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MIL-STD-1377

1971 Edition, August 20, 1971

Complete Document

EFFECTIVENESS OF CABLE, CONNECTOR, AND WEAPON ENCLOSURE SHIELDING AND FILTERS IN PRECLUDING HAZARDS OF ELECTROMAGNETIC RADIATION TO ORDNANCE; MEASUREMENT OF



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Description / Abstract:

This standard is intended to provide a weapon developer or designer with shielding and filter effectiveness test methods for determining whether the particular weapon design requirements of MIL-P-24014 have been properly implemented. It is not intended to be a substitute for full-scale electromagnetic hazards evaluation tests of the weapon system, but rather an aid in developing a weapon system with a high probability of successfully passing such environmental tests.

This standard covers the methods of shielding effectiveness of weapon enclosures, cables, and cable connectors over the frequency ranges of from 100 kilohertz (kHz) to 30 megahertz (MHz) and from 1000 MHz to 10 gigahertz (GHz). The shielding effectiveness test methods are conducted at two separate frequency ranges because of hardware limitations. It is unnecessary to measure shielding effectiveness between 30 MHz and 1000 MHz because of the Navy's limited use of these frequencies and because experience has indicated that shielding deficiencies in this range will probably appear in either of the two measured frequency ranges. The upper frequency for the test methods in paragraphs 4.4 and 4.5 may be increased to 40 GHz when applicable. This standard also covers the methods of measuring the filtering effectiveness of radio frequency (RF) suppression devices (filters) for weapon firing circuits over the frequency range of from 100 kHz to 10 GHz.