Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent
1993-09-23
1996-12-10
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
367 79, G01V 122, H03M 100
Patent
active
055838243
ABSTRACT:
Disclosed is a telemetry data transmission circuit for a towed hydrophone streamer, the streamer comprised of a plurality of series-coupled modules. The transmission circuit comprises: (1) a slave clock input in a first module capable of receiving a master timing signal from a master clock source located in a second module, the master timing signal capable of synchronizing an operation of the transmission circuit to allow the transmission circuit to place local telemetry data on a data bus coupled to the transmission circuit and running a length of the streamer, (2) a local clock input in the first module capable of receiving a local timing signal from a local clock source located in the first module, the local timing signal alternatively capable of synchronizing the operation of the transmission circuit and (3) a clock source selection circuit capable of allowing the local clock source to synchronize the operation of the transmission circuit as a function of a condition of the master timing signal.
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Moskowitz Nelson
Whitehall Corporation
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