Shielding and Ageing Effects with Flexible Coaxial Cable

Abstract

In 1979 British Telecom introduced a tim e domain crosstalk te s t (R ef.l) to check the coaxial in tegrity of connectors close to the rep ea te rs on 1.2/4.4 mm and 2.6/ 9.5 mm coaxial cable system s. This te s t which used a high am plitude (typically 90 volt) high frequency pulse (10 ns raised cosine), caused unexpected in terference on some coaxial cables in close proximity to the te s t a rea.