Two-wire multiplex seismic recording system

Details Two-wire multiplex seismic recording system Two-wire multiplex seismic recording system

1974-03-18

1976-05-18

Tubbesing, T. H.

Communications: electrical

Selective

Having electron beam device

340 155TS, 325410, G01V 100, H04B 116

Patent

active

039582167

ABSTRACT:
Apparatus for interconnection of seismic receivers using a two-wire connection and utilizing frequency diversification to maintain separation of received energy from each of the individual seismic receivers. Each seismic receiver is used in combination with a local oscillator having an individually distinctive frequency for modulated output and transmission via a two-wire conductor to a remote or centralized seismic signal processing or recording station. A module receiving each seismic receiver output provides gain controlled amplification prior to modulation of the output on a transmission carrier having a selected frequency.

REFERENCES:
patent: 2723387 (1955-11-01), Slavin
patent: R23919 (1955-01-01), Hawkins

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