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. 27, 2010
Filed:
Nov. 23, 2005
Norihiko Sato, Chiba, JP;
Shinobu Kubota, Kanagawa, JP;
Kazutomo Tohyama, Kanagawa, JP;
Tektronix, Inc., Beaverton, OR (US);
Abstract
CW lock is conducted with less manual operation. A first inputreceives a black burst (BB) signal from a key TV station. A second inputreceives a continuous wave (CW) signal having an accurate, known frequency. A phase adjust signal generatorgenerates a reset signal having a known phase relationship with regard to the key TV station BB signal. The reset signal is used as a phase adjust signal. A PLLreceives the CW signal to provide clock. A counterreceives the clock and provides a frame pulse signal for synchronizing the key and local TV signals at a local TV station wherein the BB signal of the local station may be derived from the frame pulse signal. The counteruses the reset signal to adjust the phase relationship between the key TV station BB signal and the frame pulse to a desired phase relationship based upon the key TV station BB signal.