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:
May. 17, 1988
Filed:
Oct. 23, 1985
Jose R Diaz, Sunrise, FL (US);
Norman J Donaghue, Jr, Plantation, FL (US);
Racal Data Communications Inc., Sunrise, FL (US);
Abstract
In a method and apparatus for transmitting data over either a DDS-I (74) or DDS-II (DDS-SC) network (34), a primary and secondary channel are accommodated preferably for providing both primary data capability and diagnostics for the network. Primary and secondary channel data are multiplexed with control information in a standard DDS-SC frame. The system timing circuitry is locked to the DDS data rate and means for providing encoding and decoding of bipolar violations is provided so that the digital service unit (DSU) is compatible with both types of digital data service. At power-up, a microcomputer (102) reads the DSU clock frequency and the voltage offset of operational amplifiers and provides adjustment through digital to analog converters (210,294).