| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a signal analyzer and its data generation method for generating data on both original analytical range and its partially-extended range, while collaterally updating both of the data. <P>SOLUTION: In this data generation method, the 1st frequency analytical range and the 2nd frequency analytical range narrower than this 1st one are established in operation panel 34 and the like. The 1st signal path 171 generates 1st time domain data of a measured signal with frequency converted per the 1st data generation rate established depending on the 1st frequency analytical range. The 2nd signal path 172 generates 2nd time domain data of a measured signal with frequency converted per the 2nd data generation rate, lower than the 1st data generation rate, established depending on the 2nd frequency analytical range. CPU collaterally receives both of these 1st and 2nd time domain data to generate 1st and 2nd frequency domain data by using Fast Fourier Transform. Then, there is set the difference in frequency shift amount during frequency conversion on the 1st and 2nd signal paths in response to the difference between the central frequencies in the first and second frequency analysis ranges. <P>COPYRIGHT: (C)2008,JPO&INPIT |
