METHOD AND APPARATUS FOR SYNCHRONIZING MODULAR SEISMIC SYSTEM

摘要

A method and apparatus for synchronizing a modular seismic system wherein each seismic station includes a data acquisition module having means for sampling the geophone signal, a gain ranging amplifier adjusting the gain of the signal amplifier and an analog to digital converter converting the amplified signal to digital form. The module also includes means for transmitting to succeeding stations digital signals received from previous stations and its own digital signal. All of the modules are coupled in series by coaxial cables while power is supplied over a separate two-conductor power cable. A coded word is transmitted over the power cable to synchronize the sampling of the geophone signal and control operation of the module.