishment of malfunction criteria for several types of systems including electronic, synchro-type, optical, radar, and pyro-technics are expanded upon. Problems in test plan development encountered for each individual system type are discussed, including how the most critical interference point in a particular system is determined; how a "malfunction" is determined; and how the test plan is prepared from the established information. Lockheed believes that the resulting interference test plans were some of the most comehensive ever written for a modern fighter aircraft. Many useful ideas for EMC test plan preparation may be drawn frcam the information presented.