Patent ID: 8408061

Claim:
An inspection device configured for inspecting a test object, comprising: a probe system; a digital logic device, configured to trigger the probe system, during a measurement at a given location on the test object, to cause a sequence of excitations of the probe system to produce a corresponding sequence of consecutive waves upon the location of the test object during the measurement, wherein the probe system, is further configured to receive a sequence of corresponding wave responses and to produce a sequence of corresponding electric signals; a receiver having a plurality of signal processing channels, each channel configured to scale the electric signals to a different degree and to produce a sequence of corresponding scaled signals; a channel selection device configured to select the scaled signals from the processing channels during successive acquisition cycles corresponding to the sequence of excitations; at least one analog to digital converter configured to digitize the selected scaled signals and to produce therefrom a sequence of digitized signal samples corresponding to the sequence of the excitations; a digital memory for storing the digitized signal samples; and wherein the digital logic device is configured to process the digitized signal samples to produce a composite signal output with a dynamic range that is higher than that of said analog to digital converter.