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. 03, 2002
Filed:
Nov. 01, 2000
Yuji Kishi, Sagamihara, JP;
Anritsu Corporation, Tokyo, JP;
Abstract
A frequency conversion unit converts the frequencies of input signals into intermediate frequencies using a predetermined local oscillation frequency. A sweeping unit sweeps the local oscillation frequencies in a predetermined sweeping time. A filter selectively passes signals having frequency components of a predetermined bandwidth based on signals sent from the frequency conversion unit. An A/D converter samples signals that have passed the filter and converts them into predetermined digital data. A signal processing unit processes signals, extending the digital data saved in the data storage unit into frequency spectrum data. A correction data storage unit saves the correction data of the delay times for the bandwidth in the filter. Based on the correction data saved in the correction data storage unit, a control unit changes the timing at which data is sent from the A/D converter to the signal processing unit via the data storage unit, so that a measured frequency corresponding to the local oscillation frequency upon the start of sweep in the sweeping unit may be correlated with the data that corresponds to the measured frequency and has been saved in the storage unit, in a one-to-one relationship. An output unit provides frequency spectrum data that has been processed in the signal processing unit.