Patent ID: 7071675
Filing Date: 2006-07-04
Classification: G01R

Abstract:
1. A band distribution inspecting device for inspecting the band distribution of a scattered oscillation signal oscillated containing a frequency variation from the fundamental frequency with the fundamental frequency of the fundamental oscillation signal as a reference point, comprising: a band pass filter which the scattered oscillation signal is inputted to and has a predetermined pass band of a predetermined narrow-band width with respect to the band distribution; and a signal strength detector which receives a predetermined band pass signal outputted from the band pass filter and outputs a band strength signal corresponding to a signal amplitude; and an oscillator section for setting the fundamental frequency of the fundamental oscillation signal so that it is adjustable, wherein the band distribution is inspected according to a change in the position of band distribution shifted corresponding to the fundamental oscillation signal in which the fundamental frequency changes, with respect to the predetermined band pass signal.