Accession Number:

ADP000550

Title:

Pair Lay Distribution with Regard to Far-End Crosstalk in Symmetric Telecommunication Cable,

Descriptive Note:

Corporate Author:

PIRELLI S A SANTO ANDRE (BRAZIL)

Personal Author(s):

Report Date:

1982-11-01

Pagination or Media Count:

6.0

Abstract:

The selection of the pair lay distribution to achieve satisfactory far-end crosstalk FEXT in symmetrical telecom cables is a problem which frequently has to be faced when dealing with machinery of already existing production lines. In this paper a solution to this problem, obtained by means of a semi-empirical formula relating the decoupling between critical pair combination to the FEXT is described. This solution has been computerised to simplify cable design work and details of the computer program are given. In order to verify the validity of this approach a comparison has been carried out between predictions obtained from the theory and FEXT measurements made on more than 230 km of specially manufactured concentric and unit cable. The results, as shown in the paper, demonstrate a close correlation between theory and measurement and this provide a satisfactory confirmation of the proposed design procedure. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE