THESE ARE MILITARY FILTERS USED IN SECURE INFORMATION DISTRIBUTION SYSTEMS. THEY ARE COAXIAL FILTERS IN A HOUSING WITH A BANDWIDTH OF 962-1215 MHZ ( IE CENTRE FREQUENCY OF >485MHZ) AND AVERAGE PASSBAND LOSS OF 2.0dB (IE <3.5dB).

CLASSIFICATION IS DETERMINED BY THE PROVISIONS OF GENERAL INTERPRETATIVE RULES 1 AND 6 AS WELL AS THE TEXT OF HEADINGS 8529 ANDCN CODE 85291085 Filters, excluding surface acoustic wave filters, for a center frequency of 485 MHz or more but not exceeding 1 990 MHz with an insertion loss not exceeding 3,5 dB, contained in a housing