Abstract:
An improved communications cable and a method of making the same so as to minimize cross talk between units within the cable, in which a plurality of SZ stranded units are twisted to form groups which are then formed into layers so that adjoining units in any one layer have a different distribution function of length of lay and/or distance of reversal points of twist directions and with adjacent units in one layer similarly have different distribution function of length of lay and/or distance between reversal points than units in adjacent layers.
Abstract:
An improved method of twisting cables, particularly communications cables, made up of a plurality of cable units so as to maintain a high manufacturing rate while minimizing electrical coupling between cable units in which the process parameters, controlling a known SZ reversing twisting devices which twist the cable units, are randomly varied to cause the sums and differences of the twist, d and the number of reversals per unit length, a, to be continuously and alternatly increased and decreased by at least 0.5 percent about a mean value and so that one of the sum (d+a) and the difference (d-a) of each unit differs from that of at least one other unit by less than 10 percent.