The random noise test of analog to digital converters recommended by the IEEE 1057 Standard for digitizing waveform recorders is studied. heuristically derived expression presented estimation standard deviation experimentally validated. suggests a triangular stimulus signal. Here we will show how use sinusoidal signal carry out test. influence offset and amplitude on error also analyzed an comp...

the mixture of natural and artificial seismic sources with random distributions cause diffuse wave field with random amplitudes and phases called noise. when noise is analyzed in a long-term process, it contains surface waves which are spread in all directions. thus, ambient noise contains data relevant to the surface waves. in recent years, as broadband seismic networks have been distributed v...