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Keywords: frequency
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Proceedings Papers

Paper presented at the Subsea Control and Data Acquisition (SCADA) Conference, June 2–3, 2010
Paper Number: SUT-SCADA-10-89
... modulation (PPM) or frequency shift keying (FSK). PPM has traditionally been used for transmitting simple parameters, such as readings from temperature and depth sensors in seabed transponders. In a PPM scheme, two pulses are transmitted, and the time interval (t in Figure 5) between them corresponds to the...
Proceedings Papers

Paper presented at the Subsea Control and Data Acquisition: Proceedings of an international conference, April 4–5, 1990
Paper Number: SUT-AUTOE-v22-047
... range, up to the MVA range, and their large bandwidth, from DC to many MHz With respect to the lower end of the frequency spectrum, however, it is recommended to avold DC power in subsea systems where possible, since 50 SUBSEA CONTROL AND DATA ACQUISITION the slightest amount of seawater ingress will...

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