| http://www.w3.org/ns/prov#value | - The first method is the ASK (Amplitude Shift Keying) modulation method where the data is made to correspond with two kinds of amplitudes, the second method is the FSK (Frequency Shift Keying) modulation method where the data is made to correspond with two kinds of frequencies, and the third is the PSK (Phase Shift Keying) modulation where the data 1/0 are made to correspond with the presence and
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