Patent ID: 9140730
Filing Date: 2015-09-22
Classification: G01R

Abstract:
1. A signal analysis apparatus comprising: frequency conversion means, that includes a first attenuator which adjusts a level of an analog input signal, for converting the input signal into a predetermined intermediate frequency signal; second attenuation means for adjusting a level of an output signal from the frequency conversion means; analog/digital conversion means for converting an output signal from the second attenuation means into a digital signal; frequency response correction means for correcting a frequency response of an output signal from the analog/digital conversion means; signal analysis means for analyzing an output signal from the frequency response correction means; and noise floor level subtraction means that receives the output signal from the frequency response correction means, subtracts, in a predetermined frequency band, a noise level of the analog/digital conversion means from a noise floor level indicating a noise level of a signal path, which includes the frequency conversion means, the second attenuation means, and the analog/digital conversion means, to the frequency response correction means, and outputs the subtracted signal to the signal analysis means.