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. 23, 2025
Filed:
Jan. 26, 2023
Keysight Technologies, Inc., Santa Rosa, CA (US);
Keith Frederick Anderson, Santa Rosa, CA (US);
KEYSIGHT TECHNOLOGIES, INC., Santa Rosa, CA (US);
Abstract
A method and system synchronize first and second VNAs for testing a DUT over a long distance. The method includes receiving at the second VNA an RF signal from the first VNA; mixing the RF signal and an LO signal at the second VNA to output an IF signal to an ADC; determining a reference error ratio between a first reference clock in the first VNA and a second reference clock in the second VNA; adjusting an LO frequency to a corrected LO frequency by applying the reference error to a desired LO frequency; mixing the RF signal and the adjusted LO signal to output the IF signal; and resampling the IF signal at an adjusted sample rate to output a corrected IF signal corrected for the reference error, without adjustments being made to the first or second reference clock.