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:
Sep. 16, 2003
Filed:
Oct. 30, 2001
Wing Jong Mar, Rohnert Park, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A phase noise measurement module (PNMM), system and method for measuring phase noise improve accuracy of phase noise measurements of a signal under test (SUT) using a spectrum analyzer. The PNMM includes an RF to hF frequency converter and a selectable frequency divider. The system includes the PNMM connected to the spectrum analyzer and employs an LO signal from a tunable LO in the spectrum analyzer. The method includes directly converting an input SUT to an IF signal having either a second or a third IF frequency that is applied to a corresponding frequency conversion stage of the spectrum analyzer before the phase noise is measured. The present invention bypasses a first conversion stage, and typically a second conversion stage as well, of the spectrum analyzer and directly converts the SUT to either the second or third IF frequency, thereby reducing phase noise added to the SUT.