Shielded parallel pair cable improves performance

28 March 2001 Interconnection

Spectra-Strip has taken high bandwidth differential cable technology a step further with its 'SKEWCLEAR Plus' shielded parallel pairs, designed to improve electrical performance and reduce labour costs associated with stripping shielded twisted pairs. Currently available up to 34 pairs, the SKEWCLEAR Plus cable uses a pre-programmed 63 mm laminate section, applied anywhere along the cable length to fixture the data pairs on a controlled pitch, typically 2,54 mm.

In the round cable format, SKEWCLEAR Plus has markings on the outer PVC jacket to indicate the presence of the laminate section. The 100 W shielded parallel pairs have extremely low in-pair skew (<10 ps/m) and pair to pair skew (< 33 ps/m). Near end crosstalk is more than 70 dB @ 1 GHz.

Comments Carl Booth, Director, Product Development: "Applications such as Future I/O with its sub-nanosecond rise times and gigahertz transmission frequencies demand that shielded cable pair strip lengths be kept to an absolute minimum in order to avoid crosstalk and reflections at the connector termination. By mass fixturing all of the pairs in a laminate structure, much more accurate mass stripping of the pairs can be performed with standard flat cable strippers. In addition, the extra labour associated with hand fixturing the pairs for stripping is avoided."

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