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:
Jun. 28, 2016
Filed:
May. 05, 2015
Applicant:
Jds Uniphase Corporation, Milpitas, CA (US);
Inventors:
Al Ruth, Indianapolis, IN (US);
Rodney Harbison Weaver, Macon, GA (US);
Koji Okamoto, Indianapolis, IN (US);
Assignee:
VIAVI SOLUTIONS INC., Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 3/46 (2015.01); H04B 17/354 (2015.01); H04L 27/34 (2006.01);
U.S. Cl.
CPC ...
H04B 17/354 (2015.01); H04L 27/34 (2013.01);
Abstract
A signal leakage in a cable network may be detected by using a test device to obtain a spectrum of an electromagnetic wave propagating in vicinity of the cable network, and automatically detecting QAM channels in the obtained spectrum by detecting characteristic spectral roll-offs at boundary frequencies between QAM channels of the cable network. A test device may be used to determine which QAM channels are currently active on the cable network, thereby facilitating automatic QAM signal leakage detection.