| 摘要 |
In a seismic system in which signals from a plurality of geophones are carried by pairs of conductors to each of a plurality of array terminals, where the geophone signals are converted to square wave signals, and on successive commands, the square wave signals are sampled, the samples are temporarily stored, and are then transmitted to storage means, the improved method of transmitting the geophone signals from the geophones to the array terminals, comprising; amplifying and square waving the geophone signals at the geophones, and transmitting the square wave signals to the array terminals. Included also are steps to modulate carrier signals in synchronism with the square wave signals to form bursts of carrier signals which are transmitted to the array terminals, where the bursts of carrier signals are detected and the square wave signals are regenerated, and sampled.
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