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:
Dec. 30, 1986
Filed:
Mar. 22, 1985
Toshihiro Kashiwagi, Ebina, JP;
Anritsu Electric Company Limited, Tokyo, JP;
Abstract
A measured signal is supplied to an indication section through a high-frequency amplifier, a frequency converter, and an intermediate frequency amplifier. A predetermined local oscillation signal from a local oscillator is supplied to the frequency converter. A reference signal generator generates harmonic pulses having a uniform level at a spectral interval substantially equal to or larger than the predetermined passband of the intermediate frequency amplifier, the uniform level being used to calibrate a level of the signal to be measured. A frequency setting section sets the frequency of the measured signal. A first switching section switches an input to the high-frequency amplifier to an output side of the reference signal generator in accordance with the frequency set by the frequency setting section. A control section controls an oscillation frequency of the local oscillator so as to set an indicated value at the indication section to a maximum value while an output from the reference signal generator is supplied to a high-frequency amplifier, and controls a gain of an amplifier such that the indicated value at the indication section is set to a predetermined indicated value while the local oscillator is being operated to provide the maximum value. And a second switching section switches the input to the high-frequency amplifier to an input side of the measured signal after gain control is performed by the control section.