Because of the large number of waveforms (up to 64 sensors) and the continuous recording at very high frequency (5 MHz), we introduced an array-processing scheme for locating the source of the acoustic emissions.
Even for the short-period components, the peaks and troughs in the waveforms (up to the first swing of S-wave) are well reproduced at stations KGS003, KGS004, KGS036, and KYK, which are distant from the P-wave nodes.
A device capable of applying random repetitive pressure pulses was fitted to the column of water to produce dynamic pressure waveforms up to three hundred cycles per minute.
As an example, it was possible to display the waveforms, up to 5 trend graphs or 6 histograms of selected digital parameters.
Moreover, an electric waveform of up to 120 kHz with a higher sampling frequency is prepared as a special mode in order to obtain the amplitude and phase of the waveform with better time resolution.
We observed correct output waveforms at up to 40 GHz.
A phase-to-amplitude converter (PAC), which uses the phase accumulator output word (phase word) usually as an index into a waveform look-up table (LUT) to provide a corresponding amplitude sample.
Take care so that the inserted section is the same number of samples as the deleted section, and if possible, make sure the waveforms line up at the beginning and the end.
Finally, we conclude in Section 5. FMCW radars transmit a sequence of waveform signals with up and down chirps.
