Frequency multiplexed seismic cable

Details Frequency multiplexed seismic cable Frequency multiplexed seismic cable

1978-06-12

1980-02-05

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

179 15FD, 333 32, G01V 122

Patent

active

041874935

ABSTRACT:
A cable for electrically connecting a plurality of seismic receivers to a central data collecting unit contains a single electrical channel. The output signal of each seismic receiver is used to modulate a carrier signal having its own distinct frequency. The plurality of modulated carrier signals are frequency division multiplexed onto the single electrical channel and transmitted to the central collecting unit. There, narrowband filters are used to demultiplex the individual modulated carriers so that the signals may then be demodulated to recover the individual seismic receiver signals.

REFERENCES:
patent: Re23919 (1955-01-01), Hawkins
patent: 2421333 (1947-05-01), Katchatouroff et al.
patent: 3239803 (1966-03-01), Godbey
patent: 3689841 (1972-09-01), Bello et al.
patent: 3754196 (1973-08-01), Collins
patent: 3958216 (1976-05-01), Chapman
patent: 3967259 (1976-06-01), Lecuyer
patent: 4145575 (1979-03-01), Shida et al.

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