The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 1985
Filed:
May. 11, 1983
Richard L Shimp, Harrisonburg, VA (US);
ComSonics, Inc., Harrisonburg, VA (US);
Abstract
A segmented upstream management system for a bidirectional coaxial network of the type including a bidirectional trunk (14) having a plurality of bidirectional feeders (12) and a plurality of drops (10) is disclosed. The management system includes a number of rerouting devices (36) connected in the bidirectional trunk at intervals so as to divide the number of drops into predefined groups. A plurality of upconverters (40) are connected to the outputs of the rerouting devices. The upconverters are in turn connected to a return only trunk (38) which transmits the frequency diverse, upconverted signals and each respective local oscillator signal from the upconverters to a hub or headend site (16). At the headend site, the return only trunk is connected to a plurality of synchronous down converters (42) which produce down converted signals from each of the predefined groups. FSK and other frequency/phase dependent data retain coherence by phase locking each down converter to the actual local oscillator which provided each respective upconversion. The system has particular application to bidirectional CATV systems which carry digital data transmissions from subscriber drops to a central hub or headend site.