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Keywords: transmitter
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Proceedings Papers

Paper presented at the SPE Automation Symposium, April 18–19, 1968
Paper Number: SPE-2088-MS
... shift transmitter that ncrmally dwells or the center frequency of a three-state condition; It shifts to the mark frequency when the mark side of the channel is keyed; likewise, it shifts to the space frequency when the space side of the channel is keyed. The block labeled QR-30 is a frequency shift...
Proceedings Papers

Paper presented at the SPE Automation Symposium, April 28–29, 1966
Paper Number: SPE-1370-MS
... on the marketless than a year}have none- thelessfoundexcellentapplications~ a numberof industries. .. Aa AlarmEncoder The first is a new digt%al.encoaer, design- ated the MARC808A,which combinesthe advantagesof low-cost) self-containedunit housing theencoderspower supplyant tone transmitter. The unit 4...
Proceedings Papers

Paper presented at the SPE Production Automation Symposium, May 17–18, 1962
Paper Number: SPE-351-MS
... minute is taken. The continuous or intermittent sampler may be paced or actuated by an electric time clock, either a pneumatic or hydraulic transmitter, if the pulse is transmitted on ~ definite time interval. The most commoni-x used transmitter is the electric time clock when electric power is available...

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