ITU-T G 345-1993 12 MHz SYSTEMS ON STANDARDIZED 1 2 4 4 mm COAXIAL CABLE PAIRS《1 2 4 4mm标准同轴电缆线对上的12MHz系统》.pdf

INTERNATIONAL TELECOMMUNICATION UNION)45G134 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU).4%2.!4)/.!,G0G0!.!,/5%G0G0#!22)%2G0G03934%-3).$)6)$5!,G0G0#(!2!#4%2)34)#3G0G0/ further amended)The provisions of this Recommendation are those appearing in Recommendation G.332 for systems on2.6/9.5 mm coaxial pair, with the exception of the following provision:5 Matching of the coaxial-pair impedance and repeater impedancesFor an elementary cable section about 2 km in length, the recommended value of N is 63 dB throughout thetransmitted frequency band, N being defined as in Recommendation G.332, 5.