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What is FSK in relation to aviation recorders?

April 26, 2017Aviation fsk recorders relation

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What is FSK in relation to aviation recorders?

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By definition, Frequency-Shift Keying or FSK is a form of frequency modulation in which the modulating signal shifts the output frequency between predetermined values. In relation to aircraft recorders, it is simply a data format that is utilized to input GMT (Greenwich Mean Time). Some recorders are able to either handle GMT via low speed ARINC 429 input or FSK or both.