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:
Jul. 11, 2006
Filed:
Oct. 20, 2005
William Lo, Cupertino, CA (US);
Yiqing Guo, Cupertino, CA (US);
Tak Tsui, Sunnyvale, CA (US);
Tsin-ho Leung, San Jose, CA (US);
Runsheng He, Sunnyvale, CA (US);
Eric Janofsky, Sunnyvale, CA (US);
William Lo, Cupertino, CA (US);
Yiqing Guo, Cupertino, CA (US);
Tak Tsui, Sunnyvale, CA (US);
Tsin-Ho Leung, San Jose, CA (US);
Runsheng He, Sunnyvale, CA (US);
Eric Janofsky, Sunnyvale, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
A physical layer device including a first port and a second port comprises a cable tester that communicates with the first and second ports and that determines a cable status, which includes an open status, a short status, and a normal status. Opposite ends of a cable selectively communicate with the first and second ports. The cable tester includes a test module that transmits a test pulse on the cable, measures reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer communicates with the cable and that selectively outputs a plurality of signals at a plurality of frequencies on the first port. An insertion loss calculator receives the signals on the second port and that estimates insertion loss.