| 摘要 |
PROBLEM TO BE SOLVED: To expand the dynamic range of a spectrum analyzer when the analyzer measures a signal noise, such as a leakage power between adjacent channels. SOLUTION: The spectrum analyzer measures the internal noise PS (dBm) of the analyzer under the same condition as a signal noise measuring condition (S2) and the signal noise PM (dBm) (S3), and the analyzer obtains the real noise power PN by performing correcting computation by using an equation, PN (dBm)=10 log(10PM/10-10PS/10) (S4).
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