抄録
New practical and cost-effective digital single channel seismic recorder and data-analyzer system were developed. The recorder consists of a high precision seismic digitizer and a general purpose personal computer. The digitizer utilizes a high-speed(320 kHz), wide dynamic range(120 dB), 16 bit floating point (12 bit mantissa and 4 bit exponent) A/D converter, Micro Networks MN 5420. The personal computer controls the digitizer and acquires digital data through DMA interface. The data are recorded on high density (1 GB /cartridge) digital audio tape, DAT, data storage system through SCSI interface. Sampling intervars and trace length can be selected among 4, 2, 1, 0.5, 0.25, 0.125 msec and 4, 2, 1, 0.5, 0.25, 0.125 sec, respectively. The recorded data can be played-back and displayed on the recorder and applied further processes with a wide range of computer systems. We show a field data example with a simple imaging analysis.
