| 摘要 |
Method and apparatus for enabling the transmission of high bandwidth analog and digital data over cable lengths of more than 1000 feet through semi-shielded or unshielded four wire cable. Three balanced mode signals are transmitted using four conductors (210a, 210b; 214a, 214b). The components (A+, A-) of a first balance mode signal (A) are respectively carried on a first pair of conductors (210a, 210b). The components (B+, B-) of a second balance mode signal (B) are respectively carried on a second pair of conductors (214a, 214b). The components (C+, C-) of a third balance mode signal (C) are respectively carried on a pair of conductors synthesized through the commonality of the first and second pair of conductors (210a, 210b; 214a, 214b), respectively. This technique creates an additional virtual ground plane (218), wherein signal energy can be transmitted without interference with the other signals being transmitted on the balance conductor pairs. |
