IEEE 299-1997

This project will add cost effective test methods by minimizing the number of measurements, provide test procedures in the frequency range 20 to 300 MHz, and establish the size of the shielded enclosure for which the standard applies. Presently, there is a need to reduce the number of measurements needed to show the shielding effectiveness. The standard also does not cover the frequency range between 20 and 300 MHz which is needed to present the shielding effectiveness in the frequency range for which the most common shielded rooms self resonate. In addition, there is a need to modify certain procedures presently in the standard. Finally, there is no stated minimum size of the shielded room for which the standard c an be applied. All of these items need to be addressed in the revision of this standard. Revision Standard - Superseded. Superseded by IEEE Std 299-2006. Uniform measurement procedures and techniques are provided for determining the effectiveness of electromagnetic shielding enclosures at frequencies from 9 kHz to 18 GHz (extendable to 50 Hz and 100 GHz, respectively) for enclosures having no dimension less than 2.0 m. The types of enclosures covered include, but are not limited to, single-shield or double-shield structures of various construction, such as bolted demountable, welded, or integral with a building; and made of materials such as steel plate, copper or aluminum sheet, screening, hardware cloth, metal foil, or shielding fabrics.