Apparatus for fiber optic seismic exploration system

Details Apparatus for fiber optic seismic exploration system Apparatus for fiber optic seismic exploration system

1984-11-30

1990-03-13

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367149, 455601, 375 4, G01V 122

Patent

active

049088025

ABSTRACT:
A two-port fiber optic repeater includes means for receiving and restoring command word signals and means for receiving and restoring return data signals. A periodically actuated power supply supplies power to circuitry for sensing valid signal inputs to the repeater. When valid signal inputs are sensed, a main power supply is enabled to supply constant power to signal restoration circuitry. The pulse width of the command word signals are adjusted. The return data signals are restored using a fixed-frequency oscillator and a counter.

REFERENCES:
patent: 3973240 (1976-08-01), Fong
patent: 4019048 (1977-04-01), Maione et al.
patent: 4072923 (1978-02-01), Siems et al.
patent: 4090067 (1978-05-01), Bell et al.
patent: 4360729 (1982-11-01), Harvey et al.
patent: 4408307 (1983-10-01), Harris
MDS-14 Operator's Manual--RTU; pp. 2-2 and 2-21 through 2-24.
MDS-14 Maintenance Manual--RTU; pp. RTUO-1, RTUO-2 & drawings.
MDS-16 Operator's Manual--RTU-II; pp. 1-9; 3-1 through 3-13.
MDS-16 Maintenance Manual--RTU-II.

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